Devices, systems and methods for equalizing pressure in a...

Details Devices, systems and methods for equalizing pressure in a... Devices, systems and methods for equalizing pressure in a...

2011-07-19

2011-07-19

Thompson, Kenneth (Department: 3672)

Wells

Processes

Freeing stuck object, grappling or fishing in well

C166S334100

Reexamination Certificate

active

07980311

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.

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