CA2102488A1 - Quick-test valve assembly and method - Google Patents
Quick-test valve assembly and methodInfo
- Publication number
- CA2102488A1 CA2102488A1 CA 2102488 CA2102488A CA2102488A1 CA 2102488 A1 CA2102488 A1 CA 2102488A1 CA 2102488 CA2102488 CA 2102488 CA 2102488 A CA2102488 A CA 2102488A CA 2102488 A1 CA2102488 A1 CA 2102488A1
- Authority
- CA
- Canada
- Prior art keywords
- valve
- seat
- closure element
- sliding seal
- flow passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- 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
- F16K3/02—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 flat sealing faces; Packings therefor
- F16K3/0227—Packings
- F16K3/0236—Packings the packing being of a non-resilient material, e.g. ceramic, metal
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Sliding Valves (AREA)
- Examining Or Testing Airtightness (AREA)
- Details Of Valves (AREA)
Abstract
ABSTRACT
A method and apparatus of simultaneously field testing valve body pressure integrity and sealing capability of metal-to-metal, seat-to-body, and seat-to-gate mating surfaces in an opened or closed valve, such as a slab or gate valve, includes the method steps of injecting an externally pressurized testing medium into the valve cavity through an existing port nor normally used for pressure testing, such as a bonnet bleeder fitting or valve body flush and grease injection fittings. The apparatus includes a valve seat having a base and sleeve received in telescoping fashion on either the upstream side or both sides of the valve.
A method and apparatus of simultaneously field testing valve body pressure integrity and sealing capability of metal-to-metal, seat-to-body, and seat-to-gate mating surfaces in an opened or closed valve, such as a slab or gate valve, includes the method steps of injecting an externally pressurized testing medium into the valve cavity through an existing port nor normally used for pressure testing, such as a bonnet bleeder fitting or valve body flush and grease injection fittings. The apparatus includes a valve seat having a base and sleeve received in telescoping fashion on either the upstream side or both sides of the valve.
Description
QUICK-TEST VALVE ASSEMBLY AND METHOD
This invention relates to gate valves, and more particularly to a slab gate assembly and method for pressure testing the basic pressure vessel 5 of a valve body and the pressure controlling capabilities of both the upstream and downstream seat assemblies.
BACKGROUND OF THE INVENTION
Gate valves are pressure control devices generally used during drilling, completion, and production phases of a well. Gate valves are 10 used in onshore, offshore, and subsea applications. Gate valves are typically used in well systems as either annulus valves or tree valves.
Annulus valves are connected to the side outlet of a casing head, casing spool, or tubing head. They provide controlled access to the casing annulus. Tree valves are valves on christmas tree structures that provide 15 control for a well during production. Gate valves are also used in other various control operations.
Periodically, gate valves in the field must be pressure tested.
Specifically, wellhead annulus valves must be tested for pressure vessel integrity of the valve body and pressure retention capability of the seat 20 assemblies. It is desirable to conduct such testing without disconnecting the valve from the wellhead or removing any other flanged connections.
Prior art devioes for bsting annulus valves in the field without removing valve end connections involved the use of complicated wedge gates or split gabs rather than slab gates. Prior art wedge gabs and split 25 gabs tend to be larger and heavier than slab gabs because of the required thickness of the components. They require more separab components than slab gabs. These larger components require larger, heavier housing. They usually are more expensive to manufacture since the mabrial requirements are greabr and because the various 30 components must fit together with very close tolerances. In addition, the prior art wedge and split gate devices utilize springs and small inbgral ~ ~ -pins locabd on the sides of the gates to keep the gab halves together. ~ ~
'',-, ' ~
, . . .. , . ,. ~ ,, "- 2:1.92~88 The use of such small integral pieces limits the durability of such valve assemblies in the harsh conditions of the oilfield.
