CN217999526U - Positioning seal reliable in anchoring - Google Patents
Positioning seal reliable in anchoring Download PDFInfo
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- CN217999526U CN217999526U CN202221111801.1U CN202221111801U CN217999526U CN 217999526 U CN217999526 U CN 217999526U CN 202221111801 U CN202221111801 U CN 202221111801U CN 217999526 U CN217999526 U CN 217999526U
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- mandrel
- anchoring
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Abstract
The utility model relates to a positioning seal with reliable anchoring, which comprises an upper pipe column and a mandrel which are connected together from top to bottom; the mandrel is sequentially provided with a positioning step, an anchor fluke and a sealing body from top to bottom outside the mandrel, the positioning step is fixed on the outer wall of the mandrel, a pin is arranged between the anchor fluke and the mandrel, a shear pin is arranged between the sealing body and the mandrel, the lower end of the sealing body is provided with an anti-falling ring on the outer wall of the mandrel, and a push ring is arranged at the bottom of the anchor fluke and above the sealing body outside the mandrel. Sealing rings are arranged between the upper end and the lower end of the inner wall of the sealing body and the outer wall of the mandrel. The top of the sealing body is provided with an annular groove corresponding to the push ring. The utility model can support the anchor fluke with the positioning seal for anchoring, thereby ensuring the anchoring to be reliable and avoiding the anchoring failure caused by overlarge upward fleeing force of the pipe column; meanwhile, a mechanism for manually releasing the anchoring support after the pipe column is blocked is designed, so that the production requirement can be met by the tool, and the anchoring and releasing functions are realized.
Description
Technical Field
The utility model relates to a technical field of oil industry oil gas exploitation production string instrument especially relates to a reliable location of anchoring is sealed.
Background
The uppermost inserted seal of the prior layering pipe column of the oil-water well is commonly called a positioning seal because the uppermost inserted seal has the positioning function. Sometimes to prevent the entire stratified string from upswing, the set seal is fixed using a known anchored set seal and top packer engagement. Due to the known anchoring structure of the positioning seal with the anchor, when the pressure difference between the upper part and the lower part of the positioning seal is too large, the upward movement force of the pipe column is larger than the biting force of the anchoring mechanism, and the anchoring function of the positioning seal with the anchor can be failed. Furthermore, when a releasing pipe column is adopted in a horizontal well or a highly deviated well, a known positioning seal with an anchor is used, and when the flow of the produced fluid of a stratum is high, the positioning seal with the anchor is usually flushed away from the original position of the positioning seal, so that the corresponding pipe column is displaced and fails.
Disclosure of Invention
The utility model aims to solve the defects of the prior art and provide a positioning seal with reliable anchoring.
The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:
a positioning seal with reliable anchoring comprises an upper tubular column and a mandrel which are connected together up and down; the mandrel is sequentially provided with a positioning step, an anchor fluke and a sealing body from top to bottom outside the mandrel, the positioning step is fixed on the outer wall of the mandrel, a pin is arranged between the anchor fluke and the mandrel, a shear pin is arranged between the sealing body and the mandrel, the lower end of the sealing body is provided with an anti-falling ring on the outer wall of the mandrel, and a push ring is arranged at the bottom of the anchor fluke and above the sealing body outside the mandrel.
Sealing rings are arranged between the upper end and the lower end of the inner wall of the sealing body and the outer wall of the mandrel.
The top of the sealing body is provided with an annular groove corresponding to the push ring.
The top of the sealing body is in a round platform structure with a narrow upper part and a wide lower part.
A connecting column is arranged between the upper pipe column and the mandrel, an upper threaded hole for connecting the upper pipe column is arranged at the top of the connecting column, and a lower threaded hole for connecting the mandrel is arranged at the bottom of the connecting column.
The longitudinal section of the positioning step is of an inverted T-shaped structure.
The upper end and the lower end of the outer wall of the sealing body are provided with annular grooves for installing sealing rings.
