Sludge filter pressing device for treating water-based drilling cuttings

Abstract

The utility model relates to the technical field of drilling treatment, and discloses a sludge filter pressing device for water-based drilling cuttings disposal, which comprises a frame body, a plurality of filter pressing boxes are arranged on the frame body, the filter pressing boxes are sequentially arranged on the frame body and are communicated with one another, and the filter pressing boxes can move along the extension direction of the frame body; air bags are arranged in the filter pressing boxes, the space between every two adjacent filter pressing boxes is used for being filled with the drilling cuttings, and the air bags are used for extruding the drilling cuttings; the filter pressing box is connected with a drainage pipe, the drainage pipe is used for outputting filter pressing sewage, a conveying belt is arranged at the bottom of the filter pressing box, and the conveying belt is used for collecting and conveying solid drilling cuttings obtained after filter pressing. The drilling cuttings filter pressing device has the advantages of being good in filtering effect and high in drilling cuttings filter pressing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling treatment, in particular to a sludge filter press device for water-based drilling cuttings treatment. Background Art

[0002] Drilling fluid refers to the general term for various circulating fluids that meet the needs of drilling work with their multiple functions during oil and gas drilling. According to the different continuous phases, drilling methods are divided into water-based drilling and oil-based drilling. Among them, water-based drilling is the most commonly used drilling method because of its advantages such as low cost, simple configuration, processing and maintenance, wide source of treatment agents, many types to choose from, easy performance control, and potential environmental acceptability and good reservoir protection. A large amount of rock cuttings are usually generated during the drilling process. The rock cuttings are mixed with drilling fluid and transported to the ground. When processing the rock cuttings, it is usually necessary to filter and process the rock cuttings and drilling fluid.

[0003] For example, the patent document with the publication number CN108525379B discloses a drilling mud filtering device for oil mining. It includes a first mud pool, a discharge pipe, a valve, a second mud pool, an inclined plate, etc.; the lower right part of the first mud pool is connected to a discharge pipe, the discharge pipe is connected to the first mud pool, a valve is provided on the discharge pipe, the left side outside the first mud pool is connected to the second mud pool, and the second mud pool is connected to the first mud pool. This technical solution can further filter the mud through the secondary filtering device, and through the flipping device, there is no need to manually flip the frame, which achieves the effect of saving time and labor and having a good filtering effect.

[0004] Although the above technical solution can filter the mud generated during the drilling process, the above technical solution only filters the mud through a filtering device, so that a large amount of water will still exist in the drilling cuttings after filtration, resulting in the inability to fully separate the solids and liquids in the drilling cuttings. The filtered drilling cuttings solids still need to undergo secondary treatment before they can be discharged or recycled, which increases the steps of drilling cuttings solid recovery and treatment, resulting in low drilling cuttings recovery and treatment efficiency. Utility Model Content

[0005] The utility model aims to provide a sludge filter press device for water-based drilling cuttings disposal, so as to solve the technical problems in the prior art that a large amount of water still exists in the drilling cuttings after filtration and the separation efficiency of solid and liquid in the drilling cuttings is low.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sludge filter press device for water-based drilling cuttings disposal, including a frame, on which a plurality of filter press boxes are arranged in sequence on the frame and are interconnected, and the filter press boxes can move along the extension direction of the frame; an air bag is provided in the filter press box, which is used to fill the drilling cuttings between adjacent filter press boxes, and the air bag is used to squeeze the drilling cuttings; the filter press box is connected to a drain pipe, and the drain pipe is used to output filtered sewage, and a conveyor belt is provided at the bottom of the filter press box, and the conveyor belt is used to collect and transport solid drilling cuttings after filtration.

[0007] The principle and advantage of this scheme are: when filtering drilling cuttings, the filter press boxes are moved on the frame so that the filter press boxes are closely arranged, and drilling cuttings are injected into the filter press boxes. The drilling cuttings are filled between the filter press boxes under the action of the connecting pipe. The airbags are inflated, so that the drilling cuttings between the filter press boxes are filtered under the pressure of the airbags on both sides, and the moisture in the drilling cuttings is separated from the solid drilling cuttings and discharged through the drain pipe. After the filtration is completed, the filter press boxes are moved to the side away from the feed port, so that the filter press boxes are separated from each other, and the drilling cuttings solids squeezed between the filter press boxes fall on the conveyor belt for transportation.

[0008] In this solution, when filtering drilling cuttings, the drilling cuttings are injected into multiple filter press boxes and filtered by squeezing, ensuring that the solids and liquids in the drilling cuttings can be fully separated during the squeezing process, so that the solids after the filter pressing can be directly recovered and processed, avoiding the need for secondary filtration processing when the solids after the filter pressing of the drilling cuttings are recovered and processed, thereby simplifying the processing procedures and steps of the drilling cuttings; and ensuring that a large amount of drilling cuttings can be filtered simultaneously when the drilling cuttings are filtered, thereby ensuring the filtering efficiency of the drilling cuttings.