SUMMARY OF THE IN~VENTION
The present invention provides a slab gate valve assembly that 5 enables quick, safe, and easy field testing of the valve body pressure vessel integrity of an opened or closed valve, while simultaneously testing the pressure sealing capability of the metal-to-metal, seat-to-body, and seat-to-gate mating surfaces on both sides of the valve. Such testing of the present invention gate valve does not require disconnection of flanges 10 or the setting of special valve through~bore plugs, and thus overcomes problems associated with prior art wedge and split gate assemblies and telescoping seat assemblies The present invention includes a slab gate valve assembly which utilizes novel seat assemblies to employ a novel method of simultaneous 15 pressure testing of all valve structure seals when pressure is applied to thebody cavity through an existing port not normally used for pressure testing, such as a bonnet bleeder fitting or valve body flush and grease injecting fittings. The seat assembly is used in a valve assembly typically . comprising a slab gate, a rotatable stem, a bonnet, packing, a cap, a - 20 backseat flange, a valve chamber, seat elements, a flow passage, and a valve body forming a valve body cavity.
The novel seat assembly includes a sliding seal sleeve, a seat body base, a Belleville spring, and a plurality of O-rings. The seat body is inserted into a seat pocket in the valve body. The sliding seal sleeve is 25 fitted over a reduced diameter section of the seat body base and is initiallybiased against the slab gate independently of the seat body base by the Belleville spring. An O-ring provides sealing between the seat body base and the sliding seal sleeve.
When the valve body is tested for pressure vessel integrity and all ~ ;
30 components of both seat assemblies are simultaneously tested for pressure retention, using a special testing procedure where pressure is applied through a port not normally used for pressure application, a testing 2102~88 .
pressure medium, either gas or liquid, is forced under pressure into the valve cavity through the port. The pressure medium is continually pumped into the valve cavity until the desired test pressure is reached. The pressure medium introduced into the valve cavity acts on the outside diameter of the sliding seat seal and a portion of the radial face of the sliding seat seal to combine with the force of the Belleville spring to press the sealing face of the sliding seal sleeve against the gate.
Simultaneously, the pressure medium acts on a shoulder formed by the reduced diameter section of the seat body base to force the seat body base deeper into its seat pocket. O-rings and radial sealing surfaces prevent leakage between seat components and the valve body~ The smooth, flat face of the sliding seal presses against the slab gate surface to form a seal preventing the pressure medium from leaking into the valve runbore. Thus, the runbore or flow passage is sealed off and the valve can be pressure tested when the slab, gate or other valve closure element is in either the opened or closed position.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a sectional view of a single-direction gate valve assembly. -Figure 2 is an enlarged, sectional view of FIG.1, showing a gate and seat assemblies.
Figure 3 is an enlarged, sectional view of a Bi-directional gate valve assembly, showing a gate and seat assemblies.
DESCRIPTON OF THE PREFERRED EMBODIMENTS
A typical slab gate valve 10 is disclosed in FIG.1. The valve includes a valve body 12 having a flow passage 14, a valve cavity 16, and a bonnet 18 secured to the valve body 12 by bolts 20. A bonnet cap 22 is secured to the bonnet 18. A gate 24, shown in an opened position, is -disposed in the valve chamber 16 to control flow through the flow passage ; ~14. a valve stem 26 extends from the gate 24 through the bonnet 18 and -cap 22. The valve stem 26 is threaded at its lower end. A handwheel 28 or other suitable means is provided for rotating the stem 26. Upon rotation ~` 2~02~88 of stem 26, an internally threaded lift pin 30 positioned in a transverse bore 32 of the gate valve 24 is translated along the threaded section of stem 26. In turn, the lift pin 30 is translated to lift or lower gate 24 into an opened or closed position within the valve cavity 16. Above the threaded 5 section of the stem 26 is an annular backseat flange 36 for sealing off the bonnet bore 38 when the lift pin 30 and gate 24 are in an opened position.
Annular packing 34 is provided at the upper end of the bonnet 18 and is retained by a packing nut 40. Seat assemblies 41 and 43 are positioned in seat pockets 42 and 44 of the valve body 12.
