Automatic regulating and continuous feeding device for liquid drilling fluid additive

Abstract

The utility model discloses a kind of liquid drilling fluid additive automatic regulation continuous feeding device, belong to petroleum engineering technical field, including liquid storage tank body, control valve body, mobile valve core, drilling fluid baffle, spring adjusting sleeve and return spring, liquid storage tank body is connected by any with control valve body intercommunication, mobile valve core is slidably arranged in control valve body inner wall, drilling fluid baffle is fixedly connected in mobile valve core right end, spring adjusting sleeve is fixed in control valve body outer wall right end, the left end of return spring is fixed in spring adjusting sleeve, right end is fixed in mobile valve core outer wall.The utility model utilizes drilling fluid flow pressure to directly drive valve core, realizes that additive flow is automatically, proportionally regulated and continuous feeding with drilling fluid flow, when drilling fluid stops flow, device can be automatically closed to prevent waste, simple structure and reliable operation simultaneously without external energy source.

Description

Technical Field

[0001] This utility model relates to the field of petroleum engineering technology, and in particular to an automatic adjustment and continuous feeding device for liquid drilling fluid additives. Background Technology

[0002] In modern oil and gas drilling engineering, drilling fluid plays a vital role. It is not only responsible for carrying rock cuttings and cooling the drill bit, but also requires the addition of various chemical additives to maintain its performance stability. The quality and precision of these liquid chemical additives directly affect the stability of the drilling fluid system and the efficiency and safety of drilling operations.

[0003] However, traditional methods of adding liquid additives have significant shortcomings. One method involves manually adding additives to the drilling fluid circulation system periodically and quantitatively. This method heavily relies on the operator's experience and sense of responsibility, making real-time monitoring and adjustment difficult. Another method uses an electrically controlled metering pump for delivery. While this method can achieve precise metering, its operation requires a stable external power supply and a complex electrical control system. In the harsh environment and unstable power supply conditions of drilling sites, the reliability of electronic components is poor, and maintenance costs are high. More importantly, neither manual operation nor a simple electrically controlled pump can achieve dynamic and automatic proportional adjustment between the additive flow rate and the actual circulating flow rate of the drilling fluid. When drilling conditions change and the circulating flow rate or velocity of the drilling fluid fluctuates, if the amount of additive added cannot be adjusted synchronously and proportionally in a timely manner, the amount of additive used will either be too little, affecting mud performance, or too much, causing unnecessary waste and potentially disrupting the drilling fluid balance system.

[0004] Therefore, this utility model proposes an automatic adjustment and continuous feeding device for liquid drilling fluid additives to solve the problems in the existing technology where the feeding method for liquid drilling fluid additives is difficult to adjust in real time, automatically, and proportionally according to the actual flow rate changes of the drilling fluid, and the equipment has a complex structure and low reliability. Utility Model Content

[0005] In view of the problems of existing liquid drilling fluid additive automatic adjustment continuous feeding devices, such as difficulty in real-time, automatic, and proportional continuous adjustment according to the actual flow rate changes of drilling fluid, and complex equipment structure and low reliability, this utility model aims to provide a liquid drilling fluid additive automatic adjustment continuous feeding device with improved structure that can effectively solve the above problems.

[0006] This utility model provides an automatic adjustment and continuous feeding device for liquid drilling fluid additives, including a storage tank for storing liquid additives, a control valve body, and a movable valve core; the bottom of the storage tank is connected to the control valve body via a connection; the movable valve core is slidably disposed on the inner wall of the control valve body along the axial direction, the diameter of the inner wall of the control valve body gradually increases from its left side to its right side, and the left outer wall of the movable valve core fits into the left inner wall of the control valve body.

[0007] It also includes drilling fluid baffles, spring adjustment sleeves, and return springs.

[0008] The top of the drilling fluid baffle is fixedly connected to the right end of the movable valve core by baffle fixing screws, and the drilling fluid baffle is used to receive the flow pressure of the drilling fluid.

[0009] Furthermore, the spring adjusting sleeve is fixed to the right end of the outer wall of the control valve body, and the left end of the inner wall of the spring adjusting sleeve is matched with the right end of the outer wall of the control valve body; the return spring is disposed between the outer wall of the control valve body and the outer wall of the moving valve core, the left end of the return spring is fixed to the spring adjusting sleeve, and the right end of the return spring is fixed to the outer wall of the moving valve core, and the return spring is used to provide a leftward reset thrust on the moving valve core.

[0010] Preferably, it also includes a support plate, which serves as the mounting base for the entire device. A valve body bracket is fixedly connected to the top center of the support plate, and the valve body bracket is used to support the control valve body. A liquid inlet groove is provided at the top left end of the support plate. The liquid inlet groove is located below the control valve body and is connected to the outlet of the control valve body, and is used to guide the additive to flow out.

[0011] Preferably, a baffle moving groove is provided at the top right of the support plate, and the bottom of the drilling fluid baffle passes through the interior of the baffle moving groove. The baffle moving groove guides and limits the reciprocating movement of the drilling fluid baffle to ensure its stability.

[0012] Preferably, a valve core bracket is fixedly connected to the top right of the support plate, and the right side of the movable valve core passes through the valve core bracket. The valve core bracket cooperates with the baffle moving groove to guide and limit the linear movement of the movable valve core and the drilling fluid baffle.

[0013] Preferably, a scale is provided through the top of the liquid storage tank, and a float is fixedly connected to the bottom of the scale; the float floats on the surface of the liquid additive and moves the scale up and down with the liquid level, so that the operator can monitor the remaining amount of additive in real time.

[0014] Preferably, the spring adjusting sleeve is threadedly connected to the outer wall of the control valve body via an adjusting sleeve locking screw. This connection method facilitates the installation and adjustment of the position of the spring adjusting sleeve, thereby adjusting the preload of the return spring.

[0015] Preferably, the left end of the return spring is fixed to the outer wall of the spring adjusting sleeve by a spring sleeve fixing screw, ensuring that the left end of the return spring is reliably fixed.

[0016] Preferably, the right end of the return spring is threaded to the outer wall of the movable valve core via a spring valve core fixing screw, ensuring that the right end of the return spring moves synchronously with the movable valve core and transmits the reset force.

[0017] This utility model has the following beneficial effects: 1. This utility model, by setting up a drilling fluid baffle, a movable valve core and a return spring, uses the flow pressure of the drilling fluid to directly drive the valve core to move and change the size of the additive channel. This solves the problem in the prior art that the feeding method is difficult to automatically adjust in real time according to the changes in drilling fluid flow, resulting in inaccurate feeding. It achieves the effect of automatically and proportionally adjusting the additive flow with the drilling fluid flow and continuous feeding.

[0018] 2. This utility model, by setting a return spring, allows the moving valve core to automatically push back to close the channel when the drilling fluid stops flowing. Moreover, the overall structure is purely mechanical, which solves the problems of high failure rate and waste caused by the need for manual intervention to stop feeding or the use of complex electrical control systems in the prior art. It achieves the effects of automatic feeding stop, waste prevention, simple structure, reliable operation, no need for external energy, and easy maintenance under harsh working conditions.

[0019] 3. This utility model, by setting a float and a scale, as well as a support plate, a baffle moving groove, and a valve core bracket, solves the problems of inconvenient monitoring of additive balance and jamming or wear of moving parts caused by lateral force interference in the prior art. It achieves the effect of convenient real-time observation of additive balance, ensuring smooth operation of the moving valve core and drilling fluid baffle, and improving the stability and service life of the device. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of an automatic adjustment and continuous feeding device for liquid drilling fluid additives proposed in this utility model; Figure 2 This is a cross-sectional view of the storage tank structure in an automatic adjustment and continuous feeding device for liquid drilling fluid additives proposed in this utility model. Figure 3 This is a cross-sectional view of the control valve body structure in an automatic adjustment and continuous feeding device for liquid drilling fluid additives proposed in this utility model. Figure 4This is a cross-sectional view of the support plate structure in an automatic adjustment and continuous feeding device for liquid drilling fluid additives proposed in this utility model.

[0021] Legend: 1. Storage tank; 2. Control valve body; 3. Scale; 4. Float; 5. Connector; 6. Adjusting sleeve locking pin; 7. Spring adjusting sleeve; 8. Spring sleeve fixing screw; 9. Return spring; 10. Spring valve core fixing screw; 11. Baffle fixing screw; 12. Moving valve core; 13. Drilling fluid baffle; 14. Support plate; 15. Inlet groove; 16. Valve body bracket; 17. Baffle moving groove; 18. Valve core bracket. Detailed Implementation

[0022] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0023] Reference Figures 1 to 4 This utility model provides an automatic adjustment and continuous feeding device for liquid drilling fluid additives, which aims to solve the problem in the prior art that the feeding method of liquid drilling fluid additives is difficult to adjust in real time, automatically and proportionally according to the actual flow rate changes of drilling fluid.

