FIELD: oil and gas production.
SUBSTANCE: invention relates to oil and gas industry, namely to whipstocks intended to drill side pillars from drilled wells. Whipstock may be manufactured fully or partially without using metal, and in preferable version it is made of composite material. Body may include one or more stiffening elements, which, in preferable version, do not use metal as well. Mount bench for milling bit used to cut windows may also be nonmetal. Metal base may be used for attachment to anchor. Bevel may include plate, which may be fixed inside. In alternative version bevel may include inserts with higher hardness or other wear-resistant material.
EFFECT: method reduces time and finance expenditures in manufacturing of whipstock, and also provides for rigidity comparable to rigidity of whipstocks made of metal, with the help of provided stiffening elements, at the same time whipstock remains flexible when passing along curved sections of well.
16 cl, 14 dwg
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