Echo ranging gun

Patent · Tue Jan 20 04:00:00 EST 1987

OSTI ID:6824386

McCoy, J N

A system is described for sensing the depth of a liquid gas interface in the wellbore, comprising: a structure defining a volume chamber therein, the structure being adapted for connection to the well and the structure having a passage opening into the volume chamber at one end thereof and exposed to the wellbore gas pressure at the other end thereof when the structure is connected to the well; a poppet valve positioned in the volume chamber and movable along a first axis between open and closed positions, the poppet valve having sealing means for isolating the passage and volume chamber to prevent gas flow therebetween when the poppet valve is in the closed position. The poppet valve permits gas flow between the passage and the volume chamber in the open position; means for moving the poppet valve to the closed position and for rapidly releasing the poppet valve while in the closed position for movement to the open positions; and a bleed valve mounted in the structure in communication with the volume chamber and the atmosphere which is operable between open and closed positions to permit gas in the volume chamber to be released to the atmosphere in the open position to lower the pressure in the volume chamber while preventing gas flow from the volume chamber to the atmosphere in the closed position.

• Assignee: NOV; NOV-87-045551; EDB-87-053110
• Patent Number(s): US 4637463
• OSTI ID: 6824386
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
ACOUSTIC MEASUREMENTS
CONTROL EQUIPMENT
DEPTH
DIMENSIONS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
GAS FLOW
GASKETS
GUNS
MACHINE PARTS
NATURAL GAS WELLS
OIL WELLS
POSITIONING
SEALS
SHAFTS
SIGNALS
SONIC LOGGING
VALVES
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS