CN212028553U - High-pressure sealing structure of water loss instrument - Google Patents
High-pressure sealing structure of water loss instrument Download PDFInfo
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- CN212028553U CN212028553U CN202020660322.XU CN202020660322U CN212028553U CN 212028553 U CN212028553 U CN 212028553U CN 202020660322 U CN202020660322 U CN 202020660322U CN 212028553 U CN212028553 U CN 212028553U
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Abstract
The utility model relates to a desiccation instrument high pressure seal structure belongs to desiccation instrument technical field, and the desiccation instrument includes: the screw thread compression bar, the screw thread pull rod and the end cover; the end cover is provided with a through hole into which the threaded pressure rod is inserted; a central shaft of the threaded pressure lever is provided with a connecting hole for connecting the threaded pull rod; the connecting hole comprises an upper cylindrical hole and a lower cylindrical hole which are coaxially connected; the inner diameter of the upper cylindrical hole is larger than that of the lower cylindrical hole; and the upper cylindrical hole and the lower cylindrical hole are communicated with each other; the inner diameter of the lower cylindrical hole is equal to the outer diameter of the threaded pull rod; the through hole comprises a cylindrical connecting hole with the inner diameter equal to the outer diameter of the threaded compression bar and a conical hole positioned at the bottom of the cylindrical connecting hole; a conical sealing block is arranged in the conical hole, and a clamping groove for clamping and connecting the end part of the threaded pull rod is formed in the sealing block; an annular groove connected with an O-shaped ring is formed in the outer wall of the threaded compression bar; the annular groove is positioned on the contact surface of the threaded pressure rod and the end cover; the threaded pull rod penetrates the upper cylindrical hole and the lower cylindrical hole from top to bottom in sequence and then is clamped with the sealing block.
Description
Technical Field
The utility model belongs to the technical field of the desiccation appearance, concretely relates to desiccation appearance high pressure seal structure.
Background
As is well known, in the long development process of the petroleum well cementation industry, an exclusive instrument for detecting oil well cement is updated and replaced by generations, and tends to be simplified more and more, in the well cementation process, the control of water loss in cement is important, the water loss of cement is large, free water permeates into a stratum when the cement is solidified, the volume of cement paste is reduced, and the well cementation quality is influenced; this effect is more pronounced especially in medium and high permeability formations. In addition, the water loss of the cement paste is too large, so that not only can serious pump-poor accidents occur in construction, but also when the cement paste passes through an oil-gas layer, a large amount of cement paste filtrate and cement particles enter the oil-gas layer to block an oil-gas channel to pollute the oil layer. Aiming at the problem, the high-temperature and high-pressure static water loss instrument and the overturning water loss instrument can simulate the underground high-temperature and high-pressure condition to detect the water loss amount of the cement.
In the cement water loss testing process, the aperture of a ventilating water loss hole of an end cover of a traditional water loss instrument is small, and the traditional water loss instrument is easily blocked by cement and is not easy to clean in the experiment process; the whole ventilating water loss valve is integrated, and after the valve needle at the bottom end is worn and abraded by long-term use, the part is scrapped and needs to be integrally replaced, so that the loss is increased, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the technical problem who exists among the known art, provide a desiccation appearance high pressure seal structure, can dismantle the part and wash after the desiccation valve of ventilating blocks up.
The utility model aims at providing a desiccator high pressure seal structure, desiccator includes: the screw thread compression bar (1), the screw thread pull rod (5) and the end cover (3); the end cover (3) is provided with a through hole into which the threaded compression bar (1) is inserted; a central shaft of the threaded compression bar (1) is provided with a connecting hole for connecting the threaded pull rod (5);
the connecting hole comprises an upper cylindrical hole and a lower cylindrical hole which are coaxially connected; the inner diameter of the upper cylindrical hole is larger than that of the lower cylindrical hole; and the upper cylindrical hole and the lower cylindrical hole are communicated with each other; the inner diameter of the lower cylindrical hole is equal to the outer diameter of the threaded pull rod (5);
the through hole comprises a cylindrical connecting hole with the inner diameter equal to the outer diameter of the threaded compression bar (1) and a conical hole positioned at the bottom of the cylindrical connecting hole; a conical sealing block (7) is arranged in the conical hole, and a clamping groove for clamping and connecting the end part of the threaded pull rod (5) is formed in the sealing block (7);
an annular groove connected with the O-shaped ring (2) is formed in the outer wall of the threaded compression bar (1); the annular groove is positioned on the contact surface of the threaded pressure rod (1) and the end cover (3);
the threaded pull rod (5) sequentially penetrates through the upper cylindrical hole and the lower cylindrical hole from top to bottom and then is clamped with the sealing block (7).
Furthermore, the number of the O-shaped rings (2) is not less than two.
Furthermore, the number of the O-shaped rings (2) is two.
Further, the sealing block (7) is connected with the threaded pressure rod (1) through threads.
The utility model has the advantages and positive effects that:
because the dehydration valve of ventilating of traditional technical scheme is whole integrative structure, the needle of bottom is worn and torn the back through long-term use, and this part is just scrapped, needs whole change, through adopting above-mentioned technical scheme, can dismantle the part after the dehydration valve of ventilating blocks up and wash, consequently can very big resources are saved.
Drawings
FIG. 1 is an axial cross-sectional view of a preferred embodiment of the invention;
wherein: 1. a threaded compression bar; 2. an O-shaped ring; 3. an end cap; 4. aligning the wrench positions; 5. a threaded pull rod; 6. a water loss hole; 7. and (6) sealing the block.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
as shown in fig. 1, the technical solution of the present invention is:
a high-pressure sealing structure of a water loss instrument comprises: the device comprises a threaded compression bar 1, an O-shaped ring 2, an end cover 3, a threaded pull rod 5 and a sealing block 7; wherein:
the end cover 3 is provided with a through hole into which the threaded compression bar 1 is inserted; a central shaft of the threaded compression bar 1 is provided with a connecting hole for connecting the threaded pull rod 5; the bottom of the end cover 3 is provided with a water leakage hole 6; the caliber of the traditional dehydration hole 6 is less than 2.5mm, and the caliber of the dehydration hole 6 in the preferred embodiment is 2.5 mm;
the connecting hole comprises an upper cylindrical hole and a lower cylindrical hole which are coaxially connected; the inner diameter of the upper cylindrical hole is larger than that of the lower cylindrical hole; and the upper cylindrical hole and the lower cylindrical hole are communicated with each other; the inner diameter of the lower cylindrical hole is equal to the outer diameter of the threaded pull rod 5;
the through hole comprises a cylindrical connecting hole with the inner diameter equal to the outer diameter of the threaded compression bar 1 and a conical hole positioned at the bottom of the cylindrical connecting hole; a conical sealing block 7 is arranged in the conical hole, and a clamping groove for clamping and connecting the end part of the threaded pull rod 5 is formed in the sealing block 7; the outer wall of the threaded compression bar 1 is provided with an opposite flat wrench position 4;
an annular groove connected with the O-shaped ring 2 is formed in the outer wall of the threaded compression bar 1; the annular groove is positioned on the contact surface of the threaded pressure rod 1 and the end cover 3;
the threaded pull rod 5 sequentially penetrates through the upper cylindrical hole and the lower cylindrical hole from top to bottom and then is clamped with the sealing block 7.
In the preferred embodiment described above:
the inside of screw thread depression bar 1 is the different cavity structure in upper and lower aperture, during the use, inserts screw thread pull rod 5 from the upper end of screw thread depression bar 1, and screw thread pull rod 5's size cooperation screw thread depression bar 1's inner structure design can make screw thread pull rod 5 block inside screw thread depression bar 1. The other part of the lower end of the threaded pull rod 5 is provided with external threads and is connected with the internal threads of the sealing block 7. Then a plurality of (preferably two) O-shaped rings 2 are arranged in two grooves at the lower end of the threaded compression bar 1, then the arranged whole is connected and arranged with the end cover 3, and finally the threaded compression bar 1 is screwed by a spanner.
When the threaded compression bar 1 is rotated clockwise 1, the threaded compression bar 1 is tightly contacted with the sealing block 7 and is pressed downwards, so that the conical surface at the lower end of the sealing block 7 is tightly attached to the through hole at the lower end of the end cover 3, and a sealing effect is achieved;
when the threaded pressure rod 1 is rotated anticlockwise, the part, matched with the threaded pull rod 5, inside the threaded pressure rod 1 is in close contact with the part, upward force is generated, the sealing block 7 is lifted, the conical surface of the sealing block is separated from the through hole at the lower end of the end cover 3, and a conduction effect is achieved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (4)
1. A water loss instrument high pressure seal structure, the water loss instrument includes: the screw thread compression bar (1), the screw thread pull rod (5) and the end cover (3); the end cover (3) is provided with a through hole into which the threaded compression bar (1) is inserted; a central shaft of the threaded compression bar (1) is provided with a connecting hole for connecting the threaded pull rod (5); the method is characterized in that:
the connecting hole comprises an upper cylindrical hole and a lower cylindrical hole which are coaxially connected; the inner diameter of the upper cylindrical hole is larger than that of the lower cylindrical hole; and the upper cylindrical hole and the lower cylindrical hole are communicated with each other; the inner diameter of the lower cylindrical hole is equal to the outer diameter of the threaded pull rod (5);
the through hole comprises a cylindrical connecting hole with the inner diameter equal to the outer diameter of the threaded compression bar (1) and a conical hole positioned at the bottom of the cylindrical connecting hole; a conical sealing block (7) is arranged in the conical hole, and a clamping groove for clamping and connecting the end part of the threaded pull rod (5) is formed in the sealing block (7);
an annular groove connected with the O-shaped ring (2) is formed in the outer wall of the threaded compression bar (1); the annular groove is positioned on the contact surface of the threaded pressure rod (1) and the end cover (3);
the threaded pull rod (5) sequentially penetrates through the upper cylindrical hole and the lower cylindrical hole from top to bottom and then is clamped with the sealing block (7).
2. The high-pressure sealing structure of the water loss instrument of claim 1, wherein the number of the O-rings (2) is not less than two.
3. The high-pressure sealing structure of the water loss instrument of claim 2, wherein the number of the O-rings (2) is two.
4. The high-pressure sealing structure of the water loss instrument of any one of claims 1 to 3, wherein the sealing block (7) and the threaded pressure rod (1) are connected through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020660322.XU CN212028553U (en) | 2020-04-27 | 2020-04-27 | High-pressure sealing structure of water loss instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020660322.XU CN212028553U (en) | 2020-04-27 | 2020-04-27 | High-pressure sealing structure of water loss instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212028553U true CN212028553U (en) | 2020-11-27 |
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ID=73495794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020660322.XU Active CN212028553U (en) | 2020-04-27 | 2020-04-27 | High-pressure sealing structure of water loss instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212028553U (en) |
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2020
- 2020-04-27 CN CN202020660322.XU patent/CN212028553U/en active Active
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