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2 006 575

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C1

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IPC

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Application

4915885/03, 1991-01-16

(22)

Actual filing date

1991-01-16

(45)

Published

1994-01-30

(72)

Inventor

Chesnokov V.A.Rapin V.A.Bernshtejn D.A.Barskij I.M.Evdokimov V.I.Galikeev I.A.

(73)

Holder

Nauchno-Proizvodstvennaja Firma

METHOD OF INVESTIGATION OF HORIZONTAL BOREHOLES Russian patent published in 1994 - IPC

Abstract RU 2006575 C1

FIELD: drilling of inclined and horizontal boreholes. SUBSTANCE: logging cable is made up of two lengths fastened with the help of split sleeve coupling. Geophysical instrument is lowered through drill pipes on one end of logging cable into protective container, coupling is detached, its lower joint is attached to end of upper string of drill pipes. Protective container with geophysical instrument is delivered to face of borehole and second length of logging cable with upper joint on end is sunk into drill pipes to obtain electric connection of two joints. When conducting investigations prior to disconnection of each due string of drill pipes sleeve coupling is detached, upper joint is lifted with the use of logging cable and after separation of each due string upper joint is lowered with logging cable till electric connection with lower joint is achieved. EFFECT: improved investigation efficiency. 2 dwg

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RU 2 006 575 C1

Authors

Chesnokov V.A.

Rapin V.A.

Bernshtejn D.A.

Barskij I.M.

Evdokimov V.I.

Galikeev I.A.

Dates

1994-01-30—Published

1991-01-16—Filed

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