Oil field acidizing plug removal liquid matching adding device

Abstract

The utility model relates to oilfield equipment maintenance technical field, concretely is oilfield acidification and is matched with the adding device of unblocking liquid, including the cylinder fixedly installed in the top of support frame, the top of support frame is fixedly installed with mounting bracket, the top of support frame is fixedly installed with fixed block, the inboard loose joint of piston has in the cylinder, the top of piston is fixedly installed with piston rod, the top of cylinder is fixedly installed with liquid suction pipe and liquid outlet pipe respectively, the below of support frame is provided with local oilfield equipment. When the acidification and unblocking liquid liquid level in local oilfield equipment gradually reduces, the square bar and the conductive rod will be driven by the float ball to move downward, when the conductive rod is connected with the contact switch joint, a closed circuit is formed, the alarm sends out the alarm to remind staff to add acidification and unblocking liquid, can realize the purpose of automatic filling acidification and unblocking liquid and filling in place stop, also can remind staff to fill the operation when the acidification and unblocking liquid remains a small amount.

Description

Technical Field

[0001] This utility model relates to the field of oilfield equipment maintenance technology, specifically to a device for adding oilfield acid-dissolving and unblocking fluid. Background Technology

[0002] During oilfield development, factors such as reservoir sensitivity minerals, reservoir permeability, rock surface properties, reservoir fluid properties, reservoir temperature, and pressure can easily lead to reduced reservoir permeability due to external conditions, resulting in decreased oilfield production. Injecting acid to dissolve blockage fluid is an effective measure to restore oil and gas well productivity. Through the chemical dissolution effect of acid, formation blockages are dissolved, formation fractures are enlarged or extended, thereby restoring and improving formation permeability, reducing oil inflow resistance or water injection resistance, and thus achieving the goal of increasing oil well production and water well injection.

[0003] In the prior art, such as the "Automatic Addition Device for Acidizing and Unblocking Fluid in Oilfields" with Chinese Patent Publication No. CN212508221U, this utility model uses a motor to drive a threaded rod to rotate, which in turn drives a threaded sleeve to rotate and move downward in a vertical rod, thereby spraying the acidizing and unblocking fluid from the injection nozzle, thus achieving the purpose of automatic addition with high accuracy.

[0004] While the aforementioned existing technologies can achieve automatic addition and reduce human error, they cannot automatically stop injection after addition. Furthermore, they cannot issue an alarm to remind staff to add more acid solution after the acid solution in the oilfield equipment has been used up, and cannot add acid solution in a timely manner for use. Utility Model Content

[0005] The purpose of this invention is to provide a matching addition device for acid-dissolving and unblocking fluid in oil fields, which features automatic stop when the acid-dissolving and unblocking fluid is full and an alarm when the acid-dissolving and unblocking fluid is insufficient.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an oilfield acidizing and unblocking fluid addition device, comprising a cylinder fixedly installed on the top of a support frame, an installation frame fixedly installed on the top of the support frame, a fixing block fixedly installed on the top of the support frame, a piston movably sleeved on the inner side of the cylinder, a piston rod fixedly installed on the top of the piston, a suction pipe and a discharge pipe fixedly installed on the top of the cylinder respectively, and local oilfield equipment arranged below the support frame;

[0007] A scale is fixedly installed on the top of the fixed block, a positioning mark is slidably sleeved on the outside of the scale, an electromagnetic relay is fixedly installed on one side of the positioning mark, a closing button is movably installed on the top of the electromagnetic relay, an alarm is fixedly installed on the top of the fixed block, a contact switch is fixedly installed on the top of the fixed block, a float is provided on the inside of the local oilfield equipment, a square rod is fixedly installed on the top of the float, and a conductive rod is fixedly installed at the top of the square rod.

[0008] To facilitate the addition of acid-dissolving and unblocking fluid, the preferred oilfield acid-dissolving and unblocking fluid addition device of this utility model has a first check valve fixedly installed on the outside of the extraction pipe and a second check valve fixedly installed on the outside of the outlet pipe, with the outlet pipe penetrating the top of the local oilfield equipment.

[0009] To facilitate the addition of acid-dissolving and unblocking fluid, the preferred embodiment of the oilfield acid-dissolving and unblocking fluid addition device of this utility model has a motor fixedly installed on the top of the mounting frame, a threaded rod installed on the output end of the motor, a connecting rod threaded onto the outer side of the threaded rod, and one end of the connecting rod fixedly installed at the bottom of the piston rod.

