CN215804489U - Reverse gravel filling device - Google Patents
Reverse gravel filling device Download PDFInfo
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- CN215804489U CN215804489U CN202122368338.0U CN202122368338U CN215804489U CN 215804489 U CN215804489 U CN 215804489U CN 202122368338 U CN202122368338 U CN 202122368338U CN 215804489 U CN215804489 U CN 215804489U
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Abstract
The utility model discloses a reverse gravel filling device, which relates to the technical field of ground immersion drilling and comprises a gravel throwing tank, a water pool, a first pipeline and a second pipeline, wherein a liquid inlet is formed in the bottom of the gravel throwing tank, the water pool is communicated with the liquid inlet through the first pipeline, a power structure is arranged on the first pipeline, one end of the second pipeline is communicated with the first pipeline, the other end of the second pipeline is communicated with a well, a liquid outlet is formed in the top of the gravel throwing tank, the liquid outlet is communicated with the second pipeline, and a filling port is formed in the gravel throwing tank and used for filling gravel into the gravel throwing tank. The utility model can realize multiple functions of flushing, gravel throwing, intermittent gravel throwing, small-flow gravel throwing and the like, and improves the controllability and the success rate of the reverse gravel filling process in the secondary well-completion process.
Description
Technical Field
The utility model relates to the technical field of ground immersion drilling, in particular to a reverse gravel filling device.
Background
The quality and efficiency of the influence ground immersion drilling hole are mainly two aspects: drilling equipment and process techniques. In the conventional immersion drilling, a drilling machine is adopted to complete all the procedures from open hole drilling to well completion, the drilling machine, a drilling tool and a slurry pump play a role in determining the drilling speed in the drilling process, and the drilling machine is selected according to the drilling depth and the load. In the ultra-deep ground immersion drilling engineering, in order to improve the efficiency and the drilling quality, new process technologies such as reverse grouting, reverse gravel filling and the like are introduced. However, the connection between these process technologies requires a lot of auxiliary time, such as the setting time of cement paste. Meanwhile, the requirements on the power of the drilling machine and the mud pump at different stages are different, and the power is easily wasted by using the same drilling machine and the same mud pump in the whole process. In order to solve these problems, a method for improving the drilling efficiency of the land leaching mountain from the process flow and technical improvement is proposed: and (5) performing a secondary well completion process. The secondary well completion process splits the traditional ground immersion drilling project into three independent processes: drilling engineering, well construction engineering and hole washing engineering are combined with requirements of different technological processes, and the types of drilling machines, mud pumps, mud types and the like are optimized. The secondary well-completion process technology is characterized in that the original in-situ leaching well drilling technology is greatly innovated and improved in two aspects of process and working procedure, the quality and efficiency of well drilling are improved, a technical basis can be provided for realizing efficient and accurate mining of deep sandstone uranium ores, and meanwhile, the industrial application of the technology can reduce the cost for mine enterprises.
The secondary well completion process is divided into two parts: drilling engineering and well construction engineering.
Drilling engineering stage: the method adopts a high-power drilling machine to complete three procedures of drilling a naked eye hole, casing and cementing.
(1) In the open hole drilling stage, the underground pipe column is as follows:
tricone bit + drill collar + drilling rod. By using a large rowAnd (5) measuring the mud pump to improve the drilling speed.
(2) And after the drilling of the naked eye is finished, the PVC casing pipe is singly put to the pointed depth according to the logging result and the construction design.
(3) By using
The drill rod serves as a grouting pipe, and slip casting operation is completed by adopting a sliding sleeve type reverse grouting device.
After the reverse grouting operation is completed, the high-power drilling machine can be moved away from the well site, and the open hole drilling construction of the next drilling hole is continued. And then moving the low-power drilling rig to the wellhead to enter a well construction stage.
And (3) well construction engineering stage: and a low-power drilling machine is adopted to complete casing pipe cutting, filter arrangement in the lower part and gravel reverse throwing operation.
(1) Determining the position of the deposit and the cutting position according to the logging result by
And (4) finishing the cutting operation by the cutter and the drill rod, and cleaning the well wall of the cutting section by using the reamer.
(2) After cutting, use
The gravel throwing pipe is used for lowering the built-in filter and the counter-sound gravel throwing device to a cutting position, and a low-power pump is used for completing gravel throwing operation, wherein the thrown gravel is artificial gravel.
It can be seen that the secondary well completion technology becomes the main technology of the drilling construction of the leaching mountain in China at present, and the reverse gravel feeding is particularly important for the well completion quality as the last technical link of the whole technology.
