Rapid cycle annulus pressure responsive tester valve

Patent · Tue Apr 12 00:00:00 EDT 1988

OSTI ID:5033209

Zunkel, G D

An annulus pressure responsive tester valve is described comprising: a tubular housing assembly defining an axial bore therethrough; a valve ball rotatably disposed in the housing assembly across the bore for opening and closing the passage through the bore; valve ball rotation means operable to pull the valve ball to an open position in response to movement of a longitudinally slidable mandrel assembly extending downwardly from the valve ball in the housing assembly; a first substantially constant volume fluid chamber filled with a displacement fluid disposed about the mandrel assembly; a valve housing longitudinally slidably disposed in and dividing the first fluid chamber and in slidable scaling engagement with the housing assembly and the mandrel assembly; at least one longitudinal valve passage extending through the valve housing; swivel mandrel means secured to the valve housing in rotatable relationship thereto and maintaining at least one ratchet ball in a ratchet slot on the exterior of the mandrel assembly; a second, variable volume fluid chamber filled with a pressurized, substantially compressive fluid immediately below the lower floating piston and in communication with the bottom thereof; and port means above the upper floating piston extending from the exterior of the housing assembly to the interior thereof in substantially instantaneous communication with the top of the upper floating piston and, through the displacement fluid, with the top of the lower floating piston.

• Assignee: Halliburton Co., Duncan, OK
• Patent Number(s): US 4736798
• OSTI ID: 5033209
• Resource Relation: Patent File Date: Filed date 16 May 1986
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
VALVES
DESIGN
FIELD PRODUCTION EQUIPMENT
FLUID FLOW
HYDRAULICS
NATURAL GAS WELLS
OIL WELLS
OPERATION
SLEEVES
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
MECHANICS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing