CN202140035U - Directly connected well cementation sleeve column - Google Patents
Directly connected well cementation sleeve column Download PDFInfo
- Publication number
- CN202140035U CN202140035U CN201120202256U CN201120202256U CN202140035U CN 202140035 U CN202140035 U CN 202140035U CN 201120202256 U CN201120202256 U CN 201120202256U CN 201120202256 U CN201120202256 U CN 201120202256U CN 202140035 U CN202140035 U CN 202140035U
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- CN
- China
- Prior art keywords
- direct
- well cementation
- directly connected
- shoe
- sleeve pipe
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- 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
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Abstract
The utility model relates to a directly connected well cementation sleeve column comprising a directly connected sleeve, a spring type floating hoop and a floating shoe. The directly connected sleeve is connected with the spring type floating hoop and the floating shoe in sequential order. The directly connected well cementation sleeve column provided in the utility model has a good anti-stretch strength and a good sealing performance. The inner, outer diameters of the connection part of the connected sleeve column, the floating hoop and the floating shoe are equal to the inner, outer diameters of the directly connected sleeve. After the well cementation working, the floating hoop can be used to provide the inner size of the maximum size of the sleeve after being drilled, thereby the space for the channel in the oil and water well can be saved for the subsequent work. The lower end of the floating shoe is connected with a swirling flow pipe to enable the cement slurry to be exhausted uniformly and stably according to the swirling flow, thereby the directly connected well cementation sleeve column provided in the utility model can be widely applied in the well cementation technology of the petroleum exploitation wells.
Description
Technical field
The utility model relates to oil exploitation down-hole casing post, particularly a kind of direct-connected well cementation casing string.
Background technology
At present, the casing string majority of oil field overhaul construction and production usefulness is the serial tubing string of API standard code, and this tubing string is that great contribution has been made in oil exploitation; But have following shortcoming and defect simultaneously: 1. the small casing of using to well workover has just had many restrictions; Serious like Φ 139.7 casing damage corrosion and damage, use after can't doing general sleeve pipe reparation again, adopt when small casing technology is administered down; Can only be lowered to Φ 89 oil pipes or process in it and revise Φ 101.6 sleeve pipes of box cupling outside dimension; Latus rectum also has only maximum Φ 86mm in the tubing string, just can only descend Φ 60.3 oil pipes when descending flow string again, has restricted the production or the injection flow of this oil well greatly; 2. give subsequent job, produce and cause a series of difficulties.3. for run-down, hot spot is many, the improvement of segment length's oil-water well, it is more little to produce effects, and directly influences the carrying out of well shaft fixing technology engineering.
Summary of the invention
The order of the utility model provides a kind of direct-connected well cementation casing string, adopts the structure that connects spring float collar and float shoe on the direct-connected sleeve pipe, the shortcoming or the deficiency that overcome effectively or avoid existing in the above-mentioned prior art.
The described direct-connected well cementation casing string of the utility model comprises direct-connected sleeve pipe, spring float collar and float shoe.Said direct-connected sleeve pipe is the structure that every sleeve pipe is directly linked to each other by screw thread, and direct-connected sleeve pipe bottom is connected with spring float collar and float shoe in order at interval.
Wherein, said spring float collar is connected in 20～30 meters of end of direct-connected sleeve pipe, and float shoe is connected in the end of direct-connected sleeve pipe.Said spring float collar comprises body and interior gripper shoe, spring, conehead and the seal receptacle of installing in order thereof.Said body is provided with interior shoulder, matches with the outer shoulder of seal receptacle.O type circle is installed on the said seal receptacle.Said float shoe comprises the cyclone pipe that install footwear body and the interior seal receptacle of installing in order, conehead, spring, gripper shoe and end.The cyclone pipe side of said float shoe is circumferentially with the cement paste of being convenient to that spiral is uniformly distributed with and stably flows out through hole by the regulation rotation direction.
The utility model has following advantage compared with prior art:
1, direct-connected effective float collar, float shoe do not need box cupling to connect, and can effectively utilize the spatial dimension in the sleeve pipe.At utmost guaranteed the subsequent job passage in the body.
2, body part is suitable with the splicing sleeve mechanical property, and the internal material drillability can be good.
Import smoothly when 3, direct-connected pipe float shoe cyclone pipe is convenient to lower tubular column and go into behind the well the stable eddy flow of cement paste and discharge.
4, forward, reverse pressure-bearing ability are strong, can satisfy the needs of different well depths.
5, potted component has heatproof, alkaline-resisting, oil resistance.
6, the water cross section diameter of interior fittings has guaranteed the flow that passes through of cement paste, the latus rectum after the body internal diameter guarantees to bore.
7, the connection moment of torsion is big, and the connection moment of torsion that spring float collar box end is connected with direct-connected sleeve pipe is 4200NM, and it is 4330NM that pin end connects moment of torsion.
Description of drawings
Fig. 1 is a kind of example structure sketch map of the utility model;
Fig. 2 is for pressing direct-connected screw connection structure sketch map shown in Figure 1;
Fig. 3 is by the local structure for amplifying sketch map in direct-connected screw thread A place shown in Figure 2;
Fig. 4 is for pressing spring float collar structural representation shown in Figure 1;
Fig. 5 is for pressing spring float shoe structural representation shown in Figure 1.
The specific embodiment
Consult Fig. 1-Fig. 5, a kind of direct-connected well cementation casing string comprises direct-connected sleeve pipe 1, spring float collar 2 and float shoe 3.Direct-connected sleeve pipe is the structure that every sleeve pipe 1 is directly linked to each other by screw thread, and direct-connected sleeve pipe 1 bottom is connected with spring float collar 2 and float shoe 3 in order at interval.
Spring float collar 2 is connected in 20～30 meters of end of direct-connected sleeve pipe 1, and float shoe 3 is connected in the end of direct-connected sleeve pipe 1.Spring float collar 2 comprises body 21 and interior gripper shoe 26, spring 25, conehead 24 and the seal receptacle of installing in order 23 thereof.Body 21 is provided with interior shoulder, matches with the outer shoulder of seal receptacle 23.O type circle 22 is installed on the seal receptacle 23.Float shoe comprises the cyclone pipe 37 that install footwear body 31 and the interior seal receptacle of installing in order 33, conehead 34, spring 35, gripper shoe 36 and end.That cyclone pipe 37 sides of float shoe are circumferentially with is that spiral is uniformly distributed with, be convenient to the duct that cement paste stably flows out by the regulation rotation direction.
Connecting thread 12 places of direct-connected sleeve pipe 1 and spring float collar 2 and float shoe 3 are provided with outer moment of torsion step 11 and internal torque step 13.Screw thread bearing surface angle is 2 °～4 °, is expressed as 3 ° among the figure; Screw thread approaching face angle is 9 °～11 °, is expressed as 10 ° among the figure.The direct-connected screw thread tension test of the utility model is 845.76KN, hydrostatic test is withstand voltage is 55MPa, dwell time 6s.
Claims (7)
1. a direct-connected well cementation casing string comprises direct-connected sleeve pipe, spring float collar and float shoe, it is characterized in that said direct-connected sleeve pipe is the structure that every sleeve pipe is directly linked to each other by screw thread, and direct-connected sleeve pipe bottom is connected with spring float collar and float shoe in order at interval.
2. direct-connected well cementation casing string according to claim 1 is characterized in that said spring float collar is connected in 20～30 meters of end of direct-connected sleeve pipe, and float shoe is connected in the end of direct-connected sleeve pipe.
3. direct-connected well cementation casing string according to claim 1 is characterized in that said spring float collar comprises body and interior gripper shoe, spring, conehead and the seal receptacle of installing in order thereof.
4. direct-connected well cementation casing string according to claim 1 is characterized in that said body is provided with interior shoulder, matches with the outer shoulder of seal receptacle.
5. direct-connected well cementation casing string according to claim 4 is characterized in that being equipped with on the said seal receptacle O type circle.
6. direct-connected well cementation casing string according to claim 1 is characterized in that said float shoe comprises the cyclone pipe that install footwear body and the interior seal receptacle of installing in order, conehead, spring, gripper shoe and end.
7. direct-connected well cementation casing string according to claim 6, the cyclone pipe side that it is characterized in that said float shoe are circumferentially with being convenient to that spiral is uniformly distributed with, and cement paste is stable to flow out through hole by the regulation rotation direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120202256U CN202140035U (en) | 2011-06-16 | 2011-06-16 | Directly connected well cementation sleeve column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120202256U CN202140035U (en) | 2011-06-16 | 2011-06-16 | Directly connected well cementation sleeve column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202140035U true CN202140035U (en) | 2012-02-08 |
Family
ID=45551096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120202256U Expired - Fee Related CN202140035U (en) | 2011-06-16 | 2011-06-16 | Directly connected well cementation sleeve column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202140035U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865040A (en) * | 2012-10-17 | 2013-01-09 | 天津德瑞克石油工具有限公司 | Sleeve buoyancy weight reduction system |
-
2011
- 2011-06-16 CN CN201120202256U patent/CN202140035U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865040A (en) * | 2012-10-17 | 2013-01-09 | 天津德瑞克石油工具有限公司 | Sleeve buoyancy weight reduction system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20120616 |