US1815660A - Slip socket tool joint - Google Patents
Slip socket tool joint Download PDFInfo
- Publication number
- US1815660A US1815660A US441902A US44190230A US1815660A US 1815660 A US1815660 A US 1815660A US 441902 A US441902 A US 441902A US 44190230 A US44190230 A US 44190230A US 1815660 A US1815660 A US 1815660A
- Authority
- US
- United States
- Prior art keywords
- section
- arms
- upper section
- sections
- locking arms
- 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
Links
- 238000012856 packing Methods 0.000 description 6
- MUDBNSUKTFIAJT-UHFFFAOYSA-N Kerlin Natural products O1C2(C)CCC34COC(=O)C3=CCCC4C2(C)CC1C1=CC(=O)OC1 MUDBNSUKTFIAJT-UHFFFAOYSA-N 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/69—Redundant disconnection blocking means
-
- 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
- Y10T403/00—Joints and connections
- Y10T403/60—Biased catch or latch
- Y10T403/608—Pivoted
Definitions
- This invention' relates to tool joints such as are used on rotary drill stems and the general object of the invention is to provide a tool joint .with a slip socket with means whereby the lower section of the tool joint may be readily locked in'place upon the .upper section or as readily unlocked and more specifically in which the upper section of the joint is provided with locking arms normally urged outward by a spring, the lower section of the joint being formed with sockets within which the locking arms can engage when,dcpressed against the action of springs; the upper section being provided with a'slip collar adapted to be shifted down over said arms to force the lower ends of the arms inward into engagement with the lower section of the joint.
- a further object is to provide latching the slip collar in place.
- Figure 1 is a vertical sectional view through a tool joint constructed in accord:
- Figure 2 is a section on the Figure 1.
- 10 designates the upper section of the joint and 11 the lower section thereof.
- the upper section at its upper end is threaded at 12 for engagement with the drill stem, the lower end of the lower section being threaded at 13 for a like" purpose.
- the upper section at itslower end is reduced in diameter as at 15 to provide a shoulder 16 and above this shoulder 16 the upper section is reduced in diameter as at 17.
- the confronting end faces of the, upper and line 2-2 of :lower sections are provided with the packing 18 which may be carried in a packing groove either in the shoulder 16 or the confronting face of the upper end of the section 11.
- the lower and upper sections are both bored as at 19 and the lower section is counterbored as at 20 and a packing ring 21 is provided at the lower end of this counterbore against which the lower end of the upper section rests.
- each arm 21 is mounted in slots in the reduced portion 17 of the upper section.
- the upper section is annularly recessed as at 24 and each arm 21 is provided with a head 25 engaging in this recess.
- the up er end of the lower section is re-- quizd in iameter as at 27.
- the surface of the reduced portion 27 is circumferentially recessed as at 28. Extending upward from each of these recesses is a vertical groove 29, these grooves being less in depth than the depth of the grooves 28.
- the sleeve 32 slidingly mounted upon the reduced portion 17 of the uppersect-ion 10.
- This sleeve is of sufficient length so that when it is raised, it will move above the pivotal axes 23 of,the arms 22 so that these arms may be projected outward by the springs 26.
- the sleeve When the sleeve is moved downward, however, it will force the lower ends 'of the arms 22 inward into the recess 28 and look the upper section to the lower section.
- the heavy shoulders 25 and 25a formed at the upper and lower ends of the locking arms form a strong joint so as to prevent pulling strains coming upon the pins 23.
- the locking arms should have a width equal to one-sixth of the circle at the base of the lock for the same purpose.
- the two sections may be readily locked in engagement with each other or unlocked and when locked the two sections are held in watertight engagement and water may pass downward through the bores 19 in the usual manner.
- the sleeve or collar 32 is limited in its'movement by the shoulders 36 and 37 formed upon the upper and lower sections respectively.
