Baker International Inc.

Amareswar Amancharla

Clifford H Beall

Michael A Luke

A seal receptacle assembly is provided for affixation on a well conduit. The seal receptacle assembly can be provided to permit telescopic contraction and expansion of the well conduit in response to heating, cooling, or pressurization of the well conduit. The seal receptacle assembly includes an inner body sleeve having a lower end connected to the well tool or a conduit member, and an annular sealing element positioned over an outer cylindrical static sealing surface formed on the inner body sleeve. An outer housing having one end connected to the well conduit telescopes over the upper portion of the inner body sleeve. The housing has an inner cylindrical dynamic sealing surface for sealingly and slidably engaging the sealing element. Means, such as a radially compressible retaining ring, are mounted in an outer groove formed on the inner body sleeve above the sealing element, or, alternatively, a collet is provided, for maintaining the sealing element on the static sealing surface during normal expansion and contraction of the seal receptacle assembly. Upward movement of the outer housing causes the retaining ring, or collet, to expand outwardly into an inner groove in the housing and permit the housing to lift the sealing element off the static sealing surface. The sealing element and the dynamic sealing surface can then be removed from the well in a single retrieval operation.

Seal receptacle assembly

An apparatus is provided for injecting fluid within the bore of a subterranean well. The fluid is transmitted through the bore above the apparatus through parallel fluid flow conduits. A packer assembly communicates to the fluid flow conduits and is carriable on at least one of the conduits. Concentric flow means are defined through the packer assembly for transmission of fluid and communicate with the fluid flow conduits and a production zone within the well. Receptacle means are carried on the packer assembly and communicate between the fluid flow conduits and the concentric flow means. Casing gripping means which are fluid pressure responsive are defined around the packer assembly and are responsive to each of predeterminable pressure increase from fluid flow from the top of the well within one of the fluid flow conduits and within the well below the packer assembly, whereby the gripping means are urged to gripping engagement with the casing to prevent movement of the apparatus in one direction.

Subterranean well injection apparatus

A seal system is provided with a series of annular seal assemblies separated by relatively rigid spacing members and may be preferably adapted to selectively sealing engage a packer apparatus within a well bore conduit, during the completion or workover of a subterranean oil or gas well. Preferably, each seal assembly comprises four annular seal members in sequence. The outermost seal members are formed from a thermoplastic polymer having a coefficient of expansion greater than that of the rigid spacing members and the conduit, with physical resistance to corrosive chemicals and high temperature and pressure environments. The outermost member has a physical hardness sufficient to withstand extrusion into a gap defined between the rigid spacing member and the conduit by pressure transmitted from the rigid spacing member. One of the inner seal members is a flexible perfluoro polymer with enhanced permanent set and cold flow. The second of the inner seal members is an elastomer derived from the copolymerization of tetrafluoroethylene and perfluoroethers.

Conduit sealing system

A wireline releasable sealing connector is connected in a tubular pipe string together with a packer which is adapted to be set in the well casing. The connector is releasable and connectable without rotation of the pipestring. Tension is transmitted through the connector by a latching collet which is locked against release in response to relative longitudinal movement between an outer body and an inner sealing mandrel, unless, while the connector is in compression, a wireline tool is seated within the connector and engages a connector collet and thereby prevents locking of the latching collet.

Wireline releasable seal connector for wellpipe strings

A well tool assembly is provided which is adapted to be set within a well bore. The assembly comprises a main body having a main passage. Means on the main body are provided for securing the main body within the well bore. An expendable plug is provided and housed within the passage to prevent flow of fluid therethrough. The plug assembly comprises a top sub, a longitudinally extending mandrel and piston means. First disengaging means are provided for selectively securing the top sub to the piston means or the mandrel. Second disengaging means are provided for selectively securing the top sub to the other of the piston means and the mandrel. Seal means are located on the plug assembly for prevention of fluid transmission thereacross. First and second no-go elements on at least one of the main body and the expendable plug are operational with third disengaging means which, in turn, are initially housed within the main body and between the no-go means, and initially secured to at least one of the piston means and the mandrel, the no-go means resisting upper and lower longitudinal movement of the third disengaging means.

Expendable plug and packer assembly

An apparatus is provided for selective mechanically activated latching and fluid activated locking and unlocking of a tubular string within an anchor assembly in a subterranean bore, wherein the anchor assembly has defined thereon co-engaging elements for selectively latching and locking of a tubular string with the anchor assembly. The apparatus comprises a housing which contains second co-engaging means which are complimentarily operational with the first co-engaging means. A longitudinally shiftable sleeve is initially secured to at least one of the housing and the second co-engaging means and is initially positioned with respect to the second co-engaging means whereby the second co-engaging means is selectively and repeatably latchable with respect to the first co-engaging means. A first seat is provided within said shiftable sleeve for sealing receipt of a first sealing element whereby the sleeve is converted to a fluid responsive piston for longitudinal shifting of the sleeve or the second co-engaging means relative to the other of the sleeve and the co-engaging means to a first position whereby the first relative shifting to the first position locks the second co-engaging means with the first co-engaging means. Second seat means for sealing receipt of a second sealing element is provided whereby the sleeve means is again converted to a piston to longitudinally shift either the sleeve means or the co-engaging means relative to the other of the sleeve means and the co-engaging means to a second position to unlock the first and second co-engaging means.

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League City, TX, United States of America

Amareswar Amancharla