Patents by Inventor Ernest P. Fisher
Ernest P. Fisher has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 4630833Abstract: A molded resilient ring seal with support rings mold bonded or bonded and connected to both ends. The molded resilient material portion of the seal utilizes unique contouring to reduce internal resilient material stresses during use, enabling the seal to seal higher pressures at elevated temperatures for longer periods of time. A number of support ring configurations are also disclosed, which further enhance sealing ability of the resilient material.Type: GrantFiled: September 7, 1984Date of Patent: December 23, 1986Assignee: Otis Engineering CorporationInventors: William G. Boyle, Ernest P. Fisher, Jr.
-
Patent number: 4489743Abstract: A gas lift valve device of the differentially operated type, having a straight, non-tortuous flow passage therethrough, with a hollow valve stem providing a portion of such passage, said device having a floating seat which automatically moves to valve engaging position to check backflow, the area of said seat being larger than the area of a piston on said stem and arranged so that the valve will close at a first predetermined differential pressure and will open at a second predetermined differential pressure which is lower than the first.Type: GrantFiled: July 29, 1982Date of Patent: December 25, 1984Assignee: Otis Engineering CorporationInventors: Carlos R. Canalizo, Ernest P. Fisher, Jr.
-
Patent number: 4483543Abstract: A molded resilient ring seal with support rings mold bonded or bonded and connected to both ends.The molded resilient material portion of the seal utilizes unique contouring to reduce internal resilient material stresses during use, enabling the seal to seal higher pressures at elevated temperatures for longer periods of time.A number of support ring configurations are also disclosed, which further enhance sealing ability of the resilient material.Type: GrantFiled: January 19, 1983Date of Patent: November 20, 1984Assignee: Otis Engineering CorporationInventors: Ernest P. Fisher, Jr., William G. Boyle
-
Patent number: 4436152Abstract: An improved shifting tool connectable in a well tool string and useful to engage and position a slidable sleeve in a sliding sleeve device in a well flow conductor. The selectively profiled shifting tool keys provide better fit with and more contact area between keys and slidable sleeves. When the engaged slidable sleeve cannot be moved up and the shifting tool is not automatically disengaged, emergency disengagement means may be utilized by applying upward force to the shifting tool sufficient to shear pins and cause all keys to be cammed inwardly at both ends to completely disengage for removal of the shifting tool from the sliding sleeve device.Type: GrantFiled: September 24, 1982Date of Patent: March 13, 1984Assignee: Otis Engineering CorporationInventors: Ernest P. Fisher, Jr., William R. Welch
-
Patent number: 4432416Abstract: A side pocket mandrel designed primarily for controlling the flow of production fluid into a tubing string includes a sliding sleeve valve in the side wall receptacle for alternatively closing and opening the entry port into the receptacle. The sleeve valve is latched in its port-closing position, but is designed to enable removal from the receptacle bore for servicing; and a pulling tool is provided for removing the sleeve valve from the receptacle when desired. The sleeve is shifted to its port-opening position when a standing flow control valve is placed in the receptacle; and the standing valve has a large valve chamber and side entry and exit ports for the production fluid to provide for maximum flow. The standing valve provides a check valve into the producing zone, the valve closure member being a modified ball consisting of a cylindrical body with spherical ends and coacting with a spherical valve seat.Type: GrantFiled: February 23, 1982Date of Patent: February 21, 1984Assignee: Otis Engineering CorporationInventors: William R. Welch, Ernest P. Fisher, John H. Yonker
-
Patent number: 4428557Abstract: A single control line, surface controlled subsurface safety valve for controlling flow in a well, having a valve closure member responsive to the longitudinal movement of an operator tube disposed in the bore of the safety valve. The operator tube is moved to a position opening the valve closure member by action of a piston, housed in an annular pressure zone, which is responsive to control fluid pressure from the surface of the well. The operator tube is returned to a position closing the valve closure member by action of a resilient urging means housed in an annular chamber located above the annular pressure zone. There is no pressure differential between the bore of the safety valve and the annular chamber housing the resilient urging means.Type: GrantFiled: January 29, 1982Date of Patent: January 31, 1984Assignee: Otis Engineering CorporationInventors: John H. Yonker, Ernest P. Fisher, Jr.
-
Patent number: 4381822Abstract: A landing nipple having a port through the wall thereof which is controlled by a valve carried by a non-circular ring which ring may be moved toward circular position by introduction of a sleeve-like member into the bore through the ring to unseat the valve.Type: GrantFiled: May 11, 1981Date of Patent: May 3, 1983Assignee: Otis Engineering CorporationInventor: Ernest P. Fisher, Jr.
-
Patent number: 4378839Abstract: A subsurface safety valve is combined with a locating means for locating the safety valve as it is pumped down into the well. A locking mandrel is provided that locks the safety valve in position after it has been located by a downward force being exerted on the locking means. When it is desired to remove the subsurface safety valve a pulling tool is run in and a downward force exerted to release the locking means permitting it thereafter to be retrieved from the well by reverse circulation.Type: GrantFiled: March 30, 1981Date of Patent: April 5, 1983Assignee: Otis Engineering CorporationInventor: Ernest P. Fisher, Jr.
-
Patent number: 4362211Abstract: A locking mandrel including a pumpdown piston and flow control means in which a dog expander engages a shoulder in a landing nipple and is moved to dog expanded position to lock the locking mandrel in the landing nipple and in which the locking mandrel may be released from the landing nipple by moving the body thereof either upward or downward to shift the expander from under the dogs to permit them to retract and release the landing nipple.Type: GrantFiled: December 4, 1980Date of Patent: December 7, 1982Assignee: Otis Engineering CorporationInventor: Ernest P. Fisher, Jr.
-
Patent number: 4352366Abstract: A standing valve for controlling fluid flow through a well flow conductor. The standing valve allows formation fluids to enter the flow conductor downhole and to flow in one directin to the well surface. The standing valve functions as a check valve to prevent fluids injected into the flow conductor at the well surface from flowing out the other end of the well flow conductor. The standing valve is operated by changes in the velocity of fluids flowing through the valve. When the pressure of fluid injected into the flow conductor from the well surface exceeds a preselected value, an alternative flow path is opened within the standing valve to allow the injected fluid to flow in the other direction through the valve.Type: GrantFiled: February 5, 1980Date of Patent: October 5, 1982Assignee: Otis Engineering CorporationInventor: Ernest P. Fisher, Jr.
-
Patent number: 4294315Abstract: A landing nipple, adaptable to be made up in a tubing string having a sliding sleeve disposed in its bore for selectively providing communication of balance and control pressure fluid to the nipple bore. When the sleeve is shifted to its first, upper position, balance fluid is conducted via the nipple to a tubing retrievable safety valve placed in the tubing string below the nipple. In the event the tubing retrievable safety valve is taken out of service, a secondary safety valve can be landed in the nipple, the sleeve shifted to its downward, second position, opening sleeve ports for conducting control and balance fluids to the landed, secondary safety valve.Type: GrantFiled: November 13, 1978Date of Patent: October 13, 1981Assignee: Otis Engineering CorporationInventors: John H. Yonker, Ernest P. Fisher, Jr., David Bills
-
Patent number: 4193450Abstract: Disclosed is a surface controlled subsurface safety valve adapted to be landed in a dual line landing nipple. The safety valve is used to control well fluids conducted through the bore of a well tubing string. The valve has a control fluid pressure chamber and a balance pressure chamber along with a zone in the valve exposed to balance fluid pressure. The control fluid pressure chamber is interspersed between the balance fluid pressure chamber and the balance pressure zone, and has a system of seals associated therewith, that provide a fail-closed safety system. Tubing bore pressure, in the event of seal failure, enters the balance pressure chamber, causing the safety valve to close. This abstract of the disclosure is neither intended to define the scope of the invention which, of course, is measured by the claims nor is it intended to limit the invention in any way.Type: GrantFiled: November 13, 1978Date of Patent: March 18, 1980Assignee: Otis Engineering CorporationInventor: Ernest P. Fisher, Jr.