Abstract: A method for manufacturing a joint pipe element (300) of a well system includes providing (1900) an outer pipe (340) having a bore (341); providing (1902) an inner pipe (330) having a bore (331); placing (1904) the inner pipe (330) in the bore (341) of the outer pipe (340); and connecting (1906) the inner pipe (330) to the outer pipe (340) with a connecting mechanism (360) so that a rotational torque is transferred from the outer pipe to the inner pipe.

Abstract: A method for artificial gas lift of a fluid from a well includes lowering a tubing system into the well, wherein the tubing system includes an inner tubular string, and an outer tubular string disposed concentrically around the inner tubular string; based on a flow amount of the fluid from the well, selecting an artificial gas lift process; reconfiguring the tubing system, while in the well, to implement the selected artificial gas lift process; and lifting the fluid to the surface with the selected artificial gas lift process.

Abstract: A joint pipe element for transporting a fluid in a well includes an outer pipe having first threads at a first end; an inner pipe having first threads at a first end, the inner pipe being located inside the outer pipe; and plural lugs located between the outer pipe and the inner pipe. The first threads of the first end of the outer pipe and the first threads of the first end of the inner pipe have the same number of teeth per unit length so that the outer pipe and the inner pipe are connected, simultaneously, by a single rotational motion, to another joint pipe element.

Abstract: A method for manufacturing a joint pipe element (300) of a well system includes providing (1900) an outer pipe (340) having a bore (341); providing (1902) an inner pipe (330) having a bore (331); placing (1904) the inner pipe (330) in the bore (341) of the outer pipe (340); and connecting (1906) the inner pipe (330) to the outer pipe (340) with a connecting mechanism (360) so that a rotational torque is transferred from the outer pipe to the inner pipe.

Abstract: A wellhead adaptor for fluidly connecting to a well tubing system, the wellhead adaptor including an outer body having a bore; and an inner body located inside the bore and having an annulus A. The inner body and the outer body define an annulus B, which is concentric to annulus A.

Abstract: A method for manufacturing a joint pipe element of a well system includes providing an outer pipe having a bore; providing an inner pipe having a bore; placing the inner pipe in the bore of the outer pipe; and connecting the inner pipe to the outer pipe with a connecting mechanism so that a rotational torque is transferred from the outer pipe to the inner pipe.

Abstract: A method for manufacturing a joint pipe element of a well system includes providing an outer pipe having a bore; providing an inner pipe having a bore; placing the inner pipe in the bore of the outer pipe; and connecting the inner pipe to the outer pipe with a connecting mechanism so that a rotational torque is transferred from the outer pipe to the inner pipe.

Abstract: A method for artificial gas lift of a fluid from a well includes lowering a tubing system into the well, wherein the tubing system includes an inner tubular string, and an outer tubular string disposed concentrically around the inner tubular string; based on a flow amount of the fluid from the well, selecting an artificial gas lift process; reconfiguring the tubing system, while in the well, to implement the selected artificial gas lift process; and lifting the fluid to the surface with the selected artificial gas lift process.

Abstract: A joint pipe element for transporting a fluid in a well includes an outer pipe having first threads at a first end; an inner pipe having first threads at a first end, the inner pipe being located inside the outer pipe; and plural lugs located between the outer pipe and the inner pipe. The first threads of the first end of the outer pipe and the first threads of the first end of the inner pipe have the same number of teeth per unit length so that the outer pipe and the inner pipe are connected, simultaneously, by a single rotational motion, to another joint pipe element.

Abstract: An assist device for propelling a tool through a conduit, the assist device including an upstream housing having a first port; a downstream housing movably attached to the upstream housing and the downstream housing having a second port; and a swab element attached to the downstream housing. The first port is closed when there is no gap between the upstream housing and the downstream housing, and the first port is open when there is a gap between the upstream housing and the downstream housing.

Abstract: An assist device for propelling a tool through a conduit, the assist device including an upstream housing having a first port; a downstream housing movably attached to the upstream housing and the downstream housing having a second port; and a swab element attached to the downstream housing. The first port is closed when there is no gap between the upstream housing and the downstream housing, and the first port is open when there is a gap between the upstream housing and the downstream housing.

Abstract: A wellhead adaptor for fluidly connecting to a well tubing system, the wellhead adaptor including an outer body having a bore; and an inner body located inside the bore and having an annulus A. The inner body and the outer body define an annulus B, which is concentric to annulus A.

Abstract: The present invention is directed to producing fluid from an oil or gas well by means of a combination intermittently filled down hole chamber accumulation device and a connected upper continuous gas lift flow system, separated by an inline one-way reverse flow check valve. A two-way purge and vent valve controls the distribution of high pressure gas. The two-way valve first injects high pressure gas into the chamber accumulation device to displace the fluid from the chamber into the continuous flow conduit. The two-way valve then vents the residual high pressure gas from the chamber into a separate low pressure conduit to the surface. The valve also provides high pressure gas to the continuous flow conduit to assist in the production of the fluid.

Abstract: A unique gas lift valve bellows assembly in which an internal piston incorporated within the bellows provides over travel prevention and over pressure protection during valve operation, independent of the set or operating gas pressures exerted on the gas lift valve. The piston separates a hydraulic damping reservoir in the interior convolutions of the bellows from the upper gas volume chamber. The piston travels a pre-set distance between two stops to provide a fluid dampened hydraulic balance across the bellows convolutions in both the open and closed positions of the valve. This results in a long lived bellows valve that can operate with any pressure up to the limits of the material, without overstressing the bellows.

Abstract: A sidepocket gas lift mandrel assembly for installation in coiled tubing for providing gas lift to oil and gas wells is disclosed. The mandrel assembly includes inwardly projecting members offset from the centerline of the internal diameter of the housing which is adapted to receive wireline retrievable valves and latches. The gas lift mandrel housing is adapted to be connected to coiled tubing and may be of various geometric configurations for allowing the gas lift mandrel to be run into the well with coiled tubing. Conventional kickover tools are modified to include helical grooves that engage inwardly projecting camming and orienting surfaces of the mandrel assembly to orient, position and stabilize the tools while installing or retrieving wireline retrievable valve and latch assemblies.

Abstract: Disclosed is a method of inserting and removing tubular valves into and from the secondary bore of a mandral having a main bore and a laterally offset secondary bore. The method includes the steps of positioning a whipstock plug having a sloping upper surface in the main bore and orienting the whipstock plug such that the upper surface slopes toward the secondary bore. The valves are removed by deflecting a retrieving tool off the upper surface of the whipstock plug to engage and remove the tubular valve from the secondary bore. The valves are inserted by deflecting the valve off the upper surface and into the secondary bore. After removal or insertion of a valve, the whipstock plug is removed from the main bore.

Abstract: Disclosed are a subsurface safety system and a method of inserting into or removing from an offset bore of a mandrel a tubular valve. The system includes an entry mandrel having a full bore outlet, a full bore primary inlet and a laterally offset full bore secondary inlet. A full bore primary tubing extends downwardly from the primary inlet to a formation. A full bore secondary vent tubing is connected to the secondary inlet and extends down the hole generally parallel to the primary tubing and includes an open lower end positioned in the annulus above the formation. A dual packer is provided in the system between the entry mandrel and the lower end of the secondary tubing. The secondary tubing includes a vent above the packer and the upper end of the secondary tubing is normally closed by a removable plug. Subsurface safety valves are provided in both the primary and secondary tubings. The subsurface safety valve in the secondary tubing is positioned between the open lower end and the vent.