The downstream seat assembly 41, shown in FIG.S 1 and 2, is positioned in seat pocket 42 and is in sealing contact with the gate 24 and the valve body 12. A front radial surface 45 is biased into contact with the gate 24 by force provided by Belleville spring 46. An O-ring 47 provides annular sealing between an inner annular surface of the seat pocket 42 and seat assembly 41. A rear radial sealing surface 48 provides a seal between a radial surface of the seat pocket 42.
Positioned in the upstream seat pocket 44 is the novel quick-test seat assembly 43. As shown in FIG.2, the quick-bst seat assembly 42 comprises seat body base 49 and sliding seal sleeve 50. The seat body base 49 is positioned in seat pocket 44 such that a front radial surface 51 of the seat body base 49 is in contact with a radial surface of the seat pocket 44. The sliding seal sleeve 50 is positioned around a reduced diameter section 52 of the seat body base 49. The reduced diameter :
section 52 forms a radial shoulder 53 bridging the reduced diameter section 52 and the remainder of the seat body base 49. An O-ring 54! is provided to form an annular seal between the seat body base 49 and the .: .
seat pocket 44. The sliding seat sleeve 50 is biased against the gate 24 - ::
by a Belleville spring 55. An O-ring 56 provides a seal between the sliding seat sleeve 50 and the seat body base 49.
In operation, simultaneous testing of the body pressure vessel and seat assembly integrity is performed in the following manner: . :
This invention relates to gate valves, and more particularly to a slab gate assembly and method for pressure testing the basic pressure vessel 5 of a valve body and the pressure controlling capabilities of both the upstream and downstream seat assemblies.
BACKGROUND OF THE INVENTION
Gate valves are pressure control devices generally used during drilling, completion, and production phases of a well. Gate valves are 10 used in onshore, offshore, and subsea applications. Gate valves are typically used in well systems as either annulus valves or tree valves.
Annulus valves are connected to the side outlet of a casing head, casing spool, or tubing head. They provide controlled access to the casing annulus. Tree valves are valves on christmas tree structures that provide 15 control for a well during production. Gate valves are also used in other various control operations.
Periodically, gate valves in the field must be pressure tested.
Specifically, wellhead annulus valves must be tested for pressure vessel integrity of the valve body and pressure retention capability of the seat 20 assemblies. It is desirable to conduct such testing without disconnecting the valve from the wellhead or removing any other flanged connections.
Prior art devioes for bsting annulus valves in the field without removing valve end connections involved the use of complicated wedge gates or split gabs rather than slab gates. Prior art wedge gabs and split 25 gabs tend to be larger and heavier than slab gabs because of the required thickness of the components. They require more separab components than slab gabs. These larger components require larger, heavier housing. They usually are more expensive to manufacture since the mabrial requirements are greabr and because the various 30 components must fit together with very close tolerances. In addition, the prior art wedge and split gate devices utilize springs and small inbgral ~ ~ -pins locabd on the sides of the gates to keep the gab halves together. ~ ~
'',-, ' ~
, . . .. , . ,. ~ ,, "- 2:1.92~88 The use of such small integral pieces limits the durability of such valve assemblies in the harsh conditions of the oilfield.
SUMMARY OF THE IN~VENTION
The present invention provides a slab gate valve assembly that 5 enables quick, safe, and easy field testing of the valve body pressure vessel integrity of an opened or closed valve, while simultaneously testing the pressure sealing capability of the metal-to-metal, seat-to-body, and seat-to-gate mating surfaces on both sides of the valve. Such testing of the present invention gate valve does not require disconnection of flanges 10 or the setting of special valve through~bore plugs, and thus overcomes problems associated with prior art wedge and split gate assemblies and telescoping seat assemblies The present invention includes a slab gate valve assembly which utilizes novel seat assemblies to employ a novel method of simultaneous 15 pressure testing of all valve structure seals when pressure is applied to thebody cavity through an existing port not normally used for pressure testing, such as a bonnet bleeder fitting or valve body flush and grease injecting fittings. The seat assembly is used in a valve assembly typically . comprising a slab gate, a rotatable stem, a bonnet, packing, a cap, a - 20 backseat flange, a valve chamber, seat elements, a flow passage, and a valve body forming a valve body cavity.
