WO1993000500A3 - Variable depth grooved drill string member - Google Patents

Variable depth grooved drill string member Download PDF

Info

Publication number
WO1993000500A3
WO1993000500A3 PCT/US1991/003159 US9103159W WO9300500A3 WO 1993000500 A3 WO1993000500 A3 WO 1993000500A3 US 9103159 W US9103159 W US 9103159W WO 9300500 A3 WO9300500 A3 WO 9300500A3
Authority
WO
WIPO (PCT)
Prior art keywords
section
slip
inertia
bending moment
elevator
Prior art date
Application number
PCT/US1991/003159
Other languages
French (fr)
Other versions
WO1993000500A2 (en
Inventor
Thomas E Winship
Edmond I Balley
Original Assignee
Shaw Ind Ltd
Thomas E Winship
Edmond I Balley
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 Shaw Ind Ltd, Thomas E Winship, Edmond I Balley filed Critical Shaw Ind Ltd
Priority to EP91919444A priority Critical patent/EP0544835B1/en
Priority to CA002090758A priority patent/CA2090758C/en
Priority to PCT/US1991/003159 priority patent/WO1993000500A2/en
Priority to DE69121575T priority patent/DE69121575T2/en
Publication of WO1993000500A2 publication Critical patent/WO1993000500A2/en
Publication of WO1993000500A3 publication Critical patent/WO1993000500A3/en

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
    • E21B17/16—Drill collars
    • 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

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)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

An intermediate weight member (10) having a variable cross-section or bending moment of inertia as a function of member length is disclosed. At one end of the member (10) a slip and elevator section (14) is provided. A partially grooved section (16) of a diameter greater than that of the slip and elevator section extends between the slip and elevator section (24) and the other end of the member (10). The partially grooved section (16) includes two variable depth grooved sections (18, 20) separated by an ungrooved section (22). The ungrooved section (22) includes hardbanding rings (26, 28). The spiral grooves (30A, 30B, 30C) of variable depth grooved section (18, 20) vary in depth as a function of member length such that the bending moment of inertia varies as a function of length from the slip and elevator section (14) to the lower end of the member (10). Such variation changes from a constant bending moment of inertia at the slip and elevator section (14) to a substantially greater bending moment of inertia at the ungrooved section (22) and thence to a lower bending moment of inertia of a reduced diameter section (24) at its other end.
PCT/US1991/003159 1991-06-25 1991-06-25 Variable depth grooved drill string member WO1993000500A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP91919444A EP0544835B1 (en) 1991-06-25 1991-06-25 Variable depth grooved drill string member
CA002090758A CA2090758C (en) 1991-06-25 1991-06-25 Variable depth grooved drill string member
PCT/US1991/003159 WO1993000500A2 (en) 1991-06-25 1991-06-25 Variable depth grooved drill string member
DE69121575T DE69121575T2 (en) 1991-06-25 1991-06-25 Drill string element with a groove of variable depth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1991/003159 WO1993000500A2 (en) 1991-06-25 1991-06-25 Variable depth grooved drill string member

Publications (2)

Publication Number Publication Date
WO1993000500A2 WO1993000500A2 (en) 1993-01-07
WO1993000500A3 true WO1993000500A3 (en) 1993-02-18

Family

ID=22225514

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/003159 WO1993000500A2 (en) 1991-06-25 1991-06-25 Variable depth grooved drill string member

Country Status (4)

Country Link
EP (1) EP0544835B1 (en)
CA (1) CA2090758C (en)
DE (1) DE69121575T2 (en)
WO (1) WO1993000500A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2411253A1 (en) * 2001-04-26 2002-10-28 Furukawa Co., Ltd. Step tube rod, and drilling machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811800A (en) * 1987-10-22 1989-03-14 Homco International Inc. Flexible drill string member especially for use in directional drilling

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125173A (en) * 1964-03-17 Tubular drill string members
US4285407A (en) * 1979-12-17 1981-08-25 Samford Travis L Straight hole driller
US4460202A (en) * 1980-11-26 1984-07-17 Chance Glenn G Intermediate weight drill string member
FR2517357A1 (en) * 1981-11-27 1983-06-03 Smf Int Boring rod for ground working - is divided into three zones with centre having hard covering and shearing neck at top

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811800A (en) * 1987-10-22 1989-03-14 Homco International Inc. Flexible drill string member especially for use in directional drilling

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Mechanical Egineering Department, The Technological Institue, Northwestern University, "Design of Machine elements" Fifth Edition, 1978, M.F.SPOTTS see entire document. *
See also references of EP0544835A4 *

Also Published As

Publication number Publication date
CA2090758A1 (en) 1992-12-26
DE69121575T2 (en) 1997-03-13
EP0544835A4 (en) 1993-09-22
CA2090758C (en) 1998-07-28
WO1993000500A2 (en) 1993-01-07
DE69121575D1 (en) 1996-09-26
EP0544835A1 (en) 1993-06-09
EP0544835B1 (en) 1996-08-21

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