Oil-water well acidification augmented injection flowback device

Abstract

The utility model relates to the technical field of oil-water well development, in particular to an oil-water well acidification augmented injection flowback device. The oil-water well acidification augmented injection flowback device comprises a sleeve and an acid injection pipe arranged in the sleeve, and a plurality of liquid pumping holes are evenly formed in the sleeve; the supporting frame is arranged on the ground of the oil-water well, a winch is arranged at the top end of the supporting frame, a lifting plate is fixedly installed on a traction steel rope of the winch, the acid injection pipe is sleeved with the lifting plate in a sliding mode, a suction filter is arranged on the lifting plate, the liquid inlet end of the suction filter communicates with a plurality of liquid suction pipes, and sleeves communicating with the liquid suction holes are arranged on the liquid suction pipes; the transfer box is arranged on the supporting frame, the transfer box is communicated with the liquid outlet end of the suction filtration machine through a guide pipe, and a first chemical adding pipe and a second chemical adding pipe are installed on the two sides of the transfer box respectively; and the positioning mechanism is arranged on the lifting plate. The acidification augmented injection flowback device for the oil-water well has the advantages of being accurate in butt joint and more comprehensive in acid liquor treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and water well development, in particular to an oil and water well acidification injection and flowback device. Background Art

[0002] Acidizing refers to the process of restoring or improving the permeability of formation pores and fractures by dissolving and corroding rock cements or blockages in formation pores and fractures with acid. Acidizing can be divided into pickling, matrix acidizing and fracturing acidizing according to different processes. Pickling is to inject a small amount of acid into the wellbore to remove acid-soluble particles, cuttings and scale in the wellbore holes, and dredge the perforation holes. Matrix acidizing is to inject acid into the formation at a pressure lower than the rock fracture pressure, and rely on the dissolution of acid to restore or improve the permeability of the oil layer in a large range near the wellbore. Fracturing acidizing is to inject acid into the formation at a pressure higher than the rock fracture pressure to form fractures in the formation, and form high-conductivity fractures through uneven dissolution of the fracture wall material by acid. Acidizing relies on acid to dissolve the formation rock, improve the oil flow channel, and increase the oil well production. Different formation rocks require different acids. For example, hydrochloric acid has a good treatment effect on limestone, and soil acid has a good treatment effect on sandstone.

[0003] When oil and water wells are acidified and injected, acid backflow will occur. It is necessary to discharge the backflow acid in time to prevent soil pollution. The publication number CN205330619U discloses an oil and water well acidification backflow device. The utility model relates to the technical field of oilfield development; it also includes a filter, an acid extraction hole, an acid extraction pipe, a filter fixing frame, a connecting steel cable, a rotating wheel, a transmission rope, and a winch; the filter is arranged on one side of the filter fixing frame, the filter fixing frame is sleeved on the outside of the acid injection pipe, the upper part of the filter fixing frame is provided with a connecting steel cable, the upper part of the connecting steel cable is connected to the transmission rope through the rotating wheel, and the transmission rope is connected to the winch; the bottom of the filter is provided with an acid extraction pipe; the bottom end of the acid extraction pipe is arranged corresponding to the acid extraction hole on the sleeve. It can greatly improve the flowback efficiency, avoid secondary pollution of the formation by residual acid, improve the efficiency of acidizing measures, improve the economic benefits of oil wells, and is more practical. However, when the acid extraction pipe is connected to the acid extraction hole downward, there is an inaccurate connection, which affects the extraction efficiency.

[0004] Therefore, it is necessary to provide a new oil and water well acidizing injection and flowback device to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an oil and water well acidizing injection and flowback device with precise docking and more comprehensive acid treatment.

[0006] The utility model provides an oil-water well acidizing injection and flowback device comprising: a sleeve, and an acid injection pipe arranged in the sleeve, wherein a plurality of liquid extraction holes are evenly opened on the sleeve;

[0007] A support frame is arranged on the surface of the oil and water well, and a winch is arranged on the top of the support frame, a lifting plate is fixedly installed on the traction steel rope of the winch, the lifting plate is slidably sleeved on the acid injection pipe, and a suction filter is arranged on the lifting plate, the liquid inlet end of the suction filter is connected with a plurality of liquid extraction pipes, and the liquid extraction pipes are provided with casings connected with the liquid extraction holes;

[0008] A transfer box is arranged on the support frame, and the transfer box is connected with the liquid outlet of the suction filter through a conduit, and a first dosing pipe and a second dosing pipe are respectively installed on both sides of the transfer box;

[0009] A positioning mechanism is arranged on the lifting plate, and the positioning mechanism includes a hydraulic rod, the hydraulic rod is fixedly installed on the lifting plate, and a connecting block is fixedly installed on the telescopic end of the hydraulic rod, a transmission rod is hinged on the connecting block, and a positioning piece that is clamped with the liquid extraction hole is installed on the end of the transmission rod away from the connecting block.

[0010] Preferably, protrusions are provided on both sides of the lifting plate, and grooves that slide with the protrusions are provided on the inner side of the sleeve.

[0011] Preferably, a neutralizing agent box is provided above the dosing tube 1, the neutralizing agent box is fixedly installed on the support frame, and a flow valve 1 connected to the dosing tube 1 is provided at the bottom end of the neutralizing agent box, and a control valve is provided at the end of the dosing tube 1 away from the transfer box.

[0012] Preferably, an acidifying agent box is provided above the second dosing tube, the acidifying agent box is fixedly mounted on the support frame, and a flow valve second connected to the second dosing tube is provided at the bottom end of the acidifying agent box, a sealing plug is installed at the end of the second dosing tube facing away from the transfer box, a return liquid pipe connected to the acid injection pipe is provided on the transfer box, and the top end of the return liquid pipe is higher than the top of the transfer box.

[0013] Preferably, a pH detection sensor is installed on the transfer box.

[0014] Preferably, a transmission shaft is rotatably mounted on the sealing plug, one end of the transmission shaft away from the sealing plug extends into a dosing tube, a plurality of stirring rods are evenly mounted on the transmission shaft, and a servo motor for driving the transmission shaft to rotate is mounted on the support frame.

[0015] Preferably, the positioning member includes a telescopic frame, which is slidably mounted on a lifting plate, the top of the telescopic frame is hinged to a transmission rod, a connecting rod is slidably mounted on the front end of the telescopic frame, a U-shaped frame is fixedly mounted on one end of the connecting rod away from the telescopic frame, a ball is rotatably mounted on the U-shaped frame, the diameter of the ball is larger than the diameter of the liquid extraction hole, an extrusion spring is symmetrically mounted on the U-shaped frame, one end of the extrusion spring away from the U-shaped frame is fixedly connected to the telescopic frame, and the distance between the axis of the ball and the bottom end of the sleeve is equal to the distance between two vertically adjacent liquid extraction holes.

[0016] Compared with the related art, the oil and water well acidizing injection and flowback device provided by the utility model has the following beneficial effects:

[0017] 1. The utility model provides an oil and water well acidification injection and flowback device, by arranging a positioning mechanism on a lifting plate slidably mounted on an acid injection pipe, the positioning mechanism uses a hydraulic rod, a connecting block, a transmission rod, a positioning piece, a telescopic frame, a connecting rod, a U-shaped frame, a ball and an extrusion spring to facilitate docking with the liquid extraction hole when the filter machine descends to extract liquid;

[0018] 2. By setting up a transfer box to receive the return liquid extracted by the filter, the return liquid can be neutralized by adding chemicals in the neutralization agent box and discharged safely after deacidification. The return liquid can also be acidified by the acidification agent box and then injected a second time, which is convenient for flexible use of the return liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a preferred embodiment of the oil-water well acidification injection and flowback device provided by the utility model;

[0020] Figure 2 A schematic structural diagram of the oil-water well acidification injection and flowback device provided by the utility model from another perspective;

[0021] Figure 3 A schematic diagram of the structure of removing the sleeve of the oil and water well acidification injection and flowback device provided by the utility model;

[0022] Figure 4 A schematic diagram of the structure of the sleeve provided by the utility model;

[0023] Figure 5 A schematic diagram of the structure of the transfer box provided by the utility model;

[0024] Figure 6 for Figure 2 A partial enlarged view of A shown.

[0025] Numbers in the figure: 1. sleeve; 101. extraction hole; 102. groove; 2. acid injection pipe; 3. support frame; 31. winch; 4. lifting plate; 41. protrusion; 5. filter; 51. extraction pipe; 52. sleeve; 6. transfer box; 61. dosing pipe 1; 62. dosing pipe 2; 63. return pipe; 64. PH detection sensor; 7. positioning mechanism; 71. hydraulic rod; 72. connecting block; 73. transmission rod; 74. positioning piece; 741. telescopic frame; 742. connecting rod; 743. U-shaped frame; 744. ball; 745. extrusion spring; 8. neutralization agent box; 81. flow valve 1; 82. control valve; 9. acidification agent box; 91. flow valve 2; 92. sealing plug; 93. transmission shaft; 94. stirring rod; 95. servo motor. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0028] See also Figures 1 to 6 The utility model provides an oil-water well acidizing injection and flowback device, and the oil-water well acidizing injection and flowback device comprises:

