CN211666685U - Soluble plugging tool for tail end of speed pipe column - Google Patents
Soluble plugging tool for tail end of speed pipe column Download PDFInfo
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- CN211666685U CN211666685U CN201922033010.6U CN201922033010U CN211666685U CN 211666685 U CN211666685 U CN 211666685U CN 201922033010 U CN201922033010 U CN 201922033010U CN 211666685 U CN211666685 U CN 211666685U
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Abstract
The utility model discloses a soluble shutoff instrument of speed tubular column tail end, including shutoff instrument nipple joint, shutoff instrument nipple joint inner wall connection has the inner connecting pipe, is connected with the plug seat on the inner wall of inner connecting pipe lower extreme, and plug seat lower extreme is connected with soluble end cap, and shutoff instrument nipple joint lower extreme is connected with the seeker, has still opened the sand control seam on the shutoff instrument nipple joint lateral wall. The production channel is opened by dissolving the soluble plug through the accumulated liquid at the bottom of the well, the problem that the plug is difficult to knock down after the coiled tubing is put into the well is solved, and compared with a nitrogen booster vehicle, the production channel has the advantage that the operation cost is reduced. When the fluid of the gas well is ensured not to be output from the coiled tubing in the construction process, the coiled tubing is made to enter the gas well, the water drainage and gas production functions of the speed pipe column are exerted in time, and the stable production of the gas well is guaranteed.
Description
Technical Field
The utility model relates to a gas field exploitation technical field, concretely relates to soluble shutoff instrument of speed tubular column tail end.
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 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 to be used as a speed pipe column water drainage gas production, 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. According to the technology, before coiled tubing is lowered into a shaft, a packer is preset at the bottom end of the coiled tubing on the ground, so that gas well fluid is prevented from being produced from the coiled tubing in the pipe lowering process.
At present, the technology is applied to more than 800 wells in the Changqing oil field with the largest petroleum, and hundreds of wells are applied every year, so that the technology becomes one of three main drainage and gas production technologies of the Changqing oil field. However, in the field application process of the technology, the blanking plug preset at the bottom of the speed pipe column is not easy to knock off sometimes, a nitrogen booster vehicle needs to be used for knocking off the blanking plug, more manpower and material resources are consumed, the operation cost is increased, sometimes the blanking plug cannot be knocked off even, and the speed pipe column water drainage and gas production of the gas well are seriously influenced.
Disclosure of Invention
The utility model aims at providing a soluble shutoff instrument of speed tubular column tail end has solved the problem that speed tubular column bottom blockked up and is difficult to beat among the prior art.
The technical scheme of the utility model is that: the utility model provides a soluble shutoff instrument of speed tubular column tail end, includes shutoff tool nipple joint, and shutoff tool nipple joint inner wall is connected with the inner union, is connected with the plug seat on the inner wall of inner union lower extreme, and the plug seat lower extreme is connected with soluble end cap, and shutoff tool nipple joint lower extreme is connected with the seeker, still opens the sand control seam on the shutoff tool nipple joint lateral wall.
Furthermore, a rolling groove is formed in the upper end of the plugging tool nipple, a first sealing groove is formed in the outer wall of the plugging tool nipple below the rolling groove, and a first sealing ring is connected in the first sealing groove.
Furthermore, a second sealing groove is formed in the joint of the inner connecting pipe and the plugging tool nipple, and a second sealing ring is connected in the second sealing groove.
Furthermore, a third sealing groove is formed at the joint of the plug seat and the inner connecting pipe, and a third sealing ring is connected in the third sealing groove.
Furthermore, a sleeve is sleeved outside the soluble plug.
Further, the guide head is connected with the plugging tool short section through a third pin.
Furthermore, the soluble plug is soluble aluminum.
Furthermore, the sand control seam is positioned on the side wall of the plugging tool nipple below the soluble plug.
The beneficial effects of the utility model reside in that, dissolve soluble end cap through shaft bottom hydrops and open the production passageway, solve the problem that continuous oil pipe goes into back blanking plug down and is difficult to beat, beat the blanking plug with nitrogen gas pressure-charged car and compare, reduce the operating cost. When the fluid of the gas well is ensured not to be output from the coiled tubing in the construction process, the coiled tubing is made to enter the gas well, the water drainage and gas production functions of the speed pipe column are exerted in time, and the stable production of the gas well is guaranteed.
