CN203603835U - Underground dart-type blocking tool used for coiled tubing - Google Patents
Underground dart-type blocking tool used for coiled tubing Download PDFInfo
- Publication number
- CN203603835U CN203603835U CN201320802557.8U CN201320802557U CN203603835U CN 203603835 U CN203603835 U CN 203603835U CN 201320802557 U CN201320802557 U CN 201320802557U CN 203603835 U CN203603835 U CN 203603835U
- Authority
- CN
- China
- Prior art keywords
- locking
- mandrel
- top connection
- coiled tubing
- guide shoe
- 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.)
- Expired - Lifetime
Links
- 230000000903 blocking effect Effects 0.000 title abstract 3
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 210000002445 nipple Anatomy 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 15
- 239000012224 working solution Substances 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The utility model discloses an underground dart-type blocking tool used for a coiled tubing. The blocking tool comprises a dart mechanism and a work barrel mechanism, wherein the dart mechanism comprises a first upper connector, a mandrel and a guide shoe, the first upper connector is fixedly arranged at the upper end of the mandrel, the guide shoe is fixedly arranged at the lower end of the mandrel, the mandrel between the first upper connector and the guide shoe is provided with a first locking structure, and the mandrel between the first locking structure and the guide shoe is provided with a first sealing structure; the work barrel structure comprises a second upper connector and a plug, the inside of the second upper connector is provided with a second locking structure matched with the first locking structure in locking, the inner wall of the second upper connector on the lower portion of the second locking structure is provided with a second sealing structure matched with the first sealing structure in a sealed mode, and the plug is located in the second upper connector and is fixedly arranged at the lower end of the second upper connector. A coiled tubing speed string can be taken out in a pressure state, primary well killing is unnecessary, and the amount of working solutions entering a stratum is substantially reduced.
Description
Technical field
The utility model relates to down-hole dartlike weapon formula calker for a kind of coiled tubing, for pressure coiled tubing speed pipe string, belongs to petroleum gas down-hole workover treatment technical field.
Background technology
Coiled tubing speed pipe string technology is a conventional and important technology in oil gas field workover treatment, is usually used in gas well and produces later stage water outlet, and gas production declines.Be lowered to after pipe with small pipe diameter coiled tubing speed pipe string, can increase the flowing velocity of natural gas, improve the fluid-carrying capability of natural gas, recover gas well deliverability.Coiled tubing speed pipe string can be lowered to the in the situation that of not kill-job, has avoided the pollution of well killing fluid to payzone, after running speed pipe string, can reproduce very soon, has reduced the off-time.
But coiled tubing speed pipe string was produced after a period of time in well, consider the corrosion of medium to coiled tubing in well, need to regularly trip out coiled tubing to avoid coiled tubing to fall because corroding to break, and in prior art, China Patent No. " 201320142452.4 " discloses a kind of calker for the test of minor diameter coiled tubing, open day is on 09 11st, 2013, be connected and go into the well with coiled tubing coupling part, auxiliary coiled tubing and tester are tested stratum, mainly salvage part by sealing, anchor portion, latching segment composition is conciliate in lock part, this calker can depart from coiled tubing before production test, make coiled tubing continue descending and complete production test with tester, after finishing, test jobs can ground be proposed in the lump with coiled tubing and tester.The coiled tubing that only recurs out after kill-job, uses well killing fluid kill-job, and the one, increase the activity duration; The 2nd, well killing fluid may damage stratum; The 3rd, well killing fluid may cause environment pollution; The 4th, after kill-job, need to carry out the induced flow operation of long period.In addition, but this technology is only applicable to minor diameter coiled tubing test uses.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above that prior art exists, and down-hole dartlike weapon formula calker for a kind of coiled tubing is provided.The utility model can be realized with pressure coiled tubing speed pipe string, and needn't first kill-job, the work liquid measure that has significantly reduced to enter stratum.
For achieving the above object, the technical solution adopted in the utility model is as follows:
Down-hole dartlike weapon formula calker for a kind of coiled tubing, it is characterized in that: comprise dartlike weapon mechanism and seating nipple mechanism, described dartlike weapon mechanism comprises the first top connection, mandrel and guide shoe, described the first top connection is fixedly installed on mandrel upper end, guide shoe is fixedly installed on mandrel lower end, on mandrel between the first top connection and guide shoe, be provided with the first locking structure, on the mandrel between the first locking structure and guide shoe, be provided with the first hermetically-sealed construction; Described seating nipple mechanism comprises the second top connection and stopper, in the second top connection, be provided with the second locking structure that coordinates locking with the first locking structure, on the second top connection inwall of the second locking structure bottom, be provided with the second hermetically-sealed construction with the first hermetically-sealed construction fitted seal, stopper is positioned at the second top connection, and is fixedly installed on the second top connection lower end.
