US20120234604A1 - Timed Steering Nozzle on a Downhole Drill Bit - Google Patents
Timed Steering Nozzle on a Downhole Drill Bit Download PDFInfo
- Publication number
- US20120234604A1 US20120234604A1 US13/048,595 US201113048595A US2012234604A1 US 20120234604 A1 US20120234604 A1 US 20120234604A1 US 201113048595 A US201113048595 A US 201113048595A US 2012234604 A1 US2012234604 A1 US 2012234604A1
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- United States
- Prior art keywords
- valve
- fluid
- drill string
- expandable element
- bore
- 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.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 claims abstract description 95
- 238000004891 communication Methods 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims description 40
- 230000015572 biosynthetic process Effects 0.000 claims description 17
- 238000005755 formation reaction Methods 0.000 description 16
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/064—Deflecting the direction of boreholes specially adapted drill bits therefor
-
- 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
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
Definitions
- the present invention relates to the field of steering assemblies used for downhole directional drilling.
- the prior art discloses directional drilling drill bit assemblies.
- U.S. Pat. No. 5,553,678 to Barr et al. which is herein incorporated by reference for all that it contains, discloses a modulated bias unit is provided for controlling the direction of drilling of a rotary drill bit when drilling boreholes in subsurface formations.
- the unit comprises a plurality of hydraulic actuators spaced apart around the periphery of the unit and having movable thrust members hydraulically displaceable outwardly for engagement with the formation of the borehole being drilled.
- Each actuator has an inlet passage for connection to a source of drilling fluid under pressure and an outlet passage for communication with the annulus.
- a selector control valve connects the inlet passages in succession to the source of fluid under pressure, as the unit rotates, and a choke is provided to create a pressure drop between the source of fluid under pressure and the selector valve.
- a further choke is provided in the outlet passage from each actuator unit.
- U.S. Pat. No. 4,416,339 to Baker et al. which is herein incorporated by reference for all that it contains, discloses a mechanism and method for positive drill bit guidance during well drilling operations.
- the guidance device includes a control arm or paddle which, due to hydraulic pressure, pivots to steer the drill bit towards its target area. As the paddle applies pressure to the wall of the well, the drill bit is then turned from the contacted area of the well wall in the desired direction.
- U.S. Pat. No. 5,582,259 to Barr et al. which is herein incorporated by reference for all that it contains, discloses a modulated bias unit, for controlling the direction of drilling of a rotary drill bit when drilling boreholes in subsurface formations, comprises a number of hydraulic actuators spaced apart around the periphery of the unit.
- Each actuator comprises a movable thrust member which is hydraulically displaceable outwardly and a formation-engaging pad which overlies the thrust member and is mounted on the body structure for pivotal movement about a pivot axis located to one side of the thrust member.
- a selector control valve modulates the fluid pressure supplied to each actuator in synchronism with rotation of the drill bit so that, as the drill bit rotates, each pad is displaced outwardly at the same selected rotational position so as to bias the drill bit laterally and thus control the direction of drilling.
- the pivot axis of the formation-engaging member is inclined to the longitudinal axis of rotation of the bias unit so as to compensate for tilting of the bias unit in the borehole during operation.
- a downhole rotary steerable system comprises a fluid cavity defined by a bore formed within a drill string component.
- a valve may be located within the wall of the bore, which hydraulically connects the bore with the fluid cavity.
- a steering nozzle may be disposed on the drill string component and in communication with the fluid cavity. The valve is configured to control flow from the bore to the fluid cavity and an azimuthal sensing mechanism may be configured to determine the azimuth of the steering nozzle. Instrumentation may be configured to control the valve based off of input from the azimuthal sensing mechanism.
- the azimuthal sensing mechanism may comprise a plurality of accelerometers configured to transmit a signal to the instrumentation that actuates the valve through the use of a motor.
- the azimuthal sensing mechanism may also comprise at least one magnetometer which measures azimuth position, wherein the azimuthal sensing mechanism is configured to calibrate the valve using the input from the magnetometer.
- the steerable system may further comprise at least one expandable element supported by the drill string component and in communication with at least one fluid cavity. The expandable element may be disposed opposite the steering nozzle on the drill string element.
- the diameter of the steering nozzle may be smaller than the diameter of the valve such that a pressure differential is created that forces the expandable element to extend and results in ejecting the fluid through the steering nozzle at the formation with increased force.
- the expandable element may be configured to shift the center axis of the drill string away from the center axis of the borehole.
- Each expandable element and steering nozzle may be in fluid communication with a steering nozzle and expandable element.
- the instrumentation may be configured to actuate each valve separately.
- the valve may be configured to be actuated by a motor powered by a turbine generator.
- the turbine generator may also be configured to power the azimuthal sensing mechanism.
- the valve, azimuthal sensing mechanism, and instrumentation may be disposed within a housing.
- the housing may be inserted into the bore of the drill string component and the fluid cavity may comprise an annular shape formed between the housing and the drill string component.
- FIG. 1 is a perspective view of an embodiment of a drill string suspended from a drill rig.
- FIG. 2 is a perspective view of an embodiment of a steerable system.
- FIG. 3 is a perspective view of an embodiment of a steerable system.
- FIG. 4 a is a perspective view of an embodiment of a steerable system.
- FIG. 4 b is a cross-sectional view of an embodiment of a steerable system.
- FIG. 5 a is a cross-sectional view of an embodiment of a steerable system.
- FIG. 5 b is a cross-sectional view of an embodiment of a steerable system.
- FIG. 6 is a cross-sectional view of an embodiment of a steerable system.
- FIG. 7 is a perspective view of another embodiment of a steerable system.
- FIG. 8 is a cross-sectional view of another embodiment of a steerable system.
- FIG. 9 is a perspective view of another embodiment of a steerable system.
- FIG. 10 is a cross-sectional view of another embodiment of a steerable system.
- FIG. 11 a is a cross-sectional view of another embodiment of a steerable system.
- FIG. 11 b is a cross-sectional view of another embodiment of a steerable system.
- FIG. 12 a is a cross-sectional view of another embodiment of a steerable system.
- FIG. 12 b is a cross-sectional view of another embodiment of a steerable system.
- FIG. 13 a is a cross-sectional view of an embodiment of a retraction mechanism.
- FIG. 13 b is a cross-sectional view of another embodiment of a retraction mechanism.
- FIG. 1 is a perspective view of an embodiment of a drilling operation comprising a downhole tool string 100 suspended by a derrick 101 in a wellbore 102 .
- a steerable system 103 may be located at the bottom of the wellbore 102 and may comprise a drill bit 104 . As the drill bit 104 rotates downhole, the downhole tool string 100 advances farther in to the earth.
- the downhole tool string 100 may penetrate soft or hard subterranean formations 105 .
- the steerable system 103 may be adapted to steer the drill string 100 in a desired trajectory.
- the downhole tool string 100 may comprise electronic equipment capable of sending signals through a data communication system to a computer or data logging system 106 located at the surface.
- FIG. 2 discloses a drill bit 104 with a plurality of fixed blades 201 .
- the fixed blades 201 may comprise a plurality of cutters 203 such that as the drill string rotates the cutters penetrate into the earthen formation.
- An expandable element 205 may be disposed adjacent to the drill bit 104 .
- the expandable element 205 may extend away from the axis of the drill string into an earthen formation shifting the axis of the drill string away from the axis of the borehole.
- FIG. 3 discloses a steering nozzle 301 disposed adjacent to the working face of the drill bit 104 opposite the expandable element 205 .
- the steering nozzle 301 may be configured to direct fluid away from the drill bit 104 and towards an earthen formation.
