Hydril Company

Tosh Miyagishima

James D Mott

William Lyle Carbaugh

Raymond Wieveg

Joseph Puntar

William R Hadsell

Calvin Motoda

An improved seal for a blowout preventer ram which can be moved into and out of engagement with a length of pipe and includes intersecting recesses formed in the outer surfaces of the ram body for accommodating seal for forming a pressure-tight seal around the length of pipe and between the ram and at least a portion of a housing in which the ram moves when the ram engages the pipe. The seal includes a front seal with a curved portion shaped to engage the length of pipe and a body portion formed of an elastomeric material shaped to fit within one of the recesses in the ram. An insert in the body portion is formed of a deformable material with low friction properties and positioned to engage the pipe when the ram is in its engaging position. The insert is held between a pair of rigid retainer plates oriented perpendicular to the pipe. The seal engages a second top seal located in the other recess and pushes it outwardly into sealing positions when force is exerted on the front seal.

Front packer seal for ram blowout preventer

A composite seal is adapted to fit in a groove formed in the outer surface of a first body and project outwardly to engage a second body spaced apart from the first body and form a fluid-tight seal between the two bodies. The seal includes an elongated raised portion which engages the second body and is formed of a deformable material. The seal further includes a pair of retainer portions formed of a material stiffer than the raised portion, the raised portion being formed integral with and located between the retainer portions. The raised portion projects outwardly beyond the outer ends of the retainer portions. The seal also includes recesses between the raised portion and both retainer portions extending below the outer ends of the retainer portions so that when the second body moves closer to the first body the material forming the raised portion will deform and flow into the recesses. The respective outer ends of the raised portion and the retainer portions are spaced apart a sufficient distance so that when one of the first and second bodies moves laterally relative to the other body the material of the raised portion will deform and cause material to fill the recess on that side of the raised portion and the raised portion to fill the space between the second body and the outer end of the appropriate retainer portion without flowing beyond the retainer portion.

Composite seal

An inside blowout preventer well tool includes an elongated body threaded at both ends and including an axial opening. A flapper is pivotally mounted on a side of the opening and movable between a lower-open position and an upper-closed position. A downwardly-facing valve seat is formed around the opening, the flapper engaging the seat in the upper-closed position. A spring urges the flapper toward the seat and a piston is movable in the opening between an upper position, where the lower end of the piston is above the valve seat, and a lower position, where the piston encases the flapper and holds it in the lower-open position. The piston is normally urged toward its upper position, the piston being shaped so that when the internal pressure of drilling mud normally circulating through the opening is greater by a predetermined amount than pressure outside the body, the pressure differential will overcome the force urging the piston upwardly and move the piston to the lower position. The piston is also responsive to fluid pressure outside the body so that the piston will automatically be moved to its upper position when the pressure differential is reduced by a predetermined amount.

Inside blowout preventer well tool

A valve assembly for preventing a column of drilling fluid from spilling out of the lower end of a kelly includes an elongated body which has an axial opening and is threaded at both ends. A cam is rigidly mounted in the bore and a hollow piston in the opening is mounted for axial movement relative to the cam, the piston being shaped so that fluid pressure in the body will exert a downward force on the piston. A valve element is pivotally mounted in the piston (the piston inner surface defining a valve seat) and movable between a lower-closed position when the valve element is above the cam and engages the seat to an upper-open position where the cam engages the valve element and holds it away from the seat. A spring urges the valve element toward the closed position and the piston is urged upwardly in the bore so that the valve element is normally in its closed position. When a sufficient downward force caused by fluid pressure in the body is applied to the piston to overcome the upward force against the piston, the piston will move down causing the cam to engage and raise the valve element to its open position, the piston moving upwardly and the valve element returning to its closed position when the downward force is removed.

Internal mud saver valve

Well line strap connection

A surface-controlled subsurface safety valve apparatus and method of utilizing the safety valve in through-the-flowline serviced wells. Both the valve frame and valve operator are provided with ball and socket universal joints to enable passage of the safety valve past restrictions in the flowline resulting from bends and curves in the flowline by flexing the safety valve in moving to and from the subsurface operating location.

Growing community of inventors

Los Angeles, CA, United States of America

Tosh Miyagishima