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WO2011044689A1 - Connexion filetée hermétique de tiges de forage ou de tubes de revêtement dans un tubage technique pour la prospection géologique d'un puits de forage - Google Patents

Connexion filetée hermétique de tiges de forage ou de tubes de revêtement dans un tubage technique pour la prospection géologique d'un puits de forage Download PDF

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Publication number
WO2011044689A1
WO2011044689A1 PCT/CA2010/001629 CA2010001629W WO2011044689A1 WO 2011044689 A1 WO2011044689 A1 WO 2011044689A1 CA 2010001629 W CA2010001629 W CA 2010001629W WO 2011044689 A1 WO2011044689 A1 WO 2011044689A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool joint
thread
tapered
connection
joint pin
Prior art date
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.)
Ceased
Application number
PCT/CA2010/001629
Other languages
English (en)
Inventor
Yuri Konstantinovich Nizienko
Victor Belilovskiy
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.)
KAI SERVICES Inc
Original Assignee
KAI SERVICES Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KAI SERVICES Inc filed Critical KAI SERVICES Inc
Publication of WO2011044689A1 publication Critical patent/WO2011044689A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • 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
    • E21B17/02—Couplings; joints
    • E21B17/08—Casing joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
    • F16L15/004—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with axial sealings having at least one plastically deformable sealing surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/06—Screw-threaded joints; Forms of screw-threads for such joints characterised by the shape of the screw-thread

Definitions

  • Embodiments of this invention relate to the field of geological prospecting, in particular to hermetic tapered threaded connections for tubular structures (sections) in the construction of drilling strings and/or casing strings used to drill geological prospecting wells in order to study the Earth's crust to determine the presence of useful minerals.
  • embodiments of the invention relate to a tapered threaded connection, containing means for changing the direction of load on the thread as well as a number of independent seals that are sensitive to external stimuli (pressure), spaced in the axial direction relative to the seal, which is formed by direct mutual engagement of the structural profile elements of the thread, with the aim of insulating the thread from the effects of the fluid medium both inside the pipe channel, as well as from the outer surface of the connected tubular structures.
  • the task of sealing tapered threaded connections can be reduced essentially to their compaction by some means or other, that is, it consists of the task of closing off along the sections in any area of the threaded connection the apertures of the four channels of leakage, namely:
  • a tapered tool joint pin with a threaded part positioned in the central region of its outer tapered surface, by an axially directed projection with a smooth sealing outer surface, which is physically a continuation of the threaded part and is formed within the diameter of the valleys of the smaller diameter thread, as well as with a bearing sealing shoulder, radially extending in the direction of the periphery with respect to the threaded part on the side of its larger diameter and axially distanced with respect to the threaded part by the magnitude of the axially directed section with a smooth sealing outer surface, which is physically a continuation of the threaded part and is formed within the diameter of the peaks of said thread in this zone;
  • the profiles of the thread in the tapered threaded interlocking connection are similar figures in the form of unequal sided trapezoids, principally, with rounded vertices, while contact in the operational state of the connection is carried out along the relatively steep lateral bearing surfaces of the thread, oriented at a negative angle relative to the perpendicular to the axis of the connection, the gently sloping lateral fixed surfaces are spatially distanced with a relative gap;
  • the height of the profile elements, that is, the peaks and valleys, of the tapered tool joint pin exceeds the height, in the operational state of the connection, of the profile elements of the thread of the tool joint box (US, No. 5,788,401 , 1998).
  • the claimed technical solution was based on the challenge of improving the lifetime of the pipe in its operational condition and the reliability of the connection to adjoining pipes, while ensuring optimal conditions for performing repeated assembly and disassembly without damaging the integrity (quality) of the engaged sealing surfaces.
  • the technical result is an increase in the hermeticity of the tapered threaded connection and the provision of even distribution of workload over all the turns of the thread in the process of employment in order to improve the durability and reliability of the combined technological system as a whole.
  • the delivered technical result (according to the first embodiment of the invention) is achieved by there being in the hermetic threaded connection of the drill or casing pipes in the technical casing for the drilling of geological prospecting wells, having a through channel, the diameter of which corresponds to the inner diameter of the casing, and includes the following, directly executed on the engaging ends of the pipes:
  • a tapered tool joint pin with a threaded part positioned in the central region of its outer tapered surface, by an axially directed projection with a smooth sealing outer surface, which is physically a continuation of the threaded part and is formed within the diameter of the valleys of the smaller diameter thread, as well as with a bearing sealing shoulder, radially extending in the direction of the periphery with respect to the threaded part on the side of its larger diameter and axially distanced with respect to the threaded part by the magnitude of the axially directed section with a smooth sealing outer surface, which is physically a continuation of the threaded part and is formed within the diameter of the peaks of said thread in this zone;
  • a tool joint box structurally organized with the possibility of screwing into it the tapered tool joint pin, with the formation of a tapered threaded interlocking connection in the central region of its inner tapered surface, which on the side of the box thread with the smaller diameter is transformed into an axially directed section with a smooth sealing inner surface formed within the diameter of the peaks of the thread in this zone, which is bounded by a shoulder radially directed toward the axis of the connection, while on the side of the larger diameter thread said surface is transformed into an axially directed section with a smooth sealing inner surface, formed within the diameter of the valleys of the thread in this zone and bound by the bearing end surface of the box, engaged with the matching surface of the bearing shoulder of the tapered tool joint pin at an angle to the axis of connection with the formation of a tapered surface of engagement with the vertex, turned in an axially opposite direction to the direction of drilling;
  • the geometrical parameters of the opposite engaging sealing surfaces of the tapered tool joint pin and tool joint box are chosen from the conditions for providing in the engagements an inter-metallic sealing interaction in the process of tightening the connection;
  • the height of the profile elements, that is, the peaks and valleys, of the tapered tool joint pin exceeds the height (in the operational state of the connection) of the matching profile elements of the thread of the tool joint box.
  • the delivered technical result (according to the second embodiment of the invention) is achieved by there being in the hermetic threaded connection of the drill or casing pipes in the technical casing for the drilling of geological prospecting wells, having a through channel, the diameter of which corresponds to the inner diameter of the casing, and includes the following, directly executed on the engaging ends of the pipes:
  • a threaded tool joint pin with a threaded part positioned in the central region of its outer tapered surface, by an axially directed projection with a smooth sealing outer surface, which is physically a continuation of the threaded part and is formed within the diameter of the valleys of the smaller diameter thread, as well as with a bearing sealing shoulder, radially extending in the direction of the periphery with respect to the threaded part on the side of its larger diameter and axially distanced with respect to the threaded part by the magnitude of the axially directed section with a smooth sealing outer surface, which is structurally an extension of the threaded part and formed within the diameter of the peaks of said thread in this zone;
  • the geometrical parameters of the opposite engaging sealing surfaces of the tapered tool joint pin and tool joint box are chosen from the conditions for providing in the engagements an inter-metallic sealing interaction in the process of tightening the connection;
  • the height of the profile elements that is, the peaks and valleys, of the thread of the tool joint box exceeds the height of the matching, in the operational state of the connection, profile elements of the tapered tool joint pin.
  • the delivered technical result (according to the third embodiment of the invention) is achieved by there being in the hermetic threaded connection of the drill or casing pipes in the technical casing for the drilling of geological prospecting wells, having a through channel, the diameter of which corresponds to the inner diameter of the casing, and includes the following, directly executed on the engaging ends of the pipes:
  • a threaded tool joint pin with a threaded part positioned in the central region of its outer tapered surface, by an axially directed projection with a bearing end and a smooth sealing outer surface, which is physically a continuation of the threaded part and is formed within the diameter of the valleys of the smaller diameter thread, and also with a shoulder radially extending in the direction of the periphery with respect to the threaded part on the side of its larger diameter and axially distanced with respect to the threaded part by the magnitude of the axially directed section with a smooth sealing outer surface, which is physically a continuation of the threaded part and is formed within the diameter of the peaks of said thread in this zone;
  • a tool joint box structurally organized with the possibility of screwing into it a tapered pin to form a tapered threaded interlocking connection in the central region of the inner tapered surface, which on the side of the box thread with the smaller diameter is transformed into an axially directed section with a smooth sealing inner surface formed within the diameter of the peaks of the thread in this zone, which is bounded by a bearing shoulder radially directed towards the axis of the connection, while on the side of the larger diameter thread said surface is transformed into an axially directed section with a smooth sealing inner surface, formed within the diameter of the valleys of the thread in this zone, bounded by the end surface, spatially separated from the opposite surface of the shoulder of the tapered tool joint pin by means of a gap;
  • the geometrical parameters of the opposite engaging sealing surfaces of the tapered tool joint pin and tool joint box are chosen from the conditions for providing in the engagements an inter-metallic sealing interaction in the process of tightening the connection;
  • the profiles of the thread in the tapered threaded interlocking connection are similar figures in the form of unequal sided trapezoids with rounded apexes, while contact in the operational state of the connection is carried out along the relatively steep lateral bearing surfaces of the thread, oriented at a negative angle relative to the perpendicular to the axis of the connection, while the gently sloping oppositely-positioned lateral fixed surfaces are spatially arranged with a relative gap; and [0049] - while the height of the profile elements, that is, the peaks and valleys, of the tapered tool joint pin exceeds the height, in the operational state of the connection, of the profile elements of the thread of the tool joint box.
  • the matching surfaces of the bearing shoulder of the box and the bearing end of the tapered tool joint pin are spatially oriented at an angle to the axis of the connection to form a tapered surface of engagement with the vertex turned in an axially opposite direction to the direction of drilling of the well.
  • the delivered technical result (according to the fourth embodiment of the invention) is achieved by there being in the hermetic threaded connection of the drill or casing pipes in the technical casing for the drilling of geological prospecting wells, having a through channel, the diameter of which corresponds to the inner diameter of the casing, and includes the following, directly executed on the engaging ends of the pipes:
  • a threaded tool joint pin with a threaded part positioned in the central region of its outer tapered surface, by an axially directed projection with a bearing end and a smooth sealing outer surface, which is physically a continuation of the threaded part and is formed within the diameter of the valleys of the smaller diameter thread, and also with a shoulder radially extending in the direction of the periphery with respect to the threaded part on the side of its larger diameter and axially distanced with respect to the threaded part by the magnitude of the axially directed section with a smooth sealing outer surface, which is physically a continuation of the threaded part and is formed within the diameter of the peaks of said thread in this zone;
  • the geometrical parameters of the opposite engaging sealing surfaces of the tapered tool joint pin and tool joint box are chosen from the conditions for providing in the engagements an inter-metallic sealing interaction in the process of tightening the connection;
  • the profiles of the thread in the tapered threaded interlocking connection are similar figures in the form of unequal sided trapezoids with rounded apexes, while contact in the operational state of the connection is carried out along the relatively steep lateral bearing surfaces of the thread, oriented at a negative angle relative to the perpendicular to the axis of the connection, while the gently sloping oppositely-positioned lateral fixed surfaces are spatially arranged with a relative gap.
  • the height of the profile elements that is, the peaks and valleys, of the thread of the tool joint box exceeds the height of the matching, in the operational state of the connection, profile elements of the thread of the tool joint pin.
  • the engaged surfaces of the bearing shoulder of the box and the bearing end of the tapered tool joint pin are spatially oriented at an angle to the axis of the connection to form a tapered surface of engagement with the vertex turned in an axially opposite direction to the direction of drilling of the well.
  • section is positioned on the side of the smaller diameter thread of the tool joint box, that there are executed circular profiled grooves, which are functionally a means of changing the direction of load on the corresponding thread, while the maximum depth of said grooves, principally, exceeds the height of the profile of this thread.
  • Figure 2 is a detail view of point I in figure 1 (nodes of the radial and end seal, and also a means of changing the direction of the load on the threads in the form of a circular profiled groove on the upper section of the connection);
