Patent US3195271A successfully refreshed from Google Patents.
US4397355A
Expired / Lapsed
US
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Whipstock setting method and apparatus
Assignee: Smith International Inc
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Filing: 1981-05-29
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Granted: 1983-08-09
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Expires: 2001-05-29
Abstract
Abstract A whipstock setting apparatus including a whipstock with an anchor-packer connected on its lower end and a cutter releasably connected to the upper end of the whipstock with a fluid line connecting from the bore of the cutter to the anchor-packer for setting of the anchor-packer whereby the whipstock can be set in the cased well bore at a level above the bottom without having to make a round trip with the well string on which it is lowered into the cased well bore. The method of setting a whipstock includes the steps of lowering the apparatus into the cased well bore on a well string, orienting the whipstock, checking the orientation of the whipstock with a wire line survey instrument run through the well string, pressuring the well string to set the anchor-packer and lowering and rotating the well string to commence milling after the anchor-packer has been set.
Inventors
- 👤 Roy T. McLamore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:12
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/06; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; E21B7/00; E21B7/04; E21B7/06; E21B7/061
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
The method of setting a whipstock and commencing drilling in a single trip of a well string including the steps of running a whipstock having an anchor-packer connected to its lower end and a mill releasably connected to its upper end on a well string connected to the mill into a cased well bore to a desired level, determining the orientation of the whipstock, exerting a fluid pressure through said well string to set the anchor-packer, and lowering and rotating the well string to release the connection of the cutter to the whipstock and to commence milling through the casing to allow drilling of a new well bore.
Claim 2
Independent Claim
108 words
The method of setting a whipstock and commencing drilling in a single trip of a well string including the steps of running a whipstock having an anchor-packer connected to its lower end and a mill releasably connected to its upper end on a well string connected to the mill into a cased well bore to a desired level, determining the orientation of the whipstock, exerting a fluid pressure through said well string to set the anchor-packer, and lowering and rotating the well string to release the connection of the cutter to the whipstock and to commence milling through the casing to allow drilling of a new well bore.
Claim 3
Dependent Claim
34 words
The method according to claim 1 wherein said setting step wherein said fluid under pressure is supplied through the well string, through the mill and the whipstock to the anchor-packer to set the anchor-packer.
Claim 4
Independent Claim
118 words
An apparatus for setting a whipstock and for changing the direction of drilling through a cased well bore with a single trip of the well string comprising a whipstock, a well string, a mill connected on said well string, means releasably connecting the mill to the upper portion of the whipstock, an anchor-packer, means connecting the anchor-packer to the lower end of the whipstock, and a fluid passage extending through said well string said mill, and said whipstock to the said anchor-packer, said anchor-packer having setting means which can be actuated responsive to fluid under pressure supplied through said fluid passage when the anchor-packer is in a cased well bore connected to the lower end of the whipstock.
Claim 5
Independent Claim
118 words
An apparatus for setting a whipstock and for changing the direction of drilling through a cased well bore with a single trip of the well string comprising a whipstock, a well string, a mill connected on said well string, means releasably connecting the mill to the upper portion of the whipstock, an anchor-packer, means connecting the anchor-packer to the lower end of the whipstock, and a fluid passage extending through said well string said mill, and said whipstock to the said anchor-packer, said anchor-packer having setting means which can be actuated responsive to fluid under pressure supplied through said fluid passage when the anchor-packer is in a cased well bore connected to the lower end of the whipstock.
Claim 6
Dependent Claim
31 words
An apparatus according to claim 3 wherein said setting means includes a piston positioned in said anchor-packer, and means for conducting fluid under pressure from said well string to said piston.
Claim 7
Dependent Claim
21 words
An apparatus according to claim 4 including a check valve in said conducting means to prevent flow away from said anchor-packer.
Claim 8
Dependent Claim
24 words
An apparatus according to claim 4 wherein said passage extends from said mill and along the back side of said whipstock to said anchor-packer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |