Assignee
WKM WELLHEAD SYSTEMS
32 granted patents·832 citations·filing 1975–1982
Top patents by PatentIndex Score
32 records- 0187US4215746APressure responsive safety system for fluid linesWKM WELLHEAD SYSTEMS·Filed 1979·Granted Aug 5, 1980·66 cites·28 claims
- 0282US4184504AWellhead valve removal and installation toolWKM WELLHEAD SYSTEMS·Filed 1977·Granted Jan 22, 1980·58 cites·19 claims
- 0378US4268283AFluid control means for geothermal wellsWKM WELLHEAD SYSTEMS·Filed 1979·Granted May 19, 1981·42 cites·6 claims
- 0477US4278278AMeans for tensioning tubing in a wellhead assemblyWKM WELLHEAD SYSTEMS·Filed 1979·Granted Jul 14, 1981·55 cites·7 claims
- 0575US4010770AVelocity flow control valve for fluid lineWKM WELLHEAD SYSTEMS·Filed 1976·Granted Mar 8, 1977·25 cites·5 claims
- 0674US4460039AWellhead valve removal and installation toolWKM WELLHEAD SYSTEMS·Filed 1982·Granted Jul 17, 1984·47 cites·9 claims
- 0774US4209040ASeal means for high pressure control valvesWKM WELLHEAD SYSTEMS·Filed 1978·Granted Jun 24, 1980·24 cites·1 claims
- 0872US4217934APilot valve mechanism for high or low pressure cut-off controlWKM WELLHEAD SYSTEMS·Filed 1979·Granted Aug 19, 1980·25 cites·5 claims
- 0971US4353560AMetal seal assembly with deformable sealing ringWKM WELLHEAD SYSTEMS·Filed 1981·Granted Oct 12, 1982·48 cites·6 claims
- 1071US4139059AWell casing hanger assemblyWKM WELLHEAD SYSTEMS·Filed 1977·Granted Feb 13, 1979·37 cites·8 claims
- 1169US4263938ARelay valve for fluid actuatorsWKM WELLHEAD SYSTEMS·Filed 1980·Granted Apr 28, 1981·23 cites·11 claims
- 1268US4384730ASeal assemblyWKM WELLHEAD SYSTEMS·Filed 1981·Granted May 24, 1983·36 cites·3 claims
- 1368US4225325ASteam separator with variably sized rectangular inlet openingWKM WELLHEAD SYSTEMS·Filed 1979·Granted Sep 30, 1980·19 cites·13 claims
- 1465US4202410ASeal testing arrangement for wellheadsWKM WELLHEAD SYSTEMS·Filed 1979·Granted May 13, 1980·38 cites·11 claims
- 1563US4291768APacking assembly for wellheadsWKM WELLHEAD SYSTEMS·Filed 1980·Granted Sep 29, 1981·29 cites·8 claims
- 1661US4263025ABaffle plate for cyclone steam separatorWKM WELLHEAD SYSTEMS·Filed 1979·Granted Apr 21, 1981·18 cites·5 claims
- 1761US4252145AManually reset control valve for a fluid actuatorWKM WELLHEAD SYSTEMS·Filed 1979·Granted Feb 24, 1981·15 cites·10 claims
- 1860US4214778AHolddown mechanism for a tubing hanger in a wellheadWKM WELLHEAD SYSTEMS·Filed 1979·Granted Jul 29, 1980·23 cites·10 claims
- 1957US4458903AControl line sealing connectionWKM WELLHEAD SYSTEMS·Filed 1982·Granted Jul 10, 1984·28 cites·5 claims
- 2056US4390063AGeothermal wellhead packing assemblyWKM WELLHEAD SYSTEMS·Filed 1981·Granted Jun 28, 1983·26 cites·30 claims
- 2155US4256141ARelay valve for fluid actuatorsWKM WELLHEAD SYSTEMS·Filed 1979·Granted Mar 17, 1981·14 cites·9 claims
- 2254US4347867ASafety valveWKM WELLHEAD SYSTEMS·Filed 1980·Granted Sep 7, 1982·13 cites·9 claims
- 2353US4137942AControl valve having integral visual indicator for fluid safety systemsWKM WELLHEAD SYSTEMS·Filed 1976·Granted Feb 6, 1979·13 cites·10 claims
- 2453US3994517APipe anchor for wellhead assembliesWKM WELLHEAD SYSTEMS·Filed 1975·Granted Nov 30, 1976·22 cites·25 claims
- 2549US4372563APacking support for mounting a well casing packingWKM WELLHEAD SYSTEMS·Filed 1981·Granted Feb 8, 1983·19 cites·5 claims
- 2648US4084613ACombination high-low pilot valveWKM WELLHEAD SYSTEMS·Filed 1976·Granted Apr 18, 1978·11 cites·14 claims
- 2747US4207924AControl valve for fluid actuatorWKM WELLHEAD SYSTEMS·Filed 1978·Granted Jun 17, 1980·10 cites·6 claims
- 2847US4194529AControl valve having integral visual indicator for fluid safety systemsWKM WELLHEAD SYSTEMS·Filed 1978·Granted Mar 25, 1980·12 cites·9 claims
- 2946US4328013ABaffle plate for steam separatorWKM WELLHEAD SYSTEMS·Filed 1980·Granted May 4, 1982·13 cites·10 claims
- 3046US4320779APush-type control valve for fluid actuatorWKM WELLHEAD SYSTEMS·Filed 1980·Granted Mar 23, 1982·9 cites·15 claims
- 3139US4364412APull type relay valve with automatic lockoutWKM WELLHEAD SYSTEMS·Filed 1980·Granted Dec 21, 1982·8 cites·7 claims
- 3237US4196750APush-type control valve for fluid actuatorWKM WELLHEAD SYSTEMS·Filed 1978·Granted Apr 8, 1980·6 cites·4 claims
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