Pressure-operated oil and gas well swabbing device

Details Pressure-operated oil and gas well swabbing device Pressure-operated oil and gas well swabbing device

E - Fixed Constructions

21

B

166/56

E21B 37/10 (2006.01)

Patent

CA 2017440

ABSTRACT OF THE INVENTION An oil well swabbing device having a pressure acti- vated valve for use in closing a fluid passage therein when the swabbing device is submerged under liquid in a well casing corresponding to a predetermined valve closing pressure; the pressure-activated valve comprising a pressure collapsible bladder such as a bellows or diaphragm, a valve and seat interposed in the fluid passage, and an acutator rod connecting the valve to the pressure collapsible bladder such that the valve is closed when the bladder is collapsed to a degree corresponding to the predetermined valve closing pressure. Improved speed brakes, catchers, and posi- tion indicators for oil well swabbing devices are also disclosed.

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