US2746721A - Apparatus for drilling - Google Patents
Apparatus for drilling Download PDFInfo
- Publication number
- US2746721A US2746721A US249113A US24911351A US2746721A US 2746721 A US2746721 A US 2746721A US 249113 A US249113 A US 249113A US 24911351 A US24911351 A US 24911351A US 2746721 A US2746721 A US 2746721A
- Authority
- US
- United States
- Prior art keywords
- valve
- drilling
- fluid
- drill
- mud
- 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
- 238000005553 drilling Methods 0.000 title description 21
- 239000012530 fluid Substances 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses
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)
Description
APPARATUS FOR DRILLING Thomas V; Moore, Manhasset, N. Y., assignor to Esso Research and Engineering Company, a corporation of Delaware I Application October 1, 1951, Serial No. 249,113
1 Claim. (Cl. 255-24) The present invention relates to an apparatus for drilling well bore holes. In accordance with the present invention an increased drilling speed is obtained with the aid of jets in which a valve is positioned at the bottom of the drill pipe which opens when a predetermined high pressure is imposed upon it. The valve remains open until the pressure falls to a predetermined value. By operating in this manner the energy intermittently stored in the drill pipe is effectively released in a pulsing mud jet of very high reaction.
In the exploration for oil the art of drilling well bore holes into subterranean areas of the earth has been widely investigated and extensively developed. The techniques employed are many and a wide variety of drilling bits and associated apparatus have also been developed. One conventional procedure is to attach a suitable bit on the end of a pipe string and to rotate the bit by the rotation of the pipe string.
Thus, at the present time, the majority of drilling operations are conducted by employing rotary drilling equipment. In conventional rotary drilling, a hollow jointed steel shaft called the drill stem is rotated from the surface of the earth. This shaft, extending downwardly into the earth to any desired depth, rotates a drill bit. For a number of purposes, a weighted fluid called drilling mud is circulated in one direction through the drill stem and in the opposite direction through the annulus between the drill stern and the bore hole.
In drilling operations of this character, it is also known to employ relatively high velocity jets. The jetting action is secured by imposing a pressure on the drilling fluid within the drill stern by means of surface equipment. This fluid is jetted through suitable fluid jet passageways in the bit in order to aid the drilling operation. This type of jet drilling technique is particularly suitable for securing satisfactory drilling rates when piercing ditficult rock formations. However, in the conventional jet drilling operation of the character disclosed, the efliciency of the system depends upon the reaction of the jets of mud flowing through the water courses. The reaction of the jets is limited due to frictional loss of energy such as the friction of the mud flowing through the long string of drill pipe to the bit. This frictional loss consumes a large part of the energy of the mud stream which otherwise could be used in the jetting action. In accordance with the present invention, a valve is utilized which is disposed at the lower end or bottom of the drill pipe. This valve will open when a predetermined pressure is reached within the drill pipe at which time it will open and will remain open until the pressure has dropped to a predetermined point, thus producing an effective pulsing motion of the jets.
The present invention may be readily understood by reference to the drawing illustrating one embodiment of the same. Referring specifically to the drawing, a drill stem 1 is shown disposed in well bore hole 2, which extends from the surface through subterranean formations 'ice 2 3. Attached to the lower end of drill stem 1 is a fishtail bit 4 containing fluid passageways 6. In normal operation, a drilling fluid is pumped down within the drill stem.
This fluid flows through ports 6 either in the bit itself or through other ports into the annular .area between the bore hole Wall and the outer surface ofvthe drill stemQ In accordance with the present invention, this fluid passes through fluid passageway 6 and is jetted at a high velocity in order to increase the drilling rate. In accordance with the present invention, a suitable piston valve 9 which seats at .the topof conduit 15 or its equivalent is disposed in thelower end of the drill stem. The valve assembly is positioned'within the drill stem by a suitable structural means 12 containing ports 14 so as to permit the passage of downflowing fluid. This valve remains closed until a predetermined high pressure is imposed upon it. The valve opens and remains open until the pressure falls to a predetermined value. Thus, there is secured an intermittent, high velocity pulse jet action through the jets 6 which is secured by utilizing the stored energy of the mud stream within the drill stem.
