Oscillating shear valve for mud pulse telemetry and associated methods of use
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-047/18
G01V-003/34
G01V-003/00
출원번호
US-0223169
(2002-08-19)
발명자
/ 주소
Hahn, Detlef
Peters, Volker
Rouatbi, Cedric
Eggers, Heiko
출원인 / 주소
Baker Hughes Incorporated
대리인 / 주소
Madan, Mossman &
인용정보
피인용 횟수 :
23인용 특허 :
55
초록▼
An oscillating shear valve system for generating pressure fluctuations in a flowing drilling fluid comprising a stationary stator and an oscillating rotor, both with axial flow passages. The rotor oscillates in close proximity to the stator, at least partially blocking the flow through the stator an
An oscillating shear valve system for generating pressure fluctuations in a flowing drilling fluid comprising a stationary stator and an oscillating rotor, both with axial flow passages. The rotor oscillates in close proximity to the stator, at least partially blocking the flow through the stator and generating oscillating pressure pulses. The rotor passes through two zero speed positions during each cycle, facilitating rapid changes in signal phase, frequency, and/or amplitude facilitating enhanced, multivalent data encoding. The rotor is driven by a motorized gear drive. In one embodiment, a torsional spring is attached to the motor and the resulting spring mass system is designed to be near resonance at the desired pulse frequency. The system enables the use of multivalent encoding schemes for increasing data rates.
대표청구항▼
1. A mud pulse telemetry system, comprising:a. a drillstring having a drilling fluid flowing therein, b. a pulser disposed in said drillstring, the pulser comprising: i. a non-rotating stator; ii. a rotor proximate the stator; iii. a motor that drives the rotor in a controllable rotationally oscilla
1. A mud pulse telemetry system, comprising:a. a drillstring having a drilling fluid flowing therein, b. a pulser disposed in said drillstring, the pulser comprising: i. a non-rotating stator; ii. a rotor proximate the stator; iii. a motor that drives the rotor in a controllable rotationally oscillating manner for generating pressure fluctuations in the drilling fluid, the motor controlling a signal phase relationship of the rotor according to a predetermined phase shift encoding (PSK) scheme to transmit signals using the pressure fluctuations in the flowing fluid, the PSK scheme comprising: driving the rotor in an oscillatory periodic motion with a first predetermined signal phase relationship; and changing a drive signal to a second predetermined signal phase relationship according to the PSK scheme at a predetermined rotor speed. 2. The mud pulse telemetry system of claim 1 wherein the PSK scheme further comprises attaining the second predetermined phase relationship in a single oscillatory period.3. The mud pulse telemetry system of claim 1 wherein the PSK scheme further comprises changing a drive signal to change the oscillatory periodic motion from the second predetermined phase to the first predetermined phase.4. The mud pulse telemetry system of claim 1 wherein the predetermined rotor speed for changing the drive signal comprises a zero speed transition.5. The mud pulse system of claim 1 further comprising a drive system that drives the motor in a controllably rotationally oscillating manner.6. The mud pulse telemetry system of claim 5 wherein the drive system comprises one of (i) a planetary drive gear, (ii) a cam system that converts continuous motor rotation to oscillatory rotor motion, and (iii) a pin and crank system that is adapted to provide an adjustable eccentricity for adjusting the oscillating rotational motion of the rotor.7. The mud pulse telemetry system of claim 1 further comprising a torsion spring cooperatively acting with the motor to reduce power required to drive the rotor.8. The mud pulse telemetry system of claim 7 wherein the torsion spring comprises:i. an outer magnet carrier adapted to move axially within a pulser housing; and ii. an inner magnet carrier adapted to be attached to a motor drive shaft that drives the rotor. 9. The mud pulse telemetry system of claim 1 further comprising a control circuit that controls the motor motion.10. A mud pulse telemetry system, comprising:a. a drillstring having a drilling fluid flowing therein, b. a pulser disposed in said drillstring, the pulser comprising: i. a non-rotating stator ii. a rotor proximate the stator; iii. a motor that drives the rotor in a controllable rotationally oscillating manner for generating pressure fluctuations in the drilling fluid, the motor controlling a signal frequency of the rotor according to a predetermined frequency shift encoding (FSK) scheme to transmit signals using the pressure fluctuations in the flowing fluid, the FSK scheme comprising: driving the rotor in an oscillatory periodic motion at a first predetermined frequency; and changing a drive signal to a second predetermined frequency according to the FSK scheme at a predetermined rotor speed. 