Solid-liquid separation device for oil field fracturing flow-back fluid

Abstract

The utility model relates to the technical field of solid-liquid separation devices, in particular to an oil field fracturing flow-back fluid solid-liquid separation device which comprises a tank body, a cavity is formed in the upper end of the tank body, a connecting block is fixedly connected to the left portion of the outer surface of the tank body, a cover plate is movably connected in the connecting block, and a separation mechanism is fixedly connected to the middle of the lower end of the tank body. The outer part of the lower end of the tank body is fixedly connected with three supporting legs, the right part of the lower end of the tank body is fixedly connected with a drainage pipe, the drainage pipe is of an L-shaped structure, and the drainage pipe, the separation mechanism and the three supporting legs are not in contact. According to the oil field fracturing flow-back fluid solid-liquid separation device, secondary separation can be avoided through the arranged separation mechanism, and the separation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-liquid separation devices, in particular to a solid-liquid separation device for oilfield fracturing return fluid. Background Art

[0002] Oilfield fracturing flowback fluid refers to a mixture of water and additives used in oilfield fracturing operations. It is injected into the underground rock formation at high pressure to increase the number and width of cracks, thereby promoting the production of oil and gas. After the fracturing operation is completed, the liquid and solid wastes generated need to be processed and recycled or discharged after treatment. These wastes are called fracturing flowback fluids. During the treatment of fracturing flowback fluids, solid-liquid separation devices are often used to separate solids and liquids. There are at least the following disadvantages in the use of existing solid-liquid separation devices: Most of the existing solid-liquid separation devices are through the setting of filter screens, but simple filter screen filtration will cause too much liquid residue in the filtered solids, thereby affecting the separation effect and causing the solids to need secondary separation. Therefore, we launched a solid-liquid separation device for oilfield fracturing flowback fluids. Utility Model Content

[0003] The main purpose of the utility model is to provide a solid-liquid separation device for oilfield fracturing return fluid, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The invention discloses a solid-liquid separation device for oilfield fracturing return fluid, comprising a tank body, wherein a cavity is opened at the upper end of the tank body, a connecting block is fixedly connected to the left part of the outer surface of the tank body, a cover plate is movably connected inside the connecting block, a separation mechanism is fixedly connected to the middle part of the lower end of the tank body, three supporting legs are fixedly connected to the outside of the lower end of the tank body, a drain pipe is fixedly connected to the right part of the lower end of the tank body, the drain pipe is an "L"-shaped structure, and there is no contact between the drain pipe, the separation mechanism and the three supporting legs.

[0006] Preferably, the separation mechanism includes a motor, the telescopic end of the motor is fixedly connected to a transmission rod, the upper end of the transmission rod is fixedly connected to a separation cylinder, the lower end and the outer surface of the separation cylinder are provided with a plurality of liquid outlet holes, the outer surface of the separation cylinder is fixedly connected to three stabilizing legs, the ends of the three stabilizing legs away from the separation cylinder are movably connected to rollers, and the three stabilizing legs are equidistantly distributed.

[0007] Preferably, a groove is formed on the inner wall of the tank.

[0008] Preferably, the three rollers are all located in the groove, the three rollers are all in contact with the inner wall of the groove, the motor is fixedly connected to the lower end of the tank body, the transmission rod is movably connected to the tank body through a bearing, and the separation cylinder is located in the tank body.

[0009] Preferably, a connecting piece is fixedly connected to the left portion of the outer surface of the cover plate, and the connecting piece is an "L"-shaped structure. An anti-overflow ring is fixedly connected to the middle portion of the lower end of the cover plate, and a feeding port is fixedly connected to the upper end of the cover plate, and the feeding port is a structure that is wide at the top and narrow at the bottom.

[0010] Preferably, the connecting member is movably connected to the connecting block via a rotating shaft, the position of the anti-overflow ring corresponds to the position of the separation cylinder, and the anti-overflow ring is located outside the separation cylinder.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. By setting up the separation mechanism, cover the cover plate, align the feed port with the separation cylinder, and the anti-overflow ring is located outside the separation cylinder, pour the return liquid into the separation cylinder through the feed port, the solid is in the separation cylinder, and the liquid is discharged through the liquid outlet hole, and then start the motor to drive the transmission rod and the separation cylinder to rotate. During the rotation of the separation cylinder, under the action of centrifugal force, the liquid remaining in the solid matter in the separation cylinder will separate from the solid matter and be discharged through the liquid outlet hole, avoiding secondary separation and improving the separation efficiency. After the separation is completed, open the cover plate to clean the solid matter in the separation cylinder;

[0013] 2. By arranging three rollers on the outer surface of the separation cylinder, the three rollers roll in the grooves during the rotation of the separation cylinder. The three rollers cooperate with three stabilizing legs to improve the stability of the separation cylinder during rotation and avoid shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model oilfield fracturing flowback fluid solid-liquid separation device;

[0015] Figure 2 It is a schematic diagram of the tank cross-section structure of the utility model oilfield fracturing flowback fluid solid-liquid separation device;

[0016] Figure 3 This is a schematic diagram of the overall structure of the separation mechanism of the oilfield fracturing flowback fluid solid-liquid separation device of the utility model;

[0017] Figure 4 The utility model is a schematic diagram of the overall structure of the cover plate of the oilfield fracturing return fluid solid-liquid separation device.

[0018] In the figure: 1. tank body; 2. cavity; 3. cover plate; 4. connecting block; 5. separation mechanism; 6. drain pipe; 7. supporting leg; 11. groove; 31. anti-overflow ring; 32. connecting piece; 33. feeding port; 51. motor; 52. separation cylinder; 53. liquid outlet; 54. stabilizing leg; 55. roller; 56. transmission rod. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-4 , the utility model provides a technical solution:

[0023] The invention discloses a solid-liquid separation device for oilfield fracturing return fluid, comprising a tank body 1, a cavity 2 is opened at the upper end of the tank body 1, a connecting block 4 is fixedly connected to the left part of the outer surface of the tank body 1, a cover plate 3 is movably connected inside the connecting block 4, a separation mechanism 5 is fixedly connected to the middle part of the lower end of the tank body 1, three supporting legs 7 are fixedly connected to the outside of the lower end of the tank body 1, a drain pipe 6 is fixedly connected to the right part of the lower end of the tank body 1, the drain pipe 6 is an "L"-shaped structure, and the drain pipe 6, the separation mechanism 5 and the three supporting legs 7 are not in contact with each other.

[0024] In this embodiment, the separation mechanism 5 includes a motor 51, a transmission rod 56 is fixedly connected to the telescopic end of the motor 51, a separation cylinder 52 is fixedly connected to the upper end of the transmission rod 56, a plurality of liquid outlet holes 53 are provided at the lower end and the outer surface of the separation cylinder 52, three stabilizing legs 54 are fixedly connected to the outer surface of the separation cylinder 52, and the ends of the three stabilizing legs 54 away from the separation cylinder 52 are movably connected to rollers 55, and the three stabilizing legs 54 are equidistantly distributed; a groove 11 is provided on the inner wall of the tank body 1; the three rollers 55 are all located in the groove 11, and the three rollers 55 are in contact with the inner wall of the groove 11; the motor 51 is fixedly connected to the lower end of the tank body 1, and the transmission rod 56 is connected to the outer surface of the separation cylinder 52. It is movably connected to the tank body 1 through a bearing, and the separation cylinder 52 is located inside the tank body 1; a connecting piece 32 is fixedly connected to the left part of the outer surface of the cover plate 3, and the connecting piece 32 is an "L"-shaped structure. An anti-overflow ring 31 is fixedly connected to the middle part of the lower end of the cover plate 3, and a feeding port 33 is fixedly connected to the upper end of the cover plate 3, and the feeding port 33 is a structure that is wide at the top and narrow at the bottom; the connecting piece 32 is movably connected to the connecting block 4 through a rotating shaft, and the position of the anti-overflow ring 31 corresponds to the position of the separation cylinder 52. The anti-overflow ring 31 is located outside the separation cylinder 52, and the three rollers 55 cooperate with the three stabilizing legs 54 to improve the stability of the separation cylinder 52 during rotation. The surface separation cylinder 52 shakes unsteadily during rotation.

[0025] It should be noted that the utility model is a solid-liquid separation device for oilfield fracturing return fluid. During use, the cover plate 3 is covered, at this time, the feed port 33 is aligned with the separation barrel 52, and the anti-overflow ring 31 is located outside the separation barrel 52, and the return fluid is poured into the separation barrel 52 through the feed port 33. The solid is in the separation barrel 52, and the liquid is discharged through the liquid outlet 53. The motor 51 is started by an external control system to drive the transmission rod 56 and the separation barrel 52 to rotate. During the rotation of the separation barrel 52, under the action of centrifugal force, the liquid remaining in the solid matter in the separation barrel 52 will separate from the solid matter and be discharged through the liquid outlet 53, avoiding secondary separation and improving the separation efficiency. After the separation is completed, the cover plate 3 is opened to clean the solid matter in the separation barrel 52. During the rotation of the separation barrel 52, the three rollers 55 roll in the groove 11. The three rollers 55 cooperate with the three stabilizing legs 54 to improve the stability of the separation barrel 52 during rotation and avoid shaking.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A solid-liquid separation device for oilfield fracturing flowback fluid, comprising a tank body (1), characterized in that: The upper end of the tank body (1) is provided with a cavity (2); a connection block (4) is fixedly connected to the left portion of the outer surface of the tank body (1); a cover plate (3) is movably connected inside the connection block (4); a separation mechanism (5) is fixedly connected to the middle portion of the lower end of the tank body (1); three supporting legs (7) are fixedly connected to the outside of the lower end of the tank body (1); a drainage pipe (6) is fixedly connected to the right portion of the lower end of the tank body (1); the drainage pipe (6) is an "L"-shaped structure; the drainage pipe (6), the separation mechanism (5) and the three supporting legs (7) are not in contact with each other; The separation mechanism (5) comprises a motor (51), the telescopic end of the motor (51) is fixedly connected to a transmission rod (56), the upper end of the transmission rod (56) is fixedly connected to a separation cylinder (52), the lower end and the outer surface of the separation cylinder (52) are both provided with a plurality of liquid outlet holes (53), the outer surface of the separation cylinder (52) is fixedly connected to three stabilizing legs (54), the ends of the three stabilizing legs (54) away from the separation cylinder (52) are all movably connected to rollers (55), and the three stabilizing legs (54) are equidistantly distributed.

2. The oilfield fracturing flowback fluid solid-liquid separation device according to claim 1, characterized in that: The inner wall of the tank body (1) is provided with a groove (11).

3. The oilfield fracturing flowback fluid solid-liquid separation device according to claim 1, characterized in that: The three rollers (55) are all located in the groove (11), and the three rollers (55) are all in contact with the inner wall of the groove (11); the motor (51) is fixedly connected to the lower end of the tank body (1); the transmission rod (56) is movably connected to the tank body (1) via a bearing; and the separation cylinder (52) is located in the tank body (1).

4. The oilfield fracturing flowback fluid solid-liquid separation device according to claim 1, characterized in that: A connecting piece (32) is fixedly connected to the left portion of the outer surface of the cover plate (3), and the connecting piece (32) is an "L"-shaped structure. An anti-overflow ring (31) is fixedly connected to the middle portion of the lower end of the cover plate (3), and a feeding port (33) is fixedly connected to the upper end of the cover plate (3), and the feeding port (33) is a structure that is wide at the top and narrow at the bottom.

5. The oilfield fracturing flowback fluid solid-liquid separation device according to claim 4, characterized in that: The connecting member (32) is movably connected to the connecting block (4) via a rotating shaft; the position of the anti-overflow ring (31) corresponds to the position of the separation cylinder (52); and the anti-overflow ring (31) is located outside the separation cylinder (52).

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