A device and method for detecting production flow rate and water cut in a horizontal section of a horizontal well

Abstract

The present application relates to the technical field of horizontal well detection, and particularly relates to a horizontal well horizontal section production flow and water content detection device and a use method. The device comprises a pipe column arranged in a horizontal well, an oval working sampling block arranged at one end of the pipe column, and a horizontal section production flow monitoring test main body arranged outside the oval working sampling block. A multi-style sampling detection mechanism, a multi-point oil pumping mechanism, a first motor for driving the multi-point oil pumping mechanism, and a frequency modulation mechanism arranged between the first motor and the multi-point oil pumping mechanism are sequentially arranged in the oval working sampling block from front to back. The device ensures no residual liquid during detection, effectively reduces factors affecting the detection results, can sample and detect different points, avoids single sampling position and uneven sample liquid mixing, and improves the detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of horizontal well detection technology, specifically to a device and method for detecting the production flow and water content of the horizontal section of a horizontal well. Background Technology

[0002] A horizontal well is a well whose borehole trajectory reaches a horizontal angle (around 90 degrees) and then extends for a certain length (generally more than six times the thickness of the oil layer). Compared with traditional oil production techniques, horizontal wells have advantages such as longer penetration into the oil layer, larger drainage area, and higher economic benefits; horizontal well technology is an effective means to improve oilfield productivity and efficiency.

[0003] Chinese invention patent CN111502654A discloses a crude oil water content detection device, detection system, and detection method for horizontal production well sections. The device comprises a crude oil water content detection device for horizontal production well sections, a fiber optic cable installation machine, and a guide mechanism installed on the blowout preventer (BOP) of the sealer. The fiber optic cable installation machine is equipped with a continuous steel pipe armored test fiber optic cable, and the crude oil water content detection device for horizontal production well sections is installed at the end of the continuous steel pipe armored test fiber optic cable. The guide mechanism includes a test fiber optic cable injection head and a fiber optic cable guide installed on the BOP of the sealer. The crude oil water content detection device for horizontal production well sections sequentially passes through the fiber optic cable guide, the test fiber optic cable injection head, and the BOP of the sealer to enter the horizontal production well section.

[0004] However, this device performs cross-sectional testing by directly setting a moisture content detection device, but it cannot collect sample liquid from the liquid being tested. Therefore, it can only record data once and cannot make comparisons, which makes it impossible to determine its accuracy.

[0005] Chinese utility model patent with authorization announcement number CN203394449U provides a water-finding tubing string for monitoring the production flow and water cut of the vertical section of a horizontal well: the upper end of the plug at the bottom of the tubing string is connected to various levels of intelligent switches and packers through tubing; the upper end of the top-level intelligent switch is connected to a downhole storage water cut monitoring instrument located in the vertical section through tubing; the downhole storage water cut monitoring instrument is connected to a pumping unit through tubing; the upper end of the pumping unit is connected to tubing and a sucker rod installed in the tubing; the tubing is connected to the wellhead; and the upper end of the sucker rod is connected to the pumping unit on the surface.

[0006] However, this device uses a storage-type moisture content monitor for detection. During operation, liquid continuously flows to the monitor, which is always in a monitoring state. When it is necessary to detect a specific location, there is residual liquid from the previous flow inside the monitor, making it impossible to accurately detect the sample liquid at the current location, thus leading to inaccurate detection results.

[0007] Chinese invention patent with publication number CN104213908A provides a downhole storage-type flow and water cut monitoring instrument: a tubing connection thread is provided at the bottom of the monitoring instrument base; radial inlet holes and axial outlet holes on the side wall of the base form a bridge-type channel; the upper hole of the base and the outer cylinder are connected by a connector; a turbine flow meter, an array water holdup meter, a single-flow valve group, a circuit control board, a communication board and a battery are connected from bottom to top inside the outer cylinder; a pressure and thermometer are provided on the base of the single-flow valve group; and an outlet hole is provided on the side wall of the outer cylinder between the single-flow valve group and the circuit control board.

[0008] However, the above-mentioned device can only perform one test on the sample liquid after it passes through the inlet hole, and the sampling location is limited. There is a situation where the density of the sample liquid mixture is uneven, which leads to a large detection error. At the same time, the device can only be used at the bottom of a horizontal well and cannot collect samples from the required location for further testing. Summary of the Invention

[0009] The purpose of this invention is to provide a device and method for detecting the production flow rate and water content of the horizontal section of a horizontal well, so as to solve the problems mentioned in the background art.

[0010] This invention discloses a device for detecting the production flow rate and water content of a horizontal section of a horizontal well, comprising a tubing string installed inside the horizontal well, an elliptical working sampling block installed at one end of the tubing string, and a main body for monitoring and testing the production flow rate of the horizontal section installed outside the elliptical working sampling block. The elliptical working sampling block is provided with, from front to back, a multi-style sampling and detection mechanism, a multi-point oil extraction mechanism, a first motor for driving the multi-point oil extraction mechanism, and a frequency modulation mechanism located between the first motor and the multi-point oil extraction mechanism.

[0011] Furthermore, the frequency modulation mechanism includes two coaxially arranged speed-changing shafts, and a friction conical disk is provided at one end of each of the two speed-changing shafts; a worm gear is rotatably sleeved on one of the speed-changing shafts, and a limit disk is rotatably sleeved on the other speed-changing shaft; a second motor is coaxially arranged on the speed-changing shaft where the worm gear is located. It also includes a worm that is coaxially arranged with the first motor and meshes with the worm gear; A speed adjustment component is provided between the worm gear and the limiting plate.

[0012] In a preferred embodiment, the speed regulating component includes two elliptical friction blocks, each of which has a fixing post at both ends, and a limit ball at the end of the fixing post; Two ball-head grooves are formed on the outer wall of the worm gear and the limiting plate on opposite sides. The ball-head groove on the worm gear is called ball-head groove A, and the ball-head groove on the limiting plate is called ball-head groove B. The limiting balls set at both ends of the elliptical friction block are located in the ball head groove A and ball head groove B, respectively; The friction cone disk is frictionally connected to the elliptical friction block.

[0013] Furthermore, the elliptical working sampling block is provided with a first motor cavity for placing the first motor, a second motor cavity for placing the second motor, a frequency modulation cavity for placing the frequency modulation mechanism, and an oil extraction cavity for placing the multi-point oil extraction mechanism. The oil extraction cavity is provided with four evenly distributed L-shaped power cavities in the circumferential direction.

[0014] Furthermore, the multi-point oil extraction mechanism includes reciprocating rods A and B arranged perpendicularly to each other. A crankshaft is rotatably connected between reciprocating rods A and B via a pin. A cam is provided on the side of reciprocating rod B away from reciprocating rod A, and the cam is coaxially arranged with the pin that rotatably connects to the crankshaft. An eccentric rod is provided on the outer side of the cam, and a sliding shaft is rotatably connected to one end of the eccentric rod. A flat key is provided on the outer wall of the sliding shaft. A connection port is opened at one end of the speed-changing shaft with a limit plate. A keyway is opened on the inner wall of the connection port. The flat key is slidably connected in the keyway. A spring A is provided between the end of the sliding shaft and the bottom of the connection port. Pistons are provided at both ends of the reciprocating rod A and both ends of the reciprocating rod B, and the pistons are slidably connected in the L-shaped power chamber; An inlet pipe is connected to the center of the end of the L-shaped power chamber, and a supply pipe is connected to the side wall of the L-shaped power chamber.

[0015] In a preferred embodiment, both the inner wall of the inlet pipe and the inner wall of the supply pipe are provided with annular grooves, and a spring B and a sealing ball are provided in the annular grooves, with the sealing ball located at one end of the spring; The sealing ball located in the annular groove of the inlet pipe is positioned on the side closer to the outlet of the inlet pipe, while the sealing ball located in the annular groove of the supply pipe is positioned on the side farther from the outlet of the supply pipe. The diameter of the sealing ball located in the annular groove of the inlet pipe is larger than the inner diameter of the inlet pipe, and the diameter of the sealing ball located in the annular groove of the supply pipe is larger than the inner diameter of the supply pipe.

