Halliburton Energy Services, Inc.

Ewan Ogilvie Robb

Jeremy Buc Slay

Winston James Webber

Roderick B Falconer

Michael Gardner

James Dan Vick, Jr

David L Reesing

Peter D W Inglis

Jeffrey Wythe Huggins

Jeffry W Huggins

Peter DW Inglis

An annular safety valve sealing package comprises an annular safety valve comprising a tubular housing; a first annular sealing element comprising a first elastomeric material and disposed about the tubular housing of the annular safety valve; a second annular sealing element comprising a second elastomeric material and disposed about the tubular housing of the annular safety valve adjacent the first annular sealing element; and a third annular sealing element comprising a third elastomeric material and disposed about the tubular housing of the annular safety valve adjacent the second annular sealing element and on an opposite side of the second annular sealing element from the first annular sealing element. At least two of the first elastomeric material, the second elastomeric material, or the third elastomeric material have different compositions.

Constructed annular safety valve element package

An annular safety valve sealing package that is suitable for use in the presence of an acid gas and that is capable of retaining its material properties when the annular safety valve is retrieved is provided. The annular safety valve sealing package includes an annular safety valve having a tubular housing, a first annular sealing element including a first elastomeric material and disposed about the tubular housing, a second annular sealing element including a second elastomeric material and disposed about the tubular housing, and a third annular sealing element including a third elastomeric material and disposed about the tubular housing on an opposite side of the second annular sealing element from the first annular sealing element. At least two of the first elastomeric material, the second elastomeric material, or the third elastomeric material have different compositions.

A ball valve comprising a housing comprising a fluid passage, a first seat surface, a second seat surface, and a ball rotatably movable within the housing between an open position allowing flow through the fluid passage of the housing and a closed position preventing flow through the fluid passage of the housing, wherein the ball contacts the first seat surface and the second seat surface to form one or more seals within the ball valve, wherein the ball comprises a fluid passage and a fluid path, wherein the fluid path fluidly connects a space between the first seat surface and the second seat surface with the fluid passage of the housing, with the fluid passage of the ball, or both, when the ball is in the open position.

Pressure equalization for dual seat ball valve

Apparatus and associated methods are provided for remotely actuating a plug apparatus in a subterranean well. In a described embodiment, a plug apparatus has a plug member blocking fluid flow through one of two flow passages of the plug apparatus. A predetermined fluid pressure applied to one of the flow passages permits the plug member to be expended from the plug apparatus.

Remote actuated plug apparatus

Remote actuated plug method

A plug apparatus is provided which includes a dispersible plug member and a fluid barrier. In one embodiment described herein, a fluid barrier is utilized to prevent contamination of fluid contained in a plug apparatus. The fluid is thus available for use in dispersing a plug member of the plug apparatus, regardless of the types of other fluids present in a well in which the apparatus is installed. Various configurations of fluid barriers are also provided.

Growing community of inventors

Brechin, United Kingdom

Ewan Ogilvie Robb