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WO1986004950A1 - Tige de forage pour realiser un train de tiges de forage - Google Patents

Tige de forage pour realiser un train de tiges de forage Download PDF

Info

Publication number
WO1986004950A1
WO1986004950A1 PCT/NO1986/000019 NO8600019W WO8604950A1 WO 1986004950 A1 WO1986004950 A1 WO 1986004950A1 NO 8600019 W NO8600019 W NO 8600019W WO 8604950 A1 WO8604950 A1 WO 8604950A1
Authority
WO
WIPO (PCT)
Prior art keywords
drilling
drilling pipe
tubes
drill string
ribs
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/NO1986/000019
Other languages
English (en)
Inventor
Henning Narum
Sigbjo^/rn SANGESLAND
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.)
Raufoss Ammunisjonsfabrikker AS
Original Assignee
Raufoss Ammunisjonsfabrikker AS
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 Raufoss Ammunisjonsfabrikker AS filed Critical Raufoss Ammunisjonsfabrikker AS
Publication of WO1986004950A1 publication Critical patent/WO1986004950A1/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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • 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

Definitions

  • Drilling pipe for making a drill string Drilling pipe for making a drill string.
  • the present invention relates to drilling pipes for making a drill string, in particular adapted to deviation drilling, i.e. drilling performed in such a manner that the drilling direction at the beginning is substantially vertical, while the direction is later changed towards one side, so that the direction of drilling finally is under a larger or smaller angle with the vertical direction, up to 90°.
  • Such drilling allows drilling into several mutually separate sources from one point , and is used for offshore drilling.
  • Deviation drilling causes, however, and in particular when the deviation angle from the vertical direction is large, problems with respect to transporting of the cuttings. Moreover, the friction against the bore hole becomes large, and the weight on the drill bit may be insufficient. Generally the weight of a conventional drill string will be a problem when the more or less horizontal portion of the bore hole has a large length.
  • a large deviation angle means that the cuttings have a short way to "fall” until they reach the "bottom” of the hole.
  • the weight of the drill string will generally be proportional to the frictional forces and frictional torques which occur between the drill string and the wall of the hole. In long holes having a large deviation angle said forces and torques will be of importance, and they will determine the possible length of drilling until the friction becomes too large.
  • the object of the present invention is to provide a drilling pipe which makes it possible to reduce the frictional forces and the frictional torques and which simultaneously keeps the pressure losses and the operational and handling conditions within acceptable limits.
  • the above has been achieved with a drilling pipe as specified in the accompanying claims.
  • a buoyancy which causes that the pressure of the drill string against the under side of a more or less horizontal portion of a hole is reduced.
  • the drilling pipe is made of an inner and an outer tube, and the inner tube has ribs which maintain the distance from the outer tube and contribute to prevent that the outer tube is squeezed together by the outer pressure.
  • At least the outer tube is helical.This brings about a reduction of the contact surface of the drill pipe against the wall of the hole and reduced problems related to friction between the drill string and the wall of the hole.
  • drilling pipes according to the invention does not have to comprise drilling pipes according to the invention,because these may be combined with drilling pipes without cavities for buoyancy.
  • Conventional drilling pipes may for instance be used during the first phase of the drilling, when the transporting of cuttings and the frictional forces are small problems, and drilling pipes according to the invention may be used in the area where the major deviation takes place.
  • the buoyance chamber or channels may be permanemtly closed, and the cross section of the chamber or the channels is of course adapted to the desired buoyancy, taking into account the weight of the drilling mud which determines the buoyancy per unit of volume.
