Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 5293551 | Monitor and control circuit for electric surface controlled subsurface valve system A control system for applying power to a solenoid operated valve in a well completion within a borehole. The control system includes a programmable power supply for selectively applying electric power to a solenoid coil of the valve. The control system op... | 03/08/1994 |
| 5275038 | Downhole reeled tubing inspection system with fiberoptic cable A system for the inspection of a well borehole and the formation around the borehole. The system includes a pair of concentric reeled tubings for injecting a pair of fluids into a wellbore through a wellhead, one of said fluids being an optically transpar... | 01/04/1994 |
| 5244046 | Coiled tubing drilling and service unit and method for oil and gas wells A coiled tubing service unit and method for oil and gas wells including a string of components extending above ground in coaxial alignment with said well and including an injector for injecting coiled tubing into the well and a sealing unit for preventing... | 09/14/1993 |
| 5244044 | Catcher sub An improved catcher sub has a longitudinal flow passage and a collet slidably mounted around the flow passage in the sub housing. The collet has a number of fingers and each finger has a resilient seal segment. The collet is held and supported in up finge... | 09/14/1993 |
| 5226483 | Safety valve landing nipple and method A safety valve landing nipple selectively provides communication between a surface control line and the internal bore of said landing nipple by use of a rotary member. A rotary shifting tool is used to rotate the rotary member so that a cutting means shea... | 07/13/1993 |
| 5219025 | Method and apparatus for gravel packing a well through a tubing string A gravel packing assembly which may be utilized in a method to gravel pack a well through the tubing string. The gravel pack assembly includes a crossover assembly which facilitates the pumping of a gravel slurry into a wellbore, and the taking of the flu... | 06/15/1993 |
| 5211241 | Variable flow sliding sleeve valve and positioning shifting tool therefor A sliding sleeve valve useful in a flow conduit to control and vary area of openings open for flow through the valve. The valve has a sleeve having a through flow passage and the sleeve is moveable between open, intermediate and closed positions. When the... | 05/18/1993 |
| 5205355 | Subsurface safety valves and method and apparatus for their operation Method and apparatus for pressurizing the top of the valve member of a subsurface safety to equalized pressure thereacross and assist in opening the valve. The apparatus includes a chamber filled with fluid under pressure which is admitted in to the space... | 04/27/1993 |
| 5197773 | Running and pulling tool An improved running or pulling tool which automatically connects to a lock mandrel when the improved tool dogs are inserted into a lock mandrel fishing neck. The dogs are releasably positioned for automatic connection by lower shear members. The tool is r... | 03/30/1993 |
| 5195585 | Wireline retrievable jet cleaning tool A wireline retrievable jet cleaning tool (10) comprising an adapter axle (12), a longitudinally extending axle (16), and a nozzle housing (14) rotatably mounted around the axle (16), the nozzle housing having at least two longitudinally spaced-apart nozzl... | 03/23/1993 |
| 5193614 | Cable anchor assembly A cable anchor assembly (16) for an inverted, cable deployed submersible pump (28) that comprises a cable tensioning device (18) adapted to preload the multwire rope members (38) of the power cable (30). The cable tensioning device (18) comprises threaded... | 03/16/1993 |
| 5191173 | Electrical cable in reeled tubing An electrical cable assembly (10) comprising a cable core (12) and filler layer (16) encased in longitudinally welded reeled tubing (23) so as to restrict relative axial and longitudinal motion between the cable core (12) and reeled tubing (23). Small-dia... | 03/02/1993 |
| 5188182 | System containing expendible isolation valve with frangible sealing member, seat arrangement and method for use An isolation valve for a downhole well completion system having a one piece frangible, ceramic sealing element and an extrusion resistant resiliently faced valve seat and a method for the use thereof is presented. Said sealing element is biased to the clo... | 02/23/1993 |
| 5183115 | Safety valve Disclosed is a new and novel poppet type safety valve useful in flow conduits in fluid storage well systems. The safety valve is programmable to automatically close at various predetermined ratios of production mass flow rate-ambient pressure to prevent u... | 02/02/1993 |
| 5183114 | Sleeve valve device and shifting tool therefor Disclosed is a sliding sleeve valve and a selective pressure operated shifting tool engageable in the selected sleeve valve for shifting the valve sleeve between open and closed positions. The sleeve valve is connectible in a well conduit and is especiall... | 02/02/1993 |
| 5181569 | Pressure operated valve In the disclosed pressure operated valve, a sleeve valve controlling flow between outside and inside the valve is releasably connected in a housing when the sleeve valve is in open position. Pressure on a ball sealingly engaging the sleeve valve operates ... | 01/26/1993 |
| 5180016 | Apparatus and method for placing and for backwashing well filtration devices in uncased well bores An earth well completion apparatus and method wherein a work string equipped for jet washing downhole filtration devices, such as well screens and for back washing said downhole filtration devices and containing multiple ball catcher subs which utilize th... | 01/19/1993 |
| 5179973 | Valve with pressure assisted closing system A valve employing a coupling disk to rotate the valve member so that rotative force is applied to the valve member in a direction away from the seat during opening of the valve and/or in a direction toward the seat during closing of the valve. Closing for... | 01/19/1993 |
| 5176164 | Flow control valve system A flow control valve system for production of wells such as by gas lift including a downhole valve electrically or pressure pulse controlled from the surface including a valve having apparatus for controlling the flow rate through the valve by varying the... | 01/05/1993 |
| 5172717 | Well control system An electrically actuated downhole system for controlling and monitoring the flow of gas from a gas lift petroleum well in which a borehole penetrates at least two spacially separated geological production zones, and at least two strings of parallel tubing... | 12/22/1992 |
