Foot valve for pumping wells

Patent · Tue Oct 11 04:00:00 EDT 1988

OSTI ID:6632847

Dollison, W W

This patent describes an apparatus for plugging a well conduit below a rod-type well pump upon withdrawal thereof from the well, the apparatus including: (a) foot valve nipple means having a bore extending therethrough and having attachment means at its upper end for attachment to a well conduit, the foot valve nipple means further including: (i) lateral port means, (ii) an annular seat surface in the foot valve nipple surrounding the bore above the lateral port means, and (iii) support means below the lateral port means and a spaced distance below the annular seat surface providing an upwardly facing stop shoulder; (b) foot valve means in the foot valve nipple means and supportable in its lower, open position by the upwardly facing stop shoulder and movable to an upper, closed position engagement with the annular seat means to plug the same, the foot valve means including: (i) foot valve body means formed with downwardly facing shoulder means engageable with the upwardly facing stop shoulder means in the housing, and a seat surface spaced above the downwardly facing shoulder, and (ii) a fishing neck stem on the foot valve body projecting upwardly therefrom and being engageable by means for lifting the foot valve to a position of engagement with the annular seat surface of the foot valve nipple means, and (c) foot valve operator means attachable to the lower end of a well pump for lifting and lowering the foot valve means between its open and closed positions in the foot valve nipple means, the foot valve operator means.

• Assignee: Otis Engineering Corp., Dallas, TX
• Patent Number(s): US 4776401
• OSTI ID: 6632847
• 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
DESIGN
DUCTS
EQUIPMENT
FIELD PRODUCTION EQUIPMENT
FLOW REGULATORS
MECHANICAL STRUCTURES
NATURAL GAS WELLS
OIL WELLS
PUMPS
ROD PUMPS
SUPPORTS
VALVES
WELL RECOVERY EQUIPMENT
WELLS