CN216621697U - Vertical shaft section gel slug leaking stoppage detection device - Google Patents
Vertical shaft section gel slug leaking stoppage detection device Download PDFInfo
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- CN216621697U CN216621697U CN202122097086.2U CN202122097086U CN216621697U CN 216621697 U CN216621697 U CN 216621697U CN 202122097086 U CN202122097086 U CN 202122097086U CN 216621697 U CN216621697 U CN 216621697U
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Abstract
The utility model discloses a gel slug plugging detection device for a vertical shaft section, which comprises an oven, wherein the left side of the oven is respectively provided with an air compressor and a submersible driving pump, the right side of the oven is respectively provided with a confining pressure pump, a back pressure pump and a measuring cylinder, a kettle body, a rock core holder and a back pressure valve are sequentially arranged in the oven, the top of the kettle body is provided with a kettle body inlet end, the upper half part of the interior of the kettle body is provided with a displacement medium, and the lower half part of the interior of the kettle body is provided with a gel slug. Compared with a rock core dynamic damage instrument, the device is simpler, more convenient and lighter, an oven is heated to simulate the underground temperature, a displacement pump is used for pressurizing to simulate the liquid column pressure of the rock core, a back pressure valve is used for simulating the bottom hole flowing pressure, an inlet pressure gauge of the device is connected with an inlet section of the kettle body to directly evaluate the bearing capacity of the slug, an outlet section of the kettle body is connected by a thick pipeline, and the additional resistance caused by the excessively thin pipeline is avoided.
Description
Technical Field
The utility model belongs to the technical field of plugging of shafts of oil and gas wells, and particularly relates to a gel slug plugging detection device for a straight well section.
Background
The gel is widely applied to operations such as well drilling and completion, well killing, well repair and the like as a chemical temporary isolation plug. The gel plug plugging is that non-Newtonian plant gum fluid with temperature resistance, pressure resistance, enough viscosity and toughness is injected into a shaft, temporary jelly-shaped plugging is formed at the artificial crack seam of the original production layer of the shaft, and the liquid column pressure of the plug is used for balancing the formation pressure while external fluid is effectively prevented from entering the original production layer. But the testing arrangement to the temporary plugging or pressure-bearing effect of gel slug is less at present, and the current commonly used like rock core developments harm appearance mainly evaluates to the working solution, and the device is too heavy, and the ageing of gel is very inconvenient, and the cost is expensive moreover, urgently needs a convenient, accurate, high performance price ratio gel slug leaking stoppage effect evaluation device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a gel slug plugging detection device for a straight well section, which aims at gel slug temporary plugging operation in the processes of well completion, well killing and well repair of the straight well section.
In order to achieve the design purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a vertical shaft section gel slug leaking stoppage detection device, includes the oven, the oven left side is equipped with air compressor respectively and drives the submerged pump, the oven right side is equipped with respectively encloses pressure pump, back-pressure pump and graduated flask, be equipped with the cauldron body, rock core holder and back-pressure valve in the oven in proper order, cauldron body top is equipped with cauldron body entry end, the first inside of the cauldron body is equipped with displacement medium, the inside lower half of the cauldron body is equipped with the gel slug, be equipped with cauldron body exit end on the bottom outer wall of the cauldron body, be equipped with the valve on the cauldron body exit end, the left end and the top of rock core holder are equipped with entry end I and entry end II respectively, and the right-hand member of rock core holder is equipped with the exit end, the left end and the top of back-pressure valve are equipped with input port I and output port II respectively, the right-hand member of back-pressure valve is equipped with output port.
The output port of the air compressor is fixedly connected with the input port of the submersible drive pump through a pipeline, the output port of the submersible drive pump is fixedly connected with the inlet end of the kettle body at the top of the kettle body in the oven through a pipeline, the kettle body outlet end on the outer wall of the bottom end of the kettle body is fixedly connected with the inlet end I at the left end of the rock core holder in the oven through a thick pipeline, an inlet end II at the top of the core holder is fixedly connected with an output port of a confining pressure pump at the right side of the oven through a pipeline, the outlet end at the right end of the rock core holder is fixedly connected with the input port I at the left end of the back pressure valve in the oven through a pipeline, an output port II at the top of the back pressure valve is fixedly connected with the outlet end of the back pressure pump at the right side of the oven through a pipeline, and the output port at the right end of the back-pressure valve is fixedly connected with the input end of the measuring cylinder at the right side of the box body through a pipeline.
And an inlet pressure gauge is arranged on a pipeline between the output port of the submersible driving pump and the inlet end of the kettle body at the top of the accessory.
And a confining pressure gauge is arranged on a pipeline between the top inlet end II of the rock core holder and the output port of the confining pressure pump.