Any suitable type of valve may be employed, as for example a pintle type valve. The valve preferably operates against the action of a spring means 16. Thus, for example, as the pressure builds up on the fluid head within the drill stem, pressure is exerted against the face of the valve as illustrated by arrows 7. This pressure is exerted against the downward thrust of a spring means 8 positioned in cylinder 10. As the pressure reaches a predetermined high value, the face of the valve 9 moves off valve seat 11 at which time the area of the valve face exposed to the thrust of the mud increases abruptly due to the design of the valve, thus, materially and rapidly increasing the total force on the face of the valve. The effect of this is to have the valve in effect snap open rapidly. The entire valve mechanism 9 comprising a piston element, moves upwardly in cylinder element 10 against the force of spring element 8.
As the mud pressure is released after a certain quantity of fluid is jetted through ports 6, the valve starts to close and then snaps back rapidly for the reasons given heretofore. The entire valve assembly is rigidly positioned in the bottom of drill stem 1 by suitable brace elements 12, which brace elements permit the mud fluid to flow freely past the same. In order to permit satisfactory operation of the valve mechanism and to equalize the effect of the fluid head of mud in the area between the drill stem and the bore hole with that of the fluid head of the mud within the drill stem, a port element 13 is provided which communicates between the area in the cylinder and the area between the drill stem and the bore hole wall. Thus, the thrust of the fluid head within the drill stem exerted on the face of valve 9 is equalized by the thrust of the fluid mud head between the drill stem and the bore hole wall exerted through port 13 and on the base of valve 9 in the cylinder. It is also within the concept of the present invention to provide a mechanical or pneumatic surge tank to store hydraulic energy of the mud in the lower part of the drill pipe.
The present invention is broadly concerned With apparatus for providing a pulsing, jetting action of the fluid from the drill bit. This is provided by the operation of a mechanical valve which remains closed until a predetermined relatively high pressure is reached. At this point the valve, due to its design, snaps open thus releasing the stored energy of the mud through the jets, thus providing a jet action. At a predetermined point, the valve snaps closed and the cycle is repeated. The number of cycles per minute may vary appreciably depending upon the particular structure being drilled as well as upon other related factors, such as the rotational speed of drilling. A satisfactory drilling rate is from about 80 to 150, preferably, from about 120 to 140 revolutions per minute. Under these conditions, it is desirable to jet the fluid from about 1 to 10, preferably from about 2 to 5 times per revolution.
By operating in accordance with the present invention, a pump of relatively small horse power may be employed to store hydraulic energy in the drill pipe for a period of time and then cause the energy so stored, to be released in mud jet of very high reaction, which would appreciably increase the speed of drilling.
What is claimed is:
In an apparatus for drilling bore holes into subterranean surfaces an improved drill bit assembly which comprises a drill bit attached to the lower end of a pipe string, ports in said bit communicating by means of a common conduit to within said pipe string, a valve assembly positioned above said bit and concentrically disposed within said pipe string comprising a piston element which seats on a seat formed at the juncture of said conduit and a surface of the bit, and a cylinder element in which said piston element slides, said cylindrical element being rigidly positioned with respect to said pipe string by suitable brace elements, a vent communicating from within said cylindrical element above said piston to without said pipe string, a spring means positioned within said cylindrical element so as to exert a downward thrust on the piston element so as to seat the piston element in said seat, thereby controlling the flow of fluid through said conduit, said piston element being characterized by being upwardly flared and extending above said seat, whereby a predetermined lateral force exerted by the fluid head within said pipe string will exert an upward thrust component on said piston valve element which will exceed the downward thrust exerted by said spring means, whereby said piston element will move upwardly and allow free communication through said common conduit.