- the drill bit 104 may comprise a plurality of fixed blades 201 evenly spaced on the working face.
- the blades 201 may comprise a plurality of cutters 203 disposed on the blade 201 .
- At least one drilling nozzle 303 may be disposed between each fixed blade 201 and configured to direct fluid toward the plurality of cutters 203 removing excess cutting debris from the working face of the drill bit 104 .
- FIGS. 4 a and 4 b are perspective and cross-sectional views of another embodiment of a steerable system 103 .
- the system 103 may comprise an expandable element 205 disposed on a drill string 100 attached to a drill bit 104 .
- the drill string 100 may comprise a generally outer annular surface, and the steering nozzle 301 and the expandable element 205 may both be supported by the generally outer annular surface, but positioned opposite each other.
- the steering nozzle may be disposed on a gauge of a drill bit.
- a housing 401 that contains some of the mechanism in the steering system may be inserted into the bore of the drill string 100 .
- O-rings 403 may provide a fluid seal between the housing 401 and the inner surface of the drill string's bore.
- the housing 401 may comprise a cylindrical geometry (or another geometry complimentary to the inner surface of the bore).
- the thickness of the housing wall may comprise a motor 405 to operate a valve 407 , the valve 407 , an orientation sensing mechanism instrumentation 409 , and part of an expandable element 205 .
- the orientation sensing mechanism may comprise instrumentation that determines the azimuth of the drill string component.
- the orientation/azimuthal sensing mechanism may comprise an accelerometer 411 and a magnetometer 413 .
- the expandable element 205 may extend through an opening in a side of the drill string 100 .
- the opening in the drill string may correspond with an opening in the housing.
- the fluid cavity may be pressurized and fluid pressure may exert a force on the surface 449 of the back end 450 to extend the expandable element 205 .
- Seals 451 disposed between the opening wall and the expandable element may prevent leaks. In some embodiments, a small leak is acceptable to keep debris from clogging the interference between the expandable element and the opening.
- a stopping mechanism may be incorporated into the present invention to retain the expandable element within the opening while allowing the expandable element to translate within the opening.
- the motor 405 may be mechanically connected to the valve 407 .
- the instrumentation 409 may be in electrical communication with the motor 405 , and thus, control the valve.
- the orientation sensing mechanism may be an azimuthal sensing mechanism configured to detect the orientation of the drill bit 104 downhole and transmit that data to the instrumentation 409 through the use of at least one accelerometer and magnetometer 411 , 413 .
- a processing element of the instrumentation 409 may compute when to activate the motor 405 based on this downhole data or from a separate input received from the surface.
- Accelerometers may be used to track the azimuth of the nozzle and expandable element.
- a magnetometer may be used to compensate for rotational drift defined as a gradually increasing inconsistency between the accelerometer readings and the actual location of the nozzles and expandable element.
- the instrumentation 409 may be configured to compensate for timing delays between the acquisition of data and actuation of the valve as well as the delay between the actuation of the valve and the actuation of the expandable element, thus, facilitating a more precise change in direction while drilling.
- FIGS. 5 a and 5 b are cross-sectional views of an embodiment of a steerable system 103 .
- FIG. 5 a discloses the steerable system 103 with the valve 407 closed. The closed valve 407 results in all drilling fluid being directed to the drilling nozzles 303 in the working face of the drill bit 104 .
- FIG. 5 b discloses the valve 407 open and directing a portion of the drilling fluid into the fluid cavity 501 , and thus, to the steering nozzle 301 and expandable element 205 .
- the valve 407 may comprise a plurality of ports 505 configured to direct fluid from the bore 503 of the drill string to the compressible fluid cavity 501 .
- the ports 505 may be aligned with the bore 503 through the use of a motor 405 . As the motor 405 rotates the valve 407 , the ports 505 may open and close to the bore 503 . When open, the valve directs a portion of the drilling fluid from the bore 503 and into the compressible fluid cavity 501 .
- the valve 407 may be a rotary valve, ball valve, butterfly valve, or any valve that can be used to regulate fluid.
- the fluid may enter the compressible fluid cavity 501 and be directed to a steering nozzle 301 and an expandable element 205 .
- the path to the expandable element 205 may comprise a larger cross sectional area than the steering nozzle 301 , thus, directing more fluid to the expandable element 205 than to the steering nozzle 301 .
- the back end of the expandable element may comprise a greater area than the opening in the steering nozzle.
- the expandable element 205 may come into contact with the earthen formation directing the drill string in the opposite direction of the earthen formation while forcing more fluid through the steering nozzle 301 .
- the steering nozzle 301 may comprise a smaller diameter than the ports 505 creating a greater pressure differential in the compressible fluid cavity 501 from the restriction of fluid passing through the steering nozzle 301 .
- the greater pressure differential may result in the fluid from the steering nozzle 301 being directed at a greater velocity than the fluid from the drilling nozzles 303 .
- FIG. 6 is a cross-sectional view of an embodiment of a steerable system 103 .
- the cross-section discloses the expandable element 205 in fluid communication with the valve 407 through the compressible fluid cavity 501 .
- the steering nozzle may be disposed on the opposite side of the drill string from the expandable element.
- the fluid is in fluid communication with both the steering nozzle and the back end of the expandable element at the same time.
- the compressible fluid cavity from the valve to the back end of the expandable element may form a circular geometry.
- the cavity is formed radially to the bore and provides multiple routes to the expandable element.
- the cavity is formed between an outer surface of the housing (shown in FIG. 4 b ) and the inner surface of drill string.
- the bore may be formed by the housing.
- the expandable element 205 may comprise at least one O-ring 601 forming a fluid seal between the expandable element 205 and any fluids outside the drill string
- FIG. 7 is a perspective view of a steerable system 103 disposed within a borehole formed in an earthen formation 105 with a first axis of rotation 701 .
- the expandable element 205 may extend toward the earthen formation 105 while fluid is being directed at the earthen formation 105 through the steering nozzle 301 on the opposite side of the expandable element 205 .
- the axis of rotation may shift to a second axis 703 . Fluid may continue to exit through the drilling nozzles and mix with the fluid from the steering nozzle 301 .
- the fluid from the steering nozzle 301 may exit at a greater velocity than the fluid from the drilling, face nozzles, thus, directing the force of drilling fluid into a portion of the formation's wall forming an eroded area 705 , and the expandable element is configured to urge the drill into the eroded area 705 .
- FIG. 8 is a cross-sectional view of another embodiment of a steerable system 103 .
- the system may comprise an expandable element 205 comprising a ring 801 disposed around the outer diameter of the drill string 100 .
- the ring 801 may comprise a single, continuous body and be in mechanical connection with a billows, an inflatable bladder, a piston, a ball, or combinations thereof.
- the ring 801 is in mechanical communication with a piston 803 .
- the piston 803 may be disposed in the fluid cavity 501 such that the fluid in the cavity may actuate the piston 803 , thus, extending the ring 801 away from the drill string.
- FIG. 9 is a perspective view of another embodiment of a steerable system 103 .
- the system may comprise a plurality of drilling face nozzles 901 disposed on the working face of the drill bit and a plurality of steering nozzles 903 disposed on the side of the drill bit 104 .
- a plurality of expandable elements 905 may be disposed evenly around the circumference of the drilling string adjacent to the drill bit 104 .
- Each steering nozzle 903 may be configured to direct drilling fluid independently of each other steering nozzle 903 .
- Each steering nozzle 903 may be in fluid communication with a separate compressible fluid cavity.
- Each expandable element 905 may be disposed directly across from a steering nozzle 903 and be in fluid communication with said nozzle through a compressible fluid cavity.
