US3328052A - Drill steel centralizer for extension drill steels - Google Patents

Drill steel centralizer for extension drill steels Download PDF

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Publication number
US3328052A
US3328052A US380420A US38042064A US3328052A US 3328052 A US3328052 A US 3328052A US 380420 A US380420 A US 380420A US 38042064 A US38042064 A US 38042064A US 3328052 A US3328052 A US 3328052A
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US
United States
Prior art keywords
jaws
drill
string
sleeves
socket
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
US380420A
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English (en)
Inventor
Nilsson Gunnar Kurt Alfred
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
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Filing date
Publication date
Application filed by Atlas Copco AB filed Critical Atlas Copco AB
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Publication of US3328052A publication Critical patent/US3328052A/en
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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/44—Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44291—Clasp, clip, support-clamp, or required component thereof including pivoted gripping member
    • Y10T24/44368—Pivoted gripping member applies camming force

Definitions

  • This invention relates to drill steel centralizers and coupling aids to be mounted on the feed shell of a rock drill for cooperating for coupling and uncoupling purposes with the coupling sleeves of a string of extension drill rods actuated by the rock drill and connected by coupling sleeves wider than the drill rods.
  • extension drill steel equipment for rock drills it has already been suggested to use the usual drill steel centralizer provided at the forward end of the feed shell and performing the task of guiding the drill string during its axial movement, also as an aid during the coupling and uncoupling operations, whereby drill rods are added to or removed from the drill string usually by screwing or unscrewing the sleeves and drill rods thereof.
  • means can be included therein providing an engagement between the centralizer and the string, such engagement preventing or resisting rotation of the drill string outside .of the feed shell.
  • the centralizer designs hitherto presented in connection herewith are working on the premise of either a time consuming manual handling of the drill steel centralizer for attaining the desired functions or the use of relatively costly and bulky equipment when mechanization of the drill steel centralizer operation is desired.
  • a further important object of the invention is to fully automatize the drill steel centralizer function during uncoupling of the drill rods in connection with raising of the extended drill string from a downwardly pointing drill hold or in connection with coupling of the drill rods when one is drilling in upward direction.
  • FIG. 1 shows a side view of the drill steel centralizer according to the invention during drilling in downward direction.
  • FIG. 2 is a top plan view on the line 22 in FIG. 1.
  • FIG. 3 is a top plan view corresponding to FIG. 2 but showing the drill steel centralizer in frictional engagement with a coupling sleeve.
  • FIG. 4 shows a section on the line 44 in FIG. 2.
  • FIG. 5 illustrates in a view corresponding to FIG. 4 the passage of a coupling sleeve through the drill steel centralizer.
  • FIG. 6 shows a section Sweden, assignor Sweden, a corporaon the line 6-45 in FIG. 3.
  • FIG. 7 is a partly sectional 3,328,052 Patented June 27, 1967 top plan view of a modified embodiment.
  • FIG. 8 is a sectional view on the line 8-8 in FIG. 7.
  • FIG. 9 is a sectional view corresponding to FIG. 8 of a still further modification.
  • FIG. 10 finally is an enlarged section-a1 view
  • a bracket 11 carrying two parallel pivots 12 extending in the longitudinal direction of the feed shell 10.
  • the housing of the drill steel centralizer is divided and consists of two halfcylindrical rings 13 and 14.
  • the ring halves 13 and 14 are pivotally arranged each about one of the pivots 12 and are for that purpose carried by arms 15 afiixed to hubs 16 journalled on the pivots 12.
  • the ring halves 13, 14 carry cars 17 and 18 through which a bolt 19 is inserted.
  • the bolt 19 also passes through a spacing sleeve 20 placed between the ears 17, 18 against which the ears are pressed by means of a spring 21.
  • the spring 21 bears against the outside of the ear 17 and the inside of a nut 22 which is threaded on the bolt 19.
  • the ring halves 13, 14 are each provided with spaced bosses 23 between which pivots 24 extend in substantially parallel relation to the plane of division of the ring halves 13, 14.
  • the lids 25 can be pivoted into a common plane transversely and preferably perpendicularly to the longitudinal axis of the feed shell 10 and to the drill string, and in such position the lids 25 are resting against abutments 26, FIG. 5, on the ring halves 13, 14.
