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| Number | Title | Issue Date |
| 7441601 | Perforation gun with integral debris trap apparatus and method of use An improved perforation gun includes an outer gun barrel, which is used in conjunction with an inner movable charge carrier or an inner movable sleeve to trap virtually all of the debris created by the firing of the perforation gun. The charge carrier has a pluralit... | 10/28/2008 |
| 7367394 | Formation evaluation while drilling A sampling while drilling tool positionable in a wellbore penetrating a subterranean formation is provided. The tool includes a drill collar, at least one sample chamber, at least one flowline and at least one cover. The drill collar is operatively connectable to a ... | 05/06/2008 |
| 7303017 | Perforating gun assembly and method for creating perforation cavities A perforating gun assembly (60) for creating communication paths for fluid between a formation (64) and a cased wellbore (66) includes a housing (84), a detonator (86) positioned within the housing (84) and a detonating cord... | 12/04/2007 |
| 7284489 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
| 7284601 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
| 7198105 | Apparatus and method for controlling the pressure of fluid within a sample chamber A formation testing tool and method for providing pressure controlled sampling is provided. A flow line delivers formation fluid to a sample chamber in the testing tool. A first valve controls the flow of formation fluid from the flow line to the sample chamber. A p... | 04/03/2007 |
| 7195889 | Process for stabilizing enzymes with phosphine or phosphite compounds The invention relates to processes for stabilizing the activity of an enzyme, comprising mixing a phosphine or phosphite with an oxidoreductase enzyme. ... | 03/27/2007 |
| 7172023 | Perforating gun assembly and method for enhancing perforation depth A perforating gun assembly (110) for creating communication paths for fluid between a formation (114) and a cased wellbore (116) includes a housing, a detonator and a detonating cord (136). The perforating gun assembly (110) includ... | 02/06/2007 |
| 7172036 | Soil sample containment device and method A soil sample containment device is provided which allows soil samples to be contained within individual sections of a soil sampler liner. The device includes first and second end caps for covering and sealing the respective ends of the soil sampler liner section. E... | 02/06/2007 |
| 7155967 | Formation testing apparatus and method A method and apparatus for testing formations surrounding an earth borehole. The method includes the following steps: providing a tool movable through the borehole; providing a flow line in the tool; establishing fluid communication between the formations and the fl... | 01/02/2007 |
| 7152676 | Techniques and systems associated with perforation and the installation of downhole tools A technique to install a tool in a well includes running the tool into the well and fixing the tool to the well with a fixing agent without pumping the fixing agent through a central passageway of the tool. The tool may be a perforating gun that includes a casing bo... | 12/26/2006 |
| 7140436 | Apparatus and method for controlling the pressure of fluid within a sample chamber A formation testing tool and method for providing pressure controlled sampling is provided. A flow line delivers formation fluid to a sample chamber in the testing tool. A first valve controls the flow of formation fluid from the flow line to the sample chamber. A p... | 11/28/2006 |
| 7082078 | Magnetorheological fluid controlled mud pulser A mud pulser controlled by a field applied to an electroactive fluid. The electroactive fluid is employed to act as a rapid-response brake to slow or interrupt the rotation of a mud motor or mud siren, thus creating pressure pulses in a circulating fluid. In certain... | 07/25/2006 |
| 6976392 | Atomic clock for downhole applications A system and method for acquiring seismic data are disclosed. The system comprises a controller for causing the generation of a seismic signal, where the controller has a first clock used for time-stamping a record of the generated seismic signal. A seismic receiver... | 12/20/2005 |
| 6845825 | Method and apparatus for attaching/detaching drill rod A control system for a drilling machine is disclosed. The drilling machine includes a rod driver for driving a string of rods into the ground, and for removing the string of rods from the ground. The drilling machine also includes a magazine for storing rods near th... | 01/25/2005 |
| 6837105 | Atomic clock for downhole applications A system and method for acquiring seismic data are disclosed. The system comprises a controller for causing the generation of a seismic signal, where the controller has a first clock used for time-stamping a record of the generated seismic signal. A seismic receiver... | 01/04/2005 |
| 6681873 | Core stabilization apparatus and method therefor A core stabilization apparatus and method are implemented. An inner barrel having a plurality of ports disposed circumferentially and axially in a wall thereof is provided. A gas manifold is attached to a first subsets of the ports. Gas is delivered to an... | 01/27/2004 |
| 5445228 | Method and apparatus for formation sampling during the drilling of a hydrocarbon well A tool for obtaining samples of the formation surrounding the wellbore, and method of obtaining such samples, is disclosed. The tool is implemented within a sub in a bottomhole assembly, preferably within side-pocket mandrels in the outer surface of drill... | 08/29/1995 |
| 5031536 | High temperature and pressure igniter for downhole percussion coring guns An igniter is set forth in the present disclosure for use with a coring gun assembly. A bullet equipped with a bottom and having an O-ring thereabout is positioned in a chamber at one end thereof for firing to take a core sample. At the opposite end, an i... | 07/16/1991 |
| 4993503 | Horizontal boring apparatus and method Boring apparatus for forming a generally horizontal underground passage for a utility conduit or the like that includes a tool head with elongated body structure and a cutting face of ellipto-conical form at one end of the elongated body structure. The cu... | 02/19/1991 |
| 4979576 | Percussion core gun construction and cable arrangement An elongate gun assembly with multiple gun chambers is assembled with locking keys holdinhg several chambers in place. In each, a bullet with bottom is placed adjacent to an explosive charge. An elongate cable having two end loops connects with the assemb... | 12/25/1990 |
| 4827823 | Bullet firing mechanism with retrieval cable For use in a gun supporting a bullet for obtaining a core sample therein wherein the bullet is received in a chamber in the gun, a retrieval cable connecting between a pair of studs for threading to the bullet and gun, the cable being coiled to enable the... | 05/09/1989 |
| 4750570 | Formation sampling bullet and cables therefor Sampling bullets of the type which are fired into rock formation surrounding a wellbore. The core sampling bullet includes an internal core barrel which is defined in part by a core receiving sleeve releasably secured within the bullet structure. Followin... | 06/14/1988 |
| 4702327 | Core sample taking bullet construction In the preferred and illustrated embodiment of the core sample bullet construction, a multi-piece construction is set forth. There is a forward, or removable, nose portion. It nests with and connects to a carrier portion. The two portions together define ... | 10/27/1987 |
| 4665791 | Method for accelerating an object and propelling arrangement for implementing the method for such object, particularly an object to be driven into ground below water A method for effectuating the acceleration of an object, in particular a piercing or penetrator object, within a surrounding liquid medium of a density which is higher than the density of gases, such as in water; as well as an arrangement for producing an... | 05/19/1987 |
| 4609056 | Sidewall core gun Disclosed herein is a sidewall core gun attached to the lower end of a drill string, enabling the taking of core samples from within a deviated borehole. The gun also includes an improved charge assembly, including a detonatable cord and one or more defla... | 09/02/1986 |
| 4569403 | Formation sampling bullet Sampling bullets of the type which are fired into rock formations adjacent a well bore. Surprising and unexpected increases in the service life of the bullet and reliability in obtaining and retrieving core samples have been achieved.... | 02/11/1986 |
| 4339947 | Downhole sampling method and apparatus Provided is an apparatus for taking core samples from the side of a borehole which comprises a gun body having a transverse shooting bore, a projectile adapted to be shot from the bore, a tether for tethering the projectile to the gun body, and a permanen... | 07/20/1982 |
| 4280568 | Sidewall sampling apparatus Apparatus for taking a sample of earth formations surrounding a borehole. A core sampling projectile is provided which has a core-taking barrel with a frontal cutting edge and is releasable secured to a base member of relatively more mass than the barrel.... | 07/28/1981 |
| 4220212 | Apparatus for monitoring the operation of well bore guns In the representative embodiment of the new and improved apparatus disclosed herein for monitoring the operation of perforating guns or core-sampling guns carrying one or more electrically-detonatable charges, an impact-actuated monitoring assembly operat... | 09/02/1980 |