- Each pair of steering nozzles and expandable element may function together at specific moments to change the trajectory or steer the drill string.
- a control board may be configured to synchronize the steering nozzles 901 and expandable elements 903 to activate while in the same direction while drilling thus increasing the speed at which a direction can be changed while drilling.
- the compressible fluid cavities for each pair of expandable elements and steering nozzles may be independent of the other cavities. In some embodiments, switches may provide some intentional fluid communication between the cavities.
- FIG. 10 is a cross-sectional view of another embodiment of a steerable system 103 .
- the system discloses a generator 1001 disposed within the bore 503 of the drill string 100 .
- the generator 1001 may be configured to provide power to the motor 405 and the control board 409 .
- FIGS. 11 a and 11 b are cross-sectional views of another embodiment of a steerable system 103 .
- the system 103 may comprise a reciprocating valve 1101 configured to direct all fluid to the at least one steering nozzle 301 disposed on the side of the drill bit 104 or to direct all drilling fluid to the at least one drilling nozzle 303 disposed on the working face of the drill bit 104 .
- FIG. 11 a discloses the valve 1101 open to the bore of the drill string and directing fluid to the expandable element and the steering nozzle.
- the geometry of the valve also simultaneously blocks fluid from the face, drilling nozzles.
- the fluid is also temporarily blocked to the face, drilling nozzles.
- Such an arrangement many provide at least two advantages. First, more hydraulic power may be provided to the steering nozzle and expandable element. Second, the fluid ejected from the face, drilling nozzles may have a lower propensity to interfere with the fluid ejected from the steering nozzle. Third, the temporary blockage may induce a vibration in the fluid ejected from the face, drilling nozzles, which may provide an additional destructive force into the formation.
- FIG. 11 b discloses the valve 1101 closed to the bore and thus, directing the fluid to the drilling nozzles 303 .
- FIGS. 12 a and 12 b disclose a reciprocating valve 1201 configured to alternate drilling fluid between a fluid cavity 501 , and thus to the steering nozzle and expandable element, and to a single drilling nozzle 1203 disposed nearby the steering nozzle 301 .
- FIG. 12 a discloses the valve directing fluid to the fluid cavity 501 while blocking the fluid flow to the drilling nozzle.
- FIG. 12 b discloses the valve 1201 directing fluid to the drilling nozzle 1203 while blocking the fluid to the steering nozzle 301 .
- FIGS. 13 a and 13 b disclose a retraction mechanism 1301 disposed adjacent an expandable element 1303 .
- the retraction mechanism 1301 may comprise a compression spring, a tension spring, a spring mechanism, or a hydraulic mechanism.
- FIG. 13 a discloses a spring mechanism 1305 retracting the expandable element as the valve 407 closes and fluid pressure in the fluid cavity is reduced.
- FIG. 13 b discloses a retraction mechanism 1301 comprising a hydraulic mechanism 1307 .
- fluid may be directed into a hydraulic chamber 1307 that, when pressurized, returns the expandable element to its retracted position.
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Abstract
In one aspect of the present invention, a downhole rotary steerable system comprises a fluid path defined by a bore formed within a drill string component. A valve located within a wall of the bore which hydraulically connects the bore with a fluid cavity. A steering nozzle disposed on the drill string component and in communication with the fluid cavity. The valve is configured to control flow from the bore to the fluid cavity with an azimuthal sensing mechanism configured to determine the azimuth of the steering nozzle and instrumentation configured to control the valve based off of input from the azimuthal sensing mechanism.
Description
- The present invention relates to the field of steering assemblies used for downhole directional drilling. The prior art discloses directional drilling drill bit assemblies.
- U.S. Pat. No. 5,553,678 to Barr et al., which is herein incorporated by reference for all that it contains, discloses a modulated bias unit is provided for controlling the direction of drilling of a rotary drill bit when drilling boreholes in subsurface formations. The unit comprises a plurality of hydraulic actuators spaced apart around the periphery of the unit and having movable thrust members hydraulically displaceable outwardly for engagement with the formation of the borehole being drilled. Each actuator has an inlet passage for connection to a source of drilling fluid under pressure and an outlet passage for communication with the annulus. A selector control valve connects the inlet passages in succession to the source of fluid under pressure, as the unit rotates, and a choke is provided to create a pressure drop between the source of fluid under pressure and the selector valve. A further choke is provided in the outlet passage from each actuator unit. The actuators and control valve arrangements may take a number of different forms.
- U.S. Pat. No. 4,416,339 to Baker et al., which is herein incorporated by reference for all that it contains, discloses a mechanism and method for positive drill bit guidance during well drilling operations. The guidance device includes a control arm or paddle which, due to hydraulic pressure, pivots to steer the drill bit towards its target area. As the paddle applies pressure to the wall of the well, the drill bit is then turned from the contacted area of the well wall in the desired direction.
- U.S. Pat. No. 5,582,259 to Barr et al., which is herein incorporated by reference for all that it contains, discloses a modulated bias unit, for controlling the direction of drilling of a rotary drill bit when drilling boreholes in subsurface formations, comprises a number of hydraulic actuators spaced apart around the periphery of the unit. Each actuator comprises a movable thrust member which is hydraulically displaceable outwardly and a formation-engaging pad which overlies the thrust member and is mounted on the body structure for pivotal movement about a pivot axis located to one side of the thrust member. A selector control valve modulates the fluid pressure supplied to each actuator in synchronism with rotation of the drill bit so that, as the drill bit rotates, each pad is displaced outwardly at the same selected rotational position so as to bias the drill bit laterally and thus control the direction of drilling. The pivot axis of the formation-engaging member is inclined to the longitudinal axis of rotation of the bias unit so as to compensate for tilting of the bias unit in the borehole during operation.
- In one aspect of the present invention, a downhole rotary steerable system comprises a fluid cavity defined by a bore formed within a drill string component. A valve may be located within the wall of the bore, which hydraulically connects the bore with the fluid cavity. A steering nozzle may be disposed on the drill string component and in communication with the fluid cavity. The valve is configured to control flow from the bore to the fluid cavity and an azimuthal sensing mechanism may be configured to determine the azimuth of the steering nozzle. Instrumentation may be configured to control the valve based off of input from the azimuthal sensing mechanism.
- The azimuthal sensing mechanism may comprise a plurality of accelerometers configured to transmit a signal to the instrumentation that actuates the valve through the use of a motor. The azimuthal sensing mechanism may also comprise at least one magnetometer which measures azimuth position, wherein the azimuthal sensing mechanism is configured to calibrate the valve using the input from the magnetometer. The steerable system may further comprise at least one expandable element supported by the drill string component and in communication with at least one fluid cavity. The expandable element may be disposed opposite the steering nozzle on the drill string element.
- The diameter of the steering nozzle may be smaller than the diameter of the valve such that a pressure differential is created that forces the expandable element to extend and results in ejecting the fluid through the steering nozzle at the formation with increased force. The expandable element may be configured to shift the center axis of the drill string away from the center axis of the borehole. Each expandable element and steering nozzle may be in fluid communication with a steering nozzle and expandable element.
- The instrumentation may be configured to actuate each valve separately. The valve may be configured to be actuated by a motor powered by a turbine generator. The turbine generator may also be configured to power the azimuthal sensing mechanism. The valve, azimuthal sensing mechanism, and instrumentation may be disposed within a housing. The housing may be inserted into the bore of the drill string component and the fluid cavity may comprise an annular shape formed between the housing and the drill string component.
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FIG. 1 is a perspective view of an embodiment of a drill string suspended from a drill rig. -
FIG. 2 is a perspective view of an embodiment of a steerable system. -
FIG. 3 is a perspective view of an embodiment of a steerable system. -
FIG. 4 a is a perspective view of an embodiment of a steerable system. -
FIG. 4 b is a cross-sectional view of an embodiment of a steerable system. -
FIG. 5 a is a cross-sectional view of an embodiment of a steerable system. -
FIG. 5 b is a cross-sectional view of an embodiment of a steerable system. -
FIG. 6 is a cross-sectional view of an embodiment of a steerable system. -
FIG. 7 is a perspective view of another embodiment of a steerable system. -
FIG. 8 is a cross-sectional view of another embodiment of a steerable system. -
FIG. 9 is a perspective view of another embodiment of a steerable system. -
FIG. 10 is a cross-sectional view of another embodiment of a steerable system. -
FIG. 11 a is a cross-sectional view of another embodiment of a steerable system. -
FIG. 11 b is a cross-sectional view of another embodiment of a steerable system. -
FIG. 12 a is a cross-sectional view of another embodiment of a steerable system. -
FIG. 12 b is a cross-sectional view of another embodiment of a steerable system. -
FIG. 13 a is a cross-sectional view of an embodiment of a retraction mechanism. -
FIG. 13 b is a cross-sectional view of another embodiment of a retraction mechanism. - Referring now to the figures,
FIG. 1 is a perspective view of an embodiment of a drilling operation comprising adownhole tool string 100 suspended by aderrick 101 in awellbore 102. Asteerable system 103 may be located at the bottom of thewellbore 102 and may comprise adrill bit 104. As thedrill bit 104 rotates downhole, thedownhole tool string 100 advances farther in to the earth. Thedownhole tool string 100 may penetrate soft or hardsubterranean formations 105. Thesteerable system 103 may be adapted to steer thedrill string 100 in a desired trajectory. Thedownhole tool string 100 may comprise electronic equipment capable of sending signals through a data communication system to a computer ordata logging system 106 located at the surface. -
FIG. 2 discloses adrill bit 104 with a plurality of fixedblades 201. Thefixed blades 201 may comprise a plurality ofcutters 203 such that as the drill string rotates the cutters penetrate into the earthen formation. Anexpandable element 205 may be disposed adjacent to thedrill bit 104. Theexpandable element 205 may extend away from the axis of the drill string into an earthen formation shifting the axis of the drill string away from the axis of the borehole. -
FIG. 3 discloses asteering nozzle 301 disposed adjacent to the working face of thedrill bit 104 opposite theexpandable element 205. The steeringnozzle 301 may be configured to direct fluid away from thedrill bit 104 and towards an earthen formation. Thedrill bit 104 may comprise a plurality of fixedblades 201 evenly spaced on the working face. Theblades 201 may comprise a plurality ofcutters 203 disposed on theblade 201. At least onedrilling nozzle 303 may be disposed between eachfixed blade 201 and configured to direct fluid toward the plurality ofcutters 203 removing excess cutting debris from the working face of thedrill bit 104. -
FIGS. 4 a and 4 b are perspective and cross-sectional views of another embodiment of asteerable system 103. Thesystem 103 may comprise anexpandable element 205 disposed on adrill string 100 attached to adrill bit 104. Thedrill string 100 may comprise a generally outer annular surface, and thesteering nozzle 301 and theexpandable element 205 may both be supported by the generally outer annular surface, but positioned opposite each other. In some embodiments the steering nozzle may be disposed on a gauge of a drill bit. - A
housing 401 that contains some of the mechanism in the steering system may be inserted into the bore of thedrill string 100. O-rings 403 may provide a fluid seal between thehousing 401 and the inner surface of the drill string's bore. Thehousing 401 may comprise a cylindrical geometry (or another geometry complimentary to the inner surface of the bore). The thickness of the housing wall may comprise amotor 405 to operate avalve 407, thevalve 407, an orientationsensing mechanism instrumentation 409, and part of anexpandable element 205. The orientation sensing mechanism may comprise instrumentation that determines the azimuth of the drill string component. The orientation/azimuthal sensing mechanism may comprise anaccelerometer 411 and amagnetometer 413. - The
expandable element 205 may extend through an opening in a side of thedrill string 100. The opening in the drill string may correspond with an opening in the housing. As fluid is directed towards asurface 449 on aback end 450 of theexpandable element 205, the fluid cavity may be pressurized and fluid pressure may exert a force on thesurface 449 of theback end 450 to extend theexpandable element 205.Seals 451 disposed between the opening wall and the expandable element may prevent leaks. In some embodiments, a small leak is acceptable to keep debris from clogging the interference between the expandable element and the opening. Also, a stopping mechanism may be incorporated into the present invention to retain the expandable element within the opening while allowing the expandable element to translate within the opening. - The
motor 405 may be mechanically connected to thevalve 407. Theinstrumentation 409 may be in electrical communication with themotor 405, and thus, control the valve. In the present embodiment, the orientation sensing mechanism may be an azimuthal sensing mechanism configured to detect the orientation of thedrill bit 104 downhole and transmit that data to theinstrumentation 409 through the use of at least one accelerometer andmagnetometer instrumentation 409 may compute when to activate themotor 405 based on this downhole data or from a separate input received from the surface. - Accelerometers may be used to track the azimuth of the nozzle and expandable element. In some embodiments, a magnetometer may be used to compensate for rotational drift defined as a gradually increasing inconsistency between the accelerometer readings and the actual location of the nozzles and expandable element. The
instrumentation 409 may be configured to compensate for timing delays between the acquisition of data and actuation of the valve as well as the delay between the actuation of the valve and the actuation of the expandable element, thus, facilitating a more precise change in direction while drilling. -
FIGS. 5 a and 5 b are cross-sectional views of an embodiment of asteerable system 103.FIG. 5 a discloses thesteerable system 103 with thevalve 407 closed. Theclosed valve 407 results in all drilling fluid being directed to thedrilling nozzles 303 in the working face of thedrill bit 104.FIG. 5 b discloses thevalve 407 open and directing a portion of the drilling fluid into thefluid cavity 501, and thus, to thesteering nozzle 301 andexpandable element 205. - The
valve 407 may comprise a plurality ofports 505 configured to direct fluid from thebore 503 of the drill string to thecompressible fluid cavity 501. Theports 505 may be aligned with thebore 503 through the use of amotor 405. As themotor 405 rotates thevalve 407, theports 505 may open and close to thebore 503. When open, the valve directs a portion of the drilling fluid from thebore 503 and into thecompressible fluid cavity 501. Thevalve 407 may be a rotary valve, ball valve, butterfly valve, or any valve that can be used to regulate fluid. - The fluid may enter the
compressible fluid cavity 501 and be directed to asteering nozzle 301 and anexpandable element 205. The path to theexpandable element 205 may comprise a larger cross sectional area than the steeringnozzle 301, thus, directing more fluid to theexpandable element 205 than to thesteering nozzle 301. In some embodiments, the back end of the expandable element may comprise a greater area than the opening in the steering nozzle. Theexpandable element 205 may come into contact with the earthen formation directing the drill string in the opposite direction of the earthen formation while forcing more fluid through thesteering nozzle 301. The steeringnozzle 301 may comprise a smaller diameter than theports 505 creating a greater pressure differential in thecompressible fluid cavity 501 from the restriction of fluid passing through thesteering nozzle 301. The greater pressure differential may result in the fluid from the steeringnozzle 301 being directed at a greater velocity than the fluid from thedrilling nozzles 303. -
FIG. 6 is a cross-sectional view of an embodiment of asteerable system 103. The cross-section discloses theexpandable element 205 in fluid communication with thevalve 407 through thecompressible fluid cavity 501. The steering nozzle may be disposed on the opposite side of the drill string from the expandable element. Preferably, when the valve is open to the drilling fluid in the drill string's bore, the fluid is in fluid communication with both the steering nozzle and the back end of the expandable element at the same time. The compressible fluid cavity from the valve to the back end of the expandable element may form a circular geometry. In some embodiments, the cavity is formed radially to the bore and provides multiple routes to the expandable element. In some embodiments, the cavity is formed between an outer surface of the housing (shown inFIG. 4 b) and the inner surface of drill string. In part the bore may be formed by the housing. Theexpandable element 205 may comprise at least one O-ring 601 forming a fluid seal between theexpandable element 205 and any fluids outside the drill string -
FIG. 7 is a perspective view of asteerable system 103 disposed within a borehole formed in anearthen formation 105 with a first axis ofrotation 701. As fluid flows through the fluid cavity, theexpandable element 205 may extend toward theearthen formation 105 while fluid is being directed at theearthen formation 105 through thesteering nozzle 301 on the opposite side of theexpandable element 205. As theexpandable element 205 extends and makes contact with theearthen formation 105 the axis of rotation may shift to asecond axis 703. Fluid may continue to exit through the drilling nozzles and mix with the fluid from the steeringnozzle 301. The fluid from the steeringnozzle 301 may exit at a greater velocity than the fluid from the drilling, face nozzles, thus, directing the force of drilling fluid into a portion of the formation's wall forming an erodedarea 705, and the expandable element is configured to urge the drill into the erodedarea 705. -
FIG. 8 is a cross-sectional view of another embodiment of asteerable system 103. The system may comprise anexpandable element 205 comprising aring 801 disposed around the outer diameter of thedrill string 100. Thering 801 may comprise a single, continuous body and be in mechanical connection with a billows, an inflatable bladder, a piston, a ball, or combinations thereof. In the present embodiment, thering 801 is in mechanical communication with apiston 803. Thepiston 803 may be disposed in thefluid cavity 501 such that the fluid in the cavity may actuate thepiston 803, thus, extending thering 801 away from the drill string. -
FIG. 9 is a perspective view of another embodiment of asteerable system 103. The system may comprise a plurality ofdrilling face nozzles 901 disposed on the working face of the drill bit and a plurality of steeringnozzles 903 disposed on the side of thedrill bit 104. A plurality ofexpandable elements 905 may be disposed evenly around the circumference of the drilling string adjacent to thedrill bit 104. Each steeringnozzle 903 may be configured to direct drilling fluid independently of eachother steering nozzle 903. Each steeringnozzle 903 may be in fluid communication with a separate compressible fluid cavity. Eachexpandable element 905 may be disposed directly across from asteering nozzle 903 and be in fluid communication with said nozzle through a compressible fluid cavity. Each pair of steering nozzles and expandable element may function together at specific moments to change the trajectory or steer the drill string. A control board may be configured to synchronize thesteering nozzles 901 andexpandable elements 903 to activate while in the same direction while drilling thus increasing the speed at which a direction can be changed while drilling. The compressible fluid cavities for each pair of expandable elements and steering nozzles may be independent of the other cavities. In some embodiments, switches may provide some intentional fluid communication between the cavities. -
FIG. 10 is a cross-sectional view of another embodiment of asteerable system 103. The system discloses agenerator 1001 disposed within thebore 503 of thedrill string 100. Thegenerator 1001 may be configured to provide power to themotor 405 and thecontrol board 409. -
FIGS. 11 a and 11 b are cross-sectional views of another embodiment of asteerable system 103. Thesystem 103 may comprise areciprocating valve 1101 configured to direct all fluid to the at least onesteering nozzle 301 disposed on the side of thedrill bit 104 or to direct all drilling fluid to the at least onedrilling nozzle 303 disposed on the working face of thedrill bit 104. -
FIG. 11 a discloses thevalve 1101 open to the bore of the drill string and directing fluid to the expandable element and the steering nozzle. However, the geometry of the valve also simultaneously blocks fluid from the face, drilling nozzles. Thus, while the fluid is directed to the steering nozzles, the fluid is also temporarily blocked to the face, drilling nozzles. Such an arrangement many provide at least two advantages. First, more hydraulic power may be provided to the steering nozzle and expandable element. Second, the fluid ejected from the face, drilling nozzles may have a lower propensity to interfere with the fluid ejected from the steering nozzle. Third, the temporary blockage may induce a vibration in the fluid ejected from the face, drilling nozzles, which may provide an additional destructive force into the formation.FIG. 11 b discloses thevalve 1101 closed to the bore and thus, directing the fluid to thedrilling nozzles 303. -
FIGS. 12 a and 12 b disclose areciprocating valve 1201 configured to alternate drilling fluid between afluid cavity 501, and thus to the steering nozzle and expandable element, and to asingle drilling nozzle 1203 disposed nearby thesteering nozzle 301.FIG. 12 a discloses the valve directing fluid to thefluid cavity 501 while blocking the fluid flow to the drilling nozzle.FIG. 12 b, on the other hand, discloses thevalve 1201 directing fluid to thedrilling nozzle 1203 while blocking the fluid to thesteering nozzle 301. -
FIGS. 13 a and 13 b disclose aretraction mechanism 1301 disposed adjacent anexpandable element 1303. Theretraction mechanism 1301 may comprise a compression spring, a tension spring, a spring mechanism, or a hydraulic mechanism.FIG. 13 a discloses aspring mechanism 1305 retracting the expandable element as thevalve 407 closes and fluid pressure in the fluid cavity is reduced. -
FIG. 13 b discloses aretraction mechanism 1301 comprising ahydraulic mechanism 1307. As thevalve 407 closes, fluid may be directed into ahydraulic chamber 1307 that, when pressurized, returns the expandable element to its retracted position. - Whereas the present invention has been described in particular relation to the drawings attached hereto, it should be understood that other and further modifications apart from those shown or suggested herein, may be made within the scope and spirit of the present invention.
Claims (19)
1. A downhole rotary steerable system, comprising:
a fluid path defined by a bore formed within a drill string component;
a valve located within a wall of the bore and which hydraulically connects the bore with a fluid cavity;
a steering nozzle disposed on the drill string component and in communication with the fluid cavity;
the valve is configured to control flow from the bore to the fluid cavity;
an azimuthal sensing mechanism configured to determine an azimuth of the steering nozzle; and
instrumentation configured to control the valve based off of an input from the azimuthal sensing mechanism.
2. The system of claim 1 , wherein the azimuthal sensing mechanism comprises a plurality of accelerometers configured to transmit a signal to the instrumentation that actuates the valve through use of a motor.
3. The system of claim 2 , wherein the azimuthal sensing mechanism comprises at least one magnetometer that measures the azimuthal position, wherein the azimuthal sensing mechanism is configured to calibrate the valve using the input from the magnetometer.
4. The system of claim 1 , further comprising at least one expandable element supported by the drill string component and in communication with at least one fluid cavity.
5. The system of claim 4 , wherein the at least one expandable element is disposed opposite the steering nozzle on the drill string component.
6. The system of claim 4 , wherein a diameter of the steering nozzle is smaller than a diameter of the valve such that a pressure differential is created that forces the expandable element to extend.
7. The system of claim 6 , wherein the pressure differential results in ejecting a fluid at a formation with increased force.
8. The system of claim 4 , wherein the expandable element is configured to shift a center axis of the drill string away from a center axis of the borehole.
9. The system of claim 4 , wherein each expandable element and steering nozzle is in fluid communication through a separate fluid cavity.
10. The system of claim 1 , further comprising a plurality of valves with each valve in fluid communication with a steering nozzle and expandable element.