  • the lids 25 are constantly urged towards the abutments 26 and the said perpendicular plane by a biasing force which in the embodiment shown is represented by the force of gravitation.
  • the lids 25 are provided at their center with jaws 27 each consisting of a semi-cylindrical body with semi-cylindrical centering surfaces 28 thereon somewhat wider in diameter than the drill rods.
  • the jaws 27 are adapted to guidingly surround the drill rods 29 to be guided by the drill steel centralizer.
  • the drill rods 29 are in the usual manner provided with threads 30 at their ends and are kept together by coupling sleeves 31.
  • cooperating bayonet lock members on the sleeves 31 and drill rods 29 to effect the coupling and uncoupling therebetween.
  • the rock drill which is movable to and fro along the feed shell 10 by machine power from a feeding motor and which can be a percussive drill or a rotary drill, is arranged to rotate the connected drill rods 29 bidirectionally.
  • the rotation and the impact energy can be transmitted from the drill to the drill string in the usual manner by means of a shank adapter, not shown, mounted in the rock drill which adapter is releasably connected or threaded fast to a coupling sleeve 31 on the rear end of the drill string by suitably rotating the shank adapter in the rock drill.
  • An axial shoulder 32 lies centrally in the jaws 27 and forms a transition from the centering surfaces 28 to semi-cylindrical gripping surfaces 33 which are somewhat smaller in diameter than the coupling sleeves 31 and in the adjacent position of the jaws 27 form a socket adapted to receive the sleeves 31 therein.
  • the gripping surfaces 33 are terminated at one end of the jaws 27 by conical entering surfaces 34.
  • the drill Upon removal of the unscrewed d-rill rod 29 and the uppermost coupling sleeve 31, the drill is advanced along the feed shell, whereupon the adapter is threaded by power into the coupling sleeve 31 locked in the centralizer. Thereupon the drill string is again raised a full feed length, whereby the next coupling sleeve 31 passes the drill steel centralizer and in an analogous way is locked automatically therein. The automatic action of the drill steel centralizer is repeated until the entire drill string has been raised.
  • the drill steel centralizer is used in a position analogous with the position in FIG. 4 firstly for guiding of the first drill rod with the drill bit there-on during collaring of the hole and thereupon for coupling the sleeves 31 by power from the rock drill.
  • a depressable foot pedal 35 which is pivotally journalled on a sleeve 36 on the spacing sleeve 20 and carries a curved rod 37 pointing from below towards the lids 25, and which furthermore at its end carries pieces of pipe 38 projecting obliquely in lateral direction for purposes of engaging the lids, the lids can be opened when necessary to such an extent that the coupling sleeves 31 can pass freely in downward as well as upward direction through the drill steel centralizer.
  • Insertion and coupling of new drill rods during downward drilling is performed by firstly driving the shank adapter carrying the drill string and the uppermost coupling sleeve 31 down into the guiding jaws according to FIG. 6, whereupon the adapter is threaded loose .out of the frictionally gripped sleeve 31 and together with the rock drill is retracted by the feed motor. Thereupon the next drill rod 29 is inserted in the locked coupling sleeve 31 and simultaneously therewith the adapter is screwed into the coupling sleeve 31 loosely screwed on the rearend of the newly inserted drill rod 29. After screwing the parts together the rock drill raises the drill string and the locked coupling sleeve 31 in upward direction from the position in FIG.
  • the lids 25 can be turned out into inactive position indicated at 40 in FIG. 2 by dash and dot lines at which instant the entire opening inside of the ring halves 13, 14 is left free. If the drill hole is drilled obliquely it may be justified to provide the biasing force for returning the lid halves 25 against the abutments 26 by means of a pair of torsion springs 411 of which one is diagrammatically indicated in FIG. 2.
  • the jaws by mounting the drill steel centralizer upside down on the pivots 12 with respect to the position in FIG. 1 can be induced during drilling in upward direction to grip and to hold the drill string automatically while coupling of new drill rods is in progress.
  • a stay 42 or a wire may be coupled to the foot pedal 35 so that the guiding jaws can be opened and closed at will from the ground when the coupling sleeves are to be locked or have to pass.
  • the jaws in their adjacent as well as separated position are disposed at one side of the plane of the lids 25 perpendicular to the axis of the drill string, the jaws evidently form an automatic one way slip device with uni-directional locking action for cooperation with the coupling sleeves 31, which device permits the coupling sleeves 31 to pass through the jaws 27 when the drill string moves in its one axial direction, but which during movement of the drill string in opposite direction automatically locks the next coupling sleeve 31 in the drill string advanced to the drill steel centralizer against rotation and axial movement.
