Portable novel drilling fluid outlet flow measuring device

Abstract

The utility model discloses a portable novel drilling fluid outlet flow measuring device. The portable novel drilling fluid outlet flow measuring device comprises a sealing shell, a gear set, an inductance type rotation angle sensor, an automatic rebounding device and a flow blocking device, wherein the gear set, the inductance type rotation angle sensor and the automatic rebounding device are installed in the sealing shell. The inductance type rotation angle sensor is driven by the gear set; during use, the driving end of the flow blocking device extends into the slurry outlet pipeline, the driven end of the flow blocking device extends out of the slurry outlet pipeline, enters the sealing shell and is in driving connection with the gear set, and when drilling fluid flows to a slurry groove through the pipeline, the driving end of the flow blocking device is driven to move, so that the slurry flow can be measured; and the automatic rebounding device is matched with the gear set to drive the gear set to automatically rebound to a zero position state. The mud flow measuring device is simple in structure, low in machining cost, convenient to operate, suitable for measuring the mud flow at an outlet in a petroleum and natural gas extraction drilling site, and capable of conducting early warning and monitoring on dangerous working conditions such as well kick and well leakage possibly occurring in the drilling process.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas exploration and development, specifically to a portable new drilling fluid outlet flow measurement device. Background Technology

[0002] Oil drilling is a core component of the petroleum industry, directly impacting national energy security and economic development. With the continuous growth of global demand for energy sources such as oil, oil drilling technology is constantly evolving and improving. During the drilling process, risks such as lost circulation, overflows, and well kicks may occur; if not detected promptly, these can lead to serious drilling accidents like blowouts. Therefore, monitoring drilling fluid outlet flow is an essential part of the drilling operation.

[0003] Currently, the oil drilling industry mostly uses outlet flow sensors to measure the outlet flow rate of drilling fluid. Existing baffle-type flow meters are installed at the drilling fluid outlet pipeline location to measure and evaluate the drilling fluid by measuring the amount of drilling fluid exiting the vibrating screen or the height of the liquid in the mud pipeline. Because the measuring device needs to be immersed in mud for extended periods, oil or vapor from the mud can easily seep into the device, causing internal damage and measurement failure. When the measuring device is not used for a long time, the mud on the baffle surface dries and solidifies, making it difficult for the measuring device to return to the zero position, affecting subsequent measurements. Utility Model Content

[0004] The technical problem this invention aims to solve is to address the shortcomings of existing baffle-type flow meters. Because the measuring device needs to be immersed in mud for extended periods, oil or steam from the mud can easily seep into the measuring device, causing internal damage and measurement failure. Furthermore, when the measuring device is not used for a long time, the mud on the baffle plate dries and solidifies, making it difficult for the measuring device to return to the zero position, thus affecting subsequent measurements. This invention provides a portable, novel drilling fluid outlet flow measuring device with a simple structure, easy installation, and excellent overall sealing. It ensures that the device is not immersed in mud during operation, and the mud baffle automatically returns to the zero position after measurement, minimizing the impact on subsequent measurements.

[0005] The technical problem to be solved by this utility model can be achieved through the following technical solution:

[0006] A portable new drilling fluid outlet flow measurement device includes:

[0007] A sealing housing installed on the mud outlet pipeline during use;

[0008] The gear set is installed inside the sealed housing;

[0009] An inductive rotary angle sensor installed inside the sealed housing, driven by the gear set, converts the received flow rate of the outlet mud into a flow signal and outputs the flow signal to a flow meter located outside the sealed housing.

[0010] A flow-blocking device is inserted into the mud outlet pipeline during use. The passive end of the flow-blocking device extends out of the mud outlet pipeline and enters the sealed housing, and is driven and connected to the gear set. When the drilling fluid flows through the pipeline to the mud tank, it drives the active end of the flow-blocking device to move, so that the mud flow rate can be measured.

[0011] An automatic rebound device is installed inside the sealed housing. The automatic rebound device cooperates with the gear set to drive the gear set to automatically rebound to the zero position.

