Borehole drill pipe continuous side entry or exit apparatus and

Details Borehole drill pipe continuous side entry or exit apparatus and Borehole drill pipe continuous side entry or exit apparatus and

1986-02-19

1987-07-21

Leppink, James A.

Wells

Conduit wall or specific conduit end structure

Downhole coupling or connector

E21B 1700, E21B 1908

Patent

active

046811621

ABSTRACT:
A side entry sub for use in a drill pipe string which permits continuous injection and/or removal of a wireline equipped with analitical instruments within the hollow of the pipe without interrupting the connection or resulting communication between the wireline and tool apparatus. The operation is performed with the top power device connected to the drill pipe string and may be used during pressure application of drilling mud. Such a device permits location of a stuck pipe without disassembly of the top power drive.

REFERENCES:
patent: 4062551 (1977-12-01), Base
patent: 4200297 (1980-04-01), Tricon
patent: 4388969 (1983-06-01), Marshall et al.
patent: 4399877 (1983-08-01), Jackson et al.
patent: 4506729 (1985-03-01), Davis, Jr. et al.
patent: 4524834 (1985-06-01), Barron et al.

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