Patent US4407411A successfully refreshed from Google Patents.
EP0145537A2
Expired / Lapsed
EP
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Drill stem testing apparatus with multiple pressure sensing ports
Assignee: Schlumberger Technology Corp
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Filing: 1984-11-02
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Granted: —
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Expires: 2004-11-02
Abstract
Abstract in accordance with an illustrative embodiment of the present invention, a drill stem testing apparatus includes a housing leaving a full-opening bore, and a main test valve for opening and closing the bore in order to flow and shut-in the formation interval being tested. The apparatus further includes a first port means for communicating the pressure of fluids in the bore below the test valve to a first pressure transducer, a second port means for communicating the pressure of fluids in the bore above the test valve to a second pressure transducer, and a third port means for communicating the pressure of fluids in the well annulus externally of the housing to a third pressure transducer. The outputs of the respective transducers are fed to a recording gauge so that a pressure record is obtained of the changes in fluid pressure that occur in the bore of the housing above and below the test valve as well as in the annulus externally of the housing.
Inventors
- 👤 James Upchurch
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 03:28
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/087; E21B34/00; E21B34/06; E21B34/10; E21B47/00; E21B47/06; E21B49/001
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
104 words
Well testing apparatus comprising: a housing having a full-opening bore therethrough; valve means for opening'and closing said bore; pressure transducer means mounted in said housing for sensing well fluid pressures and providing an indication thereof; and characterized by: first port means in communication with pressure at a location inside said housing below said valve means; second port means in communication with pressure at a location inside said housing above said valve means; third port means in communication with pressure at a location externally of said housing means, wherein said transducer means communicates with at least one of said first, second, and third port means.
Claim 2
Dependent Claim
104 words
Well testing apparatus comprising: a housing having a full-opening bore therethrough; valve means for opening'and closing said bore; pressure transducer means mounted in said housing for sensing well fluid pressures and providing an indication thereof; and characterized by: first port means in communication with pressure at a location inside said housing below said valve means; second port means in communication with pressure at a location inside said housing above said valve means; third port means in communication with pressure at a location externally of said housing means, wherein said transducer means communicates with at least one of said first, second, and third port means.
Claim 3
Dependent Claim
26 words
The well testing apparatus of Claim 1 characterized by: means for selectively communicating said transducer means with one of said first, second and third port means.
Claim 4
Dependent Claim
42 words
The well testing apparatus of Claim 1 characterized by: a plurality of pressure transducer means, each mounted in said housing in communication with one of said first, second, or third port means for sensing well fluid pressures and providing an indication thereof.
Claim 5
Dependent Claim
59 words
The apparatus of Claim 1, 2, or 3 characterized in that said housing includes a tubular sub, said first port means including a first passage extending longitudinally in the wall of said sub between threaded bores at the opposite ends thereof, said transducer means being mounted in one of said threaded bores and the other threaded bore being open.
Claim 6
Dependent Claim
90 words
The apparatus of Claim 4 characterized by a transverse bore extending in the wall of said sub, said transverse bore intersecting said passage and extending to an exterior opening in the outer surface of said sub, a radial port communicating between the interior bore of said sub and the inner end of said transverse bore, and plug means inserted into said transverse bore through said exterior opening an fixed therein, said plug means preventing communication between said passage and said radial port and between said passage and said exterior opening.
Claim 7
Dependent Claim
78 words
The apparatus of Claim 5 characterized in that said plug means comprises a stem having first and second seal rings mounted thereon, and first seal ring engaging a wall surface of said transverse bore at a location between the point of intersection of said passage with said transverse bore and said exterior opening, said second seal ring engaging a wall surface of said transverse bore between said point of intersection and said inner end of said transverse bore.
Claim 8
Dependent Claim
66 words
The apparatus of Claim 3 characterized in that said housing includes a tubular sub having a central bore, said second port means including a second passage extending longitudinally in the wall of said sub between threaded bores at the opposite ends thereof, said second transducer means being mounted in one of said threaded bores, and a blanking plug engaged in the other of said threaded bores.
Claim 9
Dependent Claim
95 words
The apparatus of Claim 7 characterized by a transverse bore extending in the wall of said sub, said transverse bore intersecting said second passage and extending to an exterior opening in the outer surface of said sub, a radial port communicating between the central bore of said sub and the inner end of said transverse bore, and plug means inserted into said transverse bore through said exterior opening and fixed therein, said plug means preventing communication between said second passage and said radial port and permitting communication between said second passage and said exterior opening.
Claim 10
Dependent Claim
73 words
The apparatus of Claim 8 characterized in that said plug means comprises a stem having a seal ring mounted thereon, said seal ring engaging a wall surface of said transverse bore at a location between the point of intersection of said second passage with said transverse bore and said inner end of said transverse bore, said plug means having means formed therein for communicating said second passage with the exterior of said sub.
Claim 11
Dependent Claim
66 words
The apparatus of Claim 3 characterized in that said housing includes a tubular sub having a central bore, said third port means including a third passage entending longitudinally in the wall of said sub between threaded bores at the opposite end thereof, said third transducer means being mounted in one of said threaded bores, and a blanking plug engaged in the other of said threaded bores.
Claim 12
Dependent Claim
95 words
The apparatus of Claim 10 characterized by a transverse bore extending in the wall of said sub, said transverse bore intersecting said third passage and extending to an exterior opening in the outer surface of said sub, a radial port communicating between the central bore of said sub and the inner end of said transverse bore, and plug means inserted into said transverse bore through said exterior opening and fixed therein, said plug means preventing communication between said third passage and said exterior opening, said third passage and said radial port being in open communication.
Claim 13
Dependent Claim
48 words
The apparatus of Claim 11 characterized in that said plug means comprises a stem having a seal ring mounted thereon, said seal ring engaging a wall surface of said transverse bore between the point of intersection of said third passage with said transverse bore and said exterior opening.
Claim 14
Independent Claim
131 words
A method for use in sensing pressures during a drill stem test of a well, comprising the steps of: inserting an elongated tool string into the well bore to a formation interval at which pressure measurements are to be taken, said elongated tool string including a housing having a full-opening bore therethrough and a valve member for opening and closing said full-opening bore; isolating said formation interval from fluid pressures removed from said formation interval; opening and closing said valve member for predetermined time periods; and measuring pressure of fluids in the well bore below said valve member; and characterized by: measuring pressures of fluids within said tool string and above said valve member concurrently with the step of measuring pressures of fluids in the well bore below said valve member.
Claim 15
Independent Claim
131 words
A method for use in sensing pressures during a drill stem test of a well, comprising the steps of: inserting an elongated tool string into the well bore to a formation interval at which pressure measurements are to be taken, said elongated tool string including a housing having a full-opening bore therethrough and a valve member for opening and closing said full-opening bore; isolating said formation interval from fluid pressures removed from said formation interval; opening and closing said valve member for predetermined time periods; and measuring pressure of fluids in the well bore below said valve member; and characterized by: measuring pressures of fluids within said tool string and above said valve member concurrently with the step of measuring pressures of fluids in the well bore below said valve member.
Claim 16
Dependent Claim
23 words
The method of Claim 13, characterized by the step of: measuring the pressure of fluids within the well annulus above the isolation member.
References Cited (Backward Citations)
No citation records indexed.
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