A drilling fluid flow rate regulating device for drilling wells

Abstract

The utility model belongs to the field of petroleum drilling technology especially relates to a drilling fluid flow velocity adjusting device for drilling, including adjusting box and connecting pipe, the inside of adjusting box is provided with adjusting structure, the adjusting structure includes adjusting mechanism and auxiliary mechanism, adjusting mechanism includes rotating rod, baffle, rotary plate, sliding plate, limit rod, rotating rod outer wall and baffle inner wall are connected with each other. This drilling fluid flow velocity adjusting device for drilling realizes the design of double regulation, and the included angle of baffle and drilling fluid flow direction can be quickly changed by rotating rod driving baffle rotation, the size of flow cross section is directly adjusted to control basic flow velocity, and the movable plate is driven to slide by rotating screw rod driving movable plate, the cooperation of baffle cylinder and connecting plate changes secondary flow space, realizes the fine adjustment of flow velocity, solves the problem that the flow velocity regulation range of traditional device is narrow and precision is low, satisfies the diversification flow velocity demand of complex drilling working condition.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling technology, specifically to a drilling fluid flow rate regulating device for drilling. Background Technology

[0002] In oil and gas drilling engineering, drilling fluid flow rate control directly affects drilling efficiency, wellbore stability, and downhole safety. With the increasing development of complex oil and gas reservoirs such as shale gas and deep-sea oil and gas, drilling conditions are becoming increasingly demanding, placing higher requirements on the performance of drilling fluid flow rate regulation devices.

[0003] Existing flow rate regulating devices are typically installed in the pipelines of the drilling fluid circulation system. However, in actual use, these devices have a narrow flow rate regulation range and low precision, which cannot meet the diverse flow rate requirements of complex drilling conditions and affects the normal operation of drilling work.

[0004] Therefore, we urgently need to provide a drilling fluid flow rate regulating device for drilling. Utility Model Content

[0005] The purpose of this invention is to provide a drilling fluid flow rate regulating device for drilling, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drilling fluid flow rate regulating device for drilling, comprising a regulating box and a connecting pipe, wherein the regulating box is provided with an regulating mechanism; The adjusting mechanism includes a rotating rod, a blocking plate, a rotating plate, a sliding plate, and a limiting rod. The outer wall of the rotating rod is connected to the inner wall of the blocking plate, one end of the rotating rod is connected to one side of the rotating plate, the outer wall of the rotating rod is connected to the inner wall of the sliding plate, one side of the sliding plate is connected to one end of the limiting rod, and one end of the limiting rod is inserted into a limiting plate. A connecting plate is fixedly installed on the inner wall of the adjusting box, and a threaded rod is rotatably connected to the inner side of the connecting plate. A movable plate is threadedly connected to the outer wall of the threaded rod, and a blocking cylinder is fixedly installed on the inner wall of the movable plate.

[0007] A further improvement is that a spring is fixedly installed between one side of the sliding plate and one side of the rotating plate, and there are two limiting rods, which are symmetrically distributed on one side of the sliding plate, thereby enabling quick and convenient adjustment of the angle of the blocking plate and thus better adjustment of the flow speed.

[0008] A further improvement is that an adjustment hole is provided on one side of the limiting plate, one end of the limiting rod is inserted into the inner wall of the adjustment hole, and the connecting plate is trapezoidal in shape, so that the position of the limiting rod can be adjusted quickly and conveniently, thereby enabling better use.

[0009] A further improvement is that a movable groove is provided on one side of the connecting plate, one end of the movable plate is slidably connected to the inner wall of the movable groove, and one side of the blocking cylinder is in pressure contact with one side of the connecting plate, thereby further adjusting the flow rate of the drilling fluid and thus enabling better use.

[0010] A further improvement is that the regulating box is also equipped with an auxiliary mechanism, which includes a mounting plate, a filter screen, a fixing plate, and fixing bolts. The inner side of the mounting plate is in contact with both sides of the filter screen, the bottom of the filter screen is connected to the top of the fixing plate, and the inner wall of the fixing plate is threadedly connected to the outer wall of the fixing bolts.

