EP0286373A2 - Ring zur Sicherung des Bohrmeissels bei der Bergung von Bohrgestängeteilen - Google Patents

Ring zur Sicherung des Bohrmeissels bei der Bergung von Bohrgestängeteilen Download PDF

Info

Publication number
EP0286373A2
EP0286373A2 EP88303050A EP88303050A EP0286373A2 EP 0286373 A2 EP0286373 A2 EP 0286373A2 EP 88303050 A EP88303050 A EP 88303050A EP 88303050 A EP88303050 A EP 88303050A EP 0286373 A2 EP0286373 A2 EP 0286373A2
Authority
EP
European Patent Office
Prior art keywords
bit
hammer
retaining ring
ring
drill bit
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.)
Withdrawn
Application number
EP88303050A
Other languages
English (en)
French (fr)
Other versions
EP0286373A3 (de
Inventor
Jean-Paul Sauve
William Lawrie
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.)
Vale Canada Ltd
Original Assignee
Vale Canada Ltd
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 Vale Canada Ltd filed Critical Vale Canada Ltd
Publication of EP0286373A2 publication Critical patent/EP0286373A2/de
Publication of EP0286373A3 publication Critical patent/EP0286373A3/de
Withdrawn legal-status Critical Current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
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
    • E21B17/076—Telescoping joints for varying drill string lengths; Shock absorbers between rod or pipe and drill bit
    • 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
    • E21B17/06—Releasing-joints, e.g. safety joints
    • 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
    • E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers

Definitions

  • the instant invention relates to drilling in general and more particularly to an apparatus or a system for recovering drill string components within a hole.
  • hams, stabilizers and otherwise good drill pipe are relatively expensive commodities and to leave them in the ground is simply a waste of resources. For example, a hammer costs about 7000 (Canadian) and a five foot (1.5m) drill rod costs about 440 (Canadian).
  • drilling equipment components are often equipped with shear pins that are designed to break when predetermined maximum stresses are experienced by the equipment (usually rotational forces).
  • the pins are designed to shear thus freeing the component in question and preventing injury to personnel and damage to related components.
  • shear pins require a drilled hole to pass through and means for maintaining their position during normal (i.e., nonstressful) working situations. It is difficult to form a hole through a number of hardened drill components and maintain the alignment of the hole so as to allow the pin to bridge the various components. In addition, shear pins usually are not contemplated for equipment recovery purposes although that may be an unintended result.
  • drill bits are usually attached to a percussion hammer.
  • a steel bit retaining ring is disposed around the drill bit shank to maintain the drill bit within the hammer.
  • the ends of the splines on the drill bit act as stops against the ring as the bit is driven by the piston in the hammer to cause reciprocating percussive move­ment.
  • bit retaining ring having a predetermined shear strength registered with a drill bit.
  • the bit retaining ring is constructed to break upon a predetermined loading so as to allow for the recovery of selected components.
  • Figure 1 depicts the distal end 10 of a drill string.
  • a drill bit 12 is affixed to a percussion hammer 14 via threaded chuck 16.
  • the chuck 16 is threaded 20 to mate with lower extension 22 of the hammer 14 and maintain the position of the bit 12 within the hammer 14.
  • the shank 18 of the bit 12 includes a plurality of upper splines 24 that slide against support guide 26.
  • the support guide 26 is secured by ring 50.
  • Blow energy is imparted against the bit 12 by hammer piston 28.
  • Vertical reciprocating travel of the bit 12 is limited by the upper splines 24 and a plurality of lower splines 30 meeting breakaway bit retaining ring 32.
  • the ring 32 is disposed within the void 34 formed between the bottom of the support guide 26 and top of the chuck 16.
  • the bit retaining ring 32 is comprised of two half circles 32A and 32B of a preferably elastic material (such as nylon) having a predetermined maximum shear strength.
  • An O-ring 36 girdles the bit retaining ring 32 in groove 38 to assist in keeping the half circles 32A and 32B of the bit retaining ring 32 in place about the shank 18.
  • the ring 32 has flat upper and lower surfaces 40 and 42, canted upper and lower intermediate surfaces 44 and 46 and a shank registering surface 48 essentially perpendicular to the parallel upper and lower surfaces 40 and 42.
  • the canted upper intermediate surface 44 acts as a lower limit stop for the upper splines 24 and conversely the canted lower intermediate surface 46 acts as an upper limit stop for the lower splines 30.
  • the drill bit 12 is inserted into the chuck 16.
  • the two halves of the retaining ring 32 are placed about the shank 18 between the upper splines 24 and the lower splines 30 and held together and in place by the O-ring 36.
  • the bit-shank-ring assembly is then screwed into the extension 22 of the hammer 14.
  • Gasket 52 prevents dirt from entering the threads 20.
  • the hammer 14 is then affixed to a drill rod and ultimately to the drilling rig in the usual manner.
  • the expression "negatively applied load” means any affirmative load that ultimately tends to pull and separate the hammer away from the bit and away from the end of the hole.
  • drilling an object into a medium requires a positive load; withdrawing the object requires a negative load.
  • a negatively applied load would pull the components upwardly.
  • a negatively applied load would be in the down position.
  • the embodiment in Figure 1 is pictured in a downward direction.
  • a known negatively applied load may be applied to the entire drill string.
  • the negatively applied load will cause the hammer 14 to rise so that the upper splines 24 are brought into contact with the upper intermediate surface 44 of the bit retaining ring 32.
  • the bit retaining ring 32 will ultimately shear, thereby freeing the hammer 14 from the bit 12.
  • the hammer 14 will slide free of the bit 12.
  • the rod and hammer 14 circumscribing the chuck 16 can then be removed upwardly through the hole leaving only the bit 12 entombed in the hole.
  • the physical dimensions and the materials of the bit will, of necessity, be a function of the dimensions of the bit, hammer and contemplated drilling conditions.
  • a nylon bit retaining ring of about 4.5 inches (11.4 cm) outside diameter was about 0.63 inches (1.6 cm) thick and about 0.5 inches (1.3 cm) high was designed to shear when subjected to a pull of about 12 tons (107 kN) vertical pull.
  • a set of the rings 32 were installed on a high pressure hammer at the end of an in-the-hole drill. After having drilled 946 ough hard rock, the bit retaining ring 32 failed after drilling a breakthrough hole. As a consequence, it was determined that the bit retaining ring 32 may be designed to be somewhat thicker and stronger.
  • a negatively applied pull on the drill string may be engendered by any jacking device.
  • a twenty-four inch (61 cm) square base plate having a thickness of one inch (2.5 cm) and a central aperture was placed over a down hole with the rod extending through the aperture. The plate was carefully placed over the hole so as to be perpendicular to the drill string.
  • a hollow hydraulic jack with a clamp for securing the rod to the jack was energized to pull up on the rod.
  • a set of prototype nylon bit rings 32 successfully sheared at 20 tons (178 kN) of pull freeing the hammer 14 and associated rod.
  • the breakaway bit retaining ring 32 is designed and sized with the expectation that ultimately it may have to be affirmatively sheared, the ring 32 still must be strong enough to resist premature failure resulting from the typical stresses experienced during normal drilling operations.
  • the drill bit 12 and the hammer 14 are subjected to tremendous physical forces, heat, dirt, corrosive material, etc. Therefore, although the shear resistance of the breakaway bit retaining ring 32 is less than a conventional metallic ring, it still must exhibit sufficient physical resistance so that it will shear only when such a state-of-affairs is desired by the operator.
  • a weak ring 32 is worthless and an extremely strong one will only duplicate the properties of the prior art rings. Rather the shear strength of the ring should be selected to be: (1) greater than the typical shear experienced by the bit ring; (2) within the shear causing capabilities of the jack; and (3) less than the shear characteristics exhibited by prior art rings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP88303050A 1987-04-08 1988-04-06 Ring zur Sicherung des Bohrmeissels bei der Bergung von Bohrgestängeteilen Withdrawn EP0286373A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA534135 1987-04-08
CA534135 1987-04-08

Publications (2)

Publication Number Publication Date
EP0286373A2 true EP0286373A2 (de) 1988-10-12
EP0286373A3 EP0286373A3 (de) 1989-07-12

Family

ID=4135391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88303050A Withdrawn EP0286373A3 (de) 1987-04-08 1988-04-06 Ring zur Sicherung des Bohrmeissels bei der Bergung von Bohrgestängeteilen

Country Status (7)