And a back pressure gauge is arranged on a pipeline between the back pressure valve top output port II and the output port of the back pressure pump.
And an electronic balance is arranged at the bottom end of the measuring cylinder.
The inner diameter of the coarse pipeline is more than 0.6cm and is connected with the outlet end of the kettle body by screw threads
The utility model has the beneficial effects that: the electronic balance arranged at the bottom of the measuring cylinder can measure and input the electronic equipment in real time; the device mainly evaluates the bearing and leaking stoppage effects of the gel slug, the displacement medium can be directly clear water, and if on-site working fluid is adopted for displacement, an intermediate container can be added between the displacement pump and the kettle body; the switching valve that I of cauldron body bottom set up is controlled, for avoiding the inaccurate problem of data that too big capillary resistance brought, cauldron body exit end is connected by thick pipeline, the device is different from conventional rock core displacement experiment, conventional rock core displacement experiment manometer links to each other with the entry and the export of rock core holder usually, and this experiment manometer links to each other with cauldron body entry, do not set up the export manometer, set up the back pressure valve, simulation pit shaft liquid column pressure and formation pressure difference, the graduated flask lower extreme is electronic balance, can measure and input electronic equipment in real time, the device mainly evaluates the pressure-bearing and the leaking stoppage effect of gel slug, the displacement medium can directly adopt the clear water, if will adopt on-the-site working fluid to displace, can add an intermediate container between displacement pump and cauldron body, the electronic balance that the graduated flask lower extreme set up, can measure and input electronic equipment in real time. Compared with a rock core dynamic damage instrument, the device is simpler, more convenient and lighter, an oven is heated to simulate the underground temperature, a displacement pump is used for pressurizing to simulate the liquid column pressure of the rock core, a back pressure valve is used for simulating the bottom hole flowing pressure, an inlet pressure gauge of the device is connected with an inlet section of the kettle body to directly evaluate the bearing capacity of the slug, an outlet section of the kettle body is connected by a thick pipeline, and the additional resistance caused by the excessively thin pipeline is avoided.
Drawings
FIG. 1 is a schematic view of a gel slug plugging detection device for a vertical well section according to the present invention.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. As shown in fig. 1: a gel slug plugging detection device for a vertical shaft section comprises an oven 1, wherein an air compressor 2 and a submersible drive pump 3 are respectively arranged on the left side of the oven 1, the right side of the oven 1 is respectively provided with a confining pressure pump 4, a back pressure pump 5 and a measuring cylinder 6, a kettle body 7, a rock core holder 8 and a back pressure valve 9 are sequentially arranged in the oven 1, the top of the kettle body 7 is provided with a kettle body inlet end 10, the upper half part inside the kettle body 7 is provided with a displacement medium 11, the lower half part of the interior of the kettle body 7 is provided with a gel slug 12, the outer wall of the bottom end of the kettle body 7 is provided with a kettle body outlet end 13, a valve 14 is arranged on the outlet end 13 of the kettle body, an inlet end I and an inlet end II are respectively arranged at the left end and the top of the core holder 8, an outlet end is arranged at the right end of the core holder 8, the left end and the top of back pressure valve 9 are equipped with input port I and output port II respectively, the right-hand member of back pressure valve 9 is equipped with output port.
The output port of the air compressor 2 is fixedly connected with the input port of the submersible driving pump 3 through a pipeline, the output port of the submersible driving pump 3 is fixedly connected with the kettle body inlet end 10 at the top of the kettle body 7 in the oven 1 through a pipeline, a kettle body outlet end 13 on the outer wall of the bottom end of the kettle body 7 is fixedly connected with an inlet end I at the left end of the rock core holder 8 in the oven 1 through a thick pipeline, the inlet end II at the top of the core holder 8 is fixedly connected with the output port of the confining pressure pump 4 at the right side of the oven 1 through a pipeline, the outlet end at the right end of the rock core holder 8 is fixedly connected with the input port I at the left end of the back pressure valve 9 in the oven 1 through a pipeline, an output port II at the top of the back pressure valve 9 is fixedly connected with the outlet end of the back pressure pump 5 at the right side of the oven 1 through a pipeline, and an output port at the right end of the back pressure valve 9 is fixedly connected with an input end of the measuring cylinder 6 at the right side of the box body 1 through a pipeline.
And an inlet pressure gauge 15 is arranged on a pipeline between the output port of the submersible driving pump 3 and the kettle body inlet end 10 at the top of the kettle body 7.
And a confining pressure gauge 16 is arranged on a pipeline between the top inlet end II of the core holder 8 and the output port of the confining pressure pump 4.
And a back pressure gauge 17 is arranged on a pipeline between the output port II at the top of the back pressure valve 9 and the output port of the back pressure pump 5.
