Abstract: A single ram wireline BOP mechanism is disclosed which incorporates opposed rams having elastomeric packing capsules and outer elastomeric seals for accomplishing sealing about a wireline extending through the BOP body. The packing capsules cooperate to define a centrally oriented grease chamber into which is injected grease from an externally accessible grease fitting so as to establish grease sealing about the wireline. Grease pressure from the grease chamber is ducted through the BOP rams and into inner cylinders where it acts upon the pressure responsive area of a free piston contained therein. The grease pressure develops a force on the free piston which acts against the ram to enhance the closing force of the ram.

Abstract: An orienting intercarrier assembly is provided for oriented interconnection and locking of tubing conveyed perforating guns. The apparatus incorporates upper and lower intermediate adapter sections including tapered guide surfaces that correct for axial misalignment as the adapters are stabbed into sealed assembly. The adapters are also provided with alignment pins and rotational alignment guide surfaces that enable the adapters of the intercarrier assembly to be properly assembled and locked only when precise rotational orientation therebetween has been established. The apparatus also incorporates a locking mechanism enabling the adapters to be securely locked in assembly and to be retained against inadvertent disassembly.

Abstract: A single ram unidirectional wireline BOP system is provided having both mechanical and hydraulic sealing capability. A BOP body having a vertical flow passage and intersecting horizontal ram passages includes a single pair of opposed rams and appropriate actuators for moving the rams into sealing engagement with a wireline extending through the vertical flow passages. Each of the rams incorporates an elastomeric peripheral seal extending about a major portion of the periphery thereof and disposed for sealing engagement with internal wall surfaces of the body. The sealing system of the rams also incorporates a pair of vertically spaced inner elastomeric seals disposed for sealing engagement with one another and with the wireline. Between the upper and lower inner seals in the closed positions of the rams, is defined a small, centralized grease chamber through which the wireline extends.

Abstract: A pressure containing wireline safety mechanism for wireline assemblies incorporates a tubular body for attachment between the lubricators and stuffing box of the wireline assembly. An inner housing is releasably retained within the tubular body and is provided with a wireline cutter to cut the wireline and release a wireline tool string that is stuck in a position blocking closure of the wellhead saftey valves and the wireline blowout preventor. The inner housing also incorporates a valve mechanism that automatically forms a pressure containing seal after the wireline has been cut to thus permit the stuffing box to be removed and another wireline assembly installed above the first wireline assembly for removing the inner housing and releasing the stuck wireline tool string.

Abstract: A mechanical latching device for repeatable latching and unlatching of downhole well tools is adapted for use in a mandrel interconnected with a tubing string of a well, the mandrel forming a downwardly directed internal shoulder. The latch mechanism incorporates a fishing neck adapted for interconnection with the downhole tool. The fishing neck is disposed in upstanding generally centralized relation within the mandrel. A collet member which may be a component part of a well service tool or which may be a component part of the latch mechanism defines pulling shoulders at the free extremity of collet fingers defined thereby. A latch retainer is disposed in movable relation about the fishing neck and is movable between latched and unlatched positions relative to the fishing neck. In the latched position the latch retainer provides external support for the collet fingers to maintain the collet fingers in latching interengagement with a pulling flank.

Abstract: A mechanical latching device for repeatable latching and unlatching of downhole well tools is adapted for use in a mandrel interconnected with a tubing string of a well, the mandrel forming a downwardly directed internal shoulder. The latch mechanism incorporates a fishing neck adapted for interconnection with the downhole tool. The fishing neck is disposed in upstanding generally centralized relation within the mandrel. A collet member which may be a component part of a well service tool or which may be a component part of the latch mechanism defines pulling shoulders at the free extremity of collet fingers defined thereby. A latch retainer is disposed in movable relation about the fishing neck and is movable between latched and unlatched positions relative to the fishing neck. In the latched position the latch retainer provides external support for the collet fingers to maintain the collet fingers in latching interengagement with a pulling flank.