CN209875107U - Fish top protection device - Google Patents
Fish top protection device Download PDFInfo
- Publication number
- CN209875107U CN209875107U CN201922055830.5U CN201922055830U CN209875107U CN 209875107 U CN209875107 U CN 209875107U CN 201922055830 U CN201922055830 U CN 201922055830U CN 209875107 U CN209875107 U CN 209875107U
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- sheath
- sleeve
- oil
- protection device
- fish top
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Abstract
The utility model relates to a fish top protection device relates to the oil field with shutoff technical field in the pit, and it mainly comprises seal part and slip guide part, and sealing mechanism includes top connection, sheath, multilayer packing element and the spacer ring of coaxial setting, and direction sliding mechanism includes sleeve and level pressure ring. The sealing part is used for guaranteeing the sealing performance of the tool in the underground and preventing oil and water from leaking; the sliding guide part is used for positioning and extruding the rubber cylinder. The main use protects staying well instrument fish top, guarantees to stay the annular space leakproofness about well instrument fish top to when reaching the gas lift oil recovery, can guarantee to inject into gas and get into oil pipe through the gas lift valve completely. The packer can also be used for layered oil extraction, leakage finding, water blocking, oil testing and the like, is usually matched with a mechanical slip packer or a tubing anchor for use, and can also be used independently when the bottom of a well is used as a fulcrum.
Description
Technical Field
The utility model relates to an oil field is with plugging device in pit, concretely relates to fish top protection device.
Background
Along with the continuous development of the development level of an oil field, the oil exploitation technology is also continuously improved, not only are well completion modes and well body structures diversified, but also matched oil extraction, water injection and steam injection pipe columns and downhole tools thereof are various in names, in the process of oil field development, a downhole plugging tool is often required to be used for temporarily or permanently plugging oil, gas and water layers, in the production process of the oil field, a fish-top protector is required when the gas is used for lifting the well completion pipe column, when the production pipe column consisting of a sealing insertion pipe, a fish-top protector, a gas lift valve and the like is used, the pipe column is pressed down by 20 ~ 30 kN to the depth of a packer, a multistage sealing device of the sealing insertion pipe is effectively matched with a central pipe of the packer to realize sealing, and the traditional fish-top protector in the prior art is often poor in sealing performance, complicated in structure, inconvenient to operate and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, provide a fish top protection device, the technical scheme of its adoption as follows:
a fish top protection device, which comprises a sealing mechanism and a guiding sliding mechanism,
the sealing mechanism comprises an upper joint, a sheath, a plurality of layers of rubber cylinders and a spacer ring which are coaxially arranged, the upper joint is in threaded connection with the sheath, and the plurality of layers of rubber cylinders are arranged between the sheath and the spacer ring;
the guide sliding mechanism comprises a sleeve and a constant pressure ring, the sleeve is sleeved inside the sheath and coaxially arranged with the sheath, the constant pressure ring is arranged between the sheath and the sleeve and is in threaded connection with the inner wall of the sheath, the upper end of the sleeve is connected with the constant pressure ring through a pin, and the multilayer rubber sleeve is sleeved on the outer surface of the sleeve and is in threaded connection with the outer wall of the lower end of the sleeve through a spacer ring.
Preferably, the multilayer rubber cylinder comprises 3 rubber cylinders which are parallel to each other, and a middle spacer ring is arranged between every two adjacent rubber cylinders.
Preferably, the upper part of the sleeve is provided with a limiting step which is contacted with the end face of the top of the constant pressure ring.
Preferably, the initial outer diameter of the multilayer rubber cylinder is consistent with the outer diameter of the sheath.
Preferably, the spacer ring and the sleeve are also connected with an anti-rotation pin for preventing rotation.
Preferably, the lower extreme of sheath is equipped with the bearing step that extends to the axis direction, the setting ring sets up in the annular cavity that bearing step and spacing step formed.