[0016] Furthermore, the multi-style sampling and detection mechanism includes two symmetrically arranged sampling bottles; The elliptical working sampling block has two symmetrically arranged detection chambers inside, each of which is equipped with a water content detection body, and the detection chamber is equipped with a liquid outlet pipe that connects to the outside.

[0017] Furthermore, each of the sampling bottles is connected to the liquid supply pipes located at both ends of the reciprocating rod A, and each of the detection chambers is connected to the liquid supply pipes at both ends of the reciprocating rod B.

[0018] Furthermore, a first locking post is provided at the center of the bottom of the sampling bottle, and two second locking posts are symmetrically arranged on the side wall of the first locking post; The elliptical working sampling block has two symmetrically arranged bottle slots for placing sampling bottles, and a card cavity matching the first card post is opened in the center of the bottom of the bottle slot. The card cavity has two parallel annular grooves A and B, with annular groove A located at the outer end of the card cavity and annular groove B located inside the card cavity. The inner wall of the card cavity has two symmetrically connected annular grooves A and B, and the barrel groove matches the second card post.

[0019] In a preferred embodiment, two square grooves are symmetrically formed at the bottom of the annular groove B. An arc-shaped retaining ring is provided inside the square groove to engage with the second retaining ring, and the arc-shaped retaining ring is fixedly connected to the square groove by a fixing post.

[0020] A method for using a device for detecting the production flow rate and water content of a horizontal section of a horizontal well, characterized by comprising the following steps: S1. Equipment Placement: The tubing string is placed into the horizontal well using external equipment; S2. Detection and monitoring: When the tubing string reaches the horizontal section of the horizontal well, the production flow rate in the horizontal section of the horizontal well is detected and monitored by the production flow rate monitoring and testing unit. S3. Control the liquid inlet speed: The output shaft of the first motor is driven to rotate by an external device, which drives the worm gear to rotate, thereby changing the angle of the elliptical friction block and thus changing the output speed of the eccentric rod, thereby determining the reciprocating frequency of the piston and controlling the liquid inlet speed. S4. Perform water content detection: The output shaft of the second motor is driven to rotate by an external device, which causes multiple pistons to work, thereby allowing the liquid in the horizontal well to enter the detection chamber. The water content in the horizontal well is then detected by the water content detection body. S5. Sample collection: Another portion of the liquid in the horizontal well enters the sampling bottle for sample collection; S6. Perform further testing: Rotate the sampling bottle outward to remove it, and then perform further testing on the sample solution.

[0021] Beneficial effects:

[0022] Compared with the prior art, the advantages of this invention are: 1. This invention, through the design of a multi-point oil extraction mechanism, allows the sample liquid to enter the detection chamber during testing. When not in operation, the liquid cannot flow out on its own, ensuring no residual liquid remains during testing. This enables accurate detection of the sample liquid at the current location and effectively reduces factors affecting the test results. When the multi-point oil extraction mechanism is working, it can sample from different points through two detection chambers and perform simultaneous testing, avoiding the situation of excessively uneven density in the sample mixture due to a single sampling location, thus improving the accuracy of the test. 2. This invention, through the setting of a multi-style sampling and detection mechanism, allows for the sampling at the required location during operation, with one part being tested and the other part being collected for further testing and comparison, thereby reducing errors and improving accuracy. 3. By setting up a frequency modulation mechanism, this invention can control the liquid flow rate of the multi-point oil extraction mechanism, thereby providing sufficient time for the detection of the current sample liquid and improving the detection effect and efficiency. 4. By setting spring B and sealing ball, the liquid can only flow in one direction; when the L-shaped power chamber forms a negative pressure, the sealing ball of the liquid inlet pipe disengages from the seal to pump the liquid; when the L-shaped power chamber forms a positive pressure, the sealing ball of the liquid inlet pipe seals, and the sealing ball of the liquid supply pipe disengages from the seal, thereby preventing liquid backflow. 5. The present invention, through the setting of through groove, annular groove A, annular groove B and second locking post, allows the sampling bottle to be installed or disassembled by rotating multiple times, which increases the path required for fixing and disassembly, improves the fixing effect, and makes installation and disassembly very convenient. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the elliptical working sampling block structure of the present invention; Figure 3 This is a schematic diagram of the frequency modulation mechanism structure of the present invention; Figure 4 This is an exploded view of the frequency modulation mechanism structure of the present invention; Figure 5 This is a schematic diagram of the multi-point oil pumping mechanism of the present invention; Figure 6 This is a cross-sectional view of the inlet pipe structure of the present invention; Figure 7 This is an exploded view of the multi-point pumping mechanism of the present invention; Figure 8 This is an enlarged view of the structure at point A of the present invention.