[0010] To facilitate the addition of acid-dissolving and unblocking fluid, the preferred embodiment of the oilfield acid-dissolving and unblocking fluid addition device of this utility model has a cylinder fixedly installed on the top of the mounting frame. The cylinder is slidably sleeved with the connecting rod, and the cylinder is arranged parallel to the threaded rod.

[0011] To facilitate the linear movement of the square rod, as a preferred embodiment of the oilfield acidizing and unblocking fluid addition device of this utility model, a sleeve is fixedly sleeved on the inner side of the fixing block, the sleeve is slidably sleeved with the square rod, and the bottom end of the sleeve is fixedly connected to the top of the local oilfield equipment.

[0012] To facilitate fixed positioning, the positioning mark is preferably fitted with a locking head on the outer thread of the positioning mark as a supporting addition device for oilfield acidizing and unblocking fluid of this utility model. The positioning mark is in contact with the scale through the locking head.

[0013] For ease of power supply, as a preferred embodiment of the oilfield acidizing and unblocking fluid addition device of this utility model, a storage battery is fixedly installed on the top of the support frame, and the storage battery, electromagnetic relay, and motor are electrically connected, as are the storage battery, contact switch, and alarm.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The buoyancy of the acid-dissolving fluid in the local oilfield equipment causes the float to rise during the addition of the fluid, driving the square rod and conductive rod upwards. This creates a closed circuit when the conductive rod contacts the bottom connector of the electromagnetic relay, de-energizing the motor and stopping its operation. As the acid-dissolving fluid level in the equipment gradually decreases, the float drives the square rod and conductive rod downwards. When the conductive rod connects to the contact switch connector, a closed circuit is formed, triggering an alarm to remind workers to add more acid-dissolving fluid. This system achieves automatic addition of acid-dissolving fluid and stops when the fluid level is reached. It also alerts workers to add more fluid when only a small amount remains. Attached Figure Description

[0016] Figure 1 This is a top-down perspective view of the present invention.

[0017] Figure 2 This is a top-view perspective structural diagram of the present invention.

[0018] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0019] Figure 4 This is a partial three-dimensional structural diagram of the present invention.

[0020] In the diagram: 1. Support frame; 2. Mounting frame; 3. Fixing block; 4. Cylinder; 5. Locking head; 6. Scale; 7. Local oilfield equipment; 8. Alarm; 9. Piston; 10. Piston rod; 11. Suction pipe; 12. First check valve; 13. Discharge pipe; 14. Second check valve; 15. Positioning mark; 16. Electromagnetic relay; 17. Close button; 18. Battery; 19. Motor; 20. Threaded rod; 21. Cylinder; 22. Connecting rod; 23. Contact switch; 24. Conductive rod; 25. Sleeve; 26. Square rod; 27. Float. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., 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 be set in a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Please see Figures 1 to 4 The oilfield acidizing and unblocking fluid addition device includes a cylinder 4 fixedly installed on the top of a support frame 1, an installation frame 2 fixedly installed on the top of the support frame 1, a fixing block 3 fixedly installed on the top of the support frame 1, a piston 9 movably sleeved on the inner side of the cylinder 4, a piston rod 10 fixedly installed on the top of the piston 9, a suction pipe 11 and a discharge pipe 13 fixedly installed on the top of the cylinder 4 respectively, and a local oilfield equipment 7 is set below the support frame 1.

[0023] A scale 6 is fixedly installed on the top of the fixed block 3. A positioning mark 15 is slidably sleeved on the outside of the scale 6. An electromagnetic relay 16 is fixedly installed on one side of the positioning mark 15. A closing button 17 is movably installed on the top of the electromagnetic relay 16. An alarm 8 is fixedly installed on the top of the fixed block 3. A contact switch 23 is fixedly installed on the top of the fixed block 3. A float 27 is provided on the inside of the local oilfield equipment 7. A square rod 26 is fixedly installed on the top of the float 27. A conductive rod 24 is fixedly installed at the top of the square rod 26.

[0024] In this embodiment: by setting up a suction pipe 11 and a discharge pipe 13, it is convenient to draw external acidizing and unblocking fluid into the cylinder 4 through the suction pipe 11, and discharge the acidizing and unblocking fluid in the cylinder 4 into the local oilfield equipment 7 through the discharge pipe 13 for use. By setting up an electromagnetic relay 16 and an alarm 8, it is convenient to form a closed circuit by connecting the conductive rod 24 to the bottom connector of the electromagnetic relay 16. When the electromagnetic relay 16 is disconnected, a closed circuit is formed by connecting the conductive rod 24 to the top connector of the contact switch 23, so that the alarm 8 is energized and sounds an alarm, reminding the staff to add acidizing and unblocking fluid into the local oilfield equipment 7.

[0025] As a technical optimization of this utility model, a first one-way valve 12 is fixedly installed on the outside of the extraction pipe 11, and a second one-way valve 14 is fixedly installed on the outside of the outlet pipe 13. The outlet pipe 13 passes through the top of the local oilfield equipment 7.

[0026] In this embodiment: by setting the first one-way valve 12 and the second one-way valve 14, it is convenient to transport the acidizing and unblocking solution into the cylinder 4 in one direction only when the pumping pipe 11 is pumping liquid, and to transport the acidizing and unblocking solution from the cylinder 4 to the local oilfield equipment 7 in one direction only when the outlet pipe 13 is discharging liquid, thus facilitating the transportation and addition of the acidizing and unblocking solution.

[0027] As a technical optimization of this utility model, a motor 19 is fixedly installed on the top of the mounting bracket 2, a threaded rod 20 is installed on the output end of the motor 19, a connecting rod 22 is threadedly connected to the outer side of the threaded rod 20, and one end of the connecting rod 22 is fixedly installed at the bottom of the piston rod 10; a cylinder 21 is fixedly installed on the top of the mounting bracket 2, the cylinder 21 is slidably connected to the connecting rod 22, and the cylinder 21 is arranged parallel to the threaded rod 20.

[0028] In this embodiment: by setting up a motor 19, a threaded rod 20, and a connecting rod 22, it is convenient for the motor 19 to drive the threaded rod 20 to rotate, so that the connecting rod 22 can slide along the cylinder 21, thereby driving the piston rod 10 and the piston 9 to move. The piston 9 can extract or discharge the acid-dissolving and unblocking fluid inside the cylinder 4, which facilitates the extraction and discharge of acid-dissolving and unblocking fluid in the cylinder 4, and can add acid-dissolving and unblocking fluid to local oilfield equipment 7.

[0029] As a technical optimization of this utility model, a sleeve 25 is fixedly sleeved on the inner side of the fixing block 3, the sleeve 25 is slidably sleeved with the square rod 26, and the bottom end of the sleeve 25 is fixedly connected to the top of the local oilfield equipment 7.

[0030] In this embodiment: by setting the sleeve 25, the square rod 26 can slide along the sleeve 25 under the buoyancy of the float 27.

[0031] As a technical optimization of this utility model, a locking head 5 is installed on the outer thread of the positioning mark 15, and the positioning mark 15 is in contact with the scale 6 through the locking head 5.

[0032] In this embodiment: by setting a locking head 5, it is convenient to adjust the position of the positioning mark 15 so that the positioning mark 15 is aligned with the scale value on one side of the scale 6 to pre-set the amount of acidizing and unblocking fluid to be added to the local oilfield equipment 7, and to stop the adding operation after adding acidizing and unblocking fluid to the local oilfield equipment 7.

[0033] As a technical optimization of this utility model, a storage battery 18 is fixedly installed on the top of the support frame 1. The storage battery 18, electromagnetic relay 16, and motor 19 are electrically connected. The storage battery 18, contact switch 23, and alarm 8 are also electrically connected.

[0034] In this embodiment: By setting up a storage battery 18, it is convenient to supply power to the electromagnetic relay 16, the alarm 8, and the motor 19. The storage battery 18 and the motor 19 are provided with two independent circuits. One is a series control circuit of the storage battery 18, electromagnetic relay 16, and motor 19, which is used to add acid-dissolving liquid and disconnect the power supply. The other is a series circuit of the storage battery 18 and motor 19 through a switch, which is used to extract acid-dissolving liquid from the cylinder 4.

