Oil well testing string bypass valve

Patent · Tue Mar 31 04:00:00 EST 1981

OSTI ID:6161364

Mcgraw, T E; Zimmerman, J C

An improved bypass valve for use with an oil well testing string is disclosed which includes a check valve means for allowing fluid flow from the interior of the test string to the well annulus when the interior pressure exceeds the well annulus pressure. The bypass valve further includes a blocking means which blocks interior communication with the check valve means when the well annulus pressure exceeds the string interior pressure. A delay means is included which delays the action of the blocking means for a predetermined length of time. The improved bypass valve is intended for use in a testing string for an oil well, and is to be placed in the testing string below a normally closed tester valve and above a seal assembly for insertion into sealing engagement with a preset production type packer. The time delay allows the seal assembly to be removed from the packer after the packer location is determined without activating the blocking means to move to its locked closed position.

• Assignee: Halliburton Co
• Patent Number(s): US 4258793
• OSTI ID: 6161364
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
BYPASSES
CONTROL EQUIPMENT
DRILL STEM TESTING
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
OIL WELLS
TESTING
VALVES
WELLS