| Patent Number |
Title Of Patent |
Date Issued |
| 7426964 |
Release mechanism for downhole tool |
September 23, 2008 |
| A release mechanism for a downhole tool is actuated by radial movement of a locking member. The locking member provided as much as full circumferential support in the locked position and once released can be prevented from re-gripping the previously connected elements. Illustrative e |
| 7422068 |
Casing patch overshot |
September 9, 2008 |
| A connection to a stub downhole is accomplished in a variety of ways. A string has a tapered lower end inserted into the stub and expansion occurs from within the tapered lower end into the stub to leave a connection without reduction of the internal diameter. An overshot fitting can |
| 7222669 |
Method of repair of collapsed or damaged tubulars downhole |
May 29, 2007 |
| A method of repairing tubulars downhole is described. A swage is secured to a force magnification tool, which is, in turn, supported by an anchor tool. Applied pressure sets the anchor when the swage is properly positioned. The force magnification tool strokes the swage through the c |
| 7156182 |
Method and apparatus for one trip tubular expansion |
January 2, 2007 |
| A one trip system for expanding a tubular that is solid or perforated or a screen comprises a downhole assembly that features a hydraulic anchor that can be set, released and repositioned to repeat the process. The anchor is small enough to go through the tubular or screen after initial |
| 7114559 |
Method of repair of collapsed or damaged tubulars downhole |
October 3, 2006 |
| A method of repairing tubulars downhole is described. A swage is secured to a force magnification tool, which is, in turn, supported by an anchor tool. Applied pressure sets the anchor when the swage is properly positioned. The force magnification tool strokes the swage through the c |
| 7100700 |
Downhole ball dropping apparatus |
September 5, 2006 |
| A ball release mechanism is mounted near the intended seat. The ball or balls are kept out of the circulating stream. High circulation rates followed by curtailment of circulation places an outlet port in position to allow the ball or balls to be pushed out by a spring. The spring or |
| 6866104 |
Drop in dart activated downhole vibration tool |
March 15, 2005 |
| A downhole vibration tool consisting of a body assembly installed in a work string, and a drop-in dart valve assembly. An open inner bore through the body assembly allows the performance of operations through the body assembly. To activate the vibration tool, the dart valve assembly is |
| 6679328 |
Reverse section milling method and apparatus |
January 20, 2004 |
| A method and apparatus for milling a section of casing in an upward direction, utilizing a downhole hydraulic thrusting mechanism for pulling a section mill upwardly. A downhole motor and torque anchor can be used to rotate the section mill, or the mill can be rotated by a work string. A |
| 6607031 |
Screened boot basket/filter |
August 19, 2003 |
| A downhole debris filtering apparatus has the flow diverter retracted as the tool is run in. Settling velocity is the rate at which debris will fall through the fluid. Settling velocity is dependent on the density of the fluid and the debris density. If the fluid velocity exceeds the |
| 6464434 |
Cutting matrix and method applying the same |
October 15, 2002 |
| A method for applying cutting elements to a tool for cutting or milling a metal item in a well is disclosed, along with the cutting element used in the method. The tool can include one or more blades extending outwardly or downwardly from the tool for cutting a metal item such as the wal |
| 6227313 |
Anti-torque tool |
May 8, 2001 |
| A downhole tool for engaging a borehole wall of a well, with outwardly displacing gripping elements to engage the borehole wall in such a way as to prevent rotation of the tool relative to the borehole wall, thereby preventing a downhole motor from imposing a reactive torque on the w |
| 6167958 |
Cutting matrix and method of applying the same |
January 2, 2001 |
| A method for applying cutting elements to a tool for cutting or milling a metal item in a well, along with the cutting element used in the method. The tool can include one or more blades extending outwardly or downwardly from the tool for cutting a metal item such as the wall of a casing |
| 6155343 |
System for cutting materials in wellbores |
December 5, 2000 |
