A horizontal well coiled tubing rotatable washover tool

Abstract

The utility model provides a kind of horizontal well coiled tubing rotatable flushing head tool, it is related to coiled tubing operation equipment technical field, including flushing head;Still include connecting mechanism, the connecting mechanism includes fixed cylinder, the fixed cylinder is fixedly connected with flushing head, the fixed cylinder surface is equipped with multiple groups of slot, the fixed cylinder inboard wall slidingly connected has cannula, the cannula surface is equipped with clamping groove, the cannula upper end surface is connected with rubber sleeve, the rubber sleeve other end is connected with sealing ring, the rubber sleeve outer wall is equipped with compression spring, the compression spring one end is fixedly connected with cannula side wall, other end is fixedly connected with sealing ring side wall, by being provided with connecting mechanism, flushing head and external water pipe are connected using the way of plug-in cooperation, without the aid of spanner, screwdriver etc. Special tool, simplify the connection step, improve the docking efficiency of flushing head tool and external pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of coiled tubing operation equipment, and more specifically, it relates to a rotatable flushing head tool for horizontal well coiled tubing. Background Technology

[0002] In oil drilling and production operations, the rotatable flushing head tool for horizontal well coiled tubing is an important downhole operation tool. It is mainly used to remove deposits such as sand plugs, wax plugs, scale, and oil stains accumulated in the horizontal well section through high-pressure flushing. The tool is installed at the end of the coiled tubing, and high-pressure fluid is delivered to the flushing head through the coiled tubing. The nozzle on the flushing head sprays the high-pressure fluid onto the well wall and bottom of the well. With the rotation function, it can achieve all-round cleaning of the wellbore. In horizontal well operations, due to the complex wellbore trajectory and uneven distribution of deposits, the flushing head tool needs to have good throughput and flushing coverage to ensure thorough cleaning of the wellbore and restore the normal production capacity of the oil and gas well.

[0003] However, in existing technologies, flushing head tools need to be connected to external pipelines during use to achieve the delivery of high-pressure fluid and normal operation of the tool. However, the connection methods between existing flushing head tools and external pipelines are usually rudimentary, often using ordinary threaded connections or simple plug-in methods. The connection is not sufficiently sealed, and leakage is prone to occur under high-pressure conditions, resulting in a drop in flushing pressure and affecting the flushing effect. At the same time, the rudimentary connection structure is prone to loosening and falling off due to vibration and impact in the complex environment of the well, posing a risk of the tool falling into the well and creating safety hazards for downhole operations. Utility Model Content

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a rotatable flushing head tool for horizontal well coiled tubing to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A rotatable flushing head tool for horizontal well coiled tubing includes a flushing head and a connecting mechanism. The connecting mechanism includes a fixed cylinder, which is fixedly connected to the flushing head. The surface of the fixed cylinder has multiple sets of slots. An insert tube is slidably connected to the inner side wall of the fixed cylinder. A retaining groove is formed on the surface of the insert tube. A rubber sleeve is connected to the upper end face of the insert tube. A sealing ring is connected to the other end of the rubber sleeve. A compression spring is fitted on the outer side wall of the rubber sleeve. One end of the compression spring is fixedly connected to the side wall of the insert tube, and the other end is fixedly connected to the side wall of the sealing ring.

[0006] Preferably, a sealing strip is provided on the top of the inner wall of the fixed cylinder, and a sealing groove adapted to the sealing strip is opened on the surface of the sealing ring. The sealing strip is embedded in the sealing groove, and a reliable sealing structure is formed by the fitting of the sealing strip and the sealing groove, which effectively prevents high-pressure fluid from leaking at the connection.

[0007] Preferably, the outer wall of the fixed cylinder is slidably connected to an inclined ring, the lower end face of the inclined ring is connected to multiple sets of connecting rods, the other end of the connecting rod is connected to a pull ring, the pull ring is slidably connected to the fixed cylinder, and the pull ring provides a convenient operating position for the operator. Pulling the pull ring can drive the inclined ring to move and thus drive the unlocking action.

