Abstract: In a combined liquid natural gas and compressed natural gas fueling station, liquid natural gas is stored in a cryogenic tank and dispensed to vehicles on demand. Compressed natural gas is produced on demand from the liquid natural gas by a high-efficiency pump and vaporizer system and dispensed directly to vehicles or stored for later dispensing. For greater efficiency, the pump and vaporizer system is powered by combustion of natural gas, including gas bled off to relieve pressure from the cryogenic tank.

Abstract: There is provided an improved coiled tubing injector for injecting and withdrawing a length of flexible, cylindrical tubing into and from a well bore. The improved injector comprises first and second sets of gripper shoes, and drive mechanism for moving the sets of gripper shoes around first and second endless paths, respectively. The endless paths include parallel sections disposed on opposite sides of a length of the tubing. Within these parallel sections, the gripper shoes are pressed against the tubing with sufficient force to hold the tubing therebetween. Each gripper shoe includes a base portion connected to the drive mechanism and at least two substantially nondeformable gripper elements, each having cylindrical gripping surfaces corresponding to the outer surface of the tubing. A body of elastomeric material connects the gripper elements to the base portion and permits movement of the gripper elements between open and closed positions.

Abstract: A cryogenic fluid pumping and vaporization system utilizes a heat engine to drive a cryogenic fluid pump, a coolant pump, a lube oil pump and a dynamometer, the cryogenic fluid pump and the coolant pump being driven through a hydraulic drive system, while the lube oil pump, hydraulic pump and the dynamometer are mechanically driven by the engine. Operation of the coolant pump and cryogenic fluid pump flows coolant fluid through a coolant flow circuit and flows cryogenic fluid through a cryogenic fluid flow circuit, each of these two circuits being operatively connected to a process fluid heat exchanger which transfers coolant heat to the cryogenic fluid to vaporize it. Heat from the hydraulic drive system and a lube oil flow circuit associated with the lube oil pump is transferred to the coolant flow circuit via suitable heat exchangers interposed therein. Exhaust gas heat generated by the engine is also transferred to the coolant through an exhaust gas heat exchanger.

Abstract: Apparatus for injecting tubing into a subterranean well comprising a support frame for a pair of opposed endless conveyor chains fitted with tubing gripper blocks for gripping and conveying the tubing into and out of the well. The conveyor chains are supported by movable ramp members which are each connected to opposed hydraulic cylinder actuators hydraulically interconnected in parallel so that the ramp members may be moved toward and away from each other to uniformly vary the gripping force of the conveyor chains on the tubing. The endless conveyor chains are trained over idler sprockets which are interconnected by opposed hydraulic cylinder actuators for tensioning the chains with substantially equal tensioning forces. The conveyor assembly is mounted on a frame comprising two spaced apart metal plates which are reinforced by spaced apart vertical column members supported on a base.

Abstract: A triplex plunger pump for liquid cryogen service includes a power end frame comprising a casing formed of welded plate sections and elongated tubular members interconnected to form a main bearing support structure which minimizes the transmission of pump reaction forces to the casing outer walls. The power end frame is provided with removable guide sleeves for supporting respective cylindrical crossheads. The sleeves are retained in the power end frame in bores formed in spaced apart support plates. The crank or eccentric shaft is a multipart assembly including a cylindrical shaft having spaced apart splined sections which are interfittingly engaged with splines formed on removable eccentrics. The shaft main support bearings and the eccentric bearings are cylindrical roller bearing assemblies.

Abstract: A hydraulic intensifier comprising a stationary working fluid plunger connected to a power fluid cylinder and piston arrangement disposed around the plunger. The power fluid piston is disposed around and integral with a working fluid cylinder member which is reciprocable with respect to the working fluid plunger to displace working fluid from the intensifier. A head member arranged at one end of the plunger includes a cavity for receiving the working fluid discharge valve which is coaxial with the working fluid plunger and in communication with a working fluid cylinder chamber by way of an elongated passage within the plunger. The working fluid inlet valve is disposed in a removable cover member attached to the head of the working fluid cylinder. The power fluid cylinder is removably connected to the head member by a releasable flange clamping connector assemblies. The inlet and discharge valves are accessible through valve covers which are held in assembly with the heads by similar connector assemblies.

Abstract: An extendable utility boom assembly for assisting fire-fighting operations performed from a semi-submersible service vessel upon an offshore platform is disclosed. The boom assembly is moved to operating position by means of a carriage assembly which is mounted for movement along a track secured to the deck of the service vessel. Orientation of the boom assembly in azimuth and pitch is provided by a supporting frame which is pivotally mounted on the carriage assembly for angular movement through a horizontal plane, and a trunnion which is pivotally mounted on the supporting frame for angular movement through a vertical plane. An elongated utility boom is supported by roller bearing elements for axial movement through the trunnion. A first linear actuator is interconnected between the carriage assembly and supporting frame for displacing the supporting frame through the horizontal plane.