[0029] A sleeve 1, and an acid injection tube 2 arranged in the sleeve 1, wherein a plurality of liquid extraction holes 101 are evenly opened on the sleeve 1;

[0030] A support frame 3 is arranged on the surface of the oil and water well, and a winch 31 is arranged on the top of the support frame 3, a lifting plate 4 is fixedly installed on the traction rope of the winch 31, the lifting plate 4 is slidably sleeved on the acid injection pipe 2, and a suction filter 5 is arranged on the lifting plate 4, and a plurality of liquid extraction pipes 51 are connected to the liquid inlet end of the suction filter 5, and a casing 52 connected to the liquid extraction hole 101 is arranged on the liquid extraction pipe 51;

[0031] The transfer box 6 is arranged on the support frame 3, and the transfer box 6 is connected with the liquid outlet of the suction filter 5 through a conduit, and a dosing pipe 1 61 and a dosing pipe 2 62 are respectively installed on both sides of the transfer box 6;

[0032] The positioning mechanism 7 is arranged on the lifting plate 4, and the positioning mechanism 7 includes a hydraulic rod 71, the hydraulic rod 71 is fixedly installed on the lifting plate 4, and the telescopic end of the hydraulic rod 71 is fixedly installed with a connecting block 72, and a transmission rod 73 is hinged on the connecting block 72. The end of the transmission rod 73 away from the connecting block 72 is installed with a positioning piece 74 that is clamped with the liquid extraction hole 101.

[0033] The positioning member 74 includes a telescopic frame 741, which is slidably installed on the lifting plate 4. The top of the telescopic frame 741 is hinged to the transmission rod 73. A connecting rod 742 is slidably installed on the front end of the telescopic frame 741. A U-shaped frame 743 is fixedly installed on the end of the connecting rod 742 away from the telescopic frame 741. A ball 744 is rotatably installed on the U-shaped frame 743. The diameter of the ball 744 is larger than the diameter of the liquid extraction hole 101. An extrusion spring 745 is symmetrically installed on the U-shaped frame 743. The end of the extrusion spring 745 away from the U-shaped frame 743 is fixedly connected to the telescopic frame 741, and the distance between the axis of the ball 744 and the bottom end of the sleeve 52 is equal to the distance between two vertically adjacent liquid extraction holes 101.

[0034] It should be noted that: when in use, when it is necessary to adjust the position of the filter 5, the hydraulic rod 71 is first controlled to retract, thereby driving the connecting block 72 away from the acid injection pipe 2, and the transmission rod 73 is used to drive the telescopic frame 741 to pull the U-shaped frame 743 through the extrusion spring 745 to drive the ball 744 to withdraw from the liquid extraction hole 101, and then the winch 31 is controlled to unwind, and the lifting plate 4 is adjusted to slide along the acid injection pipe 2 until the ball 744 moves to the next liquid extraction hole 101. At this time, the sleeve 52 Align with the next vertically adjacent liquid extraction hole 101 (achieved by adapting the spacing between the ball 744 and the sleeve 52 to the spacing between the two vertically adjacent liquid extraction holes 101), then control the hydraulic rod 71 to extend, thereby driving the telescopic frame 741 to extend through the connecting block 72 and the transmission rod 73, inserting the ball 744 into the liquid extraction hole 101, completing the positioning, and then start the filter 5 to extract the return liquid through the liquid extraction pipe 51, discharge the return liquid into the transfer box 6, and discharge it after being processed through the transfer box 6.

[0035] It is worth noting that: the positioning piece 74 is used for positioning here, and the spacing between the ball 744 and the sleeve 52 is adapted to the spacing between two vertically adjacent pumping holes 101, so that when it is necessary to move downward, when the ball 744 contacts the next pumping hole 101, the sleeve 52 is aligned with the adjacent lower pumping hole 101, which is convenient for positioning and pumping. The hydraulic rod 71 here controls the extension and retraction of the hydraulic rod 71 by setting a hydraulic pump and a hydraulic valve, thereby achieving positioning. The specific working principles of the hydraulic rod 71 are all existing technologies and will not be described in detail here.

[0036] In the embodiments of the present invention, please refer to Figures 1 to 6 , protrusions 41 are provided on both sides of the lifting plate 4, and a groove 102 that slides with the protrusions 41 is provided on the inner side of the sleeve 1;

[0037] It should be noted that when the lifting plate 4 moves along the acid injection tube 2, the cooperation between the protrusion 41 and the groove 102 can enable the lifting plate 4 to move only in the vertical direction without rotating, so that the liquid extraction tube 51 can be accurately vertically aligned with the liquid extraction hole 101 when moving downward.