[0012] In a preferred embodiment of the present invention, a sealing sleeve is provided on the sealing housing to achieve a seal between the passive end of the flow-blocking device and the sealing housing.

[0013] In a preferred embodiment of the present invention, a bushing is provided inside the sealing housing, and the sealing sleeve is disposed inside the bushing.

[0014] In a preferred embodiment of this utility model, a connecting shaft is provided on the bushing, and the connecting shaft is driven to the passive end of the flow-blocking device, thereby driving the gear set to rotate.

[0015] In a preferred embodiment of this utility model, the gear set includes a large gear and a small gear. The large gear is fixed on the connecting shaft and is driven to rotate by the passive end of the flow-blocking device. The small gear meshes with the large gear. The small gear is driven to connect with the inductive rotation angle sensor and drives the inductive rotation angle sensor to work. The small gear shaft is located on the sealed housing.

[0016] In a preferred embodiment of this utility model, the flow-blocking device includes a flow-blocking plate, a counterweight, and a lever. The counterweight and the flow-blocking plate are installed on the active end of the lever and extend into the mud outlet pipeline. The lever extends out of the mud outlet pipeline, passes through the sealing sleeve, and enters the bushing, where it is driven to connect with the connecting shaft and drive the large gear to rotate.

[0017] In a preferred embodiment of the present invention, the automatic rebound device includes a high-strength coil spring, one end of which acts on the sealing housing and the other end of which acts on the pinion.

[0018] In a preferred embodiment of this utility model, the large gear is a sector gear, and the automatic rebound device further includes a pair of limiting posts, which are respectively fixed on the two end faces of the large gear and cooperate with the sealing housing to limit the rotation angle of the large gear.

[0019] Due to the adoption of the above technical solution, this utility model has a simple structure, low cost, is easy to operate on-site, and has high reliability. Drilling operations are unaffected during operation, allowing for continuous measurement, and it is suitable for real-time monitoring of drilling fluid during drilling operations in oil exploration sites. After measurement, the mud baffle automatically rebounds to the zero position, reducing the impact on the next measurement. This utility model effectively improves the service life of the equipment, thereby saving drilling expenses and improving economic efficiency.

[0020] This utility model has a simple structure, moderate size, good sealing performance, simple operation, and strong practicality. It can effectively monitor the working conditions at the drilling site, making it convenient for on-site personnel to detect dangerous conditions such as well leakage and well kick in a timely manner, and ensuring the safety of drilling operations. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the sealing shell of this utility model.

[0022] Figure 2 This is a schematic diagram of the flow-blocking device of this utility model.

[0023] Figure 3 This is a partial structural diagram of the automatic rebound device of this utility model. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, in the following descriptions, well-known structures and technologies have been omitted to avoid unnecessary confusion regarding the concept of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] See Figures 1 to 3 The figure shows a portable new type of drilling fluid outlet flow measurement device, including a sealing housing 100, a flow-blocking device 200, an automatic rebound device 300, an inductive rotation angle sensor (not shown in the figure), and a flow meter (not shown in the figure). The sealing housing 100 is installed on the mud outlet pipeline 400 during use and specifically includes: an upper cover plate 110, a cylinder 120, a lower cover plate 130, a bushing fixing plate 140, a bushing 150, an upper rubber sealing gasket 160, an intermediate rubber sealing gasket 170, a lower rubber sealing gasket 180, a sealing sleeve sealing plate 190a, and a sealing sleeve 190. The upper cover plate 110, cylinder 120, lower cover plate 130, and bushing 150 are all made of 304 stainless steel.

[0028] The upper cover plate 110 is a rectangle with dimensions of 220mm × 180mm and a thickness of not less than 4mm. The upper cover plate 110 has through holes 111 with a diameter of Φ5.5mm at its four corners and the center line of its edges.

[0029] The cylinder 120 is a rectangular barrel structure with a thickness of not less than 1.5mm and dimensions of 180mm × 140mm × 140mm. It has an upper connecting flange 121 and a lower connecting flange 122 at both ends, which are welded to the upper and lower openings of the cylinder 120, and the upper and lower surfaces of the cylinder 120 are flush. The outer dimensions of the upper connecting flange 121 are the same as those of the upper cover plate 110. A through hole 123a with a diameter of not less than Φ20mm is formed on the cylinder wall 123 of the cylinder 120 at a position 40mm from the upper edge to ensure the output of cables for internal sensors and other equipment. Through holes 121a and 122a are machined at the four corners and the center line of the edge of the upper connecting flange 121 and the lower connecting flange 122, respectively. The number and position of the through holes 121a correspond one-to-one with the number and position of the through holes 111. Additionally, a vertical plate 124 is fixed to the inner surface of the cylinder wall 123 of the cylinder 120. The upright plate 124 is a square plate with a thickness of t = 10 mm, and a Φ16 mm hole 124a is opened on the upright plate 124.

[0030] The outer dimensions of the bushing fixing plate 140 are the same as those of the lower connecting flange 122. Through holes 141 are machined at the four corners and the center line of the edge of the bushing fixing plate 140. In addition, a bushing hole 142 is also opened in the bushing fixing plate 140, and several through holes 143 are provided around the bushing hole 142.

[0031] The lower cover plate 130 is thicker than the upper cover plate 110, and its dimensions are 220mm × 180mm. Through holes 131 with a diameter of Φ9mm are formed at the four corners and the center line of the edge of the lower cover plate 130. Additionally, the lower cover plate 130 is provided with lever holes 132, and several Φ91mm countersunk bolt holes 133 are formed around the lever holes 132 at a distance of 80mm from the short side of the plate. These countersunk bolt holes 133 correspond one-to-one with several through holes 143 on the bushing fixing plate 140. Furthermore, to ensure the overall sealing of the structure, M5 threaded holes (not shown in the figure) are machined on both sides at a distance of 30mm from the through holes 131 and at the edge of the center line of the lower cover plate 130.

[0032] The bushing 150 has a barrel-shaped structure. The bottom of the bushing 150 is welded into the bushing hole 142 of the bushing fixing plate 140, and a flange 151 is provided at the bottom of the bushing 150. Several threaded holes 152 are provided on the flange 151, and the several threaded holes 152 correspond one-to-one with several through holes 143 on the bushing fixing plate 140. The top of the bushing 150 is welded to the vertical plate 124.

[0033] The outer dimensions of the upper rubber sealing gasket 160 are the same as those of the upper cover plate 110. Through holes 161 are machined at the four corners and the center line of the edge of the upper rubber sealing gasket 160. The number and position of the through holes 161 correspond one-to-one with the number and position of the through holes 121a and the number and position of the through holes 111.

[0034] The intermediate rubber gasket 170 has a frame-shaped structure, and the size of its inner hole is consistent with the shape and size of the inner hole of the lower connecting flange 122. Several through holes 171 are machined at the four corners and the center line of the edge of the intermediate rubber gasket 170. The number and position of the several through holes 171 correspond one-to-one with the position and number of through holes 131 on the lower cover plate 130, the position and number of through holes 141 on the bushing fixing plate 140, and the position and number of through holes 122a on the lower connecting flange 122.

[0035] The lower rubber gasket 180 has a frame-shaped structure, and the size of its inner hole is consistent with the shape and size of the inner hole of the lower connecting flange 122. Several through holes 181 are machined at the four corners and the center line of the edge of the lower rubber gasket 180. The number and position of the several through holes 181 correspond one-to-one with the number and position of several through holes 171, the position and number of through holes 131 on the lower cover plate 130, the position and number of through holes 141 on the bushing fixing plate 140, and the position and number of through holes 122a on the lower connecting flange 122.

[0036] The sealing sleeve sealing plate 190a has a frame structure, and the inner hole size is the same as the inner hole size of the flange 151. Several through holes 191a are provided on the sealing sleeve sealing plate 190a. The position and number of the several through holes 191a correspond one-to-one with the position and number of several threaded holes 152 on the flange 151 and the position and number of several through holes 143 on the bushing fixing plate 140.