- a slip joint of the character described comprising an upper tubular section and a lower tubular section, the upper section and the lower section respectively having interfitting male and female portions, the two sections being formed with longitudinally alined grooves, locking arms pivoted in the grooves of one section andwhen depressed engagin in the grooves of the other section, the locking arms having shoulders at their upper and lower ends having overlapping engagement with confronting portions of the upper and lower sections, springs urging the free ends of the locking arms outward, and a sleeve slidingly mounted upon the upper section and adapted when lowered to force said locking arms inward into locking engagement with the lower section.
- a slip joint of the character described comprising an upper section and a'lower section, the upper and lower sections having alining bores, the lower section having a counter-bore and the upper section having a reduced portion inserted in said counterbore, the lower and upper ends of the upper and lower sections respectively being formed with alining grooves, the upper end of each groove opening into a recess formed in the upper section, the lower end of each groove opening into a recess formed in the lower section, locking arms pivoted adjacent their upper ends in said grooves and having inwardly extending shoulders engaging in said upper and lower recesses when the locking arms are closed, springs urging the lower ends of the locking arms outward, and a sliding sleeve mounted upon the upper section and shiftable downward over the upper arms to shift the arms inward.
- a slip joint of the character described comprising an upper section and a lower section, the upper and lower sections having alining bores, the lower section having a counter-bore and the upper section having a reduced portion inserted in said counterbore, the lower and upper ends of the upper and lower sections respectively being formed with alining grooves, the upper end of each groove opening into a recess formed in the upper section, the lower end of each groove opening into a recess formed in the lower section, locking arms pivoted adjacent their upper ends in said grooves and having in- "adapted wardly extending shoulders engaging in said recesses when the locking arms are closed, springs urging the lower ends of the locking arms outward and a sliding sleeve mounted upon the upper section and shiftable downward over the upper arms to shift the arms inward, the sleeve having means whereby it may be detachably held in either its raised or lowered position.
- a slip joint of the character described comprising an upper section and a lower sec tion, both having alining bores, the upper section having a reduced portion fitting within the bore of the lower section, the confronting ends of the two sections being provided with packing, longitudinally extending grooves formed in the adjacent ends of the two sections, a recess within which the upper ends of said grooves terminate in the upper section.
- a slip joint of the character described comprising an upper section and a lower section, both having alining bores, the upper section having a reduced portion fitting within the bore of the lower section, the confronting ends of the two sections being provided with packing, longitudinally extending grooves formed in the ad'acent ends of the two sections, a recess wit in which the upper end of each groove terminates in the upper section, a recess in the lower section in which the lower end of each groove terminates, locking arms pivoted adjacent their upper ends in the grooves of the upper section, the locking arms having inwardly projecting shoulders at their upper and'lower ends engaging in the upper and lower recesses, springs urging the lower ends of the locking arms outward, and a sliding sleeve mounted upon the upper section and when lowered to extend over said arms to hold the arms closed against the action of the springs, the upper and lower sections being reduced in diameter to receive said sleeve and provide limiting shoulders on the upper and lower sections limiting the movement of the sleeve
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)
- Clamps And Clips (AREA)
Description
y 1931. T. M. WALKER I SLIP SOCKET TOOL JOINT Filed April 5, 1950 '7 IV- M/aZZ ar" Patented July 21, 1931 THOMAS M. WALI KER, 6F KERLIN, ARKANSAS SLIP SOCKET Application filed April 5,
. This invention'relates to tool joints such as are used on rotary drill stems and the general object of the invention is to provide a tool joint .with a slip socket with means whereby the lower section of the tool joint may be readily locked in'place upon the .upper section or as readily unlocked and more specifically in which the upper section of the joint is provided with locking arms normally urged outward by a spring, the lower section of the joint being formed with sockets within which the locking arms can engage when,dcpressed against the action of springs; the upper section being provided with a'slip collar adapted to be shifted down over said arms to force the lower ends of the arms inward into engagement with the lower section of the joint.
A further object is to provide latching the slip collar in place.
Other objects will appear in the course of the following description.
My invention is illustrated in the accompanying drawings, wherein Figure 1 is a vertical sectional view through a tool joint constructed in accord:
means for ance with my invention;
Figure 2 is a section on the Figure 1.