[0009] Preferably, as an improvement, slide rails are laid on both sides of the frame, and the extension direction of the slide rails is consistent with the extension direction of the frame, so that each filter press box can move smoothly on the bracket during the filter press. A pressure plate is slidably connected to one end of the frame, and the pressure plate is connected to the slide rails, and the pressure plate can move along the extension direction of the frame.

[0010] Preferably, as an improvement, the plane where the pressure plate is located is parallel to the plane where the filter press box is located, one side of the pressure plate is in contact with the surface of the filter press box, and the other side is connected to the power assembly, so that the filter press boxes can be in close contact under the action of the pressure plate, ensuring the tightness of the circumferential fit between the filter press boxes, and preventing the solids in the drilling cuttings from leaking out of the gaps between the filter press boxes.

[0011] Preferably, as an improvement, a feed port is provided at one end of the frame, one end of the feed port is connected to a feed pipe, and the other end is connected to the filter press box, and the feed port is used to transport drilling cuttings into the filter press box.

[0012] Preferably, as an improvement, a baffle is provided at one end of the frame, the baffle is parallel to the filter press box, the feed inlet is located at the center of the baffle, and the feed inlet runs through both sides of the baffle. Each filter press box can maintain a stable position under the action of the baffle, thereby improving the compactness of the arrangement between the filter press boxes.

[0013] Preferably, as an improvement, the filter press box includes a frame, filter screens are laid on both sides of the frame, a connecting pipe is provided in the center of the filter press box, and the connecting pipe is a hose, which is used to connect the two sides of the filter press box. While ensuring that multiple filter press boxes can be filled with drilling cuttings through one feed port, the drilling cuttings can be evenly diffused to the surroundings when filled between the filter press boxes, thereby improving the uniformity of the distribution of drilling cuttings between the filter press boxes and ensuring the filtration effect of the drilling cuttings. In addition, the connecting pipe is set as a hose, so that when the drilling cuttings are filtered, the connecting pipe can be deformed during the filtration process, and the drilling cuttings in the connecting pipe can be filtered, so that the drilling cuttings filled in the filter press device can be fully filtered, reducing the liquid residue in the solid after the separation of the drilling cuttings, and improving the separation effect of the solid and liquid in the drilling cuttings.

[0014] Preferably, as an improvement, two layers of filter screens are arranged on both sides of the frame, and the two layers of filter screens are staggered with each other. When the drilling cuttings are filtered, the two layers of filter screens can support each other, avoiding damage to the filter screen due to excessive pressure during the filtration, and filtering by two layers of superimposed filter screens allows the drilling cuttings to be filtered more finely during the filtration, avoiding fine debris in the drilling cuttings from passing through the filter screen during the filtration process, thereby affecting the effect of the drilling cuttings filtration.

[0015] Preferably, as an improvement, a containing cavity is formed between the filters on both sides of the frame, the airbag is located in the containing cavity, and the air inlet of the airbag is connected to the inflation device.

[0016] Preferably, as an improvement, multiple support protrusions are provided on both sides of the filter press box, and the multiple support protrusions are evenly distributed along the circumference of one end of the connecting pipe, and the support protrusions protrude from the plane where the filter screen is located. This allows the support protrusions to reserve enough space between the filter press boxes to accommodate drilling cuttings, thereby preventing the filter screens between the filter press boxes from sticking to each other, resulting in the inability to normally inject drilling cuttings between the filter press boxes, and reducing the processing capacity of the filter press device when it is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the structure of a sludge filter press device for water-based drilling cuttings disposal in an embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of the structure of the filter press box in the embodiment of the utility model. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods:

[0020] The figure marks in the drawings of the specification include: frame 1, filter press box 2, frame 201, filter screen 202, connecting pipe 203, supporting protrusion 204, supporting frame 205, pressure plate 3, cylinder 4, baffle 5, feed port 6, drain pipe 7, conveyor belt 8.

[0021] As attached Figure 1 As shown, a sludge filter press device for water-based drilling cuttings disposal includes a frame 1, on which a plurality of filter press boxes 2 are arranged in sequence. The filter press boxes 2 can move along the extension direction of the frame 1 and squeeze with adjacent filter press boxes 2 to separate solids and liquids in the drilling cuttings.

