Wellbore perforating
This patent describes a method for perforating at least one mineral producing zone in a wellbore in the earth wherein at least one perforating gun is set in the wellbore adjacent at least one zone and then detonated to perforate at least one zone. The wellbore initially containing a wellbore liquid therein adjacent at least one zone, the improvement comprising providing an assembly comprising a packer having a hollow sub fixed thereto which extends below the packer, at least one of the packer and sub having latch means for fixing the sub to production tubing which extends from the sub to the earth's surface. The sub having ports therein below the packer for admitting liquid from the exterior of the sub to the interior of the sub, the sub carrying below the ports seal means for sealing around injection tubing which passes through the interior of the production tubing and is inserted into hollow interior of the sub, the sub carrying below the seal means a hollow housing in essentially longitudinally axial alignment with the sub. The housing being adapted to receive and support internally thereof at least one perforating gun, the housing being sized so that space is provided in at least one location to allow liquid flow from the interior of the sub below the seal means through the space and out from a lower portion of the housing into the wellbore, lowering the assembly into the wellbore on the production tubing, actuating the packer to fix the assembly in the wellbore so that at least one perforating gun in the assembly is adjacent at least one zone to be perforated and so that the portion of the wellbore below the packer is separated in a liquid tight manner from the portion of the wellbore above the packer.
- Assignee:
- Atlantic Richfield Co., Los Angeles, CA
- Patent Number(s):
- US 4760883
- OSTI ID:
- 6517814
- Resource Relation:
- Patent File Date: Filed date 2 Aug 1984
- Country of Publication:
- United States
- Language:
- English
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