[0024] like Figure 1 and Figure 2 As shown, an automatic adjusting continuous feeding device for liquid drilling fluid additives includes a storage tank 1, a control valve body 2, and a movable valve core 12. The storage tank 1 is used to store liquid additives, and the bottom of the storage tank 1 is connected to the control valve body 2 via a connector 5. The movable valve core 12 is axially slidably disposed on the inner wall of the control valve body 2, and the diameter of the inner wall of the control valve body 2 gradually increases from left to right. The outer left wall of the movable valve core 12 fits into the inner left wall of the control valve body 2. The device also includes a drilling fluid baffle 13, a spring adjusting sleeve 7, and a return spring 9. The drilling fluid baffle 13... The top of the valve core 12 is fixedly connected to the right end of the moving valve core 12 by a baffle fixing screw 11. The drilling fluid baffle 13 is used to receive the flow pressure of the drilling fluid. The spring adjusting sleeve 7 is fixed to the right end of the outer wall of the control valve body 2, and the left end of the inner wall of the spring adjusting sleeve 7 is matched with the right end of the outer wall of the control valve body 2. The return spring 9 is set between the outer wall of the control valve body 2 and the outer wall of the moving valve core 12. The left end of the return spring 9 is fixed to the spring adjusting sleeve 7, and the right end of the return spring 9 is fixed to the outer wall of the moving valve core 12. The return spring 9 is used to provide a leftward reset thrust on the moving valve core 12.

[0025] Please refer to Figure 1 , Figure 3 and Figure 4The support plate 14 has a valve body bracket 16 fixedly connected to the middle of the top, an inlet groove 15 opened at the left end of the top, a baffle moving groove 17 opened at the right end of the top, and a valve core bracket 18 fixedly connected to the right end of the top. The support plate 14 fixedly supports the control valve body 2 through the valve body bracket 16. The inlet groove 15 is located below the control valve body 2 and is connected to the outlet of the control valve body 2.

[0026] Meanwhile, the aforementioned movable valve core 12 and drilling fluid baffle 13 are correspondingly matched with the support plate 14: the right side of the movable valve core 12 passes through the valve core bracket 18, and the bottom of the drilling fluid baffle 13 passes through the interior of the baffle moving groove 17; this through-type guiding and matching structure ensures high stability and precise positioning of the movable valve core 12 and drilling fluid baffle 13 during the axial sliding process.

[0027] To ensure the reliability of the connections of the aforementioned core components, please refer to... Figure 2 The spring adjusting sleeve 7 is threaded to the outer wall of the control valve body 2 via the adjusting sleeve locking pin 6. The left end of the return spring 9 is fixed to the outer wall of the spring adjusting sleeve 7 via the spring sleeve fixing screw 8, and the right end of the return spring 9 is threaded to the outer wall of the movable valve core 12 via the spring valve core fixing screw 10.

[0028] As a preferred embodiment, to facilitate real-time monitoring of the additive balance by operators, please refer to... Figure 1 A scale 3 is installed through the top of the liquid storage tank 1. A float 4 is fixedly connected to the bottom of the scale 3. The float 4 floats on the surface of the liquid additive and moves the scale 3 up and down with the change of liquid level.

[0029] As a preferred embodiment, to achieve reliable fixing and adjustability of the spring adjusting sleeve 7, please refer to... Figure 2 The spring adjusting sleeve 7 is threadedly connected to the outer wall of the control valve body 2 via the adjusting sleeve locking pin 6. The bottom of the adjusting sleeve locking pin 6 passes through the outer wall of the spring adjusting sleeve 7 and is threadedly connected to the outer wall of the control valve body 2.

[0030] As a preferred embodiment, to reliably fix the left end of the return spring 9, please refer to... Figure 2 After the bottom of the spring sleeve fixing screw 8 passes through the gap of the return spring 9, it is threadedly connected to the outer wall of the spring adjusting sleeve 7, and pressure is applied to the return spring 9 through the bottom of the spring adjusting sleeve 7.

[0031] As a preferred embodiment, in order to reliably fix the right end of the return spring 9 and transmit force, please refer to... Figure 2 The bottom of the spring valve core fixing screw 10 passes through the right end gap of the return spring 9 and is threaded to the outer wall of the movable valve core 12, thus fixing the right end of the return spring 9 to the outer wall of the movable valve core 12.

[0032] In use, the storage tank 1 stores drilling fluid additives. The float 4 moves the scale 3 according to the fluid level, and the remaining additive level is determined by observing the scale 3. When the drilling fluid flows, the fluid pressure acts on the drilling fluid baffle 13, pushing it to slide to the right along the baffle moving groove 17. The drilling fluid baffle 13, via the baffle fixing screw 11, drives the moving valve core 12 to move synchronously to the right. During the movement of the moving valve core 12 to the right, the return spring 9 is compressed. Since the inner diameter of the control valve body 2 gradually increases from left to right, an annular channel is formed between the displacement of the moving valve core 12 and the inner wall of the control valve body 2. The additives in the storage tank 1 are then... The connection enters the control valve body 2 through any 5 and flows into the drilling fluid through the annular channel and the inlet groove 15. The faster the drilling fluid flows, the greater the pressure acting on the drilling fluid baffle 13, the longer the moving valve core 12 moves, the larger the cross-sectional area of ​​the annular channel, and the corresponding increase in the amount of additive delivered. This achieves automatic proportional adjustment of the additive flow rate with the drilling fluid flow rate. When the drilling fluid stops flowing, the pressure acting on the drilling fluid baffle 13 disappears, and the return spring 9 pushes the moving valve core 12 and the drilling fluid baffle 13 to the left under its own elastic force. The outer left wall of the moving valve core 12 re-fits the inner left wall of the control valve body 2, the annular channel closes, and the additive delivery stops.

Claims

1. An automatic adjustment and continuous feeding device for liquid drilling fluid additives, comprising a storage tank (1) for storing liquid additives, a control valve body (2) and a movable valve core (12), wherein the bottom of the storage tank (1) is connected to the control valve body (2) by a connection (5), the movable valve core (12) is slidably disposed on the inner wall of the control valve body (2) along the axial direction, the diameter of the inner wall of the control valve body (2) gradually increases from the left to the right, and the left outer wall of the movable valve core (12) fits into the left inner wall of the control valve body (2); Its features are, Also includes: Drilling fluid baffle (13), the top of which is fixedly connected to the right end of the movable valve core (12) by baffle fixing screw (11), the drilling fluid baffle (13) is used to receive the flow pressure of drilling fluid; Spring adjusting sleeve (7), the spring adjusting sleeve (7) is fixed to the right end of the outer wall of the control valve body (2), and the left end of the inner wall of the spring adjusting sleeve (7) is matched with the right end of the outer wall of the control valve body (2); A return spring (9) is disposed between the outer wall of the control valve body (2) and the outer wall of the movable valve core (12). The left end of the return spring (9) is fixed to the spring adjusting sleeve (7), and the right end of the return spring (9) is fixed to the outer wall of the movable valve core (12). The return spring (9) is used to provide a leftward reset thrust on the movable valve core (12).

2. The automatic adjustment and continuous feeding device for liquid drilling fluid additives according to claim 1, characterized in that, It also includes a support plate (14), on which a valve body bracket (16) for supporting the control valve body (2) is fixedly connected at the top center. A liquid inlet groove (15) is provided at the top left end of the support plate (14). The liquid inlet groove (15) is located below the control valve body (2) and is connected to the outlet of the control valve body (2).

3. The automatic adjustment and continuous feeding device for liquid drilling fluid additives according to claim 2, characterized in that, The top right side of the support plate (14) is provided with a baffle moving groove (17), and the bottom of the drilling fluid baffle (13) penetrates the interior of the baffle moving groove (17).

4. The automatic adjustment and continuous feeding device for liquid drilling fluid additives according to claim 2, characterized in that, A valve core bracket (18) is fixedly connected to the top right of the support plate (14). The right side of the movable valve core (12) passes through the valve core bracket (18). The valve core bracket (18) is used to guide and limit the movable valve core (12).

5. The automatic adjustment and continuous feeding device for liquid drilling fluid additives according to claim 1, characterized in that, A scale (3) is provided through the top of the liquid storage tank (1), and a float (4) is fixedly connected to the bottom of the scale (3).

6. The automatic adjustment and continuous feeding device for liquid drilling fluid additives according to claim 1, characterized in that, The spring adjusting sleeve (7) is threadedly connected to the outer wall of the control valve body (2) via the adjusting sleeve locking pin (6).

7. The automatic adjustment and continuous feeding device for liquid drilling fluid additives according to claim 1, characterized in that, The left end of the return spring (9) is fixed to the outer wall of the spring adjusting sleeve (7) by the spring sleeve fixing screw (8).

8. The automatic adjustment and continuous feeding device for liquid drilling fluid additives according to claim 1, characterized in that, The right end of the return spring (9) is threaded to the outer wall of the movable valve core (12) by a spring valve core fixing screw (10).

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