US3682260A - Rotary percussive drill and method - Google Patents
Rotary percussive drill and method Download PDFInfo
- Publication number
- US3682260A US3682260A US41170A US3682260DA US3682260A US 3682260 A US3682260 A US 3682260A US 41170 A US41170 A US 41170A US 3682260D A US3682260D A US 3682260DA US 3682260 A US3682260 A US 3682260A
- Authority
- US
- United States
- Prior art keywords
- drill bit
- percussion member
- drill
- bit
- hammer
- 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
- 238000000034 method Methods 0.000 title description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000009527 percussion Methods 0.000 claims description 34
- 238000005553 drilling Methods 0.000 claims description 9
- 238000011010 flushing procedure Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000007787 solid Substances 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/002—Drilling with diversely driven shafts extending into the borehole
-
- 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
- E21B10/00—Drill bits
- E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
-
- 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
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
- E21B7/208—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes using down-hole drives
Definitions
- ABSTRACT [51] Int. Cl. ..E2lb 5/00 A to tary percussrve dnll has relatively movable inner [58] and outer concentric drill pipes and a down-the-hole 386 389 396 hammer that acts on 'the inner pipe near the cutting bits. The impact of the hammer is transmitted by an external shoulder on the inner drill to an internal [56] Referenc cned shoulder on the inner drill to an internal shoulder on UNITED STATES PATENTS the outer drill adjacent the bits.
- the present invention relates to rotary earth drills such as those for penetrating overburden and the like, and is of particular application to rotary percussive drills having relatively movable inner and outer drill pipes.
- lt is accordingly an object of the present invention to improve the efficiency of drilling apparatus of the present type by the simultaneous and uniform loading of the inner and outer drill bits by means of a down-thehole percussion hammer.
- Another object of the present invention is the provision of drilling apparatus which is readily adapted to be modified so as to function not only in loose soil or overburden, but also in hard rock, and to provide methods for carrying out the corresponding drilling operations.
- the present invention achieves these objects by providing a percussion member which is disposed between the down-the-hole hammer and the internal drill bit, the percussion member providing radially outwardly extending downwardly facing percussion shoulders which bear on radially inwardly extending upwardly facing percussion shoulders on the outer drill bit.
- This percussion member is screw-threadedly attached to the inner drill bit.
- the inner drill pipe transmits air or water that passes through ports in the inner drill bit to flush away the cuttings, which are transmitted back up through channels in the inner bit and percussion member.
- the inner and outer drills rotate and advance together through overburden or other relatively loose ground formations.
- the inner drill is replaced with one that has no percussion member and that passes downwardly through the outer drill to fonn a bore hole, while the outer drill is held stationary.
- FIG. 1 is a fragmentary elevational view, partly in cross section, of the lower part of drilling apparatus according to the present invention
- FIG. 2 is a bottom plan view of the structure shown in FIG. 1;
- FIG. 3 is an enlarged fragmentary cross-sectional view of the outer drill bit of the present invention.
- FIG. 4 is an exploded elevational view of the percussion member and inner drill bit of the present invention.
- FIG. 5 is a bottom plan view of the structure shown in FIG. 4.
- drilling apparatus comprising an outer drill pipe l, an inner drill pipe 2, an annular outer drill bit 3, an inner drill bit 4, and a conventional down-the-hole hammer 5.
- Outer drill bit 3 is screw-threadedly connected to outer drill pipe 1 at 6.
- Hammer 5 is disposed at the lower end of inner drill pipe 2.
- a percussion member 7 is secured to hammer 5 in non-rotatable relation thereto but has limited axial sliding movement relative to hammer 5.
- the percussion member 7 is shown there in greater detail as having a splined shank 8 insertable in hammer 5, shank 8 having a flat 9 thereon; and at its lower end, member 7 has an externally screw-threaded shank l0 receivable in a correspondingly screw-threaded recess in inner drill bit 4.
- Percussion member 7 has radially outwardly extending shoulder means adjacent its lower end, that terminate downwardly in downwardly facing percussion shoulders l1. Shoulders l1 rest on and are adapted to strike corresponding upwardly facing radially inwardly extending shoulders 12 on drill bit 3. Shoulders l2 may be continuous or spaced apart about a circle.
- Inner drill bit 4 has several ports 13 for air or water V for flushing away cuttings. Ports 13 communicate with a continuous axial bore 14 that extends through percussion member 7 and up through the inner drill pipe. Circumferentially spaced vertical recesses 15 about the outer edges of percussion member 7 provide return passageways for the flushing fluid and are in alignment with corresponding recesses on drill bit 4 when screwthreaded shank l0 is tightened into drill bit 4. The flushing material then passes upwardly in the usual manner between the inner and outer drill pipes. This return passageway also provides a discharge passageway for the working medium discharged from hammer 5.
