CN217813435U - Sanitary installation device of sensor on downhole tool - Google Patents
Sanitary installation device of sensor on downhole tool Download PDFInfo
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- CN217813435U CN217813435U CN202221745660.9U CN202221745660U CN217813435U CN 217813435 U CN217813435 U CN 217813435U CN 202221745660 U CN202221745660 U CN 202221745660U CN 217813435 U CN217813435 U CN 217813435U
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Abstract
The invention discloses a sanitary installation device of a sensor on a downhole tool, which comprises: the outer cylinder is of a cylindrical structure, and an accommodating cavity is formed inside the outer cylinder; a side wall hole provided in the outer cylinder; a mandrel disposed inside the receiving cavity; a piston disposed axially between the outer barrel and the mandrel; one end of the adapter is communicated with the outer cylinder; one end of the air chamber outer cylinder is communicated with the other end of the adapter; a sensor provided inside the air chamber outer cylinder; the pressure transmission channel is arranged on the conversion joint along the axial direction; an annular sealing space is formed among the outer barrel, the mandrel and the conversion joint, silicone oil is injected into the annular sealing space, one end of the pressure channel is communicated with the annular sealing space, and the other end of the pressure channel is communicated with the sensor. The sensor is arranged in the air chamber outer barrel, and is matched with the pressure transmission channel through annular sealing space oil injection, so that the sensor is guaranteed to receive effective instructions.
Description
Technical Field
The invention relates to a sanitary installation device of a sensor on a downhole tool, and belongs to the field of formation testing tools.
Background
Formation testing is a way of testing oil, and is characterized in that during drilling or after casing completion, a drilling rod or related testing tools (testing valves, packers and pressure gauges) are lowered to a position to be tested in a well, the testing valves are opened or closed through surface operation, a target layer is tested, a relation curve of downhole pressure along with time change is obtained, a produced sample of the testing layer is obtained, various parameters of the formation and fluid under dynamic conditions are obtained through analyzing and processing the curve and the sample, and the reservoir stratum is evaluated.
There are more and more sensors in use on current downhole tools. One is an electronic pressure gauge for measuring downhole annular or drift pressure, which is used in large quantities and has been used for many years. The cost of such electronic pressure gauges is very high.
And another electromechanically bonded product. On the oil testing tool, because the using environment of the downhole tool is complex and the conditions are harsh, a full-mechanical mechanism is always adopted, and the general operation mode is the ground pressurization operation or the lifting and lowering operation. Relatively speaking, ground pressurization is relatively easy to implement. In recent years, with the development of technology and the need of oil testing technology, electronic products are introduced into downhole testing tools, but the operation mode is still a ground pressurization mode, so that a method for converting a pressurization signal of the ground into a certain signal language and then operating the downhole tools on the ground is needed. The pressure signals applied to the surface need to be identified downhole and need to be provided with sensors. The liquid used for transmitting pressure in the annulus is sometimes water and sometimes mud, and the mud is easy to precipitate when the annulus is static, so that a channel leading to the sensor is easy to block, the pressure cannot be effectively transmitted, the tool cannot normally operate, and the test fails.
Disclosure of Invention
The invention designs and develops a sanitary installation device of a sensor on a downhole tool, the sensor is arranged in an air chamber outer cylinder, and the annular sealing space is filled with oil and matched with a pressure transmission channel, so that the sensor can be ensured to receive effective instructions, and the pressure transmission precision and the working efficiency are improved.
The technical scheme provided by the invention is as follows:
a sanitary installation unit for a sensor on a downhole tool, comprising:
the outer cylinder is of a cylindrical structure, and an accommodating cavity is formed inside the outer cylinder;
a side wall hole provided in the outer cylinder;
a mandrel disposed inside the receiving cavity;
a piston disposed axially between the outer barrel and the mandrel;
one end of the adapter is communicated with the outer cylinder;
one end of the air chamber outer cylinder is communicated with the other end of the adapter;
a sensor provided inside the air chamber outer cylinder;
the pressure transmission channel is arranged on the conversion joint along the axial direction;
an annular sealing space is formed among the outer barrel, the mandrel and the conversion joint, silicone oil is injected into the annular sealing space, one end of the pressure transmission channel is communicated with the annular sealing space, and the other end of the pressure transmission channel is communicated with the sensor.
Preferably, the method further comprises:
the outer friction ring is arranged on the inner wall of the outer cylinder and is close to one end of the piston;
the inner wiping ring is arranged on the outer wall of the mandrel, and the inner wiping ring and the outer wiping ring are arranged oppositely.
Preferably, the method further comprises the following steps:
and the oil filling hole is formed in the conversion joint and communicated with the pressure transmission channel.
Preferably, the method further comprises the following steps:
and the sealing plug is arranged in the oil filling hole in a matching manner.
Preferably, the method further comprises the following steps:
and one end of the lower joint is connected with the other end of the air outer cylinder.
Preferably, the piston, the spindle, the crossover joint, the air chamber outer cylinder, and the lower joint are all cylindrical structures.
The invention has the following beneficial effects:
the utility model provides a sanitary installation device of sensor on downhole tool can provide the clean sanitary annular pressure passageway of test for the sensor, guarantees that the sensor can accept effectual instruction always, and the protection sensor does not receive the damage, prolongs the life of sensor, and this kind of structure can not receive the restriction of the clean degree of medium when selecting the sensor, and the sensor kind that can select is very many
The structure of the parts seems to be complex, but in practice, the structure of the downhole tool is many, and the structure of the patent is generally only added to other structures, so that the realization is easy, and the cost is reduced.
The structure has low requirements on the sensor, so that when the sensor is selected, the requirement is not too much, and the cost is reduced by changing the direction.
The sensor life is also increased because the sensor does not contact the mud in the annulus, dirty fluids that tend to settle and clog the channels.
Therefore, the mode of transmitting pressure to the pressure sensor can not cause the blockage of a pressure transmission channel, the reliable measurement pressure of the sensor is determined, and the working reliability caused by the subsequent pressure measurement is higher.
The device is used on the full-drift-diameter underground tool, and through multiple underground tests, the test effect is good, the sensor works reliably, and safe and reliable test conditions are provided for the tool with working conditions due to pressure measurement.
Drawings
Fig. 1 is a schematic structural view of a sanitary installation device for a sensor on a downhole tool according to the present invention.
Fig. 2 is a partial enlarged view of the outer wiping ring and the inner wiping ring of the invention.
Fig. 3 is a partial enlarged view of the sensor according to the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in fig. 1-3, the present invention provides a sanitary installation device for a sensor on a downhole tool, comprising: the device comprises an outer cylinder 1, a piston 2, a mandrel 3, a conversion joint 4, an air chamber outer cylinder 5, a sensor 6, a lower joint 7, an outer friction ring 8, an inner friction ring 9, a first O-shaped ring 10, a second O-shaped ring 11, a third O-shaped ring 14, a fourth O-shaped ring 15, a fifth O-shaped ring 18, a sixth O-shaped ring 20, a seventh O-shaped ring 22, an eighth O-shaped ring 25, a first supporting seal 12, a second supporting seal 13, a third supporting seal 16, a fourth supporting seal 17, a fifth supporting seal 19, a sixth supporting seal 21 and a seventh supporting seal 23.
The outer cylinder 1 is arranged at one end of the sanitary installation device, the mandrel 3 is arranged in the outer cylinder 1, the piston 2 is further arranged between the outer cylinder 1 and the mandrel 3, one end of the adapter 4 is communicated with the outer cylinder 1, the other end of the adapter is communicated with one end of the air chamber outer cylinder 5, and the other end of the air chamber outer cylinder 5 is connected with the lower connector 7.
The outer cylinder 1 is of a cylindrical structure, a containing cavity is arranged inside the outer cylinder 1, a side wall hole is formed in the wall of the outer cylinder 3, the mandrel 3 is arranged in the containing cavity of the outer cylinder 1, and the piston 2 is further arranged between the outer cylinder 1 and the mandrel 3, wherein the mandrel 3 and the piston 2 are both of a cylindrical structure.
An outer wiping ring 8 is arranged on the inner wall of the outer barrel 1, one end of the outer wiping ring 8 is close to the piston, an inner wiping ring 9 is arranged on the outer wall of the mandrel 3 and is opposite to the outer wiping ring 8, the outer wiping ring 8 and the inner wiping ring 9 are located in the same plane, the piston 2 can pass through the space between the outer wiping ring 8 and the inner wiping ring 9, and dirt on the outer barrel 1 and the mandrel 3 is removed through the outer wiping ring 8 and the inner wiping ring 9 when the piston 2 moves up and down.
The outer cylinder 1, the piston 2, the mandrel 3, the adapter 4, and the first O-ring 10, the second O-ring 11, the third O-ring 14, and the fourth O-ring 15 disposed around the above components form an annular sealing space for injecting silicone oil.