The novel seat assembly includes a sliding seal sleeve, a seat body base, a Belleville spring, and a plurality of O-rings. The seat body is inserted into a seat pocket in the valve body. The sliding seal sleeve is 25 fitted over a reduced diameter section of the seat body base and is initiallybiased against the slab gate independently of the seat body base by the Belleville spring. An O-ring provides sealing between the seat body base and the sliding seal sleeve.
When the valve body is tested for pressure vessel integrity and all ~ ;
30 components of both seat assemblies are simultaneously tested for pressure retention, using a special testing procedure where pressure is applied through a port not normally used for pressure application, a testing 2102~88 .
pressure medium, either gas or liquid, is forced under pressure into the valve cavity through the port. The pressure medium is continually pumped into the valve cavity until the desired test pressure is reached. The pressure medium introduced into the valve cavity acts on the outside diameter of the sliding seat seal and a portion of the radial face of the sliding seat seal to combine with the force of the Belleville spring to press the sealing face of the sliding seal sleeve against the gate.
Simultaneously, the pressure medium acts on a shoulder formed by the reduced diameter section of the seat body base to force the seat body base deeper into its seat pocket. O-rings and radial sealing surfaces prevent leakage between seat components and the valve body~ The smooth, flat face of the sliding seal presses against the slab gate surface to form a seal preventing the pressure medium from leaking into the valve runbore. Thus, the runbore or flow passage is sealed off and the valve can be pressure tested when the slab, gate or other valve closure element is in either the opened or closed position.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a sectional view of a single-direction gate valve assembly. -Figure 2 is an enlarged, sectional view of FIG.1, showing a gate and seat assemblies.
Figure 3 is an enlarged, sectional view of a Bi-directional gate valve assembly, showing a gate and seat assemblies.
DESCRIPTON OF THE PREFERRED EMBODIMENTS
A typical slab gate valve 10 is disclosed in FIG.1. The valve includes a valve body 12 having a flow passage 14, a valve cavity 16, and a bonnet 18 secured to the valve body 12 by bolts 20. A bonnet cap 22 is secured to the bonnet 18. A gate 24, shown in an opened position, is -disposed in the valve chamber 16 to control flow through the flow passage ; ~14. a valve stem 26 extends from the gate 24 through the bonnet 18 and -cap 22. The valve stem 26 is threaded at its lower end. A handwheel 28 or other suitable means is provided for rotating the stem 26. Upon rotation ~` 2~02~88 of stem 26, an internally threaded lift pin 30 positioned in a transverse bore 32 of the gate valve 24 is translated along the threaded section of stem 26. In turn, the lift pin 30 is translated to lift or lower gate 24 into an opened or closed position within the valve cavity 16. Above the threaded 5 section of the stem 26 is an annular backseat flange 36 for sealing off the bonnet bore 38 when the lift pin 30 and gate 24 are in an opened position.
Annular packing 34 is provided at the upper end of the bonnet 18 and is retained by a packing nut 40. Seat assemblies 41 and 43 are positioned in seat pockets 42 and 44 of the valve body 12.
The downstream seat assembly 41, shown in FIG.S 1 and 2, is positioned in seat pocket 42 and is in sealing contact with the gate 24 and the valve body 12. A front radial surface 45 is biased into contact with the gate 24 by force provided by Belleville spring 46. An O-ring 47 provides annular sealing between an inner annular surface of the seat pocket 42 and seat assembly 41. A rear radial sealing surface 48 provides a seal between a radial surface of the seat pocket 42.
Positioned in the upstream seat pocket 44 is the novel quick-test seat assembly 43. As shown in FIG.2, the quick-bst seat assembly 42 comprises seat body base 49 and sliding seal sleeve 50. The seat body base 49 is positioned in seat pocket 44 such that a front radial surface 51 of the seat body base 49 is in contact with a radial surface of the seat pocket 44. The sliding seal sleeve 50 is positioned around a reduced diameter section 52 of the seat body base 49. The reduced diameter :
section 52 forms a radial shoulder 53 bridging the reduced diameter section 52 and the remainder of the seat body base 49. An O-ring 54! is provided to form an annular seal between the seat body base 49 and the .: .
seat pocket 44. The sliding seat sleeve 50 is biased against the gate 24 - ::
by a Belleville spring 55. An O-ring 56 provides a seal between the sliding seat sleeve 50 and the seat body base 49.
