Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent
1998-03-27
2000-04-18
Neuder, William
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
166386, 166 68, 166105, E21B 2300, E21B 3414
Patent
active
060503408
ABSTRACT:
Installation/removal assembly and method are disclosed that reduce forces required for installing and removing from a wellbore hydraulic artificial lift installations, such as, for example, hydraulic reciprocating pumps, hydraulic jet pumps, coil tubing hydraulic jet pumps, and other hydraulically operated installations. The installation/removal assembly is provided with a hydraulically activated latch and spear assembly that, in a preferred embodiment, includes no radially extending latch elements for securing a bottomhole assembly to a reservoir connection, such as a seating nipple designed for use with mechanical latches. A bottomhole assembly is provided with relatively moveable inner and outer members that move between closed and open positions for respectively sealing or equalizing, differential pressure across a one-way valve that arises when the pump is turned off. The pressure above the one-way valve may be the same as the annulus pressure between the production tubing and the bottomhole assembly of the hydraulic artificial lift installation. External communication embodiments of the present invention communicate directly to the annulus between the production tubing and the bottomhole assembly of the artificial hydraulic lift installation. Internal communication embodiments of the present invention communicate internally of the outer member through the pump output port to the annulus to avoid debris that may exist in the annulus below a pump discharge port.
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Neuder William
Weatherford International, Inc.
LandOfFree
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