CN210049859U

CN210049859U - Well head device that leakproofness is good

Info

Publication number: CN210049859U
Application number: CN201920708330.4U
Authority: CN
Inventors: 孙乾; 孙颖; 黄广明; 董栋栋; 白明明; 孙祥宽; 庞云雷; 林祥
Original assignee: Shandong Rongteng Petroleum Equipment Co Ltd
Current assignee: Shandong Rongteng Petroleum Equipment Co Ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-02-11
Anticipated expiration: 2029-05-17

Abstract

The utility model belongs to the technical field of the oil development technique and specifically relates to a well head device that leakproofness is good. The utility model discloses a well head device that leakproofness is good, through the cooperation of annular groove and annular lug, the cooperation of first internal thread and first external screw thread, the cooperation of second external screw thread and third external screw thread between fixing base and the external screw thread pipe, realize tertiary seal, strengthen the leakproofness between it, the setting of sealing ring does benefit to further to strengthen the leakproofness between fixing base and the external screw thread pipe; when the inside needs of wellhead assembly seal, gas among the outside air inlet unit passes through the suction nozzle and gets into gas passage to through gas passage in getting into the gasbag along the cavity dead lever, the gasbag is sufficient after aerifing, blocks up the pipe, realizes the inside sealed of wellhead assembly, can make wellhead assembly body use more convenient, the effectual unnecessary wasting of resources of having avoided.

Description

Well head device that leakproofness is good

Technical Field

The utility model belongs to the technical field of the oil development technique and specifically relates to a well head device that leakproofness is good.

Background

The oil extraction is a driving mode that oil gas flows into a well bottom from a reservoir stratum and rises to the well top from the well bottom in the process of oil extraction, and a well top device is made of a pipe head, a blowout preventer group and the like and is used for controlling the pressure and the direction of gas and liquid fluid.

The wellhead assembly is in the use, and oil takes place to leak easily, and current most wellhead assembly leak protection performance is relatively poor, and serious influence the efficiency of oil development, caused unnecessary wasting of resources, it is more inconvenient to use.

In the well head device that chinese patent CN207892575U granted and disclosed that a leakproofness is good, through setting up sealing plug and push rod in the inside of well head device body, under the combined action of external thread pipe and nut, twist external thread pipe and can promote the sealing plug and reciprocate in the inside of well head device body to can reach the closure to the well head device body. However, the sealing is achieved in a manner that, due to the sealing plug being inside the wellhead, there is inconvenience in adjusting its position by screwing, which prolongs the operating time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a well head device that leakproofness is good, it is poor to overcome well head device leak protection performance among the aforementioned prior art, influences the inconvenient not enough of well head device's that oil development efficiency and prior art's leakproofness are good sealing mechanism adjustment easily.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a well head device that leakproofness is good, includes the well head device body, sets up in the first ring flange of well head device body upper end outer wall, is fixed in cylindric fixing base of well head device body upper end, its characterized in that: the outer wall of the lower end of the fixing seat is provided with a second flange matched with the first flange, the wellhead device and the fixing seat are fixed in a sealing mode through the first flange and the second flange, an annular groove is formed in the position, close to the edge, of the top surface of the fixing seat, one side, close to the inner cylinder, of the top surface of the fixing seat is provided with an annular side opening groove, the side wall of the annular side opening groove is provided with a first internal thread, and the side wall of the inner cylinder of the fixing seat; the upper end of the fixed seat is screwed with the external thread pipe, the external thread pipe comprises a first pipe section, a second pipe section and a third pipe section, the inner diameter and the outer diameter of the first pipe section are both larger than those of the third pipe section, the second pipe section is in a transitional conical structure, an annular convex block matched with the annular groove is arranged at the lower end of the first pipe section close to the edge, a first annular flange matched with the annular side open slot and a second annular flange extending into the inner cylinder of the fixed seat are arranged at one side of the lower end of the first pipe section close to the inside of the pipe, a first external thread is arranged on the side wall of the first annular flange, a second external thread is arranged on the outer side wall of the second annular flange, and three-stage sealing is realized and the sealing performance between the fixed seat and the external thread pipe is enhanced through the matching of the annular groove and the annular bump, the matching of the first internal thread and the first external thread and the matching of the second external thread and the third external thread; and the first pipe section is provided with an inflatable plugging mechanism for sealing the inside of the wellhead device.

Furthermore, two symmetrical guide pipes are fixedly communicated with the inner side wall of the wellhead device body.