- outer and inner pipes l and 2 are rotated together by conventional rotary power means (not shown) while being simultaneously loaded by hammer 5 whose impacts are transmitted not only to drill bit 4 but by the novel structure just recited also to drill bit 3.
- the path of transmission of the blows is thus as short as possible.
- a drillingapparatus comprising an outer drill pipe having an outer drill, an inner drill pipe having an inner drill bit and a down-the-hole hammer to transmit percussive vshocks to said inner drill bit, and a percussion member disposed between said hammer and said inner drill bit, said percussion member having portions thereof striking said outer drill bit thereby to transmit percussive shocks also to said outer drill bit, said hammer having an external diameter which is smaller than the least internal diameter of said outer pipe and outer drill bit, thus enabling said inner drill bit to be replaced with another inner drill bit of an outside diameter smaller than the inside diameter of said outer drill pipe and bit to penetrate hard formations with said first drill pipe and said another inner drill bit while maintaining said outer drill pipe and bit stationary.
- said portions of said percussion member comprising downwardly facing radially outwardly extending shoulder means on said percussion member overlying and contacting upwardly facing radially inwardly extending shoulder means on said outer drill bit.
- said inner drill bit having a plurality of pons therethrough for the passage of fluid for flushing cuttings from the drill face, said percussion member having an axial bore therethrough that communicates with said ports.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691927672 DE1927672C3 (de) | 1969-05-30 | 1969-05-30 | Vorrichtung zum Überlagerungsbohren |
DE19702004459 DE2004459A1 (de) | 1970-01-31 | 1970-01-31 | Uberlagerungsbohrgerat und Verfahren zu seinem Betrieb |
Publications (1)
Publication Number | Publication Date |
---|---|
US3682260A true US3682260A (en) | 1972-08-08 |
Family
ID=25757440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US41170A Expired - Lifetime US3682260A (en) | 1969-05-30 | 1970-05-28 | Rotary percussive drill and method |
Country Status (8)
Country | Link |
---|---|
US (1) | US3682260A (es) |
AT (1) | AT296190B (es) |
BE (1) | BE750586A (es) |
CH (1) | CH524755A (es) |
ES (1) | ES380161A1 (es) |
FR (1) | FR2049135B1 (es) |
GB (1) | GB1257429A (es) |
NL (1) | NL7007598A (es) |
Cited By (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3835943A (en) * | 1972-02-25 | 1974-09-17 | R Bray | Drilling apparatus and adaptor assembly for such apparatus |
US3854539A (en) * | 1972-08-23 | 1974-12-17 | Tigre Tierra | Drilling apparatus with down hole motor |
US3870114A (en) * | 1973-07-23 | 1975-03-11 | Stabilator Ab | Drilling apparatus especially for ground drilling |
US3874464A (en) * | 1972-08-23 | 1975-04-01 | Tigre Tierra | Processing of drilling an earth formation |
US3893524A (en) * | 1972-08-23 | 1975-07-08 | Tigre Tierra | Rotary drill rod |
US3903975A (en) * | 1972-08-23 | 1975-09-09 | Tigre Tierra | Drilling apparatus with down-the-hole motor |
US3933209A (en) * | 1972-08-23 | 1976-01-20 | Tigre Tierra, Inc. | Drilling apparatus and technique using down-hole motor |
US3945444A (en) * | 1975-04-01 | 1976-03-23 | The Anaconda Company | Split bit casing drill |
US3990524A (en) * | 1974-06-03 | 1976-11-09 | Tigre Tierra, Inc. | Down-the-hole motor for rotary drill rod and process for drilling using the same |
US4002213A (en) * | 1974-03-01 | 1977-01-11 | Tigre Tierra, Inc. | Down-the-hole motor for rotary drill rod and process for drilling using the same |
