skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Perforation and isolation apparatus

Abstract

This patent describes an apparatus for plugging a subterranean well conduit above a perforated zone, consisting of: insertable means in the well conduit above the perforated zone; the insertable means defining a seal bore and a first upwardly facing shoulder above the seal bore and a second downwardly facing shoulder below the seal bore; a plug assembly comprising a central body portion carried by a work string; a downwardly extending sleeve assembly slidably and sealably mounted on the central body portion and secured to the central body portion by a first releasing means; sealing means mounted on the exterior of the sleeve assembly and cooperating with the seal bore in slidable, sealable relationship; means closing the bore of the sleeve assembly; a first radially shiftable latching means mounted on the sleeve assembly below the sealing means, the first latching means are freely passable in one direction through the seal bore and the second shoulder in the nipple but lockingly engagable with the second shoulder upon movement of the sleeve assembly in the nipple in another direction whereby an applied upward force to the central body portion releases the first releasing means; means including a second releasable means for connecting themore » upper portions of the central body portion to a work string; a second radially shiftable latching means mounted on the sleeve assembly and normally positioned in a retracted, inoperative position relative to the first shoulder; means for camming the second radially shiftable latching means outwardly to an engaged position with the first shoulder by upward movement of the central body portion relative to the sleeve assembly subsequent to release activation of the first releasing means, whereby the plug assembly is securely and sealably latched in the nipple and may be left in position by releasing the second releasing means.« less

Inventors:
; ;
Publication Date:
OSTI Identifier:
5601530
Patent Number(s):
US 4576236
Assignee:
Baker Oil Tools, Inc., Orange, CA
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 10 May 1984
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; OIL WELLS; PERFORATION; DRILL BITS; DRILL PIPES; PLUGGING; POSITIONING; SEALS; SLEEVES; WELL COMPLETION; DRILLING EQUIPMENT; EQUIPMENT; PIPES; WELLS; 020300* - Petroleum- Drilling & Production

Citation Formats

Stout, G W, Nelson, J A, and Crisp, J H. Perforation and isolation apparatus. United States: N. p., 1986. Web.
Stout, G W, Nelson, J A, & Crisp, J H. Perforation and isolation apparatus. United States.
Stout, G W, Nelson, J A, and Crisp, J H. Tue . "Perforation and isolation apparatus". United States.
@article{osti_5601530,
title = {Perforation and isolation apparatus},
author = {Stout, G W and Nelson, J A and Crisp, J H},
abstractNote = {This patent describes an apparatus for plugging a subterranean well conduit above a perforated zone, consisting of: insertable means in the well conduit above the perforated zone; the insertable means defining a seal bore and a first upwardly facing shoulder above the seal bore and a second downwardly facing shoulder below the seal bore; a plug assembly comprising a central body portion carried by a work string; a downwardly extending sleeve assembly slidably and sealably mounted on the central body portion and secured to the central body portion by a first releasing means; sealing means mounted on the exterior of the sleeve assembly and cooperating with the seal bore in slidable, sealable relationship; means closing the bore of the sleeve assembly; a first radially shiftable latching means mounted on the sleeve assembly below the sealing means, the first latching means are freely passable in one direction through the seal bore and the second shoulder in the nipple but lockingly engagable with the second shoulder upon movement of the sleeve assembly in the nipple in another direction whereby an applied upward force to the central body portion releases the first releasing means; means including a second releasable means for connecting the upper portions of the central body portion to a work string; a second radially shiftable latching means mounted on the sleeve assembly and normally positioned in a retracted, inoperative position relative to the first shoulder; means for camming the second radially shiftable latching means outwardly to an engaged position with the first shoulder by upward movement of the central body portion relative to the sleeve assembly subsequent to release activation of the first releasing means, whereby the plug assembly is securely and sealably latched in the nipple and may be left in position by releasing the second releasing means.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {3}
}