Apparatus for washover featuring controllable circulating valve

Patent · Tue Jun 07 04:00:00 EDT 1988

OSTI ID:6849358

Skipper, U; Herod, E E; Ponder, M M

For use with a wash pipe, this patent describes an apparatus which comprises: (a) an elongate hollow tubular member; (b) means at the upper end of the tubular member connectable to a drill string for running into a well borehole; (c) means at the lower end of the tubular member connectable to a wash pipe for running into a well borehole; (d) a movable sleeve in the tubular member mounted for movement between first and second positions; (e) port means formed in the sleeve; (f) bypass port means in the tubular member defining a drilling fluid flow path through the tubular member to the exterior of the tubular member; (g) seal means cooperative with the tubular member and the port means to prevent fluid flow through the bypass port means when the sleeve is in the second position while permitting fluid flow when the sleeve is in the first position; and (h) fluid flow restrictor means for moving the sleeve, the restrictor means responding to a velocity related pressure drop during fluid flow.

• Assignee: J.B. Deilling Co., Houston, TX
• Patent Number(s): US 4749044
• OSTI ID: 6849358
• 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
CONTROL SYSTEMS
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
DRILLING FLUIDS
DUCTS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUIDS
NATURAL GAS WELLS
OIL WELLS
PIPES
SEALS
SLEEVES
VALVES
WELLS