11. The system of claim 10 , wherein the instrumentation is configured to actuate each valve separately.
12. The system of claim 1 , wherein the valve is configured to be actuated by a motor powered by a turbine generator.
13. The system of claim 1 , wherein a turbine generator is configured to power the azimuthal sensing mechanism.
14. The system of claim 1 , further comprising at least one drilling nozzle disposed on a working face of a drill bit attached to the drill string component.
15. The system of claim 14 , wherein the drilling nozzle is configured to clean the blades of a drill bit and remove debris from the working face of the drill bit.
16. The system of claim 14 , wherein the valve is configured to regulate fluid between the bore, fluid cavity, and at least one drilling nozzle.
17. The system of claim 1 , wherein the valve, azimuth sensing mechanism, and instrumentation are disposed within a housing.
18. The system of claim 17 , wherein the housing is inserted into the bore of the drill string component.
19. The system of claim 17 , wherein the fluid cavity comprises an annular shape between the housing and the drill string component.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/048,595 US20120234604A1 (en) | 2011-03-15 | 2011-03-15 | Timed Steering Nozzle on a Downhole Drill Bit |
US13/048,707 US8342266B2 (en) | 2011-03-15 | 2011-03-15 | Timed steering nozzle on a downhole drill bit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US13/048,595 US20120234604A1 (en) | 2011-03-15 | 2011-03-15 | Timed Steering Nozzle on a Downhole Drill Bit |
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Application Number | Title | Priority Date | Filing Date |
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US13/048,707 Continuation US8342266B2 (en) | 2011-03-15 | 2011-03-15 | Timed steering nozzle on a downhole drill bit |
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US20120234604A1 true US20120234604A1 (en) | 2012-09-20 |
Family
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Family Applications (2)
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US13/048,595 Abandoned US20120234604A1 (en) | 2011-03-15 | 2011-03-15 | Timed Steering Nozzle on a Downhole Drill Bit |
US13/048,707 Expired - Fee Related US8342266B2 (en) | 2011-03-15 | 2011-03-15 | Timed steering nozzle on a downhole drill bit |
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Application Number | Title | Priority Date | Filing Date |
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US13/048,707 Expired - Fee Related US8342266B2 (en) | 2011-03-15 | 2011-03-15 | Timed steering nozzle on a downhole drill bit |
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US (2) | US20120234604A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018017092A1 (en) | 2016-07-21 | 2018-01-25 | Halliburton Energy Services, Inc. | Valve mechanism for rotary steerable tool and methods of use |
WO2020005297A1 (en) * | 2018-06-29 | 2020-01-02 | Halliburton Energy Services, Inc. | Multi-lateral entry tool with independent control of functions |
US20210404260A1 (en) * | 2017-06-26 | 2021-12-30 | Schlumberger Technology Corporation | Downhole steering system and methods |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10605005B2 (en) * | 2014-12-09 | 2020-03-31 | Schlumberger Technology Corporation | Steerable drill bit system |
CA3240418A1 (en) | 2016-01-21 | 2017-07-27 | National Oilwell DHT, L.P. | Fixed cutter drill bits including nozzles with end and side exits |
WO2017172563A1 (en) | 2016-03-31 | 2017-10-05 | Schlumberger Technology Corporation | Equipment string communication and steering |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4491738A (en) * | 1981-11-24 | 1985-01-01 | Shell Internationale Research Maatschappij, B.V. | Means for generating electricity during drilling of a borehole |
US5553678A (en) * | 1991-08-30 | 1996-09-10 | Camco International Inc. | Modulated bias units for steerable rotary drilling systems |
US5787998A (en) * | 1995-08-03 | 1998-08-04 | Flowdril Corporation | Down hole pressure intensifier and drilling assembly and method |
US5803185A (en) * | 1995-02-25 | 1998-09-08 | Camco Drilling Group Limited Of Hycalog | Steerable rotary drilling systems and method of operating such systems |
US20110036631A1 (en) * | 2008-04-18 | 2011-02-17 | Dreco Energy Services Ltd. | Method and apparatus for controlling downhole rotational rate of a drilling tool |
US7931098B2 (en) * | 2003-09-15 | 2011-04-26 | Baker Hughes Incorporated | Steerable bit system assembly and methods |
Family Cites Families (122)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US616118A (en) | 1898-12-20 | Ernest kuhne | ||
US2544038A (en) | 1951-03-06 | Recording sgaiie | ||
US465103A (en) | 1891-12-15 | Combined drill | ||
US946060A (en) | 1908-10-10 | 1910-01-11 | David W Looker | Post-hole auger. |
US1116154A (en) | 1913-03-26 | 1914-11-03 | William G Stowers | Post-hole digger. |
US1189560A (en) | 1914-10-21 | 1916-07-04 | Georg Gondos | Rotary drill. |
US1183630A (en) | 1915-06-29 | 1916-05-16 | Charles R Bryson | Underreamer. |
US1367733A (en) | 1918-12-27 | 1921-02-08 | Western Electric Co | Telegraph system |
US1460671A (en) | 1920-06-17 | 1923-07-03 | Hebsacker Wilhelm | Excavating machine |
US1360908A (en) | 1920-07-16 | 1920-11-30 | Everson August | Reamer |
US1544757A (en) | 1923-02-05 | 1925-07-07 | Hufford | Oil-well reamer |
US1821474A (en) | 1927-12-05 | 1931-09-01 | Sullivan Machinery Co | Boring tool |
US1879177A (en) | 1930-05-16 | 1932-09-27 | W J Newman Company | Drilling apparatus for large wells |
US2054255A (en) | 1934-11-13 | 1936-09-15 | John H Howard | Well drilling tool |
US2064255A (en) | 1936-06-19 | 1936-12-15 | Hughes Tool Co | Removable core breaker |
US2169223A (en) | 1937-04-10 | 1939-08-15 | Carl C Christian | Drilling apparatus |
US2218130A (en) | 1938-06-14 | 1940-10-15 | Shell Dev | Hydraulic disruption of solids |
US2320136A (en) | 1940-09-30 | 1943-05-25 | Archer W Kammerer | Well drilling bit |
US2466991A (en) | 1945-06-06 | 1949-04-12 | Archer W Kammerer | Rotary drill bit |
US2540464A (en) | 1947-05-31 | 1951-02-06 | Reed Roller Bit Co | Pilot bit |
US2894722A (en) | 1953-03-17 | 1959-07-14 | Ralph Q Buttolph | Method and apparatus for providing a well bore with a deflected extension |
US2776819A (en) | 1953-10-09 | 1957-01-08 | Philip B Brown | Rock drill bit |
US2755071A (en) | 1954-08-25 | 1956-07-17 | Rotary Oil Tool Company | Apparatus for enlarging well bores |
US2901223A (en) | 1955-11-30 | 1959-08-25 | Hughes Tool Co | Earth boring drill |
US2838284A (en) | 1956-04-19 | 1958-06-10 | Christensen Diamond Prod Co | Rotary drill bit |
