Bizarre Patents
A helium-filled sun shade for protecting individuals engaged in outdoor activities.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7350578 | Diverter plugs for use in well bores and associated methods of use Zonal isolation of well bores is often desirable for performing downhole operations such as stimulation operations. In certain embodiments, diverter plugs for achieving zonal isolation in a casing string in a well bore may comprise a mandrel having a first end and a... | 04/01/2008 |
| 7350582 | Wellbore tool with disintegratable components and method of controlling flow The present invention generally provides a pressure isolation plug for managing a wellbore with multiple zones. The pressure isolation plug generally includes a body with a bore extending therethrough, a first disintegratable ball sized and positioned to restrict up... | 04/01/2008 |
| 7347262 | Downhole sampling tool and method for using same Methods and apparatuses for sampling fluid from a subterranean formation penetrated by a wellbore are provided. The subterranean formation has clean formation fluid therein, and the wellbore has a contaminated fluid therein extending into an invaded zone about the w... | 03/25/2008 |
| 7275595 | Method and apparatus to isolate fluids during gravel pack operations The present invention provides for an apparatus and method to displace fluids and to prevent the mixing or bypassing of fluids used in gravel pack operations. A moveable plug is used to create a physical partition between fluids. ... | 10/02/2007 |
| 7216703 | Method and apparatus for testing and treatment of a completed well with production tubing in place A method and apparatus is used to test and/or treat individual production zones of a well in conjunction with a conventional coiled tubing unit. This method and apparatus allows testing and treatment of a well with production tubing in place. The return flowpath for... | 05/15/2007 |
| 7191844 | Inflate control system for inflatable straddle stimulation tool A method and apparatus for controlling inflation and deflation of spaced inflatable packer elements of a straddle stimulation tool within a well casing of a well. A straddle stimulation tool is positioned by tubing at a desired location within the well casing. Fluid... | 03/20/2007 |
| 6973966 | Compressible darts and methods for using these darts in subterranean wells The present invention relates generally to subterranean well construction, and more particularly, to improved darts and methods of using these darts in subterranean wells. In one embodiment, the present invention provides a dart for activating a plug located within ... | 12/13/2005 |
| 6948561 | Indexing apparatus An indexing mechanism is disclosed that can put a tool in a variety of positions while downhole in the face of high static and dynamic loads. In the preferred application, the mechanism controls a movable sleeve on a downhole choke. It contains an indexing feature c... | 09/27/2005 |
| 6752209 | Cementing system and method for wellbores The present invention provides a cementing system and method for wellbores by cementing an annulus between a wellbore casing and a wellbore. In at least one embodiment, the invention includes a landing collar defining a restricted passage, a wellbore casing defining... | 06/22/2004 |
| 6675897 | Downhole bypass valve The present invention relates to bypass valves for use in wellbores, particularly but not exclusively to bypass valves used during the setting of hydraulic anchor packers. A bypass valve (2) is provided with a piston (30) slidably mounted adjacent a body ... | 01/13/2004 |
| 6349771 | Flow actuated shut-off valve The present invention generally provides a system and method for selectively sealing a drill string or other tubular member. In one aspect, a sealing member, such as a valve, allows a certain level of flow of drilling fluids and/or other fluids through on... | 02/26/2002 |
| 5433270 | Cementing plug Cementing plugs for use in the cementing of casing in oil and gas wells. The cementing plugs are well-suited for use with a polycrystalline diamond compact drill bit.... | 07/18/1995 |
| 5361835 | Cementing plug Cementing plugs for use in the cementing of casing in oil and gas wells. The cementing plugs are well-suited for use with a polycrystalline diamond compact drill bit.... | 11/08/1994 |
| 5311940 | Cementing plug Cementing plugs for use in the cementing of casing in oil and gas wells. The cementing plugs are well-suited for use with a polycrystalline diamond compact drill bit.... | 05/17/1994 |
| 5297629 | Drill stem testing with tubing conveyed perforation A well test string includes an annulus pressure responsive tester valve and a tubing conveyed perforating gun including a tubing pressure actuated time delay firing mechanism. A compression set packer is disposed in the test string between the tester valv... | 03/29/1994 |