In operation, simultaneous testing of the body pressure vessel and seat assembly integrity is performed in the following manner: . :
2~88 First, the valve bonnet bleeder cap (not shown) is removed so that a hose supplying a pressurized testing medium from an outside source (not shown) can be attached. The valve bonnet bleeder conduit (not shown) provides a passage through which the pressure medium can be introduced into the valve cavity 16. The cavity 16 is slowly filled with the pressure test medium until a desired test pressure is reached. A test pressure medium gage reading is taken to verify the integrity of the valve body and seat assemblies. When the test requirements are satisfied, the test pressure is bled down by opening the valve 10. Finally, the test medium supply hose is disconnected and the bleeder fitting protective cap is replaced.
As the pressure medium is pumped into the cavity 16, the pressure medium acts on the outside diameter of the sliding seat seal 50 and a portion of the radial face of the sliding seat seal to combine with the force of the Belleville spring 55 to press the sealing face of the sliding seal sleeve 50 against the gate 24. Simultaneously, the pressure medium acts on the radial shoulder 53 formed by the reduced diameter section 52 of the seat body base 49 to force the seat body base 49 deeper into its seat pocket 44. O-rings 54, 56 and radial sealing surfaces prevent leakage 20 between seat components and the valve body 12. The radial face of the sliding seal 50 presses against the gate 24 to form a seal preventing the pressure medium from leaking. Thus, the flow passage 14 is sealed off from the body cavity 16 and the valve 10 can be pressure tested in either the opened or closed position.
FIG.3 discloses another embodiment of the present invention. The --embodiment of FIG.3 is an assembly for testing a Bi-directional valve. In the Bi-directional assembly, novel quick-test seat assemblies are placed on both sides of the gate to accommodate upstream or downstream flow from either direction. The components and method of testing for the Bi-directional valve assembly are essentially the same as those of the single-direction valve disclosed in FIG.1.
21~2~88 While the best mode contemplated for carrying out the present invention has been herein shown and described, it will be apparent that ~ ~
modification and variation may be made without departing from what is :
regarded to be the subject matter of the invention.
As the pressure medium is pumped into the cavity 16, the pressure medium acts on the outside diameter of the sliding seat seal 50 and a portion of the radial face of the sliding seat seal to combine with the force of the Belleville spring 55 to press the sealing face of the sliding seal sleeve 50 against the gate 24. Simultaneously, the pressure medium acts on the radial shoulder 53 formed by the reduced diameter section 52 of the seat body base 49 to force the seat body base 49 deeper into its seat pocket 44. O-rings 54, 56 and radial sealing surfaces prevent leakage 20 between seat components and the valve body 12. The radial face of the sliding seal 50 presses against the gate 24 to form a seal preventing the pressure medium from leaking. Thus, the flow passage 14 is sealed off from the body cavity 16 and the valve 10 can be pressure tested in either the opened or closed position.
FIG.3 discloses another embodiment of the present invention. The --embodiment of FIG.3 is an assembly for testing a Bi-directional valve. In the Bi-directional assembly, novel quick-test seat assemblies are placed on both sides of the gate to accommodate upstream or downstream flow from either direction. The components and method of testing for the Bi-directional valve assembly are essentially the same as those of the single-direction valve disclosed in FIG.1.
21~2~88 While the best mode contemplated for carrying out the present invention has been herein shown and described, it will be apparent that ~ ~
modification and variation may be made without departing from what is :
regarded to be the subject matter of the invention.