US2963102A (en) | 1956-08-13 | 1960-12-06 | James E Smith | Hydraulic drill bit |
US2891043A (en) | 1957-05-27 | 1959-06-16 | Hercules Powder Co Ltd | Process for polymerization of ethylene |
US3135341A (en) | 1960-10-04 | 1964-06-02 | Christensen Diamond Prod Co | Diamond drill bits |
US3301339A (en) | 1964-06-19 | 1967-01-31 | Exxon Production Research Co | Drill bit with wear resistant material on blade |
US3294186A (en) | 1964-06-22 | 1966-12-27 | Tartan Ind Inc | Rock bits and methods of making the same |
US3379264A (en) | 1964-11-05 | 1968-04-23 | Dravo Corp | Earth boring machine |
DE1275976B (en) | 1966-11-18 | 1968-08-29 | Georg Schoenfeld | Driving machine for tunnels and routes in mining with drilling tools |
US3429390A (en) | 1967-05-19 | 1969-02-25 | Supercussion Drills Inc | Earth-drilling bits |
US3583504A (en) | 1969-02-24 | 1971-06-08 | Mission Mfg Co | Gauge cutting bit |
US3746108A (en) * | 1971-02-25 | 1973-07-17 | G Hall | Focus nozzle directional bit |
US3821993A (en) | 1971-09-07 | 1974-07-02 | Kennametal Inc | Auger arrangement |
US3764493A (en) | 1972-08-31 | 1973-10-09 | Us Interior | Recovery of nickel and cobalt |
DE2414354A1 (en) | 1974-03-26 | 1975-10-16 | Heller Geb | ROCK DRILLS |
US3955635A (en) | 1975-02-03 | 1976-05-11 | Skidmore Sam C | Percussion drill bit |
US4096917A (en) | 1975-09-29 | 1978-06-27 | Harris Jesse W | Earth drilling knobby bit |
US4081042A (en) | 1976-07-08 | 1978-03-28 | Tri-State Oil Tool Industries, Inc. | Stabilizer and rotary expansible drill bit apparatus |
US4106577A (en) | 1977-06-20 | 1978-08-15 | The Curators Of The University Of Missouri | Hydromechanical drilling device |
US4176723A (en) | 1977-11-11 | 1979-12-04 | DTL, Incorporated | Diamond drill bit |
US4307786A (en) | 1978-07-27 | 1981-12-29 | Evans Robert F | Borehole angle control by gage corner removal effects from hydraulic fluid jet |
CH640304A5 (en) | 1979-06-13 | 1983-12-30 | Inst Gornogo Dela Sibirskogo O | DRILLING TOOL FOR DRILLING HOLES, ESPECIALLY FOR A SELF-DRIVING IMPACT MACHINE. |
JPS56500897A (en) | 1979-06-19 | 1981-07-02 | ||
US4253533A (en) | 1979-11-05 | 1981-03-03 | Smith International, Inc. | Variable wear pad for crossflow drag bit |
US4304312A (en) | 1980-01-11 | 1981-12-08 | Sandvik Aktiebolag | Percussion drill bit having centrally projecting insert |
US4397361A (en) | 1981-06-01 | 1983-08-09 | Dresser Industries, Inc. | Abradable cutter protection |
US4448269A (en) | 1981-10-27 | 1984-05-15 | Hitachi Construction Machinery Co., Ltd. | Cutter head for pit-boring machine |
US4416339A (en) | 1982-01-21 | 1983-11-22 | Baker Royce E | Bit guidance device and method |
US4574895A (en) | 1982-02-22 | 1986-03-11 | Hughes Tool Company - Usa | Solid head bit with tungsten carbide central core |
FR2538442B1 (en) | 1982-12-23 | 1986-02-28 | Charbonnages De France | SIZE FOR ROTARY JET ASSISTED BY JET |
US4531592A (en) | 1983-02-07 | 1985-07-30 | Asadollah Hayatdavoudi | Jet nozzle |
US4499795A (en) | 1983-09-23 | 1985-02-19 | Strata Bit Corporation | Method of drill bit manufacture |
US4566545A (en) | 1983-09-29 | 1986-01-28 | Norton Christensen, Inc. | Coring device with an improved core sleeve and anti-gripping collar with a collective core catcher |
US4538691A (en) | 1984-01-30 | 1985-09-03 | Strata Bit Corporation | Rotary drill bit |
US4640374A (en) | 1984-01-30 | 1987-02-03 | Strata Bit Corporation | Rotary drill bit |
US4889017A (en) | 1984-07-19 | 1989-12-26 | Reed Tool Co., Ltd. | Rotary drill bit for use in drilling holes in subsurface earth formations |
CA1276928C (en) | 1988-01-08 | 1990-11-27 | Piotr Grabinski | Deflection apparatus |
US4852672A (en) | 1988-08-15 | 1989-08-01 | Behrens Robert N | Drill apparatus having a primary drill and a pilot drill |
US4981184A (en) | 1988-11-21 | 1991-01-01 | Smith International, Inc. | Diamond drag bit for soft formations |
DE3912067C1 (en) | 1989-04-13 | 1990-09-06 | Eastman Christensen Co., Salt Lake City, Utah, Us | |
GB8926688D0 (en) | 1989-11-25 | 1990-01-17 | Reed Tool Co | Improvements in or relating to rotary drill bits |
US4962822A (en) | 1989-12-15 | 1990-10-16 | Numa Tool Company | Downhole drill bit and bit coupling |
US5027914A (en) | 1990-06-04 | 1991-07-02 | Wilson Steve B | Pilot casing mill |
US5141063A (en) | 1990-08-08 | 1992-08-25 | Quesenbury Jimmy B | Restriction enhancement drill |
GB2252574B (en) | 1991-02-01 | 1995-01-18 | Reed Tool Co | Rotary drill bits and methods of designing such drill bits |
US5410303A (en) | 1991-05-15 | 1995-04-25 | Baroid Technology, Inc. | System for drilling deivated boreholes |
US5265682A (en) | 1991-06-25 | 1993-11-30 | Camco Drilling Group Limited | Steerable rotary drilling systems |
US5186268A (en) | 1991-10-31 | 1993-02-16 | Camco Drilling Group Ltd. | Rotary drill bits |
US5255749A (en) | 1992-03-16 | 1993-10-26 | Steer-Rite, Ltd. | Steerable burrowing mole |
US5560440A (en) | 1993-02-12 | 1996-10-01 | Baker Hughes Incorporated | Bit for subterranean drilling fabricated from separately-formed major components |
US5361859A (en) | 1993-02-12 | 1994-11-08 | Baker Hughes Incorporated | Expandable gage bit for drilling and method of drilling |
US5417292A (en) | 1993-11-22 | 1995-05-23 | Polakoff; Paul | Large diameter rock drill |
US5605198A (en) | 1993-12-09 | 1997-02-25 | Baker Hughes Incorporated | Stress related placement of engineered superabrasive cutting elements on rotary drag bits |
US5475309A (en) | 1994-01-21 | 1995-12-12 | Atlantic Richfield Company | Sensor in bit for measuring formation properties while drilling including a drilling fluid ejection nozzle for ejecting a uniform layer of fluid over the sensor |
CA2115004A1 (en) | 1994-02-04 | 1995-08-05 | Vern Arthur Hult | Pilot bit for use in auger bit assembly |
US5423389A (en) | 1994-03-25 | 1995-06-13 | Amoco Corporation | Curved drilling apparatus |
US5568838A (en) | 1994-09-23 | 1996-10-29 | Baker Hughes Incorporated | Bit-stabilized combination coring and drilling system |
CA2165730A1 (en) | 1994-12-20 | 1996-06-21 | Michael G. Azar | Self-centering polycrystalline diamond drill bit |
BR9502857A (en) | 1995-06-20 | 1997-09-23 | Sandvik Ab | Rock Drill Tip |
US5678644A (en) | 1995-08-15 | 1997-10-21 | Diamond Products International, Inc. | Bi-center and bit method for enhancing stability |
US5992548A (en) | 1995-08-15 | 1999-11-30 | Diamond Products International, Inc. | Bi-center bit with oppositely disposed cutting surfaces |
US5904213A (en) | 1995-10-10 | 1999-05-18 | Camco International (Uk) Limited | Rotary drill bits |
US5896938A (en) | 1995-12-01 | 1999-04-27 | Tetra Corporation | Portable electrohydraulic mining drill |
