Halliburton Energy Services, Inc.

Other

Otis Engineering Corporation

Glenn Ray Davis

James Dan Vick, Jr

Jimmie Robert Williamson

Stuart Morton Dennistoun

Bruce Edward Scott

Rennie L Dickson

Leo Guadalupe Collins

James Michael Souza

Robert Arthur Rademaker

Kwok-Ping Wong

Billy H Davidson

Wellbore systems containing a hydraulically regulated primary safety valve may have their hydraulic regulation transferred to an insert safety valve disposed in a nipple. Transfer of the hydraulic regulation may take place mechanically, such as through axial displacement of a sliding sleeve or by replacement of a hydraulic spool. Wellbore systems configured for axial displacement of a switching mechanism may comprise: a tubing string comprising a nipple and a primary safety valve, the primary safety valve being disposed in the tubing string above or below the nipple; a control line and a balance line in hydraulic communication with the primary safety valve and in latent hydraulic communication with an internal flow pathway within the nipple; and a switching mechanism that is axially displaceable to establish hydraulic communication between an insert safety valve positioned in a bore of the nipple and both the control line and the balance line.

Mechanisms for transferring hydraulic regulation from a primary safety valve to a secondary safety valve

Certain aspects of the present disclosure are directed to tools actuated by pipe swell. A downhole assembly for a wellbore may be provided. The downhole assembly can include a first sleeve and a second sleeve. The first sleeve can expand from a first position to a second position in response to a first pressure applied to the first sleeve. The first sleeve can contract to the first position in response to a cessation of the first pressure. The second sleeve can be positioned adjacent to the first sleeve to define a swell chamber. The swell chamber can actuate a downhole tool by a pressure stored in the swell chamber by the expansion of the first sleeve.

Pipe swell powered tool

A safety valve having a mono spring closure mechanism. The closure mechanism may be free of any spiral wound spring. The closure mechanism may include a spring having a beam which bends along its length to apply a biasing force to the closure member at its fully closed position and at its fully open position. The closure mechanism may include only a single spring, with the spring having at least two legs, the legs being joined to each other at an end of each leg, and each leg including at least one beam.

Safety valve having mono spring closure mechanism

A composite structural reinforcement device to be applied to structural members by wrapping in successive overlying layers includes a body formed of a first ply of resin impregnated high tensile strength material, a second ply of resin impregnated high tensile strength material, a magnetically detectable ply disposed and bonded between the first and second plies, an interlock means for mechanically interlocking successive layers as the device is applied to a structural member, and an alignment means for aligning successive layers of the device in overlying relation. Various alternative embodiments and various combinations of features are disclosed.

Composite structural reinforcement device

A valve ( ) for controlling fluid flow therethrough in downhole applications is disclosed. The valve ( ) comprises a valve housing having a valve closure mechanism ( ) and a valve seat ( ) disposed therein. The valve closure mechanism ( ) has sealing surface ( ) and a secondary load bearing surface ( ). The valve seat ( ) has a valve seat sealing surface ( ) that mates with the sealing surface ( ) of the valve closure mechanism ( ). The secondary load bearing surface ( ) of the valve closure mechanism ( ) mates with a valve secondary load bearing surface ( ) which may be supported by the valve seat ( ).

Valve with secondary load bearing surface

A valve (,) for controlling fluid flow therethrough in downhole applications is disclosed. The valve (,) comprises a valve housing having a valve closure mechanism (,) and a valve seat (,) disposed therein. The valve closure mechanism (,) has sealing surface (,) and a secondary load bearing surface (,). The valve seat (,) has a valve seat sealing surface (,) that mates with the sealing surface (,) of the valve closure mechanism (,). The secondary load bearing surface (,) of the valve closure mechanism (,) mates with a valve secondary load bearing surface (,) which may be supported by the valve seat (,).

An improved lockout housing (48) and lockout sleeve (46) for a tubing retrievable safety valve (36) having cooperating lugs and lug recesses that are adapted to reduce the likelihood of premature shearing or leaking. Sets of circumferentially spaced, shearable retaining lugs (64) are alternated with sets of circumferentially spaced, shearable communicating lugs (54) that extend radially inward around the upper portion of lockout housing (48) and are preferably unitarily formed as an integral part of the lockout housing (48). First and second sets of longitudinally extending slots (62, 66) are likewise circumferentially spaced around the lower end of outside wall (68) of lockout sleeve (46), and are adapted to slidably engage the longitudinally aligned lugs (54, 64) of the lockout housing. Slots (62) aligned longitudinally with communicating lugs (54) are preferably longer than slots (66) aligned with the retaining lugs (64), and extend a greater distance up outside wall (68) of lockout sleeve (46). Retaining lugs (64) of lockout housing (48) retain lockout sleeve (46) in its upper position relative to lockout housing (48), and shoulders (56) of slots (62) aligned with communicating lugs (54) do not contact communicating lugs (54) of lockout housing (48) until retaining lugs (64) are sheared.

Lockout housing and sleeve for safety valve

Two embodiments of a wireline blowout preventer are disclosed. The rams in each embodiment are keyed to end bodies which close the outer ends of body cross bores for the rams. One blowout preventer embodiment utilizes cross pins having flat surfaces positioned in each end body. The pin flat surfaces slidably engage flat surfaces on a sleeve connected and keyed to each ram to key rams to end bodies. The other embodiment keys the rams to the end bodies with a square sleeve connected and keyed to each ram. Each square sleeve is moveable through square hole in the end body. The end bodies may be positioned inverted, inverting the rams to prevent flow downwardly through the blowout preventer when the rams are in closed position.

Manual blowout preventer with invertible rams

Shorts adapted for use by patients in hospitals, clinics and physicians' offices. A pair of shorts are provided having a front portion (12) and rear portion (14) joined together at a crotch (20) and including a waistband (16) and identical leg portions (18) extending from the crotch substantially above the patient's knees. The rear portion contains an elongated opening (22) extending from below the waistband to above the crotch. A flap (24) secured at its lower end to the rear portion just below the opening contains a fastener (30) at the opposite end of the flap adapted to be removably fastened to a fastener (32) disposed on the rear portion above the opening whereby the flap covers the opening and can be unfastened to provide access to the patient's anal area.

Hospital shorts

A packing nut which when retrofitted to or assembled into a stuffing box and hydraulically or manually actuated applies force to packing in the stuffing box, compressing the packing to seal on stationary wireline or pump rods or to wipe or seal on moving wireline or rods passing through a hole in a piston rod on which there is an operating piston in the packing nut body. The piston rod may be rotated to adjust its length for packing contact, and desired packing compression may be maintained by further rod rotation if pressured fluid is not available for hydraulic actuation. A connection for a remotely pressured fluid conduit is provided on the packing nut housing to deliver actuating fluid to the operating piston.

Growing community of inventors

Euless, TX, United States of America

Glenn Ray Davis