Further, inflatable shutoff mechanism is including the symmetry set up in the inboard cavity dead lever of second annular flange lower extreme, set up in the gasbag of cavity dead lever lower extreme, set up in first pipeline section inboard and with the gas passage of cavity dead lever intercommunication and set up on first pipeline section upper end outer wall and with the suction nozzle of gas passage intercommunication, when the wellhead assembly is inside to be sealed, gas among the outside air inlet unit passes through the suction nozzle and gets into gas passage to in gas passage gets into the gasbag along the cavity dead lever, the gasbag is sufficient after aerifing, the jam pipe, realize the inside sealed of wellhead assembly.

Furthermore, the diameter of the airbag in the non-inflated state is smaller than or equal to the outer diameter of the second annular flange, so that friction damage to the outer wall of the airbag is avoided in the installation process of the external threaded pipe, the horizontal position of the airbag corresponds to the position of the guide pipe, the guide pipe is convenient to block in the inflated state of the airbag, and the sealing inside the wellhead device is further realized.

Further, the bracing piece that second ring flange upper end set up through the symmetry is fixed with the sealing ring, the lower part welds on the outer wall of fixing base upper end in the inner wall of sealing ring, and upper portion is provided with the third internal thread in the inner wall of sealing ring, and being provided with of sealing ring does benefit to the leakproofness between further reinforcing fixing base and the external screw pipe.

Furthermore, a third external thread is arranged at the middle lower part of the first pipe section of the external thread pipe and is used for being matched and screwed with the third internal thread on the sealing ring.

Furthermore, a fourth external thread for connecting with an external pipeline is arranged on the outer wall of the third pipe section of the external thread pipe

The utility model has the advantages that: compared with the prior art, the wellhead device with good sealing performance of the utility model realizes three-level sealing and strengthens the sealing performance between the fixing seat and the external thread pipe through the matching of the annular groove and the annular bump, the matching of the first internal thread and the first external thread and the matching of the second external thread and the third external thread, and the arrangement of the sealing ring is beneficial to further strengthening the sealing performance between the fixing seat and the external thread pipe; when the inside needs of wellhead assembly seal, gas among the outside air inlet unit passes through the suction nozzle and gets into gas passage to through gas passage in getting into the gasbag along the cavity dead lever, the gasbag is sufficient after aerifing, blocks up the pipe, realizes the inside sealed of wellhead assembly, can make wellhead assembly body use more convenient, the effectual unnecessary wasting of resources of having avoided.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the fixing base of the present invention;

fig. 3 is a schematic view of the structure of the external thread pipe of the present invention;

the wellhead device comprises a wellhead device body 1, a first flange plate 2, a fixed seat 3, a second flange plate 4, an annular groove 5, an annular side opening groove 6, an external threaded pipe 7, a first pipe section 8, a second pipe section 9, a third pipe section 10, an annular bump 11, a first annular flange 12, a second annular flange 13, a guide pipe 14, a hollow fixing rod 15, an air bag 16, a gas channel 17, an air inlet nozzle 18, a supporting rod 19 and a sealing ring 20.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.

In the embodiment shown in fig. 1-3, a wellhead device with good sealing performance comprises a wellhead device body 1, a first flange 2 arranged on the outer wall of the upper end of the wellhead device body 1, and a cylindrical fixing seat 3 fixed on the upper end of the wellhead device body 1, wherein a second flange 4 matched with the first flange 2 is arranged on the outer wall of the lower end of the fixing seat 3, an annular groove 5 is arranged on the top surface of the fixing seat 3 close to the edge, an annular side opening groove 6 is arranged on one side of the top surface of the fixing seat 3 close to an inner cylinder of the fixing seat, a first internal thread is arranged on the side wall of the annular side opening groove 6, and a second internal thread; the upper end of the fixed seat 3 is screwed with an external threaded pipe 7, the external threaded pipe 7 comprises a first pipe section 8, a second pipe section 9 and a third pipe section 10, the inner diameter and the outer diameter of the first pipe section 8 are larger than those of the third pipe section 10, the second pipe section 9 is in a transitional conical structure, an annular bump 11 matched with the annular groove 5 is arranged at the position, close to the edge, of the lower end of the first pipe section 8, a first annular flange 12 matched with the annular side open slot 6 and a second annular flange 13 extending into the inner cylinder of the fixed seat 3 are arranged at one side, close to the inner side of the pipe, of the lower end of the first pipe section 8, a first external thread is arranged on the side wall of the first annular flange 12, a second external thread is arranged on the outer side wall of the second annular flange 13, and a fourth external thread used for being connected with an external pipeline is; two symmetrical guide pipes 14 are fixedly communicated with the inner side wall of the wellhead device body 1; and an inflatable plugging mechanism is arranged on the first pipe section 8.

