CN212428689U - Speed tubular column sealing and hanging device with auxiliary sealing function - Google Patents
Speed tubular column sealing and hanging device with auxiliary sealing function Download PDFInfo
- Publication number
- CN212428689U CN212428689U CN202020507388.5U CN202020507388U CN212428689U CN 212428689 U CN212428689 U CN 212428689U CN 202020507388 U CN202020507388 U CN 202020507388U CN 212428689 U CN212428689 U CN 212428689U
- Authority
- CN
- China
- Prior art keywords
- sealing
- suspension
- sleeve
- seal
- device body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 108
- 239000000725 suspension Substances 0.000 claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 238000002955 isolation Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 23
- 238000004519 manufacturing process Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002343 natural gas well Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Images
Landscapes
- Pipe Accessories (AREA)
Abstract
The utility model provides a speed tubular column sealing suspension device with auxiliary seal, which comprises a centering sleeve, a suspension sealing device body, a conversion flange, a suspension slip, a conical sleeve and a sealing rubber cylinder, wherein the upper end of the suspension sealing device body is connected with the conversion flange; the righting sleeve is provided with at least two sealing rings; the suspension slips, the conical sleeve and the sealing rubber sleeve are sequentially arranged in an annular space between the speed pipe column and the suspension sealing device body from top to bottom; the upper part of the suspension sealing device body is provided with a jackscrew. The utility model discloses righting the cover and being equipped with the multichannel sealing washer, realizing righting the supplementary seal between cover, speed tubular column, the conversion flange three, and can form an isolation chamber between main seal and supplementary seal, the protection hangs the slips and does not corrode.
Description
Technical Field
The utility model relates to a gas field exploitation technical field, in particular to sealed linkage of speed tubular column with supplementary seal.
Background
Along with the continuous production time of the gas well, the productivity of the gas well is gradually reduced, liquid begins to accumulate at the bottom of the gas well when the production rate is lower than the critical liquid carrying flow rate, and if liquid discharging measures are not taken in time, the gas well can be flooded with water and even stops producing. The speed pipe column water drainage gas production technology is based on a shaft two-phase flow and minimum liquid carrying flow theory, a coiled tubing with a small diameter is put into an original phi 73mm oil pipe of a gas well to serve as a production pipe column, the coiled tubing is cut off and then hung on a gas production well head through a special hanger, the technology can reduce the critical liquid carrying flow rate of the gas well and increase the gas flow rate in the shaft, so that the liquid carrying capacity of the gas well is improved, the gas well is ensured not to accumulate liquid for a long time, and the stable production of the gas well is ensured.
How to make the coiled tubing hang on the gas production wellhead with good sealing for a long time is one of the keys of success and failure of the drainage and gas production process of the speed pipe column. At present, only one seal is arranged between the used suspension device and the speed pipe column, and corrosive fluid produced by a gas well is easy to corrode due to direct contact with slips of a hanger, so that the safety risk of sealing and suspending at a gas production wellhead for a long time is higher.
SUMMERY OF THE UTILITY MODEL
In order to overcome the current higher problem of safe risk of hanging in the gas production well head seal for a long time, the utility model provides a sealed linkage of speed tubular column with supplementary seal, the utility model discloses combine together main seal and supplementary seal to realize the double seal between hanger and the speed tubular column, ensure that the speed tubular column is sealed and hang in the long-term stability of natural gas well head.
The utility model adopts the technical proposal that:
a speed tubular column sealing suspension device with auxiliary sealing comprises a centering sleeve, a suspension sealing device body, a conversion flange, a suspension slip, a conical sleeve and a sealing rubber cylinder, wherein the upper end of the suspension sealing device body is connected with the conversion flange; the righting sleeve is provided with at least two sealing rings; the suspension slips, the conical sleeve and the sealing rubber sleeve are sequentially arranged in an annular space between the speed pipe column and the suspension sealing device body from top to bottom; the upper part of the suspension sealing device body is provided with a jackscrew, and the jackscrew penetrates through the suspension sealing device body to be in contact connection with the conical sleeve.
The sealing ring is an O-shaped sealing ring.
The sealing ring comprises an outer sealing ring and an inner sealing ring.
The outer sealing rings are arranged between the centering sleeve and the conversion flange, and the inner sealing rings are arranged between the centering sleeve and the speed pipe column.
The hanging sealing device body is connected with the conversion flange through bolts.
The upper end port of the centralizing sleeve is in a horn mouth shape.
The lower end of the sealing rubber cylinder is provided with a gasket.
The side surface of the suspension sealing device body is provided with a bypass channel.
