CN212743955U

CN212743955U - Ultrahigh pressure shale gas pressure wellhead assembly

Info

Publication number: CN212743955U
Application number: CN202021295549.5U
Authority: CN
Inventors: 张必龙; 张艳艳; 丁钢
Original assignee: Yancheng Xudong Machinery Co ltd
Current assignee: Yancheng Xudong Machinery Co ltd
Priority date: 2020-07-04
Filing date: 2020-07-04
Publication date: 2021-03-19
Anticipated expiration: 2030-07-04

Abstract

The utility model discloses an ultrahigh pressure shale gas pressure wellhead device, which comprises a first four-way pipe, a second four-way pipe, two groups of first valves, a second valve, two groups of third valves, two groups of flange blind plates, a plurality of groups of connecting flanges, a plurality of groups of connecting bolts, a plurality of groups of connecting nuts and a first valve, all be provided with seal structure in second valve and the third valve, seal structure includes the valve body, the valve plate, the sealing ring, the pull rod, the screw rod, the seal receptacle, compression spring, gu fixed ring and control seat, be provided with sealed chamber in the valve body, the valve plate is located sealed intracavity, the front end of valve plate is connected with the rear end of pull rod, the front end of pull rod and the rear portion spiral shell dress of screw rod, the front end and the control seat of valve body are passed to the front end of screw rod, pull rod and sealing ring suit, the front end in sealed chamber is provided with the seal groove, the seal ring is located the seal groove, the front end of seal ring is hugged closely with the rear. The utility model discloses, can strengthen the leakproofness at valve position, reduce the waste of shale gas resource, improve the feature of environmental protection.

Description

Ultrahigh pressure shale gas pressure wellhead assembly

Technical Field

The utility model relates to a well head technical field specifically is a super high pressure shale gas pressure well head device.

Background

Shale gas is unconventional natural gas which is endowed in a reservoir rock system mainly containing organic shale, is biochemical cause gas, thermal cause gas or a mixture of the biochemical cause gas and the thermal cause gas which are continuously generated, can exist in natural cracks and pores in a free state, exists on the surfaces of kerogen and clay particles in an adsorption state, and is stored in the kerogen and the asphaltene in a dissolving state in a very small amount, the proportion of the free gas is generally 20-85%, the formation and enrichment of the shale gas have the unique characteristics of the shale gas and are often distributed in a shale hydrocarbon source rock stratum with larger thickness and wide distribution in a basin, compared with the conventional natural gas, the development of the shale gas has the advantages of long mining life and long production period, most of the produced shale gas has wide distribution range and large thickness and generally contains gas, so that the shale gas well can produce gas at a stable rate for a long time, and the valve position of the existing wellhead device is easy to leak in the use process, causing waste of shale gas resources and environmental pollution.

Therefore, an ultrahigh pressure shale gas pressure wellhead device is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an superhigh pressure shale gas pressure well head device can strengthen the leakproofness at valve position, reduces the waste of shale gas resource, has improved the feature of environmental protection to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an ultrahigh pressure shale gas pressure well head device, including first four-way pipe, the second four-way pipe, two sets of first valve, the second valve, two sets of third valve, two sets of flange blind plates, the multiunit flange, multiunit connecting bolt and multiunit coupling nut, the bottom and the coupling flange of first four-way pipe are connected, the left end and the right-hand member of first four-way pipe are connected with two sets of first valve through coupling flange respectively, the top of first four-way pipe passes through coupling flange with the bottom of second valve and is connected, the top of second valve passes through coupling flange and is connected with the bottom of second four-way pipe, the left end and the right-hand member of second four-way pipe pass through coupling flange with two sets of third valve respectively, two sets of flange blind plates pass through coupling bolt with the outside of two sets of first valve respectively, all connect through multiunit coupling bolt and multiunit coupling nut between the multiunit coupling flange, first valve, two sets, The second valve and the third valve are both provided with sealing structures, each sealing structure comprises a valve body, a valve plate, a sealing ring, a pull rod, a screw rod, a sealing seat, a compression spring, a fixing ring and a control seat, a sealing cavity is arranged in each valve body, each valve plate is positioned in each sealing cavity, the front end of each valve plate is connected with the rear end of each pull rod, the front end of each pull rod is screwed with the rear end of each screw rod, the front end of each screw rod penetrates through the front end of each valve body and the corresponding control seat, each pull rod is sleeved with the corresponding sealing ring, the front end of each sealing cavity is provided with a sealing groove, each sealing ring is positioned in each sealing groove, the front end of each sealing ring is tightly attached to the rear end of each sealing seat, the front end of each sealing seat is connected with the rear ends of a plurality of compression springs, the front ends of a plurality of the compression springs are connected with the rear ends of the corresponding, the pull rod is sleeved with the fixing ring, the sealing seat and the sealing ring, and the rear end of the control seat is connected with the front end of the valve body.

