CN204252927U - Well cementing tool - Google Patents
Well cementing tool Download PDFInfo
- Publication number
- CN204252927U CN204252927U CN201420650215.3U CN201420650215U CN204252927U CN 204252927 U CN204252927 U CN 204252927U CN 201420650215 U CN201420650215 U CN 201420650215U CN 204252927 U CN204252927 U CN 204252927U
- Authority
- CN
- China
- Prior art keywords
- central post
- cementing tool
- well
- sleeve pipe
- expander
- 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 - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000003801 milling Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model provides a pair of well cementation instrument for the wrong department of sleeve pipe in the fixed well, well cementation instrument includes: a central post extending lengthwise, the central post having first and second opposite ends, the first end being connectable to a connector; an expansion body wrapped around an outer wall of the center post between the first end and the second end, the expansion body capable of increasing in volume upon contact with water; the surface of the expansion body, which is opposite to the central column, is provided with a liquid inlet groove which extends along the extension direction of the central column; and the guide cone is fixedly connected with the second end. The utility model provides a pair of well cementation instrument can right the dislocation sleeve pipe in the well, carries out the well cementation to the dislocation sleeve pipe through normal well cementation method.
Description
Technical field
The present invention relates to oil and gas exploitation field, particularly relate to a kind of cementing tool.
Background technology
Along with deepening continuously of oil field development, Casing Failure deformed damaged is day by day serious.Casing failure, according to the degree damaged and character, can be divided into three types: casing deformation, casing collapse and casing-broken.Casing deformation be due to pressure change make sleeve pipe external and internal pressure disequilibrium and exceed sleeve pipe compressive strength time, just may there is necking down, the deformed damaged such as crowded flat or bending in a place or many places in sleeve pipe; Casing collapse causes phenomenon casing wall creating hole or crack for various reasons; Casing-broken refers to that sleeve pipe axially ruptures, and the double-deformation that there occurs displacement in the radial direction thereof superposes the serious casing failure caused.The main cause of casing-broken is subject to strata pressure extruding, high pressure water injection, high-pressure gas injection, improperly workover treatment etc., once there is oil well casing bad break, a large amount of silt enters pit shaft, other layer of position liquid flows into, flow string cannot be gone into the well, cause oil well to stop production to scrap, immeasurable infringement is produced to oil field development.
At present, change casing technology can be adopted to repair bad break sleeve pipe, or adopt Sidetracking Technology to make cement return high above position bad break oil well to resume production.The principle of change casing technology is: adopt special packaged milling tool (kit such as milling bit, casing section mill), the cement sheath of cover milling its vicinity and part rock, make sleeve pipe freely, adopt the mode of cutting or back-off cover to be damaged some sleeve pipe that is above and following suitable position to take out, then enter down new casing make-up or mend with rejoining device to connect, the sleeve pipe of damage is changed, reaches the object of reparation.Although the sleeve pipe of bad break can be repaired by change casing technology completely, this construction technology cycle is long, and workload is large, and cost is high.Sidetracking Technology fixes a whipstock in a certain certain depth of oil-water well, utilizes the deflecting on its inclined-plane and lead oblique effect, windows, get out new well, then descend a whole set of technology of drilling liner cementing from window with milling cone in the side of sleeve pipe.This technique will carry out sidetracking construction, and workload is large, costly.
Utility model content
The purpose of this utility model is to provide a kind of cementing tool for fixing well inner sleeve bad break place, this instrument can in well righting bad break sleeve pipe, by normal cementing method, bad break sleeve pipe is cemented the well.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize: a kind of cementing tool, for fixing well inner sleeve bad break place, described cementing tool comprises: the central post that lengthwise extends, described central post have back to first end and the second end, described first end can connect connector; Be wrapped in the expander of first end described in described central post and the outer wall between described second end, described expansion physical efficiency volume after contact water becomes large; Described expander is provided with the lead channel that the bearing of trend along described central post extends back to the surface of described central post; The starting taper be fixedly connected with described second end.
Preferably, the material of described expander is timber.
Preferably, the material of described starting taper is iron.
The beneficial effect of a kind of cementing tool that the utility model provides is: a kind of cementing tool that the utility model provides wraps up expander on central post, expansion physical efficiency volume after contact water becomes large, this cementing tool is lowered into bad break sleeve pipe place, down-hole by tubing string, then fetch water in pit shaft, expander volume after chance water becomes and to expand greatly thus by the place's righting of bad break sleeve pipe, and then by normal cementing method: mud of first fetching water is beaten displacement fluid again and is cemented the well.This cement paste enters casing-broken place by the lead channel being arranged at expander and extending back to the surface of central post and along the bearing of trend of central post, make this cement paste be full of casing-broken place and cement-free returns high part, beating displacement fluid is the cement paste replaced out in tubing string.A kind of cementing tool that the utility model provides can in well righting bad break sleeve pipe, by normal cementing method, bad break sleeve pipe is cemented the well.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 the utility model schematic diagram;
Fig. 2 the utility model top view.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the utility model provides a kind of cementing tool 10 for fixing well inner sleeve bad break place, and it comprises: lengthwise extend central post 11, described central post have back to first end 13 and the second end 15, described first end 13 can connect connector; Be wrapped in the expander 17 of first end 13 described in described central post 11 and the outer wall between described second end 15, described expander 17 can become large by volume after contact water; Described expander 17 is provided with the lead channel 19 that the bearing of trend along described central post 11 extends back to the surface of described central post 11; The starting taper 21 be fixedly connected with described second end 15.
A kind of cementing tool 10 that the utility model provides, central post 11 wraps up expander 17, expander 17 can become large by volume after contact water, this cementing tool 10 is lowered into bad break sleeve pipe place, down-hole by tubing string, then fetch water in pit shaft, expander 17 volume after chance water becomes and to expand greatly thus by the place's righting of bad break sleeve pipe, and then by normal cementing method: mud of first fetching water is beaten displacement fluid again and is cemented the well.This cement paste enters casing-broken place by the lead channel 19 being arranged at expander 17 and extending back to the surface of central post 11 and along the bearing of trend of central post 11, make this cement paste be full of casing-broken place and cement-free returns high part, beating displacement fluid is the cement paste replaced out in tubing string.A kind of cementing tool 10 that the utility model provides can in well righting bad break sleeve pipe, by normal cementing method, bad break sleeve pipe is cemented the well.
A kind of cementing tool 10 that the utility model provides can be applied to the exploitation field of oil well, the natural gas well.
As shown in Figure 1, in the present embodiment, central post 11 be one lengthwise extend cylinder, this central post 11 have back to first end 13 and the second end 15, this first end 13 can connect connector; Can be connected with outside tubing string by this central post 11 of connector, thus by outside tubing string, this cementing tool 10 can be lowered in well, to repair the bad break sleeve pipe place in well.
Outer wall between the first end 13 and the second end 15 of this central post 11 is enclosed with expander 17, this expander 17 can become large by volume after contact water, when being full of water in pit shaft, this expander 17 will expand in the radial direction at casing-broken place, the displacement that bad break sleeve pipe is occurred diametrically is repaired, thus by the place's righting of bad break sleeve pipe.In the present embodiment, the material of expander 17 is timber.
As shown in Figure 2, in the present embodiment, to be provided with at this expander 17 lead channel 19 that the bearing of trend along central post 11 extends back to the surface of central post 11, when this lead channel 19 is for cementing the well, cement paste flows into the passage at bad break pipe place.
Be fixedly connected with starting taper 21 at the second end 15 of central post 11, this starting taper 21 is lowered into ash plug place in pit shaft for guiding this cementing tool 10, and at this cementing tool 10 of top braces of ash plug.In the present embodiment, the material of starting taper 21 is iron.This starting taper 21 adopts with the connection of central post 11 and is threaded, but connected mode is not limited thereto, and can also have other connected mode, such as, weld.
