Drilling technique for providing multiple-pass penetration of a mineral-bearing formation
Patent
·
OSTI ID:5856745
This specification discloses a technique of providing a wellbore that is extended along a track from the surface of the earth and penetrates and passes through a subsurface mineral-bearing formation a plurality of times. The wellbore is initially extended from the surface of the earth into the earth's crust in essentially a vertical direction and then is deviated toward the horizontal and extended to pass through the subsurface mineral bearing formation from top to bottom at an oblique angle. The wellbore is then further deviated and extended along a track in an upwardly direction such that it again penetrates and passes through the subsurface mineral-bearing formation, this time from bottom to top. The wellbore may then again be deviated and extended along a downward track to again penetrate the formation from the top.
- Assignee:
- Mobil Corp
- Patent Number(s):
- US 4386665
- OSTI ID:
- 5856745
- Country of Publication:
- United States
- Language:
- English
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