The utility model has the advantages of as follows: simple easy-to-use is applicable to multiple oil well shutoff job site, and sealing performance is good, and the structure is simpler, and it is more convenient to use, and safe and reliable can be used to protect staying well instrument fish head, guarantees to stay annular space leakproofness about well instrument fish head to when reaching the gas lift oil recovery, can guarantee to inject into gaseous entering oil pipe through the gas lift valve completely. The packer can also be used for layered oil extraction, leakage finding, water blocking, oil testing and the like, is usually matched with a mechanical slip packer or a tubing anchor for use, and can also be used independently when the bottom of a well is used as a fulcrum.
Drawings
Fig. 1 is a schematic view of the semi-section structure of the present invention.
In the figure: 1. the device comprises an upper joint, 2, a sheath, 3, a sleeve, 4, a constant pressure ring, 5, a multi-layer rubber cylinder, 6, a pin, 7, an anti-rotation pin, 8, a spacer ring, 9, a limiting step, 10, a middle spacer ring, 11 and a bearing step.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example one
As shown in fig. 1, a fish top protection device comprises a sealing mechanism and a guide sliding mechanism.
The sealing mechanism comprises an upper joint 1, a jacket 2, a plurality of layers of rubber cylinders 5 and a spacer ring 8 which are coaxially arranged. The upper joint 1 is in threaded connection with the sheath 2, and the multilayer rubber cylinder 5 is arranged between the sheath 2 and the spacer ring 8. Can drive sheath 2 downstream and oppress multilayer packing element 5 through top connection 1 and realize that the packing element inflation comes sealed oil, sleeve pipe annular space, can protect staying well instrument fish head, guarantee to stay annular space leakproofness about well instrument fish head to when reaching the gas lift oil recovery, guarantee to inject into gas and get into oil pipe, safe and reliable through the gas lift valve completely.
The guide sliding mechanism comprises a sleeve 3 and a constant pressure ring 4, the sleeve 3 is sleeved in the sheath 2 and is coaxially arranged with the sheath 2, the constant pressure ring 4 is arranged between the sheath 2 and the sleeve 3 and is in threaded connection with the inner wall of the sheath 2, the upper end of the sleeve 3 is connected with the constant pressure ring 4 through a pin 6, and the multilayer rubber cylinder 5 is sleeved on the outer surface of the sleeve 3 and is in threaded connection with the outer wall of the lower end of the sleeve 3 through a spacer ring 8. Therefore, when the upper joint 1 drives the sheath 2 to move downwards, the pin 6 is firstly cut to separate the sheath 2 from the sleeve 3, and meanwhile, the sheath 2 slides along the outer surface of the sleeve 3, so that the multilayer rubber cylinder 5 is extruded to realize rubber cylinder expansion to seal an annular space of an oil pipe and a sleeve pipe. In addition, the matched part of the sleeve 3 and the constant pressure ring 4 is matched by a pin, so that the structure is simpler and the use is more convenient.
Example two
Further, multilayer packing element 5 includes 3 packing elements that are parallel to each other, is equipped with well spacer ring 10 between two adjacent packing elements, separates a plurality of packing elements through well spacer ring 10, can utilize a plurality of packing elements to realize multistage sealing effect on the one hand, can improve sealing performance, and on the other hand can be together fixed a plurality of packing elements, the installation of being convenient for.
In addition, the upper part of the sleeve 3 is provided with a limiting step 9 which is in contact with the top end face of the constant pressure ring 4, the lower end of the sheath 2 is provided with a bearing step 11 which extends towards the axis direction, and the constant pressure ring 4 is arranged in an annular cavity formed by the bearing step 11 and the limiting step 9, so that the installation is convenient, and the limiting effect can be achieved after the pin 6 is cut.
The initial outer diameter of the multilayer rubber sleeve 5 is consistent with the outer diameter of the sheath 2, so that the pipe column can be conveniently placed.
Still be connected with the rotation-proof pin 7 of preventing the pivoted at spacer ring 8 and sleeve 3, can effectively prevent to lead to the multilayer packing element 5 to drop because of spacer ring 8 rotates at the in-process of transferring through preventing changeing pin 7, safe and reliable.
In the field operation of oil gas field, the utility model discloses a fish top protection device's work progress does:
setting: after the fish top protector is lowered to the designed position of a shaft, a pipe column is lowered, the pin 6 between the sleeve 3 and the constant pressure ring 4 is cut off by the gravity of the oil pipe column, and thus the sheath 2 slides downwards along the sleeve 3 to extrude the multiple layers of rubber cylinders 5 and seal the annular space of the oil and the casing.
Deblocking: lift the oil pipe column, release packing element, multilayer packing element 5 resets, drives clamping ring 4 through bearing step 11 and spacing step 9 and drives sleeve 3 and move up simultaneously, can the deblocking play the utility model discloses.
The utility model discloses simple easy-to-use is applicable to multiple oil well shutoff job site, and sealing performance is good, and the structure is simpler, and it is more convenient to use, and safe and reliable. Can be used to protect staying well instrument fish top, guarantee to stay the annular space leakproofness about well instrument fish top to when reaching the gas lift oil recovery, can guarantee to inject into gas and get into oil pipe through the gas lift valve completely. The packer can also be used for layered oil extraction, leakage finding, water blocking, oil testing and the like, is usually matched with a mechanical slip packer or a tubing anchor for use, and can also be used independently when the bottom of a well is used as a fulcrum.
The present invention has been described above by way of example, but the present invention is not limited to the above-mentioned embodiments, and any modification or variation based on the present invention is within the scope of the present invention.
Claims (6)
1. The fish top protection device is characterized by comprising a sealing mechanism and a guiding sliding mechanism,
the sealing mechanism comprises an upper joint, a sheath, a plurality of layers of rubber cylinders and a spacer ring which are coaxially arranged, the upper joint is in threaded connection with the sheath, and the plurality of layers of rubber cylinders are arranged between the sheath and the spacer ring;
the guide sliding mechanism comprises a sleeve and a constant pressure ring, the sleeve is sleeved inside the sheath and coaxially arranged with the sheath, the constant pressure ring is arranged between the sheath and the sleeve and is in threaded connection with the inner wall of the sheath, the upper end of the sleeve is connected with the constant pressure ring through a pin, and the multilayer rubber sleeve is sleeved on the outer surface of the sleeve and is in threaded connection with the outer wall of the lower end of the sleeve through a spacer ring.
2. The fish top protection device of claim 1, wherein: the multilayer rubber cylinder comprises 3 rubber cylinders which are parallel to each other, and a middle spacer ring is arranged between every two adjacent rubber cylinders.
3. The fish top protection device according to claim 1 or 2, wherein: and the upper part of the sleeve is provided with a limiting step which is contacted with the end face of the top of the constant pressure ring.
4. The fish top protection device of claim 2, wherein: the initial outer diameter of the multilayer rubber cylinder is consistent with the outer diameter of the sheath.
5. The fish top protection device of claim 2, wherein: the spacer ring and the sleeve are also connected with an anti-rotation pin for preventing rotation.
6. The fish top protection device of claim 3, wherein: the lower extreme of sheath is equipped with the bearing step that extends to the axis direction, the setting ring sets up at the annular cavity that bearing step and spacing step formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922055830.5U CN209875107U (en) | 2019-11-26 | 2019-11-26 | Fish top protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922055830.5U CN209875107U (en) | 2019-11-26 | 2019-11-26 | Fish top protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209875107U true CN209875107U (en) | 2019-12-31 |
Family
ID=68949597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922055830.5U Active CN209875107U (en) | 2019-11-26 | 2019-11-26 | Fish top protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209875107U (en) |
-
2019
- 2019-11-26 CN CN201922055830.5U patent/CN209875107U/en active Active
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