[0038] In the embodiments of the present invention, please refer to Figures 1 to 6 A neutralizing agent box 8 is provided above the dosing tube 61, and the neutralizing agent box 8 is fixedly installed on the support frame 3, and a flow valve 81 connected to the dosing tube 61 is provided at the bottom end of the neutralizing agent box 8, and a control valve 82 is provided at the end of the dosing tube 61 away from the transfer box 6;

[0039] It should be noted that when drainage is required, the control valve 82 is opened, and the flow valve 81 is started to discharge the alkaline agent in the neutralizing agent box 8 into the dosing pipe 61, so as to acidify and neutralize the return liquid flowing through, thereby reducing the acid pollution to the soil layer.

[0040] In the embodiments of the present invention, please refer to Figures 1 to 6 An acidifying agent box 9 is provided above the second dosing pipe 62, and the acidifying agent box 9 is fixedly installed on the support frame 3, and a flow valve 91 connected to the second dosing pipe 62 is provided at the bottom end of the acidifying agent box 9, and a sealing plug 92 is installed at one end of the second dosing pipe 62 away from the transfer box 6, and a liquid return pipe 63 connected to the acid injection pipe 2 is provided on the transfer box 6, and the top of the liquid return pipe 63 is higher than the top of the transfer box 6;

[0041] It should be noted that: when secondary acidification and injection are required, the control valve 82 is closed, and then the flow valve 2 91 is started to inject the acid in the acidification agent box 9 into the dosing pipe 2 62, and then the filtered return liquid is secondary acidified and re-injected into the acid injection pipe 2 through the return pipe 63 to perform secondary acidification and injection. Here, the power for secondary acidification and injection is continuous pumping through the suction filter 5, so that the return liquid is secondary acidified and returned from the return pipe 63 into the acid injection pipe 2 for cyclic acidification;

[0042] In the present embodiment, a pH detection sensor 64 is installed on the transfer box 6, so that the acidity of the filtered return liquid is detected by the pH detection sensor 64 to control the amount of medicine added to the neutralization agent box 8 during neutralization, and to control the amount of medicine added to the acidification agent box 9 during acidification, thereby realizing accurate addition of medicines.

[0043] In the embodiments of the present invention, please refer to Figures 1 to 6 A transmission shaft 93 is rotatably mounted on the sealing plug 92, and one end of the transmission shaft 93 away from the sealing plug 92 extends into the dosing tube 61, and a plurality of stirring rods 94 are evenly mounted on the transmission shaft 93. A servo motor 95 for driving the transmission shaft 93 to rotate is mounted on the support frame 3;

[0044] It should be noted that: when adding medicine, the servo motor 95 is controlled to drive the transmission shaft 93 to rotate, thereby driving a plurality of stirring rods 94 to stir the flowing liquid to accelerate the fusion of the medicine, so as to facilitate the treatment of the return liquid.

[0045] The working principle of the oil and water well acidification injection and flowback device provided by the utility model is as follows:

[0046] When in use, when it is necessary to adjust the position of the filter 5, first control the hydraulic rod 71 to retract, thereby driving the connecting block 72 away from the acid injection pipe 2, and through the transmission rod 73, drive the telescopic frame 741 to pull the U-shaped frame 743 through the extrusion spring 745 to drive the ball 744 to withdraw from the liquid extraction hole 101, and then control the winch 31 to unwind, adjust the lifting plate 4 to slide along the acid injection pipe 2 until the ball 744 moves to the next liquid extraction hole 101, at this time, the sleeve 52 is vertically opposite to the vertical axis. The next adjacent liquid extraction hole 101 is aligned (this is achieved by matching the spacing between the ball 744 and the sleeve 52 with the spacing between the two vertically adjacent liquid extraction holes 101), and then the hydraulic rod 71 is controlled to extend, thereby driving the telescopic frame 741 to extend through the connecting block 72 and the transmission rod 73, and inserting the ball 744 into the liquid extraction hole 101 to complete the positioning, and then the filter 5 is started to extract the return liquid through the liquid extraction pipe 51, and the return liquid is discharged into the transfer box 6, and then discharged after being processed by the transfer box 6;

[0047] When it is necessary to drain the liquid, open the control valve 82, start the flow valve 81 to discharge the alkaline agent in the neutralizing agent box 8 into the dosing pipe 61, and acidify and neutralize the return liquid flowing through to reduce the pollution of the acid to the soil layer; when secondary acidification and injection are required, close the control valve 82, and then start the flow valve 91 to inject the acid in the acidifying agent box 9 into the dosing pipe 62, and then the filtered return liquid is acidified for the second time and then re-injected into the acid injection pipe 2 through the return pipe 63 for secondary acidification and injection.

