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EP0353309A1 - Method of constructing a well - Google Patents

Method of constructing a well Download PDF

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Publication number
EP0353309A1
EP0353309A1 EP89901623A EP89901623A EP0353309A1 EP 0353309 A1 EP0353309 A1 EP 0353309A1 EP 89901623 A EP89901623 A EP 89901623A EP 89901623 A EP89901623 A EP 89901623A EP 0353309 A1 EP0353309 A1 EP 0353309A1
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EP
European Patent Office
Prior art keywords
diameter
drilling
tour
profile
tube
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89901623A
Other languages
German (de)
French (fr)
Other versions
EP0353309A4 (en
EP0353309B1 (en
Inventor
Gabdrashit Sultanovich Abdrakhmanov
Albert Gabidullovich Zainullin
Fillipp Grigorievich Arzamastsev
Rashit Akhmedullovich Uteshev
Rustam Khamitovich Ibatullin
Izil Galimzyanovich Jusupov
Anatoly Vasilievich Perov
Midkhat Rakhmatullovich Mavljutov
Rashit Khaibullovich Sannikov
Vil Faizullovich Galiakbarov
Ilyas Anisovich Urazgildin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TATARSKY GOSUDARSTVENNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNY INSTITUT NEFTYANOI PROMYSHLENNOSTI
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TATARSKY GOSUDARSTVENNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNY INSTITUT NEFTYANOI PROMYSHLENNOSTI
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/10—Reconditioning of well casings, e.g. straightening
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/14—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling

Definitions

  • the invention relates to drilling methods and, in particular, relates to a method for constructing a multi-tube tour drilling under complicated conditions of drilling rocks.
  • the present invention can be most effectively used to cover layers inconsistent with drilling conditions, i. H. of layers with abnormal deposit pressures of the zones of rock or rock fall in the borehole as well as the complication zones, which are characterized by an intensive flushing loss, liquid or gas inflow from the digested layer and cannot be sealed with the available means.
  • a method of constructing a multi-pipe tour well which includes drilling rock, which is accompanied by winding the bottom of the borehole to wash away the rock crushed by drilling.
  • the reservoir pressures are balanced by the pressure of the flushing column, which is regulated by changing the specific weight of the flushing.
  • the layers often differ greatly due to the pressure within the deposit, which makes it impossible to regulate this balance by changing the specific weight of the mud.
  • the digested layer is covered with a casing pipe tour before the subsequent layer is digested, which is then cemented in order to prevent the disrupted layers from influencing one another; after choosing a specific flushing weight corresponding to the reservoir pressure of the subsequent layer, the drilling continues, but already with a chisel of smaller diameter.
  • the borehole is formed from the borehole mouth to the productive layer with a gradually decreasing diameter, whereby several concentrically arranged casing pipes are used to solidify the borehole walls used tours.
  • These pipe tours are usually referred to as guide pipe tours, conductors, intermediate pipe tours and conveyor pipe tours according to their functional intended use.
  • Such a method for the construction of boreholes requires a great deal of time, cement and casing pipes.
  • a method of building multi-tube tour bores is also known (SU, A, 907220), which involves drilling rocks and consolidating them with casing pipes which form a guide tube tour, a conductor, intermediate pipe tours and a production tube tour.
  • SU multi-tube tour bores
  • casing pipes which form a guide tube tour, a conductor, intermediate pipe tours and a production tube tour.
  • profiled tubes which are expanded when they are installed by generating a pressure gradient in them and then rolling them on. This makes it possible to cover the zone of flushing loss and continue drilling the hole in order to then install a corresponding casing tour.
  • the construction of the bore represents a multi-pipe tour drilling with a concentric arrangement of the casing tours, ie the use of intermediate pipe tours is not excluded, which are intended to cover layers incompatible with the drilling conditions. Consequently, the expenditure of time and materials for the construction of a borehole is also high in this case, which is also formed with a borehole diameter that gradually decreases depending on the deep drilling.
  • it is often necessary to replace drilling tools for the corresponding borehole diameter which also lengthens and increases the cost of the process, the ind strie is forced to manufacture many types of drilling tools and equipment for no reason.
  • the present invention has for its object to develop in such a method for the construction of a multi-tube tour, which ensures the consolidation of the bore after the installation of guide tube tours and a conductor with casing tours, which have the same inner diameter.
  • the object is achieved in that, in a method for the construction of a multi-pipe tour drilling, which involves drilling rocks, solidifying them with a guide pipe tour, a conductor, covering layers which are incompatible with the drilling conditions while sealing the complication zones with profile pipes, which are used during installation widened and rolled into the previously expanded complication zones, and includes the installation of a conveyor tube tour, according to the invention, once the bore has been solidified with the guide tube tour and the conductor, drilling with chisels of the same diameter is carried out, the sealing of the complication zones and the coverage of the with regard to the drilling conditions, incompatible layers are carried out with profiled tubes which, after their expansion, have the same inner diameter and which are successively depending on the digestion of those which are incompatible with the drilling conditions Layers built.
  • At least one of the profile tubes has an initial outside diameter which is smaller than the borehole diameter in the complication zone, with the inside diameter being brought to the inside diameter of the other rolled tubes when the tube is expanded by rolling.
  • the profiled tube prefferably be rolled up to a diameter which exceeds its initial diameter by 3 to 5%. This ensures a maximum hardness increase of the pipe metal depending on the type of metal and wall thickness by 130 to 260%. With a further increase in the diameter of the profile tube by more than 5%, its resistance to the crushing external pressure is only slightly increased, and this leads to a dangerous decrease in the jand thickness of the profile tube.
  • a well with a chisel of large diameter is drilled and solidified with a guide casing tour. Then you continue drilling with a chisel of smaller diameter and solidify again with a casing tour, which is referred to as a conductor. Then drill to the projected depth with a chisel of the same diameter, with a reamer being placed above the chisel before digging up the incompatible layers, using the diameter of the hole drilled by the chisel to one Diameter is expanded, which is the outer diameter of the expanded profile tubes.
  • a layer with a pressure that exceeds the crushing strength of the profiled tubes is opened up by drilling, then between these profiled tubes are placed, the outer diameter of which before the profiling thereof is smaller than the borehole diameter; the length of the profile tubes is slightly larger than the complication zone with abnormally high reservoir pressure, and they become rolled up to a diameter that exceeds the initial diameter of the pipes by 3 to 5% before they are profiled.
  • drilling for a lead casing tour 1 (Fig. 1) was carried out to a depth of 6 m using a 394 mm diameter chisel and the drilling was carried out with conventional 324 mm casing pipes Solidified outer diameter.
  • Drilling was then continued with a 295 mm diameter bit to a depth of 300 mm while drilling with a drilling fluid of 1.1 g / cm 3 density and the drilling was consolidated with a 245 mm diameter conductor 2. Then the drilling was carried out using a chisel with a diameter of 215.9 mm to the projected depth of the drilling of 1800 m.
  • Zone 3 of the water outlet was sealed at a depth of 460 to 470 m with profiled tubes 4, which without reducing the borehole diameter in an interval of 380 to 480 m by dressing the same with a pressure of 10 to 12 MPa of the liquid acting from the inside and Subsequent pressing by rolling was installed on the wall bottom of the borehole, which had previously been expanded to a diameter of 235 mm using a scraper.
  • Zones 3 1 of the oil outlet and the water outlet were sealed at a depth of 600 to 640 m using a similar procedure.
  • the profile pipes 4 1 were installed in an interwall of 534 to 650 m.
  • Zone 3 11 of the water outlet was also sealed at a depth of 820 to 840 m by means of profile pipes 4 11 in an interval of 800 to 900 m.
  • drilling was continued using a 215.5 mm diameter chisel using a drilling fluid with a density that corresponds to the geological conditions of a productive layer 5 to be digested, namely with a density of 1.43 g / cm 3 . and and a conveyor tube tour 6 with a diameter of 146 mm was installed.
  • M in the depths of 330-800 of a drilling fluid having a density of 1.29 g / cm 3 and at the depth of 800 m was up to 900 using - at a density of 1, 6 g / cm 3 drilled.
  • the set of profile tubes 4 is installed on a drill pipe 11 up to the complication zone 7 with an abnormally high deposit pressure, so that this zone 7 is accommodated in relation to the central part 3 of the profile tube to be solidified, the diameter of the circumference thereof being 3 to 5% smaller than the borehole diameter in the previously enlarged zone 7, while the diameter of the lower and the upper part of the set of pipes 4 is equal to the diameter of the enlarged part of the hole in the complication zone 7.
  • the middle tube 4 is expanded and pressed tightly against the borehole walls, while the packer elements 8 separate the zone 7 of the bore to be sealed from the rest of the same (FIGS. 3, 4).
  • the shoe 9 is released from this tube.
  • the tube 4 of the profile tube tour 4 is deformed in the radial direction, which leads to a metal hardening, which is expressed in an increase in the metal hardness.
  • the increase in hardness is 130 to 260% depending on the type of steel and the wall thickness.
  • the invention can. to cover layers with abnormal deposit pressures as well as to cover the zones of rock or rock fall in the well and the complication zones, which are characterized by an intensive flushing loss, liquid or gas flows from disrupted layers, which are not possible with existing agents have it sealed.

