Boring or penetrating the earth – Below-ground impact members – Fluid-operated
Patent
1997-04-11
1999-08-03
Dang, Hoang C.
Boring or penetrating the earth
Below-ground impact members
Fluid-operated
166178, 175321, E21B 31113
Patent
active
059312424
ABSTRACT:
A dual acting hydraulic jarring enhancer which is particularly well suited for coiled tubing application. A common annular chamber is formed between reciprocating cylindrical assemblies, and a piston is positioned within the annular chamber. The inner cylindrical assembly has a member to contact the piston and move it relative to the outer cylindrical assembly in one direction while the outer cylindrical assembly has a member to prohibit longitudinal movement of the piston relative to the inner cylindrical assembly in a second direction. In this manner, the present invention provides a tool with overall minimal length by using a singular annular chamber capable of being divided into two other chambers and providing an accelerating effect to a hammer/anvil of an associated jarring tool in either an upjarring or downjarring mode.
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Dang Hoang C.
IRI International Corporation
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