Country Link
EP (1) EP0286373A3 (de)
JP (1) JPS63268895A (de)
AU (1) AU1432988A (de)
BR (1) BR8801655A (de)
FI (1) FI881622L (de)
ZA (1) ZA882413B (de)
ZW (1) ZW3688A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991009203A1 (en) * 1989-12-15 1991-06-27 Numa Tool Company Downhole drill bit and bit coupling
US6021856A (en) * 1998-05-29 2000-02-08 Numa Tool Company Bit retention system
US6070678A (en) * 1998-05-01 2000-06-06 Numa Tool Company Bit retention system
GB2378196A (en) * 2001-07-30 2003-02-05 Smith International Downhole release joint
GB2382090A (en) * 2001-11-16 2003-05-21 Varel International Inc Breakable washer for an earth boring bit
WO2005019594A1 (en) * 2003-08-13 2005-03-03 Baker Hughes Incorporated Releasable mill
US20120152521A1 (en) * 2011-02-28 2012-06-21 Akkerman Neil H Disconnect assembly for cylindrical members
CN103774998A (zh) * 2012-10-18 2014-05-07 张卫星 钻探用内芯可脱式钻头的内芯开启装置
CN115584939A (zh) * 2022-10-13 2023-01-10 贵州远东兄弟钻探有限公司 一种带有螺纹补偿功能的钻机加杆装置及其系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2423295C (en) * 2000-09-22 2009-05-12 Ingersoll-Rand Company Quick release drill bit for down-hole drills

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322216A (en) * 1964-11-18 1967-05-30 Ingersoll Rand Co Anvil for percussive drill
US3499664A (en) * 1968-07-29 1970-03-10 Bruns Tool Co Releasing collar
GB1419981A (en) * 1973-01-09 1976-01-07 Halifax Tool Co Ltd Percussion drills
GB1472501A (en) * 1975-01-13 1977-05-04 Gien Abraham Pneumatic percussive machines
US3945444A (en) * 1975-04-01 1976-03-23 The Anaconda Company Split bit casing drill
US4445572A (en) * 1981-08-17 1984-05-01 Baker International Corporation Unrestricted bore safety joint
DE3514030A1 (de) * 1985-04-18 1986-10-23 Hütte & Co. Bohrtechnik GmbH, 5960 Olpe Bohrvorrichtung, insbesondere zum rammbohren
FR2595404B1 (fr) * 1986-03-10 1988-07-08 Alsthom Raccord pour forage

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991009203A1 (en) * 1989-12-15 1991-06-27 Numa Tool Company Downhole drill bit and bit coupling
AU640992B2 (en) * 1989-12-15 1993-09-09 Numa Tool Company Downhole drill bit and bit coupling
US6070678A (en) * 1998-05-01 2000-06-06 Numa Tool Company Bit retention system
US6021856A (en) * 1998-05-29 2000-02-08 Numa Tool Company Bit retention system
US7198101B2 (en) 2001-07-30 2007-04-03 Smith International, Inc. Downhole release joint
GB2378196B (en) * 2001-07-30 2005-09-14 Smith International Downhole release joint
GB2378196A (en) * 2001-07-30 2003-02-05 Smith International Downhole release joint
GB2382090A (en) * 2001-11-16 2003-05-21 Varel International Inc Breakable washer for an earth boring bit
US6892832B2 (en) 2001-11-16 2005-05-17 Varel International, Ltd. Breakable washer earth boring bit
WO2005019594A1 (en) * 2003-08-13 2005-03-03 Baker Hughes Incorporated Releasable mill
US20120152521A1 (en) * 2011-02-28 2012-06-21 Akkerman Neil H Disconnect assembly for cylindrical members
US9512683B2 (en) * 2011-02-28 2016-12-06 Neil H. Akkerman Disconnect assembly for cylindrical members
CN103774998A (zh) * 2012-10-18 2014-05-07 张卫星 钻探用内芯可脱式钻头的内芯开启装置
CN115584939A (zh) * 2022-10-13 2023-01-10 贵州远东兄弟钻探有限公司 一种带有螺纹补偿功能的钻机加杆装置及其系统

Also Published As

Publication number Publication date
FI881622A0 (fi) 1988-04-07
JPS63268895A (ja) 1988-11-07
BR8801655A (pt) 1988-11-16
ZA882413B (en) 1988-09-28
EP0286373A3 (de) 1989-07-12
AU1432988A (en) 1988-10-13
FI881622A7 (fi) 1988-10-09
FI881622L (fi) 1988-10-09
ZW3688A1 (en) 1988-10-12

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