[0024] Among them: 1. Horizontal well, 2. Tubing string, 3. Elliptical working sampling block, 4. Horizontal section production flow monitoring and testing body, 5. Frequency modulation mechanism, 6. Multi-point pumping mechanism, 7. Multi-style sampling and testing mechanism. 301, frequency modulation chamber; 302, first motor chamber; 303, first motor; 304, oil extraction chamber; 305, L-shaped power chamber; 501. Gear change shaft; 502. Friction cone disc; 503. Worm gear; 504. Ball head groove A; 505. Limiting disc; 506. Ball head groove B; 507. Elliptical friction block; 508. Limiting ball; 509. Worm; 5010. Keyway. 601. Reciprocating rod A; 602. Crankshaft; 603. Reciprocating rod B; 604. Piston; 605. Cam; 606. Eccentric rod; 607. Sliding shaft; 608. Flat key; 609. Spring A; 6010. Liquid inlet pipe; 6011. Annular groove; 6012. Spring B; 6013. Sealing ball; 6014. Liquid supply pipe. 701. Sampling bottle; 702. First retaining post; 703. Second retaining post; 704. Bottle groove; 705. Retaining cavity; 706. Ring groove A; 707. Ring groove B; 708. Through groove; 709. Square groove; 7010. Arc-shaped retaining ring; 7011. Detection cavity; 7012. Water content detection body; 7013. Liquid outlet pipe. Detailed Implementation

[0025] To make the technical means, technical features, inventive purpose and technical effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0026] Please see Figure 1-8 This invention provides a technical solution: Example 1:

[0027] A device for detecting the production flow and water content of a horizontal section of a horizontal well 1 includes a tubing string 2 installed inside the horizontal well 1, an elliptical working sampling block 3 installed at one end of the tubing string 2, and a horizontal section production flow monitoring and testing body 4 installed outside the elliptical working sampling block 3. The elliptical working sampling block 3 is provided with, from front to back, a multi-style sampling and detection mechanism 7, a multi-point oil extraction mechanism 6, a first motor 303 for driving the multi-point oil extraction mechanism 6, and a frequency modulation mechanism 5 disposed between the first motor 303 and the multi-point oil extraction mechanism 6.

[0028] During testing, the multi-point oil extraction mechanism 6 operates to allow the sample liquid to enter the detection chamber 7011; when not in operation, the liquid cannot flow in on its own, ensuring that there is no residual liquid during testing, thus enabling accurate detection of the sample liquid at the current location and effectively reducing factors that affect the test results.

[0029] When the multi-point oil extraction mechanism 6 is working, it can sample and test different points through two detection chambers 7011, avoiding the situation of single sampling location and excessive density in the sample liquid mixture, thus improving the accuracy of detection.

[0030] In this embodiment, the frequency modulation mechanism 5 includes two coaxially arranged speed-changing shafts 501, and a friction conical disk 502 is provided at one end of each of the two speed-changing shafts 501; a worm gear 503 is rotatably sleeved on one of the speed-changing shafts 501, and a limiting disk 505 is rotatably sleeved on the other speed-changing shaft 501; a second motor is coaxially arranged on the speed-changing shaft 501 where the worm gear 503 is located; it also includes a worm 509 coaxially arranged with the first motor 303 and meshing with the worm gear 503; a speed adjustment component is provided between the worm gear 503 and the limiting disk 505.

[0031] The present invention, by setting the frequency modulation mechanism 5, can control the liquid flow rate of the multi-point oil extraction mechanism 6, thereby providing sufficient time for the detection of the current sample liquid and improving the detection effect and efficiency. In this embodiment, the elliptical working sampling block 3 is provided with a first motor cavity 302 for placing the first motor 303, a second motor cavity for placing the second motor, a frequency modulation cavity 301 for placing the frequency modulation mechanism 5, and an oil extraction cavity 304 for placing the multi-point oil extraction mechanism 6. The oil extraction cavity 304 is provided with four evenly distributed L-shaped power cavities 305 in the circumferential direction.

[0032] In this embodiment, the multi-point oil extraction mechanism 6 includes reciprocating rods A601 and B603 arranged perpendicularly to each other. A crankshaft 602 is rotatably connected between reciprocating rods A601 and B603 via a pin. A cam 605 is provided on the side of reciprocating rod B603 away from reciprocating rod A601, and the cam 605 is coaxially arranged with the pin rotatably connected to the crankshaft 602. An eccentric rod 606 is provided on the outer side of the cam 605, and a sliding shaft 607 is rotatably connected to one end of the eccentric rod 606. A flat key 608 is provided on the outer wall of the sliding shaft 607. A speed-changing shaft 501 with a limit plate 505 has a connection port at one end. A keyway 5010 is formed on the inner wall of the connection port. A flat key 608 is slidably connected in the keyway 5010. A spring A609 is provided between the end of the sliding shaft 607 and the bottom of the connection port. Pistons 604 are provided at both ends of the reciprocating rod A601 and the reciprocating rod B603. The pistons 604 are slidably connected in the L-shaped power chamber 305. An inlet pipe 6010 is connected to the center of the end of the L-shaped power chamber 305. A supply pipe 6014 is connected to the side wall of the L-shaped power chamber 305.

[0033] The present invention uses the reciprocating motion of reciprocating rods A601 and B603 to cause multiple pistons 604 to reciprocate, thereby creating different positive and negative pressures inside the L-shaped power chamber 305.

[0034] In this embodiment, the multi-sample detection mechanism 7 includes two symmetrically arranged sampling bottles 701; the elliptical working sampling block 3 has two symmetrically arranged detection chambers 7011 inside, each detection chamber 7011 is provided with a water content detection body 7012, and each detection chamber 7011 is provided with a liquid outlet pipe 7013 communicating with the outside; each sampling bottle 701 is connected to a liquid supply pipe 6014 located at both ends of the reciprocating rod A601, and each detection chamber 7011 is connected to the liquid supply pipes 6014 at both ends of the reciprocating rod B603. This allows a portion of the sample liquid to enter the detection chamber 7011 for detection, and another portion to enter the sampling bottle 701 for sampling.

[0035] By setting up a multi-sampling and detection mechanism 7, this invention allows for the sampling at the required location, with one part being tested and the other part being collected as sample liquid. Further testing and comparison can then be performed, thereby reducing errors and improving accuracy.

[0036] In this embodiment, a first locking post 702 is provided at the center of the bottom of the sampling bottle 701, and two second locking posts 703 are symmetrically arranged on the side wall of the first locking post 702; two bottle slots 704 for placing the sampling bottle 701 are symmetrically opened in the elliptical working sampling block 3, and a locking cavity 705 matching the first locking post 702 is provided at the center of the bottom of the bottle slot 704; two parallel annular grooves A706 and B707 are provided in the locking cavity 705, and the annular groove A706 is located at the outer end of the locking cavity 705, and the annular groove B707 is located inside the locking cavity 705; The inner wall of the card cavity 705 is symmetrically provided with two through grooves 708 that connect the annular grooves A706 and B707, and the barrel groove matches the second card post 703.