[0037] The sealing sleeve 190 is trumpet-shaped and has an outer flange edge 190a and an inner flange edge 190b. A plurality of through holes 190c are provided on the outer flange edge 190a. The position and number of the plurality of through holes 190c correspond one-to-one with the position and number of the plurality of through holes 191a on the sealing plate 190a of the sealing sleeve, the position and number of the plurality of threaded holes 152 on the flange 151, and the position and number of the plurality of through holes 143 on the bushing fixing plate 140.

[0038] The upper rubber gasket 160, the middle rubber gasket 170, the lower rubber gasket 180, the sealing sleeve sealing plate 190a, and the sealing sleeve 190 are all made of oil-resistant rubber gaskets. The sealing sleeve 190 is made according to the shape of the opening. The shape of the sealing sleeve 190 should ensure that the lever 230 can move freely within the design range. Therefore, the shape of the sealing sleeve 190 needs to be customized according to the movement trajectory of the lever 230 and the internal structure of the bushing 150 to ensure the sealing performance of the overall structure when the lever 230 moves.

[0039] The assembly process of the sealed housing 100 is as follows:

[0040] Stack the outer flange edge 191 of the sealing sleeve 190, the lower rubber gasket 180, the bushing fixing plate 140, and the sealing sleeve sealing plate 190a on the lower cover plate 130 from bottom to top, ensuring that the threaded holes 152 on the flange 151, the through holes 191a on the sealing sleeve sealing plate 190a, the through holes 190c on the outer flange edge 190a, and the bolt countersunk holes 133 on the lower cover plate 130 are aligned one by one. Then, pass the inner flange edge 190b of the sealing sleeve 190 through the lever hole 132 on the lower cover plate 130. Finally, screw the countersunk bolts 190d from bottom to top through the bolt countersunk holes 133 on the lower cover plate 130, the through holes 190c on the outer flange edge 190a, and the through holes 191a on the sealing sleeve sealing plate 190a into the threaded holes 152 on the flange 151. The bushing 150 and the sealing sleeve 190 are now installed. At the same time, the through holes 181 on the lower rubber sealing gasket 180, the through holes 141 on the bushing fixing plate 140, and the through holes 131 on the lower cover plate 130 are matched one by one.

[0041] Next, the intermediate rubber gasket 170 and the lower connecting flange 122 are stacked on the bushing fixing plate 140 from bottom to top, so that the through holes 171 on the intermediate rubber gasket 170 and the through holes 122a on the lower connecting flange 122 correspond one-to-one with the through holes 141 on the bushing fixing plate 140. Then, the bolts 190e are passed through the through holes 122a on the lower connecting flange 122, the through holes 171 on the intermediate rubber gasket 170, the through holes 141 on the bushing fixing plate 140, the through holes 181 on the lower rubber gasket 180, and the through holes 131 on the lower cover plate 130 in sequence from top to bottom, and then locked with nuts 190f.

[0042] A hole 156 with a diameter of Φ21mm is machined on the bushing 150. The connecting shaft 154 is installed in the hole 156 through the copper bushing 153, and the copper bushing 153 and the hole 156 are interference fit.

[0043] The connecting shaft 154 passes through the inner and outer walls of the bushing 150. The large gear 310 in the gear set is fixed to the outer end of the connecting shaft 154. The small gear 320 is mounted on the vertical plate 124 via a shaft 321 and a bearing 322. To ensure no relative movement between the bearing 322 and the vertical plate 124, the Φ16mm opening 124a on the vertical plate 124 should have an interference fit with the bearing 322. The large gear meshes with the small gear 310, and the rotation of the large gear drives the rotation of the small gear 310. The large gear 310, small gear 320, and vertical plate 124 in the gear set are all made of 304 stainless steel.

[0044] Several threaded holes 124b for mounting flow sensors are provided on the vertical plate 124. An inductive rotary angle sensor (not shown in the figure) is mounted on the vertical plate 124 by bolts. A pinion 320 is connected to the inductive rotary angle sensor via a connecting shaft (not shown in the figure), and the pinion 320 drives the inductive rotary angle sensor to work for measurement. The lead wire of the inductive rotary angle sensor is led out through the through hole 123a.

[0045] The flow-blocking device 200 includes a flow-blocking plate 210, a counterweight 220, and a lever 230. To prevent corrosion from oil in the mud, the flow-blocking plate 210, the counterweight 220, and the lever 230 are all made of stainless steel. The flow-blocking plate 210 consists of reinforcing ribs (not shown in the figure), round steel (not shown in the figure), and a flat plate (not shown in the figure). The reinforcing ribs are strips with a thickness of t = 2 mm and a height of 18 mm. They are welded to both sides of the center line of the flat plate according to the length of the flat plate of the flow-blocking plate 210. Each reinforcing rib has at least 3 through holes of Φ6.5 mm processed at its longitudinal center line, and the spacing between the through holes is at least 50 mm. The round steel has a size of Φ32 mm × 120 mm and a length consistent with the width of the flat plate. One end of the flat plate is bent and welded to the round steel to increase the weight of the flow-blocking device.

[0046] The counterweight 220 has the same width and thickness and is installed in conjunction with the reinforcing rib. The long side of the counterweight 220 is machined with a through hole of the same size as the Φ6.5mm through hole on the reinforcing rib.

[0047] The lever 230 is machined into a 60° bend at 1 / 3 of its length. One end of the longer section (the active end of the aforementioned flow-blocking device 200) is sealed with a stainless steel end cap to prevent mud and sewage from entering. The shorter section (the driven end of the aforementioned flow-blocking device 200) has a nested end welded to its end face (not shown in the figure). The nest is a T-shaped structure. The vertical part of the T-shaped structure is a round steel that is machined and embedded into the shorter section of the lever 230 and welded to the lever 230. The horizontal part of the T-shaped structure is a Φ25mm round tube, which is nested on the inner end of the connecting shaft 154. The swing of the lever 230 drives the large gear 310 to rotate through the connecting shaft 154.

[0048] The long section of the lever 230 is installed between the reinforcing ribs. Multiple Φ6.5 through holes with a spacing of 50mm are machined along the long section of the lever 230, and it can be fixed to the reinforcing rib with the counterweight 220 by fasteners. The installation position of the counterweight 220 and the reinforcing rib can be adjusted according to the actual needs of the application site.

[0049] The automatic rebound device 300 includes a high-strength coil spring 510, two limiting posts 520a and 520b, and a sector-shaped pad 530. All components—the high-strength coil spring 510, the two limiting posts 520a and 520b, and the sector-shaped pad 530—are made of 304 stainless steel. The high-strength coil spring 510 is wound around the shaft 321 of the pinion 320. One end of the high-strength coil spring 510 acts on the pinion 320, and the other end acts on the vertical plate 124. The rebound force of the high-strength coil spring 310 causes the flow-blocking device to rebound to its initial state.

[0050] The large gear 310 is a sector gear. A pair of limiting posts 520a and 520b are fixed to the two end faces of the large gear 310 respectively. The sector-shaped pad 330 has an outer diameter of Φ118mm and is fixed to the bushing fixing plate 140 by countersunk screws and is located below the large gear 310. The pair of limiting posts 320a and 320b cooperate with the sector-shaped pad 330 to limit the rotation angle of the large gear 310. By adjusting the length of the two limiting posts 320a and 320b, when the baffle 210 moves to the maximum and minimum values ​​of the design range, the pair of limiting posts 320a and 320b can both fall on the sector-shaped pad 530.

[0051] After the gear set, inductive rotation angle sensor, and the inner end of the nested connecting shaft 154 are installed, the upper rubber sealing gasket 160 and the upper cover plate 110 are stacked on the upper connecting flange 121 from bottom to top, so that the outer dimensions of the upper rubber sealing gasket 160 are consistent with the outer dimensions of the upper cover plate 110. After aligning the through holes 161 of the upper rubber sealing gasket 160, the through holes 111 of the upper cover plate 110, and the through holes 122a of the upper connecting flange 121 one by one, several bolts 190g are passed through the through holes 111 of the upper cover plate 110, the through holes 161 of the upper rubber sealing gasket 160, and the through holes 122a of the upper connecting flange 121 from top to bottom, and then the bolts are locked with nuts 190h.