In this embodiment, the inflatable plugging mechanism includes a hollow fixing rod 15 symmetrically disposed at the inner side of the lower end of the second annular flange 13, an air bag 16 disposed at the lower end of the hollow fixing rod 15, a gas passage 17 disposed at the inner side of the first pipe segment 8 and communicated with the hollow fixing rod 15, and a gas inlet nozzle 18 disposed at the outer wall of the upper end of the first pipe segment 8 and communicated with the gas passage 17. The diameter of the balloon 16 in the uninflated state is smaller than or equal to the outer diameter of the second annular flange 13, the horizontal position of the balloon 16 corresponding to the position of the catheter 14.

In this embodiment, the upper end of the second flange plate 4 is fixed with a sealing ring 20 through a support rod 19 which is symmetrically arranged, the middle lower part of the inner wall of the sealing ring 20 is welded on the outer wall of the upper end of the fixing seat 3, and the middle upper part of the inner wall of the sealing ring 20 is provided with a third internal thread. And a third external thread is arranged at the middle lower part of the first pipe section 8 of the external thread pipe 7.

The working principle is as follows: the utility model discloses a well head device that leakproofness is good, through the cooperation of annular groove 5 and annular lug 11, the cooperation of first internal thread and first external screw thread, the cooperation of second external screw thread and third external screw thread between fixing base 3 and the external screw thread pipe 7, realize tertiary seal, strengthen the leakproofness between it, the setting of sealing ring 20 is favorable to further strengthening the leakproofness between fixing base 3 and the external screw thread pipe 7; when the inside needs of wellhead assembly body 1 seal up, gas in the outside air inlet unit passes through air inlet nozzle 18 and gets into gas passage 17 to through gas passage 17 along cavity dead lever 15 entering gasbag 16, gasbag 16 is inflated the back and is full, blocks up pipe 14, realizes the inside sealed of wellhead assembly body 1, can make wellhead assembly body use more convenient, the effectual unnecessary wasting of resources of having avoided.

The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the forms and styles of the above embodiments, and any suitable changes or modifications made thereto by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a well head device that leakproofness is good, includes the well head device body, sets up in the first ring flange of well head device body upper end outer wall, is fixed in cylindric fixing base of well head device body upper end, its characterized in that: the outer wall of the lower end of the fixed seat is provided with a second flange matched with the first flange, an annular groove is formed in the top surface of the fixed seat close to the edge, an annular side opening groove is formed in one side, close to the inner cylinder, of the top surface of the fixed seat, a first internal thread is arranged on the side wall of the annular side opening groove, and a second internal thread is arranged on the side wall of the inner cylinder of the fixed seat; the upper end of the fixing seat is screwed with the external threaded pipe, the external threaded pipe comprises a first pipe section, a second pipe section and a third pipe section, the inner diameter and the outer diameter of the first pipe section are larger than those of the third pipe section, the second pipe section is in a transitional conical structure, an annular bump matched with the annular groove is arranged at the position, close to the edge, of the lower end of the first pipe section, a first annular flange matched with the annular side opening groove and a second annular flange extending into the inner cylinder of the fixing seat are arranged at one side, close to the inner side, of the lower end of the first pipe section, a first external thread is arranged on the side wall of the first annular flange, and a second external thread is arranged on; an inflatable plugging mechanism is arranged on the first pipe section.

2. A well head assembly having improved sealing properties as claimed in claim 1, wherein: two symmetrical guide pipes are fixedly communicated with the inner side wall of the wellhead device body.

3. A well head assembly having improved sealing properties as claimed in claim 2, wherein: the inflatable plugging mechanism comprises a hollow fixing rod, an air bag, a gas passage and a gas inlet nozzle, wherein the hollow fixing rod is symmetrically arranged on the inner side of the lower end of the second annular flange, the air bag is arranged at the lower end of the hollow fixing rod, the gas passage is arranged on the inner side of the first pipe section and is communicated with the hollow fixing rod, and the gas inlet nozzle is arranged on the outer wall of the upper end of the first pipe section.

4. A well head assembly having improved sealing as claimed in claim 3, wherein: the diameter of the balloon in an uninflated state is smaller than or equal to the outer diameter of the second annular flange, and the horizontal position of the balloon corresponds to the position of the catheter.

5. A well head assembly having improved sealing properties as claimed in claim 1, wherein: the bracing piece that second ring flange upper end set up through the symmetry is fixed with the sealing ring, weld on the outer wall of fixing base upper end lower part in the inner wall of sealing ring, upper portion is provided with the third internal thread in the inner wall of sealing ring.

6. A well head assembly having improved sealing properties as claimed in claim 5, wherein: and a third external thread is arranged at the middle lower part of the first pipe section of the external thread pipe.

7. A well head assembly having improved sealing properties as claimed in claim 1, wherein: and a fourth external thread used for being connected with an external pipeline is arranged on the outer wall of the third pipe section of the external thread pipe.