Extractor for an injection pipe

Details Extractor for an injection pipe Extractor for an injection pipe

1992-07-08

1994-05-17

Britts, Ramon S.

Wells

Above ground apparatus

Moving tubing or cable into an existing well

166 98, 226162, E21B 1906

Patent

active

053119371

ABSTRACT:
An apparatus is provided for automatically extracting a grout injection pipe through which grout is injected into fragile ground for improving the same. An extractor for an injection pipe has an extracting main body including a chucking element for chucking the periphery of the injection pipe through a chucking member, a piston cylinder having a rod to which the chucking element is secured, and a rod position detector opposite to the rod of the piston cylinder for detecting movement of the rod. A control device is included for providing an injection pipe chucking and releasing signal to the chucking actuating valve and for providing rod ascending and descending signals to a rod ascending and descending valve. The extracting main body and the control are separately located.

REFERENCES:
patent: 1929055 (1933-10-01), Carr
patent: 3285485 (1966-11-01), Slator
patent: 4051988 (1977-10-01), Egerstrom et al.
patent: 4256286 (1981-03-01), Hudgins
patent: 4632183 (1986-12-01), McLeod
patent: 4804165 (1989-02-01), Pippin et al.
patent: 4890671 (1990-01-01), Baxter
patent: 4925159 (1990-05-01), Younes

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