Described the first locking structure comprises lock sleeve, and lock sleeve is on the mandrel between the first top connection and guide shoe, and lock sleeve lower end is provided with the outer step of locking; The second locking structure comprises step in locking, and in locking, step is arranged in the second top connection and coordinates locking with the outer step of locking.
Described the first hermetically-sealed construction comprises the first sealing ring, and the first sealing ring is outside locking on the mandrel between step and guide shoe; The second hermetically-sealed construction comprises sealing surface, and sealing surface is positioned on the second top connection inwall of locking step bottom and the first sealing ring fitted seal.
Described stopper is fixedly installed on the second top connection lower end by pin, is provided with the second sealing ring coordinating with the second top connection inwall on stopper outer wall.
Employing the utility model has the advantage of:
One, use the utility model can realize with pressure coiled tubing speed pipe string, and needn't first kill-job, significantly reduce to enter the work liquid measure on stratum, so not only save operating cost, avoid the pollution of working solution to stratum, and after snubbing serving, reproduce sooner, significantly reduce because of the economic loss brought of stopping production.
Two, drop into after dartlike weapon mechanism, send into seating nipple by pumping mode and stop up coiled tubing, change and can obviously judge whether dartlike weapon enters seating nipple according to pump pressure.
Three, the utility model drops into dartlike weapon before a coiled tubing speed pipe string, realize the obstruction to coiled tubing lower end, drive a well after release, can the in the situation that of not kill-job, dock coiled tubing and trip out coiled tubing speed pipe string, be skillfully constructed, simple in structure, can realize reliably coiled tubing speed pipe string with pressure.
To sum up, before lower coiled tubing speed pipe string, connect a seating nipple mechanism in pipe string lower end, before coiled tubing speed pipe string, drop into a solid dartlike weapon mechanism need to rise, and send into seating nipple by pumping mode, and locked by lockable mechanism, can not move up and down, dartlike weapon mechanism and seating nipple are inter-agency realizes sealing by sealing ring, thereby realize the obstruction in coiled tubing, well inner high voltage fluid can not flow to ground through coiled tubing, play coiled tubing speed pipe string thereby realize not kill-job.
Accompanying drawing explanation
Fig. 1 is the utility model dartlike weapon mechanism structural representation
Fig. 2 is the utility model seating nipple mechanism structure schematic diagram
In figure, be labeled as: 1, the first top connection, 2, mandrel, 3, lock sleeve, 4, the outer step of locking, 5, the first sealing ring, 6, guide shoe, 7, the second top connection, 8, step 9, sealing surface in locking, 10, stopper, 11, the second sealing ring, 12, pin.
The specific embodiment
Down-hole dartlike weapon formula calker for a kind of coiled tubing, comprise dartlike weapon mechanism and seating nipple mechanism, described dartlike weapon mechanism comprises the first top connection 1, mandrel 2 and guide shoe 6, described the first top connection 1 is fixedly installed on mandrel 2 upper ends, guide shoe 6 is fixedly installed on mandrel 2 lower ends, on mandrel 2 between the first top connection 1 and guide shoe 6, be provided with the first locking structure, on the mandrel 2 between the first locking structure and guide shoe 6, be provided with the first hermetically-sealed construction; Described seating nipple mechanism comprises the second top connection 7 and stopper 10, in the second top connection 7, be provided with the second locking structure that coordinates locking with the first locking structure, on the second top connection 7 inwalls of the second locking structure bottom, be provided with the second hermetically-sealed construction with the first hermetically-sealed construction fitted seal, stopper 10 is positioned at the second top connection 7, and is fixedly installed on the second top connection 7 lower ends.Seating nipple mechanism forms band and depresses the blanking plug that coiled tubing is used.
Preferred embodiment of the present utility model is, described the first locking structure comprises lock sleeve 3, and lock sleeve 3 is on the mandrel 2 between the first top connection 1 and guide shoe 6, and lock sleeve 3 lower ends are provided with the outer step 4 of locking; The second locking structure comprises step 8 in locking, and in locking, step 8 is arranged in the second top connection 7 and coordinates locking with the outer step 4 of locking.Adopt the design of mandrel step, in the time that its below fluid pressure is greater than top fluid pressure, on mandrel, move, outwards push locking step, form reliable locking.
Another preferred embodiment of the present utility model is, described the first hermetically-sealed construction comprises that the first sealing ring 5, the first sealing rings 5 are outside locking on the mandrel 2 between step 4 and guide shoe 6; The second hermetically-sealed construction comprises sealing surface 9, and sealing surface 9 is positioned on the second top connection 7 inwalls of locking step 8 bottoms and the first sealing ring 5 fitted seal.
Another preferred embodiment of the present utility model is that described stopper 10 is fixedly installed on the second top connection 7 lower ends by pin 12, is provided with the second sealing ring 11 coordinating with the second top connection 7 inwalls on stopper 10 outer walls.
Operating principle of the present utility model is as follows:
When lower coiled tubing speed pipe string, seating nipple mechanism is connected to coiled tubing lower end, install coiled tubing speed pipe string to hanger and install wellhead assembly and ground flow, mode by infusion nitrogen in coiled tubing is cut off the pin blanking plug, realize being communicated with of medium in coiled tubing and well, natural gas, water and other stratum output objects arrive ground flow by coiled tubing.
Coiled tubing speed pipe string was produced after a period of time, if need trip out coiled tubing inspection or carry out other later stage workover treatments, only need drop into dartlike weapon mechanism from well head, send dartlike weapon mechanism to enter seating nipple by pumping mode, dartlike weapon mechanism enters after seating nipple mechanism, under pumping fluid and Action of Gravity Field, mandrel and the lock sleeve of dartlike weapon mechanism are subjected to displacement, the relative lock sleeve of mandrel moves down, lock sleeve lower end enters in the chamber of the interior step of locking in seating nipple mechanism, lock sleeve is locked between step in the locking of step and seating nipple mechanism outside its locking under elastic force effect, when below dartlike weapon mechanism, fluid pressure is higher than top fluid pressure, on mandrel, move, the outwards outer step of locking on extruding lock sleeve, form locking reliably, with in blocking-up blanking plug above coiled tubing with well in high-pressure fluid.At this moment just may play other preparations of coiled tubing and the work of with pressure continuous oil pipe.
Claims (4)
1. a down-hole dartlike weapon formula calker for coiled tubing, it is characterized in that: comprise dartlike weapon mechanism and seating nipple mechanism, described dartlike weapon mechanism comprises the first top connection (1), mandrel (2) and guide shoe (6), described the first top connection (1) is fixedly installed on mandrel (2) upper end, guide shoe (6) is fixedly installed on mandrel (2) lower end, on mandrel (2) between the first top connection (1) and guide shoe (6), be provided with the first locking structure, on the mandrel (2) between the first locking structure and guide shoe (6), be provided with the first hermetically-sealed construction; Described seating nipple mechanism comprises the second top connection (7) and stopper (10), in the second top connection (7), be provided with the second locking structure that coordinates locking with the first locking structure, on the second top connection (7) inwall of the second locking structure bottom, be provided with the second hermetically-sealed construction with the first hermetically-sealed construction fitted seal, stopper (10) is positioned at the second top connection (7), and is fixedly installed on the second top connection (7) lower end.
2. down-hole dartlike weapon formula calker for coiled tubing according to claim 1, it is characterized in that: described the first locking structure comprises lock sleeve (3), lock sleeve (3) is positioned on the mandrel (2) between the first top connection (1) and guide shoe (6), and lock sleeve (3) lower end is provided with the outer step (4) of locking; The second locking structure comprises step (8) in locking, and in locking, step (8) is arranged in the second top connection (7) and coordinates locking with the outer step (4) of locking.
3. down-hole dartlike weapon formula calker for coiled tubing according to claim 2, it is characterized in that: described the first hermetically-sealed construction comprises the first sealing ring (5), the first sealing ring (5) is positioned on the mandrel (2) between the outer step (4) of locking and guide shoe (6); The second hermetically-sealed construction comprises sealing surface (9), and sealing surface (9) is positioned on the second top connection (7) inwall of locking step (8) bottom and the first sealing ring (5) fitted seal.
4. according to down-hole dartlike weapon formula calker for the coiled tubing described in claim 1,2 or 3, it is characterized in that: described stopper (10) is fixedly installed on the second top connection (7) lower end by pin (12), on stopper (10) outer wall, be provided with the second sealing ring (11) coordinating with the second top connection (7) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320802557.8U CN203603835U (en) | 2013-12-09 | 2013-12-09 | Underground dart-type blocking tool used for coiled tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320802557.8U CN203603835U (en) | 2013-12-09 | 2013-12-09 | Underground dart-type blocking tool used for coiled tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203603835U true CN203603835U (en) | 2014-05-21 |
Family
ID=50716512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320802557.8U Expired - Lifetime CN203603835U (en) | 2013-12-09 | 2013-12-09 | Underground dart-type blocking tool used for coiled tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203603835U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929560A (en) * | 2015-06-15 | 2015-09-23 | 宝鸡市赛孚石油机械有限公司 | Sand-prevention blanking plug |
| CN105064940A (en) * | 2015-08-21 | 2015-11-18 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Built-in continuous oil tube well completion tube column and construction method thereof |
-
2013
- 2013-12-09 CN CN201320802557.8U patent/CN203603835U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929560A (en) * | 2015-06-15 | 2015-09-23 | 宝鸡市赛孚石油机械有限公司 | Sand-prevention blanking plug |
| CN105064940A (en) * | 2015-08-21 | 2015-11-18 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Built-in continuous oil tube well completion tube column and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200910 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING Co. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 610051, Sichuan Province, Chenghua District, Chengdu two ring road, paragraph 6, four North Ruifeng Lane Patentee before: DOWNHOLE OPERATION COMPANY, CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |
|
| CX01 | Expiry of patent term |