Devices, systems and methods for equalizing pressure in a gas well
US7980311B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2009 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jul 20, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/13
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Devices, systems and methods for equalizing pressure in a gas well are provided. A jar device is coupled to a pump deployed in a gas well between areas of low pressure and high pressure. The jar device includes a mandrel and a no-go sleeve. A jarring tool is operated to transfer an axial force onto the jar device that is large enough to shear a shearable connection between the mandrel and no-go sleeve and thereby cause the mandrel to slide from a first position to a second position with respect to the no-go sleeve. A seal that seals between the no-go sleeve and mandrel when the mandrel is located in the first position is unsealed as a result of the movement of the mandrel and thereby fluid communication is allowed between the area of high pressure and low pressure. This allows for easier retrieval of the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.