EP0254900A2 - Stabilisateur pour train de tiges de forage - Google Patents

Stabilisateur pour train de tiges de forage Download PDF

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Publication number
EP0254900A2
EP0254900A2 EP87109543A EP87109543A EP0254900A2 EP 0254900 A2 EP0254900 A2 EP 0254900A2 EP 87109543 A EP87109543 A EP 87109543A EP 87109543 A EP87109543 A EP 87109543A EP 0254900 A2 EP0254900 A2 EP 0254900A2
Authority
EP
European Patent Office
Prior art keywords
stabilizer
envelope
stabilizer according
region
transition region
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.)
Granted
Application number
EP87109543A
Other languages
German (de)
English (en)
Other versions
EP0254900B1 (fr
EP0254900A3 (en
Inventor
Burley Glasscock
Clyde Walker
Haraldur Karlsson
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.)
Baker Hughes Oilfield Operations LLC
Original Assignee
Eastman Christensen Co
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
Priority claimed from US06/881,951 external-priority patent/US4729438A/en
Priority claimed from DE19863628265 external-priority patent/DE3628265A1/de
Application filed by Eastman Christensen Co filed Critical Eastman Christensen Co
Publication of EP0254900A2 publication Critical patent/EP0254900A2/fr
Publication of EP0254900A3 publication Critical patent/EP0254900A3/de
Application granted granted Critical
Publication of EP0254900B1 publication Critical patent/EP0254900B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
    • 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
    • E21B17/22—Rods or pipes with helical structure

Definitions

  • the invention relates to a stabilizer for deep drilling tools according to the preamble of patent claim 1.
  • Such a stabilizer is inserted at predetermined intervals in the deep drilling tool or its drill pipe string or arranged on it in order to be able to control the course of the drilling direction, to prevent the bit from drifting sideways and to increase the drilling performance by centering the bit about its axis of rotation. If it is a deep drilling tool with direct chisel drive, with which both directional drilling and straight drilling can be carried out, a distinction must be made between two operating phases, namely a directional drilling phase in which the stabilizer with its outer surfaces is moved longitudinally along the borehole wall without turning, and a straight drilling phase, in which the stabilizer is rotated in addition to the longitudinal displacement.
  • the stabilizer In order to obtain unimpeded passage of the flushing liquid flowing upwards in the borehole annulus, the stabilizer is provided on its periphery with stabilizer fins, the outer surfaces of which are in contact with the borehole wall only in a limited area of the enveloping surface and delimit flushing channels between them.
  • stabilizer fins In the case of inclined boreholes and the associated one-sided radial loading of the stabilizer, secure centering is achieved in that the stabilizer fins are of spiral design and thus offer a contact surface with the borehole wall in every rotational position of the stabilizer.
  • the spiral can be designed as a left or right-hand spiral.
  • the invention has for its object to provide a stabilizer of the type mentioned with spirally arranged stabilizer fins so that blocking of the stabilizer or removal of the formation is avoided when drilling the stabilizer in the borehole during drilling work.
  • the stabilizers shown in Figures 1 to 3 each have a base body 1, on the circumference of which several, e.g. three stabilizer fins or ribs 2 are arranged. These are designed in the form of a right-handed spiral and each delimit a mud channel 3 between them for the passage of mud liquid flowing upward in the borehole annulus.
  • the spiral shape of the stabilizer fins 2 ensures that there is contact between the stabilizer outer surfaces 4, the stabilizer fins 2 and the borehole wall in every rotational position of the stabilizer, be it that the outer surface 4 only one stabilizer fin 2 comes to rest against the borehole wall , be it that the outer surfaces 4 of the overlapping ends of two stabilizer fins 2 together form a contact surface.
  • the outer surface 4 of the stabilizer fins 2 has a main area 5 and one on a flushing channel Adjacent transition area 6.
  • the main area 5 is described by a rotationally symmetrical envelope 7, and the transition area 6 is drawn in or directed in relation to the envelope 7, that is to say toward the tool axis.
  • that edge area is formed which points in the direction 13 towards the bottom of the borehole. If the stabilizer is moved axially in the direction of the drilling progress without turning in the direction of arrow 13, the transition region 6 slides over the formation of the borehole wall without it being able to penetrate into the formation. This prevents the stabilizer from blocking or removing the formation.
  • FIGS. 5 to 7 For the formation of the transition area 6, three examples are illustrated in FIGS. 5 to 7.
  • the transition area 6 is kinked with respect to the main area 5 and runs flat, i.e. straight in the cross-sectional view.
  • the transition area 6 is shown as a curved surface, with a constant radius of curvature 8.
  • the transition area likewise forms a curved surface, but with a radius of curvature that becomes smaller towards the adjacent irrigation channel 3.
  • combinations of the three versions are also possible, or even courses that follow a different mathematical function, insofar as they are directed inwards.
  • the envelope 7 For use in directional drilling of boreholes, it can be expedient to give the envelope 7 a surface that deviates from the preferred cylindrical shape. Such configurations are expedient in which the envelope 7 extends at least to one end of the stabilizer, but preferably to both ends tapered, ie approximating the tool axis.
  • a stabilizer is designed so that the envelope 7 of the outer surfaces 4 of the stabilizer fins is cylindrical only in a central region 10 of the stabilizer, but is conical towards the ends of the stabilizer in regions 11 and 12.
  • the cone regions 11 and 12 can be designed symmetrically or, as shown in FIG. 2, asymmetrically.
  • Fig. 3 finally shows an envelope 7, which is spherical.
  • the envelope 7 has a combination of cylindrical, conical and spherical regions or also has another mathematical function, provided the envelope 7 tapers to at least one of the end regions.
  • a stabilizer is designed with such an envelope 7, it may be sufficient to provide the transition region 6 of the stabilizer fins 2 only in the middle and lower region 10, 12 of the stabilizer and to design the outer surface 4 in the entire width in a rotationally symmetrical manner, such as that is indicated in Fig. 2.
  • the contour of the stabilizer fins 2 results in a contour which may not only have simple cone regions at its ends, but instead also have more complex boundaries.
  • the stabilizer fin 2 which can be fastened to the base body 1 via a support body 14, is provided in the region of its upper end with a conical inclined surface 15, which has a partial region 16 of the outer surface 4 of the stabilizer fin that adjoins downward in the direction of the arrow 13 2 encloses an angle 17, which can be between 30 and 45 °.
  • This sub-area 16 of the outer surface 4 can be followed by a further sub-area 18 at a very acute angle, which includes a sub-area 16 with an angle 19 of 1 to 4 °, preferably 2 °.
  • a first lower inclined surface 20 extends to the partial region 18 at an angle 21 on the order of 6 to 15 °, and the first lower inclined surface 20 can merge into a second lower inclined surface 22 which forms an angle 23 of approximately 30 with the surface of the support body 14 up to 45 °.
  • the stabilizer fin 2 illustrated in FIG. 8 is provided with a coating 24 made of hard material, which extends only over the partial areas 16, 18 and 20 of the outer surface 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP87109543A 1986-07-03 1987-07-02 Stabilisateur pour train de tiges de forage Expired - Lifetime EP0254900B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US881951 1986-07-03
US06/881,951 US4729438A (en) 1986-07-03 1986-07-03 Stabilizer for navigational drilling
DE19863628265 DE3628265A1 (de) 1986-08-20 1986-08-20 Stabilisator fuer bohrgarnituren
DE3628265 1986-08-20

