Differential pressure test/bypass valve and method for using the same
First Claim
1. A well tool apparatus comprising:
- a tubular housing;
an operating mandrel slidably disposed within said tubular housing having an upper section and a lower section;
a ball valve rotatably disposed within said operating mandrel, said ball valve being normally closed such that there is no internal communication between said upper section of said operating mandrel and said lower section of said operating mandrel so that differential pressure can be maintained across said ball valve; and
a lower mandrel slidably disposed within said tubular housing below said operating mandrel such that when said lower mandrel slides upwardly relative to said tubular housing, said operating mandrel slides downwardly relative to said tubular housing and said ball valve is rotatably operated, thereby creating a blank pipe.
3 Assignments
0 Petitions
Accused Products
Abstract
A well tool apparatus (40) comprising a tubular housing (56) and operating mandrel (58) each having autofill ports (74, 76) and bypass ports (128, 130) therein. The well tool apparatus (40) also comprising a normally closed ball valve (96) rotatably disposed within the operating mandrel (58) preventing communication between the upper section (104) and the lower section (106) of the operating mandrel (58) such that internal pressure above the ball valve (96) greater than internal pressure below the ball valve (96) downwardly urges the operating mandrel (58) allowing pressure testing of the pipe string (32) above the ball valve (96) and such that internal pressure below the ball valve (96) greater than internal pressure above ball valve (96) upwardly urges the operating mandrel (58). The well tool (40) further comprising a lower mandrel (150) disposed within the tubular housing (56) below the operating mandrel (58) that communicates with the well bore (16) through rupture disk port (174) such that sufficient well bore pressure will upwardly urge the lower mandrel (150) allowing operating mandrel (58) to slide downward relative to the tubular housing (56) and lock therein.
44 Citations
35 Claims
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1. A well tool apparatus comprising:
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a tubular housing; an operating mandrel slidably disposed within said tubular housing having an upper section and a lower section; a ball valve rotatably disposed within said operating mandrel, said ball valve being normally closed such that there is no internal communication between said upper section of said operating mandrel and said lower section of said operating mandrel so that differential pressure can be maintained across said ball valve; and a lower mandrel slidably disposed within said tubular housing below said operating mandrel such that when said lower mandrel slides upwardly relative to said tubular housing, said operating mandrel slides downwardly relative to said tubular housing and said ball valve is rotatably operated, thereby creating a blank pipe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A well tool apparatus comprising:
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a tubular housing having an upper portion defining at least one autofill port and having a lower portion defining at least one bypass port, at least one rupture disk port, and an internal passageway terminating in an oil discharge port; an operating mandrel slidably disposed within said tubular housing having an upper section defining at least one autofill port and a lower section defining at least one bypass port, said operating mandrel defining a chamber; a check valve disposed within said chamber of said operating mandrel; means for operating said check valve such that said at least one autofill port in said operating mandrel is selectively in communication with said at least one autofill port in said tubular housing, thereby substantially equalizing the differential pressure across said check valve; a ball valve rotatably disposed within said operating mandrel below said at least one autofill port of said operating mandrel and above said at least one bypass port of said operating mandrel, said ball valve being normally closed preventing internal communication between said upper section of said operating mandrel and said lower section of said operating mandrel so that differential pressure can be maintained across said ball valve; means for downwardly urging said operating mandrel such that said at least one autofill port in said operating mandrel and said at least one autofill port in said tubular housing are no longer in communication and such that said at least one bypass port in said tubular housing and said at least one bypass port in said operating mandrel are no longer in communication; means for placing said at least one bypass port in said operating mandrel in communication with said at least one bypass port of said tubular housing; means for upwardly urging said operating mandrel relative to said tubular housing placing said at least one autofill port in said operating mandrel in selective communication with said at least one autofill port in said tubular housing; a lower mandrel slidably disposes within said lower portion of said tubular housing below said bypass port in said tubular housing; means for upwardly urging said lower mandrel within said tubular housing toward said operating mandrel; and means for activating said operating mandrel such that said operating mandrel slides downwardly relative to said tubular housing, said at least one autofill port in said operating mandrel and said at least one autofill port in said tubular housing are permanently out of communication, said at least one bypass port in said tubular housing and said at least one bypass port in said operating mandrel are permanently out of communication and said ball valve is rotatably operated, thereby creating a blank pipe. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A well tool apparatus comprising:
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a tubular housing; an operating mandrel having a first section and a second section, said operating mandrel slidably disposed within said tubular housing; a valve disposed within said operating mandrel between said first section and said second section, said valve being normally closed for preventing internal communication between said first section of said operating mandrel and said second section of said operating mandrel so that differential pressure can be maintained across said valve; and a lower mandrel slidably disposed within said tubular housing proximate said second section of said operating mandrel such that when said lower mandrel slides relative to said tubular housing, said operating mandrel slides relative to said tubular housing operating said valve to an open position. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A well tool apparatus comprising:
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a tubular housing; an operating mandrel having a first section and a second section, said operating mandrel slidably disposed within said tubular housing; a valve disposed within said operating mandrel between said first section and said second section, said valve being normally closed for preventing internal communication between said first section of said operating mandrel and said second section of said operating mandrel so that differential pressure can be maintained across said valve, said valve being a ball valve that is rotatably disposed within said operating mandrel.
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27. A well tool apparatus comprising:
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a tubular housing defining at least one autofill port; an operating mandrel having a first section and a second section, said operating mandrel slidably disposed within said tubular housing, said first section of said operating mandrel defining at least one autofill port, said at least one autofill port in said tubular housing being in selective communication with said at least one autofill port in said first section of said operating mandrel; and a valve disposed within said operating mandrel between said first section and said second section, said valve being normally closed for preventing internal communication between said first section of said operating mandrel and said second section of said operating mandrel so that differential pressure can be maintained across said valve. - View Dependent Claims (28)
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29. A well tool apparatus comprising:
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a tubular housing defining at least one bypass port; an operating mandrel having a first section and a second section, said operating mandrel slidably disposed within said tubular housing, said second section of said operating mandrel defining at least one bypass port, said at least one bypass port in said tubular housing being in selective communication with said at least one bypass port in said second section of said operating mandrel; and a valve disposed within said operating mandrel between said first section and said second section, said valve being normally closed for preventing internal communication between said first section of said operating mandrel and said second section of said operating mandrel so that differential pressure can be maintained across said valve.
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30. A method for pressure testing a pipe string in a well bore, comprising:
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providing a well tool apparatus for use in said pipe string, said well tool apparatus comprising a tubular housing, an operating mandrel slidably disposed within said tubular housing and a valve operably disposed within said operating mandrel, said operating mandrel having a first section and a second section, said valve located between said first section and said second section; running said pipe string into said well bore; applying pressure within said pipe string and within said first section of said operating mandrel against said valve; sliding said operating mandrel relative to said tubular housing; testing the integrity of said pipe string by applying a testing pressure within said pipe string and within said first section of said operating mandrel against said valve; releasing said testing pressure; applying pressure within said second section of said operating mandrel against said valve; and sliding said operating mandrel relative to said tubular housing. - View Dependent Claims (31, 32, 33, 34, 35)
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Specification