[0011] A further improvement is that there are two mounting plates, which are symmetrically distributed on the inner wall. The bottom of the mounting plate has a limiting hole, and the top of the fixing bolt is threaded to the inner wall of the limiting hole. This allows for quick and convenient filtration of impurities in the drilling fluid, and also allows for quick and convenient disassembly and assembly of the filter screen, thus enabling better use.

[0012] A further improvement is that one end of the regulating box is connected to one end of the connecting pipe, a flange is fixedly installed at one end of the connecting pipe, the inner wall of the regulating box is rotatably connected to one end of the rotating rod, and the inner wall of the regulating box is connected to both sides of the mounting plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This drilling fluid flow rate regulating device employs a dual-regulation design through its regulating mechanism. By rotating the rod to drive the baffle plate, the angle between the baffle plate and the drilling fluid flow direction can be quickly changed, directly adjusting the flow cross-section size to control the basic flow rate. Simultaneously, rotating the threaded rod drives the moving plate to slide the baffle cylinder. By utilizing the cooperation between the baffle cylinder and the trapezoidal connecting plate, the secondary flow space is changed, achieving fine-tuning of the flow rate. This solves the problems of narrow flow rate regulation range and low precision of traditional devices, meeting the diverse flow rate requirements of complex drilling conditions.

[0014] 2. This drilling fluid flow rate regulating device, through an auxiliary mechanism, enables the filter screen held by the mounting plate to pre-filter the drilling fluid entering the regulating tank, effectively intercepting impurities, rock cuttings and other particles, preventing them from clogging the regulating structure or entering subsequent pipelines with the drilling fluid and damaging the equipment, and also allows for quick and convenient installation and removal of the filter screen. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the adjustment mechanism of this utility model. Figure 1; Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the diagram; Figure 5 This is a schematic diagram of the structure of the adjustment mechanism of this utility model. Figure 2 ; Figure 6 This is a schematic diagram of the auxiliary mechanism of this utility model.

[0016] In the diagram: 1. Adjustment box; 2. Connecting pipe; 3. Adjustment mechanism; 301. Rotating rod; 302. Baffle plate; 303. Rotating plate; 304. Sliding plate; 305. Limiting rod; 306. Limiting plate; 307. Connecting plate; 308. Threaded rod; 309. Moving plate; 310. Baffle cylinder; 4. Auxiliary mechanism; 401. Mounting plate; 402. Filter screen; 403. Fixing plate; 404. Fixing bolt. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-6 This utility model provides a technical solution: Example 1: A drilling fluid flow rate regulating device for drilling includes a regulating box 1 and a connecting pipe 2, wherein a regulating mechanism 3 is provided inside the regulating box 1; The adjusting mechanism 3 includes a rotating rod 301, a baffle plate 302, a rotating plate 303, a sliding plate 304, and a limiting rod 305. The outer wall of the rotating rod 301 is connected to the inner wall of the baffle plate 302. One end of the rotating rod 301 is connected to one side of the rotating plate 303. The outer wall of the rotating rod 301 is connected to the inner wall of the sliding plate 304. One side of the sliding plate 304 is connected to one end of the limiting rod 305. One end of the limiting rod 305 is inserted into a limiting plate 306. A connecting plate 307 is fixedly installed on the inner wall of the adjusting box 1. A threaded rod 308 is rotatably connected to the inner side of the connecting plate 307. A movable plate 309 is threadedly connected to the outer wall of the threaded rod 308. A baffle cylinder 310 is fixedly installed on the inner wall of the movable plate 309. In this embodiment, a spring is fixedly installed between one side of the sliding plate 304 and one side of the rotating plate 303. There are two limiting rods 305, which are symmetrically distributed on one side of the sliding plate 304, so that the angle of the blocking plate 302 can be adjusted quickly and conveniently, thereby better adjusting the flow speed. Furthermore, an adjustment hole is provided on one side of the limiting plate 306, and one end of the limiting rod 305 is inserted into the inner wall of the adjustment hole. The connecting plate 307 is trapezoidal in shape, so that the position of the limiting rod 305 can be adjusted quickly and conveniently, thus enabling better use. Furthermore, a movable groove is provided on one side of the connecting plate 307, and one end of the movable plate 309 is slidably connected to the inner wall of the movable groove. One side of the blocking cylinder 310 is in pressure contact with one side of the connecting plate 307, thereby further adjusting the flow rate of the drilling fluid and enabling better use.