References Cited in the file of this patent UNITED STATES PATENTS 842,049 Wolski Jan. 22, 1907 1,853,379 Rotinotf Apr. 12, 1932 2,045,368 Reed June 23, 1936 2,422,031 Merten June 10, 1947 2,507,585 Bassinger May 16, 1950
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US249113A US2746721A (en) | 1951-10-01 | 1951-10-01 | Apparatus for drilling |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US249113A US2746721A (en) | 1951-10-01 | 1951-10-01 | Apparatus for drilling |
Publications (1)
Publication Number | Publication Date |
---|---|
US2746721A true US2746721A (en) | 1956-05-22 |
Family
ID=22942111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US249113A Expired - Lifetime US2746721A (en) | 1951-10-01 | 1951-10-01 | Apparatus for drilling |
Country Status (1)
Country | Link |
---|---|
US (1) | US2746721A (en) |
Cited By (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2905439A (en) * | 1957-02-06 | 1959-09-22 | Leo A Martini | Means for drilling |
US2972981A (en) * | 1960-04-18 | 1961-02-28 | Ingersoll Rand Co | Rock drill |
US3065805A (en) * | 1958-12-15 | 1962-11-27 | Leo A Martini | Apparatus for drilling wells |
US3101796A (en) * | 1960-11-14 | 1963-08-27 | Pan American Petroleum Corp | Fluid-driven percussion motor |
US3105560A (en) * | 1960-01-04 | 1963-10-01 | Maria N Zublin | Weight controlled vibratory drilling device |
US3132704A (en) * | 1960-12-05 | 1964-05-12 | Bassinger Tool Company | Fluid actuated impact tool |
US3144087A (en) * | 1961-01-05 | 1964-08-11 | Edward B Williams Iii | Drill bit with tangential jet |
US3346058A (en) * | 1964-05-29 | 1967-10-10 | Gen Dynamics Corp | Acoustic apparatus |
US4114705A (en) * | 1976-05-26 | 1978-09-19 | Societe B.V.S. | Rock drilling tool having pulsed jets |
US4221271A (en) * | 1978-04-10 | 1980-09-09 | The Curators Of The University Of Missouri | Water jet cutting nozzle transition section |
EP0333484A2 (en) * | 1988-03-18 | 1989-09-20 | Intech International Inc. | Flow pulsing apparatus for down-hole drilling equipment |
US4979577A (en) * | 1983-07-08 | 1990-12-25 | Intech International, Inc. | Flow pulsing apparatus and method for down-hole drilling equipment |
US5009272A (en) * | 1988-11-25 | 1991-04-23 | Intech International, Inc. | Flow pulsing method and apparatus for drill string |
US5190114A (en) * | 1988-11-25 | 1993-03-02 | Intech International Inc. | Flow pulsing apparatus for drill string |
WO1998048141A1 (en) * | 1997-04-24 | 1998-10-29 | Andergauge Limited | Downhole apparatus |
US6460620B1 (en) * | 1999-11-29 | 2002-10-08 | Weatherford/Lamb, Inc. | Mudsaver valve |
US6722454B2 (en) * | 2000-02-24 | 2004-04-20 | Techmo Entwicklungs- Und Vertriebs Gmbh | Device for drilling, in particular percussion drilling or rotary percussion drilling, boreholes |
US20070187112A1 (en) * | 2003-10-23 | 2007-08-16 | Eddison Alan M | Running and cementing tubing |
US20070242565A1 (en) * | 2005-11-21 | 2007-10-18 | Hall David R | Downhole Pressure Pulse Activated by Jack Element |
US20080142263A1 (en) * | 2006-03-23 | 2008-06-19 | Hall David R | Downhole Valve Mechanism |
US20090183919A1 (en) * | 2005-11-21 | 2009-07-23 | Hall David R | Downhole Percussive Tool with Alternating Pressure Differentials |
US20090223676A1 (en) * | 2006-07-08 | 2009-09-10 | Alan Martyn Eddison | Selective Agitation |
US20100212912A1 (en) * | 2005-01-14 | 2010-08-26 | Alan Martyn Eddison | Valve |
US20100270034A1 (en) * | 2007-11-20 | 2010-10-28 | National Oilwell Varco, L.P. | Wired multi-opening circulating sub |
US20110048811A1 (en) * | 2005-11-21 | 2011-03-03 | Schlumberger Technology Corporation | Drill bit with a retained jack element |
US7954401B2 (en) | 2006-10-27 | 2011-06-07 | Schlumberger Technology Corporation | Method of assembling a drill bit with a jack element |
US8281882B2 (en) | 2005-11-21 | 2012-10-09 | Schlumberger Technology Corporation | Jack element for a drill bit |
US8297378B2 (en) | 2005-11-21 | 2012-10-30 | Schlumberger Technology Corporation | Turbine driven hammer that oscillates at a constant frequency |
US8360174B2 (en) | 2006-03-23 | 2013-01-29 | Schlumberger Technology Corporation | Lead the bit rotary steerable tool |
US8499857B2 (en) | 2007-09-06 | 2013-08-06 | Schlumberger Technology Corporation | Downhole jack assembly sensor |
US8522897B2 (en) | 2005-11-21 | 2013-09-03 | Schlumberger Technology Corporation | Lead the bit rotary steerable tool |
US8528664B2 (en) | 2005-11-21 | 2013-09-10 | Schlumberger Technology Corporation | Downhole mechanism |
US8701799B2 (en) | 2009-04-29 | 2014-04-22 | Schlumberger Technology Corporation | Drill bit cutter pocket restitution |
US9033067B2 (en) | 2012-12-03 | 2015-05-19 | CNPC USA Corp. | Vibrational tool with rotating engagement surfaces and method |
US9121224B2 (en) | 2012-12-03 | 2015-09-01 | CNPC USA Corp. | Vibrational tool with tool axis rotational mass and method |
US9121225B2 (en) | 2012-12-03 | 2015-09-01 | CNPC USA Corp. | Drill bit housing vibrator and method |
US9175535B2 (en) | 2011-09-29 | 2015-11-03 | Coil Solutions, Inc. | Propulsion generator and method |
US9637976B2 (en) | 2012-12-13 | 2017-05-02 | Tll Oilfield Consulting Ltd. | Downhole drilling tool |
US9765584B2 (en) | 2013-12-03 | 2017-09-19 | Tll Oilfield Consulting Ltd. | Flow controlling downhole tool |
US10801264B2 (en) | 2015-08-20 | 2020-10-13 | Impulse Downhole Solutions Ltd. | On-bottom downhole bearing assembly |
US10968721B2 (en) | 2016-07-07 | 2021-04-06 | Impulse Downhole Solutions Ltd. | Flow-through pulsing assembly for use in downhole operations |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US842049A (en) * | 1906-06-22 | 1907-01-22 | Waclaw Wolski | Hydraulic drill. |
US1853379A (en) * | 1926-12-29 | 1932-04-12 | Alexander G Rotinoff | Caisson and method of and means for sinking the same |
US2045368A (en) * | 1934-05-18 | 1936-06-23 | Earl A Reed | Earth boring drill |
US2422031A (en) * | 1944-06-19 | 1947-06-10 | Shell Dev | Hydraulic well drilling device |
US2507585A (en) * | 1946-07-26 | 1950-05-16 | Bassinger Ross | Percussion tool for wells |
-
1951
- 1951-10-01 US US249113A patent/US2746721A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US842049A (en) * | 1906-06-22 | 1907-01-22 | Waclaw Wolski | Hydraulic drill. |
US1853379A (en) * | 1926-12-29 | 1932-04-12 | Alexander G Rotinoff | Caisson and method of and means for sinking the same |
US2045368A (en) * | 1934-05-18 | 1936-06-23 | Earl A Reed | Earth boring drill |
US2422031A (en) * | 1944-06-19 | 1947-06-10 | Shell Dev | Hydraulic well drilling device |
US2507585A (en) * | 1946-07-26 | 1950-05-16 | Bassinger Ross | Percussion tool for wells |