The utility model has the advantages that:
the conversion flange of the utility model has the reducing function, is convenient for butt joint with KQ65-70 type valves on gas production trees, and has the auxiliary sealing function.
The utility model provides an outer seal ring in the sealing washer reaches fine supplementary sealed effect.
The utility model discloses well hanger side is opened there is the bypass passageway, and when going into the speed tubular column down, can adopt the annular space production between original oil pipe and the speed tubular column, need not to close the well, and the pit shaft internal pressure that has avoided closing the well and lead to risees, and the condition of low tube resistance increase takes place.
The following will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the present apparatus.
Fig. 2 is a schematic view of the auxiliary sealing structure.
In the figures, the reference numbers are: 1. a centralizing sleeve; 2. a seal ring; 2-1, an outer sealing ring; 2-2, an inner sealing ring; 3. converting the flange; 4. fastening a bolt; 5. hanging slips; 6. a conical sleeve; 7. carrying out top thread; 8. sealing the rubber cylinder; 9. a gasket; 10. a velocity string; 11. and hanging the sealing device body.
Detailed Description
Example 1:
in order to overcome the current higher problem of safe risk of hanging in the sealed of gas production well head for a long time, the utility model provides a sealed linkage of speed tubular column with supplementary seal as shown in fig. 1-2, the utility model discloses combine together main seal and supplementary seal to realize the double seal between hanger and the speed tubular column, ensure that the long-term stable of speed tubular column at the natural gas well head is sealed and hangs.
A velocity string sealing suspension device with auxiliary sealing comprises a centering sleeve 1, a suspension sealing device body 11, a conversion flange 3, a suspension slip 5, a conical sleeve 6 and a sealing rubber sleeve 8, wherein the upper end of the suspension sealing device body 11 is connected with the conversion flange 3, a velocity string 10 is arranged in the suspension sealing device body 11, and the centering sleeve 1 is arranged on the outer side of the upper end of the velocity string 10 and is positioned in the conversion flange 3; the righting sleeve 1 is provided with at least two sealing rings 2; the suspension slips 5, the conical sleeve 6 and the sealing rubber cylinder 8 are sequentially arranged in an annular space between the velocity string 10 and the suspension sealing device body 11 from top to bottom; the top of the hanging sealing device body 11 is provided with a jackscrew 7, and the jackscrew 7 penetrates through the hanging sealing device body 11 to be in contact connection with the conical sleeve 6.
The utility model discloses a jackscrew 7 of screwing comes compression seal packing element 8 to realize the main seal, set 1 is right in the design of speed tubular column 10 upper end mouth, in order to keep speed tubular column 10 in the middle of, the later stage area of being convenient for is pressed the pipe tool and is passed through, it is sealed to right set 1 to be equipped with multichannel sealing washer 2, progressively realize right set 1, speed tubular column 10, the supplementary seal between 3 three of change-over flange, and can form an isolation chamber between main seal and supplementary seal, avoid hanging slips and hydrogen sulfide, acid gas contact such as carbon dioxide, the protection hangs slips 5 and does not corrode.
Example 2:
based on embodiment 1, in this embodiment, the sealing ring 2 is an O-ring.
Preferably, the sealing ring 2 comprises an outer sealing ring 2-1 and an inner sealing ring 2-2.
Preferably, the outer sealing rings 2-1 are multiple and are arranged between the centering sleeve 1 and the conversion flange 3, and the inner sealing rings 2-2 are multiple and are arranged between the centering sleeve 1 and the velocity string 10.
Preferably, the hanging sealing device body 11 and the conversion flange 3 are connected through bolts 4.
Preferably, the upper port of the centralizing sleeve 1 is in a bell mouth shape.
The utility model discloses well 1 upper port of centering sleeve adopts the horn mouth design, and the blanking plug that squeezes into when the later stage speed tubular column 10 play the pipe operation of being convenient for gets into the inside of speed tubular column 10 smoothly. Then, aligning and inserting the central hole of the conversion flange 3 with the upper end opening of the speed pipe column 10, uniformly screwing four fastening bolts 4 from four different directions, installing the conversion flange 3 above the hanger 11, and finishing the auxiliary sealing among the centering sleeve 1, the speed pipe column 10 and the conversion flange 3.
Preferably, the lower end of the sealing rubber cylinder 8 is provided with a gasket 9.
Preferably, a bypass channel is formed on the side surface of the suspension sealing device body 11.
A sealing method of a speed tubular column sealing suspension device with auxiliary sealing comprises the following specific steps:
step one, main seal of speed pipe column
During field operation, the jackscrew 7 is rotated to push the conical sleeve 6 to move downwards, force is transmitted to the sealing rubber sleeve 8 through the conical sleeve 6, the outer part of the velocity string 10 can be sealed after the sealing rubber sleeve 8 is compressed, deformed and expanded, the suspension slip 5 is put into the velocity string 10, then the velocity string 10 is cut off by using a blowout preventer, all components above the hanger are removed, and the suspension and main sealing operation of the velocity string 10 is completed;
step two, auxiliary sealing of speed pipe column
A plurality of sealing rings 2 are arranged on a centering sleeve 1, then the centering sleeve 1 is inserted into the upper end port of a velocity pipe column 10, wherein an outer sealing ring 2-1 is arranged between the centering sleeve 1 and a conversion flange 3, and an inner sealing ring 2-2 is arranged between the centering sleeve 1 and the velocity pipe column 10, so that auxiliary sealing among the centering sleeve 1, the velocity pipe column 10 and the conversion flange 3 is respectively completed.
The utility model provides a pair of sealed linkage's of speed tubular column sealing method with supplementary seal mainly accomplishes through two steps: 1. suspension and primary sealing; 2. and (5) auxiliary sealing.
1. Speed pipe column suspension and main seal
During field operation, firstly, a hanger is installed on a main control valve at a well head, then an operation window, a blowout preventer and an injection head device are sequentially installed, a coiled tubing operation vehicle is used for lowering a speed pipe column to a specified depth, a jackscrew 7 is rotated, a conical sleeve 6 is pushed to move downwards, force is transmitted to a sealing rubber sleeve 8 through the conical sleeve 6, when the rubber sleeve is compressed, deformed and expanded, the outer part of the speed pipe column 10 can be sealed, whether sealing is good or not is checked by a pressure gauge on the upper part of the operation window, if no display is displayed for at least 20 minutes by a pointer of the pressure gauge, sealing is good, the operation window is opened, a hanging slip 5 is thrown in, the speed pipe column 10 is hung, then the blowout preventer is used for cutting off the speed pipe column 10, all parts above the hanger are removed, and hanging and.
2. Velocity string auxiliary seal
An O-shaped sealing ring is arranged on a centering sleeve 1, then the centering sleeve 1 is inserted into the upper port of a speed pipe column 10, wherein an O-shaped outer sealing ring 2-1 is arranged outside the centering sleeve 1 and is used for sealing the gap between the centering sleeve 1 and a conversion flange 3, an O-shaped inner sealing ring 2-2 is arranged inside the centering sleeve 1 and is used for sealing the gap between the centering sleeve 1 and the speed pipe column 10, and therefore auxiliary sealing among the centering sleeve 1, the speed pipe column 10 and the conversion flange 3 is completed in part.
The utility model discloses set 1 is right in design of 10 up ends of speed tubular column, in order to keep speed tubular column 10 in the middle of, the later stage area of being convenient for press the driving tool to pass through, right set 1 and be equipped with the multichannel sealing washer 2, progressively realize right set 1, speed tubular column 10, the supplementary seal between the 3 three of conversion flange, and can form a isolation chamber between main seal and supplementary seal, avoid hanging slips 5 and hydrogen sulfide, acid gas contact such as carbon dioxide, the protection hangs the slips and does not corrode.
The conversion flange 3 has the function of reducing, is convenient to be butted with a KQ65-70 type valve on a gas production tree, and has the function of auxiliary sealing. The side surface of the hanger is provided with a bypass channel, when the speed pipe column is put into the hanger, the annular production between the original oil pipe and the speed pipe column can be adopted, the well does not need to be shut down, the conditions that the pressure in the shaft is increased and the pipe laying resistance is increased due to the shut-down of the well are avoided.
Finally, it should be noted that the above examples are only intended to illustrate the technical implementation of the method and not to limit, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be covered by the scope of the claims of the present invention. The device parts and methods not described in detail in the present invention are prior art and no further explanation will be given in the present invention.
Claims (8)
1. The utility model provides a sealed linkage of speed tubular column with supplementary seal which characterized in that: the device comprises a centering sleeve (1), a hanging sealing device body (11), a conversion flange (3), a hanging slip (5), a conical sleeve (6) and a sealing rubber sleeve (8), wherein the upper end of the hanging sealing device body (11) is connected with the conversion flange (3), a speed pipe column (10) is arranged in the hanging sealing device body (11), and the centering sleeve (1) is arranged on the outer side of the upper end of the speed pipe column (10) and is positioned in the conversion flange (3); the righting sleeve (1) is provided with at least two sealing rings (2); the suspension slips (5), the conical sleeve (6) and the sealing rubber sleeve (8) are sequentially arranged in an annular space between the speed pipe column (10) and the suspension sealing device body (11) from top to bottom; the top of the hanging sealing device body (11) is provided with a jackscrew (7), and the jackscrew (7) penetrates through the hanging sealing device body (11) to be in contact connection with the conical sleeve (6).
2. A velocity string seal suspension with secondary seal as claimed in claim 1 wherein: the sealing ring (2) is an O-shaped sealing ring.
3. A velocity string seal suspension with secondary seal as claimed in claim 1 wherein: the sealing ring (2) comprises an outer sealing ring (2-1) and an inner sealing ring (2-2).
4. A velocity string seal suspension with secondary seal as claimed in claim 3 wherein: the outer sealing rings (2-1) are multiple and are arranged between the centering sleeve (1) and the conversion flange (3), and the inner sealing rings (2-2) are multiple and are arranged between the centering sleeve (1) and the speed pipe column (10).
5. A velocity string seal suspension with secondary seal as claimed in claim 1 wherein: the suspension sealing device body (11) is connected with the conversion flange (3) through bolts (4).
6. A velocity string seal suspension with secondary seal as claimed in claim 1 wherein: the upper port of the centralizing sleeve (1) is in a horn mouth shape.
7. A velocity string seal suspension with secondary seal as claimed in claim 1 wherein: the lower end of the sealing rubber cylinder (8) is provided with a gasket (9).
8. A velocity string seal suspension with secondary seal as claimed in claim 1 wherein: the side surface of the suspension sealing device body (11) is provided with a bypass channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020507388.5U CN212428689U (en) | 2020-04-09 | 2020-04-09 | Speed tubular column sealing and hanging device with auxiliary sealing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020507388.5U CN212428689U (en) | 2020-04-09 | 2020-04-09 | Speed tubular column sealing and hanging device with auxiliary sealing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212428689U true CN212428689U (en) | 2021-01-29 |
Family
ID=74295703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020507388.5U Active CN212428689U (en) | 2020-04-09 | 2020-04-09 | Speed tubular column sealing and hanging device with auxiliary sealing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212428689U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364936A (en) * | 2020-04-09 | 2020-07-03 | 中国石油天然气股份有限公司 | Speed tubular column sealing suspension device with auxiliary sealing and sealing method |
-
2020
- 2020-04-09 CN CN202020507388.5U patent/CN212428689U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364936A (en) * | 2020-04-09 | 2020-07-03 | 中国石油天然气股份有限公司 | Speed tubular column sealing suspension device with auxiliary sealing and sealing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111364936A (en) | Speed tubular column sealing suspension device with auxiliary sealing and sealing method | |
| CN101644149B (en) | Integral type level oil extraction wellhead equipment | |
| CN104989314B (en) | Mud line production tree and its installation method under water | |
| CN207080207U (en) | Oil field separates adopts technology tubular column | |
| CN212428689U (en) | Speed tubular column sealing and hanging device with auxiliary sealing function | |
| CN111878069A (en) | Composite continuous pipe cable oil-water well casing leakage finding system and method | |
| CN111827897A (en) | Oil pipe lowering device suitable for high-pressure gas well | |
| CN204984329U (en) | Built -in coiled tubing hanger | |
| CN201567998U (en) | Drainage gas production well head sealing suspension device | |
| CN201486503U (en) | Integrated type horizontal oil extraction wellhead device | |
| CN210919028U (en) | Pressure testing device of blowout preventer full-sealing flashboard | |
| CN107829710A (en) | A kind of ring-type valve plate type downhole safety device | |
| CN113494259A (en) | Coiled tubing suspension device, coiled tubing wellhead mandrel type suspension structure and method | |
| CN202596695U (en) | Downhole gas-injection tubular column | |
| CN214196252U (en) | Novel throw and drag for electric submersible pump well head christmas tree device | |
| CN204691729U (en) | Mud line production tree under water | |
| CN211851754U (en) | Leakage-proof casing head of oil extraction well head | |
| CN209483229U (en) | Completion string and production system | |
| CN204511334U (en) | With the oil pipe of hydraulic control lines | |
| CN211666677U (en) | Injection-production type integrated wellhead | |
| CN106194099A (en) | Gas control downhole packer | |
| CN201778733U (en) | Hydraulic penetration device between subsea production tree and tubing hanger | |
| CN206625815U (en) | A kind of anti-leak thermal extraction casing head | |
| CN111520099A (en) | Split type large-traffic casing head of oil gas well | |
| CN205778688U (en) | Fire-burning huff-puff/fireflood well casing head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |