Apparatus for well cementing through a tubular member

Patent · Mon Mar 12 23:00:00 EST 1984

OSTI ID:6560570

Callihan, R B; Stone, L R

An apparatus for effecting two stage cementing of well conduits by supplying cement through a smaller diameter tubular member. The apparatus involved provides a tubular assembly attachable to the bottom end of a well conduit. The tubular assembly defines an axial cementing passage through its bottom end. Cementing ports are provided in the tubular assembly above its bottom end to implement the second stage cementing operation. A tubular member is sealingly secured in the upper end of the tubular assembly and valve units are provided between the end of the tubular member and the cementing ports. The lower annular valve unit is selectively releasably positioned in a closed position relative to the radial cement ports. At the conclusion of the first stage of cementing, a first sealing plug is dropped through the tubular member into sealing engagement with the bore of the lower annular valve unit and fluid is applied through the tubular member to shift the lower annular valve unit to an open position. After the second stage, a second sealing plug is dropped through the tubular member to seal the bore of the upper annular valve unit and fluid pressure applied through the tubular member will effect the displacement of the upper annular valve unit to a position sealing the radial cementing ports.

• Assignee: Baker Oil Tools Inc.
• Patent Number(s): US 4436151
• OSTI ID: 6560570
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
BUILDING MATERIALS
CEMENTING
CEMENTS
CONTROL EQUIPMENT
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FIELD PRODUCTION EQUIPMENT
FLOW REGULATORS
MATERIALS
PIPES
SEALS
SLEEVES
TUBES
VALVES
WELL COMPLETION
WELL INJECTION EQUIPMENT
WELLS