Claims (16)
1. A quick-test seat assembly comprising:
an open-ended, cylindrical seat base body having radial sealing surfaces on each end;
said seat base body having a first inner diameter and a first outer diameter;
an open-ended, cylindrical sliding seal sleeve having a second inner diameter slightly greater than said first outer diameter;
said sliding seal sleeve having a radial abutment surface and a radial sealing surface;
said sliding seal sleeve being positioned around at least a portion of said seat body base in a telescoping fashion.
an open-ended, cylindrical seat base body having radial sealing surfaces on each end;
said seat base body having a first inner diameter and a first outer diameter;
an open-ended, cylindrical sliding seal sleeve having a second inner diameter slightly greater than said first outer diameter;
said sliding seal sleeve having a radial abutment surface and a radial sealing surface;
said sliding seal sleeve being positioned around at least a portion of said seat body base in a telescoping fashion.
2. A valve comprising a body with a flow passage extending therethrough and a chamber intersected by said flow passage:
a valve closure element positioned in said chamber to control flow through said flow passage;
a bonnet secured to said body and having a bore communicating with said chamber;
a valve stem extending through said bore and connected to said closure member; and means for providing a fluid-tight seal between said body and said valve closure element, said seal means comprising;
an open-ended, cylindrical seat base body having radial sealing surfaces on each end;
said seat base body having a first inner diameter and a first outer diameter;
an open-ended, cylindrical sliding seal sleeve having a second inner diameter slightly greater than said first outer diameter;
said sliding seal sleeve having a radial abutment surface and a radial sealing surface;
said sliding seal sleeve being positioned around at least a portion of said seat body base in a telescoping fashion; wherein said seat base body and said sliding seal assembly being positioned in a seat pocket of said valve body such that said inner diameter of said seat base body is aligned with said flow passage;
at least one of said radial sealing surfaces of said seat base body forms a seal with said valve body; and said sliding seat sleeve is biased toward and into sealing contact with said valve closure element;
a valve closure element positioned in said chamber to control flow through said flow passage;
a bonnet secured to said body and having a bore communicating with said chamber;
a valve stem extending through said bore and connected to said closure member; and means for providing a fluid-tight seal between said body and said valve closure element, said seal means comprising;
an open-ended, cylindrical seat base body having radial sealing surfaces on each end;
said seat base body having a first inner diameter and a first outer diameter;
an open-ended, cylindrical sliding seal sleeve having a second inner diameter slightly greater than said first outer diameter;
said sliding seal sleeve having a radial abutment surface and a radial sealing surface;
said sliding seal sleeve being positioned around at least a portion of said seat body base in a telescoping fashion; wherein said seat base body and said sliding seal assembly being positioned in a seat pocket of said valve body such that said inner diameter of said seat base body is aligned with said flow passage;
at least one of said radial sealing surfaces of said seat base body forms a seal with said valve body; and said sliding seat sleeve is biased toward and into sealing contact with said valve closure element;
3. A valve comprising a body with a flow passage extending therethrough and a chamber intersected by said flow passage:
a valve closure element positioned in said chamber to control flow through said flow passage;
a bonnet secured to said body and having a bore communicating with said chamber;
a valve stem extending through said bore and connected to said closure member; and means for providing a fluid-tight seal between said body and said valve closure element, said seal means comprising at least two seat assemblies, each comprising:
an open-ended, cylindrical sliding seal sleeve having a second inner diameter slightly greater than said first outer diameter;
said sliding seal sleeve having a radial abutment surface and a radial sealing surface;
said sliding seal sleeve being positioned around at least a portion of said seat body base in a telescoping fashion;
said seat base body and said sliding seal assembly being positioned in a seat pocket of said valve body such that said inner diameter of said seat base body is aligned with said flow passage; wherein at least one of said radial sealing surfaces of said seat base body forms a seal with said valve body; and said sliding seat sleeve is biased toward and into sealing contact with said valve closure element;
said seal assemblies are provided on each side of said valve closure element.
