Surging fluids downhole in an earth borehole
An annulus pressure responsive surge tool is described for use in a conduit string in a well bore having fluid filling the annulus between the conduit string and the well bore. The annulus pressure responsive surge tool comprises; a housing having a bore therethrough, a first aperture therein to allow communication of the fluid from the exterior of the housing to the bore therethrough, and a second aperture therein to allow communication of the fluid from the exterior of the housing to the bore therethrough; a frangible closure member retained within the bore of the housing sealingly closing the same from fluid therethrough; a first annular piston slidable within a portion of the bore of the housing having, in turn, a bore therethrough, a portion of the exterior of the first annular piston sealingly engaging a portion of the bore of the housing to form a chamber containing a compressible fluid under pressure therein at a pressure less than the pressure of the fluid in the annulus. A portion of the first annular piston is in fluid communication through the first aperture in the housing with the fluid in the annulus; a second annular piston slidable within a portion of the bore of the housing having, in turn, a bore therethrough, a portion of the second annular piston abutting a portion of the first piston, a portion of the second annular piston sealingly engaging a portion of the bore of the housing, and a portion of the second annular piston in fluid communication through the second aperture in the housing with the fluid in the annulus; and first releasable locking means retained within a portion of the bore in the housing having a portion thereof releasably retaining the first piston in a first position in the bore in the housing.
- Assignee:
- Halliburton Co., Duncan, OK
- Patent Number(s):
- US 4658902
- OSTI ID:
- 6776249
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
APERTURES
BOREHOLES
CAVITIES
CLOSURES
COMPRESSIBLE FLOW
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
FASTENERS
FLUID FLOW
FLUIDS
OIL WELLS
OPENINGS
PIPES
PISTONS
POSITIONING
PRESSURE EFFECTS
RESERVOIR FLUIDS
WELL DRILLING
WELLS