Long-stroke pumping unit 机翻标题: 暂无翻译,请尝试点击翻译按钮。

公开号/公开日
WO2016137986 A2 2016-09-01 [WO2016137986]WO2016137986 A3 2016-12-29 [WO2016137986] / 2016-09-012016-12-29
申请号/申请日
2016WO-US19121 / 2016-02-23
发明人
ROBISON CLARK E;LEMBCKE JEFFREY JOHN;PONS VICTORIA M;HALL WILLIAM KEVIN;STACHOWIAK JR JOHN EDWARD;THOMAS BENSON;CHRISTIAN SEAN M;PAULET BRYAN A;BASLER HERMANN;
申请人
WEATHERFORD TECHNOLOGY HOLDINGS;
主分类号
IPC分类号
E21B-043/12E21B-047/00F04B-047/02F04B-047/14F04B-049/20
摘要
(WO2016137986) A long-stroke pumping unit (101k) includes a tower (111); a counterweight assembly (110) movable along the tower; a crown (7) mounted atop the tower; a sprocket (108k) supported by the crown and rotatable relative thereto; and a belt (109).  The unit further includes a motor (106) having a stator mounted to the crown and a rotor torsionally connected to the sprocket; and a sensor (115t) for detecting position of the counterweight assembly.  The pumping unit may include a dynamic control system for controlling a speed of a motor.
机翻摘要
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地址
代理人
代理机构
;
优先权号
2015US-62119305 2015-02-23 2015US-62137524 2015-03-24
主权利要求
(WO2016137986)  Claims:   1 .  A pumping unit, comprising:    a prime mover for reciprocating a rod string; and    a dynamic control system for controlling a speed of the prime mover and comprising:    a load cell for measuring force exerted on the rod string; a sensor for detecting position of the rod string;    an accelerometer for measuring vibration of the rod string or of a production string;    a meter for measuring power consumed by the prime mover; and a controller operable to:    determine position of and load on a downhole pump connected to the rod string and the production string;    determine acceptability of two or more parameters of the pumping unit;    select a prime objective based on a hierarchy of the parameters and the acceptability of the parameters; and determine an upstroke speed, a downstroke speed, and turnaround accelerations and decelerations for the prime objective.   2. The unit of claim 1 , wherein the two or more parameters are selected from a group consisting of: production rate, efficiency, fillage of the downhole pump, fluid level of the downhole pump, static and dynamic stress of the rod string, torque and torque factor of the prime mover, vibration of the rod string, vibration of the production string, reciprocation speed of the rod string, fluid velocity in the production string, drag of production fluid on the rod string, and gas-oil ratio of the production fluid.   3. The unit of claims 1 or 2, wherein the accelerometer is integrated within the load cell for measuring the vibration of the rod string.   4. The unit of claims 1 or 2, wherein the accelerometer is mounted on a tubular body for assembly as part of the production string.    5. The unit of any of claims 1 -4, wherein the accelerometer is a dual axis microelectromechanical system.   6.  The unit of any of claims 1 -5, wherein:    the prime mover is an electric three phase motor, and    the dynamic control system further comprises a three phase variable speed motor driver.   7.  The unit of any of claims 1 -6, further comprising:    a tower;    a counterweight assembly movable along the tower;    a crown mounted atop the tower;    a belt having a first end connected to the counterweight assembly and having a second end connectable to the rod string,    wherein the sensor is operable to detect a position of the rod string by detecting a position of the counterweight assembly.   8. The unit of any of claims 1 -7, wherein the sensor is an ultrasonic rangefinder comprising a long range transducer and a short range transducer.   9.  The unit of any of claims 1 -7, wherein the sensor is a linear variable differential transformer (LVDT) comprising:    a string connected to the counterweight assembly and wound onto a spool; a screw shaft engaged with a thread of the spool;    an LVDT core mounted to the screw shaft; and    an LVDT body at least partially receiving the LVDT core.   10. The unit of any of claims 1 -9, wherein the controller is further operable to monitor for failure of the rod string or load belt and control descent of the counterweight assembly in response to detection of the failure.   1 1 .  The unit of any of claims 1 -10, further comprising    a drive sprocket torsionally connected to the prime mover;    an idler sprocket connected to the tower;    a chain for orbiting around the sprockets; and    a carriage for longitudinally connecting the counterweight assembly to the chain while allowing relative transverse movement of the chain relative to the counterweight assembly.   12. The unit of claim any of claims 1 -1 1 , further comprising a drum supported by the crown and rotatable relative thereto, wherein the belt extends over the drum.   13. The unit of any of claims 1 -12, wherein the controller is a programmable logic controller, application-specific integrated circuit, or field-programmable gate array.   14. The unit of any of claims 1 -13, wherein the controller is further operable to monitor for failure or imminent failure of the pumping unit and to shut down the pumping unit in response to detection of the failure or imminent failure.   15. The unit of any of claims 1 -14, wherein the controller is further operable to monitor for failure or imminent failure of the pumping unit and to operate the pumping unit using an emergency hierarchy and emergency acceptability values in response to detection of the failure or imminent failure.   16.  A long-stroke pumping unit, comprising:    a tower;    a counterweight assembly movable along the tower;    a crown mounted atop the tower;    a sprocket supported by the crown and rotatable relative thereto;    a belt having a first end connected to the counterweight assembly, extending over and meshing with the sprocket, and having a second end connectable to a rod string;    a motor having a stator mounted to the crown and a rotor torsionally connected to the sprocket; and    a sensor for detecting position of the counterweight assembly.    