Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1978-03-02
1980-01-08
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
1661175, E21B 706, E21B 708
Patent
active
041824237
ABSTRACT:
A wedge-shaped whipstock is provided for directional well drilling which tapers from the lead end to a thick section at the bottom, and is fabricated from a tough polymeric material. An adhesive coating is applied to the outside surface of the wedge for permanent adherence of the whipstock to the surface of the drill hole. A deformable highly viscous material can fill and complement the internal wedge portion to produce a cylindrical configuration prior to use. Alternatively, or in conjunction with the deformable viscous material, a compressive element having a shaped compression face and made from a frangible material may be formed on the drill bit and/or attached to the prepared whipstock for the lowering of the tool into the drill hole and bonding the whipstock in place. The bottom surface of the whipstock is reinforced for positioning in the hole over a bridge plug or broken drill pipe. The weight of the drill bit and stem applied to the compressive element deforms the viscous filler material and laterally sets the whipstock in the hole. Rotation of the drill bit destroys the compressive element; and the drill, following the face of the wedge, drills an offset hole at an angle to the original. Various attachments, arrangements, and materials are provided for the whipstock wedge, filler portion and compressive element.
REFERENCES:
patent: 2043381 (1936-06-01), Lane
patent: 2058327 (1936-10-01), Lane
patent: 2281414 (1942-04-01), Clark
patent: 2297029 (1942-09-01), Shepherd et al.
patent: 2331293 (1943-10-01), Ballard
patent: 2404341 (1946-07-01), Zublin
patent: 3223158 (1965-12-01), Baker
Burton Guy C.
Gibbons Michael P.
Harris John F.
Hauser Ray L.
Thompson James R.
Burton/Hawks Inc.
Novosad Stephen J.
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