Preferably, a plurality of groups of first sealing gaskets are arranged between the connecting flanges, a plurality of groups of sealing gaskets are arranged at two ends of each first sealing gasket, a plurality of groups of connecting flanges are provided with fixing grooves, and the plurality of groups of sealing gaskets are respectively positioned in the fixing grooves.

Preferably, the rear portion of the lateral wall of seal groove is provided with the constant head tank, the lateral wall of sealing ring is provided with the holding ring, the holding ring with constant head tank sliding connection.

Preferably, the pressure gauge further comprises a pressure gauge and a pressure buffer, and the pressure gauge is connected with the top end of the second four-way pipe through the pressure buffer.

Preferably, a second sealing gasket is arranged between the sealing seat and the sealing ring.

Preferably, the lateral wall of screw rod is provided with two sets of snap rings, be provided with two sets of draw-in grooves in the control seat, it is two sets of the snap ring respectively with two sets of draw-in groove sliding connection.

Preferably, the inner side of the sealing ring and the inner side of the sealing seat are both provided with sealing strips, and the two sealing strips are both in sliding connection with the side wall of the pull rod.

Preferably, the front end of the screw is provided with a turntable.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses, the user rotates the screw rod, the rear portion and the pull rod spiral shell dress of screw rod, the screw rod drives the pull rod and removes, the pull rod drives the valve plate and removes, the shale gas of valve plate in with sealed intracavity cuts off, pull rod and solid fixed ring, seal receptacle and sealing ring suit, the sealing ring plays sealed effect between tie rod and the seal groove, gu fixed ring's front end is hugged closely with the seal groove, gu fixed ring's rear end is passed through pressure spring and is connected with the seal receptacle, the rear end and the sealing ring of seal receptacle are connected, pressure spring pushes the seal receptacle backward, sealed effect between seal receptacle and the seal ring has been strengthened, a sealing ring, the seal receptacle, pressure spring and solid fixed ring combined action, wellhead assembly's leakproofness has been strengthened, the possibility of revealing has been reduced wellhead assembly and has taken place, the leakproofness that can strengthen the valve position has been reached.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a partially enlarged cross-sectional structure at a in fig. 1 according to the present invention;

fig. 3 is a schematic diagram of a right-side sectional structure of the sealing structure of the present invention;

fig. 4 is a schematic diagram of a partially enlarged structure at B in fig. 3 according to the present invention.

In the figure: 1. a first four-way pipe; 2. a second four-way pipe; 3. a first valve; 4. a second valve; 5. a third valve; 6. a flange blind plate; 7. a connecting flange; 8. a connecting bolt; 9. a connecting nut; 10. a valve body; 11. a valve plate; 12. a seal ring; 13. a pull rod; 14. a screw; 15. a sealing seat; 16. a compression spring; 17. a fixing ring; 18. a control seat; 19. a first gasket; 20. a seal ring; 21. a positioning ring; 22. a pressure gauge; 23. a pressure buffer; 24. a second gasket; 25. a snap ring; 26. a sealing strip; 27. a turntable.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, the present invention provides a technical solution:

an ultrahigh pressure shale gas pressure wellhead device is shown in figures 1-4 and comprises a first four-way pipe 1, a second four-way pipe 2, two groups of first valves 3, a second valve 4, two groups of third valves 5, two groups of flange blind plates 6, a plurality of groups of connecting flanges 7, a plurality of groups of connecting bolts 8 and a plurality of groups of connecting nuts 9, wherein the bottom end of the first four-way pipe 1 is connected with the connecting flanges 7, the left end and the right end of the first four-way pipe 1 are respectively connected with the two groups of first valves 3 through the connecting flanges 7, the top end of the first four-way pipe 1 is connected with the bottom end of the second valve 4 through the connecting flanges 7, the top end of the second valve 4 is connected with the bottom end of the second four-way pipe 2 through the connecting flanges 7, the left end and the right end of the second four-way pipe 2 are respectively connected with the two groups of third valves 5 through the connecting flanges 7, the two groups of blind plates 6 are respectively connected, the multiple groups of connecting flanges 7 are connected through multiple groups of connecting bolts 8 and multiple groups of connecting nuts 9, sealing structures are arranged in the first valve 3, the second valve 4 and the third valve 5, each sealing structure comprises a valve body 10, a valve plate 11, a sealing ring 12, a pull rod 13, a screw rod 14, a sealing seat 15, a compression spring 16, a fixing ring 17 and a control seat 18, a sealing cavity is arranged in the valve body 10, the valve plate 11 is located in the sealing cavity, the front end of the valve plate 11 is connected with the rear end of the pull rod 13, the front end of the pull rod 13 is screwed with the rear end of the screw rod 14, the front end of the screw rod 14 penetrates through the front end of the valve body 10 and the control seat 18, the pull rod 13 is sleeved with the sealing ring 12, the front end of the sealing cavity is provided with a sealing groove, the sealing ring 12 is located in the sealing groove, and the front end of the sealing ring 12 is tightly attached to the rear, the front end of the sealing seat 15 is connected with the rear ends of a plurality of groups of compression springs 16, the front ends of the plurality of groups of compression springs 16 are connected with the rear end of the fixing ring 17, the front end of the fixing ring 17 is tightly attached to the front wall of the sealing groove, the pull rod 13 is sleeved with the fixing ring 17, the sealing seat 15 and the sealing ring 12, and the rear end of the control seat 18 is connected with the front end of the valve body 10;

specifically, as shown in fig. 2, a plurality of groups of first sealing gaskets 19 are arranged between the connecting flanges 7, a plurality of groups of sealing rings 20 are arranged at two ends of each first sealing gasket 19, a plurality of groups of fixing grooves are arranged on the connecting flanges 7, and the plurality of groups of sealing rings 20 are respectively arranged in the fixing grooves.

Through adopting above-mentioned technical scheme, the emergence of the condition of revealing can be reduced to first sealed 19 and sealing washer 20 between flange 7, has strengthened wellhead assembly's leakproofness.

Specifically, as shown in fig. 4, a positioning groove is disposed at the rear portion of the side wall of the sealing groove, a positioning ring 21 is disposed on the side wall of the sealing ring 12, and the positioning ring 21 is slidably connected to the positioning groove.

Through adopting above-mentioned technical scheme, the constant head tank mutually supports with holding ring 21, plays the positioning action to sealing ring 12, prevents that sealing ring 12 from taking place to slide under the pressure effect, has strengthened wellhead assembly's stability.

Specifically, as shown in fig. 1, the pressure measuring device further includes a pressure gauge 22 and a pressure buffer 23, and the pressure gauge 22 is connected to the top end of the second four-way pipe 2 through the pressure buffer 23.

Through adopting above-mentioned technical scheme, the user can observe the intraoral pressure of manometer 22 to deal with proruption situation, pressure buffer 23 can reduce the damage of pressure to manometer 22, has strengthened wellhead assembly's security, has prolonged wellhead assembly's life.

Specifically, as shown in fig. 4, a second gasket 24 is disposed between the seal seat 15 and the seal ring 12.

