Wellbore fluid sampling apparatus

Patent · Tue Aug 30 04:00:00 EDT 1988

OSTI ID:6981165

Petermann, S G

An apparatus is described for capturing a sample of fluid from a wellbore characterized by: an elongated generally tubular body member, the body member including means for connecting the apparatus to means for lowering the apparatus into a wellbore; the body member including means defining a generally cylindrical bore and port means in the body member opening into the bore for conducting a flow of fluid to be sampled into the bore; piston means disposed in the bore and dividing the bore into first and second chambers, the first chamber being operable to be in flow communication with the port means for receiving the fluid sample through the port means, and the second chamber being filled with a displacement fluid to prevent displacement of the piston means to increase the volume of the first chamber; valve means in communication with the second chamber for selectively valving displacement fluid from the second chamber to permit the piston means to increase the volume of the first chamber; and closure means for the first chamber for closing off communication of the first chamber with the port means when the first chamber has received the fluid sample.

• Assignee: Atlantic Richfield Co., Los Angeles, CA
• Patent Number(s): US 4766955
• OSTI ID: 6981165
• 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
EQUIPMENT
FIELD PRODUCTION EQUIPMENT
FLOW REGULATORS
FLUIDS
NATURAL GAS WELLS
OIL WELLS
PISTONS
RESERVOIR FLUIDS
SAMPLERS
SAMPLING
TESTING
VALVES
WELL RECOVERY EQUIPMENT
WELLS