Downhole material injector for lost circulation control

Details Downhole material injector for lost circulation control Downhole material injector for lost circulation control

1991-04-17

1994-09-06

Dang, Hoang C.

Boring or penetrating the earth

With means movable relative to tool below ground to control...

166334, 175215, 175257, 175317, 175324, 405269, E21B 33138, E21B 3314

Patent

active

053439686

ABSTRACT:
Apparatus and method for simultaneously and separately emplacing two streams of different materials through a drillstring in a borehole to a downhole location for lost circulation control. The two streams are mixed outside the drillstring at the desired downhole location and harden only after mixing for control of a lost circulation zone.

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patent: 4645006 (1987-02-01), Tinsley
patent: 4823890 (1989-04-01), Lang
patent: 4842066 (1989-06-01), Galiakbarov et al.
patent: 5006017 (1991-04-01), Yoshida et al.

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