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  • Life Sciences & Earth Sciences (AREA)
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  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
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Abstract

Verfahren zum Bau einer Bohrung, welches das Bohren vom Gesteinen, deren Verfestigung mit einer Leitrohrtour (1), einem Konduktor (2), einer Förderrohrtour (6) und die Abdichtung der Komplikationszonen (3) des Bohrens mit Profilrohren (4), welche beim Einbau aufgeweitet werden, einschließt. Die Aufweitung der Profilrohre (4) wird durch Erzeugung eines Druckgefälles in diesen und anschließendes Aufwalzen derselben durchgeführt. Das Bohren von Gesteinen nach der Verfestigung der Bohrung mit der Leitrohrtour (1) und dem Konduktor (2) wird mittels eines Meißels ein und desselben Durchmessers durchgeführt, wobei die Komplikationszonen (3) bis zu einem Durchmesser erweitert werden, der dem Außendurchmesser der aufgeweiteren Profilrohre (4) gleich ist, welche aufeinanderfolgend in alle Komplikationszonen (3) je nach dem Aufschluß derselben eingebaut werden.

Figure imgaf001
Process for the construction of a borehole, which involves the drilling of rocks, their consolidation with a guide tube tour (1), a conductor (2), a conveyor pipe tour (6) and the sealing of the complication zones (3) of the drilling with profile pipes (4), which during Installation to be expanded, includes. The expansion of the profile tubes (4) is carried out by creating a pressure gradient in these and then rolling them on. Drilling rocks after the hole has solidified with the guide tube tour (1) and the conductor (2) is carried out by means of a chisel of one and the same diameter, the complication zones (3) being expanded to a diameter which is the same as the outer diameter of the expanded profile tubes (4), which are successive in all Complication zones (3) can be installed depending on the digestion of the same.
Figure imgaf001

Description

Technisches GebietTechnical field

Die Erfindung bezieht sich auf Bohrverfahren und betrifft insbesondere ein Verfahren zum Bau einer Mehrrohrtourbohrung unter komplizierten Bedingungen des Bohrens von Gesteinen.The invention relates to drilling methods and, in particular, relates to a method for constructing a multi-tube tour drilling under complicated conditions of drilling rocks.

Die vorliegende Erfindung kann am wirksamsten angewendet werden zur Uberdeckung von hinsichtlich der Bohrbedingungen unverträglichen Schichten, d. h. von Schichten mit anomalen Lagerstättendrücken der Zonen des Nachfallens von Gestein oder der Steinälle in der Bohrung sowie der Komplikationszonen, die duch einen intensiven Spülungsverlust, Flüssigkeits- oder Gaszufluß aus der aufgeschlossenen Schicht gekennzeichnet sind und sich mit den vorhandenen Mitteln nicht abdichten lassen.The present invention can be most effectively used to cover layers inconsistent with drilling conditions, i. H. of layers with abnormal deposit pressures of the zones of rock or rock fall in the borehole as well as the complication zones, which are characterized by an intensive flushing loss, liquid or gas inflow from the digested layer and cannot be sealed with the available means.

Zugrundeliegender Stand der TechnikUnderlying state of the art

Es ist ein Verfahren zum Bau einer Mehrrohrtourbohrung bekannt, das das Bohren von Gestein einschließt, welches von einem Spulen der Bohrlochsohle zum Wegspülen des durch Bohren zerkleinerten Gesteins begleitet wird. Die Lagerstättendrücke werden durch den Druck der Spülungssäule ausgeglichen, der durch Anderung des spezifischen Gewichtes der Spülung geregelt wird. Oft unterscheiden sich die Schichten jedoch stark durch den Druck innerhalb der Lagerstätte, wodurch es nicht möglich wird, dieses Gleichgewicht durch Anderung des spezifischen Gewichtes der Spülung zu regeln. In diesen Fällen wird die aufgeschlossene Schicht vor dem Aufschluß der darauffolgenden Schicht mit einer Futterrohrtour überdeckt, die dann zementiert wird, um eine gegenseitige Beeinflussung der aufgeschlossenen Schichten zu verhindern; nach der Wahl eines dem Lagerstättendruck der darauffolgenden Schicht entsprechenden spezifischen Gewichtes der Spülung wird das Niederbringen der Bohrung fortgesetzt, aber schon mit einem Meißel kleineren Durchmessers. Die Bohrung wird vom Bohrlochmund bis zur produktiven Schicht mit einem stufenweise nach unten abnehmenden Durchmesser ausgebildet, wobei man zur Verfestigung der Bohrlochwandungen mehrere konzentrisch angeordnete Futterrohrtouren verwendet. Diese Rohrtouren werden entsprechend ih rem funktionellen Verwendungszweck gewöhnlich als Leitrohrtouren, Konduktor, Zwischenrohrtouren und Förderrohrtouren bezeichnet. Ein solches Verfahren zum Bau von Bohrungen erfordert einen hohen Aufwand an Zeit, Zement und Futterrohren.A method of constructing a multi-pipe tour well is known, which includes drilling rock, which is accompanied by winding the bottom of the borehole to wash away the rock crushed by drilling. The reservoir pressures are balanced by the pressure of the flushing column, which is regulated by changing the specific weight of the flushing. However, the layers often differ greatly due to the pressure within the deposit, which makes it impossible to regulate this balance by changing the specific weight of the mud. In these cases, the digested layer is covered with a casing pipe tour before the subsequent layer is digested, which is then cemented in order to prevent the disrupted layers from influencing one another; after choosing a specific flushing weight corresponding to the reservoir pressure of the subsequent layer, the drilling continues, but already with a chisel of smaller diameter. The borehole is formed from the borehole mouth to the productive layer with a gradually decreasing diameter, whereby several concentrically arranged casing pipes are used to solidify the borehole walls used tours. These pipe tours are usually referred to as guide pipe tours, conductors, intermediate pipe tours and conveyor pipe tours according to their functional intended use. Such a method for the construction of boreholes requires a great deal of time, cement and casing pipes.

Das Streben nach einer Verminderung der Anzahl von Zwischenrohrtouren durch Vergrößerung der Tiefe des Bohrens mit einem Meißel eines bestimmten Durchmessers führt oft zu zusätzlichen Komplikationen und Havarien, wie Steinfälle und Festwerden der Bohrgarnitur.The pursuit of reducing the number of intermediate pipe tours by increasing the depth of drilling with a chisel of a certain diameter often leads to additional complications and accidents, such as falling stones and hardening of the drilling set.

Es ist auch ein Verfahren zum Bau von Mehrrohrtourbohrungen bekannt (SU, A, 907220), das das Bohren von Gesteinen und die Verfestigung derselben mit Futterrohren einschließt, welche eine Leitrohrtour, einen Konduktor, Zwischenrohrtouren und eine Förderrohrtour bilden. Durch die Verwendung dieses Verfahrens werden die bei der Vorbereitung eines Projektes für den Bau einer Bohrung nicht ermittelten Zonen des Spülungsverlustes mit Profilrohren überdeckt, welche bei deren Einbau durch die Erzeugung eines Druckgefälles in ihnen und anschließendes Aufwalzen aufgeweitet werden. Dadurch wird es möglich, die Zone des Spülungsverlustes zu überdecken und das Niederbringen der Bohrung fortzusetzen, um dann eine entsprechende Futterrohrtour einzubauen.A method of building multi-tube tour bores is also known (SU, A, 907220), which involves drilling rocks and consolidating them with casing pipes which form a guide tube tour, a conductor, intermediate pipe tours and a production tube tour. Through the use of this method, the zones of the mud loss not determined during the preparation of a project for the construction of a well are covered with profiled tubes, which are expanded when they are installed by generating a pressure gradient in them and then rolling them on. This makes it possible to cover the zone of flushing loss and continue drilling the hole in order to then install a corresponding casing tour.

