CN210977380U - Cold and hot extraction alternative wellhead device - Google Patents
Cold and hot extraction alternative wellhead device Download PDFInfo
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- CN210977380U CN210977380U CN202020818747.9U CN202020818747U CN210977380U CN 210977380 U CN210977380 U CN 210977380U CN 202020818747 U CN202020818747 U CN 202020818747U CN 210977380 U CN210977380 U CN 210977380U
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Abstract
The utility model provides a cold and hot extraction alternating wellhead device, which relates to the technical field of hot extraction wellhead devices and comprises a reducing joint, a hanger and a hanger plugging assembly; in the actual operation process, when in the steam injection stage, the hanger plugging assembly is used for plugging and sealing the second through channel of the hanger; when the steam injection stage is converted into the electric pump oil extraction stage, the hanger plugging assembly is detached, and the cable extends into the oil pipe head along the first through passage and the second through passage; the utility model discloses an only adopt one set of reducing to connect and hanger at steam injection and the alternative in-process of charge pump oil recovery, only need to block up the assembly to the hanger install or demolish can, alleviate the reducing that exists among the prior art need be changed when cold and hot production conversion and connect and hanger, the work load when leading to changing is big, difficult operation to and cause the higher technical problem of cost, improved the convenience of work.
Description
Technical Field
The utility model belongs to the technical field of thermal recovery wellhead assembly technique and specifically relates to a cold and hot production well head device in turn is related to.
Background
With the shortage of global petroleum resources and the demand for clean energy, the exploitation and utilization of thick oil and geothermal resources are increased in all countries in the world. More than 70% of the existing petroleum resources are thick oil, ultra-thick oil and asphalt resources, and the steam huff and puff thermal recovery technology is mostly adopted for the thick oil recovery.
The cable crossing wellhead device in the prior art is provided with two sets of reducing joints and hangers, wherein the steam injection reducing joint is arranged in the oil pipe head during steam injection, and the upper part of the oil pipe head is connected with the steam injection hanger; when the electric pump produces oil, the oil production reducing joint is installed in the oil pipe head, and the upper part of the oil pipe head is connected with the oil production hanger.
However, in the prior art, the cable crossing wellhead device needs to replace the reducing joint and the hanger during cold-hot production conversion, and is limited by an offshore platform when the offshore platform is applied, so that the workload during replacement is large and the operation is difficult; meanwhile, each set of wellhead must be equipped with two sets of reducing joints and hangers, and the cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cold and hot well head device in turn of adopting to alleviate the reducing joint and the hanger that need be changed when cold and hot adopting the conversion that exist among the prior art, the work load when leading to changing is big, difficult operation, and cause the higher technical problem of cost.
The utility model provides a pair of cold and hot well head device in turn of adopting for pass through the cable, include: the reducing connector, the hanger and the hanger plugging assembly;
the hanger is used for being installed on an oil pipe head, the reducing joint is connected with one end, far away from a four-way joint of the oil pipe head, of the hanger, and an oil production channel is arranged in a penetrating mode between the reducing joint and the hanger;
the eccentric position of the reducing joint relative to the oil production channel is provided with a first through channel, the eccentric position of the hanger relative to the oil production channel is provided with a second through channel, and the cable sequentially passes through the first through channel and the second through channel;
the hanger plugging assembly is used for being inserted into a second through channel of the hanger so as to plug and seal the second through channel.
In a preferred embodiment of the present invention, the present invention further comprises a reducing joint plugging assembly;
the reducing joint plugging assembly is used for being inserted into a first through channel of the reducing joint so as to plug and seal the first through channel.
In a preferred embodiment of the present invention, the reducing union plugging assembly includes a first plug and a first sealing member;
the first plug is inserted into the first through channel, and the first sealing element is located between the outer side wall of the first plug and the inner wall of the first through channel and used for sealing the first through channel.
In the preferred embodiment of the present invention, the utility model further comprises a first gasket and a second gasket;
the first plug comprises a first connecting bolt and a first nut; the first connecting bolt is inserted into the first through channel, and the first gasket, the first sealing element and the second gasket are sequentially sleeved outside the first connecting bolt, so that the first gasket, the first sealing element and the second gasket are positioned between the first connecting bolt and the inner wall of the first through channel;
the first nut is connected with one end, extending out of the first through channel, of the first connecting bolt, the first nut is abutted to the second gasket, and the first nut is used for applying a compression acting force to the first sealing element.
