WO2000055468A1 - Directional drilling system for hard rock - Google Patents
Directional drilling system for hard rock Download PDFInfo
- Publication number
- WO2000055468A1 WO2000055468A1 PCT/AU2000/000183 AU0000183W WO0055468A1 WO 2000055468 A1 WO2000055468 A1 WO 2000055468A1 AU 0000183 W AU0000183 W AU 0000183W WO 0055468 A1 WO0055468 A1 WO 0055468A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- assembly
- bottom hole
- drill
- further including
- bit
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 32
- 239000011435 rock Substances 0.000 title claims abstract description 21
- 239000003381 stabilizer Substances 0.000 claims abstract description 42
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 230000035939 shock Effects 0.000 claims abstract description 9
- 230000033001 locomotion Effects 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000009527 percussion Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000000670 limiting effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000006096 absorbing agent Substances 0.000 abstract 1
- 230000007246 mechanism Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
-
- 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
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/068—Deflecting the direction of boreholes drilled by a down-hole drilling motor
Definitions
- the present invention relates in general to an arrangement of a bottom hole assembly where boreholes can be drilled in a directionally controllable manner, utilizing existing down-hole hammer drills. More particularly, the present invention pertains to apparatus for providing directionally controlled boreholes in hard rock.
- the bottom hole assembly can be rotated, in which event the bit cuts a straight trajectory; and (e) the use of a bottom hole assembly which does not rotate and which includes pads that can be forced against the borehole wall in a controllable fashion.
- a drill bit which can be rotated either by a down-hole motor or by an extension of a rotating drill string which passes through the bottom hole assembly.
- the pads on the bottom hole assembly can be actuated differentially to force the drill bit to cut with a lateral component and thus change the trajectory of the borehole.
- Most of the systems employed to change borehole trajectories are more suited for use in softer formations because they all use a rotating drill bit to cut rock.
- a higher cutting rate is achieved by hammering a rock bit at the end of the borehole in a reciprocating manner. In deeper holes this is effectively accomplished by the use of a down- hole hammer which is powered by drilling fluid.
- the fluid is commonly compressed air but may be water or some other fluid.
- directional drilling in hard rock can be accomplished by the use of a similar cutting mechanism.
- the present invention utilizes standard fluid powered down-hole hammers to drill directional boreholes.
- the down-hole hammer forms part of a bottom hole assembly.
- the direction of the down-hole hammer is disposed at an angle with respect to the axis of an up-hole section of the bore, and preferably tangential to the direction of the section of borehole being drilled.
- the hammer bit which has little side cutting capability, drills in the direction in which it is pointed. This is achieved by the use of a combination of bends and stabilizers including offset stabilizers, which form part of the down-hole assembly.
- the direction is out of alignment with the previously drilled up-hole section as a consequence of the forward movement of the bottom hole assembly and in response to the bend and/or offset stabilizers.
- the direction of angular build is in the plane of the bend(s) of the bottom hole assembly and in the direction of the tool face angle.
- the angular build may be governed by the stabilizer offset alone.
- the tool face angle is a projection of the direction in which the drill bit points on a plane perpendicular to the borehole, when viewed from the rear of the bottom hole assembly, toward the bit.
- the rate of angular build in terms of change of angle per unit length drilled is controlled by the geometry of the stabilizers and the bit, their relative positions, and the angular offset of the bottom hole assembly.
- the bit For a hammer drill to operate, the bit must be rotated to a certain extent so that the buttons or chisels on the drill bit strike new areas of rock not previously struck during the bit's reciprocating motion. This is achieved in normal non-directional hammer drilling operations by rotating the drill string, and with it the down-hole hammer and drill bit.
- the bend in the bottom hole assembly imparts an angular build direction to the drill path when it is held at a constant tool face angle.
- the tool face angle should be held constant. Therefore, a mechanism has been incorporated into the bottom hole assembly to achieve the rotation of the bit (and in this case the down-hole hammer), independent of the remaining bottom hole assembly.
- Hammer drills are designed to drill straight ahead and it is preferable to arrange the geometry of the bit, hammer, housing and stabilizers of the bottom hole assembly so that this remains the situation in the case of a directional down-hole hammer. In an embodiment of the invention, this is achieved by offsetting the projected center line of the down-hole hammer within the first stabilizer located behind the bit and down-hole hammer.
- the theoretical relation between angular build rate and the bottom hole assembly geometry can be represented mathematically.
- the intermediate bend can be removed so that the bit, down-hole hammer and housing are concentric about a common axis.
- the rear end of the bottom hole assembly is held eccentrically within the borehole by a stabilizer.
- Other stabilizers may be located between the bit and the rear stabilizer to maintain this offset position within the borehole.
- the hammer remains aligned tangentially to the curved hole at the location of the bit and therefore a curved borehole will be drilled.
- the bend may be exaggerated to force the bit toward the inside of the bend and thus tend to decrease the radius of the borehole being drilled.
- the entire bottom hole assembly can be rotated so that the tool face angle continuously changes during rotation. In this mode, the bottom hole assembly will drill a more or less straight but slightly oversize borehole. An angled hole using this assembly will tend to droop. If, however, the embodiment of the bottom hole assembly without the intermediate bend is rotated, it will tend to drill a straight hole which is not oversize.
- the mechanism employed to rotate the down-hole hammer and bit involves attaching the down-hole hammer to the remainder of the bottom hole assembly by the use of a sub and bearing pack.
- a motor/gearbox assembly is incorporated into the bottom hole assembly and rotates the sub connected to the down-hole hammer and the bit.
- the drive is accomplished through a flexible or articulated coupling. This need not be the case for the straight version according to another embodiment. Even though the drill string and bottom hole assembly are held at a fixed tool face angle, the down-hole hammer will be rotated by the motor and gearbox. The bottom hole assembly will thus be capable of drilling a hole with an angular build characteristic.
- the preferred form of the drive motor employed to rotate the hammer and bit is one which is powered by a pressurized fluid flowing in the drill string. This would in most cases be compressed air or gas, but can be other fluids. When compressed air is used to power the hammer, a vane motor can be utilized. When liquid is used, a positive displacement helical rotor progressing cavity fluid motor can be utilized. In either case, the drive motors could be advantageously coupled through a series of epicyclic gearboxes used as torque multipliers to the sub and the down-hole hammer.
- the coupling between the down-hole motor/gearbox combination and the hammer should be of the type that removes shock and withstands the torque generated when the hammer bit stops rotating. In the case of normal operations, the rotation of the bit will be momentarily interrupted each time the bit strikes the bottom of the borehole. In order to avoid excessive shock to the motor gearbox drive train, there is utilized an elastomeric coupling to absorb the rotational interruptions of the bit. In the event that the bit jams in the hole and the hammer is suddenly caused to stop rotating, an excessive torque may be developed in the motor/gearbox and coupling assembly due to the rotational inertia of the components contained therein. To avoid such adverse torque, it has been found to be advantageous to use a torque limiting clutch in the coupling assembly between the gearbox and the sub which rotates the hammer and bit.
- the rotational speed of the hammer and reciprocating bit with respect to the remainder of the bottom hole assembly should be controlled to optimize the penetration rate for different types of rock formations.
- This is accomplished by means of a control module which contains some form of rotational speed governor that controls fluid flow through the motor.
- This may be pre-set or alternatively may be adjusted by means of electrical or fluid control signals conveyed from the collar of the borehole through a rod drill string to the control module containing such a governor.
- the fluid used to drive the rotational motor may be conveyed directly thereto by means of a tube disposed within the main drill string, such as the type used in reverse circulation drilling.
- the invention incorporates a unidirectional clutch mechanism which preferably takes the form of a ratchet and pawl mechanism. This enables the motor/gearbox assembly to rotate the hammer/bit combination freely. However, in the event the bit jams, torque can be transmitted through the drill string, bottom assembly housing to the sub, and therethrough to the hammer and the bit.
- the bottom hole assembly would normally contain a borehole survey tool to measure the azimuth, inclination and tool face angle of the bottom hole assembly.
- Geophysical probes can also be used in the survey tool module to enable detection of the types of rock being drilled.
- Communications between the borehole collar and the bottom hole assembly are desirable to make use of the information from the survey tool and from any geophysical probes contained in the bottom hole assembly. Also, communications to the bottom hole assembly permit adjustment of any governor incorporated in the motor speed control module.
- the simplest manner by which this information is transferred, and one which will work with compressed air as the drilling fluid, is by using electrical signals which pass through a series of insulated conductive rods contained within the drill string. These can be arranged so that the conductive rods become electrically continuous when the drill string sections are coupled together. When, however, the drill string is pulled to the surface, the conductive rods can be disconnected as each tool joint is broken, but yet remain fixed within each section of the drill string.
- An alternative method used by the invention to transmit information along the rod string is by radio transmission which is preferably in the microwave range.
- the drill rods When used in this manner, the drill rods function as waveguides.
- Fig. 1 shows a partial section of the bottom hole assembly
- Fig. 2 illustrates an extension of Fig. 1, with the bottom hole assembly connected to a drill string and containing a conductive rod for electronic communications;
- Fig. 3 depicts an alternative form of the bottom hole assembly without a mid-housing bend, but with an offset rear stabilizer and a bend situated behind the stabilizer;
- Fig. 4 is a sectional view of the control module constructed according to the invention.
- Fig. 5 illustrates the geometry of the bottom hole assembly together with the equations for calculating important parameters.
- Fig. 1 illustrates the elements of the bottom hole assembly according to one embodiment of the invention. For convenience and purposes of clarity, details of threaded or other conventional connections are not shown. In use, the bottom hole assembly would be connected to drill string sections that are coupled together in the traditional manner.
- a hammer drill bit 1 is driven in a reciprocatory manner by a down-hole hammer 2 which may be either driven by a liquid or gas medium.
- the fluid-driven hammer 2 typically produces 1,500-1,800 impacts per minute.
- Conventional air-driven hammers adapted for drilling operations are described in the paper titled Directional Air Hammer can Eliminate Expensive Location Costs, by Bui, et al., presented at the CADE/CAODC Spring Drilling Conference in Calgary, Canada on April 8-10, 1997, which paper refers to the Smith International Patents identified above, and the disclosures of which are all incorporated herein by reference.
- a sub 3 to which the hammer 2 is attached rotates within a bottom hole housing 4.
- the sub 3 is maintained in alignment in the housing 4 by a bearing pack comprising an axial thrust bearing 5, a radial bearing 6 and an axial bearing 7 retained by a nut 8.
- the housing 4 is tubular and is formed with a slight bend therein. The housing 4 can be bent at an angle in the range of about 0.1 °-2.0°.
- the sub 3 is rotationally driven by a motor 14, via a gearbox 13, shaft 12, torque limiting clutch 11 and shock absorbing coupling 10 and flexible coupling 9.
- the motor 14 and gear reduction gear box 13 together provide sufficient torque for rotating the assembly to which it is connected, including the reciprocating hammer 2 and the rock bit 1.
- the motor output operates at about 10,000 rpm, and the gear reduction ratio is about 500: 1.
- the output of this assembly is thus about 20 rpm. In other applications, it might be advantageous to use an air- driven piston motor.
- the flexible coupling 9 may be of several forms including universal joint, constant velocity joint, elastomeric coupling or flexible shaft.
- the shock absorbing coupling 10 would preferably be an elastomeric device and may be combined with the flexible coupling 9.
- the motor 14 preferentially draws pressurized fluid from the annulus within the housing 4. This fluid may be drawn through and/or discharged through an optional control module 15.
- the motor drive fluid is either discharged via a port (not shown) in the housing 4 into the borehole, or downstream of a flow restriction (not shown) in the housing 4.
- the fluid path is therefore down the drill string into the annulus, around an electronic survey package 16, control module 15, motor 14, gearbox 13, shaft 12, torque limiting clutch 11, shock absorbing coupling 10, flexible coupling 9 and through a port 17 in sub 3, into the down-hole hammer 2 and out through the bit 1 into the borehole.
- Some fluid passes into the control module 15 and then into the motor 14, or vice versa, and then back into the housing 4 or out of a port in the wall of the housing 4.
- the trajectory of the borehole is controlled by the position and diameter of the bit 1, a frontal thrust pad/stabilizer 18 and a rear stabilizer 19.
- the choice of separation between this apparatus and the angle of the bend in the housing 4 governs the rate of angular build of the bottom hole assembly.
- the frontal thrust pad/stabilizer 18 transfers the component of force that acts out of line with the drill string to the borehole wall. It should be noted that the center line of the bit 1 and down-hole hammer 2 projects to an eccentric position within the borehole at the location of the pad/stabilizer 18.
- the borehole survey module 16 is used to determine the position of the borehole geometrically and/or by geophysical measurements and calculations.
