A drilling fluid micro-solid phase two-way separation device

Abstract

The utility model provides a kind of drilling fluid micro solid phase bidirectional separation device, belong to drilling fluid separation processing technical field, including rotary drum, the inside movable joint of rotary drum has inner cylinder, the left end of rotary drum is connected with feed pipe and penetrates, rotary drum and the right end fixed connection of inner cylinder have transmission, the left end of inner cylinder is connected with feed pipe and penetrates, rotary drum and inner cylinder between being equipped with separation zone, the outside fixed connection of inner cylinder has bidirectional spiral separation part.The utility model provides a kind of drilling fluid micro solid phase bidirectional separation device, by being equipped with bidirectional spiral separation part and inner cylinder, different density useful solid phase and harmful solid phase in drilling fluid can be bidirectional separation, realize harmful solid phase separation and useful solid phase recovery, and make drilling fluid under the action of centrifugal force can be relatively evenly distributed, avoid the uneven distribution of solid phase, liquid phase in drilling fluid to cause the situation that drilling fluid conveying efficiency reduces occurs.

Description

Technical Field

[0001] This utility model belongs to the field of drilling fluid separation and treatment technology, and more specifically, it relates to a drilling fluid micro-solid phase bidirectional separation device. Background Technology

[0002] Drilling fluid is a circulating working fluid used in the drilling process. Drilling fluid separation equipment is an indispensable component of the drilling operation system. Using a drilling fluid centrifuge to separate the solid phase after the drilling fluid vibrating screen is one of the main separation methods. The advantages of using a drilling fluid centrifuge for centrifugal separation are high efficiency, strong adaptability, high degree of automation, stable operation, and robust structure.

[0003] Existing drilling fluid centrifuges can only separate the liquid and solid phases in drilling fluid. However, in practice, the separated solid phases include useful solid phases containing barite and harmful solid phases containing clay and rock cuttings. Existing drilling fluid centrifuges cannot separate the useful solid phases from the harmful solid phases, resulting in the waste of the useful solid phases. Therefore, in order to address the deficiency of existing drilling fluid centrifuges in being unable to separate and recover the useful solid phase containing barite, this utility model discloses a drilling fluid micro-solid phase bidirectional separation device. Summary of the Invention

[0004] The purpose of this invention is to provide a drilling fluid micro-solid phase bidirectional separation device that can bidirectionally separate useful solid phases and harmful solid phases of different densities in drilling fluid, thereby achieving the separation of harmful solid phases and the recovery of useful solid phases.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a drilling fluid micro-solid phase bidirectional separation device is provided, including a rotating drum, an inner cylinder is movably connected inside the rotating drum, a feed pipe is connected through the left end of the rotating drum, a transmission device is fixedly connected to the right end of the rotating drum and the inner cylinder, the left end of the inner cylinder is connected through the feed pipe, a separation zone is provided between the rotating drum and the inner cylinder, and a bidirectional spiral separation part is fixedly connected to the outside of the inner cylinder, the bidirectional spiral separation part including a forward spiral blade and a reverse spiral blade fixedly connected to the outside of the inner cylinder.

[0006] Optionally, the thrusting diameter of the reverse helical blade is smaller than that of the forward helical blade. The thrusting diameter of the reverse helical blade is set to correspond to the low-density solid phase distribution region separated in the drilling fluid, and the thrusting diameter of the forward helical blade is set to correspond to the high-density solid phase distribution region separated in the drilling fluid.

[0007] Optionally, the rotating drum includes a stainless steel cylinder, a left end cap is fixedly connected to the left side of the stainless steel cylinder, a right end cap is fixedly connected to the right side of the stainless steel cylinder, a first solid phase outlet is provided on the right side of the outer side of the stainless steel cylinder, a second solid phase outlet is provided on the left side of the outer side of the stainless steel cylinder, and a liquid phase outlet is provided inside the right end cap.

[0008] Optionally, the feed pipe includes a tube that passes through and connects to the left end of the rotating drum and the inner cylinder, and a support is fixedly connected to the outside of the tube.

[0009] Optionally, the transmission device includes a first transmission end and a second transmission end. The first transmission end drives the rotating drum to rotate at a first speed via a first motor, and the second transmission end drives the inner cylinder to rotate at a second speed via a second motor. The first speed and the second speed are not equal.

[0010] Optionally, the inner cylinder includes a first inner cylinder unit movably connected to the outside of the support base, a second inner cylinder unit fixedly connected to the right side of the outside of the first inner cylinder unit, a third inner cylinder unit fixedly connected to the right side of the outside of the second inner cylinder unit, a conical diffuser fixedly connected to the inside of the first inner cylinder unit and the third inner cylinder unit, the small diameter end of the conical diffuser being connected to the first inner cylinder unit, the large diameter end of the conical diffuser being connected to the third inner cylinder unit, and a through hole communicating with the separation zone being provided on the outside of the third inner cylinder unit.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] The drilling fluid micro-solid phase bidirectional separation device provided by this utility model, compared with the prior art, can bidirectionally separate useful solid phases and harmful solid phases of different densities in the drilling fluid by providing a bidirectional spiral separation section and an inner cylinder, realizing the separation of harmful solid phases and the recovery of useful solid phases. In use, the drilling fluid enters the conical diffuser through the outlet hole on the wall of the inlet pipe. Simultaneously, the transmission device is activated to cause the rotating drum and the inner cylinder to rotate at different speeds. The rotation of the inner cylinder causes the drilling fluid entering the conical diffuser to diffuse under the action of centrifugal force, thereby allowing the drilling fluid to enter the third inner cylinder unit in a relatively uniform distribution. This avoids the situation where uneven distribution of solid and liquid phases in the drilling fluid leads to a decrease in drilling fluid delivery efficiency. Under centrifugal force, drilling fluid enters the rotating drum through the through-hole. The centrifugal force generated by the rotation of the drum causes substances of different densities in the drilling fluid to separate into layers. The most dense useful solid phase, including barite, is located in the outermost layer; the most dense harmful solid phase, including clay, rock cuttings, etc., is located in the middle layer; and the least dense liquid phase is located in the innermost layer. The rotation of the forward spiral blades drives the useful solid phase to move towards the second solid phase outlet and discharge it. The reverse spiral blades drive the harmful solid phase towards the first solid phase outlet and discharge it. The separated liquid phase is discharged through the liquid phase outlet, thus achieving the separation of useful and harmful solid phases. The useful solid phase can then be recovered, and the harmful solid phase can be treated to render it harmless. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the internal structure of the drilling fluid micro-solid phase bidirectional separation device provided in this embodiment of the utility model;

[0015] Figure 2 A schematic cross-sectional view of the rotating drum, feed pipe, inner cylinder, and bidirectional spiral separation section of the drilling fluid micro-solid phase bidirectional separation device provided in this embodiment of the utility model.

[0016] The following are the labeling elements in the figure:

[0017] 1. Rotating drum; 101. Stainless steel cylinder body; 102. Left end cover; 103. Second solid phase outlet; 104. First solid phase outlet; 105. Right end cover; 106. Liquid phase outlet; 2. Feed pipe; 201. Pipe body; 202. Support base; 3. Transmission device; 4. Inner cylinder body; 401. First inner cylinder unit; 402. Second inner cylinder unit; 403. Conical diffuser; 404. Through hole; 405. Third inner cylinder unit; 5. Bidirectional spiral separation section; 501. Forward spiral blade; 502. Reverse spiral blade; 6. Separation zone. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0020] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] Reference Figures 1 to 2The drilling fluid micro-solid phase bidirectional separation device provided in this utility model embodiment will now be described. The drilling fluid micro-solid phase bidirectional separation device includes a rotating drum 1, an inner cylinder 4 movably connected inside the rotating drum 1, a feed pipe 2 penetratingly connected to the left end of the rotating drum 1, a transmission device 3 fixedly connected to the right end of the rotating drum 1 and the inner cylinder 4, and a separation zone 6 provided between the rotating drum 1 and the inner cylinder 4. A bidirectional spiral separation part 5 is fixedly connected to the outside of the inner cylinder 4. The bidirectional spiral separation part 5 includes a forward spiral blade 501 and a reverse spiral blade 502 fixedly connected to the outside of the inner cylinder 4. The forward spiral blade 501 is used to drive the movement of the useful solid phase, and the reverse spiral blade 502 is used to drive the movement of the harmful solid phase.