US6533050B2 (en) | 1996-02-27 | 2003-03-18 | Anthony Molloy | Excavation bit for a drilling apparatus |
GB9612609D0 (en) | 1996-06-17 | 1996-08-21 | Petroline Wireline Services | Downhole apparatus |
US5732784A (en) | 1996-07-25 | 1998-03-31 | Nelson; Jack R. | Cutting means for drag drill bits |
US5979571A (en) | 1996-09-27 | 1999-11-09 | Baker Hughes Incorporated | Combination milling tool and drill bit |
BE1010802A3 (en) | 1996-12-16 | 1999-02-02 | Dresser Ind | Drilling head. |
US5950743A (en) | 1997-02-05 | 1999-09-14 | Cox; David M. | Method for horizontal directional drilling of rock formations |
US5957223A (en) | 1997-03-05 | 1999-09-28 | Baker Hughes Incorporated | Bi-center drill bit with enhanced stabilizing features |
US5947214A (en) | 1997-03-21 | 1999-09-07 | Baker Hughes Incorporated | BIT torque limiting device |
US5957225A (en) | 1997-07-31 | 1999-09-28 | Bp Amoco Corporation | Drilling assembly and method of drilling for unstable and depleted formations |
US6039131A (en) | 1997-08-25 | 2000-03-21 | Smith International, Inc. | Directional drift and drill PDC drill bit |
US5967247A (en) | 1997-09-08 | 1999-10-19 | Baker Hughes Incorporated | Steerable rotary drag bit with longitudinally variable gage aggressiveness |
US5947215A (en) | 1997-11-06 | 1999-09-07 | Sandvik Ab | Diamond enhanced rock drill bit for percussive drilling |
US6213226B1 (en) | 1997-12-04 | 2001-04-10 | Halliburton Energy Services, Inc. | Directional drilling assembly and method |
US6202761B1 (en) | 1998-04-30 | 2001-03-20 | Goldrus Producing Company | Directional drilling method and apparatus |
US6186251B1 (en) | 1998-07-27 | 2001-02-13 | Baker Hughes Incorporated | Method of altering a balance characteristic and moment configuration of a drill bit and drill bit |
US6131675A (en) | 1998-09-08 | 2000-10-17 | Baker Hughes Incorporated | Combination mill and drill bit |
US6513606B1 (en) | 1998-11-10 | 2003-02-04 | Baker Hughes Incorporated | Self-controlled directional drilling systems and methods |
US6340064B2 (en) | 1999-02-03 | 2002-01-22 | Diamond Products International, Inc. | Bi-center bit adapted to drill casing shoe |
US6269893B1 (en) | 1999-06-30 | 2001-08-07 | Smith International, Inc. | Bi-centered drill bit having improved drilling stability mud hydraulics and resistance to cutter damage |
US6257356B1 (en) * | 1999-10-06 | 2001-07-10 | Aps Technology, Inc. | Magnetorheological fluid apparatus, especially adapted for use in a steerable drill string, and a method of using same |
US6668949B1 (en) | 1999-10-21 | 2003-12-30 | Allen Kent Rives | Underreamer and method of use |
US6394200B1 (en) | 1999-10-28 | 2002-05-28 | Camco International (U.K.) Limited | Drillout bi-center bit |
US6510906B1 (en) | 1999-11-29 | 2003-01-28 | Baker Hughes Incorporated | Impregnated bit with PDC cutters in cone area |
US6364034B1 (en) | 2000-02-08 | 2002-04-02 | William N Schoeffler | Directional drilling apparatus |
US6622803B2 (en) | 2000-03-22 | 2003-09-23 | Rotary Drilling Technology, Llc | Stabilizer for use in a drill string |
US6439326B1 (en) | 2000-04-10 | 2002-08-27 | Smith International, Inc. | Centered-leg roller cone drill bit |
US6474425B1 (en) | 2000-07-19 | 2002-11-05 | Smith International, Inc. | Asymmetric diamond impregnated drill bit |
US6484825B2 (en) | 2001-01-27 | 2002-11-26 | Camco International (Uk) Limited | Cutting structure for earth boring drill bits |
US6822579B2 (en) | 2001-05-09 | 2004-11-23 | Schlumberger Technology Corporation | Steerable transceiver unit for downhole data acquistion in a formation |
US6601454B1 (en) | 2001-10-02 | 2003-08-05 | Ted R. Botnan | Apparatus for testing jack legs and air drills |
US6732817B2 (en) | 2002-02-19 | 2004-05-11 | Smith International, Inc. | Expandable underreamer/stabilizer |
US6729420B2 (en) | 2002-03-25 | 2004-05-04 | Smith International, Inc. | Multi profile performance enhancing centric bit and method of bit design |
US6929076B2 (en) | 2002-10-04 | 2005-08-16 | Security Dbs Nv/Sa | Bore hole underreamer having extendible cutting arms |
US6953096B2 (en) | 2002-12-31 | 2005-10-11 | Weatherford/Lamb, Inc. | Expandable bit with secondary release device |
GB0503742D0 (en) * | 2005-02-11 | 2005-03-30 | Hutton Richard | Rotary steerable directional drilling tool for drilling boreholes |
CN101589204A (en) * | 2006-12-04 | 2009-11-25 | 贝克休斯公司 | The expansible reamer and the using method thereof that are used to application with boring |
-
2011
- 2011-03-15 US US13/048,595 patent/US20120234604A1/en not_active Abandoned
- 2011-03-15 US US13/048,707 patent/US8342266B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4491738A (en) * | 1981-11-24 | 1985-01-01 | Shell Internationale Research Maatschappij, B.V. | Means for generating electricity during drilling of a borehole |
US5553678A (en) * | 1991-08-30 | 1996-09-10 | Camco International Inc. | Modulated bias units for steerable rotary drilling systems |
US5803185A (en) * | 1995-02-25 | 1998-09-08 | Camco Drilling Group Limited Of Hycalog | Steerable rotary drilling systems and method of operating such systems |
US5787998A (en) * | 1995-08-03 | 1998-08-04 | Flowdril Corporation | Down hole pressure intensifier and drilling assembly and method |
US7931098B2 (en) * | 2003-09-15 | 2011-04-26 | Baker Hughes Incorporated | Steerable bit system assembly and methods |
US20110036631A1 (en) * | 2008-04-18 | 2011-02-17 | Dreco Energy Services Ltd. | Method and apparatus for controlling downhole rotational rate of a drilling tool |
Cited By (6)
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---|---|---|---|---|
WO2018017092A1 (en) | 2016-07-21 | 2018-01-25 | Halliburton Energy Services, Inc. | Valve mechanism for rotary steerable tool and methods of use |
US11015393B2 (en) | 2016-07-21 | 2021-05-25 | Halliburton Energy Services, Inc. | Valve mechanism for rotary steerable tool and methods of use |
US20210404260A1 (en) * | 2017-06-26 | 2021-12-30 | Schlumberger Technology Corporation | Downhole steering system and methods |
US11788359B2 (en) * | 2017-06-26 | 2023-10-17 | Schlumberger Technology Corporation | Downhole steering system and methods |
WO2020005297A1 (en) * | 2018-06-29 | 2020-01-02 | Halliburton Energy Services, Inc. | Multi-lateral entry tool with independent control of functions |
US10876377B2 (en) | 2018-06-29 | 2020-12-29 | Halliburton Energy Services, Inc. | Multi-lateral entry tool with independent control of functions |
Also Published As
Publication number | Publication date |
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US20120234606A1 (en) | 2012-09-20 |
US8342266B2 (en) | 2013-01-01 |
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