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A gas flow control valve comprising coupling means for coupling to a measurement tube, wherein the coupling means are compatible with existing means for coupling valves to the measurement tube, means for directing gas from a well head through the gas flow control valve and out of an exit port, means

A gas flow control valve comprising coupling means for coupling to a measurement tube, wherein the coupling means are compatible with existing means for coupling valves to the measurement tube, means for directing gas from a well head through the gas flow control valve and out of an exit port, means for finely tuning the flow rate of gas passing through the flow control valve comprising, means for longitudinally translating a valve needle via rotation of a rotating assembly, wherein the valve needle comprises a tapered portion and a shoulder, wherein the tapered portion of the valve needle comprises a truncated cone which increases in diameter in the direction of gas flow, and means for visually indicating the longitudinal position of the gas flow control valve.

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1. A gas flow control valve comprising: a valve body having a central bore and an exit port, the central bore of the valve body having a valve body central axis, the exit port having an exit bore in fluid communication with the central bore, the exit port of the valve body having an exit port centra

1. A gas flow control valve comprising: a valve body having a central bore and an exit port, the central bore of the valve body having a valve body central axis, the exit port having an exit bore in fluid communication with the central bore, the exit port of the valve body having an exit port central axis, the exit port central axis of the exit port angled between 20 and 85 degrees relative to the valve body central axis;wherein the valve body has a proximal portion and a distal portion, wherein gas enters the valve body through the proximal portion and exits through the exit port;a threaded member having a proximal portion and a distal portion, the proximal portion of the threaded member affixed to the distal portion of the valve body, the threaded member having a threaded member central axis collinear with the valve body central axis, the threaded member comprising a threaded bore and a sliding bore, the threaded bore entering from the proximal portion of the threaded member and the sliding bore entering from the distal portion of the threaded member, the threaded bore in fluid communication with the sliding bore;a rotating assembly configured to rotate about the valve body central axis and to translate along the valve body central axis, the rotating assembly comprising a handle affixed to a threaded shaft affixed to a valve needle, the handle including a proximal portion and a distal portion, the proximal portion of the handle configured to slide within the sliding bore of the threaded member, the proximal portion including measurement indicia configured to indicate the longitudinal position of the rotating assembly relative to the threaded member;wherein the threaded bore of the threaded member is configured to accept the threaded shaft of the rotating assembly and wherein rotation of the rotating assembly relative to the threaded member causes the rotating assembly to translate relative to the threaded member;wherein the valve body includes a valve seat configured to receive the valve needle of the rotating assembly such that translation of the valve needle relative to the valve seat alters the flow rate of gas travelling through the gas flow control valve;wherein the exit bore of the exit port is located distally from the valve seat of the valve body;wherein the valve needle comprises a tapered portion; andwherein the sliding bore of the threaded member is configured to accept the proximal portion of the handle of the rotating assembly. 2. The gas flow control valve of claim 1, wherein the tapered portion of the valve needle increases in diameter in the direction of gas flow. 3. The gas flow control valve of claim 2, wherein the tapered portion of the valve needle comprises a truncated cone. 4. The gas flow control valve of claim 1, wherein the valve needle further comprises a shoulder protruding outwards from the center of the valve needle, wherein the shoulder is configured to seal with the valve seat when the flow control valve is in a closed position. 5. The gas flow control valve of claim 4, wherein the shoulder comprises a proximal face, wherein the proximal face comprises a sealing recess configured to accept a sealing member configured to seal against the valve seat. 6. The gas flow control valve of claim 1, wherein the exit port central axis of the exit port angled between 40 and 50 degrees relative to the valve body central axis. 7. The gas flow control valve of claim 1, wherein the threaded bore of the threaded member and the threaded shaft have a thread pitch configured such that at least 6 turns of the rotating assembly is required to span an adjustable range of flow rate provided by the gas flow control valve. 8. The gas flow control valve of claim 1, wherein the proximal portion of the handle comprises a sealing recess configured to receive a sealing device configured to seal the sliding bore of the threaded member. 9. The gas flow control valve of claim 1, wherein the measurement indicia of the handle are configured to be read relative to a distal surface of the threaded member. 10. The gas flow control valve of claim 1, wherein the flow control valve is configured to quickly and easily couple to an existing measurement tube via a union. 11. A method of manufacturing a flow control valve comprising: affixing distal portion of a threaded shaft to a handle;installing the threaded shaft into a threaded bore of a threaded member and a proximal portion of the handle into a sliding bore of the threaded member;affixing a valve needle to the proximal portion of a threaded shaft;sourcing a readily available socket style 45 degree wye fitting comprising a socket formed therein each opening of the wye fitting;machining a bore from the distal portion of the wye fitting producing a valve seat in the proximal portion; andinserting the proximal end of the threaded member into the distal end of the valve body and affixing the threaded member to the valve body. 12. The method of claim 11, further comprising inserting a distal portion of PVC pipe into the proximal socket of the valve body and affixing the PVC pipe to the valve body and affixing a coupling means to a proximal portion of the PVC pipe. 13. The method of claim 11, further comprising inserting a PVC pipe into the exit port socket of the valve body and affixing the PVC pipe to the valve body and coupling an extraction member to the PVC pipe. 14. The method of claim 11, wherein affixing the threaded member to the valve body comprises inserting at least one retention member into at least one retention bore passing through the valve body and into the threaded member. 15. The method of claim 11, wherein affixing a valve needle to the proximal portion of a threaded shaft comprises inserting a retention member through a retention bore passing through the valve needle and threaded member. 16. The method of claim 11, further comprising machining sealing recesses into the threaded member, the handle, and the valve needle configured to accept a sealing member. 17. The method of claim 11, wherein the valve needle comprises a tapered portion and a shoulder, wherein the tapered portion of the valve needle comprises a truncated cone which increases in diameter in the direction of gas flow.