In a preferred embodiment of the present invention, the hanger plug assembly includes a second plug and a second seal;
the second plug is inserted into the second through channel, and the second sealing element is located between the outer side wall of the second plug and the inner wall of the second through channel and used for sealing the second through channel.
In the preferred embodiment of the present invention, the utility model further comprises a third gasket and a fourth gasket;
the second plug comprises a second connecting bolt and a second nut; the second connecting bolt is inserted into the second through channel, and the third gasket, the second sealing element and the fourth gasket are sequentially sleeved outside the second connecting bolt, so that the third gasket, the second sealing element and the fourth gasket are positioned between the second connecting bolt and the inner wall of the second through channel;
the second nut is connected with one end, extending out of the second through channel, of the second connecting bolt, is abutted against the fourth gasket, and is used for applying a compression acting force to the second sealing element.
In the preferred embodiment of the present invention, the reducing joint and the hanger can be detachably connected, and an accommodating space is provided between the reducing joint and the hanger, the accommodating space is located between the first passage and the second passage, the head of the first connecting bolt and the head of the second connecting bolt are both located in the accommodating space, and the head of the first connecting bolt and the edge of the reducing joint abut against each other, and the head of the second connecting bolt and the edge of the hanger abut against each other.
In a preferred embodiment of the present invention, the first sealing member comprises a graphite seal;
the second seal comprises a graphite seal.
The utility model provides a pair of cold and hot well head device in turn of adopting for pass through the cable, include: the reducing connector, the hanger and the hanger plugging assembly; the hanger is installed on the oil pipe head, the reducing joint is connected with one end, far away from the oil pipe head, of the hanger, the reducing joint and the hanger are provided with an oil extraction channel in a penetrating mode, oil extraction equipment can be placed into the underground through the oil extraction channel, and in the actual operation process, when the steam injection stage is achieved, the hanger is used for plugging and sealing a second penetrating channel of the hanger through the hanger plugging assembly; when the steam injection stage is converted into the electric pump oil extraction stage, the hanger plugging assembly is detached, and the cable extends into the oil pipe head along the first through passage and the second through passage; the utility model discloses an only adopt one set of reducing to connect and hanger at steam injection and the alternative in-process of charge pump oil recovery, only need to block up the assembly to the hanger install or demolish can, alleviate the reducing that exists among the prior art need be changed when cold and hot production conversion and connect and hanger, the work load when leading to changing is big, difficult operation to and cause the higher technical problem of cost, improved the convenience of work.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electric pump oil production stage of a cold and hot production alternating wellhead device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cold and hot production alternating wellhead device in a steam injection stage according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a reducing joint plugging assembly of a cold and hot production alternating wellhead device provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a hanger plugging assembly of a cold and hot production alternating wellhead assembly according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a cable crossing device of a cold and hot production alternating wellhead device provided by an embodiment of the present invention.
Icon: 100-a cable; 200-reducing joint; 201-a first pass-through channel; 300-a hanger; 301-a second pass-through channel; 500-tubing head; 600-a cable crossing device; 601-a cable crossing device body; 602-angle plug; 700-reducing joint plugging assembly; 701-a first plug; 711-first connecting bolt; 721-a first nut; 702-a first seal; 703-a first gasket; 704-a second shim; 800-hanger plugging assembly; 801-second plug; 811-a second connecting bolt; 821-a second nut; 802-a second seal; 803-third spacer; 804-a fourth gasket; 900-accommodating space.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
It should be noted that, in the prior art, the two reducing joints and the hanger in the prior art, wherein both the steam injection reducing joint and the steam injection hanger are of a positive center structure, and both the oil extraction reducing joint and the oil extraction hanger are of an eccentric structure, in actual operation, in order to ensure that the butt joint position of the flow pipeline of the overall structure is unchanged, the oil extraction vertical flank is required to be provided with an offset adjusting flange, and the offset adjusting flange needs to be disassembled and assembled during cold-hot oil extraction conversion every time, so that the overall workload is increased, and the working efficiency is affected; in order to alleviate the above-mentioned technical problems, the present embodiment provides a cold and hot production alternating wellhead device.
As shown in fig. 1-5, the present embodiment provides a cold and hot production alternating wellhead for traversing a wireline 100, comprising: the reducing union 200, the hanger 300 and the hanger plugging assembly 800; the hanger 300 is used for being installed on a four-way of the tubing head 500, the reducing joint 200 is connected with one end, away from the four-way of the tubing head 500, of the hanger 300, and an oil production channel is arranged between the reducing joint 200 and the hanger 300 in a penetrating mode; the eccentric position of the reducing joint 200 relative to the production channel is provided with a first through channel 201, the eccentric position of the hanger 300 relative to the production channel is provided with a second through channel 301, and the cable 100 sequentially passes through the first through channel 201 and the second through channel 301; the hanger plugging assembly 800 is adapted to be inserted into the second through passage 301 of the hanger 300 to plug and seal the second through passage 301.
Wherein the hanger 300 and the reducing sub 200 together form a wellhead assembly for a cold and hot production wellhead, the hanger 300 is used for mounting on the tubing head 500, preferably the hanger 300 is used for mounting on a cross-joint of the tubing head 500, in addition, the reducing sub 200 is connected with the hanger 300, and the reducing sub 200 can be screwed with the tubing head 500, so that the hanger 300 and the reducing sub 200 form a wellhead assembly for a production well.
Optionally, the reducing union 200 and the hanger 300 penetrate through a formed oil production channel, and can convey hot gas or perform oil production action downhole; when the electric pump is used for oil production, the cable 100 needs to be conveyed to the underground, at the moment, the eccentric position of the reducing joint 200 relative to the oil production channel is provided with a first through channel 201, the eccentric position of the hanger 300 relative to the oil production channel is provided with a second through channel 301, the cable 100 penetrates into the underground position through sequentially passing through the first through channel 201 and the second through channel 301, and then the input of the cable 100 of the electric pump can be ensured; when in a gas injection stage, at the moment, the oil extraction channel is required to be used for conveying hot steam to the underground, so that the overall sealing performance of the wellhead device is required, at the moment, the cable 100 is taken out of the first through channel 201 and the second through channel 301, the hanger plugging assembly 800 is connected in the second through channel 301 in a sealing mode, the hanger plugging assembly 800 can be used for sealing the second through channel 301, and further the wellhead device is enabled to be in a sealing state except for the oil extraction channel, in the embodiment, the opening or sealing of the second through channel 301 of the hanger 300 can be controlled through the hanger plugging assembly 800 through the hanger 300 and the reducing connector 200, the reducing connector 200 and the hanger 300 do not need to be replaced, the workload of field operation is reduced, and the working convenience is improved; the same reducing joint 200 and the same hanger 300 are used in the two states, the reducing joint 200 and the hanger 300 do not need to be additionally arranged, and the cost is reduced; in the steam injection state and the electric pump oil extraction state, the reducing joint 200 and the hanger 300 are both in an eccentric structure, and the two states have no influence on the butt joint position of a flow pipeline when alternating, so that an offset adjusting flange does not need to be designed.
The embodiment provides a cold and hot production alternating wellhead device for traversing a cable 100, which comprises: the reducing union 200, the hanger 300 and the hanger plugging assembly 800; the hanger 300 is installed on the tubing head 500, the reducing joint 200 is connected with one end, away from the tubing head 500, of the hanger 300, an oil extraction channel penetrates through the reducing joint 200 and the hanger 300, oil extraction equipment can be placed into the underground through the oil extraction channel, and in the actual operation process, when in a steam injection stage, the hanger plugging assembly 800 is used for plugging and sealing the second through channel 301 of the hanger 300; when switching from the steam injection phase to the electric pump production phase, the hanger plug assembly 800 is removed, and the cable 100 is extended into the tubing head 500 along the first traversing channel 201 and the second traversing channel 301; this embodiment only adopts one set of reducing to connect 200 and hanger 300 through the in-process in turn of annotating vapour and electric pump oil recovery, only need to block up assembly 800 to the hanger install or demolish can, alleviate that exist among the prior art need change reducing to connect 200 and hanger 300 when cold and hot adopting the conversion, the work load when leading to changing is big, difficult operation to and cause the higher technical problem of cost, improved the convenience of work.
On the basis of the above embodiments, further, in a preferred embodiment of the present invention, the cable traversing device 600 is further included; the first through channel 201 and the second through channel 301 are concentrically arranged, the cable penetrator 600 is used for being sequentially inserted into the first through channel 201 and the second through channel 301, and the cable penetrator 600 is hermetically connected with the first through channel 201 and the second through channel 301 respectively; the cable passthrough 600 is provided with a cable passage for passing the through cable 100.
Optionally, since the cable 100 needs to pass through the first passing channel 201 and the second passing channel 301 in sequence to enter the interior of the thermal recovery wellhead, the first passing channel 201 and the second passing channel 301 are concentrically arranged, so that the cable 100 is not bent in the passing process, and meanwhile, the cable 100 is fixed on the cable passing device 600, so that the overall sealing performance of the cable 100 during passing can be better ensured on the basis of the unobstructed inner channel of the cable 100.
In the preferred embodiment of the present invention, the cable traversing device 600 comprises a cable traversing device main body 601 and a bending plug 602; one end of the cable traversing device main body 601, which extends out of the reducing joint 200, is connected with the angle plug 602, and the cable 100 extends into the cable 100 channel of the cable traversing device main body 601 through the angle plug 602.
In this embodiment, the lower end of the cable pass-through device main body 601 is inserted into the first pass-through channel 201, when the cable pass-through device main body 601 extends into the first pass-through channel 201, the reducing joint 200 carries the cable pass-through device main body 601 to extend into the second pass-through channel 301, and the reducing joint 200 is connected with the hanger 300, and after the connection of the integral structure is completed, the angle plug 602 is tightened on the cable pass-through device main body 601, so as to complete the fixing and sealing of the cable 100. It should be noted that, since the cable crossing device main body 601 and the angle plug 602 are of the prior art structure, the structure of the cable crossing device 600 will not be described herein.
In the preferred embodiment of the present invention, the present invention further comprises a reducing joint plugging assembly 700; the reducing joint plugging assembly 700 is configured to be inserted into the first through passage 201 of the reducing joint 200 to plug and seal the first through passage 201.
In this embodiment, during the gas injection stage, at this time, the oil recovery channel needs to be used to convey hot steam downhole, so that the overall sealing performance of the wellhead device is needed, at this time, the cable 100 is taken out of the first through channel 201 and the second through channel 301, the reducing joint plugging assembly 700 is hermetically connected in the first through channel 201, the reducing joint plugging assembly 700 can be used to close the first through channel 201, so that the wellhead device except the oil recovery channel has an overall structure in a sealed state, in this embodiment, by using a set of hanger 300 and reducing joint 200, the opening or sealing of the second through channel 301 of the hanger 300 can be controlled by the hanger plugging assembly 800, and the opening or sealing of the first through channel 201 of the hanger 300 can be controlled by the reducing joint plugging assembly 700; double sealing of the reducing joint 200 and the hanger 300 is realized, so that the reducing joint 200 and the hanger 300 do not need to be replaced, the workload of field operation is reduced, and the working convenience is improved; the same reducing joint 200 and the same hanger 300 are used in the two states, the reducing joint 200 and the hanger 300 do not need to be additionally arranged, and the cost is reduced; in the steam injection state and the electric pump oil extraction state, the reducing joint 200 and the hanger 300 are both in an eccentric structure, and the two states have no influence on the butt joint position of a flow pipeline when alternating, so that an offset adjusting flange does not need to be designed.
In the preferred embodiment of the present invention, the reducing union plugging assembly 700 comprises a first plug 701 and a first sealing member 702; the first stopper 701 is inserted into the first through channel 201, and the first sealing member 702 is located between an outer side wall of the first stopper 701 and an inner wall of the first through channel 201, and is used for sealing the first through channel 201.
Optionally, the first plug 701 may adopt a connection screw, an elastic telescopic rod, a locking rod, or the like, preferably, the first plug 701 adopts a connection screw, a first sealing element 702 is sleeved outside the first plug 701, and the first passing through channel 201 is sealed by the first sealing element 702 and the first plug 701.