The utility model has the advantages that: the utility model can support the anchor fluke with the positioning seal for anchoring, thereby ensuring the anchoring to be reliable and avoiding the anchoring failure caused by overlarge upward fleeing force of the pipe column; meanwhile, a mechanism for manually releasing the anchoring support after the pipe column is clamped is designed, so that the tool can meet the production requirement, and the anchoring and releasing functions are realized.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
in the figure: 1, putting a pipe column; 2-mandrel; 3, positioning a step; 4-a fluke; 5-sealing the body; 6-pin; 7-cutting nails; 8-anti-drop ring; 9-a push ring; 10-a sealing ring; 11-an annular groove; 12-a connecting column; 13-an annular groove;
the following detailed description will be made with reference to the accompanying drawings in conjunction with embodiments of the present invention.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
as shown in fig. 1 to 2, an anchoring reliable positioning seal comprises an upper pipe string 1 and a mandrel 2 connected together one above the other; the mandrel 2 is sequentially provided with a positioning step 3, an anchor fluke 4 and a sealing body 5 from top to bottom, the positioning step 3 is fixed on the outer wall of the mandrel 2, a pin 6 is arranged between the anchor fluke 4 and the mandrel 2, a shear pin 7 is arranged between the sealing body 5 and the mandrel 2, the lower end of the sealing body 5 is provided with an anti-falling ring 8 on the outer wall of the mandrel 2, and a push ring 9 is arranged at the bottom of the anchor fluke 4 and above the sealing body 5 outside the mandrel 2.
The shearing force of the pin 6 is set to be about 30 tons, so that the shearing pin 6 is lifted when the anchor fluke 4 is clamped in the production pipe column; and then the upper tubular column 1 is put down, the sealing body 5 is pushed by the push ring 9 to move downwards relative to the anchor fluke 4, so that the anchor fluke 4 loses support, and the engagement between the anchor fluke 4 and the thread of the top packer is released.
The shear force of the shear pin 7 is set within the values of the anchor fluke 4 own elasticity and the top packer thread engagement force (typically around 5 tons), and for safety reasons the shear force of the shear pin 7 can be determined to be 2 tons.
Sealing rings 10 are arranged between the upper end and the lower end of the inner wall of the sealing body 5 and the outer wall of the mandrel 2.
The top of the sealing body 5 is provided with an annular groove 11 corresponding to the push ring 9.
The top of the sealing body 5 is in a truncated cone-shaped structure with a narrow upper part and a wide lower part.
A connecting column 12 is arranged between the upper pipe column 1 and the mandrel 2, an upper threaded hole for connecting the upper pipe column 1 is arranged at the top of the connecting column 12, and a lower threaded hole for connecting the mandrel 2 is arranged at the bottom of the connecting column.
The longitudinal section of the positioning step 3 is of an inverted T-shaped structure.
The upper end and the lower end of the outer wall of the sealing body 5 are provided with annular grooves 13 for installing the sealing rings 10.
Putting down the production string, and putting down the production string in place when the positioning step 3 of the tool reaches the upper end face of the top packer; at this point, the seal body 5 is inserted into the seal cartridge of the top packer and the fluke 4 is threadingly engaged with the top packer upper portion to achieve the basic purpose of a positional seal and its anchoring.
When the upper and lower pressure difference of the sealing body 5 is overlarge, the pressure difference has an upward thrust to the sealing body 5, when the thrust is larger than the shearing force of the shear pin 7, the shear pin 7 is sheared, the sealing body 5 moves upwards, the circular truncated cone-shaped structure of the sealing body 5 is in contact with the anchor fluke 4, so that the anchor fluke 4 is supported, a rebound space is not reserved for the anchor fluke 4, the engagement of the anchor fluke 4 and a top packer screw thread is guaranteed, the purposes of preventing the mandrel 2 from moving upwards and preventing the whole production string from moving upwards are achieved, and meanwhile, the sealing body 5 is also fixed. The push ring 9 is used for recovering the tool, the pipe column is pressed downwards, the push ring 9 moves downwards along with the mandrel 2 for a certain distance, the sealing body 5 is pushed downwards, the sealing body 5 is made to move downwards to lose the support of the fluke 4 due to the fact that the circular truncated cone-shaped structure moves downwards, the fluke 4 can rebound towards the direction of the axis of the tool when the pipe column is pulled vigorously, and then the fluke 4 loses the meshing with the thread of the top packer to be lifted and activated, so that the purpose of recovering the tool is achieved.