[0035] Working principle: First, the motor 19 is started to rotate forward, driving the threaded rod 20 to rotate, which causes the connecting rod 22 to drive the piston rod 10 to move upward, so that the piston 9 draws liquid from the cylinder 4 through the suction pipe 11. Then, the filling amount is preset by adjusting the positioning mark 15 to the scale value on one side of the scale 6. The locking head 5 is rotated to position the positioning mark 15. When the liquid in the local oilfield equipment 7 gradually decreases, the conductive rod 24 contacts the top connector of the contact switch 23, forming a closed circuit between the alarm 8 and the contact switch 23. The alarm 8 sounds an alarm to remind the staff to add acid to unblock the blockage. The staff starts the motor 19 to rotate in the reverse direction, driving the threaded rod 20 to rotate, so that the connecting rod 22 moves along the cylinder 21. The sliding motion drives the piston rod 10 and piston 9 to move. The piston 9 squeezes the acid-dissolving liquid inside the cylinder 4, making it easier for the acid-dissolving liquid inside the cylinder 4 to be discharged through the outlet pipe 13 and added to the local oilfield equipment 7. During the process of adding acid-dissolving liquid to the local oilfield equipment 7, the float ball 27 floats up, driving the square rod 26 and the conductive rod 24 to move upward. This allows a closed circuit to be formed when the conductive rod 24 contacts the bottom connector of the electromagnetic relay 16. At this time, the electromagnetic relay 16 disconnects the series circuit between the battery 18 and the motor 19, causing the motor 19 to stop running. After the acid-dissolving liquid has been used for a period of time, the conductive rod 24 will contact the contact switch 23 again. Repeating the above operation will complete the addition work.

[0036] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as riveting and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0037] The above are merely preferred embodiments of the present utility model and are 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. An oilfield acid-dissolving and unblocking fluid addition device, comprising a cylinder (4) fixedly installed on the top of a support frame (1), wherein a mounting frame (2) is fixedly installed on the top of the support frame (1), and a fixing block (3) is fixedly installed on the top of the support frame (1), characterized in that: A piston (9) is movably sleeved on the inner side of the cylinder (4), and a piston rod (10) is fixedly installed on the top of the piston (9). A liquid extraction pipe (11) and a liquid outlet pipe (13) are fixedly installed on the top of the cylinder (4), and a local oilfield equipment (7) is set below the support frame (1). A scale (6) is fixedly installed on the top of the fixed block (3). A positioning mark (15) is slidably sleeved on the outside of the scale (6). An electromagnetic relay (16) is fixedly installed on one side of the positioning mark (15). A closing button (17) is movably installed on the top of the electromagnetic relay (16). An alarm (8) is fixedly installed on the top of the fixed block (3). A contact switch (23) is fixedly installed on the top of the fixed block (3). A float (27) is provided on the inside of the local oilfield equipment (7). A square rod (26) is fixedly installed on the top of the float (27). A conductive rod (24) is fixedly installed on the top of the square rod (26).

2. The oilfield acidizing and unblocking fluid addition device according to claim 1, characterized in that: A first check valve (12) is fixedly installed on the outside of the extraction pipe (11), and a second check valve (14) is fixedly installed on the outside of the outlet pipe (13). The outlet pipe (13) passes through the top of the local oilfield equipment (7).

3. The oilfield acidizing and unblocking fluid addition device according to claim 1, characterized in that: A motor (19) is fixedly installed on the top of the mounting bracket (2). A threaded rod (20) is installed on the output end of the motor (19). A connecting rod (22) is threaded onto the outer side of the threaded rod (20). One end of the connecting rod (22) is fixedly installed at the bottom of the piston rod (10).

4. The oilfield acidizing and unblocking fluid addition device according to claim 3, characterized in that: A cylinder (21) is fixedly installed on the top of the mounting bracket (2). The cylinder (21) is slidably sleeved with the connecting rod (22). The cylinder (21) is arranged parallel to the threaded rod (20).

5. The oilfield acidizing and unblocking fluid addition device according to claim 1, characterized in that: A sleeve (25) is fixedly sleeved on the inner side of the fixed block (3). The sleeve (25) is slidably sleeved with the square rod (26). The bottom end of the sleeve (25) is fixedly connected to the top of the local oilfield equipment (7).

6. The oilfield acidizing and unblocking fluid addition device according to claim 1, characterized in that: The outer thread of the positioning mark (15) is fitted with a locking head (5), and the positioning mark (15) is pressed against the scale (6) through the locking head (5).

7. The oilfield acidizing and unblocking fluid addition device according to claim 1, characterized in that: A storage battery (18) is fixedly installed on the top of the support frame (1). The storage battery (18), electromagnetic relay (16), and motor (19) are electrically connected. The storage battery (18), contact switch (23), and alarm (8) are also electrically connected.

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