Abstract: A flowline power generator especially adapted for use on a conduit or flowline carrying petroleum or hydrocarbon products is disclosed. A valve body incorporated in the flowline redirects at least a portion of the fluid flowing through the flowline into engagement with a turbine used to drive an electrical generator. A gate valve is provided for bypassing the turbine to permit all of the flow in the conduit to bypass the power generator. In the bypass configuration, the power generator can be repaired or completely removed. The valve body can be incorporated into the well with no power generator attached, and power generators can be subsequently installed at prescribed locations along the conduit.

Abstract: This invention relates to an improved gate valve having floating seal elements which are back-relieving and reversible for long-term permanent sealing under varied pressure conditions. The sealing elements are mounted in unrestrained relation in juxtaposed recesses in the fluid passage facing the movable gate with annular gaskets facing both the gate and the recesses for improved self-aligning sealing engagement therewith. The sealing elements and their annular gaskets may be reversed, interchanged, or readily replaced as desired, the valve structure being especially useful for inherently fail-safe slab type gate valves.

Abstract: A seal assembly containing a plurality of nonelastomeric sealing elements for use in a valve actuator is disclosed. The valve actuator can be incorporated into a fluid transmission conduit at the surface of a producing oil or gas well. A spring member radially biases one sealing element into engagement with concentric tubular members. Additional sealing elements are radially expandable when subjected to axial compression to close any gap along the surfaces of the concentric tubular members to provide extrusion resistance, greater sealing performance, and fire resistant capability. The seals can be used under hostile conditions, such as extreme temperature and in the presence of corrosive fluids and corrosion inhibitors.

Abstract: A fluid actuated pilot assembly employing a cantilevered spring member which is mounted to apply a force to a sensing piston in opposition to the force applied by the sensed fluid pressure. Upon the occurrence of the pressure of the fluid being sensed exceeding the force of the cantilevered spring member, the sensing piston is moved to initiate a control function.