Referring to these drawings, 10 designates the upper section of the joint and 11 the lower section thereof. The upper section at its upper end is threaded at 12 for engagement with the drill stem, the lower end of the lower section being threaded at 13 for a like" purpose. The upper section at itslower end is reduced in diameter as at 15 to provide a shoulder 16 and above this shoulder 16 the upper section is reduced in diameter as at 17. The confronting end faces of the, upper and line 2-2 of :lower sections are provided with the packing 18 which may be carried in a packing groove either in the shoulder 16 or the confronting face of the upper end of the section 11. The lower and upper sections are both bored as at 19 and the lower section is counterbored as at 20 and a packing ring 21 is provided at the lower end of this counterbore against which the lower end of the upper section rests.
r001. trounce 1930. Serial No. 441,902.
It will be seen that the upper section fits into the lower section and against the packing rings 18 and 21 when the two sections are engaged with each other.
Mounted in slots in the reduced portion 17 of the upper section are a plurality oflocking arms 22 shown as three in number and pivoted upon pivot pins 23. The upper section is annularly recessed as at 24 and each arm 21 is provided with a head 25 engaging in this recess. A spring 26, one for each arm, urges the lower end of each arm 21 outward.
The up er end of the lower section is re-- duced in iameter as at 27. The surface of the reduced portion 27 is circumferentially recessed as at 28. Extending upward from each of these recesses is a vertical groove 29, these grooves being less in depth than the depth of the grooves 28.
For the purpose of holding the jaws closed in engagement with the annular recess 28, I .provide the sleeve 32 slidingly mounted upon the reduced portion 17 of the uppersect-ion 10. This sleeve is of sufficient length so that when it is raised, it will move above the pivotal axes 23 of,the arms 22 so that these arms may be projected outward by the springs 26. When the sleeve is moved downward, however, it will force the lower ends 'of the arms 22 inward into the recess 28 and look the upper section to the lower section. The heavy shoulders 25 and 25a formed at the upper and lower ends of the locking arms form a strong joint so as to prevent pulling strains coming upon the pins 23. Preferably the locking arms should have a width equal to one-sixth of the circle at the base of the lock for the same purpose.
In order to hold the sleeve 32 in its raised or lowered position, I provide a set screw 33 inserted through the sleeve and preferably engaging in a longitudinal groove 34 formedv in the upper section 10. By turning this screw in the lock, the sleeve or slip collar may be held in a raised or lowered position.
what has gone before. By its means the two sections may be readily locked in engagement with each other or unlocked and when locked the two sections are held in watertight engagement and water may pass downward through the bores 19 in the usual manner.
It will be noted that the sleeve or collar 32 is limited in its'movement by the shoulders 36 and 37 formed upon the upper and lower sections respectively.
I claim 1. A slip joint of the character described, comprising an upper tubular section and a lower tubular section, the upper section and the lower section respectively having interfitting male and female portions, the two sections being formed with longitudinally alined grooves, locking arms pivoted in the grooves of one section andwhen depressed engagin in the grooves of the other section, the locking arms having shoulders at their upper and lower ends having overlapping engagement with confronting portions of the upper and lower sections, springs urging the free ends of the locking arms outward, and a sleeve slidingly mounted upon the upper section and adapted when lowered to force said locking arms inward into locking engagement with the lower section.
2. A slip joint of the character described, comprising an upper section and a'lower section, the upper and lower sections having alining bores, the lower section having a counter-bore and the upper section having a reduced portion inserted in said counterbore, the lower and upper ends of the upper and lower sections respectively being formed with alining grooves, the upper end of each groove opening into a recess formed in the upper section, the lower end of each groove opening into a recess formed in the lower section, locking arms pivoted adjacent their upper ends in said grooves and having inwardly extending shoulders engaging in said upper and lower recesses when the locking arms are closed, springs urging the lower ends of the locking arms outward, and a sliding sleeve mounted upon the upper section and shiftable downward over the upper arms to shift the arms inward.