[0023] Furthermore, the thrusting diameter of the reverse helical blade 502 is smaller than that of the forward helical blade 501. The thrusting diameter of the reverse helical blade 502 corresponds to the low-density solid phase distribution region separated in the drilling fluid, while the thrusting diameter of the forward helical blade 501 corresponds to the high-density solid phase distribution region separated in the drilling fluid. Both the forward and reverse helical blades 501 and 502 are made of stainless steel to extend their service life. The transmission device 3 is activated, causing the inner cylinder 4 to drive the forward and reverse helical blades 501 and 502... The spiral blades 502 rotate, and the rotation of the forward spiral blades 501 drives the useful solid phase to move towards the second solid phase outlet 103 and discharge it. The reverse spiral blades 502 are used to drive the harmful solid phase to move towards the first solid phase outlet 104 and discharge it, thereby achieving the separation of the useful solid phase and the harmful solid phase. Then the useful solid phase can be recovered and the harmful solid phase can be rendered harmless. It should be noted that the useful solid phase and the harmful solid phase cannot be completely separated. Instead, the proportion of the harmful solid phase in the separated useful solid phase is less than or equal to 5% to 10%.

[0024] Furthermore, the rotating drum 1 includes a stainless steel cylinder 101. A left end cap 102 is fixedly connected to the left side of the stainless steel cylinder 101, and a right end cap 105 is fixedly connected to the right side of the stainless steel cylinder 101. A first solid phase outlet 104 is provided on the right side of the outer side of the stainless steel cylinder 101, and a second solid phase outlet 103 is provided on the left side of the outer side of the stainless steel cylinder 101. A liquid phase outlet 106 is provided inside the right end cap 105. The first solid phase outlet 104 is used for the discharge of harmful solid phase, the second solid phase outlet 103 is used for the discharge of useful solid phase, and the separated liquid phase is discharged through the liquid phase outlet 106.

[0025] Furthermore, the feed pipe 2 includes a pipe body 201 that runs through and connects the left end of the rotating drum 1 and the inner cylinder 4. A support seat 202 is fixedly connected to the outside of the pipe body 201. The feed pipe 2 can rotate relative to the rotating drum 1 and the inner cylinder 4.

[0026] Furthermore, the transmission device 3 includes a first transmission end and a second transmission end. The first transmission end drives the rotating drum 1 to rotate at a first speed through a first motor, and the second transmission end drives the inner cylinder 4 to rotate at a second speed through a second motor. The first speed and the second speed are not equal. By making the rotating drum 1 and the inner cylinder 4 rotate at different speeds, the bidirectional spiral separation section 5 can drive the harmful solid phase and the useful solid phase to move.

[0027] Furthermore, the inner cylinder 4 includes a first inner cylinder unit 401 movably connected to the outside of the support base 202. A second inner cylinder unit 402 is fixedly connected to the right side of the outside of the first inner cylinder unit 401. A third inner cylinder unit 405 is fixedly connected to the right side of the outside of the second inner cylinder unit 402. A conical diffuser 403 is fixedly connected to the inner sides of the first inner cylinder unit 401 and the third inner cylinder unit 405. The small-diameter end of the conical diffuser 403 is connected to the first inner cylinder unit 401, and the large-diameter end of the conical diffuser 403 is connected to the third inner cylinder unit 405. The outer side of the third inner cylinder unit 405 is provided with a through hole 404 communicating with the separation zone 6. The drilling fluid enters the inner cylinder 4 through the feed pipe 2 and enters the separation zone 6 through the through hole 404 under the action of centrifugal force generated by the rotation of the inner cylinder 4. Under the action of centrifugal force generated by the rotation of the rotating drum 1, substances of different densities in the drilling fluid are centrifugally separated into layers. The outermost layer contains the densest useful solid phase, which includes barite; the middle layer contains the medium-density harmful solid phase, which includes clay, rock fragments, and other materials; and the innermost layer contains the least dense liquid phase. The diameters of the first inner cylinder unit 401, the second inner cylinder unit 402, and the third inner cylinder unit 405 are progressively larger. By setting up a multi-level inner cylinder body 4, suitable inner cylinder units can be matched according to the length and diameter specifications of the rotating drum 1. The outlet end of the feed pipe 2 extends into the interior of the conical diffuser 403. The pipe wall at the outlet end of the feed pipe 2 is provided with a discharge hole that communicates with the interior of the conical diffuser 403. The drilling fluid enters the interior of the conical diffuser 403 through the discharge hole on the pipe wall at the outlet end of the feed pipe 2 and diffuses, so that the drilling fluid can enter the third inner cylinder unit 405 in a relatively uniform distribution, avoiding the situation where the uneven distribution of solid and liquid phases in the drilling fluid causes a decrease in drilling fluid delivery efficiency. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drilling fluid micro-solid phase bidirectional separation device, comprising a rotating drum (1), characterized in that: The inner cylinder (4) is movably connected to the inside of the rotating drum (1). The left end of the rotating drum (1) is connected through a feed pipe (2). The right end of the rotating drum (1) and the inner cylinder (4) is fixedly connected to a transmission device (3). The left end of the inner cylinder (4) is connected through the feed pipe (2). A separation zone (6) is provided between the rotating drum (1) and the inner cylinder (4). A bidirectional spiral separation part (5) is fixedly connected to the outside of the inner cylinder (4). The bidirectional spiral separation part (5) includes a forward spiral blade (501) and a reverse spiral blade (502) fixedly connected to the outside of the inner cylinder (4).

2. The drilling fluid micro-solid phase bidirectional separation device as described in claim 1, characterized in that: The thrusting diameter of the reverse helical blade (502) is smaller than that of the forward helical blade (501). The thrusting diameter of the reverse helical blade (502) is set to correspond to the low-density solid phase distribution area separated in the drilling fluid, while the thrusting diameter of the forward helical blade (501) is set to correspond to the high-density solid phase distribution area separated in the drilling fluid.

3. The drilling fluid micro-solid phase bidirectional separation device as described in claim 1, characterized in that: The rotating drum (1) includes a stainless steel cylinder (101), a left end cap (102) is fixedly connected to the left side of the stainless steel cylinder (101), a right end cap (105) is fixedly connected to the right side of the stainless steel cylinder (101), a first solid phase outlet (104) is provided on the right side of the outer side of the stainless steel cylinder (101), a second solid phase outlet (103) is provided on the left side of the outer side of the stainless steel cylinder (101), and a liquid phase outlet (106) is provided inside the right end cap (105).

4. The drilling fluid micro-solid phase bidirectional separation device as described in claim 1, characterized in that: The feed pipe (2) includes a pipe body (201) that runs through the left end of the rotating drum (1) and the inner cylinder (4), and a support seat (202) is fixedly connected to the outside of the pipe body (201).

5. The drilling fluid micro-solid phase bidirectional separation device as described in claim 1, characterized in that: The transmission device (3) includes a first transmission end and a second transmission end. The first transmission end drives the rotating drum (1) to rotate at a first speed through a first motor. The second transmission end drives the inner cylinder (4) to rotate at a second speed through a second motor. The first speed and the second speed are not equal.

6. The drilling fluid micro-solid phase bidirectional separation device as described in claim 1, characterized in that: The inner cylinder (4) includes a first inner cylinder unit (401) movably connected to the outside of the support base (202). A second inner cylinder unit (402) is fixedly connected to the right side of the outside of the first inner cylinder unit (401). A third inner cylinder unit (405) is fixedly connected to the right side of the outside of the second inner cylinder unit (402). A conical diffuser (403) is fixedly connected to the inside of the first inner cylinder unit (401) and the third inner cylinder unit (405). The small diameter end of the conical diffuser (403) is connected to the first inner cylinder unit (401), and the large diameter end of the conical diffuser (403) is connected to the third inner cylinder unit (405). The outside of the third inner cylinder unit (405) is provided with a through hole (404) communicating with the separation zone (6).

Images