a valve closure element positioned in said chamber to control flow through said flow passage;
a bonnet secured to said body and having a bore communicating with said chamber;
a valve stem extending through said bore and connected to said closure member; and means for providing a fluid-tight seal between said body and said valve closure element, said seal means comprising at least two seat assemblies, each comprising:
an open-ended, cylindrical sliding seal sleeve having a second inner diameter slightly greater than said first outer diameter;
said sliding seal sleeve having a radial abutment surface and a radial sealing surface;
said sliding seal sleeve being positioned around at least a portion of said seat body base in a telescoping fashion;
said seat base body and said sliding seal assembly being positioned in a seat pocket of said valve body such that said inner diameter of said seat base body is aligned with said flow passage; wherein at least one of said radial sealing surfaces of said seat base body forms a seal with said valve body; and said sliding seat sleeve is biased toward and into sealing contact with said valve closure element;
said seal assemblies are provided on each side of said valve closure element.
4. A method of simultaneously field testing valve body pressure integrity and pressure sealing capability of metal-to-metal, seat-to-body, and seat-to-gate mating surfaces in a valve wherein said valve comprises a valve closure element and a valve cavity, said method comprising the steps of:
opening an existing port that is in communication with the valve cavity;
injecting a pressurized testing medium through said port and into said valve cavity until a desired test pressure is reached.
opening an existing port that is in communication with the valve cavity;
injecting a pressurized testing medium through said port and into said valve cavity until a desired test pressure is reached.
5. The method according to claim 4, further comprising the step of:
opening the valve closure element to a flow position, thereby bleeding down the test pressure medium.
opening the valve closure element to a flow position, thereby bleeding down the test pressure medium.
6. The method according to claim 4, wherein prior to injecting a pressurized test medium through said port, said method further comprising:
connecting hose supplying a pressurized testing medium from an outside source to said port.
connecting hose supplying a pressurized testing medium from an outside source to said port.
7. The method according to claim 6, comprising the step of:
disconnecting said hose; and closing said port.
disconnecting said hose; and closing said port.
8. The method according to claim 4, wherein said existing port is a bonnet bleeder fitting.
9. The method according to claim 4, wherein said existing port is a valve body flush fitting.
10. The method according to claim 4, wherein said existing port is a grease injection fitting.
11. The method according to claim 4, wherein said valve closure element comprises a slab or gate valve.
12. The method according to claim 4, wherein said valve comprises a uni-directional valve.
13. The method according to claim 4, wherein said valve comprises a bi-directional valve.
14. The method according to claim 4, wherein a test pressure medium gage is connected in communication with said valve cavity to measure said test pressure during testing.
15. The method according to claim 4, wherein prior to the step of opening an existing port that is in communication with the valve capacity, said method further comprising:
closing the valve closure element to a stop-flow position.
closing the valve closure element to a stop-flow position.
16. The method according to claim 4, wherein prior to the step of opening an existing port that is in communication with the valve cavity, said method further comprising:
opening the valve closure element to an open-flow position.
opening the valve closure element to an open-flow position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US97267792A | 1992-11-06 | 1992-11-06 | |
| US07/972,677 | 1992-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2102488A1 true CA2102488A1 (en) | 1994-05-07 |
Family