  • Fig. 1 shows a longitudinal section through an originally straight drilling pipe according to the invention.
  • Fig.2 shows a cross section through a drilling pipe according to the invention.
  • Fig. 3 shows a longitudinal section through a drilling pipe according to the invention, in which the outer tube is of helical shape, while the inner tube primarily is straight.
  • the shown drilling pipes are sections which are adapted to form a drill string by being joined, and they may, as mentioned, provide a combination together with sections which have no cavities for buoyancy.
  • the drilling pipe shown in Fig.1 consists of an outer tube 1 and an inner tube 2, and said tubes are concentrical and are spaced radially by means of ribs 3.
  • a head 4,5 On each end of the drilling pipe is a head 4,5, which may have outer and inner threads, respectively, for screwing together of drilling pipes to form a string.
  • the tubes 1 and 2 may have cross sections as shown in Fig. 2, where the tube 1 has smooth walls while the tube 2 has outer ribs 3.
  • Fig.3 shows an embodiment where the outer tube 1 is of helical shape, while the inner tube 2 is straight.
  • the drilling pipe shown in Fig.3 has heads 4 and 3, in the same manner as the drilling pipe shown in Fig.1, and ribs 3 maintain the distance between the tubes 1 and 2. In this case, however, the ribs 3 have a height which varies with the distance between the tubes 1 and 2.
  • a not shown modification is a drilling pipe of which both the outer tube 1 and the inner tube 2 have helical shape.
  • the heads 4 and 5 may be of conventional type, and are not closer described.
  • the tubes 1 and 2 may be made of aluminium. It is theoretically possible to extrude the tubes 1 and 2 and the ribs 3 together, but because of the compression loading to which the tubes are subjected it is considered necessary to use heavily extrudable alloys , which makes it necessary to manufacture the tubes 1 and 2 separately, whereupon the tubes are joined. The joining may be performed in different ways, of which are mentioned:
  • Explosive technology for instance placing of a detonating fuse around the tube 1, whereby the detonation will press the ribs 3 into the wall of the tube 1.
  • the above processes may also be used when the outer tube is of helical shape, as shown in Fig.2. If both the tubes are of helical shape the inner tube must be screwed into the outer one after giving both the tubes their shape. Thereupon one of the above mentioned processes may be used. Alternatively the two tubes may be moved together in straight condition, whereupon they are given a helical shape.
  • a drilling pipe according to the invention contains a closed chamber or a plurality of channels which are closed against the exterior. There is no hindrance of providing mutually communicating channels, but grounds of manufacture make it most appropriate that the channels are separate.
  • the cavity or the channels for buoyanca may as mentioned contain air, but also other media can be used, such as a liquid or a more or less solid mass. Also another gas than air may be used.
  • the invention makes it possible , in particular when the mud weight is relatively high, to achieve a "positive" buoyancy. Compared with conventional drilling pipes o f aluminium the invention makes it possible to achieve a substantial weight reduction, for instance by a factor in the range of 3, and relatively to conventional drilling pipes of steel there may be achieved a weight reduction by a factor in the range o f 7 ( I . e . approximately 1 /3 and 1 /7 , respectively, of the weight of conventional drilling pipes ) .
  • the joining of the tubes 1 and 2 and the heads 4 and 3 may be performed in any suitable manner. As examples are mentioned threaded connections and welding.
  • the inner tube which is adapted to convey mud, of course communicates with apertures in the heads 4 and 5, in such a manner that a plurality of joined drilling pipes constitute a string having a continuous inner channel.
  • the tubes 1 and 2 must be designed for the prevailing pressures, they must also be designed to withstand the bending which necessarily occurs during deviated drilling, and the tubes must furthermore be designed to withstand the axial forces and the torque to which they are subjected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

