Deep set safety valve
First Claim
Patent Images
1. A method of actuating a safety valve, the method comprising the steps of:
- displacing an actuator member of the safety valve;
translating displacement of the actuator member to displacement of an operating member, the translation being performed across a pressure isolation barrier without use of any dynamic seal;
preventing flow longitudinally through the pressure isolation barrier when the operating member is in a closed position; and
permitting flow longitudinally through the pressure isolation barrier when the operating member is in an open position.
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Abstract
Apparatus and methods are provided for actuation of downhole tools. In one example, a deep set safety valve uses a magnetic coupling which permits a portion of the safety valve at control line pressure to be isolated from tubing string internal pressure, without requiring the use of a dynamic seal therebetween. A piston of the safety valve may be displaced in response to a differential between control line pressure and pressure in an annulus surrounding the tubing string, pressure in another control line, or pressure in the tubing string. Other types of well tools may benefit from actuation using principles of the invention.
73 Citations
116 Claims
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1. A method of actuating a safety valve, the method comprising the steps of:
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displacing an actuator member of the safety valve; translating displacement of the actuator member to displacement of an operating member, the translation being performed across a pressure isolation barrier without use of any dynamic seal; preventing flow longitudinally through the pressure isolation barrier when the operating member is in a closed position; and permitting flow longitudinally through the pressure isolation barrier when the operating member is in an open position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A safety valve, comprising:
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an actuator including a piston which displaces in response to a first pressure applied to the piston; an operating member which displaces to operate the safety valve, the operating member having a second pressure applied thereto; and a pressure isolation barrier which also serves as a flow conduit when the safety valve is open, wherein displacement of the piston is translated into displacement of the operating member while the first and second pressures are isolated from each other by the pressure isolation barrier, without the use of any dynamic seal isolating the first pressure from the second pressure. - View Dependent Claims (12, 13, 14)
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15. A safety valve, comprising:
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an actuator including a piston which displaces in response to a first pressure applied to the piston; an operating member which displaces to operate the safety valve, the operating member having a second pressure applied thereto; and displacement of the piston being translated into displacement of the operating member while the first and second pressures are isolated from each other, without the use of any dynamic seal isolating the first pressure from the second pressure, wherein the first pressure is pressure in a first line connected to the actuator, and wherein a third pressure is applied to the piston, and wherein the piston displaces in response to a differential between the first and third pressures. - View Dependent Claims (16, 17, 18)
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19. A method of actuating a well tool in a well, the method comprising the steps of:
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displacing an actuator member of the well tool, the well tool having a flow passage for flow of fluid therethrough; translating displacement of the actuator member to displacement of an operating member by use of a magnetic coupling therebetween; and actuating the well tool in response to displacement of the operating member in both a first direction and a second direction opposite to the first direction. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of actuating a safety valve, the method comprising the steps of:
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displacing an actuator member of the safety valve; translating displacement of the actuator member to displacement of an operating member, the translation being performed across a pressure isolation barrier without use of any dynamic seal; and actuating the safety valve between open and closed positions in response to displacement of the operating member, wherein in the open position flow is permitted longitudinally through the pressure isolation barrier. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A well tool, comprising:
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a flow passage for flow of fluid therethrough; an actuator for displacing an actuator member of the well tool; an operating member which is displaced to operate the well tool, the well tool being operable in response to displacement of the operating member both in a first direction and in a second direction opposite to the first direction; and a magnetic coupling between the actuator member and the operating member. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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60. A safety valve, comprising:
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an actuator having an actuator member; an operating member which is displaced to operate the safety valve; a magnetic coupling between the actuator member and the operating member, wherein the magnetic coupling translates displacement of the actuator member into operating member displacement to thereby operate the safety valve; and a pressure isolation barrier which isolates pressure on the actuator member from pressure on the operating member, the pressure isolation barrier also serving as a conduit for flow through the operating member when the safety valve is open.
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61. A method of completing a well, the method comprising the steps of:
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positioning a well tool in the well; displacing an actuator member of the well tool; and translating displacement of the actuator member to displacement of an operating member of the well tool, the translation being performed across a pressure isolation barrier without use of any dynamic seal, and the translation occurring while a pressure differential exists across the pressure isolation barrier. - View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69, 70)
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71. A method of installing a tubular string in a well, the method comprising the steps of:
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interconnecting in the tubular string a well tool including an actuator member; positioning the tubular string in the well; extending a control line along the tubular string in the well, the control line being in fluid communication with the actuator member; and translating displacement of the actuator member to displacement of an operating member of the well tool, the translation being performed across a pressure isolation barrier without use of any dynamic seal. - View Dependent Claims (72, 73, 74, 75, 76, 77, 78, 79, 80, 81)
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82. A completion string for use in a well, the completion string comprising:
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a well tool interconnected in the completion string, the well tool including an actuator member and an operating member, displacement of the actuator member being translatable into displacement of the operating member across a pressure barrier without use of any dynamic seal; and a control line extending along the completion string and in fluid communication with the actuator member, so that pressure in the control line controls displacement of the actuator member. - View Dependent Claims (83, 84, 85, 86, 87, 88, 89, 90, 91, 92)
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93. A well tool, comprising:
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a flow passage for flow of fluid through the well tool; an actuator including a piston which is isolated from fluid communication with the flow passage; and an operating member, the piston being operable to apply a force to the operating member across a pressure isolation barrier without use of any dynamic seal. - View Dependent Claims (94, 95, 96, 97, 98)
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99. A method of actuating a well tool in a well, the method comprising the steps of:
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positioning the well tool in the well, the well tool including a flow passage for flow of fluid therethrough, a piston, and an operating member; and actuating the well tool by applying force from the piston to the operating member across a pressure isolation barrier without use of any dynamic seal, the piston being isolated from the flow passage during the actuating step. - View Dependent Claims (100, 101, 102, 103, 104)
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105. A well tool, comprising:
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an actuator member; and an operating member positioned internal to the actuator member, the actuator member being operable to apply a force to the operating member across a pressure isolation barrier without use of any dynamic seal. - View Dependent Claims (106, 107, 108, 109, 110)
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111. A method of actuating a well tool in a well, the method comprising the steps of:
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positioning the well tool in the well, the well tool including an actuator member, and an operating member, with the operating member being positioned internal to the actuator member; and actuating the well tool by applying force from the actuator member to the operating member across a pressure isolation barrier without use of any dynamic seal. - View Dependent Claims (112, 113, 114, 115, 116)
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Specification