Method for directionally drilling a first well to intersect a se

Details Method for directionally drilling a first well to intersect a se Method for directionally drilling a first well to intersect a se

1982-09-28

1984-07-10

Purser, Ernest R.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

166255, 166 65M, 166 66, 175 45, E21B 704

Patent

active

044587678

ABSTRACT:
A first well is directionally drilled to intersect a second well. The second well is magnetized along its well casing to produce a magnetic anomaly which is sensed by a magnetometer located in the first. The drilling of the first well is redirected in accordance with the magnitude of the sensed anomaly so as to cause intersection of the first well with the second well.

REFERENCES:
patent: 2259904 (1941-10-01), McNamee et al.
patent: 3114876 (1963-12-01), Schuster
patent: 3277363 (1966-10-01), Schuster
patent: 4224989 (1980-09-01), Blount
patent: 4372398 (1983-02-01), Kuckes
Robinson, J. D., "Magnetostatic Methods for Estimating Distance and Direction from a Relief Well to a Cased Wellbore," JPT, Jun. 1972, pp. 741-749.

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