- a rod 21 in one drill string section permits electronic connections to other similar rods, and therethrough permits communications with the borehole collar.
- the rod functions as an antenna for radio communication up the drill string. This is preferably achieved in the microwave range using the drill string rod as a waveguide.
- a threaded tool joint 20 is located at the rear of the assembly.
- the stabilizers 18 and 19 are of conventional design and are made slightly under the gauge of the borehole to avoid jamming in the borehole.
- the drill string may be twisted up hole at the borehole collar, thus transferring a significant amount of torque to the directional assembly through the tool joint 20, to the bottom hole assembly housing 4 through the one-way clutch 22, to the sub 3 and thence to the down-hole hammer 2 and bit 1.
- the one-way or unidirectional clutch 22 preferably takes the form of a ratchet and pawl assembly and is designed to permit free turning of the sub 3 under the normal rotational drive supplied by the motor and gearbox.
- Fig. 2 illustrates another embodiment of an extension of a section of a bottom hole assembly connected to a drill rod string 24 which contains communications rods 23 fixed in each section of the drill string.
- the communication rods 23 are connectorized to couple automatically on the assembly of the sections of the drill string and thus permit electronic communication between the bottom hole assembly and the up-hole borehole collar.
- the communication rods 23 are preferably insulated with ends held concentric within the drill string section, and fitted with an insulated connector that is sealed against fluid ingress.
- Fig. 3 is an alternative embodiment of a simplified bottom hole assembly.
- This bottom hole assembly omits the bend in the housing 4 and the forward pad/stabilizer 18 shown in Figs. 1 and 2, although the forward pad/stabilizer can be retained.
- the bit 1 is connected to the down-hole hammer 2 which is in turn connected to the sub 3 and housing 4 which are held in an eccentric position within the borehole by a rear stabilizer 19.
- the housing 4 contains the rotational control and survey mechanisms as shown in Fig. 1.
- the drill string 24 is threadably connected to the housing 4.
- This connection 25 may optionally be flexible so as to transmit torque and thrust, but not to develop significant bending moments at the junction between the drill string 24 and the housing 4.
- the connection 25 may be manufactured in such a way that it includes a pre-formed bend to limit the lateral force developed on the outer side of the borehole, or indeed to force the bit towards the inner side of the borehole.
- the bend connection 25 may also be used in the form of assembly containing a bend and shown in Figs. 1 and 2.
- FIGURE 4 illustrates an embodiment of the control module 15.
- the control module 15 regulates the flow rate of fluid and thus the speed of the motor 14, the pressure developed across the motor 14, and hence the torque that it can develop.
- pressurized fluid passes from the right to the left.
- the fluid which normally may be compressed air, travels from the drill rods 23 through the tool joint 20 and through the drilled ports 30 to the left in FIGURE 4.
- the fluid is able to reach the chamber 28 adjacent to the piston 29 through port 27 formed in cap 26.
- the piston 29 is attached to a shaft 41 which forms a needle valve that is adjustably threaded into the piston 29.
- Some of the fluid is abstracted through ports in a filter 31 and therefrom into port 33 formed in adaptor 32.
- the adapter 32 is disposed between the regulator part of the control module 15 and the motor 14. The fluid then passes through an orifice 34 which restricts the flow rate of the fluid reaching the motor 14 and hence the peak speed of the motor 14.
- Return fluid from the motor 14 passes through a passage 35 into a chamber 36 in the adaptor 32 and then on through ports 37, 38 and 39.
- the return fluid then passes between the pointed tip of the shaft 41 and seat 40, and out of passage 42 into the borehole.
- a number of belville washers 43 force the piston 29 to the right.
- the pressure regulating function of the control module 15 is achieved by the movement of the piston 29 and with it the needle valve end of the shaft 41 from its seat 40.
- This controllable flow restrictor functions to regulate the outlet pressure of the motor 14 at a set pressure below the inlet pressure.
- the pressure is determined by the spring force developed across the belville washers 43 before the needle valve portion of the shaft 41 closes on the seat pressure P2 in chamber 44, plus the spring force exerted by the belville washers 43. If the pressure P2 in chamber 44 drops, as compared to the pressure PI in chamber 28, then the piston 29 and shaft 41 move to the left, thereby closing the outlet between shaft 41 and seat 40. This action restores the pressure balance.
- the rear stabilizer 19 shown in FIGURE 4 is of the offset type in which the opening therein is not centered within the stabilizer 19. Rather, the top stabilizer portion shown in
- FIGURE 4 extends radially outwardly more than the bottom stabilizer portion.
- the stabilizer 19 is otherwise of conventional design with axial surface grooves machined therein to allow for fluid to pass therethrough.
- Fig. 5 illustrates the geometry and equations of bottom hole assembly during operation thereof
- the bottom hole assembly is characterized by the bit 1, thrust pad/stabilizer 18, rear stabilizer 19, the distance LI between 18 and 19, the distance L2 between the thrust pad/stabilizer 18 and the bit 1 and the acute angle ⁇ . This assembly is illustrated drilling a borehole with a radius R.
- the offsets of the center line of the assembly from the centre line of the borehole at the thrust pad/stabilizer 18 is r 01 and at the stabilizer 19 is r 03 .
- the offset of the center line of the leg LI from the center line of the borehole is r 02 .
- the equations presented in the drawing describe the geometrical relationships. In the event that the assembly is straight without thrust pad/stabilizer 18 as described in Fig. 3, then the equations simplify but the form shown remains correct.
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU31347/00A AU3134700A (en) | 1999-03-15 | 2000-03-14 | Directional drilling system for hard rock |
CA002365874A CA2365874A1 (en) | 1999-03-15 | 2000-03-14 | Directional drilling system for hard rock |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12447099P | 1999-03-15 | 1999-03-15 | |
US60/124,470 | 1999-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000055468A1 true WO2000055468A1 (en) | 2000-09-21 |
Family
ID=22415086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2000/000183 WO2000055468A1 (en) | 1999-03-15 | 2000-03-14 | Directional drilling system for hard rock |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU3134700A (en) |
CA (1) | CA2365874A1 (en) |
WO (1) | WO2000055468A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1331359A1 (en) * | 2002-01-29 | 2003-07-30 | Ingenjörsfirman Geotech Ab | Probing device with microwave transmission |
WO2005113928A2 (en) | 2004-05-21 | 2005-12-01 | Vermeer Manufacturing Company | System for directional boring including a drilling head with overrunning clutch and method of boring |
GB2454997A (en) * | 2006-07-11 | 2009-05-27 | Russell Oil Exploration Ltd | Directional drilling control assembly utilising an electromagnetic torque device |
JP2013158809A (en) * | 2012-02-06 | 2013-08-19 | Mitsubishi Heavy Ind Ltd | Descaling device |
WO2015018969A1 (en) * | 2013-08-05 | 2015-02-12 | Geonex Oy | Method for steering a direction of a drilling device drilling a hole into the ground |
EP2260172A4 (en) * | 2008-03-13 | 2016-05-04 | Bbj Tools Inc | Wellbore drilling accelerator and tubular connection |
US9624725B2 (en) | 2008-03-13 | 2017-04-18 | Nov Worldwide C.V. | Wellbore percussion adapter and tubular connection |
EP3242990A4 (en) * | 2015-01-08 | 2018-11-21 | Strada Design Limited | Multi fluid drilling system |
CN114482856A (en) * | 2021-12-22 | 2022-05-13 | 中煤科工集团西安研究院有限公司 | Drilling tool combination and method for near-horizontal directional drilling and stuck drilling treatment of complex fractured stratum |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4667751A (en) * | 1985-10-11 | 1987-05-26 | Smith International, Inc. | System and method for controlled directional drilling |
US4697651A (en) * | 1986-12-22 | 1987-10-06 | Mobil Oil Corporation | Method of drilling deviated wellbores |
US5305837A (en) * | 1992-07-17 | 1994-04-26 | Smith International, Inc. | Air percussion drilling assembly for directional drilling applications |
US5738178A (en) * | 1995-11-17 | 1998-04-14 | Baker Hughes Incorporated | Method and apparatus for navigational drilling with a downhole motor employing independent drill string and bottomhole assembly rotary orientation and rotation |
-
2000
- 2000-03-14 AU AU31347/00A patent/AU3134700A/en not_active Abandoned