Through adopting above-mentioned technical scheme, the emergence of the condition that takes place to leak between sealing ring 12 and the seal receptacle 15 can be reduced to second sealed pad 24, has strengthened wellhead assembly's leakproofness.

Specifically, as shown in fig. 3, two sets of snap rings 25 are disposed on the side wall of the screw 14, two sets of clamping grooves are disposed in the control seat 18, and the two sets of snap rings 25 are respectively connected with the two sets of clamping grooves in a sliding manner.

Through adopting above-mentioned technical scheme, control pedestal 18 passes through snap ring 25 and draw-in groove, with the fixed position of screw rod 14, prevents that screw rod 14 from droing, has strengthened wellhead assembly's stability and reliability.

Specifically, as shown in fig. 3 to 4, sealing strips 26 are respectively disposed on the inner side of the sealing ring 12 and the inner side of the sealing seat 15, and the two groups of sealing strips 26 are both connected with the side wall of the pull rod 13 in a sliding manner.

Through adopting above-mentioned technical scheme, the leakproofness between seal receptacle 15 and sealing ring 12 and pull rod 13 can be strengthened to sealing strip 26, reduces the possibility of revealing taking place between seal receptacle 15 and sealing ring 12 and the pull rod 13, has strengthened wellhead assembly's leakproofness.

Specifically, as shown in fig. 3, a rotary disc 27 is provided at the front end of the screw 14.

Through adopting above-mentioned technical scheme, the user can be through rotating the rotation that carousel 27 comes control screw 14, and labour saving and time saving has strengthened wellhead assembly's convenience.

The working principle is as follows: a user rotates a screw 14, the rear part of the screw 14 is screwed with a pull rod 13, the screw 14 drives the pull rod 13 to move, the pull rod 13 drives a valve plate 11 to move, the valve plate 11 cuts off shale gas in a sealing cavity, the pull rod 13 is sleeved with a fixing ring 17, a sealing seat 15 and a sealing ring 12, the sealing ring 12 plays a sealing role between the pull rod 13 and a sealing groove, the front end of the fixing ring 17 is tightly attached to the sealing groove, the rear end of the fixing ring 17 is connected with the sealing seat 15 through a compression spring 16, the rear end of the sealing seat 15 is connected with the sealing ring 12, the compression spring 16 presses the sealing seat 15 backwards, the sealing effect between the sealing seat 15 and the sealing ring 12 is enhanced, the sealing ring 12, the sealing seat 15, the compression spring 16 and the fixing ring 17 jointly act, the sealing performance of a wellhead device is enhanced, the possibility of leakage of the wellhead device is reduced, the sealing performance of a valve, the environmental protection is improved.

The using method comprises the following steps: the bottom end of the first four-way pipe 1 is connected with the gas well through a connecting flange 7, shale gas is discharged from the third valve 5 through the first four-way pipe 1, the second valve 4 and the second four-way pipe 2, and a user can drive the screw 14 to rotate by rotating the rotary disc 27, so that the opening and closing of the valve are controlled.

The utility model discloses the use of flange 7, flange blind plate 6, pressure spring 16, manometer 22 and pressure buffer 23 and above-mentioned part that adopt all adopts the utility model provides a background data is given, and cooperate the utility model discloses a description of specification, the affiliated technical field personnel can reach its use to obtain corresponding result of use, so do not have the one-to-one disclosure.