3. A slip joint of the character described, comprising an upper section and a lower section, the upper and lower sections having alining bores, the lower section having a counter-bore and the upper section having a reduced portion inserted in said counterbore, the lower and upper ends of the upper and lower sections respectively being formed with alining grooves, the upper end of each groove opening into a recess formed in the upper section, the lower end of each groove opening into a recess formed in the lower section, locking arms pivoted adjacent their upper ends in said grooves and having in- "adapted wardly extending shoulders engaging in said recesses when the locking arms are closed, springs urging the lower ends of the locking arms outward and a sliding sleeve mounted upon the upper section and shiftable downward over the upper arms to shift the arms inward, the sleeve having means whereby it may be detachably held in either its raised or lowered position.
4. A slip joint of the character described, comprising an upper section and a lower sec tion, both having alining bores, the upper section having a reduced portion fitting within the bore of the lower section, the confronting ends of the two sections being provided with packing, longitudinally extending grooves formed in the adjacent ends of the two sections, a recess within which the upper ends of said grooves terminate in the upper section. a recess formed in the lower section in which the lower end of each groove terminates, locking arms pivoted adjacent their upper ends in the grooves of the upper section, the locking arms having inwardly projecting shoulders at their upper and lower ends engaging in the upper an lower recesses, springs urging the lower ends of the locking arms outward, and a sliding sleeve mounted upon the upper section and when lowered adapted to extend over said arms to hold the arms closed against the action of the springs,
5. A slip joint of the character described, comprising an upper section and a lower section, both having alining bores, the upper section having a reduced portion fitting within the bore of the lower section, the confronting ends of the two sections being provided with packing, longitudinally extending grooves formed in the ad'acent ends of the two sections, a recess wit in which the upper end of each groove terminates in the upper section, a recess in the lower section in which the lower end of each groove terminates, locking arms pivoted adjacent their upper ends in the grooves of the upper section, the locking arms having inwardly projecting shoulders at their upper and'lower ends engaging in the upper and lower recesses, springs urging the lower ends of the locking arms outward, and a sliding sleeve mounted upon the upper section and when lowered to extend over said arms to hold the arms closed against the action of the springs, the upper and lower sections being reduced in diameter to receive said sleeve and provide limiting shoulders on the upper and lower sections limiting the movement of the sleeve, and meanswhereby the sleeve may be held in either its raised or its lowered position.
In testimony whereof I hereunto afiix my signature.
I THOMAS M. WALKER.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US441902A US1815660A (en) | 1930-04-05 | 1930-04-05 | Slip socket tool joint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US441902A US1815660A (en) | 1930-04-05 | 1930-04-05 | Slip socket tool joint |
Publications (1)
Publication Number | Publication Date |
---|---|
US1815660A true US1815660A (en) | 1931-07-21 |
Family
ID=23754753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US441902A Expired - Lifetime US1815660A (en) | 1930-04-05 | 1930-04-05 | Slip socket tool joint |