  • Figure 3 is a detail view of point II in figure 1 (node of the radial seal and a means of changing the direction of the load on the thread in the form of a circular profiled groove on the lower section of the connection);
  • Figure 4 is a detail view of point III in figure 1 (the geometry of the profile of the threaded connection);
  • Figure 5 is a general view of embodiment 2 of the claimed technical solution in operational state
  • Figure 6 is a detail view of point IV in figure 5 (nodes of the radial and end seal and also a means of changing the direction of the load on the threads in the form of a circular profiled groove on the upper section of the connection);
  • Figure 7 is a detail view of point V in figure 5 (node of the radial seal and a means of changing the direction of the load on the thread in the form of a circular profiled groove on the lower section of the connection);
  • Figure 8 is a detail view of point VI in figure 5 (the geometry of the profile of the threaded connection);
  • Figure 9 is a general view of the claimed technical solution for embodiment 3 in operational state
  • Figure 10 is a detail view of point VII of figure 9 (nodes of the radial and end seal and also a means of changing the direction of the load on the thread in the form of a circular profiled groove on the lower section of the connection);
  • Figure 11 is a detail view of point VIII in figure 9 (a node of the radial seal and also a means of changing the direction of the load on the thread in the form of a circular profiled groove on the upper section of the connection);
  • Figure 12 is a detail view of point IX in figure 9 (the geometry of the profile of the threaded connection);
  • Figure 3 is a general view of the claimed technical solution for embodiment 4 in operational state
  • Figure 14 is a detail view of point X in figure 13 (nodes of the radial and end seal and also a means of changing the direction of the load on the thread in the form of a circular profiled groove on the lower section of the connection);
  • Figure 15 is a detail view of point XI in figure 13 (a node of the radial seal and also a means of changing the direction of the load on the thread in the form of a circular profiled groove on the upper section of the connection); and
  • Figure 16 is a detail view of point XII of figure 13 (the geometry of the profile of the threaded connection).
  • 25 - groove (circular profiled, executed in the body of tool joint pin 1 , functionally serving as a means of changing the direction of load on the thread).
  • 26 - groove (circular profiled, executed in the body of the box, functionally serving as a means of changing the direction of load on the thread).
  • a hermetic threaded connection of drill or casing pipes in the technical casing for drilling geological prospecting wells having a through channel, the diameter of which corresponds to the inner diameter of the casing, and includes the following, directly executed on the engaging ends of the pipes:
  • a tapered tool joint pin 1 with a threaded part positioned in the central region of its outer tapered surface, by axially directed projection 2 with smooth sealing outer surface 3, which is physically a continuation of the threaded part and is formed within the diameter of the valleys of the smaller diameter thread, and also with an inclined sealing shoulder 4 (having a sealing surface 5), radially extending towards the periphery with respect to the threaded part along its larger diameter and axially distanced with respect to the threaded part by the magnitude of section 6 with a smooth sealing outer surface 7, which is physically a continuation of the threaded part and is formed within the diameter of the peaks of said thread in this zone;
  • the profiles of the thread in the tapered threaded interlocking connection are similar figures in the form of unequal sided trapezoids, principally, with rounded vertices, while in the operational state of the connection contact is carried out along the relatively steep lateral bearing surfaces 20 and 22 of the thread, oriented at a negative angle a with respect to the perpendicular to the axis 11 of the connection, the gently sloping lateral fixed surfaces 21 and 23 are spatially positioned with a relative gap 24;
  • sealing surfaces 3 and 7 of the tapered tool joint pin 1 and tool joint box 8 (sealing surfaces 10 and 14, respectively) to be executed in a cylindrical form.
  • the engaged surfaces of bearing shoulder 12 of box 8 and of the bearing end of tapered tool joint pin 1 are spatially oriented at an angle to the axis 1 1 of the connection to form tapered surface 17 of engagement with the apex 16, facing in an axially opposite direction 18 to the drilling of the well;
  • the height of the profile elements, that is, the peaks and valleys, of the thread of tool joint box 8 exceeds the height of the matching (in the operational state of the connection) profile elements of the thread of tapered tool joint pin 1 .
  • connection eliminates the phenomenon of so-called "unwinding", that is, transverse deformation with an increase in the diameter of connected elements in the region of the bearing ends, which makes the connection less critical in exceeding the permissible torque and increases its reliability of use, and secondly, provides additional compression of the engaging sealing surfaces, forming radial nodes for the sealing of the connection.
  • unwinding that is, transverse deformation with an increase in the diameter of connected elements in the region of the bearing ends
  • additional compression of the engaging sealing surfaces forming radial nodes for the sealing of the connection.
  • the elements of the construction of the hermetic tapered threaded connection (formed on the basis of the claimed technical solution) can be produced industrially with the use of modern materials and technologies in enterprises producing components of technical casings (both drilling and casing) for drilling geological prospecting wells.
  • the object embodying the claimed technical solution in its implementation is designed for geological exploration work and could be implemented as a hermetic tapered threaded connection of tubular structures (sections) in the construction of drilling and casing strings, used in the investigation of the earth's crust to determine the presence of useful minerals (more specifically, embodiments of the invention relate to a tapered threaded connection, which (the connection) contains several independent seals, which are sensitive to external stimuli (pressure) and spaced in the axial direction relative to the seal, formed directly by the mutual engagement of the profile elements of the thread with the aim of insulating it from the effects of fluid both inside the pipe channel, as well as outside the connected tubular structures); [0147] - for the claimed object in the form in which it is described in the claims, the possibility of its implementation is confirmed with the use of the means and methods mentioned above in the application or known in the prior art;

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Abstract

L'invention concerne, selon certains modes de réalisation, le domaine de la prospection géologique, notamment des connexions filetées coniques hermétiques pour structures tubulaires (sections) dans la construction de trains de tiges et/ou de colonnes de tubage utilisés pour forer des puits de prospection géologiques afin d'étudier l'écorce terrestre pour déterminer la présence de minéraux utiles.
PCT/CA2010/001629 2009-10-12 2010-10-12 Connexion filetée hermétique de tiges de forage ou de tubes de revêtement dans un tubage technique pour la prospection géologique d'un puits de forage Ceased WO2011044689A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2009139829 2009-10-12
RU2009139829 2009-10-12

Publications (1)

Publication Number Publication Date
WO2011044689A1 true WO2011044689A1 (fr) 2011-04-21

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PCT/CA2010/001629 Ceased WO2011044689A1 (fr) 2009-10-12 2010-10-12 Connexion filetée hermétique de tiges de forage ou de tubes de revêtement dans un tubage technique pour la prospection géologique d'un puits de forage

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4662659A (en) * 1983-01-17 1987-05-05 Hydril Company Tubular joint with trapped mid-joint metal-to-metal seal having unequal tapers
US4688832A (en) * 1984-08-13 1987-08-25 Hydril Company Well pipe joint
US4946201A (en) * 1989-03-08 1990-08-07 Baroid Technology, Inc. Oil field tubular connection
US4958862A (en) * 1988-10-03 1990-09-25 Dalmine Spa Hermetic metal pipe joint
US5788401A (en) * 1996-12-24 1998-08-04 Boart Longyear International Holdings, Inc. Rod joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4662659A (en) * 1983-01-17 1987-05-05 Hydril Company Tubular joint with trapped mid-joint metal-to-metal seal having unequal tapers
US4688832A (en) * 1984-08-13 1987-08-25 Hydril Company Well pipe joint
US4958862A (en) * 1988-10-03 1990-09-25 Dalmine Spa Hermetic metal pipe joint
US4946201A (en) * 1989-03-08 1990-08-07 Baroid Technology, Inc. Oil field tubular connection
US5788401A (en) * 1996-12-24 1998-08-04 Boart Longyear International Holdings, Inc. Rod joint

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