17. The unit of claim 16, further comprising a second sprocket and a drum, each supported by the crown and rotatable relative thereto, wherein the sprockets straddle the drum.   18.  The unit of claims 16 or 17, wherein the belt comprises:    a body made from an elastomer or elastomeric copolymer;    a mesh disposed in the body and extending along a length thereof and across a width thereof; and    two rows of sprocket holes, each row formed adjacent to and along a respective edge of the belt and each hole formed through the body and the mesh.   19.  The unit of claims 16 or 17, wherein the belt comprises:    a body made from an elastomer or elastomeric copolymer;    a ply of cords disposed in the body, each cord extending across a width thereof;    two rows of sprocket holes, each row formed adjacent to and along a respective edge of the belt and each hole formed through the body and the plies; and    two pairs of ropes disposed in the body, each rope extending along a length thereof and each pair straddling the sprocket holes.   20.  The unit of claim 19, wherein:    the belt further comprises a second ply of cords disposed in the body, each cord extending across the width thereof, and    each ply is located adjacent to a respective top and bottom of the ropes.   21 .  The unit of claim 16, wherein the belt comprises:    a body made from an elastomer or elastomeric copolymer;    alternating teeth and flats, each tooth and each flat formed across an inner surface of the body; and    a ply of cords disposed in the body adjacent to the inner surface, each cord extending along a length thereof.    22.  The unit of claim 21 , wherein the belt further comprises:    a fabric molded into the inner surface of the body; and    a cover made from an engineering thermoplastic and bonded to the fabric.   23. The unit of any of claims 16-22, further comprising a gear box torsionally connecting the rotor to the sprocket.   24. The unit of claim 23, wherein the gear box is planetary.   25. The unit of any of claims 16-24, wherein the sensor is a laser rangefinder, ultrasonic rangefinder, string potentiometer, or linear variable differential transformer (LVDT).   26. The unit of any of claims 16-25, wherein the motor is an electric three phase motor.   27.  The unit of any of claims 16-26, further comprising:    a variable speed motor driver in electrical communication with the motor; and    a controller in data communication with the motor driver and the sensor and operable to control speed thereof.   28. The unit of any of claims 16-27, wherein the controller is further operable to monitor the sensor for failure of the rod string and instruct the motor driver to control descent of the counterweight assembly in response to detection of the failure.   29.  The unit of any of claims 16-27, further comprising:    a power converter in electrical communication with the motor driver; and a battery in electrical communication with the power converter and operable to store electrical power generated by the motor during a downstroke of the pumping unit.    30. The unit of any of claims 16-29, wherein the electric motor is a switched reluctance or permanent magnet motor.   31 .  A long-stroke pumping unit, comprising:    a tower;    a crown mounted atop the tower;    a spool supported by the crown and rotatable relative thereto;    a belt having an upper end mounted to the spool, wrapped around the spool, and having a lower end connectable to a rod string;    a motor having a stator mounted to the crown and a rotor torsionally connected to the spool; and    a torsion spring having one end connected to the crown and the other end connected to the spool for biasing the spool toward wrapping of the belt thereon.   32. The unit of claim 31 , further comprising a gear box torsionally connecting the rotor to the spool.   33. The unit of claim 32, wherein the gear box is planetary.   34. The unit of any of claims 31 -33, wherein the motor is an electric three phase motor.   35.  The unit of any of claims 31 -34, further comprising:    a sensor for detecting position of the lower end of the belt    a variable speed motor driver in electrical communication with the motor; and    a controller in data communication with the motor driver and the sensor and operable to control speed thereof.   36.  The unit of any of claims 31 -35, further comprising:    a power converter in electrical communication with the motor driver; and    a battery in electrical communication with the power converter and operable to store electrical power generated by the motor during a downstroke of the pumping unit.
法律状态
(WO2016137986) LEGAL DETAILS FOR WO2016137986  Actual or expected expiration date=2018-09-24    Legal state=ALIVE    Status=PENDING     Event publication date=2016-02-23  Event code=WO/APP  Event indicator=Pos  Event type=Examination events  Application details  Application country=WO WOUS2016019121  Application date=2016-02-23  Standardized application number=2016WO-US19121     Event publication date=2016-09-01  Event code=WO/A2  Event type=Examination events  International application published with declaration under Article 17 (2) (a)  Publication country=WO  Publication number=WO2016137986  Publication stage Code=A2  Publication date=2016-09-01  Standardized publication number=WO2016137986     Event publication date=2016-12-29  Event code=WO/A3  Event indicator=Pos  Event type=Examination events  Later publication of ISR with revised front page  Publication country=WO  Publication number=WO2016137986  Publication stage Code=A3  Publication date=2016-12-29  Standardized publication number=WO2016137986  LEGAL DETAILS FOR DESIGNATED STATE EP  Actual or expected expiration date=2035-03-24    Legal state=ALIVE    Status=PENDING   Corresponding cc:  Designated or member state=EP Corresponding appl: EP16714600    Event publication date=2016-10-19  Event code=WO/121  Event type=Designated states  EP: The EPO has been informed by wipo that ep was designated in this application Corresponding cc:  Designated or member state=EP
专利类型码
A2A3
国别省市代码
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