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US 5,396,957 AGranted
Well completions with expandable casing portions
AssigneeHalliburton Company
InventorsJim B. Surjaatmadja, Timothy W. Helton, Danny G. Porter
Life of this patent
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AssigneeHalliburton Company
InventorsJim B. Surjaatmadja, Timothy W. Helton, Danny G. Porter
Estimating the term…
Expandable casing portions are provided, such as casing slip joints or expansion joints, on opposite sides of a fracture initiation location to accommodate casing and formation movement during fracturing of a well. The fracture initiation location provided by forming openings through the well casing and then forming fan-shaped slots in the formation surrounding the casing. These fan-shaped slots circumscribe an angle about the axis of the casing substantially greater than the angle circumscribed by the opening itself through which the slot was formed. These techniques are particularly applicable to fracturing of horizontal wells, but are also useful on vertical wells. The expansion joints formed as tubular members having alternating inner and outer annular grooves. In another embodiment, the expansion joints formed by tubular members defining alternating inner and outer spiral grooves therein.
A method of fracturing a subsurface formation of a well having a well casing cemented in a borehole intersecting said subsurface formation, comprising:
A method of fracturing a subsurface formation of a well having a well casing cemented in a borehole intersecting the subsurface formation, said method comprising:
Dependencies are inferred from the claim text.