Whipstock assembly with hydraulically set anchor
Patent
·
OSTI ID:6884445
This patent describes a single-trip whipstock assembly for diverting a well bore for continued production. It comprises: a hydraulically set anchor; a whip attached to an upper end of the anchor; and means for running the whipstock assembly into the well bore; wherein the whipstock assembly is run into the well bore and set within the well bore in a single trip by setting the anchor, the anchor including: an inner mandrel; a slip assembly mounted to the mandrel; and interlock means for preventing retraction of the slip elements form the cased well bore upon elimination of hydraulic fluid pressure. This patent also describes a method of running and setting a whipstock assembly into a cased well bore for changing the direction of a drilling in a single trip. It comprises: running a whipstock assembly into the cased well bore; an inner mandrel having a fluid passageway selectively communication with the hydraulic fluid supply means; a piston cylinder in fluid communication with the fluid passageway of the mandrel; a slip assembly mounted to the mandrel; and interlock means for preventing retraction of the slip elements form the cased well bore upon elimination of hydraulic fluid pressure; positioning the whip stock assembly within the cased well bore at the location for change of direction; setting the whipstock assembly by supplying hydraulic fluid through the supplying means to set the anchor within the cased well bore without sealing the well bore; and running a mill along the whipstock into engagement with the cased well bore to mill an aperture in the casing to facilitate changing the direction of drilling from the cased well bore.
- Assignee:
- MASX Energy Services Group, Inc., Houston, TX (United States)
- Patent Number(s):
- A; US 5154231
- Application Number:
- PPN: US 7-585532
- OSTI ID:
- 6884445
- Country of Publication:
- United States
- Language:
- English
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