Inverse differential casing cementing float valve

Patent · Tue Oct 07 04:00:00 EDT 1986

OSTI ID:5164689

Kuhlman, Jr, R D

This patent describes an inverse differential fill-up casing cementing float valve having an inlet thereto and outlet therefrom characterized in that the float valve permits fluid flow therethrough in a first direction upon a predetermined fluid pressure level thereacross and continuously prevents fluid flow therethrough in a second direction. The float valve includes: an annular float valve housing; a back pressure valve assembly contained within the annular float valve housing; a first differential pressure check valve assembly connected to the back pressure valve assembly and contained within the annular float valve housing; a second differential pressure check valve assembly connected to the first differential pressure check valve assembly and contained within the annular float valve housing; and cementitious filter material retaining and securing the back pressure valve assembly, the first differential pressure check valve assembly and the second differential pressure check valve assembly within the annular float valve housing.

• Assignee: Halliburton Co., Duncan, OK
• Patent Number(s): US 4615394
• OSTI ID: 5164689
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BUILDING MATERIALS
CEMENTING
CEMENTS
CONTROL
CONTROL EQUIPMENT
EQUIPMENT
FILLERS
FLOW REGULATORS
FLUID FLOW
MATERIALS
NATURAL GAS WELLS
OIL WELLS
PRESSURE CONTROL
VALVES
WELL CASINGS
WELLS