  • the coupling sleeves 31 are locked by the gripping surfaces 33 frictionally against rotation so that overloading of the drill steel centralizer is prevented if the loosening of the coupling sleeves by impacts prior to uncoupling was not entirely successful.
  • the drill string is locked by positive engagement by the abutment shoulder 32 against axial movement so that the string during downward drilling is unable to fall down into the hole or during upward drilling cannot fall out of the drill hole and cause the operator to get hurt.
  • a single integral ring 39 replaces the ring halves 13, 14 and carries the ears 23 in which the pivots 24 of the lid halves 25 are journalled. Between the pivots 24 and the ears 23 are provided resilient bushings 41 of rubber or plastic material.
  • the ring 39 is connected to the hub 16 journalled on the pivots 12 by means of a single connecting plate 421. At its end turned away from the pivots 12 the ring 39 carries fixedly thereon two parallel ears 43 in which a transverse axle 44 is journalled. On the transverse axle is mounted the spacing sleeve 20 as well as the bushing 36 of the foot pedal 35 as before.
  • a pair of abutments 45 are provided on a suitable level on the inside of the ring 39 in diametrically opposite positions, which abutments coact with the undersides of the lids 25 forming end stops for said lids when they are in a pOsitiOn perpendicular to the drill string, FIG. 8.
  • the operation of the embodiment according to FIGS. 7, 8 is unaltered as for the embodiment of FIG. 1-6 with the exception that the radial gripping act-ion of the guiding jaws 27 results from compression of the bushings 41 instead of compression of the spring 21.
  • the height of the abutments 45 is smaller and a prismatic rubber strip 46 is fastened on each abutment 45 coacting with the underside of the lids 25.
  • the gripping surfaces 47 of the jaws 27 are toothed by suitably provided grooves.
  • Suitable abutments 48 can be provided on the lids 25 coacting with the upper side of the ring 39, whereby the lids 25 are prevented from being pushed too far from the horizontal position. This prevents an overcharging of the jaws 27 and pivots 24 during impacts which occasionally can be delivered to the shoulders 32 when the uppermost threaded connections are to be hit loose with the drill string in position in the drill steel centralizer.
  • the bias for urging the jaws 27 towards the adjacent position with the lids substantially perpendicular to the drill string can as an alternative be provided solely by springs similar to the spring-s 411 indicated in FIG. 2.
  • Drill steel centralizer apparatus as set forth in claim 1 in which is provided means on said support providing a certain movability of said jaws toward and away from said string in directions transverse thereto, with said resilient means on said support for constantly urging said jaws toward said string in said directions transverse thereto,
  • Drill steel centralizer apparatus as described in claim 1 in which said support has disposed thereon ring halves with each half carrying one of said jaws and surrounding said string, pivot means on said feed shell substantially parallel with said string and connected to one end of said halves for pivotally moving them with respect to said string, and with said resilient means including a spring disposed on the ends of said halves opposite said pivot means for urging said ring halves toward each other.
  • the combination which comprises a pair of cooperating relatively movable jaws pivotally mounted on said support to pivot between a closed and a separated position about axes disposed in a plane transverse to said string for forming in said closed position thereof a socket in alignment with said string with an opening sufficient freely to pass said drill rods axially therethrough but to receive and arrest said sleeves therein upon axial movement of said string in one longitudinal direction, said jaws being disposed in said closed position as well as said separated position on only one side of said transverse plane, the combination which comprises biasing means connected to said jaws for the pivoting thereof toward said closed position whereby said jaws and socket 8 form a one-way slip device for said sleeves permitting them to pass said jaws only when said string moves in a direction opposite to said one
  • Drill steel centralizer apparatus as described in claim 9 in which said socket is smaller than said sleeves, with means disposed on said support providing a certain movability of said jaws radially toward and away from said string, said resilient means constantly urging said jaws radially toward said string, and cooperating surfaces at the mouth of said socket and on said sleeves for expanding said ja'ws transversely against the action of said resilient means for causing said sleeves to be gripped frictionally by said socket when a sleeve is received therein.

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  • 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)
US380420A 1963-07-10 1964-07-06 Drill steel centralizer for extension drill steels Expired - Lifetime US3328052A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE767363 1963-07-10

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US (1) US3328052A (enrdf_load_stackoverflow)
BE (1) BE650346A (enrdf_load_stackoverflow)
FI (1) FI41143C (enrdf_load_stackoverflow)
GB (1) GB1013073A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986569A (en) * 1973-12-21 1976-10-19 Atlas Copco Aktiebolag Drill string element handling apparatus
US4037733A (en) * 1975-07-29 1977-07-26 Hagenuk Vormals Neufeldt And Kuhnke G.M.B.H. Bar holder arrangement for bar stock material to be fed to a machine tool
US4088230A (en) * 1974-08-19 1978-05-09 Hagenuk Vormals Neufeldt And Kuhnke Gmbh Control means for a bar holder and feeder coupled to an automatic machine tool
USRE30071E (en) * 1973-12-21 1979-08-14 Atlas Copco Aktiebolag Drill string element handling apparatus
US5163513A (en) * 1991-06-28 1992-11-17 Bowen Tools, Inc. Circle threadform for marine riser top joint
CN109056688A (zh) * 2018-09-04 2018-12-21 王盼 一种水下可连续贯入的静力触探装置
CN118774647A (zh) * 2024-08-27 2024-10-15 高邮市驰越机械有限公司 一种石油开采用钻杆对中装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1957510C2 (de) * 1969-11-15 1982-04-22 Robert Bosch Gmbh, 7000 Stuttgart Handgeführtes Schlagbohrgerät
FI64837C (fi) * 1982-08-31 1984-02-09 Tampella Oy Ab Borrstyrning foer en apparat foer skarvstaongsborrning

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US221162A (en) * 1879-08-09 1879-11-04 Improvement in casing-head caps for oil and other wells
US322242A (en) * 1885-07-14 David beery
US865872A (en) * 1907-01-24 1907-09-10 Thaddeus Stevens Cranston Casing-head.
US888165A (en) * 1907-06-11 1908-05-19 Thomas H Harrington Hose-coupling.
US1485308A (en) * 1922-12-22 1924-02-26 Ralph H Stegeman Holding device for sucker rods
US1486035A (en) * 1924-03-04 Pipe-suspending apparatus
US2010284A (en) * 1933-08-15 1935-08-06 Baash Ross Tool Co Casing head

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US322242A (en) * 1885-07-14 David beery
US1486035A (en) * 1924-03-04 Pipe-suspending apparatus
US221162A (en) * 1879-08-09 1879-11-04 Improvement in casing-head caps for oil and other wells
US865872A (en) * 1907-01-24 1907-09-10 Thaddeus Stevens Cranston Casing-head.
US888165A (en) * 1907-06-11 1908-05-19 Thomas H Harrington Hose-coupling.
US1485308A (en) * 1922-12-22 1924-02-26 Ralph H Stegeman Holding device for sucker rods
US2010284A (en) * 1933-08-15 1935-08-06 Baash Ross Tool Co Casing head

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986569A (en) * 1973-12-21 1976-10-19 Atlas Copco Aktiebolag Drill string element handling apparatus
USRE30071E (en) * 1973-12-21 1979-08-14 Atlas Copco Aktiebolag Drill string element handling apparatus
US4088230A (en) * 1974-08-19 1978-05-09 Hagenuk Vormals Neufeldt And Kuhnke Gmbh Control means for a bar holder and feeder coupled to an automatic machine tool
US4037733A (en) * 1975-07-29 1977-07-26 Hagenuk Vormals Neufeldt And Kuhnke G.M.B.H. Bar holder arrangement for bar stock material to be fed to a machine tool
US5163513A (en) * 1991-06-28 1992-11-17 Bowen Tools, Inc. Circle threadform for marine riser top joint
CN109056688A (zh) * 2018-09-04 2018-12-21 王盼 一种水下可连续贯入的静力触探装置
CN109056688B (zh) * 2018-09-04 2023-10-24 武汉吉欧信海洋科技股份有限公司 一种水下可连续贯入的静力触探装置
CN118774647A (zh) * 2024-08-27 2024-10-15 高邮市驰越机械有限公司 一种石油开采用钻杆对中装置

Also Published As

Publication number Publication date
FI41143C (fi) 1969-09-10
GB1013073A (enrdf_load_stackoverflow) 1965-12-15
FI41143B (enrdf_load_stackoverflow) 1969-06-02
BE650346A (enrdf_load_stackoverflow) 1964-11-03

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