Borehole devices actuated by fluid pressure

Patent · Tue Mar 17 04:00:00 EST 1987

OSTI ID:6632221

George, F R; Smith, M R

An apparatus is described for actuating a perforating device downhole in a borehole extending from the surface of the earth and containing fluid therein. The apparatus is attached to an end of a tubing string extending from the surface of the earth and having the perforating device attached to the other end thereof. The apparatus comprises: a body; a port for admitting fluid pressure into the body; means within the body in fluid pressure communication with the port for actuating the device in response to (1) a fluid pressure level greater than a first predetermined fluid pressure level communicated through the port. The first predetermined fluid pressure level communicated through the port is in excess of the hydrostatic pressure level of the fluid in the borehole, followed by (2) a second fluid pressure level communicated through the port. The second fluid pressure level communicated through the port is less than the first predetermined fluid pressure level; and disarming means for rendering the actuating means inoperable through the application of fluid pressure through the tubing string to the disarming means thereby preventing the actuation of the perforating device while allowing retention of the perforating device on the tubing string to allow the removal of the perforating device with the tubing string when the tubing string is removed from the borehole.

• Assignee: Halliburton Co., Duncan, OK
• Patent Number(s): US 4650010
• OSTI ID: 6632221
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BOREHOLES
CAVITIES
CLOSURES
CONTROL EQUIPMENT
DETONATIONS
DETONATORS
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLUIDS
HYDRAULIC CONTROL DEVICES
HYDRAULIC FLUIDS
NATURAL GAS WELLS
OIL WELLS
PERFORATION
PIPES
PISTONS
PRESSURE EFFECTS
WELLS
WORKING FLUIDS