Aber auch in diesem Fall stellt die Konstruktion der Bohrung eine Mehrrohrtourbohrung mit einer konzentrischen Anordnung der Futterrohrtouren dar, d. h.,es ist die Verwendung von Zwischeurohrtouren nicht ausgeschlossen, die für die Uberdeckung von hinsichtlich der Bohrbedingungen unverträglichen Schichten vorgesehen sind. Folglich ist auch in diesem Fall der Aufwand an Zeit und Materialien für den Bau einer Bohrung hoch, welche ebenfalls mit einem je nach dem Tieferbohren stufenweise abnehmenden Bohrlochdurchmesser ausgebildet wird. Außerdem ist es beim Niederbringen einer solchen Bohrung erforderlich, für den entsprechenden Bohrlochdurchmesser oft Bohrwerkzeuge auszuwechseln, was ebenfalls den Prozeß verlängert und verteuert, wobei die Industrie gezwungen ist, unbegründet viele Typengrößen von Bohrwerkzeugen und -ausrüstungen herzustellen.But even in this case, the construction of the bore represents a multi-pipe tour drilling with a concentric arrangement of the casing tours, ie the use of intermediate pipe tours is not excluded, which are intended to cover layers incompatible with the drilling conditions. Consequently, the expenditure of time and materials for the construction of a borehole is also high in this case, which is also formed with a borehole diameter that gradually decreases depending on the deep drilling. In addition, when drilling such a hole, it is often necessary to replace drilling tools for the corresponding borehole diameter, which also lengthens and increases the cost of the process, the ind strie is forced to manufacture many types of drilling tools and equipment for no reason.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eim solches Verfahren zum Bau einer Mehrrohrtourbohrung zu entwickeln, das die Verfestigung der Bohrung nach dem Einbau von Leitrohrtouren und einem Konduktor mit Futterrohrtouren gewährleistet, welche einen gleichen Innendurchmesser aufweisen.The present invention has for its object to develop in such a method for the construction of a multi-tube tour, which ensures the consolidation of the bore after the installation of guide tube tours and a conductor with casing tours, which have the same inner diameter.

Offenbarung der ErfindungDisclosure of the invention

Die gestellte Aufgabe wird dadurch gelöst, daß man bei einem Verfahren zum Bau einer Mehrrohrtourbohrung, welches dasBohren von Gesteinen, die Verfestigung derselben mit einer Leitrohrtour, einem Konduktor, die Überdeckung von hinsichtlich der Bohrbedingungen unverträglichen Schichten unter Abdichtung der Komplikationszonen mit Profilrohren, die beim Einbau in die vorher erweiterten Komplikationszonen aufgeweitet und aufgewalzt werden, sowie den Einbau einer Förderrohrtour einschließt, erfindungsgemäß man nach der Verfestigung der Bohrung mit der Leitrohrtour und dem Konduktor das Bohren mit Meißeln ein und desselben Durchmessers vornimmt, wobei man die Abdichtung der Komplikationszonen und die Uberdeckung der hinsichtlich der Bohrbedingungen unverträglichen Schichten mit Profilrohren durchführt, welche nach deren Aufweitung einen gleichen Innendurchmesser aufweisen und welche man aufeinanderfolgend je nach dem Aufschluß der hinsichtlich der Bahrbedingungen unverträglichen Schichten einbaut.The object is achieved in that, in a method for the construction of a multi-pipe tour drilling, which involves drilling rocks, solidifying them with a guide pipe tour, a conductor, covering layers which are incompatible with the drilling conditions while sealing the complication zones with profile pipes, which are used during installation widened and rolled into the previously expanded complication zones, and includes the installation of a conveyor tube tour, according to the invention, once the bore has been solidified with the guide tube tour and the conductor, drilling with chisels of the same diameter is carried out, the sealing of the complication zones and the coverage of the with regard to the drilling conditions, incompatible layers are carried out with profiled tubes which, after their expansion, have the same inner diameter and which are successively depending on the digestion of those which are incompatible with the drilling conditions Layers built.

Das Niederbringen der Bohrung mit Meißeln ein und desselben Durchmessers nach dem Einbau der Leitrohrtour und des Konduktors gestattet es, den vorgegebenen Bohrlochdurchmesser bis zu der projektierten Tiefe beizubehalten, die Verwendung von Zwischenrohrtouren auszuschließen und folglich den Materialaufwand zu reduzieren und den Bau der Bohrungen zu beschleunigen.The drilling of the bore with chisels of the same diameter after the installation of the guide tube tour and the conductor makes it possible to maintain the specified borehole diameter up to the projected depth, to exclude the use of intermediate pipe tours and consequently to reduce the material expenditure and to accelerate the construction of the boreholes.

Dabei wird außerdem die Anzahl der Havarien vermindert, weil die Komplikationszonen sofort je nach dem Aufschluß derselben überdeckt werden.The number of accidents is also reduced because the complication zones are immediately covered depending on the disruption of the same.

Bei der bevorzugten Ausführungsvariante der Erfindung weist mindestens eines der Profilrohre einen Ausgangsaußendurchmesser auf, der kleiner als der Bohrlochdurchmesser in der Komplikationszone ist, wobei bei der Aufweitung des Rohres durch Aufwalzen sein Innendurchmesser auf den Innendurchmesser der anderen aufgewalzten Rohre gebracht wird.In the preferred embodiment variant of the invention, at least one of the profile tubes has an initial outside diameter which is smaller than the borehole diameter in the complication zone, with the inside diameter being brought to the inside diameter of the other rolled tubes when the tube is expanded by rolling.

Bei einer solchen Vergrößerung des Durchmessers wird die Festigkeit des Profilrohres bei dessen Aufwalzen durch die Beseitigung der Unruhdheit und die Anderung des Metallgefüges erhöht, und es wird folglich auch der Widerstand gegen zerdrückende Außendrücke erhöht, welche vom Gestein ausgeübt werden. Das gibt die Möglichkeit, Profilrohre als Uberdeckungen von Schichten mit einem anomal hohen Lagerstättendruck zu verwenden und dadurch diese Rohre und die Förderrohrtouren gegen die zerdrückenden Kräfte mit billigeren Mitteln zu schützen.With such an increase in diameter, the strength of the profiled tube when it is rolled up is increased by removing the unsteadiness and changing the metal structure, and consequently the resistance to crushing external pressures which are exerted by the rock is also increased. This makes it possible to use profile tubes as coverings of layers with an abnormally high deposit pressure and thereby to protect these tubes and the conveyor tube tours against the crushing forces with cheaper means.

Es ist recht zweckmäßig, daß das Aufwalzen des Profilrohres bis zu einem Durchmesser vorgenommen wird, der seinen Ausgangsdurchmesser um 3 bis 5 % übersteigt. Dadurch wird ein maximaler Hartezuwachs des Rohrmetalls je nach Metallsorte und Wanddicke um 130 bis 260 % gesichert. Bei einer weiteren Vergrößerung des Durchmessers des Profilrohres um mehr als 5 % wird sein Widerstand gegen den zerdrückenden Außendruck nur wenig erhöht, und das führt zu einer gefährlichen Abnahme der Janddicke des Profilrohres.It is quite expedient for the profiled tube to be rolled up to a diameter which exceeds its initial diameter by 3 to 5%. This ensures a maximum hardness increase of the pipe metal depending on the type of metal and wall thickness by 130 to 260%. With a further increase in the diameter of the profile tube by more than 5%, its resistance to the crushing external pressure is only slightly increased, and this leads to a dangerous decrease in the jand thickness of the profile tube.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Andere Ziele und Vorteile der vorliegenden Erfindung werden nachstehend anhand einer eingehenden Beschreibung eines Ausfünrungsbeispiels der Erfindung und der beigefügten Zeichnungen näher erläutert. Es zeigt:

  • Fig. 1 die Konstruktion einer Bohrung, die nach dem erfindungsgemäßen Verfahren gebaut wurde (Längsschnitt);
  • Fig. 2 eine Bohrung mit einem in dieser eingebauten Profilrohr, dessen mittlerer Teil nach dem Abrichten einen Außendurchmesser aufweist, der kleiner als der Bohrlochdurchmesser ist (Längsschnitt);
  • Fig. 3 eine Bohrung mit einer in der Komplikationszone eingebauten Profilrohrtour;
  • Fig. 4 einen Schnitt nach Linie IV-IV der Fig. 2;
  • Fig. 5 einen Schnitt nach Linie V-V der Fig. 2.
Other objects and advantages of the present invention will be explained in more detail below with reference to a detailed description of an embodiment of the invention and the accompanying drawings. It shows:
  • Figure 1 shows the construction of a hole that was built by the method according to the invention (longitudinal section).
  • 2 shows a bore with a profile tube installed in it, the central part of which, after dressing, has an outer diameter which is smaller than the borehole diameter (longitudinal section);
  • Fig. 3 shows a hole with one in the complication zone built-in profile tube tour;
  • Fig. 4 is a section along line IV-IV of Fig. 2;
  • 5 shows a section along line VV of FIG. 2nd

Beste Ausführungsform der ErfindungBest embodiment of the invention

Das Verfahren zum Bau einer Mehrrohrtoubohrung wird in folgender Reihenfolge durchgeführt.The procedure for the construction of a multi-tube drilling is carried out in the following order.

Es wird eine Bohrung mit einem Meiβel groβen Durchmessers niedergebracht und mit einer Leit-Futterrohrtour verfestigt. Dann bohrt man mit einem Meiβel kleineren Durchmessers weiter und verfestigt man erneut mit einer Futterrohrtour, die als Konduktor bezeichnet wird. Dann bohrt man bis zur projektierten Tiefe mit einem Meiβel ein und desselben Durchmessers, wobei vor dem Aufschluß der hinsichtlich der Bohrbedingungen unverträglichen Schichten oberhalb des Meiβels ein Räumer angeordnet wird, mit dossen Hilfe der Durchmesser der Bohrung, die vom Meiβel gebohrt wurde, bis zu einem Durchmesser erweitert wird, der dem Auβendurchmesser der aufgeweiteten Profilrohre gleich ist. Dann baut man an dem Bohrgestänge in die Zone der hinsichtlich der Bohrbedingungen unverträglichen Schicht eine Profilrohrtour ein, weitet man diese durch den Druck einer in diese einzupressenden Flüssigkeit auf und kalibriert den Durchgangsquerschnitt der Rohre mittels einer Aufwalzvorrichtung bis zu einem Durchmesser, der einen freien Durchgang des Meiβels zum weiteren Bohren gewahrleistet. Ahnlich werden alle darauffolgenden hinsichtlich der Bohrbedingungen unverträglichen Schichten und Komplikationszonen beim Niederbringen der Bohrung bis zur projektierten Tiefe aufgeschlossen und verfestigt, wonach in die Bohrung eine Förderrohrtour eingebaut und zementiert wird.A well with a chisel of large diameter is drilled and solidified with a guide casing tour. Then you continue drilling with a chisel of smaller diameter and solidify again with a casing tour, which is referred to as a conductor. Then drill to the projected depth with a chisel of the same diameter, with a reamer being placed above the chisel before digging up the incompatible layers, using the diameter of the hole drilled by the chisel to one Diameter is expanded, which is the outer diameter of the expanded profile tubes. Then you build a profile pipe tour on the drill pipe into the zone of the layer incompatible with the drilling conditions, expand it by the pressure of a liquid to be pressed into it and calibrate the passage cross section of the pipes by means of a rolling device up to a diameter that allows a free passage of the Chisels guaranteed for further drilling. Similarly, all subsequent layers and complication zones that are incompatible with the drilling conditions are digested and solidified when the borehole is brought down to the projected depth, after which a production tube tour is installed and cemented in the borehole.

