Abstract: A segmented tube hanger utilized in supporting tubing strings having the feature of allowing the sealed passage of electrical cable thru it therefore eliminating the splicing of electrical cable and the use of multi-pronged electrical connectors by using an axially slit or axially spiralled compressible and resilient tube packing.

Abstract: A lock screw arrangement for a lateral passage which intersects the longitudinal bore of a pressure vessel, wherein the lateral passage includes a first shoulder facing toward, a second shoulder facing away from the bore, includes a shaft for extending through the lateral passage with threads intermediate the inner and outer shaft ends. The inner shaft end is formed to provide a surface for engaging a member to retain it in the bore and an annular shoulder facing the first shoulder within the lateral passage. Packing abuts the second shoulder and surrounds the shaft. A nut is externally threaded for engaging with threads in the internal passage, and internal threads for engaging with the threads on the shaft whereby the nut may be engaged against the packing to seal between the passage and shaft.Seal means are carried by the nut for engaging adjacent the outer shaft end to isolate the internal nut threads and shaft threads from the environment and from internal pressure in the vessel.

Abstract: A gate valve includes a body with a flow passage therethrough and spaced annular seating members in the body surrounding the flow passage with seal means between the seating members and the body. A gate member is positioned between the seat members and has a surface to intersect and close off the flow passage through the body and has an opening for alignment with the flow passage through the body for flow therethrough. The annular seating members include an annular surface for abutting the gate with an annular teflon seal means in the surface and an annular groove also therein with sealant passage means for communicating with sealant passage means in the body for directing sealant to the groove means. Spaced projecting vertical guide surfaces are provided on the annular seating members for abutting the edges of the gate member to retain it aligned in the body. A stem is threadedly secured with a cylindrical member rotatably carried by the gate member whereby rotation of the stem raises and lowers the gate.