03-10-2013 дата публикации
Номер: US20130255959A1
Принадлежит:
A plunger for removing fluid from a gas producing well has a fluid path through the plunger body, a narrow passageway within the fluid path, and a central orifice at an end of the passageway. The plunger may have a lip within the fluid path spaced above the central orifice. The lip can interact with gas and fluid exiting the central orifice when the plunger is rising within the gas producing well. The lip may be provided by an internal fishing neck. The plunger may have a bypass valve to allow the plunger to fall while the well is flowing, and may have a central constriction to regulate the rate of falling. 1. A plunger for performing plunger lift in a gas producing well , the plunger comprising:a plunger body for sealingly engaging a tubing of the well;a fluid path through the plunger body;a narrow passageway within the fluid path; anda central orifice at an end of the narrow passageway.2. A plunger as defined in claim 1 , further comprising a radially inwardly directed lip within the fluid path spaced above the central orifice.3. A plunger as defined in claim 2 , wherein the distance between the central orifice and the lip is between 10% and 60% of the total length of a body of the plunger.4. A plunger as defined in claim 2 , wherein the fluid path comprises a lower chamber below the narrow passageway and an upper chamber above the narrow passageway.5. A plunger as defined in claim 4 , wherein the diameter of the narrow passageway is less than the diameter of the lower and upper chambers.6. A plunger as defined in claim 4 , wherein the radially inwardly directed lip is on an upper edge of the upper chamber.7. A plunger as defined in claim 5 , wherein the upper chamber claim 5 , the lower chamber claim 5 , the central orifice claim 5 , and the lip all have a circular cross-section and are all concentric about a longitudinal centerline of the plunger.8. A plunger as defined in claim 1 , wherein the narrow passageway comprises two or more connecting channels joined ...
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