Boring or penetrating the earth – Processes – Boring with specific fluid
Patent
1987-01-23
1988-09-13
Suchfield, George A.
Boring or penetrating the earth
Processes
Boring with specific fluid
166295, 405264, E01D 312, E21B 33138
Patent
active
047702575
ABSTRACT:
This invention provides a method of preventing loss of muddy water used in boring a hole in the ground by a drill bit or the like with the muddy water introduced into the hole to stabilize hole walls and to remove slime resulting from the boring. When the muddy water is getting lost to the soil, a chemical liquid comprising an isocyanate compound or including an isocyanate compound as a main component is introduced along with a fibrous filler to a depth of the hole. The position from which the muddy water is leaking is filled with the fibrous filler and is sealed with a cured product of the chemical liquid.
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Rogers, Walter F., Compositions and Properties of Oil Well Drilling Fluids, 1st Ed., 1948, pp. 449-451.
Kitano Masayasu
Kondo Motoki
Kubota Hirosuke
Oshita Toshiyuki
Shinozaki Mamoru
Greigg Edwin E.
Kabushiki Kaisha Takenaka Komuten
Suchfield George A.
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