Drawings
FIG. 1 is a schematic structural view of a soluble plug of a soluble plugging tool at the tail end of a velocity string when the soluble plug is not dissolved;
FIG. 2 is a schematic structural view of a soluble plug of a soluble plugging tool at the tail end of a velocity string after the soluble plug has dissolved;
in the figure: 1. the continuous oil pipe comprises a continuous oil pipe body, 2. a rolling groove, 3. a first sealing ring, 4. a plugging tool short section, 5. a second sealing ring, 6. an inner connecting pipe, 7. a first pin, 8. a plug seat, 9. a third sealing ring, 10. a second pin, 11. a screw thread, 12. a soluble plug, 13. a sleeve, 14. a sand prevention gap, 15. a third pin and 16. a guide head.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Detailed Description
[ example 1 ]
As shown in fig. 1 and 2, the soluble plugging tool for the tail end of the velocity string comprises a plugging tool nipple 4, wherein the inner wall of the plugging tool nipple 4 is connected with an inner connecting pipe 6, the inner wall of the lower end of the inner connecting pipe 6 is connected with a plugging head seat 8, the lower end of the plugging head seat 8 is connected with a soluble plugging head 12, the lower end of the plugging tool nipple 4 is connected with a guide head 16, and a sand prevention gap 14 is further formed in the side wall of the plugging tool nipple 4.
The lower extreme of shutoff head seat 8 is connected with soluble end cap 12 through the screw thread, the scope of whole shutoff head seat 8 has been sealed up to soluble end cap 12 for liquid can't be from getting into the space of shutoff head seat 8 top in shutoff tool nipple 4, 4 lower extremes of shutoff tool nipple are connected with guide head 16, be used for guiding the lower income of whole shutoff instrument, still open sand control seam 14 on 4 lateral walls of shutoff tool nipple, can guarantee that natural gas and shaft bottom hydrops get into inside 4 of shutoff tool nipple along sand control seam 14, can prevent again that fracturing sand, stratum sand from getting into and blocking shutoff tool nipple 4.
[ example 2 ]
As shown in fig. 1 and fig. 2, on the basis of embodiment 1, a rolling groove 2 is formed at the upper end of the plugging tool nipple 4, a first sealing groove is formed in the outer wall of the plugging tool nipple 4 below the rolling groove 2, and a first sealing ring 3 is connected in the first sealing groove.
The upper end of the plugging tool nipple 4 is provided with a rolling groove 2 so as to be rolled with the lower end of the coiled tubing 1, the outer wall of the plugging tool nipple 4 below the rolling groove 2 is also provided with a sealing groove, and a first sealing ring 3 is connected in the sealing groove, so that when the coiled tubing 1 is rolled onto the plugging tool nipple 4, the inner wall of the coiled tubing 1 and the outer wall of the plugging tool nipple 4 are prevented from air leakage.
And a second sealing groove is formed at the joint of the inner connecting pipe 6 and the plugging tool nipple 4, and a second sealing ring 5 is connected in the second sealing groove. The inner connecting pipe 6 is connected with the plugging tool nipple 4 through a first pin 7, and meanwhile, a second sealing ring 5 is further arranged between the inner connecting pipe 6 and the plugging tool nipple 4, so that air leakage between the inner connecting pipe 6 and the plugging tool nipple 4 is guaranteed.
And a third sealing groove is formed at the joint of the plug seat 8 and the inner connecting pipe 6, and a third sealing ring 9 is connected in the third sealing groove. The plug seat 8 is connected with the inner connecting pipe 6 through a second pin 10, and a third sealing ring 9 is connected between the plug seat 8 and the inner connecting pipe 6, so that air leakage between the plug seat 8 and the inner connecting pipe 6 is guaranteed. Through the sealing of the second sealing ring 5 and the third sealing ring 9, the inlet of the internal channel of the plugging tool nipple 4 is only provided with a plug seat 8, and the plug seat 8 is plugged by a soluble plug 12, so that the gas well fluid is prevented from being produced from the coiled tubing in the construction process.
The soluble plug 12 is also sleeved with a sleeve 13. The sleeve 13 can effectively control the dissolution speed of the soluble plug 12, prevent the soluble plug 12 from melting from the periphery, and prolong the working time of the soluble plug 12 in the well.
The guide head 16 is connected with the plugging tool short section 4 through a third pin 15.
The soluble plug 12 is soluble aluminum. The material of the soluble plug 12 is soluble aluminum.
The sand control joint 14 is positioned on the side wall of the plugging tool short section 4 below the soluble plug 12.
So that the accumulated liquid at the bottom of the well can enter the inner part of the plugging tool nipple 4 through the sand control joint 14 to dissolve the soluble plug 12.
[ example 3 ]
As shown in fig. 1 and 2, on the basis of embodiment 2, a method for using a speed string tail end soluble plugging tool includes rolling a rolling groove 2 at the upper end of a plugging tool nipple 4 to the lower end of a coiled tubing 1, lowering the plugging tool nipple 4 into a gas well shaft along with the coiled tubing 1, dissolving a soluble plug 12 after bottom hole effusion enters the bottom of the plugging tool nipple 4 from a sand prevention seam 14, dropping a sleeve 13 to the bottom of the plugging tool nipple 4, opening an internal channel of the plugging tool nipple 4 plugged by the soluble plug 12 and the sleeve 13, draining and producing gas by using a speed string, and removing the bottom hole effusion.
Rolling the rolling groove 2 at the upper end of the plugging tool nipple 4 on the ground to the lower end of the continuous oil pipe 1, moving the rolling groove and the continuous oil pipe 1 to be lowered into a shaft of the gas well, after pipe lowering operation is completed, accumulated liquid at the bottom of the well enters the plugging tool nipple 4 through the sand prevention seam 14, the soluble plug 12 is slowly dissolved by the accumulated liquid, the sleeve 13 falls to the bottom end of the plugging tool nipple 4 after the soluble plug 12 is completely dissolved, a channel is formed in the plug seat 8 part blocked by the soluble plug 12, a subsequent speed pipe column drainage gas production technology can be carried out, the accumulated liquid at the bottom of the well is removed, and normal.
Claims (8)
1. The utility model provides a soluble shutoff instrument of speed tubular column tail end which characterized in that: the plugging tool nipple comprises a plugging tool nipple (4), wherein an inner connecting pipe (6) is connected to the inner wall of the plugging tool nipple (4), a plug seat (8) is connected to the inner wall of the lower end of the inner connecting pipe (6), a soluble plug (12) is connected to the lower end of the plug seat (8), a guide head (16) is connected to the lower end of the plugging tool nipple (4), and a sand prevention gap (14) is further formed in the side wall of the plugging tool nipple (4).
2. The dissolvable plugging tool of claim 1, wherein: the upper end of the plugging tool nipple (4) is provided with a rolling groove (2), the outer wall of the plugging tool nipple (4) below the rolling groove (2) is provided with a first sealing groove, and a first sealing ring (3) is connected in the first sealing groove.
3. The dissolvable plugging tool of claim 1, wherein: and a second sealing groove is formed in the joint of the inner connecting pipe (6) and the plugging tool nipple (4), and a second sealing ring (5) is connected in the second sealing groove.
4. The dissolvable plugging tool of claim 1, wherein: and a third sealing groove is formed at the joint of the plug seat (8) and the inner connecting pipe (6), and a third sealing ring (9) is connected in the third sealing groove.
5. The dissolvable plugging tool of claim 1, wherein: the soluble plug (12) is also sleeved with a sleeve (13).
6. The dissolvable plugging tool of claim 1, wherein: the guide head (16) is connected with the plugging tool short section (4) through a third pin (15).
7. The dissolvable plugging tool of claim 1, wherein: the soluble plug (12) is soluble aluminum.
8. The dissolvable plugging tool of claim 1, wherein: the sand control joint (14) is positioned on the side wall of the plugging tool nipple (4) below the soluble plug (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922033010.6U CN211666685U (en) | 2019-11-22 | 2019-11-22 | Soluble plugging tool for tail end of speed pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922033010.6U CN211666685U (en) | 2019-11-22 | 2019-11-22 | Soluble plugging tool for tail end of speed pipe column |
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| Publication Number | Publication Date |
|---|---|
| CN211666685U true CN211666685U (en) | 2020-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922033010.6U Active CN211666685U (en) | 2019-11-22 | 2019-11-22 | Soluble plugging tool for tail end of speed pipe column |
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| CN (1) | CN211666685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952949A (en) * | 2019-11-22 | 2020-04-03 | 中国石油天然气股份有限公司 | Soluble plugging tool for tail end of velocity string and using method thereof |
-
2019
- 2019-11-22 CN CN201922033010.6U patent/CN211666685U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952949A (en) * | 2019-11-22 | 2020-04-03 | 中国石油天然气股份有限公司 | Soluble plugging tool for tail end of velocity string and using method thereof |
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