CN215292421U - Coal bed gas casing head - Google Patents
Coal bed gas casing head Download PDFInfo
- Publication number
- CN215292421U CN215292421U CN202121542063.1U CN202121542063U CN215292421U CN 215292421 U CN215292421 U CN 215292421U CN 202121542063 U CN202121542063 U CN 202121542063U CN 215292421 U CN215292421 U CN 215292421U
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- casing head
- head body
- taper sleeve
- gland
- taper
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Abstract
The utility model relates to a gas production equipment field, concretely relates to coal bed gas casing head. Including the casing head body, the taper hole has been seted up in casing head body upper end, be fixed with two branch pipes rather than inside intercommunication on the casing head body of taper hole below, sealing connection has the taper sleeve in the taper hole, the taper sleeve internal fixation has the fender ring, the taper sleeve upper end protrusion is to casing head body top, casing head body upper end threaded connection has rather than endocentric gland, the taper sleeve upper end has been seted up rather than endocentric annular, it is provided with the bulge loop to slide in the annular, bulge loop and gland fixed connection, taper sleeve upper end and gland sealing connection, taper sleeve upper end outer fringe is fixed with a plurality of dogs, casing head body upper end is fixed with the slot that corresponds with the dog, the dog is pegged graft in the slot. The utility model discloses, through the cooperation of dog and slot and the cooperation of bulge loop and annular, the taper sleeve installation back can increase its stability, and the gland can be carried out comprehensive stability to the taper sleeve, and sealing performance is good.
Description
Technical Field
The utility model relates to a gas production equipment field, concretely relates to coal bed gas casing head.
Background
The coal bed gas is hydrocarbon gas which is stored in a coal bed, takes methane as a main component, is adsorbed on the surface of coal matrix particles as a main component, is partially dissociated in coal pores or dissolved in coal bed water, is an associated mineral resource of coal, belongs to unconventional natural gas, and is a clean and high-quality new energy which is grown internationally in nearly twenty years. The coal bed gas is mainly mined by ground well drilling, the coal bed gas well is drilled by adopting a double-opening well body structure, two layers of sleeves are put into the well, wherein the sleeves on the surface layer are fixed by a method of cementing and sealing outside the pipe, and the well mouth is hung by an annular steel plate to produce the sleeves.
At present, a wellhead device of a coal bed gas well uses a connecting sleeve to hang a production casing, and a jackscrew or a bolt is generally utilized to stabilize the connecting sleeve, so that the connecting sleeve is poor in stability and poor in sealing performance, after the connecting sleeve is stabilized, the situation of dislocation easily occurs to the connecting sleeve, the jackscrew can be damaged in serious conditions, and a casing head is scrapped.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a stability can be good, simple structure, convenient to use, coal bed gas casing head that sealing performance is good.
In order to realize the purpose, the utility model provides a technical scheme is:
the utility model provides a coal bed gas casing head, including the casing head body, the taper hole has been seted up in casing head body upper end, be fixed with two branch pipes rather than inside intercommunication on the casing head body of taper hole below, sealing connection has the taper sleeve in the taper hole, the taper sleeve internal fixation has the fender ring, the taper sleeve upper end protrusion is rather than endocentric gland, casing head body upper end threaded connection has rather than endocentric gland, the taper sleeve upper end has been seted up rather than endocentric annular, it is provided with the bulge loop to slide in the annular, bulge loop and gland fixed connection, taper sleeve upper end and gland sealing connection, taper sleeve upper end outer fringe is fixed with a plurality of dogs, casing head body upper end is fixed with the slot that corresponds with the dog, the dog is pegged graft in the slot.
Specifically, a plurality of lower seal grooves are formed in the conical surface of the conical hole, a lower seal ring is installed in each lower seal groove, and the conical sleeve is connected with the casing head body in a sealing mode through the lower seal ring.
Specifically, a plurality of upper seal grooves concentric with the upper end of the taper sleeve are formed in the upper end of the taper sleeve, an upper seal ring is installed in each upper seal groove, and the gland is connected with the upper end of the taper sleeve in a sealing mode through the upper seal ring.
Specifically, the two branch pipes communicated with the interior of the casing head are arranged in bilateral symmetry according to the axis of the casing head body.
