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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 8424595 | Method and apparatus for releasing a coiled tubing internal conduit from a bottom hole assembly A method and apparatus for releasing a coiled tubing internal line from a bottom hole assembly. The internal line may not have strength sufficient to permit the application of a tension force at the surface to disconnect the internal line from the bottom hole assemb... | 04/23/2013 |
| 8376040 | Cutting device and a method for emergency cutting of a line in a well A cutting device and a method for emergency cutting of a line in a well are disclosed. The cutting device includes a tapering guide including a narrow end portion and a wide end portion for feed-through of the line, the narrow end portion being placed, when in its p... | 02/19/2013 |
| 8336612 | Severing of downhole tubing with associated cable Methods for severing a tubular string having a cable in association therewith can include lowering a cutting apparatus into the tubular string and actuating the cutting apparatus to form a cut in the tubular string and sever the cable. Severing the cable in this man... | 12/25/2012 |
| 8118088 | Shear activated safety valve system A safety valve system includes a safety valve having an actuator and a line connected to the actuator. The safety valve is operable by opening the line in the well, with the line being free of any connection to a surface control system. Another safety valve system i... | 02/21/2012 |
| 8082980 | Downhole well access line cutting tool A cutting tool for cutting a wireline, slickline, coiled tubing, or other well access line stuck downhole in a well. The tool includes a host of features including a propulsion mechanism to aid in delivering the tool to a predetermined cut location of the line. In t... | 12/27/2011 |
| 7971637 | Dual mini well surface control system A well surface control system for use with various types of work strings such as, but not limited to, drill strings, coiled tubing, snubbing pipe, electric line, production tubing, and wireline. The system includes a main housing with a main bore extending from one ... | 07/05/2011 |
| 7963319 | Downhole cable gripping/shearing device Embodiments of the present invention generally relate to methods and apparatuses for gripping and shearing a downhole cable. In one embodiment, a line cutter mandrel includes: a tubular mandrel; a pocket disposed along an outer surface of the mandrel and longitudina... | 06/21/2011 |
| 7810553 | Coiled tubing wireline cutter A wireline cutter comprises a primary housing with a first axial bore configured to receive a wireline positioned within a well bore, and a first blade mounted within the primary housing and operable to cut the wireline. A method of cutting a wireline in a well bore... | 10/12/2010 |
| 7624792 | Shear activated safety valve system A safety valve system includes a safety valve having an actuator and a line connected to the actuator. The safety valve is operable by opening the line in the well, with the line being free of any connection to a surface control system. Another safety valve system i... | 12/01/2009 |
| 7422055 | Coiled tubing wireline cutter A wireline cutter comprises a primary housing with a first axial bore configured to receive a wireline positioned within a well bore, and a first blade mounted within the primary housing and operable to cut the wireline. A method of cutting a wireline in a well bore... | 09/09/2008 |
| 7264060 | Side entry sub hydraulic wireline cutter and method A side entry sub for use with a drill string, where the side entry sub receives a wireline within its inner diameter. The present invention includes a device capable of severing the wireline proximate to the side entry sub. The present invention can further include ... | 09/04/2007 |
| 7225873 | Coiled tubing cutter A cutting module to sever a tubing in a well includes a piston and shear blade. The piston includes at least two moveable telescoping elements, which are adapted to expand the first piston from a retracted length to an expanded length. The shear blade is connected t... | 06/05/2007 |
| 7134374 | Safety cable cutter for cutting a cable used in servicing an oil and gas well A safety cable cutter used for cutting a cable used in servicing an oil and gas well. A centrifugal arm roller and a guide roller are mounted on top of a frame. The cable is received on the rollers as the cable is lowered down a well bore. Mounted on ends of the cen... | 11/14/2006 |
| 7128155 | Cutting tool and method of cutting an object in a well A cutting device cuts one or more downhole control lines such that the cut ends of the one or more control lines will not interfere with subsequent fishing operations. The cutting device comprises a mandrel, a cutting sleeve and a housing supported on a tubing. Move... | 10/31/2006 |
| 7114563 | Tubing or drill pipe conveyed downhole tool system with releasable wireline cable head A downhole tool system comprising a side entry sub comprising a side entry adapted to receive a wireline, a cutting sub comprising a cutting apparatus, a cable head adapted to connect a downhole tool to the cutting sub, and a release releasably connecting the wireli... | 10/03/2006 |
| 7111580 | Device for detecting the presence of a chemical contaminant The disclosure relates to a device for detecting the presence of a chemical contaminant. The device comprising a resilient indicator element which is biased into a first position and is anchored in the first position by means of a failure element. The failure elemen... | 09/26/2006 |
| 7086467 | Coiled tubing cutter A subsea production system includes a blowout preventer stack that is adapted to seal and contain pressure in a well. The blowout preventer stack has a passageway through which a tubular string may extend into the well. The subsea production system includes a subsea... | 08/08/2006 |
| 6997262 | Emergency cutting apparatus and method A method and apparatus for cutting one or more longitudinal members, external to a downhole tubular conduit, by pulling upward on a cutter body attached to the tubular conduit, where the longitudinal members are run between cutter knives within the cutter body. The ... | 02/14/2006 |
| 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 |
| 6789627 | Control line cutting tool and method An apparatus includes a first member, a second member releasably attached to the first member, and a control line shear mechanism disposed proximate an interface between the first member and the second member. The first and second members can each have a longitudina... | 09/14/2004 |
| 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 |
| 6526858 | Cable breakaway assembly A cable breakaway assembly is adapted for mounting within a stationary component of a communications service network to prevent damage to a feeder cable in the event that an excessive pulling force is applied to a customer cable spliced to the feeder cabl... | 03/04/2003 |
| 5720348 | Apparatus and method for cutting wire A device for cutting a wire line is disclosed. Generally, the device comprises a tubular member having an inner diameter therethrough for placement of the wire line. A power mandrel is associated with the tubular member. A housing is operatively associate... | 02/24/1998 |
| 4825953 | Well servicing system Disclosed is a wireline well servicing system for underwater wells utilizing a lubricator stack having upper and lower sections connected by a remotely operable connector. The lower lubricator section includes a remotely operable valve connectable to a we... | 05/02/1989 |
| 4817725 | Oil field cable abrading system A down-hole oil field cable abrader having an elongated abrading head pivotally connected at one of its ends to a body attachable to a tubing string. An abrading portion extends axially along the abrading head from its pivotal connection and includes a pl... | 04/04/1989 |
| 4746246 | Remotely actuated cutting assembly for broken underwater guidelines An apparatus for remotely cutting a broken guideline extending from an underwater guide post comprising a frame, a clamping mechanism for clamping the frame to the guide post in a predetermined location, a pair of opposed cutting jaws pivotally coupled to... | 05/24/1988 |
| 4738312 | Cable cutting coupling for drilling, production, well logging or other operations in wells A cable cutting sub or coupling for drilling, production, well logging or troubleshooting operations in wells, comprising a drilling pipe in which a cable is engaged. This sub allowing the cable to be severed if required comprises a tubular body in which ... | 04/19/1988 |
| 4721355 | Optical cable connector assembly including breakable link and process using same A cable connector assembly capable of mating to an armored optical cable and providing a hermetically sealed electronics cavity is described. A connector assembly provides a means for placing electronics in an electronics cavity. The electronics are capab... | 01/26/1988 |
| 4660635 | Equipment for a pipe string such as a drill-pipe string, comprising a side entry connection for passing a cable A side-entry connection for incorporation in pipe strings, such as a drill-pipe string, and for sealingly passing a cable from the inside to the outside of the pipe string is disclosed. The side-entry connection comprises a connection sub and a sleeve whi... | 04/28/1987 |
| 4653776 | Umbilical safety joint A safety joint for a control umbilical which separates the umbilical and severs internal control hoses when a predetermined tension is exceeded. The control hoses are severed by opposing cutting edges on mating slots formed by an inner cutting tube and an... | 03/31/1987 |
| 4557628 | Method and apparatus for remotely cutting broken underwater guidelines An apparatus and method for remotely cutting a broken guideline extending from an underwater guide post. The apparatus includes a frame, a clamping mechanism for clamping the frame to an annular groove in the guide post, a pair of opposed, pivotable cutti... | 12/10/1985 |
| 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 |
| 4430552 | Thermal release device A thermal release device made up of a heating element in contact with a thermally fusible connective link which upon supplying electric current to the heating element melts through the link and parts the linkage.... | 02/07/1984 |
| 4306622 | Apparatus and method for down-hole retrieval of pumping equipment An apparatus and method for retrieving a downhole pump consisting of using a cylindrical carrier member with a pivoted grasping and severing arm which is on the cylindrical carrier, to grasp and sever the cable connected to the downhole pump to permit ret... | 12/22/1981 |
| 4237972 | Well bore apparatus adapted for being releasably coupled to suspension cables In the several representative embodiments of well bore apparatus disclosed herein adapted for releasable connection to a suspension cable, a cable-cutting member is arranged within an upper portion of the well bore apparatus for parting the lower end port... | 12/09/1980 |
| 4057026 | Pyrotechnic cutter apparatus A pyrotechnic cutter for cutting an object such as a buoy-rope, tube, cable or the like and adapted to be mounted on a submarine vehicle, and including a fixed arm containing an explosive charge having a dihedral covering, and a second arm pivotally mount... | 11/08/1977 |
| 3967647 | Subsea control valve apparatus A control valve apparatus adapted to be positioned within a subsea blowout preventer stack for controlling the flow of fluid from an offshore well includes a control unit releasably latched to a valve body having tandem, normally closed valve assemblies, ... | 07/06/1976 |