Wird eine Schicht mit einem Druck, der die Zerdrückungsfestigkeit der Profilrohre übersteigt, durch Bohren aufgeschlossen, so werden zwischen diesen Profilrohre untergebracht, deren Außendurchmesser vor dem Profilieren derselben kleiner als Bohrlochdurchmesser ist; dabei ist die Länge der Profilrohre etwas größer als die Komplikationszone mit anomal hohem Lagerstättendruck, und sie werden bis zu einem Durchmesser aufgewalzt, der den Ausgangsdurchmesser der Rohre vor deren Profilierung um 3 bis 5% übersteigt.If a layer with a pressure that exceeds the crushing strength of the profiled tubes is opened up by drilling, then between these profiled tubes are placed, the outer diameter of which before the profiling thereof is smaller than the borehole diameter; the length of the profile tubes is slightly larger than the complication zone with abnormally high reservoir pressure, and they become rolled up to a diameter that exceeds the initial diameter of the pipes by 3 to 5% before they are profiled.

Das erfindungsgemäβe Verfahren zum Bau der Bohrung kann man am folgenden Beispiel veranschaulichen.The method according to the invention for the construction of the bore can be illustrated by the following example.

In Übereinstimmung mit dem Projekt für das Niederbringen der Bohrung wurde das Bohren für eine Leit-Futterrohrtour 1 (Fig. 1) mittels eines Meiβels mit 394 mm Durchmesser bis zu einer Tiefe von 6 m durchgeführt, und die Bohrung wurde mit herkömmlichen Futterrphren mit 324 mm Außendurchmesser verfestigt. Dann wurde das Bohren mit einem Meiβel mit 295 mm Durchmesser bis zu einer Tiefe von 300 mm unter Spülung mit einer Bohrspülung von 1,1 g/cm3 Dichte fortgesetzt, und die Bohrung wurde mit einem Konduktor 2 mit 245 mm Durchmesser verfestigt. Dann wurde das Bohren mittels eines Meiβels mit 215,9 mm Durchmesser bis zur projektierten Tiefe der Bohrung von 1800 m durchgeführt. Dabei wurde die Zone 3 des Wasseraustritts in einer Tiefe von 460 bis 470 m mit Profilrohren 4 abgedichtet, die ohne Reduzierung des Bohrlochdurchmessers in einem Intervall von 380 bis 480 m durch Abrichten derselben mittels eines Druckes von 10 bis 12 MPa der von innen einwirkenden Flüssigkeit und anschließendes Andrücken durch Aufwalzen an die Wandunben des Bohrloches eingebaut wurden, das vorher mittels eines Räumers bis zu einem Durchmesser von 235 mm erweitert wurde.In accordance with the well drilling project, drilling for a lead casing tour 1 (Fig. 1) was carried out to a depth of 6 m using a 394 mm diameter chisel and the drilling was carried out with conventional 324 mm casing pipes Solidified outer diameter. Drilling was then continued with a 295 mm diameter bit to a depth of 300 mm while drilling with a drilling fluid of 1.1 g / cm 3 density and the drilling was consolidated with a 245 mm diameter conductor 2. Then the drilling was carried out using a chisel with a diameter of 215.9 mm to the projected depth of the drilling of 1800 m. Zone 3 of the water outlet was sealed at a depth of 460 to 470 m with profiled tubes 4, which without reducing the borehole diameter in an interval of 380 to 480 m by dressing the same with a pressure of 10 to 12 MPa of the liquid acting from the inside and Subsequent pressing by rolling was installed on the wall bottom of the borehole, which had previously been expanded to a diameter of 235 mm using a scraper.

Die Zonen 31 des Erdölaustrittes und des Wasseraustrittes wurden in einer Tiefe von 600 bis 640 m nach einem ähnlichen Verfahren abgedichtet. Die Profilrohre 41 wurden in einem Interwall von 534 bis 650 m eingebaut.Zones 3 1 of the oil outlet and the water outlet were sealed at a depth of 600 to 640 m using a similar procedure. The profile pipes 4 1 were installed in an interwall of 534 to 650 m.

Die Zone 311 des Wasseraustrittes wurde in einer Tiefe von 820 bis 840 m ebenfalls mittels der Profilrohre 411 in einem Intervall von 800 bis 900 m abgedichtet.Zone 3 11 of the water outlet was also sealed at a depth of 820 to 840 m by means of profile pipes 4 11 in an interval of 800 to 900 m.

Des weiteren wurde das Bohren mit Hilfe eines Meiβels mit 215,5 mm Durchmesser unter Verwendung einer Bohrspülung mit einer Dichte, die den geologischen Verhältnissen einer aufzuschließenden produktiven Schicht 5 entspricht, und zwar mit einer Dichte von 1,43 g/cm3, fortgesetzt- und und es wurde eine Förderrohrtour 6 mit einem Durchmesser von 146 mm eingebaut. In den Tiefen von 330 bis 800 m wurde unter Verwendung einer Bohrspülung mit einer Dichte von 1,29 g/cm3 und in der Tiefe von 800 bis 900 m - mit einer Dichte von 1,6 g/cm3 gebohrt.Furthermore, drilling was continued using a 215.5 mm diameter chisel using a drilling fluid with a density that corresponds to the geological conditions of a productive layer 5 to be digested, namely with a density of 1.43 g / cm 3 . and and a conveyor tube tour 6 with a diameter of 146 mm was installed. M in the depths of 330-800 of a drilling fluid having a density of 1.29 g / cm 3 and at the depth of 800 m was up to 900 using - at a density of 1, 6 g / cm 3 drilled.

