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1. (WO2018227003) SOUPAPE DE SÉCURITÉ À RÉGLAGE PROFOND
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

1. An actuator sub for generating hydraulic pressure, the actuator sub comprising:

(a) a sub housing including (i) an outer surface, (ii) a main flow passage extending though the sub housing, and (iii) a wall space formed between the main flow passage and the housing outer surface;

(b) a first and second hydraulic tube in the wall space engaging a manifold, where the manifold provides a fluid connection between the hydraulic tubes;

(c) an equalization port communicating between the first hydraulic tube and the main flow passage;

(d) a piston positioned in the first hydraulic tube between the equalization port and the manifold;

(e) an drive motor driving an bi-directional first hydraulic motor, the drive motor and the first hydraulic motor being positioned in the second hydraulic tube and the first hydraulic motor being configured to output fluid to a fluid outlet of the second hydraulic tube.

2. The actuator sub of claim 1, wherein the bi-directional hydraulic motor is a swashplate pump.

3. The actuator sub of claim 1, further comprising the absence of a check valve between the hydraulic motor and the outlet of the second hydraulic tube.

4. The actuator sub of claim 1, wherein a biasing mechanism biases the piston in a direction toward the manifold.

5. The actuator sub of claim 4, wherein the biasing mechanism is a spring.

6. The actuator sub of claim 4, wherein the second hydraulic tube is filled with a fluid moved by the hydraulic motor.

7. The actuator sub of claim 6, wherein a volume of the first tube above the piston is filled with the fluid and the biasing mechanism places a positive pressure on the fluid.

8. The actuator sub of claim 1, wherein the hydraulic motor, when not under power, allows the reverse flow of fluid through the hydraulic motor.

9. The actuator sub of claim 1, wherein the hydraulic tubes contain a dielectric fluid.

10. The actuator sub of claim 1, wherein the drive motor is an electric motor.

11. The actuator sub of claim 10, wherein the electric motor is connected to a power supply at the well surface.

12. The actuator sub of claim 1, wherein the drive motor is a second hydraulic motor powered by pressurized fluid circulated downhole by a surface pump.

13. The actuator sub of claim 1, further comprising:

(a) a safety valve sub is connected proximate the actuator sub, the safety valve sub including a flow tube, return spring and flapper, wherein force on the flow tube compresses the return spring and holds the flapper in an open position; and

(b) a conduit connecting the fluid outlet of the actuator sub to the flow of the safety valve tube.

14. A subsurface safety valve comprising:

(a) a flapper moved between an open and closed position by a flow tube;

(b) a return spring biasing the flow tube in a flapper closed position;

(c) an activating piston acting on the flow tube;

(d) an actuator assembly for generating hydraulic pressure on the activating piston, the actuator assembly comprising:

(i) an assembly housing including (1) an outer surface, (2) a main flow passage extending though the sub housing, and (3) a wall space formed between the main flow passage and the housing outer surface;

(ii) a first and second hydraulic tube in the wall space engaging a manifold, where the manifold provides a fluid connection between the hydraulic tubes;

(iii) an equalization port communicating between the first hydraulic tube and the main flow passage;

(iv) a piston positioned in the first hydraulic tube between the equalization port and the manifold;

(v) a drive motor driving a bi-directional first hydraulic motor, the drive motor and the first hydraulic motor being positioned in the second hydraulic tube and the first hydraulic motor being configured to output fluid to a fluid outlet of the second hydraulic tube.

15. The subsurface safety valve of claim 14, wherein the safety valve and actuator assembly are positioned in a continuous tubular housing.

16. The subsurface safety valve of claim 14, wherein the safety valve and actuator assembly are positioned in separate subs.

17. A actuator sub for generating hydraulic pressure, the actuator sub comprising:

(a) a sub housing including (i) a main flow passage extending though the sub housing, and (ii) a component compartment radially offset from the main flow passage;

(b) a first and second hydraulic tube positioned in the component compartment to engage a manifold, where the manifold provides a fluid connection between the hydraulic tubes;

(c) an equalization port communicating between the first hydraulic tube and the main flow passage;

(d) a piston positioned in the first hydraulic tube between the equalization port and the manifold;

(e) an electric motor driving an open-flow hydraulic motor, the electric motor and the hydraulic motor being positioned in the second hydraulic tube and the hydraulic motor being in fluid communication with a fluid outlet of the second tube.

18. The subsurface safety valve of claim 1, wherein the component compartment is eccentrically located in the sub housing.

19. The subsurface safety valve of claim 1, wherein the open flow hydraulic motor is a bidirectional hydraulic motor.

20. An in-situ control system for a surface controlled subsurface safety valve consisting of:

(a) a fluid reservoir,

(b) a drive motor coupled to a hydraulic motor

(c) a power source

(d) a pressure compensating system wherein the fluid reservoir is kept substantially balanced to the hydrostatic pressure at the safety valve.

21. A control system as recited in claim 20 wherein the pressure compensation system communicates with the ID of the tubular above a closure mechanism in the safety valve.

22. A control system as recited in claim 20 wherein the pressure compensation system communicates with the ID of the tubular below a closure mechanism in the safety valve.

23. A control system as recited in claim 20 wherein the pressure compensation system communicates with an annular area around the safety valve.

24. A control system as recited in claim 20 wherein the system is located and operated in close proximity to the Safety Valve as a safety valve accessory

25. A control system as recited in claim 20 wherein the system is integral to the safety valve

26. A control system as recited in claim 20 wherein a spring forces hydraulic fluid back through the pump and into the reservoir allowing the safety valve to close.

27. A control system as recited in claim 20 where electrical power applied to the drive motor holds hydraulic pressure to maintain the open position on the safety valve

28. A control system as recited in claim 27 where loss of electrical power will allow the safety valve to close.

29. A control system as recited in claim 20 wherein the drive motor is an induction motor.

30. A control system as recited in claim 20 wherein the drive motor is a brush commutated motor.

31. A control system as recited in claim 20 wherein the drive motor is a permanent magnet motor.

32. A control system as recited in claim 31 wherein the drive motor is a permanent magnet motor with electronic commutation.

33. A control system as recited in claim 20 wherein the drive motor is a hydraulic motor.

34. A control system as recited in claim 20 wherein the safety valve is an insert wireline valve that has been installed after a lockout and communication of the tubing safety valve.

35. A control system as recited in claim 20 wherein the control system contains a feature that allows refilling of the fluid reservoir with an accessory deployed down the ID of tubing to which the safety valve is connected.

36. A control system as recited in claim 35 wherein reverse drive motor operation will refill the fluid reservoir from a secondary reservoir deployed down the ID of the tubing.

37. A subsurface safety valve comprising:

(a) a flapper moving between an open and closed state corresponding to the position of a flow tube;

(b) a return spring biasing the flow tube in a flapper closed state;

(c) a first activating piston engaging the flow tube, the first activing piston connected to a pump configured to direct pressurized fluid against the first activating piston;

(d) a second activating piston engaging the flow tube, the second activating piston connected to a fail-to-open valve configured to close when power is applied to the fail-to-open valve and to open when power is removed from the fail-to-open valve.

38. The safety valve according to claim 37, wherein the pump is a bi-directional hydraulic motor and a fluid reservoir supplies hydraulic fluid to both the fail-to-open valve and the bi-direction hydraulic motor.

39. The safety valve according to claim 38, further comprising a controller configured to perform the steps of (i) driving the bi-directional hydraulic motor until the first activating position has moved the flow tube to an open flapper state, (ii) after step (i), applying power to the fail-to-open valve in order to close the fail-to-open valve, and (iii) after step (ii), ceasing or substantially reducing operation of the bi-directional hydraulic motor.

40. The safety valve according to claim 38, wherein a piston in the fluid reservoir displaces fluid directed through the fail-to-close valve toward the second activating piston.

41. An actuator sub for generating hydraulic pressure, the actuator sub comprising:

(a) a sub housing including (i) an outer surface, (ii) a main flow passage extending though the sub housing, and (iii) a wall space formed between the main flow passage and the housing outer surface;

(b) a first and second hydraulic tube in the wall space engaging a manifold, where the manifold provides a fluid connection between the hydraulic tubes;

(c) an equalization port communicating between the first hydraulic tube and the main flow passage;

(d) a piston positioned in the first hydraulic tube between the equalization port and the manifold;

(e) a drive motor driving an bi-directional first hydraulic motor, (i) the drive motor and the first hydraulic motor being positioned in the second hydraulic tube, (ii) the first hydraulic motor being configured to output fluid to a fluid outlet of the second hydraulic tube, and (iii) the hydraulic motor, when not under power, allowing the reverse flow of fluid through the hydraulic motor; and

(f) wherein the actuator sub comprises the absence of a check valve along a path carrying fluid between the hydraulic motor and the outlet of the second hydraulic tube.

42. The actuator sub of claim 41, wherein the bi-directional hydraulic motor is a swashplate pump.

43. The actuator sub of claim 41, wherein a biasing mechanism biases the piston in a direction toward the manifold in a direction of fluid flow toward the manifold.

44. The actuator sub of claim 43, wherein the biasing mechanism is a spring.

45. The actuator sub of claim 43, wherein the second hydraulic tube is filled with a fluid moved by the hydraulic motor.

46. The actuator sub of claim 45, wherein a volume of the first tube above the piston is filled with the fluid and the biasing mechanism places a positive pressure on the fluid.

47. The actuator sub of claim 41, wherein the hydraulic tubes contain a dielectric fluid.

48. The actuator sub of claim 41, wherein the drive motor is an electric motor.

49. The actuator sub of claim 48, wherein the electric motor is connected to a power supply at the well surface.

50. The actuator sub of claim 41, wherein the drive motor is a second hydraulic motor powered by pressurized fluid circulated downhole by a surface pump.

51. The actuator sub of claim 41 , further comprising:

(a) a safety valve sub is connected proximate the actuator sub, the safety valve sub including a flow tube, return spring and flapper, wherein force on the flow tube compresses the return spring and holds the flapper in an open position; and

(b) a conduit connecting the fluid outlet of the actuator sub to a piston acting on the flow tube of the safety valve.

52. The actuator sub of either claim 1 or 41, wherein in the first and second hydraulic tubes are positioned in a side-by-side configuration.

53. The actuator sub of either claim 1 or 41, wherein in the first and second hydraulic tubes are positioned in an in-line configuration.

54. An actuator sub for generating hydraulic pressure, the actuator sub comprising:

(a) a sub housing including (i) an outer surface, (ii) a main flow passage extending though the sub housing, and (iii) a wall space formed between the main flow passage and the housing outer surface;

(b) at least a first hydraulic tube in the wall space;

(c) an equalization port configured to transmit pressure in the main flow passage to the first hydraulic tube;

(e) a drive motor driving an bi-directional hydraulic motor, (i) the drive motor and the hydraulic motor being positioned in the first hydraulic tube, (ii) the hydraulic motor being configured to output fluid to a fluid outlet of the first hydraulic tube, and (iii) the hydraulic motor, when not under power, allowing the reverse flow of fluid through the hydraulic motor; and

(f) wherein the actuator sub comprises the absence of a check valve along a path carrying fluid between the hydraulic motor and the outlet of the second hydraulic tube.

55. The actuator sub of claim 54, further comprising a second hydraulic tube and a manifold, where the manifold provides a fluid connection between the hydraulic tubes.

56. The actuator sub of claim 55, wherein a piston positioned in the second hydraulic tube between the equalization port and the manifold.

57. The actuator sub of claim 54, wherein the bi-directional hydraulic motor is a swashplate pump.

58. The actuator sub of claim 56, wherein a biasing mechanism biases the piston in a direction toward the manifold.

59. The actuator sub of claim 54, wherein the first hydraulic tube is filled with a fluid moved by the hydraulic motor.

60. The actuator sub of claim 54, wherein the drive motor is an electric motor.

61. A subsurface safety valve comprising:

(a) a flapper moved between an open and closed position by a flow tube;

(b) a return spring biasing the flow tube in a flapper closed position;

(c) an activating piston acting on the flow tube;

(d) an actuator assembly for generating hydraulic pressure on the activating piston, the actuator assembly comprising a hydraulic motor being positioned in a hydraulic tube, the hydraulic motor, when not under power, allowing the reverse flow of fluid through the hydraulic motor, and the absence of a check valve between the hydraulic motor and an outlet of the hydraulic tube.

62. The subsurface safety valve of claim 61, wherein the actuator assembly further comprises:

(i) an assembly housing including (1) an outer surface, (2) a main flow passage extending though the sub housing, and (3) a wall space formed between the main flow passage and the housing outer surface;

(ii) a first and second hydraulic tube in the wall space engaging a manifold, where the manifold provides a fluid connection between the hydraulic tubes;

(iii) an equalization port communicating between the first hydraulic tube and the main flow passage; and

(iv) a piston positioned in the first hydraulic tube between the equalization port and the manifold.