- 2000-03-14 CA CA002365874A patent/CA2365874A1/en not_active Abandoned
- 2000-03-14 WO PCT/AU2000/000183 patent/WO2000055468A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4667751A (en) * | 1985-10-11 | 1987-05-26 | Smith International, Inc. | System and method for controlled directional drilling |
US4697651A (en) * | 1986-12-22 | 1987-10-06 | Mobil Oil Corporation | Method of drilling deviated wellbores |
US5305837A (en) * | 1992-07-17 | 1994-04-26 | Smith International, Inc. | Air percussion drilling assembly for directional drilling applications |
US5738178A (en) * | 1995-11-17 | 1998-04-14 | Baker Hughes Incorporated | Method and apparatus for navigational drilling with a downhole motor employing independent drill string and bottomhole assembly rotary orientation and rotation |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003064816A1 (en) * | 2002-01-29 | 2003-08-07 | Ingenjörsfirman Geotech AB | Probing device with microwave transmission |
US6719068B2 (en) | 2002-01-29 | 2004-04-13 | Ingenjorsfirman Geotech Ab | Probing device with microwave transmission |
EP1331359A1 (en) * | 2002-01-29 | 2003-07-30 | Ingenjörsfirman Geotech Ab | Probing device with microwave transmission |
WO2005113928A2 (en) | 2004-05-21 | 2005-12-01 | Vermeer Manufacturing Company | System for directional boring including a drilling head with overrunning clutch and method of boring |
WO2005113928A3 (en) * | 2004-05-21 | 2006-05-11 | Vermeer Mfg Co | System for directional boring including a drilling head with overrunning clutch and method of boring |
US7641000B2 (en) | 2004-05-21 | 2010-01-05 | Vermeer Manufacturing Company | System for directional boring including a drilling head with overrunning clutch and method of boring |
AU2005245967B2 (en) * | 2004-05-21 | 2010-12-23 | Vermeer Manufacturing Company | System for directional boring including a drilling head with overrunning clutch and method of boring |
GB2454997A (en) * | 2006-07-11 | 2009-05-27 | Russell Oil Exploration Ltd | Directional drilling control assembly utilising an electromagnetic torque device |
GB2440024B (en) * | 2006-07-11 | 2009-09-30 | Russell Oil Exploration Ltd | Directional drilling control |
GB2454997B (en) * | 2006-07-11 | 2010-03-31 | Russell Oil Exploration Ltd | Directional drilling control |
EP2260172A4 (en) * | 2008-03-13 | 2016-05-04 | Bbj Tools Inc | Wellbore drilling accelerator and tubular connection |
US9624725B2 (en) | 2008-03-13 | 2017-04-18 | Nov Worldwide C.V. | Wellbore percussion adapter and tubular connection |
JP2013158809A (en) * | 2012-02-06 | 2013-08-19 | Mitsubishi Heavy Ind Ltd | Descaling device |
CN105531439A (en) * | 2013-08-05 | 2016-04-27 | 吉欧奈克斯公司 | Method for steering a direction of a drilling device drilling a hole into the ground |
JP2016529423A (en) * | 2013-08-05 | 2016-09-23 | ジオネックス オイ | Method of maneuvering the direction of a drilling rig that drills a hole in the ground |
EP3030739A4 (en) * | 2013-08-05 | 2017-03-15 | Geonex Oy | Method for steering a direction of a drilling device drilling a hole into the ground |
WO2015018969A1 (en) * | 2013-08-05 | 2015-02-12 | Geonex Oy | Method for steering a direction of a drilling device drilling a hole into the ground |
US10151147B2 (en) | 2013-08-05 | 2018-12-11 | Geonex Oy | Method for steering a direction of a drilling device drilling a hole into the ground |
EP3242990A4 (en) * | 2015-01-08 | 2018-11-21 | Strada Design Limited | Multi fluid drilling system |
US10544625B2 (en) | 2015-01-08 | 2020-01-28 | Strada Design Limited | Multi fluid drilling system |
CN114482856A (en) * | 2021-12-22 | 2022-05-13 | 中煤科工集团西安研究院有限公司 | Drilling tool combination and method for near-horizontal directional drilling and stuck drilling treatment of complex fractured stratum |
CN114482856B (en) * | 2021-12-22 | 2023-02-28 | 中煤科工集团西安研究院有限公司 | Drilling tool combination and method for near-horizontal directional drilling and stuck drilling treatment of complex fractured stratum |
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CA2365874A1 (en) | 2000-09-21 |
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