Auf diese Weise wurde die Abdichtung der Komplikationszonen 3, 31, 311 je nach dem Aufschluß derselben durch den Einbau der Profilrohrtouren 4, 4I und 4II durchgeführt, deren Gesamtlänge 266 m betrug.In this way, the complication zones 3, 3 1 , 3 11 were sealed, depending on the digestion thereof, by installing profile tube tours 4, 4 I and 4 II , the total length of which was 266 m.

Beim Aufschluβ einer Schicht 7 (Fig. 2, 3) mit einem anomal hohen Lagerstättendruck werden die Enden des mittleren Profilrohres 4 in der Zone der Schicht 7 mit Packerelementen 3 versehen und mit dem unteren Profilrohr 4, das mit einem Schuh 9 versehen ist, sowie mit dem oberen Profilrohr 4 verbunden, das ein linksgängiges Anschluβgewinde 10 an seinem oberen Ende aufweist.When a layer 7 (FIGS. 2, 3) is disrupted with an abnormally high deposit pressure, the ends of the central profile tube 4 in the zone of the layer 7 are provided with packer elements 3 and with the lower profile tube 4, which is provided with a shoe 9, and connected to the upper profile tube 4, which has a left-hand connection thread 10 at its upper end.

Der Satz von Profilrohren 4 wird an einem Bohrgestänge 11 bis zur Komplikationszone 7 mit einem anomal hohen Lagerstättendruck eingebaut, so daβ dieser Zone 7 gegenüber der mittlere zu verfestigende Teil 3 des Profilrohres untergebracht wird, wobei der Durchmesser des Umkreises desselben um 3 bis 5% kleiner als der Bohrlochdurchmesser in der vorher erweiterten Zone 7 ist, während der Durchmesser des unteren und des oberen Teil des Satzes von Rohren 4 dem Durchmesser des erweiterten Teils der Bohrung in der Komplikationszone 7 gleich ist.The set of profile tubes 4 is installed on a drill pipe 11 up to the complication zone 7 with an abnormally high deposit pressure, so that this zone 7 is accommodated in relation to the central part 3 of the profile tube to be solidified, the diameter of the circumference thereof being 3 to 5% smaller than the borehole diameter in the previously enlarged zone 7, while the diameter of the lower and the upper part of the set of pipes 4 is equal to the diameter of the enlarged part of the hole in the complication zone 7.

Nach dem Einbau des Satzes von Profilrohren 4 in die Komplikationszone 7 wird im Innenraum dieser Rohre ein überdruck durch Einpressen einer Flüssigkeit mit Hilfe z. B. einer Spülpumpe oder eines Zementieraggregates erzeugt; unter der Wirkung dieses Überdruckes vollziehen sich das Abrichten und die Fixierung des Oberteils und des Unterteils des Satzes von Rohren 4. Der mittlere Teil des Rohres 4, der abgerichtet wird, reicht dabei bis zum Durchmesser des erweiterten Teils der Bohrung um 3 bis 5 % nicht. Dann wird die Druckentlastung vorgenommen, das Bohrgestänge 11 wird von dem oberen Profilrohr 4 abgeschraubt und ausgebaut. Anschließend wird an dem Bohrgestänge 11 eine Aufwalzvorrichtung 12 (Fig. 3) eingefahren und, angefangen vom oberen Teil, werden die Profilrohre 4 aufgewalzt; dadurch werden das obere und das untere Rohr 4 kalibriert, während das mittlere Rohr bis zu einem Durchmesser aufgewalzt wird, der den Durchmesser dieses Rohres vor dem Profilieren um 3 bis 5 % übersteigt.After installation of the set of profile tubes 4 in the complication zone 7, an excess pressure is created in the interior of these tubes by injecting a liquid with the aid of e.g. B. a irrigation pump or a cementing unit; under the effect of this overpressure, the dressing and the fixation of the upper part and the lower part of the set of pipes 4 take place. The middle part of the pipe 4, which is dressed, does not reach the diameter of the enlarged part of the bore by 3 to 5% . Then the pressure relief is carried out, the drill pipe 11 is unscrewed from the upper profile tube 4 and removed. Then a roll is made on the drill pipe 11 device 12 (Fig. 3) retracted and, starting from the upper part, the profile tubes 4 are rolled; as a result, the upper and lower tubes 4 are calibrated, while the middle tube is rolled up to a diameter which exceeds the diameter of this tube by 3 to 5% before profiling.

Dabei wird das mittlere Rohr 4 aufgeweitet und dicht an die Bohrlochwandungen angedrückt, während die Packerelemente 8 die abzudichtende Zone 7 der Bohrung von dem übrigen Teil derselben (Fig. 3, 4) trennt. Zum Abschluβ der Kalibrierungsstufe des unteren Profilrohres 4 wird von diesem Rohr der Schuh 9 gelöst.The middle tube 4 is expanded and pressed tightly against the borehole walls, while the packer elements 8 separate the zone 7 of the bore to be sealed from the rest of the same (FIGS. 3, 4). At the end of the calibration stage of the lower profile tube 4, the shoe 9 is released from this tube.

