Sand bailing pump device for bailing deep coal bed gas horizontal well

Abstract

The utility model provides a sand bailing pump device for bailing of a deep coal bed gas horizontal well, and belongs to the technical field of sand bailing pumps. Comprising a connecting pipe and a heating coil pipe communicated with the bottom end of the connecting pipe, and the top end of the connecting pipe is connected with a pump body. By arranging the pen container, coal sand enters the second cavity in the pen container, meanwhile, high-pressure gas is conveyed into the conveying pipe through the connecting pipe and the heating ring pipe, the high-pressure gas makes contact with the coal sand in the second cavity, the high-pressure gas continuously shuttles among the coal sand, and the drying degree of the coal sand is improved; the situation that due to the fact that the humidity and viscosity of the coal sand are large, blockage is easily formed in the pump body, and circulation is slow or stopped is avoided, meanwhile, the high-pressure gas wraps the coal sand to move upwards in the shuttling process, certain thrust is exerted on the coal sand, and discharging of the coal sand is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of sand bailing pumps, in particular to a sand bailing pump device used for bailing sand in deep coalbed methane horizontal wells. Background Art

[0002] A sand bailing pump is a downhole tool used to remove sand from a wellbore. It sucks in sand and brings it to the surface through up and down reciprocating motion. The structure of a sand bailing pump usually includes components such as a pressure relief hole, an outer tube, a pressure hoop, a pull rod, a piston, a rubber, a ball valve, and a pen tip.

[0003] At present, when the existing sand bailing pump device is in use, it is easy to form blockage in the pump body due to the high humidity and viscosity of the coal sand. The blockage will reduce the flow capacity of the pump, resulting in a significant decrease in the sand bailing efficiency, which means that it takes a longer time to remove the same amount of coal sand, thereby reducing the overall work efficiency. Continuous blockage will increase the wear inside the pump, which may cause damage to key components, shorten the service life of the equipment, and increase the cost of maintenance and replacement. Therefore, the present application provides a sand bailing pump device for bailing sand in deep coalbed methane horizontal wells to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sand bailing pump device for bailing sand in deep coalbed methane horizontal wells to solve the problem that the humidity and viscosity of coal sand in the existing sand bailing process are relatively high and blockage is easily formed in the pump body.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A sand bailing pump device for bailing sand in a deep coalbed methane horizontal well, comprising:

[0007] A pump body and a storage tube connected to the bottom end of the pump body, the bottom end of the storage tube is connected to a pen holder and a pen tip connected to the bottom end of the pen holder, a first one-way valve is provided between the storage tube and the pen holder, and the inner cavity of the pen holder is provided with an air jet portion; the air jet portion includes a connecting tube and a heating coil tube connected to the bottom end of the connecting tube, the top end of the connecting tube is connected to the pump body, the heating coil tube is connected to the top end of the inner cavity of the pen holder, and the bottom end of the heating coil tube is provided with at least two delivery tubes, the two delivery tubes are mirror-imaged with the center of the inner cavity of the pen holder, a plurality of nozzles are provided on the side of the two delivery tubes close to the inner cavity of the pen holder, and the side of the nozzles away from the delivery tubes penetrates into the inner cavity of the pen holder.

[0008] The surface of the pen head is provided with a spiral groove, and the inner cavity of the spiral groove is provided with a plurality of through holes.

[0009] The left side of the pump body is connected with a first channel tube and a second channel tube connected with the top end of the first channel tube.

[0010] The first channel tube is L-shaped, and a second one-way valve is provided between the first channel tube and the second channel tube.

[0011] The top end of the second channel pipe is connected to a sand control screen pipe and a discharge pipe connected to the top end of the sand control screen pipe.

[0012] The inner cavity of the sand control screen pipe is provided with a filter screen, and the number of the filter screens is at least two.

[0013] The nozzle is inclined, and the pen holder is provided with two inner cavities, which are respectively a first cavity and a second cavity. The jet part is located in the first cavity, and the second cavity is used for sand to pass through the channel when scooping sand.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] In the above scheme, by setting a pen holder, the coal sand enters the second cavity in the pen holder, and at the same time, high-pressure gas is transported into the delivery pipe through the connecting pipe and the heating coil pipe, so that the high-pressure gas contacts the coal sand in the second cavity. The high-pressure gas shuttles between the coal sands to improve the dryness of the coal sands themselves, avoiding blockage in the pump body due to the high humidity and viscosity of the coal sands, causing slow or stopped circulation. At the same time, the high-pressure gas wraps the coal sands and moves upward during the shuttling process, exerts a certain thrust on the coal sands, and accelerates the discharge of the coal sands. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a sand bailing pump device used for bailing sand in deep coalbed methane horizontal wells;

[0018] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle pen tip;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the sand control screen;

[0020] Figure 4 for Figure 1 A partially enlarged cross-sectional view of the structure of the middle pen holder.