[0008] Preferably, two sets of fixing rings are coaxially sleeved on the outer side of the fixing cylinder. The two sets of fixing rings are connected by four sets of connecting blocks, forming a stable outer frame structure with the two sets of fixing rings and connecting blocks, providing a reliable installation foundation for components such as telescopic plates and clamps.

[0009] Preferably, a connecting spring is connected to the inner side wall of the connecting block, and a telescopic plate is connected to the other end of the connecting spring. The telescopic plate is pushed to reset by the elastic force of the connecting spring, so that the locking rod is inserted into the slot after the insertion tube is inserted to achieve locking.

[0010] Preferably, the outer wall of the telescopic plate is connected to two sets of adjusting rods, and the connecting block has two sets of adjusting grooves adapted to the adjusting rods. The adjusting rods are slidably connected to the corresponding adjusting grooves. The sliding cooperation between the adjusting rods and the adjusting grooves provides guiding support for the telescopic plate, ensuring that the telescopic movement of the lever is smooth and reliable.

[0011] Preferably, the inner wall of the telescopic plate is connected to a locking rod, the locking rod is adapted to the locking groove, and the left and right ends of the inner wall of the telescopic plate are connected to abutment rods. The abutment rods are used in conjunction with the inclined ring. The mechanical locking of the tube is achieved by the insertion and cooperation of the locking rod and the locking groove. The cooperation of the abutment rod and the inclined ring converts the pulling action of the pull ring into the lateral extension and retraction of the locking rod to achieve unlocking.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a rotatable flushing head tool for horizontal well coiled tubing, which has the following advantages: By setting a connection mechanism, the flushing head and the external water pipe are connected by a plug-in engagement. During installation, simply pull the pull ring to retract the locking rod, insert the insertion tube into the fixed cylinder until the sealing strip is embedded in the sealing groove, and after releasing the pull ring, the locking rod is inserted into the locking groove under the rebound action of the connecting spring to achieve locking. The entire installation process does not require the use of traditional fasteners such as bolts and screws, nor does it require the use of special tools such as wrenches and screwdrivers, which simplifies the connection steps and improves the docking efficiency between the flushing head tool and the external pipeline.

[0013] When disassembling the external water pipe, the worker only needs to pull the pull ring again. This moves the inclined ring via the connecting rod, squeezing the connecting rod and driving the telescopic plate and locking rod to move outward and disengage from the slot, thus releasing the locking state of the insertion pipe. The insertion pipe can then be pulled out directly to complete the disassembly. The entire process is quick and labor-saving, effectively reducing the labor intensity of on-site workers. The upper end of the insertion pipe is connected to a rubber sleeve, and the other end of the rubber sleeve is connected to a sealing ring. The surface of the sealing ring has a sealing groove that matches the sealing strip. After the insertion pipe is fully inserted, the sealing strip is embedded in the sealing groove to form a reliable sealing fit. The compression spring provides continuous compression force to the rubber sleeve, ensuring that the sealing structure maintains a good sealing effect under high pressure conditions, effectively preventing high-pressure fluid leakage and ensuring stable flushing pressure. After the connection is completed, the connecting spring pushes the telescopic plate and locking rod to reset. The locking rod inserts into the slot to achieve mechanical locking of the insertion pipe. The sliding connection of the adjusting rod in the adjusting groove provides stable guiding support for the telescopic plate, ensuring reliable cooperation between the locking rod and the slot, and effectively ensuring the safety of the flushing operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a rotatable flushing head tool for horizontal well coiled tubing according to the present invention; Figure 2 This is a schematic diagram of the connecting mechanism in this utility model; Figure 3 In this utility model Figure 2 A schematic diagram of the cross-sectional structure; Figure 4 In this utility model Figure 2 A schematic diagram of the exploded structure; Figure 5 This is a schematic diagram of the telescopic plate and the locking rod in this utility model.

[0015] In the diagram: 11. Flushing head; 21. Fixed cylinder; 22. Groove; 23. Insert tube; 24. Slot; 25. Rubber sleeve; 26. Sealing ring; 27. Compression spring; 28. Sealing strip; 29. ​​Sealing groove; 210. Beveled ring; 211. Connecting rod; 212. Pull ring; 213. Fixed ring; 214. Connecting block; 215. Connecting spring; 216. Telescopic plate; 217. Adjusting rod; 218. Adjusting groove; 219. Locking rod; 220. Abutment rod. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0019] Please see Figures 1-5 A rotatable flushing head tool for horizontal well coiled tubing includes a flushing head 11 and a connecting mechanism. The connecting mechanism includes a fixed cylinder 21, which is fixedly connected to the flushing head 11. Multiple sets of slots 22 are formed on the surface of the fixed cylinder 21. An insert tube 23 is slidably connected to the inner wall of the fixed cylinder 21. A groove 24 is formed on the surface of the insert tube 23. A rubber sleeve 25 is connected to the upper end of the insert tube 23. A sealing ring 26 is connected to the other end of the rubber sleeve 25. A compression spring 27 is fitted on the outer wall of the rubber sleeve 25. One end of the compression spring 27 is fixedly connected to the side wall of the insert tube 23, and the other end is fixedly connected to the side wall of the sealing ring 26. A sealing strip 28 is provided at the top of the inner wall of the fixed cylinder 21. A sealing groove 29 adapted to the sealing strip 28 is formed on the surface of the sealing ring 26, and the sealing strip 28 is embedded in the sealing groove 29. A beveled ring 210 is slidably connected to the outer wall of the fixed cylinder 21. Multiple sets of connecting rods 211 are connected to the lower end face of ring 210. The other end of the connecting rod 211 is connected to a pull ring 212. The pull ring 212 is slidably connected to the fixed cylinder 21. Two sets of fixed rings 213 are coaxially sleeved on the outer side of the fixed cylinder 21. The two sets of fixed rings 213 are connected by four sets of connecting blocks 214. A connecting spring 215 is connected to the inner side wall of the connecting block 214. The other end of the connecting spring 215 is connected to a telescopic plate 216. Two sets of adjusting rods 217 are connected to the outer side wall of the telescopic plate 216. Two sets of adjusting grooves 218 adapted to the adjusting rods 217 are opened in the connecting block 214. The adjusting rods 217 are slidably connected to the corresponding adjusting grooves 218. A locking rod 219 is connected to the inner side wall of the telescopic plate 216. The locking rod 219 is adapted to the locking groove 24. Abutting rods 220 are connected to the left and right ends of the inner side wall of the telescopic plate 216. The abutting rods 220 are used in conjunction with the inclined ring 210.

[0020] In this invention, the flushing head 11 and the external water pipe can be quickly installed and disassembled through the connecting mechanism. The insertion tube 23 is fixedly connected to the external water pipe. Specifically, when it is necessary to connect the external water pipe, the insertion tube 23 connected to the end of the external water pipe is inserted into the fixed cylinder 21. Before insertion, the operator first needs to manually pull the pull ring 212. The pull ring 212 drives the inclined ring 210 to slide along the fixed cylinder 21 towards the abutting rod 220 through the connecting rod 211. This causes the inclined end of the inclined ring 210 to press against the abutting rod 220. The abutting rod 220 moves outward from the fixed cylinder 21 under pressure, and the abutting rod 220 pushes the telescopic plate 216. Synchronous movement: The telescopic plate 216 drives the adjusting rod 217 to move outward along the adjusting groove 218, while simultaneously driving the locking rod 219 to retract into the slot 22. The connecting spring 215 is compressed to avoid obstructing the insertion of the insertion tube 23. Then, the insertion tube 23 can be inserted into the fixed cylinder 21 until the sealing strip 28 is embedded in the sealing groove 29. The compression spring 27 is compressed. After the insertion tube 23 is fully inserted, the pull ring 212 can be released. The connecting spring 215 rebounds and pushes the telescopic plate 216 and the locking rod 219 to reset. The locking rod 219 smoothly inserts into the slot 24, locking the insertion tube 23. The inclined ring 210 is also compressed and reset, thus completing the rapid connection of the external water pipe. When it is necessary to disassemble the external water pipe, pull the pull ring 212 again. The pull ring 212 drives the inclined ring 210 to move through the connecting rod 211, which squeezes the abutment rod 220. This drives the abutment rod 220 to move the telescopic plate 216 and the locking rod 219 outward, thereby causing the locking rod 219 to disengage from the slot 24 and release the locking state of the insertion tube 23. At this time, the insertion tube 23 can be pulled out and the external water pipe can be disassembled.