[0019] Rubber sealing rings / silicone sealing strips (static sealing components, adapted to the opening contour of the regulating box) are pre-installed on the mating surface (sealing surface) between the movable door and the regulating box; bolt holes are evenly distributed around the circumference of the movable door edge, and threaded holes are provided at corresponding positions in the regulating box. Work process: Close the movable door → Insert the bolts into the bolt holes of the movable door and the regulating box in sequence → Tighten the bolts one by one (the force should be applied evenly in the circumference to avoid uneven force on the sealing surface) → The sealing strip is compressed and fills the gap to achieve a seal, thereby achieving uniform sealing pressure, strong anti-leakage ability, and suitable for complex working conditions with high drilling fluid pressure.

[0020] When needed, the operator connects the drilling fluid to the external pipeline via the flange on the connecting pipe 2, allowing the drilling fluid to flow into the regulating tank 1 through the connecting pipe 2. The regulating tank 1 and the movable door on the front of the regulating tank 1 are sealed when closed. When it is necessary to adjust the flow rate of the drilling fluid, the sliding plate 304 is pulled to slide against the outer wall of the rotating rod 301. The sliding plate 304 compresses the spring and drives the limiting rod 305 to move. The movement of the limiting rod 305 allows it to be pulled out from one side of the limiting plate 306, thereby releasing the limiting fixation of the rotating rod 301. At this time, rotating the rotating plate 303 drives the rotating rod 301 to rotate. The rotation of the rotating rod 301 drives the blocking plate 302 to rotate. The size of the rotation angle of the blocking plate 302 is controlled by the rotation angle of the rotating plate 302. It can quickly and conveniently adjust the flow rate of drilling fluid, thus enabling better use. When the ideal effect cannot be achieved by using only the baffle plate 302, the moving plate 309 is slid on one side of the connecting plate 307 by rotating the threaded rod 308. The movement of the moving plate 309 drives the baffle cylinder 310 to move. Since the connecting plate 307 is trapezoidal, when the baffle cylinder 310 descends, it approaches the lower bottom surface of the trapezoid of the connecting plate 307, gradually blocking the space between the lower bottom surface of the trapezoid and the side wall, thereby reducing the flow rate of drilling fluid. Conversely, when the baffle cylinder 310 rises, it moves away from the lower bottom surface of the trapezoid of the connecting plate 307, and the space between the lower bottom surface of the trapezoid and the side wall gradually increases, thereby increasing the flow rate of drilling fluid.

[0021] Example 2: Based on Embodiment 1, the regulating box 1 is also provided with an auxiliary mechanism 4. The auxiliary mechanism 4 includes a mounting plate 401, a filter screen 402, a fixing plate 403, and a fixing bolt 404. The inner side of the mounting plate 401 is pressed and contacted with both sides of the filter screen 402. The bottom of the filter screen 402 is connected to the top of the fixing plate 403. The inner wall of the fixing plate 403 is threadedly connected to the outer wall of the fixing bolt 404. In this embodiment, there are two mounting plates 401, which are symmetrically distributed on the inner wall. The bottom of the mounting plate 401 has a limiting hole, and the top of the fixing bolt 404 is threaded to the inner wall of the limiting hole, so that impurities in the drilling fluid can be filtered quickly and conveniently, and the filter screen 402 can be disassembled and assembled quickly and conveniently, so that it can be used better. Furthermore, one end of the regulating box 1 is connected to one end of the connecting pipe 2, and a flange is fixedly installed on one end of the connecting pipe 2. The inner wall of the regulating box 1 is rotatably connected to one end of the rotating rod 301, and the inner wall of the regulating box 1 is connected to both sides of the mounting plate 401.

[0022] When needed, the operator connects the drilling fluid to the external pipeline via the flange on the connecting pipe 2, allowing the drilling fluid to flow into the regulating tank 1 through the connecting pipe 2. The flow rate of the drilling fluid can be quickly and easily adjusted via the regulating mechanism 3. Once the drilling fluid enters the regulating tank 1, impurities in the drilling fluid can be quickly and easily filtered through the filter screen 402. When the filter screen 402 needs to be disassembled, the fixing bolt 404 is rotated to move it within the inner wall of the fixing plate 403. The movement of the fixing bolt 404 allows it to be pulled out from the bottom of the mounting plate 401, thus removing the limiting fixation of the filter screen 402. At this point, the filter screen 402 can be disassembled. When installation is required, the above steps are repeated in reverse.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A drilling fluid flow rate regulating device for drilling, comprising a regulating tank (1) and a connecting pipe (2), characterized in that: The regulating box (1) is equipped with an regulating mechanism (3); The adjustment mechanism (3) includes a rotating rod (301), a baffle plate (302), a rotating plate (303), a sliding plate (304), and a limiting rod (305). The outer wall of the rotating rod (301) is connected to the inner wall of the baffle plate (302). One end of the rotating rod (301) is connected to one side of the rotating plate (303). The outer wall of the rotating rod (301) is connected to the inner wall of the sliding plate (304). One side of the sliding plate (304) is connected to one end of the limiting rod (305). One end of the limiting rod (305) is inserted into a limiting plate (306). A connecting plate (307) is fixedly installed on the inner wall of the adjustment box (1). A threaded rod (308) is rotatably connected to the inner side of the connecting plate (307). A moving plate (309) is threadedly connected to the outer wall of the threaded rod (308). A baffle cylinder (310) is fixedly installed on the inner wall of the moving plate (309).

2. The drilling fluid flow rate regulating device for drilling according to claim 1, characterized in that: A spring is fixedly installed between one side of the sliding plate (304) and one side of the rotating plate (303). There are two limiting rods (305), which are symmetrically distributed on one side of the sliding plate (304).

3. The drilling fluid flow rate regulating device for drilling according to claim 1, characterized in that: The limiting plate (306) has an adjustment hole on one side, and one end of the limiting rod (305) is inserted into the inner wall of the adjustment hole. The connecting plate (307) is trapezoidal in shape.

4. The drilling fluid flow rate regulating device for drilling according to claim 1, characterized in that: The connecting plate (307) has a movable groove on one side, and one end of the movable plate (309) is slidably connected to the inner wall of the movable groove. The blocking cylinder (310) is in contact with the connecting plate (307) on one side.

5. A drilling fluid flow rate regulating device for drilling according to claim 1, characterized in that: The regulating box (1) is also equipped with an auxiliary mechanism (4), which includes a mounting plate (401), a filter screen (402), a fixing plate (403), and fixing bolts (404). The inner side of the mounting plate (401) is pressed against the two sides of the filter screen (402), the bottom of the filter screen (402) is connected to the top of the fixing plate (403), and the inner wall of the fixing plate (403) is threadedly connected to the outer wall of the fixing bolts (404).

6. The drilling fluid flow rate regulating device for drilling according to claim 5, characterized in that: There are two mounting plates (401), which are symmetrically distributed on the inner wall. The bottom of the mounting plate (401) has a limiting hole, and the top of the fixing bolt (404) is threaded to the inner wall of the limiting hole.

7. A drilling fluid flow rate regulating device for drilling according to claim 1, characterized in that: One end of the regulating box (1) is connected to one end of the connecting pipe (2), and a flange is fixedly installed on one end of the connecting pipe (2). The inner wall of the regulating box (1) is rotatably connected to one end of the rotating rod (301), and the inner wall of the regulating box (1) is connected to both sides of the mounting plate (401).

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