US3231318A - Drill steel centralizers - Google Patents

Drill steel centralizers Download PDF

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Publication number
US3231318A
US3231318A US201977A US20197762A US3231318A US 3231318 A US3231318 A US 3231318A US 201977 A US201977 A US 201977A US 20197762 A US20197762 A US 20197762A US 3231318 A US3231318 A US 3231318A
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US
United States
Prior art keywords
jaws
drill
gripping
disposed
pressure fluid
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
US201977A
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English (en)
Inventor
Ytterfors Sven Laurentius
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.)
Atlas Copco 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
Priority to US201977A priority Critical patent/US3231318A/en
Priority to GB20454/63A priority patent/GB960579A/en
Priority to ES288852A priority patent/ES288852A1/es
Priority to FI631196A priority patent/FI41525C/fi
Application granted granted Critical
Publication of US3231318A publication Critical patent/US3231318A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/24—Guiding or centralising devices for drilling rods or pipes

Definitions

  • This invention relates to rock drills and more particularly to an improved drill steel centralizer or guide of the type intended to provide a rigid support for the free end of the drill steel when starting a hole on an irregular work surface.
  • FIG. 1 shows a side view partly in section of a centralizer according to the invention and viewed substantially on lines 11 in FIG. 2.
  • FIG. 2 is a rear view of the centralizer in FIG. 1 with the guiding jaws closed for guiding a drill rod.
  • FIG. 3 shows extension drill steel members joined together into a fragmentarily illustrated drill steel for long hole drilling and intended for use together with the drill steel centralizer according to the invention.
  • FIG. 4 is an enlarged fragmentary sectional View on line 44 in FIG. 2.
  • FIG. 5 is a sectional view on line 55 in FIG. 1 with the guiding jaws opened.
  • FIG. 6 is an enlarged top view of the guiding jaws of the drill steel centralizer in FIGS. 1, 2 and 5.
  • FIG. 7 shows, on a still larger scale, a fragmentary view of the closed jaws in FIG. 2 accommodating and guiding a drill steel.
  • FIG. 8 is a view corresponding to FIG. 7, but showing the jaws in gripping engagement with a coupling sleeve forming part of the extension drill steel equipment in FIG. 3.
  • the drill centralizer consists of :a tubular body 18 having a hollow rear extension 11 which carries a stationary clamping jaw 12 extending longitudinally of the extension 11.
  • a bolt 13 having a nut 13 threaded thereon, extends through a transverse hole 14 in the extension 11 and the jaw 12 and carries loosely thereon a movable clamping jaw 15.
  • the lower portion of the jaw 15 contacts the extension 11 along a longitudinal surface 16 and by screwing the nut 13 the upper portion of the movable jaw 15 may be displaced in the direction of the stationary jaw 12 for firmly gripping between the jaws 12, 15 the front end of a feed bar or shell, not
  • the rock drill is of a type having means for reversing the drill rotation at will.
  • the rock drill also accommodates the adapter 17 of a per se well known extension drill steel equipment, FIG. 3, also incorporating a bit 18 and one extension unit or a string of a number of extension units each consisting of a drill rod 19 carrying a screwed on coupling sleeve 20.
  • the upper end of the tubular body 10 carries a transverse centrally open partly cylindrical plate 21 to the opposed ends of which there are aflixed one of the elements of a pair of power cylinder and piston means, preferably as shown the cylinder housing 22 of the cylinder elements
  • the housings 22 oppose each other and are aligned on a common axis.
  • the cylinder housings 22 are provided at their opposed remote ends with cylinder covers 23 which are kept tightly in place axially in widened end portions of the housings 22 by means of circular retaining rings 24 inserted in ring grooves 24 FIG. 4, in said end portions.
  • the opposite cylinder covers 25 face each other and are provided with coaxial eccentric collars 26 having bores therethrough provided on coinciding axes intersecting the drill axis of the rock dn'll on the feed bar.
  • the collars 26 are provided with linings 27.
  • pistons 28 having eccentric piston rods 29 tightly journalled in and protruding through the linings 27 in the direction of each other.
  • the throw of each piston 28 in its housing 22 is defined by the piston alternately contacting the cover 23 and the lining 27, respectively.
  • the faces of the pistons 28 remote from the piston rods are supplied with live pressure fluid via a conduit 30, FIG. 2, which extends along and at the outside of the plate 21 and interconnects radial bores 31, FIG. 4, in each cylinder housing 22 adjacent the cylindercover 23.
  • a nipple 32 containing a passage 33 therein is in communication with the conduit and a conduit 34 extending through 'the body 10 and extension 11 is connected to the nipple 32.
  • the faces of the pistons 28 adjacent the piston rods 29 are supplied with pressure fluid via a conduit 35 providing a connection between and through the cylinder covers 25, FIG. 5.
  • the conduit 35 communicates with and carries a nipple 36 having a passage 37 therein, which leads to a conduit 38 extending through the interior of the centralizer along the conduit 34.
  • control means for admitting pressure fluid to act alternately on opposed faces of the pistons 28.
  • the control means may for example consist of a four-way valve 39 by means of which alternatively one of the conduits 34 and 38 may be connected to a pressure fluid source indicated by the arrow 40 while the other is connected to the exhaust 41.
  • each piston rod end is provided with a bore 43 for accommodating a rear stem 44 on the jaws 42.
  • a bore 46 of reduced diameter in a Wall portion 46 centrally in the piston rod 29 Through the bore 46' extends a bolt threadedly connected to the stem 44 and firmly pressing the stem 44 against the wall portion 46.
  • Each composite jaw 42 has centrally therein a partly cylindrical middle portion 49 intended for guiding cooperation with the extension drill rods 19 and slightly larger in diameter than said rods.
  • the middle portion 49 extends between opposed conically stepped portions 58 and 51.
  • the jaws 42 are provided with enlarged partly cylindrical portions 52 and 53.
  • the upper and lower portion of the enlarged portions 52 and 53 are curved outwardly providing partly cylindrical gripping surfaces 54 intended for cooperation with the coupling sleeves 20 of the drill steel equipment, FIG. 8.
  • Each jaw 42 carries at one end thereof a lug '55 which protrude horizontally in the direction of the other cooperating jaw 42. In closed position of the jaws 42 these lugs 55. are received in notches 56 in each corresponding jaw 42.
  • the valve 39 Prior to drilling the fullfeed length the valve 39 is returned to the full line position in FIG. 1 for bringing the jaws 42 into a non-guiding position. Drilling is subsequentlyinterrupte-d .just before the forward end of the coupling sleeve 20 reaches the stepped portion 50 of the jaws 42, whereupon through turning of the valve 39 the jaws are again urged together, this time for firmly gripping and unrotatably locking the coupling sleeve 2% ⁇ by the aid of the surfaces .5 of the portions 52. Through reverse rotation of the drill the adapter 17 is now screwed out of the locked coupling sleeve 20, whereupon the drill and the adapter 17 are retracted in unison.
  • the next extension unit consisting of a drill rod 19 and a screwed on coupling sleeve 20 are then aligned between the adapter 17 and thelocked sleeve 20, whereupon through forward feeding and normal rotation of the drill the new drill steel unit will be screwed in the locked sleeve Ztland on the adapter 17.
  • the jaws 42 are now by means of the control valve 39 reopened to occupy non-guiding position and drilling may proceed.
  • the coupling sleeves 20 When drilling in downward direction it is preferred to grip the coupling sleeves 20 by the surfaces 5415f the jaw portions 52 inwhich'case the stepped portion'fiti is-able to stop axial slipping of the gripped sleeve down into the drilled hole.
  • the surfaces 54 of the jaw portions 53 are used for gripping, the stepped portion 51 in a correspondingmanner acting as an axial stop to prevent slipping of the drill string rearwardly out of the closed jaws 42.
  • the vise action of the jaws is efliciently augmented by the direct application of power from the pistons 28 via the piston rods 29 on thejaws 42 and the rigidity of these elements. Also there is full rigidity of the jaws 42 against rotation thanks to the eccentric mounting of the piston rods 29 in the housings. 22, which prevents such rotation.
  • each said piston includes a piston rod projecting therefrom with said piston rods being axially aligned and in opposed relation to each other and having said opposed jaws disposed thereon on the ends opposite said piston, and means disposed in each of said cylinders and connected to said rods for preventing rotation of said rods in said cylinders.
  • said rotation preventing means is a journal receiving said piston rods in each, of said cylinders, with said journals being disposed with the axes thereof in parallel relationship to an axis of the said respective cylinder but radially offset therefrom.
  • a drill steel gripper to be mounted on the feed shell of a rock drill for intermittently gripping portions of the drill string actuated by said rock drill and having a support therefor for mounting on said feed shell and a source of pressure fluid, the combination which comprises a pair of opposed power cylinders aligned axially on said support, a piston reciprocably movable in each said cylinder, piston rods connected to each said piston and projecting from said cylinders in a direction opposing each other, a pair of opposed gripping jaws with each of said pair connected to a dilferent one of said piston rods by securing means passing through one end of the piston rod into the back of each of the jaws and freely and solely supported thereby for movement by said pistons respectively from a gripping position adjacent each other to a separated position away from each other, grip ping surfaces on said jaws for frictionally gripping predetermined portions of said drill string in said gripping position of said jaws, and control means between said source and said cylinders for admitting pressure fluid selectively against the faces of
  • a drill steel gripper as recited in claim 8 in which said rotation preventing means is a journal disposed in each of said cylinders slidably receiving said piston rods, with the axis of each said journal being radially ofiset from but parallel with the axis of its respective cylinder.

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  • 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)
  • Basic Packing Technique (AREA)
  • Binders And Loading Units For Sheaves (AREA)
US201977A 1962-06-12 1962-06-12 Drill steel centralizers Expired - Lifetime US3231318A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US201977A US3231318A (en) 1962-06-12 1962-06-12 Drill steel centralizers
GB20454/63A GB960579A (en) 1962-06-12 1963-05-22 Improvements in drill steel centralizers
ES288852A ES288852A1 (es) 1962-06-12 1963-06-08 Perfeccionamientos en los centradores de las barras perforadoras
FI631196A FI41525C (fi) 1962-06-12 1963-06-12 Poranohjaus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US201977A US3231318A (en) 1962-06-12 1962-06-12 Drill steel centralizers

Publications (1)

Publication Number Publication Date
US3231318A true US3231318A (en) 1966-01-25

Family

ID=22748064

Family Applications (1)

Application Number Title Priority Date Filing Date
US201977A Expired - Lifetime US3231318A (en) 1962-06-12 1962-06-12 Drill steel centralizers

Country Status (4)

Country Link
US (1) US3231318A (en:Method)
ES (1) ES288852A1 (en:Method)
FI (1) FI41525C (en:Method)
GB (1) GB960579A (en:Method)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334948A (en) * 1964-01-07 1967-08-08 Atlas Copco Ab Drill steel guides
US3441323A (en) * 1967-06-07 1969-04-29 Gardner Denver Co Centralizer
USRE30071E (en) * 1973-12-21 1979-08-14 Atlas Copco Aktiebolag Drill string element handling apparatus
US4260029A (en) * 1978-12-27 1981-04-07 Joy Manufacturing Company Midpoint centralizer
CN104583529A (zh) * 2012-08-30 2015-04-29 阿特拉斯·科普柯凿岩设备有限公司 用于钻支承装置的方法、钻支承装置、包括钻支承装置的车辆以及计算机程序产品
CN109267951A (zh) * 2018-10-15 2019-01-25 中国石油天然气集团有限公司 钻杆导引机构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI66053C (fi) * 1982-05-17 1984-08-10 Tampella Oy Ab Styrning foer en borrstaong i en borrmaskin
FI81887C (fi) * 1989-03-08 1990-12-10 Tampella Oy Ab Mellanstyranordning foer bergborrningsmaskin.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2242739A (en) * 1939-08-15 1941-05-20 Longyear E J Co Drill
US2679177A (en) * 1953-05-13 1954-05-25 Gepfert Franklin Gahl Precision vise of the double-acting type
US2759679A (en) * 1952-09-22 1956-08-21 Robert E Torregrossa Combined bearing and guide means for shafts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2242739A (en) * 1939-08-15 1941-05-20 Longyear E J Co Drill
US2759679A (en) * 1952-09-22 1956-08-21 Robert E Torregrossa Combined bearing and guide means for shafts
US2679177A (en) * 1953-05-13 1954-05-25 Gepfert Franklin Gahl Precision vise of the double-acting type

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334948A (en) * 1964-01-07 1967-08-08 Atlas Copco Ab Drill steel guides
US3441323A (en) * 1967-06-07 1969-04-29 Gardner Denver Co Centralizer
USRE30071E (en) * 1973-12-21 1979-08-14 Atlas Copco Aktiebolag Drill string element handling apparatus
US4260029A (en) * 1978-12-27 1981-04-07 Joy Manufacturing Company Midpoint centralizer
CN104583529A (zh) * 2012-08-30 2015-04-29 阿特拉斯·科普柯凿岩设备有限公司 用于钻支承装置的方法、钻支承装置、包括钻支承装置的车辆以及计算机程序产品
CN104583529B (zh) * 2012-08-30 2016-11-09 阿特拉斯·科普柯凿岩设备有限公司 用于钻支承装置的方法、钻支承装置、包括钻支承装置的车辆以及计算机程序产品
US9739103B2 (en) 2012-08-30 2017-08-22 Atlas Copco Rock Drills Ab Method for a drill support arrangement, drill support arrangement, vehicle comprising a drill support arrangement and computer program product
CN109267951A (zh) * 2018-10-15 2019-01-25 中国石油天然气集团有限公司 钻杆导引机构
CN109267951B (zh) * 2018-10-15 2024-05-28 中国石油天然气集团有限公司 钻杆导引机构

Also Published As

Publication number Publication date
FI41525B (en:Method) 1969-09-01
GB960579A (en) 1964-06-10
FI41525C (fi) 1969-12-10
ES288852A1 (es) 1963-08-01

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