| The present invention provides a downhole cutting tool for cutting materials at a worksite in a wellbore. The cutting tool includes a cutting end that is adapted to discharge a high pressure fluid therefrom. A power unit in the tool includes a plurality of serially arranged pressure |
| 6125929 |
Casing cutter blade support sleeve |
October 3, 2000 |
| A blade support assembly for use with a casing cutter to cut through casing or pipe downhole in a well. A tubular body fits over the casing cutter, with slots aligned with the pivoting cutter blades. Support plates next to each slot provide support for the blades during cutting operation |
| 6041860 |
Apparatus and method for performing imaging and downhole operations at a work site in wellbores |
March 28, 2000 |
| The present invention provides a downhole service tool for imaging a location constituting a work site of interest downhole at which a tool operation is to be performed in a preexisting wellbore and for performing a tool operation at the work site during a single trip of the tool, The |
| 6012526 |
Method for sealing the junctions in multilateral wells |
January 11, 2000 |
| Junctions in multilateral well structures are sealed by employing a variety of degrees of premachined components and a variety of sealing embodiments, including casing segments having premachined windows, side pocket members which are adapted to reside within the string during run in and |
| 6009948 |
Resonance tools for use in wellbores |
January 4, 2000 |
| The present invention provides a system for performing a suitable operation in a wellbore utilizing a resonator. The system includes a resonator for generating pulses of mechanical energy, an engaging device for securely engaging an object in the wellbore and a sensor for detecting the r |
| 5979571 |
Combination milling tool and drill bit |
November 9, 1999 |
| A combination metal milling and earth drilling tool, for use in performing a single trip kickoff from a casing in a well bore. The combination milling and drilling tool has a first, relatively more durable cutting structure, such as tungsten carbide, and a second, relatively harder c |
| 5899268 |
Downhole milling tool |
May 4, 1999 |
| A tool for cutting or milling casing in a well is disclosed. It includes a plurality of blades extending outwardly to a substantially radial position for cutting the walls of casing strings and removing a predetermined length of the casing strings in a cutting action. The blades have cut |
| 5829524 |
High pressure casing patch |
November 3, 1998 |
| A casing patch is disclosed which uses one or more fins which elastically flex to accept a casing stub. The casing stub is prepared with a dressing tool containing a special mill to obtain the requisite finish on its outer surface prior to insertion of the casing patch. The flexible fin |
| 5810079 |
Downhole milling tool |
September 22, 1998 |
| A tool for cutting or milling casing in a well is disclosed. It includes a plurality of blades extending outwardly to a substantially radial position for cutting the walls of casing strings and removing a predetermined length of the casing strings in a cutting action. The blades have cut |
| 5494111 |
Permanent whipstock |
February 27, 1996 |
| This invention relates to a permanent whipstock assembly which uses camming pivot arms to secure the whipstock at the desired location within a cased wellbore. Camming pivot arms are pivotally attached to the downhole end of a whipstock housing and are further attached to a slip pad. Int |
| 5474126 |
Retrievable whipstock system |
December 12, 1995 |
| A whipstock assembly is provided for lowering within a cased wellbore, cutting a window through a casing for drilling a sidetrack borehole, and retrieving with conventional fishing tools. The whipstock assembly includes two separate whipstocks having different tapers, and which are r |
| 5456312 |
Downhole milling tool |
October 10, 1995 |
| A tool for cutting or milling casing in a well is disclosed. It includes a plurality of blades extending outwardly to a substantially radial position for cutting the walls of casing strings and removing a predetermined length of the casing strings in a cutting action. The blades have cut |
| 5423387 |
Method for sidetracking below reduced-diameter tubulars |
June 13, 1995 |
| The apparatus and method of the present invention facilitate the initiation of lateral bores from a main wellbore in a completed well having a packer and a tubing string. The preferred method involves setting a plug, which may be removed, through the tubing string, followed by a layer of |
