Pressure actuated safety valve

Claim 2

A pressure actuated subsurface safety valve for controlling the flow through a well conduit comprising, a valve having a valve element and a valve seat and positioned in the bore of the conduit, a first sliding sleeve positioned below said valve for controlling the actuation of the valve seat, yieldable urging means acting on the first sleeve biasing the sleeve upwardly for holding the valve element in the open position, piston means connected to the first sleeve and exposed to the pressure in the conduit bore below the valve for moving the sleeve downwardLy upon increase in the bore pressure for causing the valve element to close, a resetting second sliding sleeve positioned above the valve for opening the valve after the valve has closed by actuation of the first sleeve, second piston means connected to the second sleeve and exposed to pressure in the conduit above the valve, said second sleeve positioned for engaging the valve element and opening the valve by conduit pressure above the valve, and said first and second sleeves being longitudinally aligned for engagement with each other when the valve element is opened.

Claim 3

A pressure actuated subsurface safety valve for controlling the flow through a well conduit comprising, a valve having a valve body and bore therethrough, a first sliding sleeve positioned below said valve, the upper end of which when extended into the valve holds the valve in the open position and when the upper end is retracted away from the valve allows the valve to close, yieldable urging means acting on the first sleeve in a direction to urge the first sleeve upwardly, piston means connected to the first sleeve and exposed to the pressure in the conduit in a direction to move the sleeve away from the valve, resetting means for opening the valve positioned above the valve having a second sliding sleeve and a movable body with a lost motion connection between the second sliding sleeve and movable body, said first and second sleeves being positioned for engagement with each other, movable bore closure means connected to the movable body, said bore closure means being held out of the bore by the second sliding sleeve when the first sliding sleeve is in the extended position and holds the second sliding sleeve retracted, but said closure means allowed to close the bore when the first sleeve moves to a retracted position allowing the second sleeve to move and release the closure means thereby allowing the valve to be reset by increasing pressure in the bore above the closure means.

Claim 4

A pressure actuated subsurface safety valve for controlling the flow through a well conduit comprising, a valve having a valve body and bore therethrough, a first sliding sleeve positioned below said valve, the upper end of which when extended into the valve holds the valve in the open position and when the upper end is retracted away from the valve allows the valve to close, yieldable urging means acting on the first sleeve in a direction to urge the first sleeve upwardly, piston means connected to the first sleeve and exposed to the pressure in the conduit in a direction to move the sleeve away from the valve, resetting means for opening the valve positioned above the valve having a second sliding sleeve and a movable body with a lost motion connection between the second sliding sleeve and movable body, said first and second sleeves being positioned for engagement with each other, movable bore closure means connected to the movable body, said bore closure means being held out of the bore by the second sliding sleeve when the first sliding sleeve is in the extended position and holds the second sliding sleeve retracted, but said closure means allowed to close the bore when the first sleeve moves to a retracted position allowing the second sleeve to move and release the closure means thereby allowing the valve to be reset by increasing pressure in the bore above the closure means.

Claim 5

The apparatus of claim 2 including, detent means between the movable body and the valve body for releasably holding the movable body in a retracted and an extended position until moved by the second sliding sleeve.

Claim 6

A pressure actuated resettable subsurface safety valve for controlling the flow through a well conduit comprising, a valve having a valve body and a bore, a first sliding tubular sleeve positioned below said valve, the upper end of which when extended into the valve holds the valve in the open position and when the upper end is retracted away from the valve allows the valve to close, yieldable urging means acting on the first sleeve in a direction to urge the first sleeve extended upwardly, piston means connected to the first sleeve and exposed to the pressure in the conduit in a direction to retract the first sleeve downwardly, resetting means positioned above the valve for opening the valve and having a second sliding tubular sleeve and a movable body with a lost motion connection between the second sleeve and the movable body, said first and second sleeve being axially aligned for engagement with each other, movable bore closure means connected to the movable body and movable into and out of the bore, said closure means being held out of the bore by the second sliding sleeve when the first sliding sleeve is in the extended position and holds the second sliding sleeve retracted, said closure means allowed to close the bore to form a piston therein when the first sleeve moves to a retracted position allowing the second sleeve to move and release the closure means whereby the valve may be reset by increasing pressure in the bore above the closed closure means.

Claim 7

A pressure actuated resettable subsurface safety valve for controlling the flow through a well conduit comprising, a valve having a valve body and a bore, a first sliding tubular sleeve positioned below said valve, the upper end of which when extended into the valve holds the valve in the open position and when the upper end is retracted away from the valve allows the valve to close, yieldable urging means acting on the first sleeve in a direction to urge the first sleeve extended upwardly, piston means connected to the first sleeve and exposed to the pressure in the conduit in a direction to retract the first sleeve downwardly, resetting means positioned above the valve for opening the valve and having a second sliding tubular sleeve and a movable body with a lost motion connection between the second sleeve and the movable body, said first and second sleeve being axially aligned for engagement with each other, movable bore closure means connected to the movable body and movable into and out of the bore, said closure means being held out of the bore by the second sliding sleeve when the first sliding sleeve is in the extended position and holds the second sliding sleeve retracted, said closure means allowed to close the bore to form a piston therein when the first sleeve moves to a retracted position allowing the second sleeve to move and release the closure means whereby the valve may be reset by increasing pressure in the bore above the closed closure means.

Claim 8

The apparatus of claim 4 including, detent means between the movable body and the valve body for releasably holding the movable body in a retracted and an extended position.

Claim 9

The apparatus of claim 4 including, spring means between the second tubular sleeVe and the movable body.

Claim 10

The apparatus of claim 4 wherein the first and second sleeves are in engagement with each other when the valve is open and conduct flowing well fluid through the valve for isolating the well fluid from other valve components.