| 5168931 | Fluid control valve A fluid control valve for use in retaining well treatment fluids above a circulating valve and packer in a tool string. The fluid control valve comprises a ball seat with a seating surface thereon, a sealing ball for sealingly engaging the sealing surface... | 12/08/1992 |
| 5131473 | Controlled rate well cementing tool An improved tool for controlling the rate of flow of cement into a well to control the consolidation of a formation is disclosed. The tool comprises a housing, an actuator and a valve member, motion of which is controlled by axial motion of the actuator w... | 07/21/1992 |
| 4638859 | Gravel packer The present invention comprises a retrievable gravel packer for circulation and squeeze type gravel packing. The gravel packer includes a compression-set packer element, a J-slot assembly to releasably maintain the gravel packer in an unset mode, a ratche... | 01/27/1987 |
| 4627492 | Well tool having latching mechanism and method of utilizing the same A well tool having reciprocating portions can be locked in a predetermined position by a latching mechanism which is responsive to externally applied pressure, as opposed to mere movement of the reciprocating elements to the predetermined position. The ac... | 12/09/1986 |
| 4590998 | Tubing valve Disclosed is a tubing valve which may be used for selectively closing passages through tubular members and the like. The valve includes first and second housing members which may be mutually moved and which carry a latch assembly for limiting such movemen... | 05/27/1986 |
| 4566535 | Dual packer apparatus and method A dual packer apparatus comprises a tubular outer assembly including upper and lower packers interconnected and spaced apart by tubular spacers. Ports in the outer assembly provide for communication with a well zone between the two packers and a well zone... | 01/28/1986 |
| 4502537 | Annular sample chamber, full bore, APR.RTM. sampler An annulus pressure responsive sampler valve comprising a power section and a sampler section having an annular sample chamber therein; the sampler valve having a full bore therethrough.... | 03/05/1985 |
| 4461353 | Well safety valve A retrievable well safety valve in a cased well system including a tubing string, a dual packer downhole around the tubing sealing with the casing and submersible pump in the tubing string below the packer. The safety valve controls flow of pumped fluids throu... | 07/24/1984 |
| 4441552 | Hydraulic setting tool with flapper valve A hydraulic setting tool for use with a packer having expandable anchor means for anchoring the packer in a well bore, a conduit to permit flow through the packer, and a slidable valve positioned in the conduit having an open lower position and a closed u... | 04/10/1984 |
| 4436149 | Hydraulic setting tool Apparatus for setting in a bore a well tool of the type having radially expandable anchor means and a mandrel-actuated slidable valve for permitting flow through the tool. Inner and outer sleeves are telescopically interengaged for suspension from a condu... | 03/13/1984 |
| 4372388 | Subsurface control valve A subsurface control valve for use in shutting off a well bore. The valve comprises a valve assembly and a stinger assembly, which is run into the well bore on drill pipe with a packer placed below the valve in the string. The valve is open as the string ... | 02/08/1983 |
| 4354554 | Well safety valve A wire line removable well safety valve in an oil and gas well completion design including a tubing string, a well packer around the tubing string sealing with the well casing, and a submergible well pump on the tubing string below the packer. The safety ... | 10/19/1982 |
| 4164977 | Well latch Disclosed is a well latch for locking well tools in a well flow conductor. The latch housing has a pressure equalizing passage extending through its wall. A valve controls flow through the equalizing passage. Keys, carried by the latch housing, are expand... | 08/21/1979 |
| 4103741 | Oil well perforation testing device An elongated tubular assembly is provided defining a longitudinal central passage therethrough. Longitudinally spaced opposing packer structures are carried by and extend about the exterior of the tubing assembly and the latter includes a bypass passage e... | 08/01/1978 |
| 4069865 | Bottom hole fluid pressure communicating probe and locking mandrel A well bottom hole fluid pressure measuring structure including external to internal pressure transducer fluid passage communicating structure with pressure balancing on engaged probe members to prevent undesired pressure lift separation of one probe sect... | 01/24/1978 |
| 4057118 | Bit packer for dual tube drilling A bit packer for use with a string of dual concentric drill pipe, having inner and outer tubular members concentrically arranged to mate with the inner and outer pipes of the drill string to provide an annular conduit for fluid from surface to bit and a c... | 11/08/1977 |
