US3565187A - Gripping device - Google Patents

Gripping device Download PDF

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Publication number
US3565187A
US3565187A US859153A US3565187DA US3565187A US 3565187 A US3565187 A US 3565187A US 859153 A US859153 A US 859153A US 3565187D A US3565187D A US 3565187DA US 3565187 A US3565187 A US 3565187A
Authority
US
United States
Prior art keywords
housing
gripping
drill
piston element
drill string
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.)
Expired - Lifetime
Application number
US859153A
Other languages
English (en)
Inventor
Nils Gunnar Jonsson
John Arne Lagerstedt
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.)
Craelius AB
Original Assignee
Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
Application granted granted Critical
Publication of US3565187A publication Critical patent/US3565187A/en
Assigned to CRAELIUS AKTIEBOLAG reassignment CRAELIUS AKTIEBOLAG ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ATLAS COPCO AKTIEBOLAG
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
    • E21B17/02—Couplings; joints
    • E21B17/03—Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer
    • 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
    • E21B3/00—Rotary drilling
    • E21B3/02—Surface drives for rotary drilling

Definitions

  • a gripping device which is a part of a rock drill, is arranged to grip a drill string. It has a housing in which a number of gripping jaws are disposed around the drill string. In the housing but outside the jaws, a sleeve is clamped as a seal so that a pressure chamber is formed between the sleeve and the housing. When the pressure chamber is pressurized, the sleeve forces the jaws to grip the drill string.
  • This invention relates to a pressure fluid actuated gripping device which is a part of a rock or earth drilling apparatus for rotary drilling.
  • the gripping device is arranged so as to grip a drill string for transmitting rotation or axial movement to the drill string. It has a rotatable housing in which gripping jaws are disposed around the drill string.
  • elastomeric sleevelike piston element disposed in said housingto separate as a seal a pressure chamber between the housing and the piston element from a central space in the housing, and gripping jaws for gripping a drill string disposed around the drill string in said central space, said piston element being arranged to press the gripping jaws into firm engagement with the drill string when pressure fluid chamber.
  • FIG. 1 is a side view, partly in section, of a vertically arranged rock and earth drilling apparatus of which a gripping device according to the invention is an essential part;
  • FIG. 2 is a transverse section taken substantially along the line 2-2 in FIG. 1, some details of a feed bar being omitted;
  • FIG. 3 shows some details of FIG. 2 on a larger scale;
  • FIG. 4 is a section on a larger scale taken substantially along the line 4-4 in FIG. l, the gripping device, however, is shown in a section on the line 4-4 in FIG. 2;
  • FIG. 5 is a transverse section of a somewhat modified gripping device.
  • a reversible hydraulically operated rotary motor 46 is arranged to rotate the housing 22 of the chuck over a gearing which has gears 32, 33.
  • the gear 32 is attached to the output shaft of the motor 46 by means of a key 35
  • the gear 33 is attached to a projecting part of the housing 22 of the chuck 21 by means of another key 35.
  • a sleevelike piston element 35 made of an elastomer, e.g. rubber, has flanges 36 which are clamped against the housing 22 of the chuck 21 by means of an end cover 37 of the housing 22 and a circular spacer sleeve 38 which has holes 39.
  • a pressure fluid actuated gripping device arranged as a part of a rock drilling apparatus for rotary drilling and comprising a rotatably mounted housing having annular end parts for permitting the introduction of a drill string longitudinally through the housing, an elastomeric sleevelike piston element disposed in said housing to separate as a seal a pressure chamber between the housing-and the piston element from a central space in the housing, and gripping jaws for gripping a drill string disposed around the drill string in said central space, said piston element being arranged to press the gripping jaws into firm engagement with the drill string when pressure fluid is supplied to said pressure chamber.
  • a gripping device in which the housing is rotatable by means of a motor, and said gripping jaws are guided by means of guiding elements which are fixed to the housing and arranged to transmit torque from the housing to the gripping jaws when the housing is rotated.
  • a gripping device in which the gripping jaws are integral elements of a cylinder which is arranged to support substantially the whole interior surface of the sleevelike piston element when said pressure chamber is pressurized.

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)
US859153A 1968-10-04 1969-09-18 Gripping device Expired - Lifetime US3565187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE13475/68A SE324546B (en, 2012) 1968-10-04 1968-10-04

Publications (1)

Publication Number Publication Date
US3565187A true US3565187A (en) 1971-02-23

Family

ID=20297446

Family Applications (1)

Application Number Title Priority Date Filing Date
US859153A Expired - Lifetime US3565187A (en) 1968-10-04 1969-09-18 Gripping device

Country Status (9)

Country Link
US (1) US3565187A (en, 2012)
JP (1) JPS4827041B1 (en, 2012)
CH (1) CH519092A (en, 2012)
DE (1) DE1946734C2 (en, 2012)
FI (1) FI54733C (en, 2012)
FR (1) FR2019899A1 (en, 2012)
GB (1) GB1237859A (en, 2012)
NO (1) NO125201B (en, 2012)
SE (1) SE324546B (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0112811A3 (en) * 1982-12-27 1985-05-22 Craelius Ab Pressurized medium actuated gripping device
US4637477A (en) * 1984-02-03 1987-01-20 Craelius Ab Device in rock drilling machines
US6736219B1 (en) * 2002-12-10 2004-05-18 William A. White Underground horizontal boring apparatus
CN105156042A (zh) * 2015-08-18 2015-12-16 淮南矿业(集团)有限责任公司 液压钻机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0008477B1 (fr) * 1978-08-25 1982-04-07 DIAMANT BOART Société Anonyme Mandrin d'entraînement d'une tige de forage
FR2497869A1 (fr) * 1981-01-12 1982-07-16 Cogema Machine de forage montee sur vehicule et procede de forage utilisant une telle machine
GB2123328B (en) * 1982-05-15 1986-06-11 Mach Tool Engineers A hydraulic torque machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730331A (en) * 1953-01-19 1956-01-10 Peter J Harinck Rotary mining machine
US3212591A (en) * 1962-10-19 1965-10-19 Chicago Pneumatic Tool Co Diamond drilling apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730331A (en) * 1953-01-19 1956-01-10 Peter J Harinck Rotary mining machine
US3212591A (en) * 1962-10-19 1965-10-19 Chicago Pneumatic Tool Co Diamond drilling apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0112811A3 (en) * 1982-12-27 1985-05-22 Craelius Ab Pressurized medium actuated gripping device
US4643262A (en) * 1982-12-27 1987-02-17 Craelius Aktiebolag Pressurized medium actuated gripping device
AU567705B2 (en) * 1982-12-27 1987-12-03 Craelius A.B. Drill rod gripping device
US4637477A (en) * 1984-02-03 1987-01-20 Craelius Ab Device in rock drilling machines
EP0152385A3 (en) * 1984-02-03 1987-12-23 Craelius Ab A device in rock drilling machines
US6736219B1 (en) * 2002-12-10 2004-05-18 William A. White Underground horizontal boring apparatus
CN105156042A (zh) * 2015-08-18 2015-12-16 淮南矿业(集团)有限责任公司 液压钻机
CN105156042B (zh) * 2015-08-18 2017-07-25 淮南矿业(集团)有限责任公司 液压钻机

Also Published As

Publication number Publication date
SE324546B (en, 2012) 1970-06-08
FI54733B (fi) 1978-10-31
JPS4827041B1 (en, 2012) 1973-08-18
GB1237859A (en) 1971-06-30
DE1946734B1 (de) 1970-05-27
FI54733C (fi) 1979-02-12
DE1946734C2 (de) 1971-01-07
FR2019899A1 (en, 2012) 1970-07-10
NO125201B (en, 2012) 1972-07-31
CH519092A (de) 1972-02-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CRAELIUS AKTIEBOLAG, SUNDBYBERG, SWEDEN SWEDISH C

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ATLAS COPCO AKTIEBOLAG;REEL/FRAME:003844/0168

Effective date: 19801211