In the preferred embodiment of the present invention, the present invention further comprises a first gasket 703 and a second gasket 704; the first plug 701 includes a first connection bolt 711 and a first nut 721; the first connecting bolt 711 is inserted into the first through channel 201, and the first gasket 703, the first sealing element 702 and the second gasket 704 are sequentially sleeved outside the first connecting bolt 711, so that the first gasket 703, the first sealing element 702 and the second gasket 704 are positioned between the first connecting bolt 711 and the inner wall of the first through channel 201; the first nut 721 is connected to one end of the first connecting bolt 711 extending out of the first through channel 201, the first nut 721 abuts against the second gasket 704, and the first nut 721 is used for applying a compression force to the first sealing member 702.
In this embodiment, when the reducing joint plugging assembly 700 is installed, the first connecting bolt 711 is installed in the first passing channel 201 of the reducing joint 200, and then the first gasket 703, the first sealing member 702 and the second gasket 704 are sequentially installed, at this time, the first gasket 703, the first sealing member 702 and the second gasket 704 are all sleeved outside the first connecting bolt 711, and finally, the first nut 721 is connected to the first connecting bolt 711 through threads, and the first nut 721 is tightened, so that the first sealing member 702 is ensured to have sufficient compression through the action of the first gasket 703 and the second gasket 704, and the first passing channel 201 is sealed.
In the preferred embodiment of the present invention, the hanger plug assembly 800 includes a second plug 801 and a second seal 802; the second plug 801 is inserted into the second through channel 301, and the second sealing element 802 is located between an outer side wall of the second plug 801 and an inner wall of the second through channel 301, and is used for sealing the second through channel 301.
Optionally, the second plug 801 may adopt a connection screw, an elastic telescopic rod, a locking rod, or the like, preferably, the second plug 801 adopts a connection screw, a second sealing element 802 is sleeved outside the second plug 801, and the second passing channel 301 is sealed and blocked by the second sealing element 802 and the second plug 801.
In the preferred embodiment of the present invention, the present invention further comprises a third gasket 803 and a fourth gasket 804; the second plug 801 includes a second coupling bolt 811 and a second nut 821; a second connecting bolt 811 is inserted into the second through channel 301, and a third gasket 803, a second sealing element 802 and a fourth gasket 804 are sequentially sleeved outside the second connecting bolt 811, so that the third gasket 803, the second sealing element 802 and the fourth gasket 804 are all positioned between the second connecting bolt 811 and the inner wall of the second through channel 301; the second nut 821 is connected to one end of the second connecting bolt 811 extending out of the second through passage 301, and the second nut 821 abuts against the fourth gasket 804, and the second nut 821 is used for applying a compressive force to the second seal 802.
In this embodiment, when the hanger plug assembly 800 is installed, the second connecting bolt 811 is installed in the second through channel 301 of the hanger 300, and then the third gasket 803, the second sealing member 802 and the fourth gasket 804 are sequentially installed, at this time, the third gasket 803, the second sealing member 802 and the fourth gasket 804 are all sleeved outside the second connecting bolt 811, and finally, the second nut 821 is connected to the second connecting bolt 811 through threads, the second nut 821 is tightened, and the second sealing member 802 is ensured to have sufficient compression amount through the action of the third gasket 803 and the fourth gasket 804, so that the second through channel 301 is sealed.
In a preferred embodiment of the present invention, the first sealing member 702 comprises a graphite seal; the second seal 802 comprises a graphite seal; alternatively, the graphite seal can adopt a flexible graphite seal, and the sealing performance at high temperature can be ensured.
In the preferred embodiment of the present invention, the reducing joint 200 is detachably connected to the hanger 300, and an accommodating space 900 is provided between the reducing joint 200 and the hanger 300, the accommodating space 900 is located between the first through channel 201 and the second through channel 301, the head of the second connecting bolt 811 is located in the accommodating space 900, and the head of the second connecting bolt 811 abuts against the edge of the hanger 300; the accommodating space 900 can be used for ensuring the clamping connection of the second connecting bolt 811, and meanwhile, the operation is more convenient.