Country Status (1)
Country | Link |
---|---|
US (1) | US1815660A (en) |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2427681A (en) * | 1944-05-13 | 1947-09-23 | Lombard Herman | Connector for rods, stanchions, and the like |
US2532686A (en) * | 1945-09-18 | 1950-12-05 | Ware Cecil | Safety joint |
US2742307A (en) * | 1951-04-21 | 1956-04-17 | Gen Logistics | Connection and fastening device |
US2844348A (en) * | 1955-11-08 | 1958-07-22 | Thomas H Jordan | Adjustable support |
US2902297A (en) * | 1956-01-04 | 1959-09-01 | Aeroquip Corp | Pressure testing adaptor |
US2942897A (en) * | 1957-12-10 | 1960-06-28 | Eon Corp | Fastening device |
US2967724A (en) * | 1957-05-08 | 1961-01-10 | Salem Tool Co | Air drill stem |
US3024051A (en) * | 1960-05-25 | 1962-03-06 | Borg Warner | Remote coupling mechanism |
US3339944A (en) * | 1965-01-28 | 1967-09-05 | Universal Space Corp | Tubular coupler for conduits |
US3593594A (en) * | 1968-10-04 | 1971-07-20 | Technical Operations Inc | Apparatus for manipulating radioactive material to and from a storage unit |
US4026581A (en) * | 1975-11-13 | 1977-05-31 | Lacrex Brevetti S.A. | Releasable coupling |
US4062573A (en) * | 1974-06-17 | 1977-12-13 | Henry Fleischer | Clamping device |
US4191406A (en) * | 1978-09-05 | 1980-03-04 | Eaton Edward M | Quick acting coupling |
US4226447A (en) * | 1976-01-09 | 1980-10-07 | Brown Oil Tools, Inc. | Swivel apparatus |
US4444419A (en) * | 1982-03-01 | 1984-04-24 | Sozaburo Maeshiba | Structure for prevention of mixing of different kinds of oils for oil-feeding couplings |
US4618288A (en) * | 1985-10-04 | 1986-10-21 | Mcdermott International, Inc. | Releasable lowering and coupling assembly for pile driving |
US4621718A (en) * | 1982-11-29 | 1986-11-11 | Stanley Works | Ratchet screwdriver |
US5671915A (en) * | 1995-08-11 | 1997-09-30 | Williams; Willis Ray | Locking cam workpiece clamping apparatus |
US6619711B2 (en) * | 1998-03-20 | 2003-09-16 | Scaglia Spa | Device to automatically attach a bobbin-bearing shaft to a mandrel of a machine |
US20040021316A1 (en) * | 2002-01-23 | 2004-02-05 | Werner Rogg | Coupling for charging and venting operations of hydraulic systems |
WO2009124051A2 (en) * | 2008-03-31 | 2009-10-08 | Center Rock Inc. | Down-the-hole drill drive coupling |
US20100059284A1 (en) * | 2008-03-31 | 2010-03-11 | Center Rock, Inc. | Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly |
US20100187017A1 (en) * | 2009-01-28 | 2010-07-29 | Center Rock, Inc. | Down-the-hole Drill Reverse Exhaust System |
US8622152B2 (en) | 2009-01-28 | 2014-01-07 | Center Rock Inc. | Down-the-hole drill hammer having a sliding exhaust check valve |
-
1930
- 1930-04-05 US US441902A patent/US1815660A/en not_active Expired - Lifetime
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2427681A (en) * | 1944-05-13 | 1947-09-23 | Lombard Herman | Connector for rods, stanchions, and the like |
US2532686A (en) * | 1945-09-18 | 1950-12-05 | Ware Cecil | Safety joint |
US2742307A (en) * | 1951-04-21 | 1956-04-17 | Gen Logistics | Connection and fastening device |
US2844348A (en) * | 1955-11-08 | 1958-07-22 | Thomas H Jordan | Adjustable support |
US2902297A (en) * | 1956-01-04 | 1959-09-01 | Aeroquip Corp | Pressure testing adaptor |
US2967724A (en) * | 1957-05-08 | 1961-01-10 | Salem Tool Co | Air drill stem |
US2942897A (en) * | 1957-12-10 | 1960-06-28 | Eon Corp | Fastening device |
US3024051A (en) * | 1960-05-25 | 1962-03-06 | Borg Warner | Remote coupling mechanism |
US3339944A (en) * | 1965-01-28 | 1967-09-05 | Universal Space Corp | Tubular coupler for conduits |
US3593594A (en) * | 1968-10-04 | 1971-07-20 | Technical Operations Inc | Apparatus for manipulating radioactive material to and from a storage unit |