US4183415A (en) * | 1977-11-21 | 1980-01-15 | Stenuick France | Drilling apparatus |
US4196783A (en) * | 1978-07-11 | 1980-04-08 | Lofs Verkstads Ab | Device for boring |
US4296821A (en) * | 1980-02-07 | 1981-10-27 | Leslie Larson | Drilling rig and conversion apparatus |
US4408669A (en) * | 1977-04-29 | 1983-10-11 | Sandvik Aktiebolag | Means for drilling |
US4415047A (en) * | 1980-11-24 | 1983-11-15 | Adcock Gerald L | Downhole case driving apparatus for impact drills |
US4852672A (en) * | 1988-08-15 | 1989-08-01 | Behrens Robert N | Drill apparatus having a primary drill and a pilot drill |
US4979848A (en) * | 1988-11-03 | 1990-12-25 | Gerhard Sauer | Drilling device |
WO1993009328A1 (de) * | 1991-11-08 | 1993-05-13 | Renfer, Heinz | Bohrverfahren und einrichtung zur ausübung des verfahrens |
WO1994024405A1 (en) * | 1993-04-08 | 1994-10-27 | Sandvik Ab | Down-hole hammer drill having reverse circulation and drill bit for the hammer drill |
US5503224A (en) * | 1994-06-28 | 1996-04-02 | Big Iron Drilling Ltd. | Casing drive apparatus |
AU677620B2 (en) * | 1992-12-03 | 1997-05-01 | Oy Atlas Copco Rotex Ab | Drilling apparatus |
EP0843073A1 (de) * | 1996-11-13 | 1998-05-20 | Gerhard Dr.-Ing. Sauer | Verfahren und Vorrichtung zum Einsetzen eines Injektionsankers |
WO1998021439A1 (de) * | 1996-11-12 | 1998-05-22 | Techmo Entwicklungs- Und Vertriebs Gmbh | Verfahren und einrichtung zum gleichzeitigen bohren und auskleiden von löchern |
US5839519A (en) * | 1996-11-08 | 1998-11-24 | Sandvik Ab | Methods and apparatus for attaching a casing to a drill bit in overburden drilling equipment |
US6106200A (en) * | 1996-11-12 | 2000-08-22 | Techmo Entwicklungs-Und Vertriebs Gmbh | Process and device for simultaneously drilling and lining a hole |
EP1127477A1 (en) * | 1998-11-04 | 2001-08-29 | Numa Tool Company | Method and device in down-the-hole drilling |
US6675919B2 (en) * | 2000-02-04 | 2004-01-13 | Frank's Casing Crew And Rental Tools, Inc. | Tubular piling apparatus and method |
MY119472A (en) * | 1997-12-13 | 2005-05-31 | Alwag Tunnelausbau Gmbh | Process and device for drilling and lining of bore-holes |
US20060021801A1 (en) * | 2004-02-17 | 2006-02-02 | John Hughes | Retrievable center bit |
US20090101413A1 (en) * | 2005-06-10 | 2009-04-23 | Geomechanik Wasser-Und Umwelttechnik Gmbh | DTH-hammer drilling device and overburden drilling method |
US20100193250A1 (en) * | 2009-01-30 | 2010-08-05 | Tesco Corporation | Cutting Structure for Casing Drilling Underreamer |
US20110198129A1 (en) * | 2008-10-13 | 2011-08-18 | Oy Atlas Copco Rotex Ab | Method and drilling apparatus for down-the-hole drilling |
WO2017007469A1 (en) * | 2015-07-08 | 2017-01-12 | Halliburton Energy Services Inc. | Downhole mechanical percussive hammer drill assembly |
CN111579287A (zh) * | 2020-06-18 | 2020-08-25 | 河南理工大学 | 一种可分层取样的铝土矿取样装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2924392C2 (de) * | 1979-06-16 | 1982-09-23 | Brückner Grundbau GmbH, 4300 Essen | Bohrvorrichtung zum Überlagerungsbohren |
FR1094604A (es) * | 1982-03-10 | 1955-05-23 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1391344A (en) * | 1921-06-17 | 1921-09-20 | Rotinoff Alexande Georgievitch | Pile-driving apparatus |
US1861042A (en) * | 1930-04-28 | 1932-05-31 | John A Zublin | Rotary bit with hammering device |
US2873093A (en) * | 1956-09-19 | 1959-02-10 | Jersey Prod Res Co | Combined rotary and percussion drilling apparatus |
US2877984A (en) * | 1954-07-26 | 1959-03-17 | Otis A Causey | Apparatus for well drilling |
US2947519A (en) * | 1957-09-11 | 1960-08-02 | Westinghouse Air Brake Co | Percussion drill |