The gravel throwing process adopted at present is mainly carried out by utilizing a slurry pump, namely, the artificial gravel is fully mixed with water and then pumped by utilizing the slurry pump. The method has simple ground pipeline but low efficiency, and the main reason is that the density of the artificial gravel adopted by the reverse gravel filling is lower than that of clear water, the artificial gravel cannot be fully mixed with the clear water, and the slurry pump cannot uniformly suck gravel materials. Meanwhile, the suction speed of gravel materials cannot be controlled, so that the rhythm of the whole gravel feeding process cannot be mastered, excessive gravel is pumped into the gravel feeding device for a short time frequently to cause blockage, and the gravel feeding quality is difficult to guarantee.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a reverse gravel filling device, which solves the problems in the prior art, realizes multiple functions of flushing, gravel throwing, intermittent gravel throwing, small-flow gravel throwing and the like, and improves the controllability and success rate of a reverse gravel filling process in the process of a secondary well completion process.
In order to achieve the purpose, the utility model provides the following scheme:
the utility model provides a reverse gravel filling device which comprises a gravel throwing tank, a water pool, a first pipeline and a second pipeline, wherein a liquid inlet is formed in the bottom of the gravel throwing tank, the water pool is communicated with the liquid inlet through the first pipeline, a power structure is arranged on the first pipeline, one end of the second pipeline is communicated with the first pipeline, the other end of the second pipeline is communicated with a well, a liquid outlet is formed in the top of the gravel throwing tank, the liquid outlet is communicated with the second pipeline, and a filling port is formed in the gravel throwing tank and used for filling gravel into the gravel throwing tank.
Preferably, the gravel throwing tank is further provided with a safety valve and a pressure gauge, the pressure gauge is used for detecting the pressure in the gravel throwing tank, and the opening degree of the safety valve is adjusted according to the pressure in the gravel throwing tank detected by the pressure gauge.
Preferably, the reverse gravel filling device further comprises a third pipeline, an exhaust valve is arranged on the third pipeline, one end of the third pipeline is communicated with the second pipeline, and the other end of the third pipeline is communicated with the atmosphere.
Preferably, the bottom of the gravel throwing tank is also provided with an emptying port, and the emptying port is provided with an emptying valve.
Preferably, a liquid inlet valve is arranged at the liquid inlet; and a liquid outlet valve is arranged at the liquid outlet.
Preferably, the tank body of the gravel throwing tank comprises an upper tank body and a lower tank body, the upper tank body is positioned above the lower tank body, the upper tank body is connected with the lower tank body, and the size of the upper tank body is gradually increased from top to bottom.
Preferably, a first valve is arranged on the second pipeline, and the first valve is located between the liquid outlet and the power structure.
Preferably, a second valve is disposed on the second conduit and is located between the liquid outlet and the well.
Preferably, the power structure is a mud pump.
Compared with the prior art, the utility model has the following technical effects:
the utility model can realize multiple functions of flushing, gravel throwing, intermittent gravel throwing and small-flow gravel throwing, and particularly, liquid can enter the well through the second pipeline during flushing; when gravel is thrown, gravel is filled into the gravel throwing tank through the filling port, liquid is introduced into the gravel throwing tank through the first pipeline, and the liquid and the gravel are mixed and then enter the well through the liquid outlet and the second pipeline; when the gravel is thrown intermittently, the processes of flushing and throwing the gravel are alternately carried out; when the gravel is thrown at a small flow rate, the first pipeline and the second pipeline work simultaneously, so that the flow rate of the gravel entering the well is reduced. The utility model improves the controllability and the success rate of the reverse gravel filling process in the secondary well completion process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of a reverse gravel packing apparatus of the present invention;
wherein: 100-reverse gravel filling device, 1-power structure, 2-gravel throwing tank, 3-filling port, 4-liquid inlet valve, 5-first valve, 6-second valve, 7-liquid outlet valve, 8-exhaust valve, 9-evacuation valve, 10-well, 11-safety valve, 12-pressure gauge, 13-water pool, 14-first pipeline, 15-second pipeline and 16-third pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The utility model aims to provide a reverse gravel filling device, which solves the problems in the prior art, realizes multiple functions of flushing, gravel throwing, intermittent gravel throwing, small-flow gravel throwing and the like, and improves the controllability and success rate of a reverse gravel filling process in the process of a secondary well completion process.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1: this embodiment provides a reverse gravel pack device 100, including throwing gravel jar 2, pond 13, first pipeline 14 and second pipeline 15, the bottom of throwing gravel jar 2 is provided with the inlet, pond 13 passes through first pipeline 14 intercommunication with the inlet, be provided with power structure 1 on the first pipeline 14, provide power for reverse gravel pack device 100, the one end and the first pipeline 14 intercommunication of second pipeline 15, the other end and the well 10 intercommunication of second pipeline 15, the top of throwing gravel jar 2 is provided with the liquid outlet, the liquid outlet communicates with second pipeline 15, throw gravel jar 2 and still seted up filling opening 3, filling opening 3 is used for to throwing filling gravel in the gravel jar 2.