Bei Aufwalzen der Innenfläche des mittleren. Rohres 4 der Profilrohrtour 4 vollzieht sich seine Verformung in radialer Richtung, was zu einer Metallverfestigung führt, die in einer Erhöhung der Metallhärte zum Ausdruck kommt. Der Härtezuwachs beträgt in Abhängigkeit von der Stahlsorte und der Wanddicke 130 bis 260 %.When rolling the inner surface of the middle. The tube 4 of the profile tube tour 4 is deformed in the radial direction, which leads to a metal hardening, which is expressed in an increase in the metal hardness. The increase in hardness is 130 to 260% depending on the type of steel and the wall thickness.

Gewerbliche VerwertbarkeitCommercial usability

Die Erfindung kann . zur überdeckung von Schichten mit anomalen Lagerstättendrücken sowie zur Uberdeckung der Zonen des Nachfallens von Gestein oder des Steinfalls in der Bohrung und der Komplikationszonen angewendet werden, die durch einen intensiven Spülungsverlust, Flüssigkeits- oder Gasdurchflüsse aus aufgeschlossenen Schichten gekennzeichnet sind, welche sich mit vorhandenen Mittels nicht abdichten lassen.The invention can. to cover layers with abnormal deposit pressures as well as to cover the zones of rock or rock fall in the well and the complication zones, which are characterized by an intensive flushing loss, liquid or gas flows from disrupted layers, which are not possible with existing agents have it sealed.

Claims (3)

1. Verfahren zum Bau einer Bohrung, welches das Bohren von Gesteinen, deren Verfestigung mit einer Leitrohrtour (1), einem Konduktor (2), einer Förderrohrtour (6) und die Abdichtung der Komplikationszonen (3) des Bohrens mit Profilrohren (4) einschließt, welche beim Einbau durch Erzeugung in diesen Profilrohren eines Druckgefälles und durch anschließendes Aufwalzen derselben aufgeweitet werden, dadurch gekennzeichnet , daß man das Bohren nach der Verfestigung der Bohrung mit der Leitrohrtour (1) und dem Konduktor (2) mittels eines Meißels ein und desselben Durchmessers durchführt, wobei die Komplikationszonen (3) bis .zu einem Durchmesser erweitert werden, der dem Außendurchmesser der aufgeweiteten Profilrohre (4) gleich ist, welche aufeinanderfolgend in alle Komplikationszonen (3) je nach dem Aufschluß derselben eingebaut werden.1. A method of constructing a bore, which includes the drilling of rocks, their consolidation with a guide tube tour (1), a conductor (2), a conveyor pipe tour (6) and the sealing of the complication zones (3) of the drilling with profile pipes (4) , which are expanded during installation by generating a pressure drop in these profiled tubes and then rolling them up, characterized in that after the bore has solidified with the guide tube tour (1) and the conductor (2), the drilling is carried out by means of a chisel of the same diameter is carried out, the complication zones (3) being widened to a diameter which is the same as the outside diameter of the widened profile tubes (4) which are successively installed in all the complication zones (3) depending on the digestion thereof. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß mindestens eines von den Profilrohren (4) vor dem Profilieren einen Auβendurchmesser hat, der kleiner als der Bohrlochdurchmesser in der Komplikationszone (3) ist, wobei bei der Aufweitung dieses Rohres (4) durch Aufwalzen sein Innendurchmesser auf den Innendurchmesser der anderen aufgewalzten Rohre (4) gebracht wird.2. The method according to claim 1, characterized in that at least one of the profile tubes (4) before profiling has an outer diameter which is smaller than the borehole diameter in the complication zone (3), with the expansion of this tube (4) by rolling its inner diameter is brought to the inner diameter of the other rolled tubes (4). 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet , daß man das Aufwalzen des Profilrohres (4) bis zu einem Durchmesser vornimmt, der seinen Durchmesser vor dem Profilieren um 3 bis 5 % übersteigt.3. The method according to claim 2, characterized in that one carries out the rolling of the profile tube (4) up to a diameter which exceeds its diameter before profiling by 3 to 5%.
EP89901623A 1988-01-21 1988-11-22 Method of constructing a well Expired - Lifetime EP0353309B1 (en)

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SU4366623 1988-01-21
SU884366623A SU1679030A1 (en) 1988-01-21 1988-01-21 Method of pit disturbance zones isolation with shaped overlaps
PCT/SU1988/000234 WO1989006739A1 (en) 1988-01-21 1988-11-22 Method of constructing a well

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US6561271B2 (en) 1999-05-20 2003-05-13 Baker Hughes Incorporated Hanging liners by pipe expansion
US6598677B1 (en) 1999-05-20 2003-07-29 Baker Hughes Incorporated Hanging liners by pipe expansion
US6631765B2 (en) 1999-05-20 2003-10-14 Baker Hughes Incorporated Hanging liners by pipe expansion
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NO893732L (en) 1989-09-19
CA1301635C (en) 1992-05-26
JPH02503097A (en) 1990-09-27
WO1989006739A1 (en) 1989-07-27
MX171802B (en) 1993-11-15
CN1034973A (en) 1989-08-23
CN1015808B (en) 1992-03-11
NO300986B1 (en) 1997-08-25
IN170723B (en) 1992-05-09
SU1679030A1 (en) 1991-09-23
HU890982D0 (en) 1990-12-28
US4976322A (en) 1990-12-11
EP0353309A4 (en) 1991-05-08
AU606777B2 (en) 1991-02-14
JP2530737B2 (en) 1996-09-04
EP0353309B1 (en) 1997-02-05
NO893732D0 (en) 1989-09-19
AU2939589A (en) 1989-08-11
DE3855787D1 (en) 1997-03-20
HUT57371A (en) 1991-11-28

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