[0037] The present invention, through the arrangement of through groove 708, annular groove A706, annular groove B707 and second locking post 703, allows the sampling bottle 701 to be installed or disassembled through multiple rotations, increases the path required for fixing and disassembly, improves the fixing effect, and makes installation and disassembly very convenient.

[0038] Example 2:

[0039] This embodiment is basically the same as Embodiment 1, except that: In this embodiment, the speed adjustment component includes two elliptical friction blocks 507, each of which has a fixed post at both ends and a limiting ball 508 at the end of the fixed post; two ball-head grooves are formed on the outer wall of the worm gear 503 and the limiting disk 505 on opposite sides, the ball-head groove on the worm gear 503 is ball-head groove A504, and the ball-head groove on the limiting disk 505 is ball-head groove B506; the limiting balls 508 at both ends of the elliptical friction blocks 507 are respectively located in the ball-head groove A504 and the ball-head groove B506; the friction cone disk 502 is frictionally connected to the elliptical friction blocks 507.

[0040] The rotation of the output shaft of the first motor 303 drives the worm gear 509 to rotate, which in turn drives the worm wheel 503 to rotate by an angle. This causes the angles of the two elliptical friction blocks 507 to change, resulting in different contact positions between the elliptical friction blocks 507 and the friction cone disk 502, thus forming different circumferences and achieving speed regulation. The rotation of the output shaft of the second motor drives the rotation of a speed-changing shaft 501. The friction cone disk 502 is connected to the outer wall of the elliptical friction block 507, which in turn drives the rotation of another speed-changing shaft 501, causing the sliding shaft 607 to drive the eccentric rod 606 to rotate. The limiting ball 508 can rotate and move at multiple angles, thereby adjusting the angle and position of the elliptical friction block 507.

[0041] Example 3:

[0042] This embodiment is basically the same as Embodiment 1, except that: In this embodiment, both the inner wall of the inlet pipe 6010 and the inner wall of the supply pipe 6014 are provided with annular grooves 6011. A spring B6012 and a sealing ball 6013 are provided in the annular groove 6011, and the sealing ball 6013 is disposed at one end of the spring. The sealing ball 6013 located in the annular groove 6011 of the inlet pipe 6010 is positioned on the side near the outlet of the inlet pipe 6010, and the sealing ball 6013 located in the annular groove 6011 of the supply pipe 6014 is positioned on the side away from the outlet of the supply pipe 6014. The diameter of the sealing ball 6013 located in the annular groove 6011 of the inlet pipe 6010 is larger than the inner diameter of the inlet pipe 6010, and the diameter of the sealing ball 6013 located in the annular groove 6011 of the supply pipe 6014 is larger than the inner diameter of the supply pipe 6014.

[0043] By setting up spring B6012 and sealing ball 6013, the liquid can only flow in one direction.

[0044] When the L-shaped power chamber 305 forms a negative pressure, the sealing ball 6013 of the liquid inlet pipe 6010 disengages from the seal to draw liquid; when the L-shaped power chamber 305 forms a positive pressure, the sealing ball 6013 of the liquid inlet pipe 6010 seals, and the sealing ball 6013 of the liquid supply pipe 6014 disengages from the seal, thereby preventing liquid backflow.

[0045] Example 4:

[0046] This embodiment is basically the same as Embodiment 1, except that:

[0047] In this embodiment, two square grooves 709 are symmetrically opened at the bottom of the annular groove B707. An arc-shaped retaining ring 7010 is provided inside the square groove 709 for engaging with the second retaining ring. The arc-shaped retaining ring 7010 is fixedly connected to the square groove 709 by a fixing post.