In this embodiment, the gravel throwing tank 2 is a pressure-bearing tank, the tank body of the gravel throwing tank 2 includes an upper tank body and a lower tank body, the upper tank body is located above the lower tank body, the upper tank body is connected with the lower tank body, and the size of the upper tank body is gradually increased from top to bottom. In the embodiment, the section of the upper tank body is triangular, so that gravel can be conveniently gathered at the top of the tank body.
In this embodiment, the gravel throwing tank 2 is further provided with a safety valve 11 and a pressure gauge 12, the pressure gauge 12 is used for detecting the pressure in the gravel throwing tank 2, and the opening degree of the safety valve 11 is adjusted according to the pressure in the gravel throwing tank 2 detected by the pressure gauge 12. When the pressure in the gravel throwing tank 2 reaches a threshold value, the safety valve 11 is opened to discharge liquid.
In this embodiment, the reverse gravel packing apparatus 100 further includes a third pipeline 16, an exhaust valve 8 is disposed on the third pipeline 16, one end of the third pipeline 16 is communicated with the second pipeline 15, the other end of the third pipeline 16 is communicated with the atmosphere, and after gravel is packed, the exhaust valve 8 needs to be opened to remove excess gas in the gravel packing tank 2.
In this embodiment, the bottom of the gravel throwing tank 2 is further provided with an evacuation port, an evacuation valve 9 is arranged at the evacuation port, and after the gravel throwing operation is completed, the evacuation valve 9 is opened to evacuate the liquid and the remaining gravel in the gravel throwing tank 2.
In this embodiment, the liquid inlet is provided with a liquid inlet valve 4.
In this embodiment, the liquid outlet is provided with a liquid outlet valve 7.
In this embodiment, the second pipeline 15 is provided with a first valve 5, and the first valve 5 is located between the liquid outlet and the power structure 1.
In this embodiment, the second valve 6 is disposed on the second pipeline 15, and the second valve 6 is located between the liquid outlet and the well 10. With the inlet valve 4 and the outlet valve 7 closed, the first valve 5 and the second valve 6 are opened and the liquid can be injected directly into the well 10 without passing through the gravel placement tank 2.
In this embodiment, the power mechanism 1 is a slurry pump.
The embodiment can realize multiple functions of flushing, gravel throwing, intermittent gravel throwing and small-flow gravel throwing, and particularly, liquid can enter the well through the second pipeline 15 during flushing; when gravel is thrown, gravel is filled into the gravel throwing tank 2 through the filling port 3, liquid is introduced into the gravel throwing tank 2 through the first pipeline 14, and the liquid and the gravel are mixed and then enter a well through the liquid outlet and the second pipeline 15; when the gravel is thrown intermittently, the processes of flushing and throwing the gravel are alternately carried out; at low gravel placement rates, the first conduit 14 and the second conduit 15 operate simultaneously to reduce the gravel flow rate into the well. The method improves the controllability and the success rate of the reverse gravel filling process in the secondary well completion process.
The present embodiment also provides a reverse gravel packing method using the reverse gravel packing apparatus 100, comprising the steps of:
the first step is as follows: installing a reverse gravel filling device 100, and checking whether the pressure gauge 12 and the safety valve 11 are in a normal working state;
the second step is that: opening the filling port 3, and filling the gravel tank 2 with the artificial PE gravel in the designed amount, and sealing the filling port 3 after completion;
the third step: closing the first valve 5, the second valve 6 and the emptying valve 9, opening the liquid inlet valve 4, the liquid outlet valve 7 and the exhaust valve 8, opening the power structure 1, injecting liquid into the gravel casting tank 2 at a small displacement, and closing the exhaust valve 8 when the exhaust valve 8 discharges liquid, which indicates that the gravel casting tank 2 is filled with liquid;
the fourth step: opening a first valve 5 and a second valve 6, closing a liquid inlet valve 4, a liquid outlet valve 7, an exhaust valve 8 and an emptying valve 9 of the valves, directly injecting clear water into a well 10, dredging a pipeline, and completing establishment of a liquid flow channel when water returns from the mouth of the well 10;
the fifth step: the gravel throwing process comprises the following working conditions:
under a first working condition, a gravel throwing process is normal: closing the first valve 5, the exhaust valve 8 and the emptying valve 9, opening the liquid inlet valve 4, the liquid outlet valve 7 and the second valve 6, injecting the liquid in the water pool 13 into the gravel throwing tank 2 through the power structure 1 to cause pressure building, and injecting gravel floating on the upper part of the gravel throwing tank 2 into the well 10 through the liquid outlet valve 7 and the second valve 6 under the action of pressure;
and under the working condition II, adjusting the gravel throwing speed: according to the actual situation on site, when the gravel is thrown at the maximum discharge capacity in the normal gravel throwing process, if a pressure gauge 12 on the gravel throwing tank 2 indicates that the pressure is too large or a safety valve 11 reaches the maximum working pressure, an exhaust valve 8 and an emptying valve 9 are closed, a liquid outlet valve 7 and a second valve 6 are opened, the opening degrees of a first valve 5 and a liquid inlet valve 4 are adjusted (the first valve 5 is properly opened, and the liquid inlet valve 4 is properly closed), so that part of liquid enters the gravel throwing tank 2 through the liquid inlet valve 4, and part of liquid is mixed with gravel flowing out of the liquid inlet valve 4 through the first valve 5 and then is injected under a well 10 through the second valve 6;
and under the working condition three, intermittently throwing gravel and removing blockage: when the gravel is blocked in the pipeline, namely the gravel is bridged in the pipeline to cause the pipeline to be blocked, the exhaust valve 8 and the emptying valve 9 are closed, the liquid outlet valve 7 and the second valve 6 are opened, and the liquid inlet valve 4 and the first valve 5 are opened intermittently and alternately, so that the gravel and clean water are alternately injected into the well 10 to avoid the pipeline to be blocked;
and a sixth step: after the gravel throwing is finished, the first valve 5, the second valve 6, the liquid outlet valve 7 and the exhaust valve 8 are closed, the liquid inlet valve 4 and the emptying valve 9 are opened, and the gravel throwing tank 2 is washed.