US3227230A (en) * | 1961-02-21 | 1966-01-04 | Atlas Copco Ab | Combination ring and central drill bit drilling equipment |
GB1068638A (en) * | 1963-09-11 | 1967-05-10 | Johnson Construction Co Ab | Drilling equipment |
US3370658A (en) * | 1964-08-11 | 1968-02-27 | Bengt K.B. Jansson | Drill and tube arrangement with knock-of drill portion |
-
1970
- 1970-05-19 GB GB1257429D patent/GB1257429A/en not_active Expired
- 1970-05-19 BE BE750586D patent/BE750586A/xx not_active IP Right Cessation
- 1970-05-19 CH CH742070A patent/CH524755A/de not_active IP Right Cessation
- 1970-05-21 AT AT456570A patent/AT296190B/de not_active IP Right Cessation
- 1970-05-21 FR FR7018557A patent/FR2049135B1/fr not_active Expired
- 1970-05-26 NL NL7007598A patent/NL7007598A/xx unknown
- 1970-05-28 US US41170A patent/US3682260A/en not_active Expired - Lifetime
- 1970-05-29 ES ES380161A patent/ES380161A1/es not_active Expired
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1391344A (en) * | 1921-06-17 | 1921-09-20 | Rotinoff Alexande Georgievitch | Pile-driving apparatus |
US1861042A (en) * | 1930-04-28 | 1932-05-31 | John A Zublin | Rotary bit with hammering device |
US2877984A (en) * | 1954-07-26 | 1959-03-17 | Otis A Causey | Apparatus for well drilling |
US2873093A (en) * | 1956-09-19 | 1959-02-10 | Jersey Prod Res Co | Combined rotary and percussion drilling apparatus |
US2947519A (en) * | 1957-09-11 | 1960-08-02 | Westinghouse Air Brake Co | Percussion drill |
US3227230A (en) * | 1961-02-21 | 1966-01-04 | Atlas Copco Ab | Combination ring and central drill bit drilling equipment |
GB1068638A (en) * | 1963-09-11 | 1967-05-10 | Johnson Construction Co Ab | Drilling equipment |
US3370658A (en) * | 1964-08-11 | 1968-02-27 | Bengt K.B. Jansson | Drill and tube arrangement with knock-of drill portion |
Cited By (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3835943A (en) * | 1972-02-25 | 1974-09-17 | R Bray | Drilling apparatus and adaptor assembly for such apparatus |
US3854539A (en) * | 1972-08-23 | 1974-12-17 | Tigre Tierra | Drilling apparatus with down hole motor |
US3874464A (en) * | 1972-08-23 | 1975-04-01 | Tigre Tierra | Processing of drilling an earth formation |
US3893524A (en) * | 1972-08-23 | 1975-07-08 | Tigre Tierra | Rotary drill rod |
US3903975A (en) * | 1972-08-23 | 1975-09-09 | Tigre Tierra | Drilling apparatus with down-the-hole motor |
US3933209A (en) * | 1972-08-23 | 1976-01-20 | Tigre Tierra, Inc. | Drilling apparatus and technique using down-hole motor |
US3870114A (en) * | 1973-07-23 | 1975-03-11 | Stabilator Ab | Drilling apparatus especially for ground drilling |
US4002213A (en) * | 1974-03-01 | 1977-01-11 | Tigre Tierra, Inc. | Down-the-hole motor for rotary drill rod and process for drilling using the same |
US3990524A (en) * | 1974-06-03 | 1976-11-09 | Tigre Tierra, Inc. | Down-the-hole motor for rotary drill rod and process for drilling using the same |
US3945444A (en) * | 1975-04-01 | 1976-03-23 | The Anaconda Company | Split bit casing drill |
US4545443A (en) * | 1977-04-29 | 1985-10-08 | Sandvik Aktiebolag | Means for drilling |
US4408669A (en) * | 1977-04-29 | 1983-10-11 | Sandvik Aktiebolag | Means for drilling |
US4183415A (en) * | 1977-11-21 | 1980-01-15 | Stenuick France | Drilling apparatus |
US4196783A (en) * | 1978-07-11 | 1980-04-08 | Lofs Verkstads Ab | Device for boring |
US4296821A (en) * | 1980-02-07 | 1981-10-27 | Leslie Larson | Drilling rig and conversion apparatus |
US4415047A (en) * | 1980-11-24 | 1983-11-15 | Adcock Gerald L | Downhole case driving apparatus for impact drills |
US4852672A (en) * | 1988-08-15 | 1989-08-01 | Behrens Robert N | Drill apparatus having a primary drill and a pilot drill |
US4979848A (en) * | 1988-11-03 | 1990-12-25 | Gerhard Sauer | Drilling device |
WO1993009328A1 (de) * | 1991-11-08 | 1993-05-13 | Renfer, Heinz | Bohrverfahren und einrichtung zur ausübung des verfahrens |
US5355966A (en) * | 1991-11-08 | 1994-10-18 | Mathis Andrea L | Drilling method and an assembly for performing the method |
AU677620B2 (en) * | 1992-12-03 | 1997-05-01 | Oy Atlas Copco Rotex Ab | Drilling apparatus |
CN1036019C (zh) * | 1992-12-03 | 1997-10-01 | 约尔马·耶尔韦拉 | 钻进装置 |
WO1994024405A1 (en) * | 1993-04-08 | 1994-10-27 | Sandvik Ab | Down-hole hammer drill having reverse circulation and drill bit for the hammer drill |
US5503224A (en) * | 1994-06-28 | 1996-04-02 | Big Iron Drilling Ltd. | Casing drive apparatus |
US5839519A (en) * | 1996-11-08 | 1998-11-24 | Sandvik Ab | Methods and apparatus for attaching a casing to a drill bit in overburden drilling equipment |
WO1998021439A1 (de) * | 1996-11-12 | 1998-05-22 | Techmo Entwicklungs- Und Vertriebs Gmbh | Verfahren und einrichtung zum gleichzeitigen bohren und auskleiden von löchern |
US6106200A (en) * | 1996-11-12 | 2000-08-22 | Techmo Entwicklungs-Und Vertriebs Gmbh | Process and device for simultaneously drilling and lining a hole |
CN1079880C (zh) * | 1996-11-12 | 2002-02-27 | 泰西莫开发销售有限公司 | 钻孔并同时加衬的方法和装置 |
EP0843073A1 (de) * | 1996-11-13 | 1998-05-20 | Gerhard Dr.-Ing. Sauer | Verfahren und Vorrichtung zum Einsetzen eines Injektionsankers |
MY119472A (en) * | 1997-12-13 | 2005-05-31 | Alwag Tunnelausbau Gmbh | Process and device for drilling and lining of bore-holes |
EP1127477A1 (en) * | 1998-11-04 | 2001-08-29 | Numa Tool Company | Method and device in down-the-hole drilling |
EP1127477A4 (en) * | 1998-11-04 | 2002-10-09 | Numa Tool Co | DOWNHOLE PERFORATION PROCESS AND DEVICE |
US6675919B2 (en) * | 2000-02-04 | 2004-01-13 | Frank's Casing Crew And Rental Tools, Inc. | Tubular piling apparatus and method |
US20060021801A1 (en) * | 2004-02-17 | 2006-02-02 | John Hughes | Retrievable center bit |
US7520343B2 (en) * | 2004-02-17 | 2009-04-21 | Tesco Corporation | Retrievable center bit |
US20090101413A1 (en) * | 2005-06-10 | 2009-04-23 | Geomechanik Wasser-Und Umwelttechnik Gmbh | DTH-hammer drilling device and overburden drilling method |
US20110198129A1 (en) * | 2008-10-13 | 2011-08-18 | Oy Atlas Copco Rotex Ab | Method and drilling apparatus for down-the-hole drilling |
US20100193250A1 (en) * | 2009-01-30 | 2010-08-05 | Tesco Corporation | Cutting Structure for Casing Drilling Underreamer |
WO2017007469A1 (en) * | 2015-07-08 | 2017-01-12 | Halliburton Energy Services Inc. | Downhole mechanical percussive hammer drill assembly |
GB2555299A (en) * | 2015-07-08 | 2018-04-25 | Halliburton Energy Services Inc | Downhole mechanical percussive hammer drill assembly |
GB2555299B (en) * | 2015-07-08 | 2019-09-11 | Halliburton Energy Services Inc | Downhole mechanical percussive hammer drill assembly |
US10415314B2 (en) | 2015-07-08 | 2019-09-17 | Halliburton Energy Services, Inc. | Downhole mechanical percussive hammer drill assembly |
CN111579287A (zh) * | 2020-06-18 | 2020-08-25 | 河南理工大学 | 一种可分层取样的铝土矿取样装置 |
CN111579287B (zh) * | 2020-06-18 | 2023-01-31 | 河南理工大学 | 一种可分层取样的铝土矿取样装置 |
Also Published As
Publication number | Publication date |
---|---|
FR2049135A1 (es) | 1971-03-26 |
GB1257429A (es) | 1971-12-15 |
AT296190B (de) | 1972-02-10 |
BE750586A (fr) | 1970-11-03 |
FR2049135B1 (es) | 1974-03-15 |
ES380161A1 (es) | 1973-02-16 |
CH524755A (de) | 1972-06-30 |
NL7007598A (es) | 1970-12-02 |
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