[0021] [reference numerals]

[0022] 1. Pump body; 2. Discharge pipe; 3. Sand screen pipe; 4. Second channel pipe; 5. Second one-way valve; 6. First channel pipe; 7. Storage pipe; 8. First one-way valve; 9. Pen holder; 10. Pen tip; 11. Through hole; 12. Spiral groove; 13. Jet part; 14. Filter; 131. Connecting pipe; 132. Heating coil pipe; 133. Delivery pipe; 134. Spray pipe.

[0023] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0024] The following is a detailed description of a sand bailing pump device for bailing sand in deep coalbed methane horizontal wells provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0025] like Figure 1 and Figure 4 As shown, an embodiment of the utility model provides a sand bailing pump device for bailing sand in deep coalbed methane horizontal wells, comprising: a pump body 1 and a storage tube 7 connected to the bottom end of the pump body 1, the bottom end of the storage tube 7 is connected to a pen barrel 9 and a pen head 10 connected to the bottom end of the pen barrel 9, a first one-way valve 8 is arranged between the storage tube 7 and the pen barrel 9, and the inner cavity of the pen barrel 9 is provided with an injection part 13; the injection part 13 comprises a connecting tube 131 and a heating coil tube 132 connected to the bottom end of the connecting tube 131, the top end of the connecting tube 131 is connected to the pump body 1, the heating coil tube 132 is connected to the top end of the inner cavity of the pen barrel 9, and at least two delivery pipes 133 are arranged at the bottom end of the heating coil tube 132, the two delivery pipes 133 are arranged in a mirror image with the center of the inner cavity of the pen barrel 9, a plurality of nozzles 134 are arranged on the side of the two delivery pipes 133 close to the inner cavity of the pen barrel 9, and the side of the nozzle 134 away from the delivery pipe 133 passes through the inner cavity of the pen barrel 9.

[0026] The purpose of setting the heating coil tube 132 is to allow the high-pressure gas to enter the heating coil tube 132 through the connecting tube 131, and then increase the temperature of the high-pressure gas through the heating coil tube 132, so as to facilitate the subsequent improvement of the drying degree of the coal sand; by setting the conveying pipe 133, the number of conveying pipes 133 around the heating coil tube 132 can be increased, and the number is at least two, and the two conveying pipes 133 are in corresponding positions, so as to facilitate the blowing of the coal sand when it passes by, and to contact the coal sand to a greater extent, so as to avoid the coal sand blocking the pipeline.

[0027] like Figure 1 and Figure 2 As shown, a spiral groove 12 is provided on the surface of the pen tip 10 , and a plurality of through holes 11 are provided in the inner cavity of the spiral groove 12 .

[0028] By setting the spiral groove 12, the coal sand can be guided to move upward along the spiral path, reducing direct accumulation and blockage, and increasing the surface area of ​​the coal sand in contact with the pen head 10, making it easier to scoop up the sand and transport it upward, thereby improving the sand scooping efficiency. It can also reduce the direct impact of the coal sand on the pen head 10 and extend the service life of the pen head 10. By setting the through hole 11, its purpose is to allow fine particles and liquids to pass through, further reducing the risk of blockage. The through hole 11 can balance the pressure to avoid accelerated wear due to excessive local pressure. At the same time, the through hole 11 can be arranged in a variety of ways such as staggered or irregular arrangements.

[0029] like Figure 1 As shown, the left side of the pump body 1 is connected with a first channel tube 6 and a second channel tube 4 connected to the top end of the first channel tube 6 .

[0030] By setting up the first channel tube 6, the coal sand sucked by the pen head 10 can be transported, providing a pipeline path for the discharge of the coal sand. At the same time, the first channel tube 6 can be made of durable materials with good durability and firmness, so that it will not be damaged after long-term use. At the same time, it is also corrosion-resistant to avoid corrosion when used in a horizontal well, resulting in leakage of coal sand.

[0031] like Figure 1 As shown, the first channel tube 6 is L-shaped, and a second one-way valve 5 is provided between the first channel tube 6 and the second channel tube 4 .

[0032] The second one-way valve 5 is provided to allow only coal sand to flow from the inside of the pump to the outside of the pump, thereby preventing the discharged coal sand and liquid from flowing back into the pump, causing blockage and reduced efficiency, and preventing backflow during use, thereby damaging the device.

[0033] like Figure 1 As shown, the top end of the second channel pipe 4 is connected to the sand control screen pipe 3 and the top end of the sand control screen pipe 3 is connected to the discharge pipe 2 .

[0034] The purpose of providing the sand-proof screen 3 is to prevent coal sand and other particulate matter from entering the pump body 1, thereby protecting the internal mechanism of the pump from wear and tear, avoiding possible blockage problems, and improving work efficiency.

[0035] like Figure 3 As shown, the inner cavity of the sand control screen pipe 3 is provided with a filter screen 14, and the number of the filter screens 14 is at least two.

[0036] The purpose of providing the filter screen 14 is to filter the coal powder, reduce the coal powder from flowing back into the well through the sand control screen pipe 3, and improve the filtering effect.

[0037] like Figure 1 and Figure 4 As shown, the nozzle 134 is inclined, and the pen holder 9 is provided with two inner cavities, which are respectively a first cavity and a second cavity. The jet part 13 is located in the first cavity, and the second cavity is used for sand to pass through the channel when scooping sand.

[0038] By setting up two inner cavities, the jet part 13 can be prevented from directly contacting with the coal sand, thereby avoiding damage to the jet part 13. At the same time, the coal sand can be transported through the second cavity during use, thereby avoiding the coal sand from entering the jet part 13 and causing damage to the jet part 13, thereby increasing the service life.

[0039] The technical solution provided by the utility model is that when in use, the sand bailing pump device extends the pen head 10 into the horizontal well, so that the pen head 10 contacts the coal sand in the horizontal well, which is beneficial for the nephew controller to start the pump body 1 and the first one-way valve 8 to operate, and the coal sand is sucked into the second cavity in the pen barrel 9 through the through hole 11 on the pen head 10. At the same time, the pump body 1 conveys high-pressure gas to the delivery pipe 133 through the connecting pipe 131 and the heating coil pipe 132 to contact the coal sand in the second cavity. The high-pressure gas keeps shuttling between the coal sand to improve the dryness of the coal sand itself. At the same time, the high-pressure gas wraps the coal sand and moves upward during the shuttling process, opening the second one-way valve 5, so that the coal sand passes through the sand control screen pipe 3 and the filter screen 14, and is finally discharged through the discharge pipe 2.

[0040] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A sand bailing pump device for bailing sand in deep coalbed methane horizontal wells, characterized in that: include: A pump body (1) and a storage tube (7) connected to the bottom end of the pump body (1); the bottom end of the storage tube (7) is connected to a pen holder (9) and a pen tip (10) connected to the bottom end of the pen holder (9); a first one-way valve (8) is provided between the storage tube (7) and the pen holder (9); and an air jet portion (13) is provided in the inner cavity of the pen holder (9); The jetting part (13) comprises a connecting tube (131) and a heating coil tube (132) connected to the bottom end of the connecting tube (131); the top end of the connecting tube (131) is connected to the pump body (1); the heating coil tube (132) is connected to the top end of the inner cavity of the pen barrel (9); at least two delivery tubes (133) are arranged at the bottom end of the heating coil tube (132); the two delivery tubes (133) are arranged in a mirror image with the center of the inner cavity of the pen barrel (9); a plurality of nozzles (134) are arranged on the side of the two delivery tubes (133) close to the inner cavity of the pen barrel (9); the nozzles (134) penetrate into the inner cavity of the pen barrel (9) on the side away from the delivery tubes (133).

2. The sand bailing pump device for bailing sand in deep coalbed methane horizontal wells according to claim 1, characterized in that: The surface of the pen tip (10) is provided with a spiral groove (12), and the inner cavity of the spiral groove (12) is provided with a plurality of through holes (11).

3. The sand bailing pump device for bailing sand in deep coalbed methane horizontal wells according to claim 1, characterized in that: The left side of the pump body (1) is connected to a first channel tube (6) and a second channel tube (4) connected to the top end of the first channel tube (6).

4. The sand bailing pump device for bailing sand in deep coalbed methane horizontal wells according to claim 3, characterized in that: The first channel tube (6) is L-shaped, and a second one-way valve (5) is provided between the first channel tube (6) and the second channel tube (4).

5. The sand bailing pump device for bailing sand in deep coalbed methane horizontal wells according to claim 3, characterized in that: The top end of the second channel pipe (4) is connected to a sand control screen pipe (3) and a discharge pipe (2) connected to the top end of the sand control screen pipe (3).

6. The sand bailing pump device for bailing sand in deep coalbed methane horizontal wells according to claim 5, characterized in that: The inner cavity of the sand control screen pipe (3) is provided with a filter screen (14), and the number of the filter screens (14) is at least two.

7. The sand bailing pump device for bailing sand in deep coalbed methane horizontal wells according to claim 1, characterized in that: The nozzle (134) is inclined, and the pen holder (9) is provided with two inner cavities, which are respectively a first cavity and a second cavity. The jet part (13) is located in the first cavity, and the second cavity is used for sand to pass through the channel when scooping sand.

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