Specifically, a plurality of vertical screw holes are evenly distributed on the circumference of the upper end of the gland.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses, simple structure, simple to operate, cooperation and bulge loop and the cooperation of annular through dog and slot, the taper sleeve installation back can increase its stability, and the gland can be carried out comprehensive stability to the taper sleeve, and sealing performance is good.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in figure 1, a coal bed gas casing head comprises a casing head body 1, wherein a taper hole is formed in the upper end of the casing head body 1, two branch pipes 2 communicated with the interior of the casing head body 1 are fixed on the casing head body 1 below the taper hole, the two branch pipes 2 are symmetrically arranged in the left and right directions according to the axis of the casing head body 1, a taper sleeve 4 is hermetically connected in the taper hole, a plurality of lower sealing grooves are formed in the conical surface of the taper hole, a lower sealing ring 6 is installed in each lower sealing groove, the taper sleeve 4 is hermetically connected with the casing head body 1 through the lower sealing ring 6, a baffle ring 5 is fixed in the taper sleeve 4, the upper end of the taper sleeve 4 protrudes to the upper side of the casing head body 1, a gland 7 concentric with the casing head body is in threaded connection with the upper end of the casing head body 1, a plurality of vertical threaded holes 11 are uniformly distributed on the circumference of the upper end of the gland 7, a circular groove 9 concentric with the upper end of the taper sleeve 4 is formed in the upper end of the cone sleeve 4, a convex ring 8 is arranged in the circular groove 9 in a sliding manner, the convex ring 8 is fixedly connected with the gland 7, the upper end of the taper sleeve 4 is connected with the gland 7 in a sealing manner, a plurality of upper sealing grooves concentric with the upper end of the taper sleeve 4 are formed in the upper end of the taper sleeve, the upper sealing ring 10 is installed in the upper sealing groove, the gland 7 is connected with the upper end of the taper sleeve 4 in a sealing manner through the upper sealing ring 10, a plurality of stop blocks 13 are fixed on the outer edge of the upper end of the taper sleeve 4, a slot 12 corresponding to the stop blocks 13 is fixed at the upper end of the casing head body 1, and the stop blocks 13 are inserted into the slot 12.
When the utility model is installed, the lower end of the casing head body 1 is connected with the upper end of the surface casing 14 in a thread sealing way, before the last production casing 3 is placed, the taper sleeve 4 can be connected with the production casing 3 in a thread sealing way in advance, the upper end of the production casing 3 tightly supports the baffle ring 5, then the production casing 3 connected with the taper sleeve 4 is placed in, the taper sleeve 4 is inserted into the taper hole at the upper end of the casing head body 1, the stop block 13 is inserted into the slot 12, the taper sleeve 4 can be prevented from rotating under the matching action of the stop block 13 and the slot 12, the sealing performance of the taper sleeve 4 and the production casing 3 is ensured, then the gland 7 is connected with the upper end of the casing head body 1 in a thread way, the convex ring 8 is inserted into the ring groove 9, the gland 7 is rotated, the gland 7 tightly supports the taper sleeve 4, and the taper sleeve 4 is fixedly sealed in the taper hole at the upper end of the casing head body 1, the gland 7 can comprehensively extrude and stabilize the taper sleeve 4, the stability of taper sleeve 4 can be better, and taper sleeve 4 can not rotate when gland 7 rotates down simultaneously, can guarantee the sealing performance between taper sleeve 4 and production sleeve 3. The branch pipe 2 can be provided with various fittings such as a plug, a flat valve, a pressure gauge and the like, so that the functions of sealing an annular space between the surface casing 14 and the production casing 3, testing the pressure of the annular space between the surface casing 14 and the production casing 3, exhausting gas in the annular space, squeezing and injecting cement through external circulation and the like are realized.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a coal bed gas casing head, including the casing head body, a serial communication port, the taper hole has been seted up in the casing head body upper end, be fixed with two branch pipes rather than inside intercommunication on the casing head body of taper hole below, sealing connection has the taper sleeve in the taper hole, the taper sleeve internal fixation has the fender ring, the taper sleeve upper end protrusion is to casing head body top, casing head body upper end threaded connection has rather than endocentric gland, seted up rather than endocentric annular on the taper sleeve, it is provided with the bulge loop to slide in the annular, bulge loop and gland fixed connection, taper sleeve upper end and gland sealing connection, taper sleeve upper end outer fringe is fixed with a plurality of dogs, casing head body upper end is fixed with the slot that corresponds with the dog, the dog is pegged graft in the slot.
2. The coal bed gas casing head according to claim 1, wherein the conical surface of the conical hole is provided with a plurality of lower sealing grooves, lower sealing rings are installed in the lower sealing grooves, and the conical sleeve is connected with the casing head body in a sealing manner through the lower sealing rings.
3. The coal bed methane casing head according to claim 1, wherein the upper end of the conical sleeve is provided with a plurality of upper sealing grooves concentric with the conical sleeve, an upper sealing ring is arranged in each upper sealing groove, and the gland is connected with the upper end of the conical sleeve in a sealing manner through the upper sealing ring.
4. The coal bed methane casing head according to claim 1, wherein the two branch pipes communicated with the inside of the casing head are arranged in a left-right symmetrical manner according to the axis of the casing head body.
5. The coal bed methane casing head according to claim 1, wherein a plurality of vertical threaded holes are uniformly formed in the circumference of the upper end of the gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121542063.1U CN215292421U (en) | 2021-07-07 | 2021-07-07 | Coal bed gas casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121542063.1U CN215292421U (en) | 2021-07-07 | 2021-07-07 | Coal bed gas casing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215292421U true CN215292421U (en) | 2021-12-24 |
Family
ID=79521157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121542063.1U Active CN215292421U (en) | 2021-07-07 | 2021-07-07 | Coal bed gas casing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215292421U (en) |
-
2021
- 2021-07-07 CN CN202121542063.1U patent/CN215292421U/en active Active
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