Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8181699 | Auxiliary conduit cutting apparatus A cutting assembly for external conduits on a tubing string features a breakaway in the string that can be severed with a tensile force. Preferably each external conduit is run through a cutter housing. Upon severing of the string and applying a pickup force, a tens... | 05/22/2012 |
| 7600562 | Non-explosive tubing perforator and method of perforating An improved perforating apparatus that creates drain holes in well tubing without the use of explosives. A hydraulically-activated apparatus created from machined metal pipes and solid metal bars that form four main sections, a hollow metal pipe 10, hollow me... | 10/13/2009 |
| 7370702 | Single mill casing window cutting tool and method An apparatus for cutting a window in a casing pipe in a well, having only a single mill with full gage primary cutting inserts of a very hard, highly wear resistant, material. The primary inserts can be protected from damage by forming each blade on the mill with an... | 05/13/2008 |
| 7353889 | Rotary driven pipe-bursting tool An apparatus for bursting pipe is preferably adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment, a plurality of pipe-bursting members, driven by the interconnected inner members, cut or burst a subterr... | 04/08/2008 |
| 7225872 | Perforating tubulars A device for perforating a tubing string residing in a well bore includes a tubular housing adapted to pass through the tubing string. At least one perforating body is provided residing in the housing, and has a point adapted to pierce the tubing string. A piston is... | 06/05/2007 |
| 7128168 | Reamer apparatus for ground boring machine The invention provides a reamer apparatus for a ground boring machine that is capable of restricting increase in drawing resistance when performing drawing of a buried pipe by using a reamer and of efficiently performing drawing operations of the buried pipe without... | 10/31/2006 |
| 6973970 | Apparatus and methods for establishing secondary hydraulics in a downhole tool A tool for making a cut inside a downhole tool, including a housing adapted to move in the downhole tool, a plurality of openings in a wall of the housing that provides a passage from inside the housing to an exterior of the housing, a plurality of cutters disposed ... | 12/13/2005 |
| 6964303 | Horizontal directional drilling in wells A method and apparatus for horizontally drilling in wells utilizing a shoe assembly at the down hole end of upset tubing. The shoe assembly includes a fixed section and a rotatable section suspended below the fixed section. An electric motor and associated batteries... | 11/15/2005 |
| 6953093 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve A tubing retrievable safety valve (50) having a non annular hydraulic chamber (60) in a sidewall portion thereof is operable to received a communication tool (100) therein such that relative rotation between at least a portion of the communicati... | 10/11/2005 |
| 6935423 | Borehole retention device A borehole retention assembly for anchoring a well tool within a wellbore including a gripping assembly and an actuation assembly. The gripping assembly includes expandable members such that upon expanding the expandable members, the gripping assembly engages the wa... | 08/30/2005 |
| 6840320 | Method and apparatus for forming an optimized window Methods and apparatus are described for forming a window of optimum dimensions in casing wall. A window of maximum width is cut when the center line of the mill tool is located inside of the inner diameter of the casing where a maximum amount of casing is drilled aw... | 01/11/2005 |
| 6805197 | Hydraulic wireline cutter A combination tool for attaching to a stuck wireline tool, then cutting the wireline just above the stuck tool with a hydraulically driven cutter, allowing the wireline to be pulled out of the hole before fishing out the stuck tool. A side door can be provided on th... | 10/19/2004 |
| 6763753 | Hydraulic wireline cutter A combination tool for attaching to a stuck wireline tool, then cutting the wireline just above the stuck tool with a hydraulically driven cutter, allowing the wireline to be pulled out of the hole before fishing out the stuck tool. A side door can be provided on th... | 07/20/2004 |
| 6499538 | Method and apparatus for forming an optimized window Methods and apparatus are described for forming a window of optimum dimensions in casing wall. A window of maximum width is cut when the center line of the mill tool is located inside of the inner diameter of the casing where a maximum amount of casing is... | 12/31/2002 |
| 6439323 | Seismic shothole reaming module An apparatus for shaping boreholes used in seismic operations. A drill body is attached to a drill bit and is movable in axial and rotational directions. Selective operation of the drill body causes a moveable sleeve to operate a reaming bit to extend thr... | 08/27/2002 |
| 6213210 | Removal of lining from tubing A cutting tool and a rotatable removal tool can be used together in a system and method for removing lining from tubing in a well. A particular cutting tool includes a mandrel, a sleeve mounted on the mandrel, and a cutting member connected to the sleeve.... | 04/10/2001 |
| 6186234 | Removal of lining from tubing A cutting tool and a rotatable removal tool can be used together in a system and method for removing lining from tubing in a well. A particular cutting tool includes a mandrel, a sleeve mounted on the mandrel, and a cutting member connected to the sleeve.... | 02/13/2001 |
| 6098708 | Apparatus for pulling a pipe into an earth bore An apparatus for pulling a pipe (12) into an earth bore, especially for replacing a breakable supply conductor laid in the earth, includes an approximately conical displacement head having a cylindrical tubular shaft (18) connected to its large diametered... | 08/08/2000 |
| 6092594 | Device for making or regenerating a water well A device for making or regenerating a water well, said well comprising a casing installed inside a borehole in the ground. The device comprises a operating head with angularly equispaced radial seats in which respective punch tools for forming holes, wind... | 07/25/2000 |
| 5833003 | Apparatus for completing a subterranean well and associated methods of using same Apparatus and associated methods of using provide subterranean well completion wherein a lateral wellbore liner has divided a parent wellbore. In a preferred embodiment, a sidewall cutting apparatus is positionable within the liner and has a cutting tool ... | 11/10/1998 |