11. The mud pulse telemetry system of claim 10 wherein the FSK scheme further comprises attaining the second predetermined frequency in a single oscillatory period.12. The mud pulse telemetry system of claim 10 wherein the FSK scheme further comprises changing a drive signal to change the oscillatory periodic motion from the second predetermined frequency to the first predetermined frequency to generate encoded signals.13. The mud pulse telemetry system of claim 10 wherein the predetermined rotor speed for changing the drive signal comprises a zero speed transition.14. The mud pulse system of claim 10 further comprising a drive system that drives the motor in a controllably rotationally oscillating manner.15. The mud pulse telemetry system of claim 14 wherein the drive system comprises one of (i) a planetary drive gear, (ii) a cam system that converts continuous motor rotation to oscillatory rotor motion, and (iii) a pin and crank system that is adapted to provide an adjustable eccentricity for adjusting the oscillating rotational motion of the rotor.16. The mud pulse telemetry system of claim 10 further comprising a torsion spring cooperatively acting with the motor to reduce power required to drive the rotor.17. The mud pulse telemetry system of claim 16 wherein the torsion spring comprises:i. an outer magnet carrier adapted to move axially within a pulser housing; and ii. an inner magnet carrier adapted to be attached to a motor drive shaft that drives the rotor. 18. The mud pulse telemetry system of claim 10 further comprising a control circuit that controls the motor motion.19. A mud pulse telemetry system, comprising:a. a drillstring having a drilling fluid flowing therein, b. a pulser disposed in said drillstring, the pulser comprising: i. a non-rotating stator; ii. a rotor proximate the stator; iii. a motor that drives the rotor in a controllable rotationally oscillating manner for generating pressure fluctuations in the drilling fluid, the motor controlling the rotor according to a predetermined amplitude shift encoding (ASK) scheme to transmit signals using the pressure fluctuations in the flowing fluid, the ASK scheme comprising: driving the rotor in an oscillatory periodic motion through a first predetermined rotational angle for generating a first pulse amplitude; and changing a drive signal to a second predetermined rotational angle according to the ASK scheme at a predetermined rotor speed. 20. The mud pulse telemetry system of claim 19 wherein the ASK scheme further comprises attaining the second predetermined rotational angle in a single oscillatory period.21. The mud pulse telemetry system of claim 19 wherein the ASK scheme further comprises changing a drive signal to change the oscillatory periodic motion from the second predetermined rotational angle to the first predetermined rotational angle to generate signals through the drilling fluid.22. The mud pulse telemetry system of claim 19 wherein the predetermined rotor speed for changing the drive signal comprises a zero speed transition.23. The mud pulse system of claim 19 further comprising a drive system that drives the motor in a controllably rotationally oscillating manner.24. The mud pulse telemetry system of claim 23 wherein the drive system comprises one of (i) a planetary drive gear, (ii) a cam system that converts continuous motor rotation to oscillatory rotor motion, and (iii) a pin and crank system that is adapted to provide an adjustable eccentricity for adjusting the oscillating rotational motion of the rotor.25. The mud pulse telemetry system of claim 19 further comprising a torsion spring cooperatively acting with the motor to reduce power required to drive the rotor.26. The mud pulse telemetry system of claim 25 wherein the torsion spring comprises:i. an outer magnet carrier adapted to move axially within a pulser housing; and ii. an inner magnet carrier adapted to be attached to a motor drive shaft that dives the rotor. 27. The mud pulse telemetry system of claim 19 further comprising a control circuit that controls the motor motion.28. A mud pulse telemetry system, comprising:a. a drillstring having a drilling fluid flowing therein, b. a pulser disposed in said drillstring, the pulser comprising: i. a non-rotating stator; ii. a rotor proximate the stator; iii. a motor that drives the rotor in a controllable rotationally oscillating manner for generating pressure fluctuations in the drilling fluid, the motor controlling the rotor according to a predetermined combination of an amplitude shift encoding (ASK) scheme and a phase shift encoding (PSK) scheme to transmit signals using the pressure fluctuations in the flowing fluid, the combination of the ASK and PSK schemes comprising: driving the rotor in an oscillatory periodic motion through a first predetermined rotational angle at a first phase angle thereby generating a first pulse amplitude at a first phase; and changing a drive signal through a second predetermined rotational angle at a second predetermined phase angle to generate a second pulse amplitude at a second phase. 29. The mud pulse telemetry system of claim 28 wherein the combination of the ASK and PSK schemes further comprises attaining the second predetermined rotational angle at the second predetermined phase relationship in a single oscillatory period.30. The mud pulse telemetry system of claim 28 wherein the combination of ASK and PSK schemes further comprises changing a drive signal to change the oscillatory periodic motion from the second pulse amplitude at the second phase to the first pulse amplitude at the first phase.31. The mud pulse system of claim 28 further comprising a drive system that drives the motor in a controllably rotationally oscillating manner.32. The mud pulse telemetry system of claim 31 wherein the drive system comprises one of (i) a planetary drive gear, (ii) a cam system that converts continuous motor rotation to oscillatory rotor motion, and (iii) a pin and crank system that is adapted to provide an adjustable eccentricity for adjusting the oscillating rotational motion of the rotor.33. The mud pulse telemetry system of claim 28 further comprising a torsion spring cooperatively acting with the motor to reduce power required to drive the rotor.34. The mud pulse telemetry system of claim 33 wherein the torsion spring comprises: an outer magnet carrier adapted to move axially within a pulser housing; and ii. an inner magnet carrier adapted to be attached to a motor drive shaft that drives the rotor.35. The mud pulse telemetry system of claim 28 further comprising a control circuit that controls the motor motion.36. A mud pulse telemetry system, comprising:a. a drillstring having a drilling fluid flowing therein, b. a pulser disposed in said drillstring, the pulser comprising: i. a non-rotating stator; ii. a rotor proximate the stator; iii. a motor that drives the rotor in a controllable rotationally oscillating manner for generating pressure fluctuations in the drilling fluid, the motor controlling the rotor according to a predetermined combination of an amplitude shift and frequency shift encoding schemes to transmit signals using the pressure fluctuations in the flowing fluid, the combination of the AKS and FSK schemes comprising: driving the rotor in an oscillatory periodic motion with through a first predetermined rotational angle at a first frequency to generate a first pulse amplitude at the first frequency; and changing a drive signal to drive the rotor through a second predetermined rotational angle at a second frequency to generate a second amplitude pulse-at the second frequency. 37. The mud pulse telemetry system of claim 36 wherein the combination of ASK and FSK schemes further comprises attaining the second predetermined rotational angle at the second frequency in a single oscillatory period.38. The mud pulse telemetry system of claim 36 wherein the combination of ASK and FSK schemes further comprises changing a drive signal to change the oscillatory periodic motion from the second predetermined rotational angle at the second frequency to the first predetermined rotational angle at the first frequency.39. The mud pulse system of claim 36 further comprising a drive system that drives the motor in a controllably rotationally oscillating manner.40. The mud pulse telemetry system of claim 39 wherein the drive system comprises one of (i) a planetary drive gear, (ii) a cam system that converts continuous motor rotation to oscillatory rotor motion, and (iii) a pin and crank system that is adapted to provide an adjustable eccentricity for adjusting the oscillating rotational motion of the rotor.41. The mud pulse telemetry system of claim 36 further comprising a torsion spring cooperatively acting with the motor to reduce power required to drive the rotor.42. The mud pulse telemetry system of claim 41 wherein the torsion spring comprises:i. an outer magnet carrier adapted to move axially within a pulser housing; and ii. an inner magnet carrier adapted to be attached to a motor drive shaft that drives the rotor. 43. The mud pulse telemetry system of claim 36 further comprising a control circuit that controls the motor motion.
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이 특허에 인용된 특허 (55)
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Bodine Albert G. (7877 Woodley Ave. Van Nuys CA 91406), Drilling system and method employing torsional sonic vibration for lubrication of journal type bit bearings.
Malone David (Sugar Land TX) Johnson Mike (Houston TX), Logging while drilling tools, systems, and methods capable of transmitting data at a plurality of different frequencies.
Biglin ; Jr. Denis P. ; Turner William E. ; Helm Walter A., Method and apparatus for communicating with devices downhole in a well especially adapted for use as a bottom hole mud flow sensor.
Scherbatskoy Serge A. (3921 Clayton Rd. East Fort Worth TX 76116), Method and apparatus for transmitting information in a borehole employing discrimination.
Turner, William Evans; Biglin, Jr., Denis P., Method and apparatus for transmitting information to the surface from a drill string down hole in a well.
Westlake John H. (Calgary CAX) Leach Clifford H. (Penticton CAX) Ainsworth Clifford L. (Calgary CAX), Method of and apparatus for telemetering information from a point in a well borehole to the earth\s surface.
Kotlyar Oleg (Salt Lake City UT), Mud pulse valve and method of valving in a mud flow for sharper rise and fall times, faster data pulse rates, and longer.
Meek Dale E. (Sugarland TX) Vaynshteyn Vladimir (Sugarland TX), Multiple wellbore tool apparatus including a plurality of microprocessor implemented wellbore tools for operating a corr.
Moriarty Keith A., Pressure pulse generator for measurement-while-drilling systems which produces high signal strength and exhibits high resistance to jamming.
Russell Michael K. (Lynworth House ; 54 High Street Prestbury ; Cheltenham GB2) Russell Anthony W. (Drachlaw Turriff ; Aberdeenshire GB6), Signal transmitters.
Logan, Aaron W.; Switzer, David A.; Logan, Justin C.; Liu, Jili, Fluid pressure pulse generator with low and high flow modes for wellbore telemetry and method of using same.
Logan, Aaron W.; Liu, Jili; Switzer, David A.; Logan, Justin C., Mud pulse telemetry apparatus with a pressure transducer and method of operating same.
Logan, Aaron W.; Liu, Jili; Switzer, David A.; Logan, Justin C., Mud pulse telemetry apparatus with a pressure transducer and method of operating same.
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