The bottom end of the measuring cylinder 6 is provided with an electronic balance 18.
The inner diameter of the coarse pipeline is more than 0.6cm, and the coarse pipeline is connected with the outlet end 13 of the kettle body by screw threads.
Before the experiment begins, a certain amount of gel slug 12 is poured into the kettle body 7, the inlet end 10 of the kettle body is sealed, the valve 14 is closed, the outlet end 13 of the kettle body is sealed, the kettle body is placed in the oven 1 for aging, the aging temperature can be set as the target formation temperature, the step simulates the waiting coagulation operation in site construction, after the gel is formed, the displacement medium 11 can be directly poured into the kettle body 7 to fill the kettle body 7, the valve 14 is opened, the air compressor 2 and the displacement pump 3 directly drive the displacement medium 11 to enter the inlet end 10 of the kettle body, the gel slug 12 is pressurized and is input into the core holder 8 along the outlet end 13 of the kettle body, and finally the gel slug flows into the measuring cylinder 6 through the back pressure valve 9, and the plugging effect of the gel slug in the straight well section can be evaluated through the processes.
Claims (7)
1. The utility model provides a vertical shaft section gel slug leaking stoppage detection device which characterized in that: the drying oven comprises a drying oven, the drying oven left side is equipped with air compressor respectively and drives the submerged pump, the drying oven right side is equipped with enclosing pressure pump, back pressure pump and graduated flask respectively, be equipped with the cauldron body, rock core holder and back pressure valve in the drying oven in proper order, cauldron body top is equipped with cauldron body entry end, the first inside of the cauldron body is equipped with the displacement medium, the inside lower half of the cauldron body is equipped with the gel slug, be equipped with cauldron body exit end on the bottom outer wall of the cauldron body, be equipped with the valve on the cauldron body exit end, the left end and the top of rock core holder are equipped with entry end I and entry end II respectively, and the right-hand member of rock core holder is equipped with the exit end, the left end and the top of back pressure valve are equipped with input port I and output port II respectively, the right-hand member of back pressure valve is equipped with output port.
2. The gel slug plugging detection device for the vertical shaft section as claimed in claim 1, which is characterized in that: the output port of the air compressor is fixedly connected with the input port of the submersible drive pump through a pipeline, the output port of the submersible drive pump is fixedly connected with the inlet end of the kettle body at the top of the kettle body in the oven through a pipeline, the kettle body outlet end on the outer wall of the bottom end of the kettle body is fixedly connected with the inlet end I at the left end of the rock core holder in the oven through a thick pipeline, an inlet end II at the top of the core holder is fixedly connected with an output port of a confining pressure pump at the right side of the oven through a pipeline, the outlet end at the right end of the rock core holder is fixedly connected with the input port I at the left end of the back pressure valve in the oven through a pipeline, an output port II at the top of the back pressure valve is fixedly connected with the outlet end of the back pressure pump at the right side of the oven through a pipeline, and an output port at the right end of the back pressure valve is fixedly connected with the input end of the measuring cylinder at the right side of the oven through a pipeline.
3. The gel slug plugging detection device for the vertical shaft section as claimed in claim 1, which is characterized in that: and an inlet pressure gauge is arranged on a pipeline between the output port of the submersible driving pump and the inlet end of the kettle body at the top of the accessory.
4. The gel slug plugging detection device for the vertical shaft section as claimed in claim 1, which is characterized in that: and a confining pressure gauge is arranged on a pipeline between the top inlet end II of the rock core holder and the output port of the confining pressure pump.
5. The gel slug plugging detection device for the vertical shaft section according to claim 1, characterized in that: and a back pressure gauge is arranged on a pipeline between the back pressure valve top output port II and the output port of the back pressure pump 5.
6. The vertical shaft section gel slug plugging detection device according to claim 1, characterized in that: and an electronic balance is arranged at the bottom end of the measuring cylinder.
7. The gel slug plugging detection device for the vertical shaft section according to claim 2, characterized in that: the inner diameter of the coarse pipeline is larger than 0.6cm, and the coarse pipeline is connected with the outlet end (13) of the kettle body through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122097086.2U CN216621697U (en) | 2021-09-01 | 2021-09-01 | Vertical shaft section gel slug leaking stoppage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122097086.2U CN216621697U (en) | 2021-09-01 | 2021-09-01 | Vertical shaft section gel slug leaking stoppage detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216621697U true CN216621697U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122097086.2U Active CN216621697U (en) | 2021-09-01 | 2021-09-01 | Vertical shaft section gel slug leaking stoppage detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216621697U (en) |
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2021
- 2021-09-01 CN CN202122097086.2U patent/CN216621697U/en active Active
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