Cited By (57)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2905439A (en) * | 1957-02-06 | 1959-09-22 | Leo A Martini | Means for drilling |
US3065805A (en) * | 1958-12-15 | 1962-11-27 | Leo A Martini | Apparatus for drilling wells |
US3105560A (en) * | 1960-01-04 | 1963-10-01 | Maria N Zublin | Weight controlled vibratory drilling device |
US2972981A (en) * | 1960-04-18 | 1961-02-28 | Ingersoll Rand Co | Rock drill |
US3101796A (en) * | 1960-11-14 | 1963-08-27 | Pan American Petroleum Corp | Fluid-driven percussion motor |
US3132704A (en) * | 1960-12-05 | 1964-05-12 | Bassinger Tool Company | Fluid actuated impact tool |
US3144087A (en) * | 1961-01-05 | 1964-08-11 | Edward B Williams Iii | Drill bit with tangential jet |
US3346058A (en) * | 1964-05-29 | 1967-10-10 | Gen Dynamics Corp | Acoustic apparatus |
US4114705A (en) * | 1976-05-26 | 1978-09-19 | Societe B.V.S. | Rock drilling tool having pulsed jets |
US4221271A (en) * | 1978-04-10 | 1980-09-09 | The Curators Of The University Of Missouri | Water jet cutting nozzle transition section |
US4979577A (en) * | 1983-07-08 | 1990-12-25 | Intech International, Inc. | Flow pulsing apparatus and method for down-hole drilling equipment |
EP0333484A3 (en) * | 1988-03-18 | 1990-03-28 | Intech International Inc. | Flow pulsing apparatus for down-hole drilling equipment |
EP0333484A2 (en) * | 1988-03-18 | 1989-09-20 | Intech International Inc. | Flow pulsing apparatus for down-hole drilling equipment |
US5009272A (en) * | 1988-11-25 | 1991-04-23 | Intech International, Inc. | Flow pulsing method and apparatus for drill string |
US5190114A (en) * | 1988-11-25 | 1993-03-02 | Intech International Inc. | Flow pulsing apparatus for drill string |
GB2348910B (en) * | 1997-04-24 | 2001-10-10 | Andergauge Ltd | Downhole apparatus |
GB2348910A (en) * | 1997-04-24 | 2000-10-18 | Andergauge Ltd | Downhole apparatus |
WO1998048141A1 (en) * | 1997-04-24 | 1998-10-29 | Andergauge Limited | Downhole apparatus |
US6439318B1 (en) | 1997-04-24 | 2002-08-27 | Andergauge Limited | Downhole apparatus |
US6460620B1 (en) * | 1999-11-29 | 2002-10-08 | Weatherford/Lamb, Inc. | Mudsaver valve |
US6722454B2 (en) * | 2000-02-24 | 2004-04-20 | Techmo Entwicklungs- Und Vertriebs Gmbh | Device for drilling, in particular percussion drilling or rotary percussion drilling, boreholes |
US20070187112A1 (en) * | 2003-10-23 | 2007-08-16 | Eddison Alan M | Running and cementing tubing |
US9637991B2 (en) | 2003-10-23 | 2017-05-02 | Nov Downhole Eurasia Limited | Running and cementing tubing |
US20100212900A1 (en) * | 2003-10-23 | 2010-08-26 | Andergauge Limited | Running and Cement Tubing |
US8069926B2 (en) | 2005-01-14 | 2011-12-06 | Andergauge Limited | Method of controlling flow through a drill string using a valve positioned therein |
US20100212912A1 (en) * | 2005-01-14 | 2010-08-26 | Alan Martyn Eddison | Valve |
US8528664B2 (en) | 2005-11-21 | 2013-09-10 | Schlumberger Technology Corporation | Downhole mechanism |
US20080142265A1 (en) * | 2005-11-21 | 2008-06-19 | Hall David R | Downhole Mechanism |
US8522897B2 (en) | 2005-11-21 | 2013-09-03 | Schlumberger Technology Corporation | Lead the bit rotary steerable tool |
US20090183919A1 (en) * | 2005-11-21 | 2009-07-23 | Hall David R | Downhole Percussive Tool with Alternating Pressure Differentials |