| 5170845 | Subsurface safety valves and method and apparatus for their operation Method and apparatus for pressurizing the top of the valve member of a subsurface safety to equalized pressure thereacross and assist in opening the valve. The apparatus includes a chamber filled with fluid under pressure which is admitted in to the space... | 12/15/1992 |
| 5159981 | Flapper valve A flapper valve assembly when closed permits flow through in one direction and prevents flow in the opposite direction. When open, two way flow may occur and the flapper valve member is biased toward closed position, to sealingly engage an annular seat, b... | 11/03/1992 |
| 5152343 | Reeled tubing gas lift mandrel A gas lift valve mandrel especially adapted for mounting on reeled tubing used in a well including a mandrel body in at least two sections comprising a gas lift valve adapter and a clamp which are secured together around the tubing, the adapter including ... | 10/06/1992 |
| 5145228 | Running and pulling tool A running and pulling tool is disclosed which is releasably connectible to a fishing neck on a well tool. The running pulling tool has an elongate mandrel on which a connector having dogs is slidably mounted for connecting to and releasing the dogs from a... | 09/08/1992 |
| 5141023 | Flow actuated safety valve A retrievable subsurface safety valve positioned in a well conduit is actuated to close by a predetermined flow rate through the safety valve. A valve member having a sealing surface is moveable by flow to sealingly engage an annular seat in the valve, cl... | 08/25/1992 |
| 5133404 | Rotary running tool for rotary lock mandrel A locking system utilizing metal seals for sealing and a rotary lock mandrel which is rotated to lock by a rotary running tool in a landing nipple in a well conduit. The lock mandrel has a metal sealing surface sealingly engageable with a metal seat in th... | 07/28/1992 |
| 5119875 | Hydraulically actuated lock system A system for sealing and anchoring reeled tubing in a landing nipple in well tubing. An hydraulically actuated lock mandrel having a locator is connected on the reeled tubing and lowered inside the tubing and into the landing nipple. The lock mandrel seal... | 06/09/1992 |
| 5115861 | Tubing guide A tubing guide provides a window for installing or removing equipment on a tubing. The guide has pipe guards which are mounted for swinging movement to and away from support position and provides for easy installation and removal of inserts in the upper a... | 05/26/1992 |
| 5107441 | System for evaluating the flow performance characteristics of a device A system for determining the flow performance of a valve by first measuring certain flow parameters of the valve with the stem fixed in a plurality of different positions between full open and full closed and then calculating a value of flow coefficient f... | 04/21/1992 |
| 5096209 | Seal elements for multiple well packers Seal elements for use on well packers having multiple mandrels for sealing between the packer and the inner wall of a well pipe. The seal elements (center elements and/or end elements) are provided with voids therein for controlling the stresses created i... | 03/17/1992 |
| 5095994 | Flow actuated safety valve with retrievable choke and metal seals A safety valve for use in a well conduit which is automatically actuated to close when production flow impingement on a retrievable flow choke in the safety valve operating tube is sufficient. The safety valve utilizes all metal to metal seals and include... | 03/17/1992 |
| 5094294 | Well pump assembly and packer A well pump assembly suspended by a cable from the surface. The assembly includes a subsurface safety valve and a packer. The packer is hydraulically set and released.... | 03/10/1992 |
| 5094340 | Gripper blocks for reeled tubing injectors An improved gripper unit for use in an injector for handling coil tubing, pipe, rod, cable, or similar elongate objects, this gripper unit being provided with gripping surfaces which contact the coil tubing in V-block fashion and thus will grip such tubin... | 03/10/1992 |
| 5090481 | Fluid flow control apparatus, shifting tool and method for oil and gas wells A fluid flow control apparatus, shifting tool and method for oil and gas wells in which a sliding sleeve valve is connected in a string of well tubing in a wellbore casing. The sliding sleeve valve functions to selectively control fluid communication betw... | 02/25/1992 |
| 5086839 | Well packer A well packer for sealing an annular space within a well bore around a tubing string including a tubular mandrel, an expandable seal assembly on the mandrel for sealing around the mandrel with a well bore wall, a slip assembly on the mandrel for releasabl... | 02/11/1992 |
| 5082061 | Rotary locking system with metal seals A locking system utilizing metal seals for sealing and a rotary lock mandrel which is rotated to lock by a rotary running tool in a landing nipple in a well conduit. The lock mandrel has a metal sealing surface sealingly engageable with a metal seat in th... | 01/21/1992 |
| 5080125 | Heat releasable weldment for manual opening jacks and method of field retrofitting A heat releasable weldment for a mechanical opening jack used in combination with fluid powered valve actuators to release said manual opening jack in the event of fire comprising grooved inner and outer members which cooperate to form a eutectic chamber,... | 01/14/1992 |
| 5070941 | Downhole force generator A hydraulic well tool for running into a flow conduit of a well on a handling string, such as reeled tubing or jointed pipe, for generating and applying an axial force to an object in the well, the well tool including an anchoring mechanism actuatable by ... | 12/10/1991 |
| 5070595 | Method for manufacturing electric surface controlled subsurface valve system A solenoid operated valve system for petroleum production wells including a solenoid operated valve securable in a well bore connected to the lower end of a tubing string extending to the surface. The valve of the system includes an outer housing, an inne... | 12/10/1991 |
| 5069242 | Gas lift valve utilizing a diaphragm pilot A pilot operated gas lift valve utilizing a diaphragm formed of polymeric or elastomeric material and exposed to lift gas pressure on one side and atmospheric pressure on the other side, the diaphragm being able to withstand very high differential pressur... | 12/03/1991 |