One end of the conversion joint 4 is communicated with the outer cylinder 1, the other end is communicated with one end of the air chamber outer cylinder 5, a pressure transmission channel is arranged on the conversion joint 4 along the axial direction, and an oil filling hole is also arranged on the conversion joint 4 and is communicated with the pressure transmission channel. And a sealing plug 24 and a sealing ring 25 are arranged in the orifice in a matching manner and used for sealing the pressure of the silicon oil and the subsequent silicon oil, the sensor 6 is arranged in the conversion joint 4 and is positioned in a sealed air cavity formed by the conversion joint 4, the air chamber outer cylinder, the lower joint, and the fifth O-shaped sealing ring 18, the sixth O-shaped sealing ring 20 and the seventh O-shaped sealing ring 22 which are arranged at the periphery, and other components such as a circuit board battery and the like are also arranged in the air cavity and used for recording the pressure collected by the sensor 6.
Wherein the first support seal 12, the second support seal 13, the third support seal 16, the fourth support seal 17, the fifth support seal 19, the sixth support seal 21, and the seventh support seal 23 are used in conjunction with the auxiliary first O-ring 10, the second O-ring 11, the third O-ring 14, the fourth O-ring 15, the fifth O-ring 18, the sixth O-ring 20, the seventh O-ring 22, and the eighth O-ring 25.
In the pit, annular pressure gets into from the lateral wall hole of urceolus 1, and pressure promotes piston 2, because silicon oil is incompressible, annular pressure will pass through piston 2 like this, silicon oil and pass on the crossover sub 4 and pass on the pressure passageway transmits the sensor, and the sensor just can receive pressure signal under clean environment like this. The lifetime of the sensor 6 is also increased because the sensor 6 is not exposed to mud in the annulus, dirty fluids that tend to settle and block the passage. Therefore, the pressure transmission mode for the pressure sensor can not cause the blockage of the pressure transmission channel, the reliable measurement pressure of the sensor is determined, and the working reliability caused by the subsequent pressure measurement is higher
While embodiments of the invention have been described above, it is not intended to be limited to the details shown, described and illustrated herein, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed, and to such extent that such modifications are readily available to those skilled in the art, and it is not intended to be limited to the details shown and described herein without departing from the general concept as defined by the appended claims and their equivalents.
Claims (6)
1. A sanitary mounting arrangement for a sensor on a downhole tool, comprising:
the outer cylinder is of a cylindrical structure, and an accommodating cavity is formed inside the outer cylinder;
a side wall hole provided in the outer cylinder;
a mandrel disposed inside the receiving cavity;
a piston disposed axially between the outer barrel and the mandrel;
one end of the adapter is communicated with the outer cylinder;
one end of the air chamber outer cylinder is communicated with the other end of the adapter;
one end of the lower joint is connected with the other end of the air outer cylinder;
a sensor provided inside the air chamber outer cylinder;
the pressure transmission channel is arranged on the conversion joint along the axial direction;
an annular sealing space is formed among the outer barrel, the mandrel and the conversion joint, silicone oil is injected into the annular sealing space, one end of the pressure transmission channel is communicated with the annular sealing space, and the other end of the pressure transmission channel is communicated with the sensor.
2. The sanitary installation unit for a sensor on a downhole tool of claim 1, further comprising:
the outer friction ring is arranged on the inner wall of the outer cylinder and is close to one end of the piston;
the inner friction ring is arranged on the outer wall of the mandrel and is opposite to the outer friction ring.
3. The sanitary installation unit of a sensor on a downhole tool of claim 2, further comprising:
and the oil filling hole is formed in the conversion joint and communicated with the pressure transmission channel.
4. The sanitary installation unit of a sensor on a downhole tool of claim 3, further comprising:
and the sealing plug is arranged in the oil filling hole in a matching manner.
5. The sanitary installation unit for a sensor on a downhole tool as claimed in claim 4, wherein a sealing ring is further provided between the oil injection hole and the sealing plug.
6. The sanitary installation unit of a sensor on a downhole tool of claim 5, wherein the piston, the mandrel, the crossover sub, the air chamber outer barrel, and the lower sub are all cylindrical structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221745660.9U CN217813435U (en) | 2022-07-08 | 2022-07-08 | Sanitary installation device of sensor on downhole tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221745660.9U CN217813435U (en) | 2022-07-08 | 2022-07-08 | Sanitary installation device of sensor on downhole tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217813435U true CN217813435U (en) | 2022-11-15 |
Family
ID=83962655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221745660.9U Active CN217813435U (en) | 2022-07-08 | 2022-07-08 | Sanitary installation device of sensor on downhole tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217813435U (en) |
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2022
- 2022-07-08 CN CN202221745660.9U patent/CN217813435U/en active Active
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