The utility model provides a product model is only for the use that this technical scheme goes on according to the structural feature of product, and its product can be adjusted and reform transform after purchasing, makes it match more and accord with the utility model belongs to technical scheme, it is the technical scheme of an optimal application of this technical scheme, and the model of its product can be replaced and reform transform according to the technical parameter of its needs, and it is familiar for technical staff that belongs to in the field, consequently, what technical staff that belongs to in the field can be clear passes through the utility model provides a technical scheme obtains corresponding result of use.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An ultrahigh pressure shale gas pressure wellhead device comprises a first four-way pipe (1), a second four-way pipe (2), two groups of first valves (3), a second valve (4), two groups of third valves (5), two groups of flange blind plates (6), a plurality of groups of connecting flanges (7), a plurality of groups of connecting bolts (8) and a plurality of groups of connecting nuts (9), wherein the bottom end of the first four-way pipe (1) is connected with the connecting flanges (7), the left end and the right end of the first four-way pipe (1) are respectively connected with the two groups of first valves (3) through the connecting flanges (7), the top end of the first four-way pipe (1) is connected with the bottom end of the second valve (4) through the connecting flanges (7), the top end of the second valve (4) is connected with the bottom end of the second four-way pipe (2) through the connecting flanges (7), the left end and the right end of the second four-way pipe (2) are respectively connected with the two groups of third valves (5) through the connecting, two sets of flange blind plates (6) are connected through connecting bolt (8) with the outside of two sets of first valves (3) respectively, all are connected its characterized in that through multiunit connecting bolt (8) and multiunit coupling nut (9) between multiunit flange (7): the sealing structure comprises a valve body (10), a valve plate (11), a sealing ring (12), a pull rod (13), a screw rod (14), a sealing seat (15), a compression spring (16), a fixing ring (17) and a control seat (18), wherein the sealing structure is arranged in the first valve (3), the second valve (4) and the third valve (5) and comprises a valve body (10), a valve plate (11), a sealing ring (12), the pull rod (13), the screw rod (14), a sealing seat (15), a compression spring (16), a fixing ring (17) and the control seat (18), a sealing cavity is arranged in the valve body (10), the valve plate (11) is located in the sealing cavity, the front end of the valve plate (11) is connected with the rear end of the pull rod (13), the front end of the pull rod (13) is in screw assembly with the rear portion of the screw rod (14), the front end of the screw rod (14) penetrates through the front end of the valve body (10, the front end of sealing ring (12) with the rear end of seal receptacle (15) is hugged closely, the front end and the multiunit of seal receptacle (15) the rear end of pressure spring (16) is connected, the multiunit the front end of pressure spring (16) with the rear end of solid fixed ring (17) is connected, the front end of solid fixed ring (17) with the antetheca of seal groove is hugged closely, pull rod (13) with gu fixed ring (17), seal receptacle (15) and sealing ring (12) suit, the rear end of control seat (18) with the front end of valve body (10) is connected.

2. The ultra-high pressure shale gas pressure wellhead assembly of claim 1, wherein: the multi-unit all be provided with first sealed pad (19) between flange (7), the multiunit the both ends of first sealed pad (19) all are provided with sealing washer (20), multiunit flange (7) all are provided with the fixed slot, and the multiunit sealing washer (20) are located the multiunit respectively in the fixed slot.

3. The ultra-high pressure shale gas pressure wellhead assembly of claim 2, wherein: the rear portion of the lateral wall of seal groove is provided with the constant head tank, the lateral wall of sealing ring (12) is provided with holding ring (21), holding ring (21) with constant head tank sliding connection.

4. The ultra-high pressure shale gas pressure wellhead assembly according to claim 3, wherein: the pressure gauge is characterized by further comprising a pressure gauge (22) and a pressure buffer (23), wherein the pressure gauge (22) is connected with the top end of the second four-way pipe (2) through the pressure buffer (23).

5. The ultra-high pressure shale gas pressure wellhead assembly according to claim 4, wherein: and a second sealing gasket (24) is arranged between the sealing seat (15) and the sealing ring (12).

6. The ultra-high pressure shale gas pressure wellhead assembly of claim 5, wherein: the side wall of the screw rod (14) is provided with two groups of clamping rings (25), two groups of clamping grooves are formed in the control seat (18), and the two groups of clamping rings (25) are respectively in sliding connection with the two groups of clamping grooves.

7. The ultra-high pressure shale gas pressure wellhead assembly of claim 6, wherein: the inboard of sealing ring (12), the inboard of seal receptacle (15) all are provided with sealing strip (26), two sets of sealing strip (26) all with the lateral wall sliding connection of pull rod (13).

8. The ultra-high pressure shale gas pressure wellhead assembly of claim 7, wherein: the front end of the screw (14) is provided with a turntable (27).