The process that a kind of cementing tool 10 that the utility model provides fixes well inner sleeve bad break place is as follows: first side leans out the bad break position of down-hole bad break tubing string, then enter to note grey tubing string down, the ash plug of 5 meters of notes 30 meters below bad break position, after ash plug solidifies, connect with outside tubing string and give up, give up and connect the first end 13 of central post 11 of this cementing tool 10, thus form one by outside tubing string, give up and a whole set of part of being cascaded of cementing tool 10, by in this whole set of part lower going-into-well cylinder, this a whole set of part is guided down to the ash plug top in pit shaft by the starting taper 21 on cementing tool 10 thus this whole set of part is seated this ash plug top.Suitably can pressurize as do not reached precalculated position, can precalculated position be arrived.
Outside tubing string in this whole set of part is suppressed, gives up and put this cementing tool 10 aside, outside tubing string and cementing tool 10 are separated, and cementing tool 10 is still seated ash plug top.Fetch water in pit shaft, be full of water around cementing tool after, expander 17 water-swellable on cementing tool 10, volume becomes large, thus volume becomes the displacement that large expander 17 makes bad break sleeve pipe occur diametrically is repaired, thus by the place's righting of bad break sleeve pipe.
This cementing tool 10 is made to be soaked in water after 24 hours, externally squeeze into deployed cement paste in tubing string, this cement paste is clamp-oned in well, cement paste enters casing-broken place along the lead channel 19 of this cementing tool 10, cement paste can enter annular section between sleeve pipe and the borehole wall by section, completes well cementation.Squeeze into the cement paste of reservation amount, be full of casing-broken place and cement-free returns high part, then squeeze into clear water and replace out cement paste in tubing string.
Externally sleeve pipe is suppressed the cement paste face horizontal sliding 50 meters of exterior tube column bottom, Hou Ning with pressure 24 hours, as defectively in pressure testing can again squeeze ash, and pressure testing is qualified carries out next step operation.
Trip out the outside tubing string in well, under enter to bore milling tubing string, bore and open top ash plug and cementing tool 10, trip out and bore milling tubing string, empty wellbore pressure test, as defectively in pressure testing again enter down this cementing tool 10 and cement the well, the ash plug of 30 meters can be bored out after qualified, lower flow string production.
The foregoing is only several embodiment of the present utility model, those skilled in the art can carry out various change or modification to the utility model embodiment according to content disclosed in application documents and not depart from spirit and scope of the present utility model.
Claims (3)
1. a cementing tool, is characterized in that, for fixing well inner sleeve bad break place, described cementing tool comprises:
Lengthwise extend central post, described central post have back to first end and the second end, described first end can connect connector;
Be wrapped in the expander of first end described in described central post and the outer wall between described second end, described expansion physical efficiency volume after contact water becomes large; Described expander is provided with the lead channel that the bearing of trend along described central post extends back to the surface of described central post;
The starting taper be fixedly connected with described second end.
2. cementing tool as claimed in claim 1, is characterized in that: the material of described expander is timber.
3. cementing tool as claimed in claim 1, is characterized in that: the material of described starting taper is iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420650215.3U CN204252927U (en) | 2014-11-03 | 2014-11-03 | Well cementing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420650215.3U CN204252927U (en) | 2014-11-03 | 2014-11-03 | Well cementing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204252927U true CN204252927U (en) | 2015-04-08 |
Family
ID=52957247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420650215.3U Expired - Fee Related CN204252927U (en) | 2014-11-03 | 2014-11-03 | Well cementing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204252927U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725659A (en) * | 2017-11-02 | 2020-01-24 | 江苏华淼电子科技有限公司 | Water conservancy construction drilling blocking rod and preparation method thereof |
| RU198219U1 (en) * | 2019-12-30 | 2020-06-25 | Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" | Device for creating wooden artificial slaughter |
-
2014
- 2014-11-03 CN CN201420650215.3U patent/CN204252927U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725659A (en) * | 2017-11-02 | 2020-01-24 | 江苏华淼电子科技有限公司 | Water conservancy construction drilling blocking rod and preparation method thereof |
| CN110725659B (en) * | 2017-11-02 | 2021-11-23 | 江苏华淼电子科技有限公司 | Water conservancy construction drilling blocking rod and preparation method thereof |
| RU198219U1 (en) * | 2019-12-30 | 2020-06-25 | Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" | Device for creating wooden artificial slaughter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 |