Method of shutting off a portion of a producing zone in a hydrocarbon producing well
A method of shutting off a portion of a producing zone in a hydrocarbon producing wellbore is described which comprises: pulling the existing production liner; filling up the bottom of the producing wellbore to the level of the bottom of the producing zone desired to be shut off with a non-formation-damaging material which insulates a portion of the producing zone from being shut off and which can be removed from the wellbore; placing and centralizing a pipe in the middle of the wellbore so that the pipe extends through the portion of the producing zone desired to be shut off; forming a cement plug with a cylindrical hole throughout the portion of the producing zone desired to be shut off by cementing the centralized pipe to the wellbore while keeping the interior of the pipe free of cement; drilling a cylindrical hole through the cement plug and drilling out the pipe therein by using the pipe therein to center and guide the drill through the middle of the cement plug; and removing the non-formation-damaging material from the bottom of the wellbore.
- Assignee:
- Texaco Inc., White Plains, NY
- Patent Number(s):
- US 4759408
- OSTI ID:
- 7120448
- Resource Relation:
- Patent File Date: Filed date 8 Jun 1987
- Country of Publication:
- United States
- Language:
- English
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