| 摘要 |
<p>A method of producing gas through liquid level detection in an oil or gas well uses various types of artificial lift systems (10) that include subsurface gas lift, beam pumps, progressive cavity pump and submersible pumps. The artificial lift systems (10) are controlled in response to a known liquid level (34) within the wellbore to prevent the well from pumping off and damaging the artificial lift system (10) or from reducing the liquid level (34) in the wellbore to an unnecessarily low level to thereby increase the energy required by the artifical lift system (10) to remove the liquid (32) from the wellbore. The liquid level detection method includes the detection of at least the pressure on a side string tube in the wellbore to determine the level of liquid in the wellbore for automated control of liquid removal from the wellbore to be removed to the surface through a production tube to allow improved gas or oil production, increase artificial lift efficiency and to allow for control of the artificial lift system to prevent damage to the system. Another method measures production from the well in conjuction with automated liquid level control to maximize liquid level in the wellbore without interfering with production. A timing method allows for control of the quantity of gas injected during the gas injection cycle of a subsurface gas lift artificial lift system.</p> |