In this embodiment, when the wellhead apparatus provided in this embodiment is switched from the steam injection stage to the electric pump oil extraction stage, the reducing joint 200 is first detached, the hanger 300 is lifted up, and the reducing joint plugging assembly 700 and the hanger plugging assembly 800 are respectively detached; installing the cable traversing device main body 601 in a second traversing channel 301 of the hanger 300, then seating the hanger 300 on a four-way inner hole step of the oil pipe head 500, aligning the reducing joint 200 with the cable traversing device main body 601 and the hanger 300, installing the reducing joint on the four-way of the oil pipe head 500, and finally tightening the bent plug 602 on the cable traversing device main body 601; thus, the conversion from the steam injection state to the electric pump oil extraction state is completed.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. A cold and hot production alternating wellhead for traversing a wireline, comprising: the reducing connector, the hanger and the hanger plugging assembly;
the hanger is used for being installed on an oil pipe head, the reducing joint is connected with one end, far away from the oil pipe head, of the hanger, and an oil production channel is arranged between the reducing joint and the hanger in a penetrating mode;
the eccentric position of the reducing joint relative to the oil production channel is provided with a first through channel, the eccentric position of the hanger relative to the oil production channel is provided with a second through channel, and the cable sequentially passes through the first through channel and the second through channel;
the hanger plugging assembly is used for being inserted into a second through channel of the hanger so as to plug and seal the second through channel.
2. The alternating cold and hot production wellhead assembly according to claim 1, further comprising a reducing union plugging assembly;
the reducing joint plugging assembly is used for being inserted into a first through channel of the reducing joint so as to plug and seal the first through channel.
3. A cold and hot alternating wellhead assembly according to claim 2 in which the reducing sub plugging assembly includes a first plug and a first seal;
the first plug is inserted into the first through channel, and the first sealing element is located between the outer side wall of the first plug and the inner wall of the first through channel and used for sealing the first through channel.
4. The alternating cold and hot production wellhead assembly according to claim 3, wherein the reducing union plugging assembly further comprises a first gasket and a second gasket;
the first plug comprises a first connecting bolt and a first nut; the first connecting bolt is inserted into the first through channel, and the first gasket, the first sealing element and the second gasket are sequentially sleeved outside the first connecting bolt, so that the first gasket, the first sealing element and the second gasket are positioned between the first connecting bolt and the inner wall of the first through channel;
the first nut is connected with one end, extending out of the first through channel, of the first connecting bolt, the first nut is abutted to the second gasket, and the first nut is used for applying a compression acting force to the first sealing element.
5. The alternating cold and hot production wellhead assembly according to claim 4, wherein the hanger plugging assembly comprises a second plug and a second seal;
the second plug is inserted into the second through channel, and the second sealing element is located between the outer side wall of the second plug and the inner wall of the second through channel and used for sealing the second through channel.
6. The alternating cold and hot production wellhead assembly according to claim 5, wherein the hanger plugging assembly further comprises a third gasket and a fourth gasket;
the second plug comprises a second connecting bolt and a second nut; the second connecting bolt is inserted into the second through channel, and the third gasket, the second sealing element and the fourth gasket are sequentially sleeved outside the second connecting bolt, so that the third gasket, the second sealing element and the fourth gasket are positioned between the second connecting bolt and the inner wall of the second through channel;
the second nut is connected with one end, extending out of the second through channel, of the second connecting bolt, is abutted against the fourth gasket, and is used for applying a compression acting force to the second sealing element.
7. The alternating cold and hot production wellhead assembly according to claim 6, wherein the reducing joint is detachably connected with the hanger, an accommodating space is arranged between the reducing joint and the hanger, the accommodating space is located between the first through channel and the second through channel, the head of the first connecting bolt and the head of the second connecting bolt are located in the accommodating space, the head of the first connecting bolt abuts against the edge of the reducing joint, and the head of the second connecting bolt abuts against the edge of the hanger.
8. A cold and hot production alternating wellhead assembly according to any one of claims 5 to 7, wherein the first seal comprises a graphite seal;
the second seal comprises a graphite seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020818747.9U CN210977380U (en) | 2020-05-18 | 2020-05-18 | Cold and hot extraction alternative wellhead device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020818747.9U CN210977380U (en) | 2020-05-18 | 2020-05-18 | Cold and hot extraction alternative wellhead device |
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| Publication Number | Publication Date |
|---|---|
| CN210977380U true CN210977380U (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020818747.9U Active CN210977380U (en) | 2020-05-18 | 2020-05-18 | Cold and hot extraction alternative wellhead device |
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| CN (1) | CN210977380U (en) |
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