Gravel packer

Patent · Tue Jan 27 04:00:00 EST 1987

OSTI ID:6904276

Zunkel, G D; Bolin, M L

A retrievable gravel packer is described for placing a gravel pack in a wellbore about a gravel screen disposed therebelow across a producing formation comprising: a gravel packer assembly; a packer element disposed on the exterior of the assembly; J-slot means in the assembly for selectively maintaining the packer element in an unset mode; ratchet means in the assembly for releasably locking the packer element in a set mode; an intake passage in the assembly for receiving fluid from a tubing string in the well bore above and secured to the gravel packer; a return passage for receiving fluid from the interior of the gravel screen; a circulation passage extending from the exterior of the gravel packer below the packer element to the intake passage; closeable crossover means to receive fluid from the return passage and guide the received fluid from the return passage to the exterior of the assembly above the packer element; first check valve means for preventing back flow to the intake passage from the interior of the gravel screen; second check valve means adapted to selectively open the intake passage to the circulation passage in response to a positive pressure differential between the exterior of the gravel packer and the intake passage; and check valve release means for inactivating the second check valve means in response to a fluid pressure buildup in the intake passage thereabove.

• Assignee: Halliburton Co., Duncan, OK
• Patent Number(s): US 4638859
• OSTI ID: 6904276
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CONTROL EQUIPMENT
DRILL BITS
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FABRICATION
FASTENING
FLOW REGULATORS
GRANULAR MATERIALS
INTAKE STRUCTURES
JOINING
MATERIALS
MECHANICAL STRUCTURES
NATURAL GAS WELLS
OIL WELLS
PACKINGS
PIPES
PRESSURIZING
SCREENS
VALVES
WELLS