Method and apparatus for deviated drilling
AssigneeWeatherford U.S., Inc.
InventorsThurman B. Carter, Mark W. Schnitker
Life of this patent
Estimating the term…
Abstract
A whipstock assembly which includes a guide section and a setting section, wherein the setting section is configured to facilitate slight rotation of said setting section when the whipstock is set within a well, which rotation urges the guide section securely against the sidewall of the wellbore. Setting section includes a surface which will serve as a fulcrum, and a radially moveable element which serves to apply a force to one side of the whipstock, allowing the whipstock assembly to move as a lever, wherein the guide section is caused to meet the wellbore sidewall.
Claims22
A whipstock assembly, comprising:
- a tapered guide surface;
- and
- a setting section operatively coupled to said taper guide surface, said setting section comprising,
- a housing assembly,
- a contact pad extending from said housing assembly, and
- a radially moveable member, said radially moveable member coupled to said housing on the longitudinally opposite side of said contact pad from said tapered guide surface, said radially movable member movable in a direction generally perpendicular to a pivot axis established by said contact pad.
A whipstock assembly, comprising:
- a guide section;
- and
- a setting section operatively coupled to said guide section assembly at a first location, said setting section comprising,
- a housing assembly,
- a contact pad assembly operatively coupled to said housing at a first location,
- a setting slip operatively coupled in moveable relation relative to said housing, said setting slip coupled to said housing at a second location which is longitudinally offset from said first location where said guide section assembly is coupled to said setting section, said setting slip being placed generally diametrically opposite said contact pad assembly, and
- a setting mandrel moveable in response to mechanical force, said setting mandrel moveable between first and second positions, wherein in said second position a force is applied to said setting slip to move said slip radially outwardly.
A whipstock assembly, comprising:
- a guide section having an upper end point;
- and
- a setting section operatively coupled to said guide section assembly at a first location, said setting section comprising,
- a housing assembly,
- an upper slip assembly operatively coupled to said housing and arranged for radial movement relative to said housing upon relative longitudinal movement between said slip and said housing, and
- a second slip assembly operatively coupled in moveable relation to said housing and arranged for radial movement relative to said housing upon relative longitudinal movement between said second slip and said housing, said second slip coupled to said housing at a location which will be longitudinally beneath said first location when said whipstock assembly is disposed within a wellbore.
Dependencies are inferred from the claim text.