[0048] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0049] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An oil and water well acidizing injection and flowback device, comprising: A sleeve (1), and an acid injection tube (2) arranged in the sleeve (1), wherein a plurality of liquid extraction holes (101) are evenly arranged on the sleeve (1); It is characterized by further comprising: A support frame (3) is arranged on the surface of an oil and water well, and a winch (31) is provided at the top of the support frame (3). A lifting plate (4) is fixedly mounted on the traction steel rope of the winch (31). The lifting plate (4) is slidably sleeved on the acid injection pipe (2), and a suction filter (5) is arranged on the lifting plate (4). The liquid inlet end of the suction filter (5) is connected to a plurality of liquid extraction pipes (51), and the liquid extraction pipe (51) is provided with a casing (52) connected to the liquid extraction hole (101); A transfer box (6) is arranged on the support frame (3), and the transfer box (6) is connected to the liquid outlet of the suction filter (5) through a conduit, and a first dosing pipe (61) and a second dosing pipe (62) are respectively installed on both sides of the transfer box (6); A positioning mechanism (7) is arranged on the lifting plate (4), and the positioning mechanism (7) comprises a hydraulic rod (71), the hydraulic rod (71) is fixedly mounted on the lifting plate (4), and a connecting block (72) is fixedly mounted on the telescopic end of the hydraulic rod (71), a transmission rod (73) is hingedly connected to the connecting block (72), and a positioning piece (74) that is engaged with the liquid extraction hole (101) is mounted on one end of the transmission rod (73) that is away from the connecting block (72).

2. The oil-water well acidification injection and flowback device according to claim 1, characterized in that: The lifting plate (4) is provided with protrusions (41) on both sides, and the inner side of the sleeve (1) is provided with grooves (102) that are slidably matched with the protrusions (41).

3. The oil-water well acidizing injection and flowback device according to claim 1, characterized in that: A neutralizing agent box (8) is provided above the dosing tube (61), the neutralizing agent box (8) is fixedly mounted on the support frame (3), and a flow valve (81) communicating with the dosing tube (61) is provided at the bottom end of the neutralizing agent box (8), and a control valve (82) is provided at one end of the dosing tube (61) facing away from the transfer box (6).

4. The oil-water well acidizing injection and flowback device according to claim 1, characterized in that: An acidifying agent box (9) is provided above the second dosing pipe (62). The acidifying agent box (9) is fixedly mounted on the support frame (3), and a flow valve (91) communicating with the second dosing pipe (62) is provided at the bottom end of the acidifying agent box (9). A sealing plug (92) is installed at one end of the second dosing pipe (62) away from the transfer box (6). A liquid return pipe (63) communicating with the acid injection pipe (2) is provided on the transfer box (6), and the top end of the liquid return pipe (63) is higher than the top of the transfer box (6).

5. The oil-water well acidizing injection and flowback device according to claim 4, characterized in that: The transfer box (6) is provided with a pH detection sensor (64).

6. The oil-water well acidizing injection and flowback device according to claim 4, characterized in that: A transmission shaft (93) is rotatably mounted on the sealing plug (92); one end of the transmission shaft (93) facing away from the sealing plug (92) extends into the dosing pipe (61); a plurality of stirring rods (94) are evenly mounted on the transmission shaft (93); and a servo motor (95) for driving the transmission shaft (93) to rotate is mounted on the support frame (3).

7. The oil-water well acidizing injection and flowback device according to claim 1, characterized in that: The positioning member (74) comprises a telescopic frame (741), the telescopic frame (741) being slidably mounted on the lifting plate (4), the top end of the telescopic frame (741) being hinged to the transmission rod (73), the front end of the telescopic frame (741) being slidably mounted with a connecting rod (742), one end of the connecting rod (742) being away from the telescopic frame (741) being fixedly mounted with a U-shaped frame (743), a ball (744) being rotatably mounted on the U-shaped frame (743), the diameter of the ball (744) being larger than the diameter of the liquid extraction hole (101), an extrusion spring (745) being symmetrically mounted on the U-shaped frame (743), one end of the extrusion spring (745) being away from the U-shaped frame (743) being fixedly connected to the telescopic frame (741), and the distance between the axis of the ball (744) and the bottom end of the sleeve (52) being equal to the distance between two vertically adjacent liquid extraction holes (101).

Images