Tail plug and assembly for gas lift valve
AssigneeTally Production Systems, LLC
InventorAaron Michael Benjamin Skeete
Life of this patent
Estimating the term…
Abstract
Embodiments of the present invention relate to an improved tail plug and assembly for a gas lift valve for use in oil and gas wells. The tail plug assists in preventing a pressurized component of the gas lift valve from depressurizing through leaks in the valve to the ambient. At least portion of the tail plug may be formed from brass and other portions of the gas lift valve may be formed from stainless steel. The tail plug may be maintained in the gas lift valve via an NPT treaded connection. The tail plug may further prevent leaks via an O-ring and/or a crush washer.
Claims48
A gas lift valve, comprising:
- a gas chamber inside the gas lift valve;
- a dome cap at least partially formed from stainless steel having a bore there-through, where the bore includes a first end in fluid communication with the gas chamber and a second end in fluid communication with an ambient atmosphere outside the gas lift valve;
- and
- a tail plug at least partially formed from brass for sealing at least a portion of the bore of the dome cap,
- wherein the tail plug incudes a first region including an O-ring seal and a second region, separated from the first region, including a crush washer, where the first region is closer to the first end of the bore of the dome cap than the second region.
A gas lift valve, comprising:
- a gas chamber;
- a bore at least partially formed from stainless steel having a first end in fluid communication with the gas chamber and a second end in fluid communication with an ambient atmosphere;
- and
- a tail plug at least partially formed from brass for sealing at least a portion of the bore,
- wherein the tail plug incudes a first region including an O-ring seal and a second region, separated from the first region, including a crush washer, where the first region is closer to the first end of the bore of the dome cap than the second region.
A gas lift valve, comprising:
- a gas chamber inside the gas lift valve;
- a dome cap having a bore there-through, where the bore includes a first end in fluid communication with the gas chamber and a second end in fluid communication with an ambient atmosphere outside the gas lift valve;
- and
- a tail plug for sealing at least a portion of the bore of the dome cap,
- wherein the tail plug incudes a first region including an O-ring seal and a second region, separated from the first region, including a crush washer, where the first region is closer to the first end of the bore of the dome cap than the second region.
A gas lift valve, comprising:
- a gas chamber;
- a bore having a first end in fluid communication with the gas chamber and a second end in fluid communication with an ambient atmosphere;
- and
- a tail plug for sealing at least a portion of the bore,
- wherein the tail plug incudes a first region including an O-ring seal and a second region, separated from the first region, including a crush washer, where the first region is closer to the first end of the bore of the dome cap than the second region.
Dependencies are inferred from the claim text.