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公开(公告)号：US1889866A
公开(公告)日：1932-12-06
申请号：US37335529
申请日：1929-06-24
IPC分类号： E21B17/042 , E21B17/10 , F16L15/04 , F16L15/08
CPC分类号： F16L15/001 , E21B17/1042 , F16L15/08
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公开(公告)号：US1189428A
公开(公告)日：1916-07-04
申请号：US8436816
申请日：1916-03-15
申请人： CATER WILLIAM H
发明人： CATER WILLIAM H
CPC分类号： E21B17/1042 , Y10T24/39
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公开(公告)号：US696749A
公开(公告)日：1902-04-01
申请号：US1901075036
申请日：1901-09-11
申请人： RIGBY CLARK F
发明人： RIGBY CLARK F
CPC分类号： E21B17/1042 , Y10S415/901 , Y10T16/37
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公开(公告)号：US10077616B2
公开(公告)日：2018-09-18
申请号：US14530461
申请日：2014-10-31
CPC分类号： E21B17/1071 , E21B17/10 , E21B17/1042 , E21B33/08 , E21B33/10 , E21B43/126 , F04B47/00 , F04B47/02 , Y10T137/794
摘要： A tubing pump includes a seal housing insertable into a production string of tubing with a seal assembly mounted in an interior of the seal housing. The assembly includes at least an upper seal and seal holder and a lower seal and seal holder, each seal energizable by fluid to provide a fluid-tight seal around a reciprocating tubular member. The seals and holders are isolated from each other in a manner whereby the lower seal remains un-energized until the seal above it fails.
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公开(公告)号：US10000985B2
公开(公告)日：2018-06-19
申请号：US14767551
申请日：2013-04-08
CPC分类号： E21B23/14 , E21B17/1042 , E21B17/1085 , E21B31/00
摘要： A slip cover for downhole logging tools to prevent the tools from becoming lodged during extraction and a method of retrieving a lodged logging tool in a wellbore are disclosed. In some implementations, the slip cover may include a generally cylindrical polymeric sleeve having an inside diameter greater than an outside diameter of a generally cylindrical well logging tool to which the sleeve is to be applied and having one or more perforations disposed therein.
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公开(公告)号：US09926754B2
公开(公告)日：2018-03-27
申请号：US14681818
申请日：2015-04-08
CPC分类号： E21B19/22 , E21B17/1042 , E21B17/1071
摘要： A polymeric rod guide for a sucker rod, said polymeric rod guide having a body surrounding and coaxial with the sucker rod and molded in fixed contact with the rod. The body having a polygonal cross-section and a plurality of blades longitudinally disposed and extending from the body, each blade having a pair of planar longitudinal side walls and an exterior longitudinal edge, each of said blades having a first blade face disposed between a first terminal end of the blade and the exterior longitudinal edge and a second blade face disposed between a second terminal end of the blade and the exterior longitudinal edge, and an area of the body between the longitudinal side wall of a first blade and the longitudinal side wall of an adjacent second blade defines a trough having a plurality of planar surfaces.
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公开(公告)号：US20180038172A1
公开(公告)日：2018-02-08
申请号：US15670327
申请日：2017-08-07
CPC分类号： E21B17/1078 , E21B17/1042 , E21B23/02
摘要： The invention provides a centralizer for use with downhole operations. The centralizer is formed of a hollow, cylindrical body having an exposed outer surface and formed of a non-metallic material, a plurality of non-metallic blades protruding from the outer surface of the cylindrical body, and a plurality of wear buttons positioned on each of the plurality of blades, each of the wear buttons having a surface designed to reduce grabbing or sticking and wear of the hollow cylindrical body, such as a smooth, oval surface.
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公开(公告)号：US09840880B2
公开(公告)日：2017-12-12
申请号：US15243749
申请日：2016-08-22
CPC分类号： E21B17/1078 , E21B17/10 , E21B17/1042 , E21B19/24
摘要： A casing centralizer comprising a cylindrical base and a plurality of blades extending from the cylindrical base. The plurality of blades and the cylindrical base are compression molded as a single piece from a mineral filled, glass and specialty fiber reinforced polyester molding compound.
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