摘要:
A variable inside diameter blowout preventer capable of sealing off a bore or around an object against high well pressures, and which may be either in a ram-type preventer or an annular preventer, and wherein a plurality of anti-extrusion members are disposed for radial movement on a curved plate, either semicylindrical or annular, and so that the adjacent anti-extrusion members overlap each other from the plate radially inwardly, and the anti-extrusion members are movable as a ring or semi-circle of varying inner radius to limit or prevent extrusion of a resilient sealing member therewith when sealing with the external surface of a pipe or other object in a well bore.
摘要:
A well tool adapted for connection in a production tubing including a separable flow housing having a bore extending therethrough and a rotatable ball bore closure means positioned in said bore which is operable for blocking undesired flow through the production tubing at a subsurface location and a releasable securing means for enabling separation of the flow housing when desired to enable retrieval of the rotatable ball means while leaving a portion of the housing in the well. The well tool includes means for sealing with a well casing adjacent the tool wherein the differential annular pressure urging established across the seal effects rotation of the ball bore closure and a means for mounting the tool with the well casing for supporting the well tool in the well. The rotatable ball may be releasably locked in the open position by the urging of a directional fluid pressure.
摘要:
A full bore opening valve operator apparatus adapted for mounting with a flow tubing to releasably receive a flow controlling valve means movable through the bore of the tubing for operably securing with the apparatus for remotely-controlled operation of the valve means by either a first or second control means to control the flow through the bore.
摘要:
An encapsulated fluid control line includes a plurality of control tubes which are encapsulated in the preferred embodiment, in an elastomeric material.
摘要:
A completion and kill valve adapted to be placed immediately above a packer in the well production tubing including a tubular member having an inner bore and a circulation channel therein permitting communication between the inner bore and the well annulus area adjacent the exterior of the tubular member. A movable sleeve closes or opens communication through the circulation channel in response to various pressures and a spring bias acting on the sleeve. Provisions for locking the sleeve in the open position and subsequently unlocking the sleeve in response to inner bore pressure are provided.
摘要:
A completion and kill valve adapted to be placed immediately above a packer in the well production tubing including a tubular member having an inner bore and a circulation channel therein permitting communication between the inner bore and the well annulus area adjacent the exterior of the tubular member. A movable sleeve closes or opens communication through the circulation channel in response to various pressures and a spring bias acting on the sleeve. Provisions for locking the sleeve in the open position and subsequently unlocking the sleeve in response to inner bore pressure are provided.
摘要:
Apparatus for removing and replacing blowout preventer ram seals without removing the rams or opening the blowout preventers, wherein means are lowered in a well pipe for removing one or both of the retrievable ram seals from the rams by working on the inside of the well pipe, and wherein additional means are provided for inserting from inside of the well pipe one or more of the retrievable ram seals as a replacement for the one or more seals removed, such means being preferably on a single tool but being usable on several separate tools.
摘要:
Subsurface well apparatus and method of operating same, wherein a controlled ball valve or closure means is provided, with means for mounting same in a well tubing for normally opening and closing flow through the well tubing, and wherein a fluid flow control assembly having a replacement ball valve therewith is adapted to be dropped in or otherwise lowered through the well tubing so as to position same above said controlled ball valve for subsequent operation of said replacement valve to thereafter serve as a replacement for said controlled valve.
摘要:
The invention concerns coupling of a control pressure line to larger diameter well tubing, as by a coupling comprising: A. A C-shaped metallic retainer body adapted for lateral connection about the tubing, B. SAID BODY FORMING A LONGITUDINALLY EXTENDING RECESS, C. ELASTOMER MEANS AT THE INNER SIDE OF THE RETAINER BODY FOR RECEPTION IN SAID RECESS TO BE COMPRESSED BETWEEN THE BODY AND THE LINE IN RESPONSE TO SAID LATERAL CONNECTION OF THE RETAINER BODY ABOUT THE TUBING.
摘要:
A selective calling system incorporating a master station and multiple remote stations includes a means for generating the desired remote station address and properly constituted message at the master station, and a means for generating properly constituted response at the remote station. The response from the remote station is generated in a unique and new way and processed at the master station in a unique and new way, such that the validity of the responding remote station''s address may be verified without the necessity of including the remote station''s address as part of the return message.