The utility model discloses the instrument is used to the water injection tubular column as an example.
1. And (5) putting a water injection pipe column.
The utility model discloses the instrument is the same with well-known connection location sealing operation. From the bottom up, the separate layer water injection pipe column is connected, each water distributor is connected and the sealing is inserted. After the water injection string is put in place, the utility model discloses fluke 4 of instrument receives metal self elasticity and the meshing of top packer screw thread.
2. And (5) injecting water.
When water is injected into the well, if the pressure difference between the upper part and the lower part of the sealing body 5 is overlarge, the pipe column tends to be jacked up, and the shear pin 7 is firstly sheared; the sealing body 5 moves upwards, and the circular truncated cone structure moves upwards to support the fluke 4, so that the fluke 4 is meshed with the thread of the top packer without disengaging.
3. And lifting the pipe column.
When the water injection pipe column in the well needs to be lifted, the lifting tonnage is larger than the shearing force value of the pin 3 at the positioning sealing position, then the pipe column is lowered, and the round platform-shaped structure of the sealing body 5 is pressed down; and lifting the pipe column, wherein the excessive lifting force is larger than the engaging force formed by the self elasticity of the fluke 4, and continuously lifting the pipe column to lift the water injection pipe column.
Other tubular columns which need to improve the anchoring positioning sealing can also be used.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.
Claims (7)
1. The positioning seal with reliable anchoring is characterized by comprising an upper tubular column (1) and a mandrel (2) which are connected together up and down; dabber (2) outer from the top down is equipped with location step (3), fluke (4), seal (5) in proper order, location step (3) are fixed on dabber (2) outer wall, be equipped with between fluke (4) and dabber (2) pin (6), be equipped with between seal (5) and dabber (2) shear pin (7), be equipped with on dabber (2) outer wall at seal (5) lower extreme and prevent falling ring (8), dabber (2) outer fluke (4) bottom, seal (5) top is equipped with push ring (9).
2. An anchoring reliability locating seal according to claim 1, characterized in that sealing rings (10) are provided between the upper and lower ends of the inner wall of the sealing body (5) and the outer wall of the mandrel (2).
3. An anchored reliable positional sealing according to claim 2, characterised in that the sealing body (5) is provided with an annular groove (11) at the top in correspondence with the push ring (9).
4. An anchoring reliability locating seal according to claim 3, characterized in that the top of the sealing body (5) is a truncated cone structure with a narrow top and a wide bottom.
5. An anchored reliable positioning seal according to claim 4, characterized in that a connecting column (12) is provided between the upper tubular column (1) and the mandrel (2), the top of the connecting column (12) is provided with an upper threaded hole for connecting with the upper tubular column (1) and the bottom is provided with a lower threaded hole for connecting with the mandrel (2).
6. An anchoring reliability positioning seal according to claim 5, characterized in that the positioning step (3) has an inverted T-shaped configuration in longitudinal section.
7. An anchoring reliable positioning seal according to claim 6, characterized in that the sealing body (5) is provided with annular grooves (13) at the upper and lower ends of its outer wall for receiving the sealing rings (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221111801.1U CN217999526U (en) | 2022-05-11 | 2022-05-11 | Positioning seal reliable in anchoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221111801.1U CN217999526U (en) | 2022-05-11 | 2022-05-11 | Positioning seal reliable in anchoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217999526U true CN217999526U (en) | 2022-12-09 |
Family
ID=84292835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221111801.1U Active CN217999526U (en) | 2022-05-11 | 2022-05-11 | Positioning seal reliable in anchoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217999526U (en) |
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2022
- 2022-05-11 CN CN202221111801.1U patent/CN217999526U/en active Active
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