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Robert M Sorem, David M Eslinger, Bart V Thomeer: Straddle inflatable packer system. Dowell Schlumberger Incorporated, Stephen A Littlefield, November 8, 1994: US05361836 (64 worldwide citation)

A straddle inflatable packer system includes upper and lower packer assemblies each having an inner elastomer sleeve surrounded by expansible armor members. For well treating operations, the upper packer includes an external elastomer sleeve which covers a lower portion of its armor members, and the ...


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David M Eslinger, L Michael McKee, Robert M Sorem, Kevin L Case, Jean L Pessin: Inflation shape control system for inflatable packers. Dowell a division of Schlumber Technology Corporation, John E Vick Jr, February 25, 1997: US05605195 (51 worldwide citation)

An inflatable packer used in a well and having a mandrel carrying upper and lower heads, a normally retracted inflatable packer element including an inner elastomer bladder and an outer expansible armor or carcass, the ends of the packer element being anchored to respective heads, and in one embodim ...


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Robert M Sorem, David M Eslinger, Hubertus V Thomeer, Darrin Willauer, Sarmad Adnan: Well treating system with pressure readout at surface and method. Dowell Schlumberger Incorporated, Stephen A Littlefield, September 27, 1994: US05350018 (38 worldwide citation)

A well treating tool string run on coiled tubing and having packers to isolate a zone to be treated in response to operation of a selector valve, pressure and temperature transducers in the tool string and a telemetry system which samples the measurements made by the transducers, an electrical condu ...


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David M Eslinger, L Michael McKee, Robert M Sorem: Inflatable packer with bladder shape control. Dowell a division of Schlumberger Technology, John H Bouchard, April 16, 1996: US05507341 (30 worldwide citation)

An inflatable packer assembly used in well service work and having a mandrel that carries a normally retracted inflatable packer unit. The unit includes an inner elastomer bladder surrounded by a reinforcement. To control the shape of the unit during inflation and thereby prevent the formation of Z- ...


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Robert M Sorem, David M Eslinger: Inflatable packer with wide slat reinforcement. Dowell a division of Schlumberger Technology Corporation, John E Vick Jr, March 25, 1997: US05613555 (27 worldwide citation)

A slat-type inflatable packer includes a plurality of longitudinal metal slats on the exterior thereof which are partially overlapping to allow expansion of the packer element while providing a barrier against extrusion. In one embodiment each slat has narrow end portions and a wide central portion ...


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David M Eslinger, Robert M Sorem: Reinforcing slat for inflatable packer. Dowell Schlumberger Incorporated, Henry N Garrana, Stephen A Littlefield, August 8, 1995: US05439053 (19 worldwide citation)

A reinforcing slat for use in an inflatable packer which is elongate and curved about its longitudinal axis and comprises perforations in the part thereof which enters the end portion and which bends around the end portion on inflation of the packer. The perforations serve to reduce the bending stif ...


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David M Eslinger, Robert M Sorem: Sealing element for inflatable packer. Dowell Schlumberger, Stephen A Littlefield, January 25, 1994: US05280824 (15 worldwide citation)

The outer, sealing cover of an inflatable packer comprises an alternating series of thick and thin annular portions which act to effect greater sealing stresses and to inhibit the propagation of cracks or tears in the elastomeric cover. Bonding with only portions of the underlying slats as well as a ...


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Robert M Sorem, David M Eslinger: Pre-formed stress rings for inflatable packers. Dowell Schlumberger Incorporated, Stephen A Littlefield, April 11, 1995: US05404947 (12 worldwide citation)

An inflatable packer apparatus for use in a well bore has pre-formed metal stress rings surrounding the respective opposite end portions of the packer element. The stress rings are machined to initially have conical outer surfaces, and then are outwardly stressed beyond their yield strengths to obta ...


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David M Eslinger, Robert M Sorem: Inflatable packer inner bladder retention and seal. Dowell Schlumberger Incorporated, Littlefield, February 21, 1995: US05390738 (8 worldwide citation)

Bladder retention for an inflatable packer includes a tubular base and a retainer member. Retainer teeth are provided on both the tubular base and the retainer member to retain the bladder against the axial loads of inflation. Separate sealing ribs are provided on at least one of the tubular base an ...