IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0959970
(2007-12-19)
|
등록번호 |
US-7699071
(2010-05-20)
|
발명자
/ 주소 |
- Burkhard, Alan Wayne
- Thiessen, Nicolas Christopher Wade
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
9 |
초록
▼
A method of controlling one or more operating pressures within a subterranean borehole that includes a choke assembly is disclosed. The choke assembly may include a housing having an inlet passage, an axial bore, and a chamber, wherein a portion of the axial bore forms an outlet passage, and a choke
A method of controlling one or more operating pressures within a subterranean borehole that includes a choke assembly is disclosed. The choke assembly may include a housing having an inlet passage, an axial bore, and a chamber, wherein a portion of the axial bore forms an outlet passage, and a choke member adapted for movement in the housing to control the flow of a fluid from the inlet passage to the outlet passage. The method may include applying a closing force to move the choke member toward a closed position, and applying a bias force to the choke member when in the closed position to reduce an overpressure required to initiate movement of the choke member from the closed position.
대표청구항
▼
What is claimed: 1. A fluid control system, comprising a choke assembly comprising: a housing having an inlet passage, an axial bore, and a chamber, wherein a portion of the axial bore forms an outlet passage; and a choke member adapted for movement in the housing to control the flow of a fluid fro
What is claimed: 1. A fluid control system, comprising a choke assembly comprising: a housing having an inlet passage, an axial bore, and a chamber, wherein a portion of the axial bore forms an outlet passage; and a choke member adapted for movement in the housing to control the flow of a fluid from the inlet passage to the outlet passage; a controller to control a closing force applied to the choke member, thereby forcing the choke member toward a closed position, and to control a bias force applied to the choke member, thereby reducing an overpressure required to initiate movement of the choke member from the closed position; a linear motor to apply the closing force and the bias force; wherein the fluid applies a force on one end of the choke member; wherein the bias force and the closing force are applied on an other end of the choke member, wherein the difference in applied forces controls the position of the choke member in the housing. 2. The fluid control system of claim 1, wherein the closing force is applied directly or indirectly by the linear motor. 3. The fluid control system of claim 1, wherein the bias force is supplied directly or indirectly by the linear motor. 4. The fluid control system of claim 1, wherein the closing force and the bias force are supplied directly or indirectly by the linear motor. 5. The fluid control system of claim 1, further comprising a lever coupling the linear motor to the choke assembly. 6. The fluid control system of claim 1, wherein the linear motor comprises a stationary component, a movable component, and a mass disposed on the movable component, wherein the closing and bias forces applied on the other end of the choke member comprise a weight of the mass and a force generated by the linear motor. 7. The fluid control system of claim 1, wherein the linear motor comprises a stationary component, a movable component, and a spring coupled to the movable component, wherein the closing and bias forces applied on the other end of the choke member comprise a force provided by the spring and a force generated by the linear motor. 8. The fluid control system of claim 1, the system further comprising: a source of control fluid connected to the chamber so that the control fluid applies the closing and bias forces on the other end of the choke member to control a position of the choke member in the housing; and a linear motor to control the closing and bias forces applied by the control fluid. 9. The fluid control system of claim 8, wherein the source of control fluid comprises a hydraulic cylinder, and wherein the linear motor is directly coupled to the hydraulic cylinder. 10. The fluid control system of claim 8, wherein the source of control fluid comprises a hydraulic cylinder, and wherein the linear motor is indirectly coupled to the hydraulic cylinder. 11. The fluid control system of claim 10, further comprising a lever and a pivot, wherein the lever couples the linear motor to the hydraulic cylinder. 12. The fluid control system of claim 8, wherein the linear motor comprises a stationary component, a movable component, and a weight disposed on the movable component, wherein the weight and the linear motor contribute to the force applied by the control fluid. 13. The fluid control system of claim 8, wherein the linear motor comprises a stationary component, a movable component, and a spring coupled to the movable component, wherein the spring and the linear motor contribute to the force applied by the control fluid. 14. The fluid control system of claim 1, wherein the linear motor is a tubular linear motor. 15. The fluid control system of claim 1, wherein the linear motor is a flat linear motor.
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