| 5373900 |
Downhole milling tool |
December 20, 1994 |
| A tool for cutting or milling casing in a well is disclosed. It includes a plurality of blades extending outwardly to a substantially radial position for cutting the walls of casing strings and removing a predetermined length of the casing strings in a cutting action. The blades have cut |
| 5297630 |
Downhole milling tool |
March 29, 1994 |
| A cutting tool (22) includes a plurality of pivoted blades (36) for swinging outwardly to an expanded radial position for first cutting the walls of multiple casing strings (10, 11), and then removing a predetermined length of the casing strings (10, 11) simultaneously in a cutting a |
| 5150755 |
Milling tool and method for milling multiple casing strings |
September 29, 1992 |
| A cutting tool (22) includes a plurality of pivoted blades (36) for swinging outwardly to an expanded radial position for first cutting the walls of multiple casing strings (10, 11), and then removing a predetermined length of the casing strings (10, 11) simultaneously in a cutting a |
| 5086838 |
Tapered cutting tool for reaming tubular members in well bore |
February 11, 1992 |
| A cutting tool (20) has a tool body (26) positioned within a metal casing (12) for reaming the inner peripheral surface of the casing (12) to a uniform smooth inner diameter. Tool body (26) has a lower end body portion (28), a generally cylindrical intermediate body portion (30), and a |
| 5058666 |
Cutting tool for removing materials from well bore |
October 22, 1991 |
| A cutting tool (10) for removing members downhole from a well bore and adapted to be inserted within a well from the upper end (12) of the casing (14). The cutting tool (10) includes a plurality of elongate blades (32) on the cylindrical body (18) of the cutting tool (10). Cutting elemen |
| 5038859 |
Cutting tool for removing man-made members from well bore |
August 13, 1991 |
| A cutting tool (10) for removing metal tubular members held in stationary position downhole from a well bore and adapted to be inserted within a well. The cutting tool (10) includes a plurality of elongate blades (32,34) on the cylindrical body (22) of the cutting tool (10) which extend |
| 5014778 |
Milling tool for cutting well casing |
May 14, 1991 |
| An oil field cutting tool (10) for progressively cutting away a tubular member (14) installed within a well from the upper annular end (12) of the tubular member (14). The cutting tool (10) includes a plurality of elongate blades (32) spaced about the periphery of the cylindrical body |
| 4978260 |
Cutting tool for removing materials from well bore |
December 18, 1990 |
| A cutting tool (10) for removing members downhole from a well bore and adapted to be inserted within a well from the upper end (12) of the casing (14). The cutting tool (10) includes a plurality of elongate blades (32) on the cylindrical body (18) of the cutting tool (10). Cutting elemen |
| 4938291 |
Cutting tool for cutting well casing |
July 3, 1990 |
| A cutting tool (22) having elongate cutter arms (36) mounted about a pivot pin (40) for outward swinging movement. Cutting blades (58, 60) are mounted on the lower ends of the cutter arms (36) and have a plurality of closely fitting hard carbide cutting elements (90) secured thereto and |
| 4887668 |
Cutting tool for cutting well casing |
December 19, 1989 |
| A cutting tool (22) having elongate cutter arms (36) mounted about a pivot pin (40) for outward swinging movement. Cutting blades (58, 60) are mounted on the lower ends of the cutter arms (36) and have a plurality of closely fitting hard carbide cutting elements (90) secured thereto and |
| 4796709 |
Milling tool for cutting well casing |
January 10, 1989 |
| A milling tool (10) for processively cutting away a section of casing (14) installed within a well from the upper annular end (12) of the casing (14). The milling tool (10) includes a plurality of elongate blades (32) equally spaced from each other at intervals between one and three inch |
| 4776394 |
Hydraulic stabilizer for bore hole tool |
October 11, 1988 |
| A stabilizer (36) mounted on a mandrel (14) of a workstring (12) within a casing (10) of a well bore hole. The stabilizer (36) has an upper carrier (38) fixed to the mandrel (14) and a lower carrier (40) mounted on the mandrel (14) for relative sliding movement. Shoes (70) are mounted by |
