Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Patent
1991-08-20
1993-02-02
Bagnell, David J.
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
166 552, 166212, 166223, 175 62, 175 67, E21B 43112, E21B 718
Patent
active
051831112
ABSTRACT:
An extended reach penetrating tool which includes a tubing string lowered into a casing, anchored in position and including a cutting tool for forming a lateral hole in the casing. A formation penetrating tool is then substituted for the cutting tool on the tubing string and extended laterally through the hole in the casing and outwardly into the formation to a desired extent for enhancing production from the formation. The cutting tool for cutting a hole in the casing includes a laterally extendable cutting element urged radially from the tubing string by a piston and cylinder assembly with the cutting element in the preferred form being a rotatably driven cutting element which is extended radially from the tubing string into cutting engagement with the interior of the casing for forming a lateral opening. The formation penetrating tool is subsequently aligned with the opening in the casing and is in the form of a spiral tube that is moved through a guide structure and out through the hole in the casing for penetrating the formation as the spiral tube is unwound by a slowly rotating drive shaft to form a rigid lance having a nozzle on the end forming a lateral bore in the formation.
REFERENCES:
patent: 1962961 (1934-06-01), Liedbeck
patent: 2066409 (1937-01-01), Loring et al.
patent: 2381929 (1945-08-01), Schlumberger
patent: 4640362 (1987-02-01), Schellstede
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