Une tige de forage pour réaliser un train de tiges de forage, en particulier un forage dévié, comprend un tube extérieur et un tube intérieur (2) connectés à des têtes (4, 5) à chaque extrémité de telle manière que le tube intérieur communique avec des ouvertures aménagées au travers de chaque tête, et de telle manière qu'une cavité fermée est formée entre les tubes (1, 2), ladite cavité contribuant à donner à la tige de forage et au train de tiges de forage une flottabilité dans le trou de forage.
PCT/NO1986/000019 1985-02-21 1986-02-21 Tige de forage pour realiser un train de tiges de forage Ceased WO1986004950A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO850689 1985-02-21
NO850689 1985-02-21

Publications (1)

Publication Number Publication Date
WO1986004950A1 true WO1986004950A1 (fr) 1986-08-28

Family

ID=19888133

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1986/000019 Ceased WO1986004950A1 (fr) 1985-02-21 1986-02-21 Tige de forage pour realiser un train de tiges de forage

Country Status (2)

Country Link
EP (1) EP0211925A1 (fr)
WO (1) WO1986004950A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226583A (en) * 1988-12-30 1990-07-04 Shell Int Research Method of placing a pipe string in a borehole and pipe section for use in the method
EP0532324A1 (fr) * 1991-09-13 1993-03-17 Inco Limited Tige de forage avec tube interne dans le trou
EP0580271A3 (fr) * 1992-07-24 1994-05-04 Charles Machine Works
US5713423A (en) * 1992-07-24 1998-02-03 The Charles Machine Works, Inc. Drill pipe
WO1998032951A3 (fr) * 1997-01-28 1998-10-01 Wirth Co Kg Masch Bohr Procede et dispositif pour forer des sondages, notamment des sondages de recherche et d'extraction
WO2002012773A1 (fr) * 2000-08-08 2002-02-14 Oil States Industries (Uk) Ltd Ensemble tuyaux
WO2018046757A3 (fr) * 2016-09-12 2018-04-19 Koegler Ruediger Forage directionnel étendu
GB2566779A (en) * 2017-05-03 2019-03-27 Hunting Energy Services Inc One piece forged fludic displacement drill pipe and method of manufacture thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1024310A (en) * 1911-10-14 1912-04-23 Roger H Canfield Apparatus for boring wells.
DE816464C (de) * 1942-11-08 1951-10-11 Wieland Werke Ag Metallisches Hohlmantelrohr
US3552779A (en) * 1968-05-31 1971-01-05 Homer I Henderson Dual-conduit drill pipe for earth boring
US3786878A (en) * 1970-08-25 1974-01-22 H Sherman Dual concentric drillpipe
GB1461003A (en) * 1973-08-29 1977-01-13 Bakerdrill Inc Dual concentric drill pipe
DE3239342A1 (de) * 1982-10-23 1984-04-26 Schmidt, Kranz & Co GmbH Zweigniederlassung Zorge, 3421 Zorge Bohrgestaenge
CA1191454A (fr) * 1983-01-19 1985-08-06 Harold F. Jarvis Structure tubulaire isolee

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1024310A (en) * 1911-10-14 1912-04-23 Roger H Canfield Apparatus for boring wells.
DE816464C (de) * 1942-11-08 1951-10-11 Wieland Werke Ag Metallisches Hohlmantelrohr
US3552779A (en) * 1968-05-31 1971-01-05 Homer I Henderson Dual-conduit drill pipe for earth boring
US3786878A (en) * 1970-08-25 1974-01-22 H Sherman Dual concentric drillpipe
GB1461003A (en) * 1973-08-29 1977-01-13 Bakerdrill Inc Dual concentric drill pipe
DE3239342A1 (de) * 1982-10-23 1984-04-26 Schmidt, Kranz & Co GmbH Zweigniederlassung Zorge, 3421 Zorge Bohrgestaenge
CA1191454A (fr) * 1983-01-19 1985-08-06 Harold F. Jarvis Structure tubulaire isolee

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226583A (en) * 1988-12-30 1990-07-04 Shell Int Research Method of placing a pipe string in a borehole and pipe section for use in the method
EP0532324A1 (fr) * 1991-09-13 1993-03-17 Inco Limited Tige de forage avec tube interne dans le trou
EP0580271A3 (fr) * 1992-07-24 1994-05-04 Charles Machine Works
US5713423A (en) * 1992-07-24 1998-02-03 The Charles Machine Works, Inc. Drill pipe
WO1998032951A3 (fr) * 1997-01-28 1998-10-01 Wirth Co Kg Masch Bohr Procede et dispositif pour forer des sondages, notamment des sondages de recherche et d'extraction
US6484820B1 (en) 1997-01-28 2002-11-26 Wirth Maschinen-Und Bohrgeraete Fabrik Gmbh Method and device for driving bore-holes, especially in the sea bed, using a guide tip
WO2002012773A1 (fr) * 2000-08-08 2002-02-14 Oil States Industries (Uk) Ltd Ensemble tuyaux
WO2018046757A3 (fr) * 2016-09-12 2018-04-19 Koegler Ruediger Forage directionnel étendu
GB2566779A (en) * 2017-05-03 2019-03-27 Hunting Energy Services Inc One piece forged fludic displacement drill pipe and method of manufacture thereof
US10407996B2 (en) 2017-05-03 2019-09-10 Hunting Energy Services, Inc. One piece forged fluidic displacement drill pipe and method of manufacture thereof
GB2566779B (en) * 2017-05-03 2022-03-30 Hunting Energy Services Inc Fluidic displacement drill pipe assembly and method of manufacture thereof

Also Published As

Publication number Publication date
EP0211925A1 (fr) 1987-03-04

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