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| Number | Title | Issue Date |
| 7290609 | Subterranean well secondary plugging tool for repair of a first plug A secondary plugging tool is disclosed for use in a subterranean plug, such as in a plugged and/or abandoned well. The repaired plug may be of a cementicious material, or a mechanically, hydraulically or electrically set plug or packer. The plugging tool includes an... | 11/06/2007 |
| 7108067 | Method and apparatus for wellbore fluid treatment A tubing string assembly for fluid treatment of a wellbore includes substantially pressure holding closures spaced along the tubing string, which each close at least one port through the tubing string wall. The closures are openable by a sleeve drivable through the ... | 09/19/2006 |
| 6962204 | Isolation container for a downhole electric pump An isolation container designed for use with a downhole electric pump assembly commonly used in oil and gas drilling and production operations is disclosed. The isolation container has an annular housing with an axial inlet and outlet bore. A downhole electric pump ... | 11/08/2005 |
| 6755252 | Downhole surge pressure reduction and filtering apparatus The present invention provides a downhole cementing apparatus run into a borehole on a tubular. The apparatus is constructed on the pipe in such a way that pressure surge during run-in is reduced by allowing fluid to enter the pipe and utilize the fluid pathway of t... | 06/29/2004 |
| 6439306 | Actuation of downhole devices A tool string for use in wellbore includes a sampler device having a port to receive pressure in an annulus region of the wellbore. An elevated pressure is communicated to a rupture disk assembly located in the port to rupture the rupture disk assembly. T... | 08/27/2002 |
| 5392850 | System for isolating multiple gravel packed zones in wells A gravel pack screen assembly adapted to produce fluids from two spaced apart zones of interest through gravel packing surrounding spaced apart gravel pack screens includes a sub interposed in the screen assembly between the two screens and having a reser... | 02/28/1995 |
| 5058674 | Wellbore fluid sampler and method A well fluid sampling apparatus provides a time delay after actuation of the tool and before a sample is taken. The tool is operated by well pressure acting on a piston. The piston is initially hydraulically blocked so that it cannot move. The time delay ... | 10/22/1991 |
| 4696343 | Wireline dump bailer A dump bailer is lowered on a wireline in a well through tubing for placing a cement slurry on a retainer located in the well. The dump bailer has a weight bar assembly that includes upper and lower sections that are extensible relative to each other. The... | 09/29/1987 |
| 4597439 | Full-bore sample-collecting apparatus In the representative embodiments of the new and improved apparatus disclosed herein, a string of full-bore well tools are arranged to be suspended from a pipe string in a well bore penetrating an earth formation in flow communication with the well bore. ... | 07/01/1986 |
| 4421166 | Apparatus for injecting material into a well-bore Injector apparatus is disclosed which includes a sealed self-contained replaceable vessel containing an ejectable material to be injected into the well-bore during well logging operations. The vessel comprises a flexible-wall, collapsible tubular-like car... | 12/20/1983 |
| 4378050 | Arrangement for full hole drilling An arrangement for full hole drilling, wherein a drilling bit having a passage for drilling fluid is attached to a drill pipe string. A hole wall former is provided above the bit for closing the space between the hole walls and the drill pipe string. A co... | 03/29/1983 |
| 4276934 | Method and device for blocking wells to extinguish fires, prohibit saltwater intrusion, etc. A well, such as an oil well, may be plugged, on command, from the well head, by activating a plurality of preplaced motor-driven, foam generating capsules causing a foam to be generated and forced into the well hole where it hardens.... | 07/07/1981 |
| 4149592 | Containers for indicators An apparatus is provided for determining the locus of a processing zone which advances through a fragmented permeable mass of particles in an in situ oil shale retort in a subterranean formation containing oil shale. The apparatus, which functions by rele... | 04/17/1979 |
| 3986553 | Fluid sampling vessel A sampling vessel, adpated particularly for use in geothermal bores, constructed principally of stainless steel and opened at depth without ancillary means such as messengers by causing an inertial mechanism to break a frangible seal.... | 10/19/1976 |
| 3973630 | Wash-out tool and method of use thereof A standing valve wash-out tool comprises: A. a vertically elongated tubular body, B. elastomer cup means on the body to engage a well tubing bore as the body travels lengthwise within said bore in response to fluid pressure exertion on the cup means exteriorly... | 08/10/1976 |
