Well perforator with anchor and method

Details Well perforator with anchor and method Well perforator with anchor and method

1977-08-08

1978-10-31

Purser, Ernest R.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166209, 102 218, 175 452, E21B 43119, E21B 4000

Patent

active

041228995

ABSTRACT:
A cased borehole has a tubing string run downhole thereof. A packer affixed to the tubing is set with the tubing string terminating in proximity of a hydrocarbon producing formation to be completed. A wireline operated perforating gun is suspended from a mass by means of a lost motion coupling and the mass is suspended from a wireline. The entire apparatus is run downhole and positioned adjacent to the hydrocarbon containing formation. The gun is detonated; whereupon formation fluid enters the casing and tends to thrust the gun uphole respective to the mass and to the wireline. The relative motion between the gun and mass is advantageously used to set a tool hold down apparatus which arrests uphole thrust of the gun. The gun can be subsequently retrieved by lifting the mass with the wireline, thereby releasing the tool hold down apparatus and enabling wireline retrieval of the entire apparatus suspended from the wireline.

REFERENCES:
patent: 1875583 (1932-09-01), Fox
patent: 2108174 (1938-02-01), Mays
patent: 2141030 (1938-12-01), Clark
patent: 2897898 (1959-08-01), Wynn
patent: 3602306 (1971-08-01), Alexander, Jr.
patent: 3669187 (1972-06-01), Alexander, Jr.

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