George E Conover deceased: Well control apparatus. Lynes, Jack W Hayden, March 2, 1976: US03941190 (68 worldwide citation)

A tool for running on a well string such as a drill string in a well bore carries inflatable packer means to close off the well bore adjacent the tool. The tool includes a body having a longitudinal bore therethrough with seating means and shock absorbing means for absorbing the shock of seating a b ...

Silcox William H: System for operating hydraulic apparatus. Chevron Research Company, Freeland Jr R L, Gibeau C J, November 25, 1975: US3921500 (37 worldwide citation)

This invention is directed to a system for operating apparatus which includes submerged hydraulically actuated devices and has provision for cycling the hydraulic fluid continuously in a closed loop from a high pressure side from which the actuated device is energized to a low pressure side which re ...

Maroney Harold W, Hathcote Lester R, Sparkman Thomas W: Subsurface well control apparatus and method. June 5, 1973: US3737845 (24 worldwide citation)

A new and improved method and apparatus for reliably and accurately controlling one or more operations of subsurface well drilling and well control equipment, and for reducing the likelihood of inadvertent actuation of such apparatus from stray or other undesired or spurious signals, is disclosed.

Benton F Baugh: Multi-pressure, single line supply system. Vetco Offshore, Pravel Wilson & Gambrell, July 19, 1977: US04036247 (12 worldwide citation)

A system for conveying fluid from a single subsea supply conduit to provide a fluid supply for each of a plurality of subsea well control apparatus requiring fluid supplies at different pressure levels. A fluid receiver receives fluid under pressure from the single subsea supply conduit, and a regul ...

Brown Cicero C: Well control apparatus. Torres & Berryhill, November 19, 1974: US3848669 (7 worldwide citation)

An assembly for regulating the flow of effluents through a multiple conduit well may comprise: a support assembly for releasably supporting a plurality of conduits in the well; a sensing device connected to the support assembly and responsive to one or more predetermined conditions at the well to au ...

Eric Owens: Well cap systems. Stone Volk Patent Group, Martin L Stoneman, June 19, 2007: US07231968 (5 worldwide citation)

A system for capping the upper opening of a well having an accommodation for a remotely-located control device. More specifically, a well cap system for a water-well having a pipe casing that permits one or more well control apparatus to be located within the well cap. The system is a two-part assem ...

Well control apparatus. Lynes, March 30, 1978: GB1505194-A (3 worldwide citation)

1505194 Boring earth; wells &c. LYNES INC 16 April 1975 [18 Nov 1974] 15557/75 Heading E1F Apparatus for controlling wells during drilling operations includes a body 12 (Fig. 2) for connection in the drill string, the body having a bore 16, an inflatable packer 14 carried by the body 12 for sealing ...

Jeffrey C Edwards, Ray Johns, Robert D Buchanan: Well control apparatus. Exploration and Production Services, Brady O Boyle & Gates, March 16, 1993: US05193619 (2 worldwide citation)

Apparatus for the venting and isolation of an oil well test tool drill string comprises reference pressure gas release apparatus having two spaced pistons (7, 11) located at opposite ends of the reference gas chamber (10) and blocking both a gas vent (17) to annulus and a hydraulic liquid passageway ...

Ivar Kjøsnes, Nils Lennart Rolland: Apparatus and method for controlling pressure in a borehole. STATOIL PETROLEUM, Birch Stewart Kolasch & Birch, May 8, 2018: US09963947

There is described a technique for drilling and controlling the fluid pressure of a borehole (2, 102) during drilling of the borehole. In embodiments of the invention, drill pipe (5) may be arranged in said borehole, the pipe being configured to provide drilling fluid in the borehole. Sealing means ...