US4062573A (en) * | 1974-06-17 | 1977-12-13 | Henry Fleischer | Clamping device |
US4026581A (en) * | 1975-11-13 | 1977-05-31 | Lacrex Brevetti S.A. | Releasable coupling |
US4226447A (en) * | 1976-01-09 | 1980-10-07 | Brown Oil Tools, Inc. | Swivel apparatus |
WO1980000607A1 (en) * | 1978-09-05 | 1980-04-03 | E Eaton | Quick acting coupling |
US4191406A (en) * | 1978-09-05 | 1980-03-04 | Eaton Edward M | Quick acting coupling |
US4444419A (en) * | 1982-03-01 | 1984-04-24 | Sozaburo Maeshiba | Structure for prevention of mixing of different kinds of oils for oil-feeding couplings |
US4621718A (en) * | 1982-11-29 | 1986-11-11 | Stanley Works | Ratchet screwdriver |
US4618288A (en) * | 1985-10-04 | 1986-10-21 | Mcdermott International, Inc. | Releasable lowering and coupling assembly for pile driving |
US5671915A (en) * | 1995-08-11 | 1997-09-30 | Williams; Willis Ray | Locking cam workpiece clamping apparatus |
US6619711B2 (en) * | 1998-03-20 | 2003-09-16 | Scaglia Spa | Device to automatically attach a bobbin-bearing shaft to a mandrel of a machine |
US20040021316A1 (en) * | 2002-01-23 | 2004-02-05 | Werner Rogg | Coupling for charging and venting operations of hydraulic systems |
WO2009124051A2 (en) * | 2008-03-31 | 2009-10-08 | Center Rock Inc. | Down-the-hole drill drive coupling |
WO2009124051A3 (en) * | 2008-03-31 | 2009-12-30 | Center Rock Inc. | Down-the-hole drill drive coupling |
US20100059284A1 (en) * | 2008-03-31 | 2010-03-11 | Center Rock, Inc. | Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly |
US20110036636A1 (en) * | 2008-03-31 | 2011-02-17 | Center Rock, Inc. | Down-the-hole drill drive coupling |
AU2009231791B2 (en) * | 2008-03-31 | 2012-04-05 | Center Rock Inc. | Down-the-hole drill drive coupling |
US8800690B2 (en) | 2008-03-31 | 2014-08-12 | Center Rock Inc. | Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly |
US8915314B2 (en) | 2008-03-31 | 2014-12-23 | Center Rock Inc. | Down-the-hole drill drive coupling |
US20100187017A1 (en) * | 2009-01-28 | 2010-07-29 | Center Rock, Inc. | Down-the-hole Drill Reverse Exhaust System |
US8302707B2 (en) | 2009-01-28 | 2012-11-06 | Center Rock Inc. | Down-the-hole drill reverse exhaust system |
US8622152B2 (en) | 2009-01-28 | 2014-01-07 | Center Rock Inc. | Down-the-hole drill hammer having a sliding exhaust check valve |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1815660A (en) | Slip socket tool joint | |
US3015362A (en) | Well apparatus | |
US3308886A (en) | Retrievable bridge plug | |
US3215204A (en) | Whipstock engaging and releasing device | |
US3398795A (en) | Retrievable well packers | |
US2849245A (en) | Non-rotary threaded coupling | |
US2320107A (en) | Aligning connection for drill collars | |
GB1501577A (en) | Pipe connector | |
US5518072A (en) | Downhole tool for assisting in separating and reconnecting well tubing | |
US2726848A (en) | Logging sub | |
US1776776A (en) | Liner setter and puller | |
US2751017A (en) | Retrievable well packer | |
US3097001A (en) | Unlatching joint apparatus | |
US3279544A (en) | Well packer | |
US3278220A (en) | Grapple for internally threaded pipe | |
US2998073A (en) | Mechanically set well packer | |
US4098335A (en) | Dual string tubing hanger and running and setting tool therefor | |
US3414060A (en) | Selective shifting tool | |
US2751019A (en) | Apparatus for disengaging threaded joints | |
US5170853A (en) | Pipe wiper assembly for a well drilling unit | |
US3013611A (en) | Spring set well pipe engaging apparatus | |
US2856007A (en) | Well tool anchor | |
US2878876A (en) | Well packing tool | |
US2819877A (en) | Safety joint and jarring tool | |
US2976943A (en) | Device for use in uncoupling drill steels |