| 5823255 | Tubular casing cutter A machine for cutting a length of pipe has a body with cross-sectional dimensions which are less than the inner diameter of the pipe to be cut. The machine has a plurality of legs which extend radially from the body such that the machine can be fitted wit... | 10/20/1998 |
| 5690170 | Hydraulic cutting overshot An overshot cutter for suspension from coiled tubing that includes an elongate housing which includes a drive piston at the upper end with adjustable axial passage, an inner barrel there-below, and a cutter piston extending a collet cutter next below and ... | 11/25/1997 |
| 5306101 | Cutting/expanding tool A cutting/expanding tool includes a cylindrical support body having a guide side and a cutting side, a pair of guide rollers mounted in tandem along the longitudinal axis of the support body on the guide side, a cutting wheel mounted between the tandem gu... | 04/26/1994 |
| 5192165 | Trenchless replacement of conduits in an underground conduit bank A method and apparatus for replacing an individual conduit located within a bank of individual conduits, without rendering inoperable the surrounding adjacent individual conduits of the bank. A conduit expander is pulled through the subject individual con... | 03/09/1993 |
| 5171106 | Cutting/expanding tool A cutting/expanding tool includes a cylindrical support body having a guide side and a cutting side, a pair of guide rollers mounted in tandem along the longitudinal axis of the support body on the guide side, a cutting wheel mounted between the tandem gu... | 12/15/1992 |
| 5098225 | Cutting/expanding tool A cutting/expanding tool includes a cylindrical support body having a guide side and a cutting side, a pair of guide rollers mounted in tandem along the longitudinal axis of the support body on the guide side, a cutting wheel mounted between the tandem gu... | 03/24/1992 |
| 5074355 | Section mill with multiple cutting blades A section mill for cutting through well casing, the mill including multiple sets of cutting blades which are selectively engaged to continue cutting operations as blades dull. The cutting blade sets are selectively indexable such that as a first set dulls... | 12/24/1991 |
| 4981177 | Method and apparatus for establishing communication with a downhole portion of a control fluid pipe A downhole tool, such as a safety valve or a stand-alone nipple, has a tubular housing. An axially extending bore is provided in the wall of the housing. A radially extending recess is provided in the internal bore wall of the housing, encompassing the ax... | 01/01/1991 |
| 4928757 | Hydraulic well penetration apparatus A well casing penetrator includes an elongated housing having a work fluid input chamber and enclosing an outwardly movable hydraulic cylinder driven punch for cutting an opening in a casing. A high pressure liquid jet nozzle is mounted on the end of a la... | 05/29/1990 |
| 4883118 | Combination tubing cutter and releasing overshot A mechanical tubing cutter for severing and retrieving fish from wells comprises a slip body for clamping the upper end of the fish, and cam-actuated cutter knives for severing the fish below the slip body. The clamping and cutting operations occur in an ... | 11/28/1989 |
| 4790384 | Hydraulic well penetration apparatus and method A well casing penetrator includes an elongated housing enclosing an outwardly movable hydraulic cylinder driven punch for cutting an opening in a casing. A high pressure liquid jet nozzle is mounted on the end of a hose which moves outwardly through an ax... | 12/13/1988 |
| 4789268 | Device and method for removing irregularities in or enlarging an underground duct A device for removing irregularities in or enlarging a buried duct comprises a cylindrical housing corresponding approximately in diameter to the required diameter of the duct, an expandable shell comprising a plurality of tapered leaf members pivotally a... | 12/06/1988 |
| 4693404 | Mains bursting tool A tool has a hollow elongated body 10 made up of a leading section 12 attachable to a tow-cable by a clevis 28, an intermediate section 14 and a trailing section 20 housing a hydraulic cylinder 24 and attachable to a main liner 30. The intermediate sectio... | 09/15/1987 |
| 4646826 | Well string cutting apparatus A well cutting tool for cutting casing in a well bore having a cutter body and at least one cutting arm pivotally mounted in a longitudinally extending slot of the cutter body. The cutting arm has removable and replaceable cutting inserts positioned along... | 03/03/1987 |
| 4640362 | Well penetration apparatus and method A well casing penetrator includes an elongated housing enclosing an outwardly movable hydraulic driven punch for cutting an opening in a casing. A high pressure liquid jet nozzle is mounted on the end of a hose which moves outwardly through an axial bore ... | 02/03/1987 |
| 4624307 | Explosive perforating tool An explosive perforating tool has an elongated barrel having a piston disposed substantially within. A radial passage extends from the outer surface of the barrel into the longitudinal cavity, thereby allowing the piston to be explosively driven from the ... | 11/25/1986 |
| 4512411 | Fluid actuated energy charged well service line cutter A well service line cutter for connection in a well conduit for cutting a line extending therethrough. A housing having a bore through which a service line may extend and the housing is adapted to be connected in a well conduit. An energy chamber for hold... | 04/23/1985 |
| 4507019 | Method and apparatus for replacing buried pipe A pipeline replacement system incorporating an expansion and line replacement mandrel and having a power system for imparting linear movement and rotation to the mandrel. Within the scope of the invention, the mandrel may be pushed or pulled or both pushe... | 03/26/1985 |
| 4266621 | Well casing window mill A diamond milling cutter for elongating a laterally opening window in a well casing set in a well bore extending into the earth. The mill has a revolving surface which engages a sidetracking whipstock or the edge of the casing being milled to urge the mil... | 05/12/1981 |
| 4165784 | Casing perforator The present invention involves a tool for connection to a conventional drill string and operation therewith for punching holes in a standard casing located within a well bore to pass water or gas therethrough for recovery at the well bore surface, the inv... | 08/28/1979 |