[0048] A method for using a device for detecting the production flow rate and water content of a horizontal section of a horizontal well, characterized by comprising the following steps: S1. Equipment Placement: Insert the tubing string 2 into the horizontal well 1 using external equipment; S2. Detection and monitoring: When the tubing string 2 reaches the horizontal section of the horizontal well 1, the production flow rate in the horizontal section of the horizontal well 1 is detected and monitored by the production flow rate monitoring and testing body 4 of the horizontal section. S3. Control the liquid inlet speed: The output shaft of the first motor 303 is driven to rotate by an external device, which drives the worm gear 503 to rotate, thereby changing the angle of the elliptical friction block 507, and thus changing the output speed of the eccentric rod 606, thereby determining the reciprocating frequency of the piston 604 and controlling the liquid inlet speed. S4. Perform water content detection: Drive the output shaft of the second motor to rotate through external equipment, so that multiple pistons 604 work, thereby allowing the liquid in the horizontal well 1 to enter the detection chamber 7011, and perform water content detection in the horizontal well 1 through the water content detection body 7012. S5. Sample collection: Another portion of the liquid in horizontal well 1 enters the sampling bottle 701 for sample collection; S6. Perform further testing: Rotate the sampling bottle 701 outward to remove it, and then perform further testing on the sample solution.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the claims of this invention should fall within the technical scope of this invention.

Claims

1. A device for detecting the production flow rate and water cut of a horizontal section of a horizontal well, characterized in that: It includes a tubing string installed inside a horizontal well, an elliptical working sampling block installed at one end of the tubing string, and a horizontal section production flow monitoring and testing body installed outside the elliptical working sampling block. The elliptical working sampling block is provided with, from front to back, a multi-style sampling and detection mechanism, a multi-point oil extraction mechanism, a first motor for driving the multi-point oil extraction mechanism, and a frequency modulation mechanism between the first motor and the multi-point oil extraction mechanism. The frequency modulation mechanism includes two coaxial speed-changing shafts, and a friction conical disk is provided at one end of each of the two speed-changing shafts; a worm gear is rotatably sleeved on one of the speed-changing shafts, and a limit disk is rotatably sleeved on the other speed-changing shaft; a second motor is coaxially arranged on the speed-changing shaft where the worm gear is located. It also includes a worm that is coaxially arranged with the first motor and meshes with the worm gear; A speed adjustment component is provided between the worm gear and the limiting plate; The elliptical working sampling block is provided with a first motor cavity for placing the first motor, a second motor cavity for placing the second motor, a frequency modulation cavity for placing the frequency modulation mechanism, and an oil extraction cavity for placing the multi-point oil extraction mechanism. The oil extraction cavity is provided with four evenly distributed L-shaped power cavities in the circumferential direction. The multi-point oil extraction mechanism includes reciprocating rods A and B arranged perpendicularly to each other. A crankshaft is rotatably connected between reciprocating rods A and B via a pin. A cam is provided on the side of reciprocating rod B away from reciprocating rod A, and the cam is coaxially arranged with the pin that rotatably connects to the crankshaft. An eccentric rod is provided on the outer side of the cam, and a sliding shaft is rotatably connected to one end of the eccentric rod. A flat key is provided on the outer wall of the sliding shaft. A connection port is opened at one end of the speed-changing shaft with a limit plate. A keyway is opened on the inner wall of the connection port. The flat key is slidably connected in the keyway. A spring A is provided between the end of the sliding shaft and the bottom of the connection port. Pistons are provided at both ends of the reciprocating rod A and both ends of the reciprocating rod B, and the pistons are slidably connected in the L-shaped power chamber.

2. The device for detecting production flow and water cut in the horizontal section of a horizontal well according to claim 1, characterized in that: The speed adjustment component includes two elliptical friction blocks, each of which has a fixing post at both ends and a limit ball at the end of the fixing post. Two ball-head grooves are formed on the outer wall of the worm gear and the limiting plate on opposite sides. The ball-head groove on the worm gear is called ball-head groove A, and the ball-head groove on the limiting plate is called ball-head groove B. The limiting balls set at both ends of the elliptical friction block are located in the ball head groove A and ball head groove B, respectively; The friction cone disk is frictionally connected to the elliptical friction block.

3. The device for detecting production flow and water cut in the horizontal section of a horizontal well according to claim 2, characterized in that: An inlet pipe is connected to the center of the end of the L-shaped power chamber, and a supply pipe is connected to the side wall of the L-shaped power chamber.

4. The device for detecting production flow and water cut in the horizontal section of a horizontal well according to claim 3, characterized in that: Both the inner wall of the inlet pipe and the inner wall of the supply pipe are provided with annular grooves. A spring B and a sealing ball are provided in the annular grooves, and the sealing ball is located at one end of the spring. The sealing ball located in the annular groove of the inlet pipe is positioned on the side closer to the outlet of the inlet pipe, while the sealing ball located in the annular groove of the supply pipe is positioned on the side farther from the outlet of the supply pipe. The diameter of the sealing ball located in the annular groove of the inlet pipe is larger than the inner diameter of the inlet pipe, and the diameter of the sealing ball located in the annular groove of the supply pipe is larger than the inner diameter of the supply pipe.

5. The horizontal well horizontal section production flow and water cut detection device according to claim 4, characterized in that: The multi-style sampling and detection mechanism includes two symmetrically arranged sampling bottles; The elliptical working sampling block has two symmetrically arranged detection chambers inside, each of which is equipped with a water content detection body, and the detection chamber is equipped with a liquid outlet pipe that connects to the outside.

6. The device for detecting production flow and water cut in the horizontal section of a horizontal well according to claim 5, characterized in that: Each of the sampling bottles is connected to the liquid supply pipes located at both ends of the reciprocating rod A, and each of the detection chambers is connected to the liquid supply pipes at both ends of the reciprocating rod B.

7. The device for detecting production flow and water cut in the horizontal section of a horizontal well according to claim 6, characterized in that: A first locking post is provided at the center of the bottom of the sampling bottle, and two second locking posts are symmetrically arranged on the side wall of the first locking post; The elliptical working sampling block has two symmetrically arranged bottle slots for placing sampling bottles, and a card cavity matching the first card post is opened in the center of the bottom of the bottle slot. The card cavity has two parallel annular grooves A and B, with annular groove A located at the outer end of the card cavity and annular groove B located inside the card cavity. The inner wall of the card cavity has two symmetrical through grooves connecting annular groove A and annular groove B, and the through grooves match the second card post.

8. The device for detecting production flow and water cut in the horizontal section of a horizontal well according to claim 7, characterized in that: The bottom of the annular groove B has two symmetrical square grooves. Inside the square grooves are arc-shaped retaining rings for engaging with the second retaining ring, and the arc-shaped retaining rings are fixedly connected to the square grooves by fixing posts.

9. A method of using the production flow rate and water cut detection device for the horizontal section of a horizontal well as described in any one of claims 1-8, characterized in that: Includes the following steps: S1. Equipment Placement: The tubing string is placed into the horizontal well using external equipment; S2. Detection and monitoring: When the tubing string reaches the horizontal section of the horizontal well, the production flow rate in the horizontal section of the horizontal well is detected and monitored by the production flow rate monitoring and testing unit. S3. Control the liquid inlet speed: The output shaft of the first motor is driven to rotate by an external device, which drives the worm gear to rotate, thereby changing the angle of the elliptical friction block and thus changing the output speed of the eccentric rod, thereby determining the reciprocating frequency of the piston and controlling the liquid inlet speed. S4. Perform water content detection: The output shaft of the second motor is driven to rotate by an external device, which causes multiple pistons to work, thereby allowing the liquid in the horizontal well to enter the detection chamber. The water content in the horizontal well is then detected by the water content detection body. S5. Sample collection: Another portion of the liquid in the horizontal well enters the sampling bottle for sample collection; S6. Perform further testing: Rotate the sampling bottle outward to remove it, and then perform further testing on the sample solution.

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