Abstract: An hydraulic latch for selectively securing and, when necessary, automatically releasing capillary tubing suspended in a well bore in a manner affording clearance of a subsurface safety valve through which the suspended capillary tubing is suspended prior to release.

Abstract: A body having a bore therethrough for insertion of capillary tubing. A first means slidably coupled into the bore of the body frictionally restrains movement of the tubing by hydraulically engaging the periphery of the tubing with an elastomeric compressible sealing member. A second means slidably coupled into the bore of the body prevents movement of the tubing in the bore of the body by hydraulically actuating a plurality of slips to impart select engagement of the periphery of the tubing for its securement therein. A third means suspends the tubing in the bore of the body by manually engaging a plurality of suspension slips around the periphery of the tubing.

Abstract: A body having a bore thereThrough for insertion of capillary tubing. A first means slidably coupled into the bore of the body frictionally restrains movement of the tubing by hydraulically engaging the periphery of the tubing with a compressible elastomeric sealing member. A second means slidably coupled into the bore of the body prevents movement of the tubing in the bore of the body by manually engaging the periphery of the tubing with a compressible elastomeric sealing member. A third means suspends the tubing in the bore of the body by manually engaging a plurality of suspension slips around the periphery of the tubing.

Abstract: A body having a bore therethrough for insertion of capillary tubing. A first means slidably coupled into the bore of the body frictionally restrains movement of the tubing by hydraulically engaging the periphery of the tubing with an elastomeric compressible sealing member. A second means slidably coupled into the bore of the body prevents movement of the tubing in the bore of the body by hydraulically actuating a plurality of slips to impart select engagement of the periphery of the tubing for its securement therein. A third means suspends the tubing in the bore of the body by manually engaging a plurality of suspension slips around the periphery of the tubing.

Abstract: A wellhead for use with a surface mounted pumping unit operating a rod string extend to a downhole pump in a well. The wellhead includes a body having a bore for a rod string, a support rod assembly moveable across the bore for coupling with a rod string having a coupling flange to provide a rod string hanger and a releaseable lock operable with the rod string. The wellhead also comprises a hydraulic seal in the body around the bore to seal with a rod string through the bore. Blowout preventer rams in the body for closing off around the rod string through the body and closing off the bore through the body when no rod string is present. A securing structure at the opposite ends of the body secures the wellhead with a rod string operator above the wellhead and to secure the wellhead with a casing flange on a well.

Abstract: A misaligning wellhead system for use on the surface end of well production tubing in a well produced by a pump driven by a pumping unit operated polished rod extending through the wellhead to the pump. The wellhead system includes a flange for connection of the system to the surface end of the production tubing, a blowout preventer above the flange, a flow tee above the blowout preventer for directing well fluids into a flowline, and a floating tubular body supporting a stuffing box and a flapper valve for torsional and lateral movement relative to the longitudinal axis through the wellhead body as the polished rod reciprocates to compensate for misalignment of the pumping unit relative to the wellbore centerline.

Abstract: A leak catcher for use on a pumping well around a polished rod operating a downhole pump in the well including an annular drip bowl connected with a base securable to the upper end of a well casing around a polished rod, a drain line fitting opening into a side of the drip bowl, a leak collection well formed in the bottom of the drip bowl, a horizontal liquid level switch mounted to a side of the liquid collection well, a drain valve mounted horizontally through a side of the liquid collection well, a removable hood securable to the drip bowl, and a polished rod lubricator assembly secured in the top of the hood around a polished rod. The hood may be either a solid cylindrical member formed of opaque metal or transparent plastic or may include hinged doors for access into the leak catcher without removal of the hood.

Abstract: A blowout preventer for use on wells and especially adapted to use on a pumping well during a steam flood operation including an upper housing having oppositely disposed rams for extension and retraction between the sealing and non-sealing with a longitudinal member through the blowout preventer into a well, such a polished rod of a pump, a lower housing connected with the upper housing, and a heat responsive seal assembly in the lower housing for sealing with the polished rod during steam flooding, the heat responsive seal assembly including an elastomer seal plug designed to swell to form a seal with the polished rod during steam flooding and including means to compress the seal plug after steam flooding to return the plug to an original non-sealing volume and size below the steam flooding temperature.

Abstract: A wellhead for a polished rod pumping unit to provide emergency closure of the bore through the wellhead in the event of breakage of the polished rod. The valve assembly includes a flapper valve mounted on a swivel pin for movement between a vertical open position and a horizontal closed position across the wellhead bore. The flapper valve is spring biased toward the open position. A well pressure responsive cylinder and piston assembly is mounted on the side of the wellhead with an operating rod into the wellhead against the flapper valve to move the valve from the open position to a horizontal closed position. The piston is exposed to well pressure on the one side urging the piston outwardly to the valve open position and a spring engages the piston on the opposite side biasing the piston inwardly toward the valve closed position when well pressure is not sufficient to keep the spring compressed. One form of the wellhead includes a packing assembly for sealing around the polished rod.

Abstract: A well pump sucker rod guide which is a tubular integral body element formed of an elastic minimum friction type material and provided with a longitudinal bore formed along the longitudinal axis of the body, a transverse mounting slot opening from a side of the body into the bore dividing the body into opposite end portions, and a longitudinal mounting slot in each end portion extending radially inwardly into the bore and opening at one end through an end of the body and at the other end into the transverse slot, one of the longitudinal slots extending in the opposite radial directions from the other longitudinal slot, and each said slot being defined by radially outwardly diverging guide walls which also diverge toward the transverse mounting slot. The guide is mounted on sucker rod sections to centralize the reciprocating rod in a production tubing in which a pump is mounted and operated by the rod.