[0022] Slide rails are laid on both sides of the frame 1, and the extension direction of the slide rails is consistent with the extension direction of the frame 1; the two sides of the plurality of filter press boxes 2 are slidably connected to the slide rails through rollers, and each filter press box 2 can move forward and backward along the extension direction of the frame 1. A pressure plate 3 is slidably connected to one end of the frame 1, and rollers are respectively installed on both sides of the pressure plate 3, and the rollers are connected to the slide rails. The plane where the pressure plate 3 is located is parallel to the plane where the filter press box 2 is located, one side of the pressure plate 3 is in contact with the surface of the filter press box 2, and the other side is connected to the power assembly, and the specific power assembly can be a cylinder 4 or a motor or other driving power device. Preferably, in this embodiment, the side of the pressure plate 3 away from the filter press box 2 is connected to the output shaft of the cylinder 4, and the cylinder 4 is used to push the pressure plate 3 to move along the extension direction of the frame 1. Each filter press box 2 can be in close contact under the action of the pressure plate 3, ensuring the tightness of the circumferential fit between each filter press box 2, and preventing the solids in the drilling cuttings from flowing out of the gap between the filter press boxes 2.

[0023] A feed port 6 is provided at one end of the frame 1 away from the pressure plate 3, one end of the feed port 6 is connected to the feed pipe, and the other end is connected to the filter press box 2 near the feed port 6, and the feed port 6 is used to transport drilling cuttings into the filter press box 2. Specifically, a baffle 5 is welded at one end of the frame 1 away from the pressure plate 3, the baffle 5 is parallel to the pressure plate 3, a feed port 6 is opened in the center of the baffle 5, and the feed port 6 runs through both sides of the baffle 5; wherein one end of the feed port 6 away from the pressure plate 3 is threadedly connected to the feed pipe, and the other end is connected to the filter press box 2, so that the drilling cuttings can be normally transported to the filter press box 2 for filter pressing processing.

[0024] As attached Figure 2As shown, the filter press box 2 includes a frame 201, and filter screens 202 are laid on both sides of the frame 201, and the plane where the filter screens 202 are located is parallel to the plane where the pressure plate 3 is located; wherein two layers of filter screens 202 are laid on each side of the frame 201, and the two layers of filter screens 202 are staggered with each other, so that when the drilling cuttings are filter pressed, the two layers of filter screens can support each other, and avoid the filter screen 201 from being damaged due to excessive pressure during the filter press, and filtering by two superimposed layers of filter screens 201 makes it possible to filter the drilling cuttings more densely during the filter press, and avoid fine debris in the drilling cuttings from passing through the filter screen 201 during the filter press, thereby affecting the effect of the drilling cuttings filtration. A connecting pipe 203 is provided at the center of the filter press box 2. The connecting pipe 203 is used to connect the two sides of the filter press box 2. The two ends of the connecting pipe 203 are respectively connected to the filter screens 202 located on the two sides of the frame 201, and the extension direction of the connecting pipe 203 is consistent with the extension direction of the frame 1. The connecting pipe 203 is used to fill the drilling cuttings between the filter press boxes 2. The connecting pipe 203 is a hose, so that when the drilling cuttings are filtered, the connecting pipe 203 can also be deformed during the filtering, so as to realize the filtering of the drilling cuttings in the connecting pipe 203, so that the drilling cuttings filled in the filter press device can be fully filtered, reduce the liquid residue in the solid after the separation of the drilling cuttings, and improve the separation effect of the drilling cuttings solid and liquid.

[0025] There is a receiving cavity between the filter screens 202 on both sides of the frame 201, and the receiving cavity is filled with an air bag, and the air inlet of the air bag is connected to the inflation device. Multiple support protrusions 204 are fixedly connected on both sides of the filter press box 2 by bolts, and the multiple support protrusions 204 are evenly distributed along the circumference of one end of the connecting pipe 203, and the end of the support protrusion 204 away from the filter press box 2 is higher than the plane where the filter screen 202 is located. The support protrusions 204 can reserve enough space between the filter press boxes 2 to accommodate drilling cuttings, so as to avoid the filter screens 202 between the filter press boxes 2 sticking to each other, resulting in the inability to normally inject drilling cuttings between the filter press boxes 2, thereby reducing the processing capacity of the filter press device when working.

[0026] Support frames 205 are fixedly installed on both sides of the filter press box 2 by bolts. The support frames 205 extend outward on both sides of the filter press box 2, and the extension direction of the support frames 205 is perpendicular to the extension direction of the slide rail. Rollers are installed on the support frames 205, and the rollers are slidably connected to the slide rails. A motor is also installed on the support frames 205, and the output shaft of the motor is connected to the rollers through a reducer. After the filter press is completed, each filter press box 2 can be automatically separated under the action of the motor, so that the solid residue after the filter press is automatically discharged under the action of gravity.

[0027] A drainage hole is provided at the bottom of the accommodating chamber, and one end of the drainage hole away from the accommodating chamber is connected to the drainage pipe 7. The drainage hole is used to discharge the water filtered by pressure in the filter press box 2 through the drainage pipe 7. A conveyor belt 8 is provided at the bottom of the filter press box 2. The extension direction of the conveyor belt 8 is consistent with the extension direction of the frame 1. The conveyor belt 8 is used to collect and transport the solid drilling cuttings squeezed by the filter press box 2. The liquid and solid residues generated during the filtration can be transported and transferred separately to avoid the re-mixing of the liquid and solid after the filtration, which reduces the effect of the filtration.

[0028] The specific implementation process is as follows:

[0029] When the drilling cuttings are filtered, the pressure plate 3 pushes each filter press box 2 to move toward one end of the feed port 6, so that the filter press boxes 2 are closely arranged and the filter press boxes 2 are connected to each other through the connecting pipes 203. The feed port 6 injects drilling cuttings into the filter press box 2, and the drilling cuttings are filled between the filter press boxes 2 under the action of the connecting pipe 203. The inflation device inflates each air bag, so that the drilling cuttings between the filter press boxes 2 are filtered under the pressure of the air bags on both sides, and the moisture in the drilling cuttings enters the accommodating cavity in the filter press box 2 through the filter screen 202 and is discharged through the drainage hole. After the filtration is completed, each filter press box 2 moves to the side away from the feed port 6, so that the filter press boxes 2 are separated from each other, and the solid drilling cuttings remaining after the squeezing between the filter press boxes 2 fall on the conveyor belt 8 for transportation.

[0030] In this solution, when filtering drilling cuttings, the drilling cuttings are injected into multiple filter press boxes 2 and filtered by squeezing, so that the liquid in the drilling cuttings can be fully squeezed and filtered, ensuring that the solids and liquids in the drilling cuttings can be fully separated during the squeezing process, and ensuring that a large amount of drilling cuttings can be squeezed at the same time when the drilling cuttings are squeezed, ensuring the filtration efficiency of the drilling cuttings. In addition, during the filtration process, each filter press box 2 can automatically move on the frame 1, which is convenient for realizing the automatic operation of the filtration process and further improving the filtration efficiency of the drilling cuttings.

[0031] The above are only embodiments of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A sludge filter press device for water-based drilling cuttings disposal, characterized in that: It comprises a frame, on which a plurality of filter press boxes are arranged in sequence on the frame and are interconnected, and the filter press boxes can move along the extension direction of the frame; an air bag is provided in the filter press box, which is used to fill the drilling cuttings between adjacent filter press boxes, and the air bag is used to squeeze the drilling cuttings; the filter press box is connected to a drain pipe, and the drain pipe is used to output the filtered sewage; a conveyor belt is provided at the bottom of the filter press box, and the conveyor belt is used to collect and transport the solid drilling cuttings after the filtered sewage.

2. The sludge filter press device for water-based drilling cuttings disposal according to claim 1, characterized in that: Slide rails are laid on both sides of the frame, and the extension direction of the slide rails is consistent with the extension direction of the frame; a pressure plate is slidably connected to one end of the frame, and the pressure plate is connected to the slide rails, and the pressure plate can move along the extension direction of the frame.

3. The sludge filter press device for water-based drilling cuttings disposal according to claim 2, characterized in that: The plane where the pressure plate is located is parallel to the plane where the filter press box is located. One side of the pressure plate is in contact with the surface of the filter press box, and the other side is connected to the power component.

4. The sludge filter press device for water-based drilling cuttings disposal according to claim 1, characterized in that: A feed port is provided at one end of the frame, one end of the feed port is connected to a feed pipe, and the other end is connected to the filter press box, and the feed port is used to transport drilling cuttings into the filter press box.

5. The sludge filter press device for water-based drilling cuttings disposal according to claim 4, characterized in that: A baffle is provided at one end of the frame, the baffle is parallel to the filter press box, the feed inlet is located at the center of the baffle, and the feed inlet runs through both sides of the baffle.

6. The sludge filter press device for water-based drilling cuttings disposal according to claim 1, characterized in that: The filter press box comprises a frame body, filter screens are laid on both sides of the frame body, a connecting pipe is arranged at the center of the filter press box, and the connecting pipe is a hose, and is used to connect the two sides of the filter press box.

7. The sludge filter press device for water-based drilling cuttings disposal according to claim 6, characterized in that: Two layers of filter screens are arranged on both sides of the frame, and the two layers of filter screens are staggered and distributed with each other.

8. The sludge filter press device for water-based drilling cuttings disposal according to claim 6, characterized in that: A containing cavity is formed between the filter screens on both sides of the frame, the airbag is located in the containing cavity, and the air inlet of the airbag is communicated with the inflation device.

9. The sludge filter press device for water-based drilling cuttings disposal according to claim 6, characterized in that: A plurality of supporting protrusions are provided on both sides of the filter press box, and the plurality of supporting protrusions are evenly distributed along the circumference of one end of the connecting pipe, and the supporting protrusions protrude from the plane where the filter screen is located.

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