Publications (3)

Publication Number Publication Date
EP0254900A2 true EP0254900A2 (fr) 1988-02-03
EP0254900A3 EP0254900A3 (en) 1989-02-15
EP0254900B1 EP0254900B1 (fr) 1990-04-25

Family

ID=25846710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109543A Expired - Lifetime EP0254900B1 (fr) 1986-07-03 1987-07-02 Stabilisateur pour train de tiges de forage

Country Status (2)

Country Link
EP (1) EP0254900B1 (fr)
NO (1) NO872805L (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743843A1 (fr) * 1996-01-24 1997-07-25 D A T C Diamond And Tungsten C Outil de forage, notamment pour la realisation de forages petroliers
FR2747427A1 (fr) * 1996-04-15 1997-10-17 Elf Aquitaine Stabilisateur recompacteur pour le forage de puits petroliers
FR2824104A1 (fr) * 2001-04-27 2002-10-31 Smf Internat Element profile pour un equipement de forage rotatif et applications a des composants d'un train de tiges de forage
FR2997439A1 (fr) * 2012-10-30 2014-05-02 Vam Drilling France Dispositif stabilisateur pour garniture de fond de puits

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7571769B2 (en) 2007-02-23 2009-08-11 Baker Hughes Incorporated Casing window milling assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1521208A (fr) * 1967-04-28 1968-04-12 Reed International élément de stabilisation pour train de sondes de forage, ainsi que dispositif de stabilisation et procédé de forage résultant de ces éléments
US4396234A (en) * 1981-04-06 1983-08-02 Garrett William R Weldable blade stabilizer
CA1154430A (fr) * 1981-08-21 1983-09-27 Paul Knutsen Outil de foration a lame incorporee avec calibre cylindrique stabilisateur de l'effort de rognage
US4436158A (en) * 1981-12-15 1984-03-13 Carstensen Kenneth J Releasable drill string device and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1521208A (fr) * 1967-04-28 1968-04-12 Reed International élément de stabilisation pour train de sondes de forage, ainsi que dispositif de stabilisation et procédé de forage résultant de ces éléments
US4396234A (en) * 1981-04-06 1983-08-02 Garrett William R Weldable blade stabilizer
CA1154430A (fr) * 1981-08-21 1983-09-27 Paul Knutsen Outil de foration a lame incorporee avec calibre cylindrique stabilisateur de l'effort de rognage
US4436158A (en) * 1981-12-15 1984-03-13 Carstensen Kenneth J Releasable drill string device and method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743843A1 (fr) * 1996-01-24 1997-07-25 D A T C Diamond And Tungsten C Outil de forage, notamment pour la realisation de forages petroliers
WO1997027379A1 (fr) * 1996-01-24 1997-07-31 Datc Diamond And Tungsten Carbide S.A.R.L. Outil de forage
FR2747427A1 (fr) * 1996-04-15 1997-10-17 Elf Aquitaine Stabilisateur recompacteur pour le forage de puits petroliers
FR2824104A1 (fr) * 2001-04-27 2002-10-31 Smf Internat Element profile pour un equipement de forage rotatif et applications a des composants d'un train de tiges de forage
US6732821B2 (en) 2001-04-27 2004-05-11 S.M.F. International Profiled element for rotary drilling equipment and applications to components of a string of drill pipes
FR2997439A1 (fr) * 2012-10-30 2014-05-02 Vam Drilling France Dispositif stabilisateur pour garniture de fond de puits
WO2014067730A1 (fr) * 2012-10-30 2014-05-08 Vallourec Drilling Products France Dispositif stabilisateur pour ensemble de fond de trou

Also Published As

Publication number Publication date
EP0254900B1 (fr) 1990-04-25
EP0254900A3 (en) 1989-02-15
NO872805D0 (no) 1987-07-03
NO872805L (no) 1988-01-04

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