Downhole gas compressor
US7644770B2 · kind B2 · utility
0Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2008 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Jul 21, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for producing gas from a well with low pressure involves running a bottom hole pressure test to graph a P-Q curve. The operator computes a frictional pressure drop due to friction of the gas flowing through the production tubing to the surface. A packer is set above perforations in the well. A screw pump is selected that has a capacity equal to the sum of the frictional pressure drop plus a desired wellhead pressure. The screw pump has a flow rate capacity determined from the P-Q curve. The operator may vary the frequency of a downhole motor to achieve the desired wellhead pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.