US3848670A - Valve assembly - Google Patents

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Publication number
US3848670A
US3848670A US00373330A US37333073A US3848670A US 3848670 A US3848670 A US 3848670A US 00373330 A US00373330 A US 00373330A US 37333073 A US37333073 A US 37333073A US 3848670 A US3848670 A US 3848670A
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Prior art keywords
housing
tubular member
wall
shoulder
valve assembly
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US00373330A
Inventor
C Pitts
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Schlumberger Technology Corp
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Dow Chemical Co
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Publication date
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Priority to US00373330A priority Critical patent/US3848670A/en
Priority to CA196,905A priority patent/CA999233A/en
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Assigned to DOWELL SCHLUMBERGER INCORPORATED, reassignment DOWELL SCHLUMBERGER INCORPORATED, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DOWELL SCHLUMBERGER INCORPORATED, 500 GULF FREEWAY, HOUSTON, TEXAS 77001, DOW CHEMICAL COMPANY, THE, 2030 DOW CENTER, ABBOTT ROAD, MIDLAND, MI. 48640
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S137/00—Fluid handling
    • Y10S137/907—Vacuum-actuated valves

Definitions

  • ABSTRACT The invention is a valve assembly which is particularly adapted to be secured within a tubular element such as the casing of an earth well, for example, by means of a suitable positioning assembly such as a packer assembly.
  • the valve assembly includes an outer housing adapted to be coupled at its upper end to a packer assembly or other suitable structure, the outer housing having an inner vcylindrically shaped wall including an under cut part thereof intermediate the ends of the housing.
  • a tubular member having an open upper end, a closed lower end and an outer wall having an outwardly extending shoulder fits within the housing, the outer wall of the tubular member fitting closely but slidably against the inner wall of the housing with the shoulder fitting closely but slidably against said undercut part
  • a port extending through the outer wall of the tubular wall below the shoulder communicates with the undercut part of the housing.
  • the total area of the underside of the shoulder exceeds the remaining cross sectional area of the tubular member.
  • the valve is opened by mechanically applied force to move the tubular member downwardly so the port extends below the inner wall part of the housing within which it had-slidable contact.
  • This invention relates to valve assemblies adapted for use in tubular members such as the casing of earth wells, for example, and particularly to so-called cement retainer valves.
  • Cement retainer valves are commonly used below packers sealed across the casing or well bore where it is desired to introduce cement, under pressure, into that part of the well lying below the packer.
  • the opening and closing of such retainer valves may be accomplished by exerting downward and upward pressure from a device lowered onto and coupling with the retainer valve, by exerting downward force from a device lowered onto the valve device to open the valve, the valve being spring loaded to close on removal of the downward force, or rotation of valve parts with respect to each other is used to open or close the valve.
  • a principal object of this invention is to provide an improved, easy to use valve assembly for use in tubular members.
  • Another object of this invention is to provide an improved, reliable cement retainer valve.
  • a further object of this invention is to provide an improved, easier to use, reliable valve for down hole use in earth wells.
  • a valve assembly including an outer housing adapted to be coupled at its upper end to a packer assembly or other suitable structure, said outer housing having an inner cylindrically shaped wall including an undercut part thereof intermediate the ends of the housing.
  • a tubular member having an open upper end, a closed lower end and an outer wall having an outwardly extending shoulder fits within said outer housing, the outer wall of the tubular member fitting closely but slidably against the inner wall of the housing with the shoulder fitting closely but slidably against said undercut part.
  • the total area of the underside of the shoulder exceeds the interior and the upper end cross sectional area of the tubular member.
  • the valve is opened by mechanically applied force to move the tubular member downwardly so the port extends below the inner wall part of the housing within which it had slidable contact.
  • FIG. 1 is a side elevational view, partly in section, showing a valve assembly in accordance with this invention
  • FIG. 2 is a sectional view taken along line 2-2 of FIG.
  • FIG. 3 is a fragmentary view showing the valve of FIG. 1 in the open position
  • FIG. 4 is a fragmentary view of an alternative valve structure in accordance with this invention.
  • FIGS. 1 to 3 there is shown a pumpable material (usually cement) retainer valve, indicated generally by the numeral 10, comprising an outer housing, indicated generally by the numeral 12, which is adapted to be coupled to the lower end of the mandrel 14 of a well packer assembly.
  • a pumpable material (usually cement) retainer valve indicated generally by the numeral 10
  • an outer housing indicated generally by the numeral 12
  • slip elements 16 are coupled to the upper end of the housing 12, but such an arrangement is not a part of this invention.
  • the housing 12 is an elongated hollow structure having open ends, the lower end part having an array of bores 18 through the side walls.
  • the inner wall of the housing 12 is in three operative diameters, shown as at 20, 22 and 24.
  • the operative lower end of the inner wall, 20, is of the smallest diameter, and the upper end part 24 of the inner wall has the largest diameter and is threaded (as at 26) at its upper end where it is coupled to the mandrel 14.
  • the inner wall section 22 has a diameter intermediate that of the sections 20 and 24.
  • a sleeve 28 fits slidably along the inner wall section 24 and is sealed with respect thereto by the O ring seal 30 disposed in a groove in the outer wall of the sleeve 28.
  • the inner wall 32 of sleeve 28 is of a smaller diameter than the diameter of the inner wall section 22.
  • An elongated hollow member 34 having a closed lower end 36, an open upper end 38 and has atleast one port 40 extending through its side wall near the lower end 36.
  • An outwardly extending shoulder 42 extends from the outer wall 44 at a location intermediate the ends of the member 34 such that when the member is in its most upward closed position the shoulder 42 bears against the lower end 46 of the sleeve 28.
  • the port 40 provides communication between the interior of the member 34 and the space between the outer wall of member 34 and the wall section 22 of the housing 12.
  • Seals 48, 50 and 52 provide sealing contact between the wall of member 34 below and above the section 22 and between the shoulder 42 and wall section 22.
  • the area of the annulus defined by the lower surface 54 of the shoulder 42 exceeds the cross-sectional area of the interior and the upper end surface 48 of the member 34.
  • a cement retainer setting tool (not shown) is lowered at the end of a string of tubing and coupled to the packer assembly and the stinger of the tool is manipulated downwardly to press against the upper end 38 of the member 34, forcing the member 34 downwardly to the position shown in FIG. 3. That is, the bore (or bores) 40 are exposed to that lower part of the housing 12 which contains the bores 18 and which is also open ended. As may be seen in FIGS. 1 and 3, before the bore 40 is totally along the inner wall 20, the seal 48 is below the inner wall 20. This leaves an unsealed path for the release of pressure built up in the space between the inner wall section 22 and the outer wall of the member 34 as the member 34 descends.
  • the cement slurry or other pumpable material may then be injected through the tubing, stinger and the valve of this invention to be deposited in the well below the packer.
  • the vacuum created in the space between the shoulder 54 and the lower end 46 of sleeve 28 causes the valve to close by raising the member 34 so the port(s) 40 are again sealed from the exterior of the tool.
  • FIG. 4 illustrates another embodiment of valve apparatus in accordance with this invention.
  • the housing 112 has an open lower end which is capped by capping member 120.
  • the slidable sleeve 122 has an upper end 126 which is contacted by a stinger (not shown) and has a bore 124 in its side wall. Seals 128, 130, one above and one below the bore 124, provide sealed, slidable contact between the member 122 and the housing 112.
  • the inner wall of the housing 112 is undercut at its lower end part 136 and the member 112 has an outwardly extending shoulder 138 at its lower end.
  • the housing 112 has a bore 118 in its side wall above the wall part 136.
  • An ring seal 132 is provided in the housing 112 just below the bore 118.
  • An 0 ring seal 134 is also provided in the shoulder 138.
  • the bores 124, 118 may be kept in axial alignment by key ways (not shown).
  • the stinger is lifted and the vacuum raises the sleeve to close the valve.
  • a valve assembly adapted for use in a tubular structure, said assembly including a housing adapted to be coupled at one end to a suitable structure disposed across said tubular structure, said housing having an inner cylindrically shaped wall including an undercut part thereof intermediate the ends of the housing,
  • tubular member having an upper end and a lower end and outer wall having an outwardly extending shoulder, said tubular member fitting within said housing, said outer wall of said tubular member fitting closely but slidably against the inner wall of said housing with said shoulder fitting closely but slidably against said undercut part,- said housing and said tubular member each having at least one port extending therethrough, means for maintaining a slidable sealing relationship between said housing and said tubular member between said shoulder and above said undercut part, means for applying a mechanical force through one end of said housing to move said tubular member with respect to said housing whereby said ports communicate with each other and a vacuum is produced in the space between said shoulder and an adjacent undercut part of said housing.
  • valve assembly in accordance with claim 1, wherein means are provided for maintaining a slidable sealing relationship between said at least one port in said tubular member and said housing at least when said valve assembly is in its closed position.
  • valve assembly in accordance with claim 1, wherein said valve assembly is attached to the down hole end of a well packer assembly.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The invention is a valve assembly which is particularly adapted to be secured within a tubular element such as the casing of an earth well, for example, by means of a suitable positioning assembly such as a packer assembly. The valve assembly includes an outer housing adapted to be coupled at its upper end to a packer assembly or other suitable structure, the outer housing having an inner cylindrically shaped wall including an under cut part thereof intermediate the ends of the housing. A tubular member having an open upper end, a closed lower end and an outer wall having an outwardly extending shoulder fits within the housing, the outer wall of the tubular member fitting closely but slidably against the inner wall of the housing with the shoulder fitting closely but slidably against said undercut part. When the valve assembly is in its closed position, a port extending through the outer wall of the tubular wall below the shoulder communicates with the undercut part of the housing. A sealing relationship exists between the housing and tubular member above and below the undercut part and between the shoulder and the undercut part. The total area of the underside of the shoulder exceeds the remaining cross sectional area of the tubular member. The valve is opened by mechanically applied force to move the tubular member downwardly so the port extends below the inner wall part of the housing within which it had slidable contact. Release of the mechanical force permits the vacuum created between the shoulder and the upper end of the undercut part of the housing to close the valve.

Description

[limited States Patent 1 Pitts Nov. 19, 1974 VALVE ASSEMBLY [75] Inventor: Charles A. Pitts, Wichita Falls, Tex.
[73] Assignee: The Dow Chemical Company,
Midland, Mich.
[22] Filed: June 25, 1973 [21] Appl. No.2 373,330
[52] US. Cl 166/224 R, l37/DIG. 8, 251/320 [51] Int. Cl. E21b 43/12, F16k H00 [58] Field of Search 166/224, 224 A; 92/130,
92/134; 251/320, 321; 137/DIG. 8
[56] References Cited UNITED STATES PATENTS 1,684,551 9/1928 Manning 166/154 2,210,815 8/1940 Linney 166/224 2,211,846 8/1940 Brown 166/224 Primary Examiner-James A. Leppink Attorney, Agent, or Firm-Earl D. Ayers [57] ABSTRACT The invention is a valve assembly which is particularly adapted to be secured within a tubular element such as the casing of an earth well, for example, by means of a suitable positioning assembly such as a packer assembly.
The valve assembly includes an outer housing adapted to be coupled at its upper end to a packer assembly or other suitable structure, the outer housing having an inner vcylindrically shaped wall including an under cut part thereof intermediate the ends of the housing.
A tubular member having an open upper end, a closed lower end and an outer wall having an outwardly extending shoulder fits within the housing, the outer wall of the tubular member fitting closely but slidably against the inner wall of the housing with the shoulder fitting closely but slidably against said undercut part When the valve assembly is in its closed position, a port extending through the outer wall of the tubular wall below the shoulder communicates with the undercut part of the housing.
A sealing relationship exists between the housing and tubular member above and below the undercut part and between the shoulder and the undercut part.
The total area of the underside of the shoulder exceeds the remaining cross sectional area of the tubular member.
The valve is opened by mechanically applied force to move the tubular member downwardly so the port extends below the inner wall part of the housing within which it had-slidable contact.
Release of the mechanical force permits the vacuum created between the shoulder and the upper end of the undercut part of the housing to close the valve.
8 Claims, 4 Drawing Figures BACKGROUND OF THE INVENTION This invention relates to valve assemblies adapted for use in tubular members such as the casing of earth wells, for example, and particularly to so-called cement retainer valves.
Cement retainer valves are commonly used below packers sealed across the casing or well bore where it is desired to introduce cement, under pressure, into that part of the well lying below the packer.
The opening and closing of such retainer valves may be accomplished by exerting downward and upward pressure from a device lowered onto and coupling with the retainer valve, by exerting downward force from a device lowered onto the valve device to open the valve, the valve being spring loaded to close on removal of the downward force, or rotation of valve parts with respect to each other is used to open or close the valve.
Many of the prior art valves function well but are somewhat complex to manufacture or to actuate. In addition, utilizing spring loading to close a valve under well conditions is limited because of the size of the springs which can be reasonably accommodated. Also, clogging of material in the space around the springs may result in sluggish movement of the valve mechanism.
OBJECTS OF THE INVENTION A principal object of this invention is to provide an improved, easy to use valve assembly for use in tubular members.
Another object of this invention is to provide an improved, reliable cement retainer valve.
A further object of this invention is to provide an improved, easier to use, reliable valve for down hole use in earth wells.
STATEMENT OF INVENTION In accordance with this invention there is provided a valve assembly including an outer housing adapted to be coupled at its upper end to a packer assembly or other suitable structure, said outer housing having an inner cylindrically shaped wall including an undercut part thereof intermediate the ends of the housing.
A tubular member having an open upper end, a closed lower end and an outer wall having an outwardly extending shoulder fits within said outer housing, the outer wall of the tubular member fitting closely but slidably against the inner wall of the housing with the shoulder fitting closely but slidably against said undercut part.
When the valve assembly is in its closed position a port extending through the outer wall of the tubular wall below the shoulder communicates with the undercut part of the housing.
A sealing relationship exists between the housing and tubular member above and below the undercut part and between the shoulder and the undercut part.
The total area of the underside of the shoulder exceeds the interior and the upper end cross sectional area of the tubular member.
The valve is opened by mechanically applied force to move the tubular member downwardly so the port extends below the inner wall part of the housing within which it had slidable contact.
Release of the mechanical force permits the vacuum created between the shoulder and the upper end of the undercut part of the housing to close the valve.
BRIEF DESCRIPTION OF THE DRAWING The invention, as well as additional objects and advantages thereof, will best be understood when the following detailed description is read in connection with the accompanying drawing, in which:
FIG. 1 is a side elevational view, partly in section, showing a valve assembly in accordance with this invention; v
FIG. 2 is a sectional view taken along line 2-2 of FIG.
FIG. 3 is a fragmentary view showing the valve of FIG. 1 in the open position; and
FIG. 4 is a fragmentary view of an alternative valve structure in accordance with this invention.
DETAILED DESCRIPTION OF THE DRAWINGS Referring to the drawings, and particularly to FIGS. 1 to 3, there is shown a pumpable material (usually cement) retainer valve, indicated generally by the numeral 10, comprising an outer housing, indicated generally by the numeral 12, which is adapted to be coupled to the lower end of the mandrel 14 of a well packer assembly.
In the embodiment shown, slip elements 16 are coupled to the upper end of the housing 12, but such an arrangement is not a part of this invention.
The housing 12 is an elongated hollow structure having open ends, the lower end part having an array of bores 18 through the side walls.
The inner wall of the housing 12 is in three operative diameters, shown as at 20, 22 and 24. The operative lower end of the inner wall, 20, is of the smallest diameter, and the upper end part 24 of the inner wall has the largest diameter and is threaded (as at 26) at its upper end where it is coupled to the mandrel 14.
The inner wall section 22 has a diameter intermediate that of the sections 20 and 24.
A sleeve 28 fits slidably along the inner wall section 24 and is sealed with respect thereto by the O ring seal 30 disposed in a groove in the outer wall of the sleeve 28. The inner wall 32 of sleeve 28 is of a smaller diameter than the diameter of the inner wall section 22.
The wall section 22, with the sleeve 28 in place against the end of the wall section 24, actually functions as an undercut part between the inner wall part of the upper and lower inner wall parts of the housing 12.
An elongated hollow member 34 having a closed lower end 36, an open upper end 38 and has atleast one port 40 extending through its side wall near the lower end 36.
An outwardly extending shoulder 42 extends from the outer wall 44 at a location intermediate the ends of the member 34 such that when the member is in its most upward closed position the shoulder 42 bears against the lower end 46 of the sleeve 28.
With the member 34 in the above-described closed condition, the port 40 provides communication between the interior of the member 34 and the space between the outer wall of member 34 and the wall section 22 of the housing 12.
Seals 48, 50 and 52 provide sealing contact between the wall of member 34 below and above the section 22 and between the shoulder 42 and wall section 22.
The area of the annulus defined by the lower surface 54 of the shoulder 42 exceeds the cross-sectional area of the interior and the upper end surface 48 of the member 34.
OPERATION In operation, a cement retainer setting tool (not shown) is lowered at the end of a string of tubing and coupled to the packer assembly and the stinger of the tool is manipulated downwardly to press against the upper end 38 of the member 34, forcing the member 34 downwardly to the position shown in FIG. 3. That is, the bore (or bores) 40 are exposed to that lower part of the housing 12 which contains the bores 18 and which is also open ended. As may be seen in FIGS. 1 and 3, before the bore 40 is totally along the inner wall 20, the seal 48 is below the inner wall 20. This leaves an unsealed path for the release of pressure built up in the space between the inner wall section 22 and the outer wall of the member 34 as the member 34 descends.
The cement slurry or other pumpable material may then be injected through the tubing, stinger and the valve of this invention to be deposited in the well below the packer.
After the pumpable material has passed through the valve apparatus 10, the vacuum created in the space between the shoulder 54 and the lower end 46 of sleeve 28 causes the valve to close by raising the member 34 so the port(s) 40 are again sealed from the exterior of the tool.
ALTERNATIVE EMBODIMENT FIG. 4 illustrates another embodiment of valve apparatus in accordance with this invention.
The housing 112 has an open lower end which is capped by capping member 120.
The slidable sleeve 122 has an upper end 126 which is contacted by a stinger (not shown) and has a bore 124 in its side wall. Seals 128, 130, one above and one below the bore 124, provide sealed, slidable contact between the member 122 and the housing 112.
The inner wall of the housing 112 is undercut at its lower end part 136 and the member 112 has an outwardly extending shoulder 138 at its lower end.
The housing 112 has a bore 118 in its side wall above the wall part 136. An ring seal 132 is provided in the housing 112 just below the bore 118. An 0 ring seal 134 is also provided in the shoulder 138.
In operation, lowering the stinger (not shown) on the top 126 of the sleeve 122 pushes the sleeve down, lining up the bores 124 and 118 to open the valve. At the same time, a vacuum is created as the shoulder 138 moves downwardly from the upper end of the undercut lower part 136 of the housing.
The bores 124, 118 may be kept in axial alignment by key ways (not shown).
After the pumping through the valve is completed, the stinger is lifted and the vacuum raises the sleeve to close the valve.
What is claimed is:
l. A valve assembly adapted for use in a tubular structure, said assembly including a housing adapted to be coupled at one end to a suitable structure disposed across said tubular structure, said housing having an inner cylindrically shaped wall including an undercut part thereof intermediate the ends of the housing,
a tubular member having an upper end and a lower end and outer wall having an outwardly extending shoulder, said tubular member fitting within said housing, said outer wall of said tubular member fitting closely but slidably against the inner wall of said housing with said shoulder fitting closely but slidably against said undercut part,- said housing and said tubular member each having at least one port extending therethrough, means for maintaining a slidable sealing relationship between said housing and said tubular member between said shoulder and above said undercut part, means for applying a mechanical force through one end of said housing to move said tubular member with respect to said housing whereby said ports communicate with each other and a vacuum is produced in the space between said shoulder and an adjacent undercut part of said housing.
2. A valve assembly in accordance with claim 1, wherein the end of said housing opposite the end to which mechanical force is applied is closed and both ends of said tubular member are open.
3. A valve assembly in accordance with claim 1, wherein both ends of said housing are open and the lower end of said tubular member is closed.
4. A valve assembly in accordance with claim wherein said tubular structure includes a well bore.
5. A valve assembly in accordance with claim wherein said housing includes a sleeve part held fixed position.
6. A valve assembly in accordance with claim 1, wherein means are provided for maintaining a slidable sealing relationship between said at least one port in said tubular member and said housing at least when said valve assembly is in its closed position.
7. A valve assembly in accordance with claim 1, wherein said valve assembly is attached to the down hole end of a well packer assembly.
8. A valve assembly in accordance with claim 1, wherein the transverse cross sectional area of said shoulder is greater than the transverse cross sectional area of the remainder of said tubular member.

Claims (8)

1. A valve assembly adapted for use in a tubular structure, said assembly including a housing adapted to be coupled at one end to a suitable structure disposed across said tubular structure, said housing having an inner cylindrically shaped wall including an undercut part thereof intermediate the ends of the housing, a tubular member having an upper end and a lower end and outer wall having an outwardly extending shoulder, said tubular member fitting within said housing, said outer wall of said tubular member fitting closely but slidably against the inner wall of said housing with said shoulder fitting closely but slidably against said undercut part, said housing and said tubular member each having at least one port extending therethrough, means for maintaining a slidable sealing relationship between said housing and said tubular member between said shoulder and above said undercut part, means for applying a mechanical force through one end of said housing to move said tuBular member with respect to said housing whereby said ports communicate with each other and a vacuum is produced in the space between said shoulder and an adjacent undercut part of said housing.
2. A valve assembly in accordance with claim 1, wherein the end of said housing opposite the end to which mechanical force is applied is closed and both ends of said tubular member are open.
3. A valve assembly in accordance with claim 1, wherein both ends of said housing are open and the lower end of said tubular member is closed.
4. A valve assembly in accordance with claim 1, wherein said tubular structure includes a well bore.
5. A valve assembly in accordance with claim 1, wherein said housing includes a sleeve part held in fixed position.
6. A valve assembly in accordance with claim 1, wherein means are provided for maintaining a slidable sealing relationship between said at least one port in said tubular member and said housing at least when said valve assembly is in its closed position.
7. A valve assembly in accordance with claim 1, wherein said valve assembly is attached to the down hole end of a well packer assembly.
8. A valve assembly in accordance with claim 1, wherein the transverse cross sectional area of said shoulder is greater than the transverse cross sectional area of the remainder of said tubular member.
US00373330A 1973-06-25 1973-06-25 Valve assembly Expired - Lifetime US3848670A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645006A (en) * 1984-12-07 1987-02-24 Tinsley Paul J Annulus access valve system
WO1992018747A1 (en) * 1991-04-23 1992-10-29 Den Norske Stats Oljeselskap A.S Injection valve for injecting chemicals and similar liquid substances into subsurface formations
GB2289117A (en) * 1994-05-04 1995-11-08 Pilot Drilling Control Ltd Downhole telemetry system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684551A (en) * 1927-03-01 1928-09-18 Sanford E Manning Cementing apparatus
US2210815A (en) * 1939-01-23 1940-08-06 Linney Scotty Alton Tool joint pin
US2211846A (en) * 1937-11-26 1940-08-20 Cicero C Brown Valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684551A (en) * 1927-03-01 1928-09-18 Sanford E Manning Cementing apparatus
US2211846A (en) * 1937-11-26 1940-08-20 Cicero C Brown Valve
US2210815A (en) * 1939-01-23 1940-08-06 Linney Scotty Alton Tool joint pin

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645006A (en) * 1984-12-07 1987-02-24 Tinsley Paul J Annulus access valve system
WO1992018747A1 (en) * 1991-04-23 1992-10-29 Den Norske Stats Oljeselskap A.S Injection valve for injecting chemicals and similar liquid substances into subsurface formations
GB2289117A (en) * 1994-05-04 1995-11-08 Pilot Drilling Control Ltd Downhole telemetry system
GB2289117B (en) * 1994-05-04 1998-02-18 Pilot Drilling Control Ltd Telemetry and/or remote operation

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CA999233A (en) 1976-11-02

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