US7464772B2 (en) * | 2005-11-21 | 2008-12-16 | Hall David R | Downhole pressure pulse activated by jack element |
US20070242565A1 (en) * | 2005-11-21 | 2007-10-18 | Hall David R | Downhole Pressure Pulse Activated by Jack Element |
US20110048811A1 (en) * | 2005-11-21 | 2011-03-03 | Schlumberger Technology Corporation | Drill bit with a retained jack element |
US8297378B2 (en) | 2005-11-21 | 2012-10-30 | Schlumberger Technology Corporation | Turbine driven hammer that oscillates at a constant frequency |
US7967082B2 (en) * | 2005-11-21 | 2011-06-28 | Schlumberger Technology Corporation | Downhole mechanism |
US8950517B2 (en) | 2005-11-21 | 2015-02-10 | Schlumberger Technology Corporation | Drill bit with a retained jack element |
US8281882B2 (en) | 2005-11-21 | 2012-10-09 | Schlumberger Technology Corporation | Jack element for a drill bit |
US8225883B2 (en) | 2005-11-21 | 2012-07-24 | Schlumberger Technology Corporation | Downhole percussive tool with alternating pressure differentials |
US8360174B2 (en) | 2006-03-23 | 2013-01-29 | Schlumberger Technology Corporation | Lead the bit rotary steerable tool |
US7762353B2 (en) * | 2006-03-23 | 2010-07-27 | Schlumberger Technology Corporation | Downhole valve mechanism |
US20080142263A1 (en) * | 2006-03-23 | 2008-06-19 | Hall David R | Downhole Valve Mechanism |
US8167051B2 (en) | 2006-07-08 | 2012-05-01 | National Oilwell Varco, L.P. | Selective agitation |
US20090223676A1 (en) * | 2006-07-08 | 2009-09-10 | Alan Martyn Eddison | Selective Agitation |
US7954401B2 (en) | 2006-10-27 | 2011-06-07 | Schlumberger Technology Corporation | Method of assembling a drill bit with a jack element |
US8499857B2 (en) | 2007-09-06 | 2013-08-06 | Schlumberger Technology Corporation | Downhole jack assembly sensor |
US8863852B2 (en) | 2007-11-20 | 2014-10-21 | National Oilwell Varco, L.P. | Wired multi-opening circulating sub |
US20100270034A1 (en) * | 2007-11-20 | 2010-10-28 | National Oilwell Varco, L.P. | Wired multi-opening circulating sub |
US8701799B2 (en) | 2009-04-29 | 2014-04-22 | Schlumberger Technology Corporation | Drill bit cutter pocket restitution |
US9175535B2 (en) | 2011-09-29 | 2015-11-03 | Coil Solutions, Inc. | Propulsion generator and method |
US9033067B2 (en) | 2012-12-03 | 2015-05-19 | CNPC USA Corp. | Vibrational tool with rotating engagement surfaces and method |
US9121224B2 (en) | 2012-12-03 | 2015-09-01 | CNPC USA Corp. | Vibrational tool with tool axis rotational mass and method |
US9121225B2 (en) | 2012-12-03 | 2015-09-01 | CNPC USA Corp. | Drill bit housing vibrator and method |
US9637976B2 (en) | 2012-12-13 | 2017-05-02 | Tll Oilfield Consulting Ltd. | Downhole drilling tool |
US9765584B2 (en) | 2013-12-03 | 2017-09-19 | Tll Oilfield Consulting Ltd. | Flow controlling downhole tool |
US10801264B2 (en) | 2015-08-20 | 2020-10-13 | Impulse Downhole Solutions Ltd. | On-bottom downhole bearing assembly |
US10968721B2 (en) | 2016-07-07 | 2021-04-06 | Impulse Downhole Solutions Ltd. | Flow-through pulsing assembly for use in downhole operations |
US11788382B2 (en) | 2016-07-07 | 2023-10-17 | Impulse Downhole Solutions Ltd. | Flow-through pulsing assembly for use in downhole operations |
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