Closure device

Patent · Tue Jun 11 04:00:00 EDT 1985

OSTI ID:6322786

Sable, D E

A closure device connectible to a well head through which the polished rod of a rod string extends into a well tubing for operating pump means for moving well fluids to a surface flow conductor, the closure device having a tubular ram provided with a packing or plug for closing an annular passage between the polished rod and a tubular body connected to the well head above a lateral port of the tubular body, the tubular ram and the tubular body having thread means for moving the plug between an operative lower position wherein it closes the annular passage when the rod string is stationary and on inoperative upper position; seal means between the ram and the polished rod spaced above the plug; and a plurality of independent seal means between the ram and the tubular body operative when the plug is in its inoperative position. The plug of the closure device is especially adapted to operate under high temperature and pressure conditions of the well, as during steam injection operations when the rod string is stationary, to protect the seal means from high pressures and temperatures as well as any fluids which may be corrosive or otherwise deleterious to the substance of which the seal means are made.

• Assignee: EDB-86-014455
• Patent Number(s): US 4522368
• OSTI ID: 6322786
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CLOSURES
CONTROL EQUIPMENT
CORROSION RESISTANCE
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FIELD PRODUCTION EQUIPMENT
FLOW REGULATORS
FLUID INJECTION
MECHANICAL PROPERTIES
NATURAL GAS WELLS
OIL WELLS
PHYSICAL PROPERTIES
PIPES
PUMPS
RODS
STEAM INJECTION
THERMODYNAMIC PROPERTIES
WELL CASINGS
WELL RECOVERY EQUIPMENT
WELLHEADS
WELLS