The test of the embodiment is carried out on site, and the test effect is good. The embodiment well solves the problems of low gravel throwing efficiency and low success rate in the well drilling process of the ground leaching process.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (9)
1. A reverse gravel pack apparatus, comprising: including throwing gravel jar, pond, first pipeline and second pipeline, the bottom of throwing gravel jar is provided with the inlet, the pond with the inlet passes through first pipeline intercommunication, be provided with power structure on the first pipeline, the one end of second pipeline with first pipeline intercommunication, the other end and the well intercommunication of second pipeline, the top of throwing gravel jar is provided with the liquid outlet, the liquid outlet with the second pipeline intercommunication, throw gravel jar and still seted up and fill the mouth, fill the mouth be used for to throw gravel jar interior packing gravel.
2. The reverse gravel pack apparatus of claim 1, wherein: the gravel throwing tank is also provided with a safety valve and a pressure gauge, the pressure gauge is used for detecting the pressure in the gravel throwing tank, and the opening of the safety valve is adjusted according to the pressure in the gravel throwing tank detected by the pressure gauge.
3. The reverse gravel pack apparatus of claim 1, wherein: the reverse gravel filling device further comprises a third pipeline, an exhaust valve is arranged on the third pipeline, one end of the third pipeline is communicated with the second pipeline, and the other end of the third pipeline is communicated with the atmosphere.
4. The reverse gravel pack apparatus of claim 1, wherein: the bottom of the gravel throwing tank is also provided with an emptying port, and an emptying valve is arranged at the emptying port.
5. The reverse gravel pack apparatus of claim 1, wherein: a liquid inlet valve is arranged at the liquid inlet; and a liquid outlet valve is arranged at the liquid outlet.
6. The reverse gravel pack apparatus of claim 1, wherein: the gravel throwing tank comprises an upper tank body and a lower tank body, wherein the upper tank body is positioned above the lower tank body, the upper tank body is connected with the lower tank body, and the size of the upper tank body is gradually increased from top to bottom.
7. The reverse gravel pack apparatus of claim 1, wherein: and a first valve is arranged on the second pipeline and is positioned between the liquid outlet and the power structure.
8. The reverse gravel pack apparatus of claim 1, wherein: and a second valve is arranged on the second pipeline and positioned between the liquid outlet and the well.
9. The reverse gravel pack apparatus of claim 1, wherein: the power structure is a mud pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122368338.0U CN215804489U (en) | 2021-09-28 | 2021-09-28 | Reverse gravel filling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122368338.0U CN215804489U (en) | 2021-09-28 | 2021-09-28 | Reverse gravel filling device |
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| Publication Number | Publication Date |
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| CN215804489U true CN215804489U (en) | 2022-02-11 |
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| CN202122368338.0U Active CN215804489U (en) | 2021-09-28 | 2021-09-28 | Reverse gravel filling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756760A (en) * | 2021-09-28 | 2021-12-07 | 核工业北京化工冶金研究院 | Reverse gravel filling device and reverse gravel filling method |
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2021
- 2021-09-28 CN CN202122368338.0U patent/CN215804489U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756760A (en) * | 2021-09-28 | 2021-12-07 | 核工业北京化工冶金研究院 | Reverse gravel filling device and reverse gravel filling method |
| CN113756760B (en) * | 2021-09-28 | 2024-05-07 | 核工业北京化工冶金研究院 | Reverse gravel filling device and reverse gravel filling method |
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