[0021] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents. In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them. Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, so their electrical connection relationships and specific circuit structures will not be elaborated here.

Claims

1. A rotatable flushing head tool for horizontal well coiled tubing, comprising a flushing head (11); and further comprising a connecting mechanism, the connecting mechanism comprising a fixed cylinder (21), characterized in that: The fixed cylinder (21) is fixedly connected to the flushing head (11). The surface of the fixed cylinder (21) has multiple sets of slots (22). The inner wall of the fixed cylinder (21) is slidably connected to the insertion tube (23). The surface of the insertion tube (23) has a slot (24). The upper end of the insertion tube (23) is connected to a rubber sleeve (25). The other end of the rubber sleeve (25) is connected to a sealing ring (26). The outer wall of the rubber sleeve (25) is fitted with a compression spring (27). One end of the compression spring (27) is fixedly connected to the side wall of the insertion tube (23), and the other end is fixedly connected to the side wall of the sealing ring (26).

2. The rotatable flushing head tool for horizontal well coiled tubing according to claim 1, characterized in that: The top of the inner wall of the fixed cylinder (21) is provided with a sealing strip (28), and the surface of the sealing ring (26) is provided with a sealing groove (29) that is adapted to the sealing strip (28). The sealing strip (28) is embedded in the sealing groove (29).

3. The rotatable flushing head tool for horizontal well coiled tubing according to claim 2, characterized in that: The outer wall of the fixed cylinder (21) is slidably connected to an inclined ring (210), and the lower end face of the inclined ring (210) is connected to multiple sets of connecting rods (211). The other end of the connecting rod (211) is connected to a pull ring (212), and the pull ring (212) is slidably connected to the fixed cylinder (21).

4. The rotatable flushing head tool for horizontal well coiled tubing according to claim 3, characterized in that: Two sets of fixing rings (213) are coaxially sleeved on the outside of the fixing cylinder (21), and the two sets of fixing rings (213) are connected by four sets of connecting blocks (214).

5. A rotatable flushing head tool for horizontal well coiled tubing according to claim 4, characterized in that: The inner wall of the connecting block (214) is connected to a connecting spring (215), and the other end of the connecting spring (215) is connected to a telescopic plate (216).

6. A rotatable flushing head tool for horizontal well coiled tubing according to claim 5, characterized in that: The telescopic plate (216) has two sets of adjusting rods (217) connected to its outer side wall. The connecting block (214) has two sets of adjusting grooves (218) adapted to the adjusting rods (217). The adjusting rods (217) are slidably connected to the corresponding adjusting grooves (218).

7. A rotatable flushing head tool for horizontal well coiled tubing according to claim 6, characterized in that: The inner wall of the telescopic plate (216) is connected to a locking rod (219), which is adapted to the locking groove (24). The left and right ends of the inner wall of the telescopic plate (216) are connected to abutment rods (220), which are used in conjunction with the inclined ring (210).

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