ID=25519989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2102488 Abandoned CA2102488A1 (en) | 1992-11-06 | 1993-11-04 | Quick-test valve assembly and method |
Country Status (6)
| Country | Link |
|---|---|
| BR (1) | BR9304499A (en) |
| CA (1) | CA2102488A1 (en) |
| FR (1) | FR2697887B1 (en) |
| GB (1) | GB2272271B (en) |
| MX (1) | MX9306900A (en) |
| NO (1) | NO933990L (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7866629B2 (en) | 2006-10-04 | 2011-01-11 | Itt Manufacturing Enterprises, Inc. | Gate valve with streamlined flow |
| CN103038551A (en) * | 2009-08-12 | 2013-04-10 | 通用电气石油和天然气压力控制有限公司 | Gate valve seat |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO328728B1 (en) * | 2006-11-20 | 2010-05-03 | Aker Subsea As | Lock valve for oil and gas production systems |
| CN108956057A (en) * | 2018-09-20 | 2018-12-07 | 中国石油化工股份有限公司 | DBB valve leak detecting device |
| CN109253842B (en) * | 2018-11-21 | 2024-04-19 | 霍山嘉远智能制造有限公司 | Bonnet hydrostatic test frock |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB995456A (en) * | 1961-09-26 | 1965-06-16 | Mcevoy Co | Fluid control valves |
| US3497177A (en) * | 1967-11-02 | 1970-02-24 | Eldon E Hulsey | Seat and seal assembly for valves |
| US4506693A (en) * | 1982-09-27 | 1985-03-26 | Teledyne Industries, Inc. | Pressure regulating valve |
| US4510970A (en) * | 1983-01-10 | 1985-04-16 | Joy Manufacturing Company | Dual seal in-line test valve |
| US5090661A (en) * | 1990-09-28 | 1992-02-25 | Foster Oilfield Equipment Co. | Gate valve |
| US5143348A (en) * | 1991-08-23 | 1992-09-01 | Dwight Baker | Easy-opening, high pressure gate valve |
-
1993
- 1993-10-29 FR FR9312959A patent/FR2697887B1/en not_active Expired - Fee Related
- 1993-11-04 NO NO933990A patent/NO933990L/en unknown
- 1993-11-04 CA CA 2102488 patent/CA2102488A1/en not_active Abandoned
- 1993-11-04 GB GB9322779A patent/GB2272271B/en not_active Expired - Fee Related
- 1993-11-05 MX MX9306900A patent/MX9306900A/en unknown
- 1993-11-05 BR BR9304499A patent/BR9304499A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7866629B2 (en) | 2006-10-04 | 2011-01-11 | Itt Manufacturing Enterprises, Inc. | Gate valve with streamlined flow |
| CN103038551A (en) * | 2009-08-12 | 2013-04-10 | 通用电气石油和天然气压力控制有限公司 | Gate valve seat |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2697887B1 (en) | 1995-06-16 |
| FR2697887A1 (en) | 1994-05-13 |
| GB2272271B (en) | 1996-01-17 |
| GB9322779D0 (en) | 1993-12-22 |
| NO933990D0 (en) | 1993-11-04 |
| BR9304499A (en) | 1994-06-28 |
| GB2272271A (en) | 1994-05-11 |
| MX9306900A (en) | 1995-01-31 |
| NO933990L (en) | 1994-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5355909A (en) | Undersea hydraulic coupling with metal seals | |
| US4294284A (en) | Fail-safe, non-pressure locking gate valve | |
| US4850392A (en) | Double poppet relief valve | |
| US10677389B2 (en) | Check valve | |
| US4452310A (en) | Metal-to-metal high/low pressure seal | |
| US4340088A (en) | Pressure balanced safety valve for wells and flow lines | |
| US5287879A (en) | Hydraulically energized wireline blowout preventer | |
| US6698712B2 (en) | Ball valve assembly | |
| US5137089A (en) | Streamlined flapper valve | |
| US4623020A (en) | Communication joint for use in a well | |
| US5360035A (en) | Pressure balanced poppet valve for hydraulic couplings | |
| US9284809B2 (en) | Apparatus and method for connecting fluid lines | |
| AU674223B2 (en) | Undersea hydraulic coupling with bleed valve | |
| EP0347172A1 (en) | Pressurised check valve | |
| US8393354B2 (en) | Self-sealing hydraulic control line coupling | |
| US5415237A (en) | Control system | |
| US6148920A (en) | Equalizing subsurface safety valve with injection system | |
| US6345668B1 (en) | Tubing hanger having an integral valve gate | |
| WO2021026525A1 (en) | Sealing a gate valve | |
| US11261978B2 (en) | Annulus safety valve system and method | |
| US6536740B2 (en) | Disconnected piston for a valve actuator | |
| CA2102488A1 (en) | Quick-test valve assembly and method | |
| US6543468B2 (en) | Instrument installation and method for testing imperviousness in a high pressure process | |
| EP0587006B1 (en) | Re-energizable valve and valve seats | |
| US4192379A (en) | Blowout preventer and method of insuring prevention of fluid leaks out of a wellhead |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |