Wellhead plugging device for electric pump

Abstract

The invention discloses an electric pump wellhead plugging device, and relates to the technical field of plugging devices, the electric pump wellhead plugging device comprises a shaft, a plugging ball and a plug fixed outside the plugging ball, the plugging ball is provided with a cleaning mechanism, the cleaning mechanism comprises a rotating pipe and a plugging disc arranged below the rotating pipe, the outside of the plugging disc is fixedly provided with a lower rubber disc, and the lower rubber disc is fixedly provided with an upper rubber disc. The pre-plugging device is used for pre-plugging the shaft; through combination of the designed cleaning mechanism and the driving piece, when the driving piece drives the rotating pipe to rotate, the lower rubber disc outside the plugging disc makes contact with the inner wall of the shaft earlier than the plug, a well fluid spraying path is plugged preliminarily, interference of well fluid spraying to the cleaning process is reduced, and bristles can sweep impurities, sand and the like on the surface of the shaft without dead corners; and in cooperation with water flow sprayed out of the nozzle and the outlet pipe, the flushing water flow carries particle impurities to flow into the collecting groove along the inclined face of the inner wall of the plug disc, the influence of the particle impurities on the plug in the follow-up process is reduced, and the plugging effect of the plug on the shaft is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of plugging devices, and specifically relates to an electric pump wellhead plugging device. Background Art

[0002] The electric pump wellhead plugging device is a special emergency rescue device designed for the oilfield electric pump wellhead, mainly used to deal with emergencies such as well blowout and leakage (the cable starts from the downhole submersible oil pump unit and travels upward, finally passing through the sealing structure at the electric pump wellhead and extending to the ground control equipment. Due to complex downhole conditions and aging facilities, etc., well fluid or gas abnormally leaks from the joint between the electric pump wellhead and the cable sealing part. If not disposed of in time, the sand and mud carried by the oil, gas, and water in the wellbore will cause more serious stabbing damage to the damaged part, resulting in complete loss of control of the wellhead), and quickly seals the wellhead through a mechanical structure.

[0003] In the patent of the electric pump wellhead blowout and plugging device disclosed in the patent application number 201210150116.4, it is fixed to the electric pump wellhead collar through the combination of a clamp and a tooth block. During operation, the adjusting bolt is rotated to drive the adjusting nut and the lead screw to move, so that the plug is located directly above the wellhead. Then, the plug is pushed downward by rotating the stud to squeeze the wellhead, realizing the plugging of the wellhead. However, in use, some impurity particles (such as hard sand grains) are likely to adhere to the surface of the wellhead. When the leakage phenomenon starts, the well fluid in the well spurts out with a small amount of liquid from the leakage point of the wellhead. At this time, the well fluid contacts the impurity particles on the wellhead surface. When the plug descends to block the wellhead, the impurity particles are easily stuck between the plug and the wellhead surface, generating gaps and affecting the sealing. Moreover, during the process of the plug moving downward and pressing tightly to block the wellhead, the plug is easily scratched or punctured by the impurity particles, resulting in damage and affecting the sealing effect of the plug on the wellhead again. For this reason, we propose an electric pump wellhead plugging device. Summary of the Invention

[0004] The purpose of the present invention is to provide an electric pump wellhead plugging device to solve the technical problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An electric pump wellhead plugging device, including a wellbore, a plug ball, and a plug fixed outside the plug ball. A cleaning mechanism is arranged on the plug ball, and the cleaning mechanism includes: A rotating pipe and a plug disk arranged below the rotating pipe. A lower rubber disk is fixedly arranged outside the plug disk for pre-plugging the wellbore. A long pipe is fixedly arranged on the rotating pipe. A moving block is slidably arranged on the long pipe. Multiple spray nozzles are formed at the bottom of the moving block. Multiple groups of bristles and outlet pipes are respectively arranged at the bottoms of the moving block and the long pipe for cleaning and spraying the impurity particles adhering to the surface of the wellbore.

[0006] Preferably, two sets of convex plates are fixedly arranged at one end of the moving block, a connecting spring is fixedly arranged between the convex plate and the inner wall of the long tube, and a sealing rubber is fixedly arranged at one end of the long tube.

[0007] Preferably, a wire mesh frame is fixedly arranged on the plugging disc, a sealing bearing is embedded and installed on the wire mesh frame, and a collecting groove is formed in the inner wall of the plugging disc.

[0008] Preferably, a stud is arranged at the top of the plugging ball, an upper tube is fixedly arranged at the top of the rotating tube, a first fluid slip ring is arranged at the top of the upper tube, and a connector one is arranged at the top of the first fluid slip ring.

[0009] Preferably, a driving member for driving the rotating tube to rotate is arranged at the top of the stud, and the driving member includes: A driving motor fixed at the top of the stud and a driven gear sleeved and fixed on the rotating tube, and a driving gear is fixedly arranged at the working end of the driving motor.

[0010] Preferably, a conveying member is arranged on the rotating tube, and the conveying member includes a centrifugal pump fixed on the outer side of the top of the rotating tube, a discharge pipe is arranged at the top of the centrifugal pump, a connecting pipe is arranged at the bottom of the centrifugal pump, and a connector two is fixedly arranged at the end of the connecting pipe; An installation hose is fixedly arranged on the rotating tube, a connecting pipe is arranged at the end of the installation hose, and a lower hose is fixedly arranged at the bottom of the rotating tube; A conductive slip ring is arranged at the top of the stud.

[0011] Preferably, a limiting member is arranged at the top of the stud, and the limiting member includes two sets of L-shaped frames fixed at the top of the stud, a lower screw rod is connected inside the L-shaped frame by threads, and a pressing plate is fixedly arranged at the bottom of the lower screw rod; A runner is sleeved and fixed at the top of the lower screw rod, and a transmission belt is sleeved between the two runners.

[0012] Preferably, two sets of tooth blocks are arranged outside the wellbore, two sets of clamps are arranged outside the tooth blocks, a retaining ring is arranged outside the clamps, and a support shaft is arranged inside the retaining ring.

[0013] Preferably, a main frame is arranged at the top of the support shaft, a threaded ring is slidably arranged inside the main frame, and the bottom of the stud passes through the inside of the threaded ring.

[0014] Preferably, an installation bearing is fixedly arranged on the outer side of the threaded ring, and a horizontal screw rod is arranged inside the installation bearing.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) By combining the designed cleaning mechanism with the driving part, when the driving part drives the rotating pipe to rotate, the lower rubber disk outside the plug disk contacts the inner wall of the wellbore prior to the plug head, initially sealing the jet path of the well fluid, reducing the interference of the well fluid jet on the cleaning process. The brush hairs can sweep the impurities and sand grains on the surface of the wellbore without dead angles. In combination with the water flow ejected from the nozzle and the outlet pipe, a dual cleaning effect of mechanical sweeping and water flushing is formed, thoroughly removing the attached particulate impurities. During the rotation process, the flushing water flow carries the particulate impurities and flows into the collection tank along the inclined surface of the inner wall of the plug disk, preventing the impurities from staying in the wellbore, creating a clean environment for the subsequent pressing and sealing of the plug head, reducing the influence of the particulate impurities on the plug head subsequently, and increasing the plugging effect of the plug head on the wellbore.

[0016] (2) Through the designed conveying part, the centrifugal pump is used to extract the cleaned particulate impurities and water, avoiding the influence of particulate residue on the sealing. When the cleaning of the particulate impurities is completed and the well is initially plugged by the plug head, the connecting pipe can be pulled out from the second joint and connected to the grouting equipment to inject mortar into the plug disk, forming a dual sealing structure of "flexible emergency plugging and rigid permanent reinforcement" in the wellbore, improving the immediate plugging effect, effectively dealing with the problem of seal failure caused by the aging of rubber components during long-term use, and reducing the subsequent maintenance and replacement requirements.

[0017] (3) Through the designed limiting part, during the grouting into the wellbore and the downward rotation of the stud, the two groups of pressing plates press the driving gear downward, thereby restricting the rotation of the rotating pipe, increasing the stability during grouting and the rotation of the stud, and also avoiding the influence caused by the accidental start of the driving motor resulting in the rotation of the rotating pipe, further increasing the plugging effect on the wellbore. Description of the Drawings

[0018] Figure 1 is the structural schematic diagram of the present invention; Figure 2 is of the present invention Figure 1 enlarged structural schematic diagram of part A; Figure 3 is the structural schematic diagram of the driving part of the present invention; Figure 4 is the upward view structural schematic diagram of the plug head and the lower rubber disk of the present invention; Figure 5 is the structural schematic diagram of the plug disk of the present invention; Figure 6 is the sectional structural schematic diagram of the long pipe of the present invention; Figure 7 is the upward view structural schematic diagram of the moving block and the sealing rubber of the present invention; Figure 8 is the sectional structural schematic diagram of the rotating pipe of the present invention; Figure 9 is the structural schematic diagram of the main frame and the wellbore of the present invention; In the figure: 100, clamp; 101, tooth block; 102, wellbore; 103, plug; 104, plug ball; 105, stud; 106, main frame; 107, horizontal screw rod; 108, support shaft; 109, retaining ring; 200, lower rubber disc; 201, drive motor; 202, driving gear; 203, first fluid slip ring; 204, connector one; 205, rotating pipe; 206, driven gear; 207, upper pipe; 208, plug disc; 209, moving block; 210, long pipe; 211, wire mesh; 212, sealed bearing; 213, lower hose; 214, connecting spring; 215, convex plate; 216, outlet pipe; 217, sealing rubber; 218, brush hair; 219, nozzle; 300, conductive slip ring; 301, discharge pipe; 302, centrifugal pump; 303, connecting pipe; 304, connector two; 305, installation hose; 400, L-shaped frame; 401, lower screw rod; 402, transmission belt; 403, pressing plate. Detailed implementation manners

[0019] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0020] Please refer to Figures 1-8 , the present invention provides a technical solution: an electric pump wellhead leak plugging device, including a wellbore 102, a plug ball 104, and a plug 103 fixed outside the plug ball 104. The plug 103 is a semi-circular structure and is made of rubber material (since the cable is connected to the external control equipment from the wellhead on the wellbore 102, the cable is pressed by the plug 103 and the lower rubber disc 200. At this time, the rubber plug 103 and the lower rubber disc 200 squeeze the cable to fill and seal the gap between the cable and the wellbore 102). A cleaning mechanism is arranged on the plug ball 104. The cleaning mechanism includes a rotating pipe 205 and a plug disc 208 arranged below the rotating pipe 205. The bottom inner wall of the plug disc 208 and the collection tank form an inclined plane, and the inclined plane inclines towards the collection tank, which is convenient for the flushing water and impurity particles to flow into the collection tank. The lower rubber disc 200 is fixedly arranged outside the plug disc 208. When the stud 105 rotates downward, it will drive the plug ball 104, the plug 103, the plug disc 208, the lower rubber disc 200 and other structures to descend together. Then, the lower rubber disc 200 on the plug disc 208 will first enter the wellbore 102 to block the liquid sprayed out of the leak point to the outside of the wellbore 102, which is convenient for subsequent cleaning of the impurity particles attached to the wellhead position at the top of the wellbore 102; A long tube 210 is fixedly arranged on the rotating tube 205. Two groups of conveying grooves are formed inside the rotating tube 205. The right end of the long tube 210 is in communication with the conveying groove on the left side inside the rotating tube 205. At this time, the moving block 209, the long tube 210, the conveying groove on the left side inside the rotating tube 205 and the upper tube 207 are in communication with each other. The installation hose 305, the conveying groove on the right side inside the rotating tube 205, and the lower hose 213 are in communication with each other. A moving block 209 is slidably arranged on the long tube 210. A plurality of spray nozzles 219 are formed at the bottom of the moving block 209. A plurality of brush hairs 218 and outlet pipes 216 are respectively arranged at the bottoms of the moving block 209 and the long tube 210. When the brush hairs 218 rotate following the moving block 209, they can clean and sweep the impurity particles adhering to the upper surface of the wellbore 102. Then, the water sprayed out by the spray nozzles 219 and the outlet pipes 216 is used to wash the impurity particles adhering to the upper surface and the inner wall of the wellbore 102. At this time, the washing water flows downward to drive the impurity particles to flow into the collection groove in the plug plate 208; Two convex plates 215 are fixedly arranged at one end of the moving block 209. A connecting spring 214 is fixedly arranged between the convex plates 215 and the inner wall of the long tube 210. After the brush hairs 218 on the moving block 209 sweep the impurity particles on the upper surface of the wellbore 102, when the moving block 209 moves downward, since the bottom on the left side of the moving block 209 is an inclined surface, and then after the inclined surface contacts the upper part of the wellbore 102, the moving block 209 moves to the right into the long tube 210, and the connecting spring 214 starts to be compressed. A sealing rubber 217 is fixedly arranged at one end of the long tube 210. When the moving block 209 moves in the left-right direction, the sealing rubber 217 is used to increase the sealing performance between the moving block 209 and the long tube 210, so as to prevent the water in the long tube 210 from leaking out from the gap between the moving block 209 and the long tube 210, and the sealing rubber 217 is located outside the moving block 209; A grid 211 is fixedly arranged on the plug plate 208. A sealing bearing 212 is embedded and installed on the grid 211. Through the sealing bearing 212, after the lower rubber disc 200 moves downward into the wellbore 102, due to the frictional force between the lower rubber disc 200 and the inner wall of the wellbore 102, the lower rubber disc 200 will not rotate, while the rotating tube 205 can rotate freely. The bottom of the rotating tube 205 passes through the inside of the sealing bearing 212. A collection groove is formed at the bottom of the inner wall of the plug plate 208; A stud 105 is provided at the top of the plug ball 104. The top of the rotating pipe 205 passes through the inside of the plug 103, the plug ball 104 and the stud 105 and extends to the outside of the top of the stud 105. A mechanical bearing is provided inside the plug ball 104, and the mechanical bearing is sleeved outside the rotating pipe 205, which can increase the sealing performance between the rotating pipe 205 and the plug ball 104 after the plug 103 blocks the top of the wellbore 102. A upper pipe 207 is fixedly provided at the top of the rotating pipe 205. A first fluid slip ring 203 is provided at the top of the upper pipe 207. The stationary end inside the first fluid slip ring 203 is connected to the connector one 204, and the external rotating end is connected to the upper pipe 207. A connector one 204 is provided at the top of the first fluid slip ring 203, and the connector one 204 is connected to an external water supply pipe. Embodiment 2

[0021] On the basis of Embodiment 1, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 8 , a driving member for driving the rotation of the rotating pipe 205 is provided at the top of the stud 105. The driving member includes: A driving motor 201 fixed to the top of the stud 105 and a driven gear 206 sleeved and fixed on the rotating pipe 205. The driving motor 201 can drive the rotating pipe 205 to rotate. A driving gear 202 is fixedly provided at the working end of the driving motor 201, and the driving gear 202 meshes with the driven gear 206.

[0022] By combining the designed cleaning mechanism and the driving member, when the driving member drives the rotating pipe 205 to rotate, the lower rubber disk 200 outside the plug disk 208 contacts the inner wall of the wellbore 102 prior to the plug 103, initially blocking the well fluid ejection path, reducing the interference of the well fluid ejection on the cleaning process. The brush bristles 218 can sweep the impurities such as sand grains on the surface of the wellbore 102 without dead angles of 360 degrees. Cooperating with the water flow ejected from the nozzle 219 and the outlet pipe 216, a double cleaning effect of mechanical sweeping and water flushing is formed, thoroughly removing the attached particulate impurities. During the rotation process, the flushing water flow carries the particulate impurities and flows into the collection tank along the inclined surface of the inner wall of the plug disk 208, avoiding the retention of impurities in the wellbore 102, creating a clean environment for the subsequent pressing and sealing of the plug 103, reducing the influence of the particulate impurities on the plug 103 subsequently, and increasing the plugging effect of the plug 103 on the wellbore 102.

[0023] In summary, when there is a leak at the junction of the sealing structure and the cable in the wellbore 102, at the beginning, a small amount of well fluid in the wellbore 102 sprays outwards from the leak. At this time, the leak is blocked. When blocking, the two groups of rotating rods on the stud 105 are rotated downward, driving the stud 105 to rotate downward. At this time, the stud 105 drives the plug ball 104, the plug head 103, the rotating pipe 205, the wire mesh frame 211, the plug disc 208, and the lower rubber disc 200 to rotate and move downward. Then the bottom of the lower rubber disc 200 contacts the inner wall of the wellbore 102. At this time, as the stud 105 continues to rotate downward, the lower rubber disc 200 contacts the inner wall of the wellbore 102 and continues to move downward. After the lower rubber disc 200 contacts the inner wall of the wellbore 102, due to the frictional force between the lower rubber disc 200 and the wellbore 102, the lower rubber disc 200 will only move downward and will not rotate (at this time, the lower rubber disc 200 pre-blocks the inside of the wellbore 102 to prevent the well fluid from spraying outwards). When the lower rubber disc 200 moves downward into the wellbore 102, the drive motor 201 is started. The working end of the drive motor 201 rotates to drive the driving gear 202 to rotate. The driving gear 202 drives the driven gear 206 engaged with it and the rotating pipe 205 to rotate. The rotating pipe 205 drives the long pipe 210 and the moving block 209 to rotate. Then, when the multiple groups of bristles 218 on the left inclined surface of the moving block 209 contact the upper surface of the wellbore 102, the stud 105 stops rotating. At this time, the lower rubber disc 200 will not continue to move downward. Then the rotating bristles 218 sweep the impurity particles attached to the upper surface of the wellbore 102. At the same time, the spray nozzle 219 and the outlet pipe 216 spray flushing water to flush the impurity particles attached to the upper surface of the wellbore 102 and the inner wall of the wellbore 102. The flushing water carries the impurity particles and flows downward, carrying the impurity particles on the inner wall of the wellbore 102 and flowing downward together. Then it flows into the inside of the plug disc 208 and into the collection tank to clean the impurity particles attached to the surface of the wellbore 102. When the cleaning is completed, the drive motor 201 is turned off. Then the long pipe 210 and the moving block 209 stop rotating. At this time, the stud 105 is rotated downward again, driving the structures such as the lower rubber disc 200, the plug ball 104, the plug head 103, and the plug disc 208 to rotate and move downward. At this time, the left inclined surface of the moving block 209 contacts the upper surface of the wellbore 102. As the moving block 209 continues to descend, the left end of the moving block 209 moves towards the inside of the long pipe 210, driving the convex plate 215 to move to the right. At this time, the connecting spring 214 is affected and starts to compress. Then the left end of the moving block 209 contacts the inner wall of the wellbore 102 and continues to move downward. Subsequently, the bottom of the downward-moving plug head 103 contacts and compresses the wellbore 102 to block the wellbore 102. Embodiment III

[0024] On the basis of Embodiment II, please refer to Figure 1 、 Figure 2 、Figure 3 , Figure 5 and Figure 8 , a conveying member is provided on the rotary pipe 205. The conveying member includes a centrifugal pump 302 fixed to the outer side of the top of the rotary pipe 205. The centrifugal pump 302 can extract the water and impurity particles entering the collection tank for flushing together. A discharge pipe 301 is provided at the top of the centrifugal pump 302, and a connecting pipe 303 is provided at the bottom of the centrifugal pump 302. A second joint 304 is fixedly provided at the end of the connecting pipe 303. An installation hose 305 is fixedly provided on the rotary pipe 205. A connecting pipe is provided at the end of the installation hose 305, and the end of the connecting pipe penetrates into the inside of the second joint 304. A lower hose 213 is fixedly provided at the bottom of the rotary pipe 205; A conductive slip ring 300 is provided at the top of the stud 105. The centrifugal pump 302 during rotation can be powered through the conductive slip ring 300. The stationary end of the conductive slip ring 300 is connected to the wire for transmitting power outside, and the rotating end is connected to the centrifugal pump 302. And two groups of support rods are fixedly provided between the bottom of the conductive slip ring 300 and the stud 105.

[0025] Through the designed conveying member of the present invention, the centrifugal pump 302 is used to extract the cleaned particulate impurities and water, avoiding the influence of particle residue on the seal. After the particulate impurities are cleaned and initially blocked by the plug 103, the connecting pipe can be pulled out from the second joint 304 and connected to the grouting equipment to inject mortar into the plugging disc 208, forming a double-seal structure of "flexible emergency plugging and rigid permanent reinforcement" in the shaft 102, improving the immediate plugging effect, and also effectively coping with the seal failure problem caused by the aging of rubber components during long-term use, reducing the subsequent maintenance and replacement requirements.

[0026] In summary, when the flushing water mixed with impurity particles flows into the collection tank in the plugging disc 208, by starting the centrifugal pump 302, the centrifugal pump 302 generates suction on the lower hose 213 below the rotary pipe 205 to extract the water and impurity particles entering the collection tank. The water and impurity particles pass through the rotary pipe 205, the conveying groove on the right side inside the rotary pipe 205, the installation hose 305, the connecting pipe 303 in sequence and then enter the centrifugal pump 302, and then are discharged outward through the discharge pipe 301, so that the water and impurity particles entering the collection tank can be discharged outward while cleaning; After the impurity particles are cleaned up and discharged completely, when the plug 103 blocks the wellbore 102, pull out the connecting pipe on the installation hose 305 from the second joint 304, and then install the connecting pipe at the discharge pipe of the grouting equipment. At this time, the grouting equipment injects mortar into the conveying groove on the right side inside the rotating pipe 205 from the installation hose 305, and then injects it into the plugging plate 208 through the lower hose 213 (the mortar is a cement-based gelling material). Then, the mortar entering the plugging plate 208 increases and fills the plugging plate 208 and the position above the plugging plate 208. After injecting the appropriate mortar, stop grouting. At this time, after the mortar solidifies, the wellbore 102 can be plugged again (for long-term plugging), so that a secondary plugging is formed between the lower rubber plate 200 and the plug 103, increasing the plugging effect on the wellbore 102 and also avoiding the situation that the lower rubber plate 200 and the plug 103 need to be replaced when they are aged and damaged later. Example 4

[0027] On the basis of Example 3, please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 8 and Figure 9 , a limiting member is provided at the top of the stud 105. The limiting member includes two groups of L-shaped frames 400 fixed to the top of the stud 105. A lower screw rod 401 is connected inside the L-shaped frame 400 by threads. A pressing plate 403 is fixedly provided at the bottom of the lower screw rod 401. After the pressing plate 403 moves downward to limit the driving gear 202, when grouting into the wellbore 102 or when the stud 105 rotates downward, the rotating pipe 205 can rotate along with the rotation of the rotating pipe 205, avoiding the self-rotation of the rotating pipe 205 or the accidental start of the driving motor 201 causing the rotation of the rotating pipe 205; A runner is sleeved and fixed at the top of the lower screw rod 401, and a transmission belt 402 is sleeved between the two runners. Through the transmission belt 402, the two lower screw rods 401 can rotate synchronously; Through the designed limiting member of the present invention, during grouting into the wellbore 102 and during the downward rotation of the stud 105, the two pressing plates 403 press the driving gear 202 downward, thereby restricting the rotation of the rotating pipe 205, increasing the stability during grouting and the rotation of the stud 105, and also avoiding the influence caused by the accidental start of the driving motor 201 resulting in the rotation of the rotating pipe 205, further increasing the plugging effect on the wellbore 102.

[0028] In summary, during grouting into the wellbore 102, during the downward rotation of the stud 105, or to avoid the impact caused by accidental start-up of the drive motor 201, one of the two lower screws 401 in the two groups of lower screws 401 is rotated downward, driving the rotation of the runner outside the lower screw 401, and then driving the rotation of the runner on the other group of lower screws 401 through the transmission belt 402. At this time, the other group of lower screws 401 also rotates synchronously. At this time, the two rotating pressure plates 403 both move downward, and the two pressure plates 403 contact and press the driving gear 202, limiting the rotation of the rotating pipe 205 and preventing the rotating pipe 205 from rotating. Moreover, the two pressure plates 403 respectively press and limit the top of the driving gear 202 near the front and near the back, and the force pressing the driving gear 202 is balanced and consistent, avoiding the increase in local contact stress on the side where the driving gear 202 is pressed unilaterally, resulting in overload on the pressed side and deformation of the driving gear 202.

[0029] In this embodiment, the principle of adjusting the plug 103 to be above the wellbore 102 and installing the clamp 100 on the wellbore 102 has been disclosed in the patent application No. 201210150116.4. There are two groups of tooth blocks 101 outside the wellbore 102, and two groups of clamps 100 are arranged outside the tooth blocks 101. The front and back of the two groups of clamps 100 are fixedly connected by mounting bolts (the two groups of clamps 100 are fixed together). There is a retaining ring 109 outside the clamp 100, and the retaining ring 109 and the support shaft 108 are fixedly connected by two fixing bolts. Loosening the fixing bolts can make the support shaft 108 rotate in the retaining ring 109 to change the position of the main frame 106, and the support shaft 108 is arranged inside the retaining ring 109.

[0030] In this embodiment, a main frame 106 is arranged at the top of the support shaft 108, and a threaded ring is slidably arranged inside the main frame 106. The bottom of the stud 105 passes through the inside of the threaded ring, and the stud 105 is threadedly connected with the threaded ring.

[0031] In this embodiment, an installation bearing is fixedly arranged on the outer side of the threaded ring, and a cross screw 107 is arranged inside the installation bearing. By rotating the cross screw 107, the threaded ring outside the stud 105 can move left or right in the main frame 106. The end of the cross screw 107 extends to the outside of the main frame 106, and the cross screw 107 is threadedly connected with the main frame 106. Two rotating rods are fixedly arranged on the outer side of the top of the stud 105.

[0032] The above embodiments are only used to illustrate the technical method of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. An electric pump wellhead leakage plugging device, comprising a wellbore (102), a plugging ball (104), and a plug head (103) fixed outside the plugging ball (104), wherein a cleaning mechanism is arranged on the plugging ball (104), and is characterized in that, The cleaning mechanism includes: a rotating pipe (205) and a plugging disk (208) arranged below the rotating pipe (205). An outer rubber disk (200) is fixedly arranged outside the plugging disk (208) for pre-blocking the inside of the wellbore (102); a long pipe (210) is fixedly arranged on the rotating pipe (205). A moving block (209) is slidably arranged on the long pipe (210). A plurality of spray nozzles (219) are formed at the bottom of the moving block (209). A plurality of brush hairs (218) and outlet pipes (216) are respectively arranged at the bottoms of the moving block (209) and the long pipe (210) for cleaning and spraying the impurity particles attached to the surface of the wellbore (102); 2. The electric pump wellhead leak stoppage device according to claim 1, characterized in that: two convex plates (215) are fixedly arranged at one end of the moving block (209). A connecting spring (214) is fixedly arranged between the convex plates (215) and the inner wall of the long pipe (210). A sealing rubber (217) is fixedly arranged at one end of the long pipe (210); 3. The electric pump wellhead leak plugging device according to claim 1, characterized in that: a grid (211) is fixedly arranged on the plugging disk (208). A sealing bearing (212) is embedded and installed on the grid (211). A collecting groove is formed in the inner wall of the plugging disk (208); 4. The electric pump wellhead leak plugging device according to claim 1, characterized in that: a stud (105) is arranged at the top of the plugging ball (104). An upper pipe (207) is fixedly arranged at the top of the rotating pipe (205). A first fluid slip ring (203) is arranged at the top of the upper pipe (207). A connector one (204) is arranged at the top of the first fluid slip ring (203); 5. The electric pump wellhead leak plugging device according to claim 4, characterized in that: a driving member for driving the rotation of the rotating pipe (205) is arranged at the top of the stud (105). The driving member includes: a driving motor (201) fixed at the top of the stud (105) and a driven gear (206) sleeved and fixed on the rotating pipe (205). A driving gear (202) is fixedly arranged at the working end of the driving motor (201); 6. The electric pump wellhead plugging device according to claim 5, characterized in that: a conveying member is arranged on the rotating pipe (205). The conveying member includes a centrifugal pump (302) fixed on the outer side of the top of the rotating pipe (205). A discharge pipe (301) is arranged at the top of the centrifugal pump (302). A connecting pipe (303) is arranged at the bottom of the centrifugal pump (302). A connector two (304) is fixedly arranged at the end of the connecting pipe (303); an installation hose (305) is fixedly arranged on the rotating pipe (205). A connecting pipe is arranged at the end of the installation hose (305). A lower hose (213) is fixedly arranged at the bottom of the rotating pipe (205); a conductive slip ring (300) is arranged at the top of the stud (105); 7. The electric pump wellhead plugging device according to claim 4, characterized in that: a limiting member is arranged at the top of the stud (105). The limiting member includes two L-shaped frames (400) fixed at the top of the stud (105). A lower screw rod (401) is threadedly connected inside the L-shaped frames (400). A pressing plate (403) is fixedly arranged at the bottom of the lower screw rod (401); a runner is sleeved and fixed at the top of the lower screw rod (401), and a transmission belt (402) is sleeved between the two runners.

8. The electric pump wellhead plugging device according to claim 1, characterized in that: There are two sets of inserts (101) arranged outside the wellbore (102). There are two sets of clamps (100) arranged outside the inserts (101). There is a retaining ring (109) arranged outside the clamps (100). There is a support shaft (108) arranged inside the retaining ring (109).

9. The electric pump wellhead plugging device according to claim 8, wherein: There is a main frame (106) arranged at the top of the support shaft (108). A threaded ring is slidably arranged inside the main frame (106). The bottom of the stud (105) passes through the inside of the threaded ring.

10. The electric pump wellhead leak plugging device according to claim 9, characterized in that: An installation bearing is fixedly arranged on the outer side of the threaded ring, and a cross screw rod (107) is arranged inside the installation bearing.

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