[0052] At the drilling site, appropriate openings are machined on the mud outlet pipeline 400. Then, a mounting base suitable for the sealing housing 100 is welded to the opening of the mud outlet pipeline 400 and installed onto the mounting base through M5 threaded holes and fasteners. At the same time, the baffle plate 210 and counterweight 220 on the active end of the lever 230 in the flow-blocking device 200 are inserted into the mud outlet pipeline 400 through the opening, ensuring that the baffle plate 210 and counterweight 220 on the active end of the lever 230 swing freely within the mud outlet pipeline 400 without interfering with the inner wall of the mud outlet pipeline 400.

[0053] As the drilling fluid flows through the pipeline to the mud tank, it impacts the baffle plate 210 and counterweight 220 on the active end of the lever 230 in the flow-blocking device 200. This causes the baffle plate 210 and counterweight 220 to move, which in turn drives the connecting shaft 154 to rotate through the nesting on the passive end of the lever 230. The rotating connecting shaft 154 drives the large gear 310 to rotate, which in turn drives the small gear 320 to rotate. The rotating small gear 320 drives the inductive rotation angle sensor to work, converting the received flow rate of the outlet mud into a flow signal and outputting the flow signal to a flow meter located outside the sealed housing.

Claims

1. A portable novel drilling fluid outlet flow measurement device, characterized in that: include A sealing housing installed on the mud outlet pipeline during use; Gear assembly installed within the sealed housing; An inductive rotary angle sensor installed inside the sealed housing, driven by the gear set, converts the received flow rate of the outlet mud into a flow signal and outputs the flow signal to a flow meter located outside the sealed housing. A flow-blocking device is inserted into the mud outlet pipeline during use. The passive end of the flow-blocking device extends out of the mud outlet pipeline and enters the sealed housing, and is driven and connected to the gear set. When the drilling fluid flows through the pipeline to the mud tank, it drives the active end of the flow-blocking device to move, so that the mud flow rate can be measured. An automatic rebound device is installed inside the sealed housing. The automatic rebound device cooperates with the gear set to drive the gear set to automatically rebound to the zero position.

2. The portable novel drilling fluid outlet flow measurement device according to claim 1, characterized in that: A sealing sleeve is provided on the sealing housing to achieve a seal between the passive end of the flow-blocking device and the sealing housing.

3. The portable novel drilling fluid outlet flow measurement device according to claim 1, characterized in that: A bushing is provided inside the sealed housing, and the sealing sleeve is disposed inside the bushing.

4. The portable novel drilling fluid outlet flow measurement device according to claim 3, characterized in that: A connecting shaft is provided on the bushing, and the connecting shaft is driven to the passive end of the flow-blocking device, thereby driving the gear set to rotate.

5. The portable novel drilling fluid outlet flow measurement device according to claim 4, characterized in that: The gear set includes a large gear and a small gear. The large gear is fixed on the connecting shaft and is driven to rotate by the passive end of the flow-blocking device. The small gear meshes with the large gear. The small gear is driven to connect with the inductive rotation angle sensor and drives the inductive rotation angle sensor to work. The small gear shaft is located on the sealed housing.

6. The portable novel drilling fluid outlet flow measurement device according to claim 5, characterized in that: The flow-blocking device includes a flow-blocking plate, a counterweight, and a lever. The counterweight and the flow-blocking plate are installed on the active end of the lever and extend into the mud outlet pipeline. The lever extends out of the mud outlet pipeline, passes through the sealing sleeve, and enters the bushing, where it is driven to connect with the connecting shaft and drive the large gear to rotate.

7. A portable novel drilling fluid outlet flow measurement device according to claim 6, characterized in that: The automatic rebound device includes a high-strength coil spring, one end of which acts on the sealed housing and the other end acts on the pinion.

8. A portable novel drilling fluid outlet flow measurement device according to claim 7, characterized in that: The large gear is a sector gear, and the automatic rebound device also includes a pair of limiting posts, which are fixed to the two end faces of the large gear respectively, and cooperate with the sealing housing to limit the rotation angle of the large gear.

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