Process for fracturing an underground formation
Patent
·
OSTI ID:6624792
This is a process for fracturing subsurface formation at a predetermined location and orientation. The process involves cutting a circumferential V-shaped notch or cavity in the plane of the desired fracture. The cutting tool is substantially greater in length than width and tapers to a relatively sharp point at its forward end so that it will cut a V-shaped notch in the formation which has a diameter at least as great as that of the borehole and a depth of penetration from the borehole surface at least 1.3 times greater than the width of the notch at the surface of the borehole. Hydraulic pressure is thereafter applied to force fluid into the notch to fracture the formation. Because of the concentration of forces at the apex of the notch, iniation of the fracture is ordinarily accomplished with much lower fluid pressure than has previously been required. (2 claims)
- Assignee:
- TUL; EDB-81-043579
- Patent Number(s):
- US 3211221
- OSTI ID:
- 6624792
- Country of Publication:
- United States
- Language:
- English
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