Well wall grouting water control tool penetrating through freezing pipe and method of well wall grouting water control tool

Abstract

The invention discloses a well wall grouting and water control tool and method penetrating through a freezing pipe, and relates to the technical field of grouting and water control. The well wall grouting and water control tool comprises a slurry pump and a pump-out cabin, the bottom end of the pump-out cabin is fixedly connected with a slurry input cabin, and the top end of the slurry input cabin is provided with a slurry pump inlet corresponding to the pump-out cabin; the directional drilling technology is applied to the coal mine well wall post-grouting water prevention and control industry under the complex environmental condition, the drilling machine is arranged at the position, where construction of a shaft tower is not affected, around a shaft, the drilling machine is arranged, and the drilling machine is arranged at the position, where construction of a shaft tower is not affected, of the shaft tower. The directional drilling technology is applied to the coal mine well wall post-grouting water prevention and control industry. The problems that well mouth time is occupied by water control behind the shaft wall, the construction period of a main shaft building line is affected, procedures are tedious, efficiency is low, cost is high, the treatment effect is not ideal and the like are solved, meanwhile, reasonable grouting pressure is adopted, the well wall is not damaged while the filling and water plugging effect is guaranteed, and well wall water outlet treatment through ground grouting under the complex environment condition is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of grouting water control, and in particular to a well wall grouting water control tool passing through a freezing pipe and a method thereof. Background Art

[0002] Directional drilling technology refers to the use of technical means such as deflection and guidance to make the borehole drilled according to a pre-set trajectory. Directional drilling technology originated in the petroleum industry. At present, directional drilling technology is widely used in oil and gas drilling, geological exploration and other fields, and its application in engineering survey is also gradually being promoted.

[0003] Directional drilling is completed using flexible drilling tools combined with screw drilling tools and high-precision inclinometers;

[0004] However, the existing technology cannot achieve a predetermined orientation and achieve a 90-degree horizontal drilling, and the success rate in actual operation is only 70%-80%, and the drilling rig distance of the longest horizontal grouting section is relatively short, and the long-distance horizontal grouting section in the actual drilling is prone to collapse. Therefore, the present invention provides a well wall grouting water control tool and method that passes through a freezing pipe. Summary of the invention

[0005] In view of the problems existing in the above-mentioned existing well wall grouting water control tools and methods that pass through freezing pipes, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a well wall grouting water control tool and method that passes through a freezing pipe to solve the above-mentioned problems.

[0007] The present invention provides the following technical solutions: a well wall grouting water control tool and method for passing through a freezing pipe, comprising a mud pump and a pump outlet cabin, the bottom end of the pump outlet cabin is fixedly connected to a mud input cabin, the top of the mud input cabin is provided with a mud pump inlet corresponding to the pump outlet cabin, the mud input cabin is located at an end away from the mud pump and is fixedly welded with a mud extrusion end, both sides of the top of the mud input cabin are welded with sealed cleaning pipes, one end of the mud input cabin is fixedly connected to a cleaning cover, the other end of the mud input cabin is fixedly connected to a fixed cover, the fixed cover is located at an end away from the mud pump and is fixedly connected to a rotating support block, the rotating support block is connected to a sealing cover by a hinge, the sealing cover can rotate around the rotating support block, the fixed cover is located at the other end of the rotating support block and is provided with a fixing bolt, the sealing cover and the fixing cover are fixedly connected by the fixing bolt.

[0008] Among them, a breathable drainage pipe is fixedly welded to the bottom side of the cleaning cover at one end away from the sealing cover, and the breathable drainage pipe is connected to the inner wall of the mud input cabin. The inner wall of the mud input cabin is provided with a cleaning rod, and the cleaning rod is located at one end of the cleaning cover and is fixedly connected to a first cleaning partition block, and the middle part of the cleaning rod and the outer wall of one side of the sealing cover are fixedly sleeved with a second cleaning partition block, and the breathable drainage pipe and the sealed cleaning pipe are both fixedly connected with covers for sealing.

[0009] The outer walls of the first cleaning partition block and the second cleaning partition block are both sleeved with rubber gaskets, and the first cleaning partition block and the second cleaning partition block are both located on the inner wall of the mud input cabin and are movably sleeved with the mud input cabin.

[0010] Among them, when the first cleaning partition block is located in the mud input cabin, it is located between the sealed cleaning tube at the top of the cleaning cover and the cleaning cover, and when the second cleaning partition block is located in the mud input cabin, it is located between the sealed cleaning tube at the top of the sealing cover and the sealing cover.

[0011] S1. Preparation for drilling: First, select a suitable location for the drilling rig near the wellhead, determine the coordinates of the hole and the grouting treatment section points, and design the drilling trajectory in combination with the actual position map of the freezing pipe to determine the actual drilling position;

[0012] S2. Combined drilling tools: After the inclined well drilling rig is assembled and the ordinary screw drilling tools are installed, drilling is carried out. When drilling, the screw drill uses the drilling fluid as the power to convert the hydraulic pressure into mechanical energy for drilling. When drilling, after drilling 30-40 meters, a high-precision inclinometer is used to measure the trajectory of the drilling. If the measured trajectory is the same as the designed trajectory, drilling will continue. If there is a deviation in the trajectory, it needs to be corrected. After the correction is completed, drilling will continue;

[0013] S3. Replacement of drilling tools: After drilling to the designated position according to the drilling design trajectory, it is necessary to perform oblique drilling. In this case, the drilling tools need to be replaced. The rotary drill is combined with the directional drill to make an oblique drill. When drilling, a mud pump is used to pump chemical mud into the borehole. The prepared chemical mud is used as the drilling fluid, so that the borehole is drilled according to the designed trajectory through the gap of the freezing pipe and into the designed grouting area outside the well wall;

[0014] S4. At this time, grouting operation is carried out. In order to improve the grouting effect, the drilling speed is controlled to maintain an appropriate grouting pressure during grouting. Under the action of grouting pressure, the slurry is injected from the ground through the grouting holes to seal the water channels outside the well wall. The grouting pressure is controlled during grouting to ensure that the slurry completely fills the well wall without damaging it. At the same time, all the grouting holes successfully pass through the gaps in the freezing pipes to reach the designed positions outside the well wall.

[0015] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0016] 1. The present invention applies directional drilling technology to the industry of grouting water prevention and control behind the coal mine shaft wall under complex environmental conditions, arranges drilling rigs around the shaft without affecting the construction of the shaft tower, and adopts a method of combining rotary drilling and downhole power drilling tools to make inclined drilling, making full use of the flexibility of the drill rod, supplemented by advanced high-precision directional inclinometers and carefully formulated drilling fluids, so that the borehole passes through the gaps in the frozen pipes left over from the freezing project during well construction, enters the gap position outside the shaft wall, and grouting is used to block the water-conducting gaps to control water outflow behind the shaft wall. This method solves the problems of water prevention and control behind the shaft wall occupying the wellhead time, affecting the main line construction period, complicated procedures, low efficiency, high cost, and unsatisfactory control effect. At the same time, a reasonable grouting pressure is adopted to ensure the filling and water blocking effect without causing damage to the shaft wall, so as to achieve ground grouting to control water outflow from the shaft wall under complex environmental conditions.

[0017] 2. The present invention simplifies the cleaning process, improves the cleaning efficiency, and ensures the long-term stable operation of the mud pump by filling the cleaning liquid and pulling the cleaning rod back and forth to clean the residual mud in the mud input chamber without removing the cleaning cover.

[0018] 3. The present invention can arrange the drilling rig around the wellbore without affecting the well tower construction, thereby making full use of limited space resources. By combining rotary drilling and downhole power drilling tools to make inclined drilling, as well as the flexibility of the drill rod, the drill hole can accurately pass through the gap of the freezing pipe and enter the gap position outside the well wall, thereby improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the mud input cabin of the present invention;

[0022] Figure 3 This is a schematic diagram of the back structure of the mud input cabin of the present invention;

[0023] Figure 4 It is a schematic diagram of the decomposition structure of the mud input cabin of the present invention;

[0024] Figure 5 It is a schematic diagram of the drilling position of the present invention;

[0025] Figure 6 It is a schematic diagram of the drilling trajectory of the present invention.

[0026] Description of reference numerals:

[0027] 1. Mud pump; 2. Pump out of the cabin; 3. Mud input cabin; 301. Mud pump inlet; 302. Sealed cleaning pipe; 303. Mud squeezing end; 304. Cleaning cover; 305. Fixed cover; 306. Rotating support block; 307. Sealing cover; 308. Fixed bolt; 309. Cleaning rod; 3091. First cleaning partition block; 3092. Second cleaning partition block; 3010. Breathable drainage pipe. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] The embodiment of the invention discloses a well wall grouting water control tool and a method thereof that penetrates a freezing pipe.

[0030] The present invention provides Figure 1-6 The tool and method for grouting water control in a well wall through a frozen pipe shown in the figure comprises a mud pump 1 and a pump out cabin 2, wherein the bottom end of the pump out cabin 2 is fixedly connected to a mud input cabin 3, the top end of the mud input cabin 3 is provided with a mud pump inlet 301 corresponding to the pump out cabin 2, the mud input cabin 3 is located at an end away from the mud pump 1 and is fixedly welded with a mud extrusion end 303, both sides of the top end of the mud input cabin 3 are welded with sealed cleaning pipes 302, and one end of the mud input cabin 3 is fixedly connected to a cleaning cover 30 4. The other end of the mud input cabin 3 is fixedly connected with a fixing cover 305. The fixing cover 305 is located at an end away from the mud pump 1 and is fixedly connected with a rotating support block 306. The rotating support block 306 is connected with a sealing cover 307 through a hinge. The sealing cover 307 can rotate around the rotating support block 306. The other end of the fixing cover 305 located at the rotating support block 306 is provided with a fixing bolt 308. The sealing cover 307 and the fixing cover 305 are fixedly connected through the fixing bolt 308.

[0031] Among them, a breathable drainage pipe 3010 is fixedly welded on the bottom side of the cleaning cover 304 at one end away from the sealing cover 307, and the breathable drainage pipe 3010 is connected to the inner wall of the mud input cabin 3. The inner wall of the mud input cabin 3 is provided with a cleaning rod 309, and the cleaning rod 309 is located at one end of the cleaning cover 304 and is fixedly connected to a first cleaning partition block 3091. The middle part of the cleaning rod 309 and the outer wall of one side of the sealing cover 307 are fixedly sleeved with a second cleaning partition block 3092. The breathable drainage pipe 3010 and the sealed cleaning pipe 302 are both fixedly connected with covers for sealing.

[0032] The outer walls of the first cleaning partition block 3091 and the second cleaning partition block 3092 are both sleeved with rubber gaskets, and the first cleaning partition block 3091 and the second cleaning partition block 3092 are both located on the inner wall of the mud input cabin 3 and are movably sleeved with the mud input cabin 3.

[0033] Among them, when the first cleaning partition block 3091 is located in the mud input cabin 3, it is located between the sealed cleaning tube 302 at the top of the cleaning cover 304 and the cleaning cover 304, and when the second cleaning partition block 3092 is located in the mud input cabin 3, it is located between the sealed cleaning tube 302 at the top of the sealing cover 307 and the sealing cover 307.

[0034] S1. Preparation for drilling: First, select a suitable location for the drilling rig near the wellhead, determine the coordinates of the hole and the grouting treatment section points, and design the drilling trajectory in combination with the actual position map of the freezing pipe to determine the actual drilling position;

[0035] S2. Combined drilling tools: After the inclined well drilling rig is assembled and the ordinary screw drilling tools are installed, drilling is carried out. When drilling, the screw drill uses the drilling fluid as the power to convert the hydraulic pressure into mechanical energy for drilling. When drilling, after drilling 30-40 meters, a high-precision inclinometer is used to measure the trajectory of the drilling. If the measured trajectory is the same as the designed trajectory, drilling will continue. If there is a deviation in the trajectory, it needs to be corrected. After the correction is completed, drilling will continue;

[0036] S3. Replacement of drilling tools: After drilling to the designated position according to the drilling design trajectory, it is necessary to perform oblique drilling. In this case, the drilling tools need to be replaced. The rotary drill is combined with the directional drill to make an oblique drill. When drilling, a mud pump is used to pump chemical mud into the borehole. The prepared chemical mud is used as the drilling fluid, so that the borehole is drilled according to the designed trajectory through the gap of the freezing pipe and into the designed grouting area outside the well wall;

[0037] S4. At this time, grouting operation is carried out. In order to improve the grouting effect, the drilling speed is controlled to maintain an appropriate grouting pressure during grouting. Under the action of grouting pressure, the slurry is injected from the ground through the grouting holes to seal the water channels outside the well wall. The grouting pressure is controlled during grouting to ensure that the slurry completely fills the well wall without damaging it. At the same time, all the grouting holes successfully pass through the gaps in the freezing pipes to reach the designed positions outside the well wall.

[0038] How it works

[0039] After the mud pump 1 is used up and does not need to be used again, the traditional way is to disassemble the cleaning cover 304 and clean it, or replace the mud pumped into the mud squeezing end 303 with cleaning liquid to clean the mud inside. However, in actual use, there is still a large amount of mud that has not been cleaned up, so the cleaning cover 304 will be disassembled and cleaned up. However, in actual situations, the cleaning cover 304 is rarely disassembled and cleaned up. The chemical mud used for drilling will be adjusted accordingly according to the soil conditions in each region. If there is residual mud in the mud input cabin 3, the initial chemical mud pumped out by the mud pump 1 will deviate from the chemical mud composition suitable for the local area. Secondly, the dried chemical mud or ordinary mud will damage the inside of the mud pump 1. The present invention performs the first cleaning by pumping the cleaning liquid into the mud squeezing end 303. After the cleaning is completed, the mud input cabin 3 at the bottom will be cleaned. At this time, it is necessary to fill the sealed cleaning pipe 302 with cleaning liquid. After the cleaning liquid is poured into the first cleaning partition block 3091 and the second cleaning partition block 3092, the fixing bolt 308 is unscrewed, the sealing cover 307 is opened, and the air-permeable drainage pipe 3010 is opened, and the cleaning rod 309 is pulled back and forth, so that the cleaning liquid vibrates the mud input into the interior of the cabin 3 under the back and forth pulling, so that the mud is mixed into the cleaning liquid. At this time, the cleaning rod 309 is pulled out, so that the mud mixed between the first cleaning partition block 3091 and the second cleaning partition block 3092 is The cleaning liquid is brought out, and at this time, the sealing cleaning tube 302 at the cleaning cover 304 is filled with cleaning liquid, and then the cleaning rod 309 is pushed in for secondary cleaning. The first cleaning partition block 3091 pushes the cleaning liquid in the mud input cabin 3 to the cleaning cover 304 so that it is discharged through the breathable drainage pipe 3010 until the first cleaning partition block 3091 is returned to its position. At this time, the sealing cover 307 is closed and fixed with the fixing bolt 308. At this time, the breathable drainage pipe 3010 and the sealing cleaning tube 302 are closed to complete the cleaning operation.

[0040] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A well wall grouting water control tool for penetrating a frozen pipe, comprising a mud pump (1) and a pump out chamber (2), characterized in that: The bottom end of the pump out cabin (2) is fixedly connected to a mud input cabin (3), the top end of the mud input cabin (3) is provided with a mud pump inlet (301) corresponding to the pump out cabin (2), the end of the mud input cabin (3) located away from the mud pump (1) is fixedly welded with a mud squeezing end (303), both sides of the top end of the mud input cabin (3) are welded with sealed cleaning pipes (302), one end of the mud input cabin (3) is fixedly connected to a cleaning cover (304), and the other end of the mud input cabin (3) is fixedly connected to a A fixed cover (305), wherein the fixed cover (305) is located at one end away from the mud pump (1) and is fixedly connected to a rotating support block (306), wherein the rotating support block (306) is connected to a sealing cover (307) via a hinge, wherein the sealing cover (307) can rotate around the rotating support block (306), and wherein the other end of the fixed cover (305) located at the rotating support block (306) is provided with a fixing bolt (308), wherein the sealing cover (307) and the fixed cover (305) are fixedly connected via the fixing bolt (308).

2. The well wall grouting water control tool for passing through the frozen pipe according to claim 1 is characterized in that: A breathable drainage pipe (3010) is fixedly welded to the bottom side of one end of the cleaning cover (304) which is located away from the sealing cover (307). The breathable drainage pipe (3010) is communicated with the inner wall of the mud input cabin (3). The inner wall of the mud input cabin (3) is provided with a cleaning rod (309). The cleaning rod (309) is located at one end of the cleaning cover (304) and is fixedly connected to a first cleaning partition block (3091). A second cleaning partition block (3092) is fixedly sleeved on the middle part of the cleaning rod (309) and located on one side of the outer wall of the sealing cover (307). The breathable drainage pipe (3010) and the sealing cleaning pipe (302) are both fixedly connected to covers for sealing.

3. The well wall grouting water control tool for passing through the frozen pipe according to claim 2 is characterized in that: The outer walls of the first cleaning partition block (3091) and the second cleaning partition block (3092) are both sleeved with rubber gaskets. The first cleaning partition block (3091) and the second cleaning partition block (3092) are both located on the inner wall of the mud input cabin (3) and are movably sleeved with the mud input cabin (3).

4. The well wall grouting water control tool for passing through the frozen pipe according to claim 3 is characterized in that: When the first cleaning partition block (3091) is located in the mud input cabin (3), it is located between the sealed cleaning tube (302) at the top of the cleaning cover (304) and the cleaning cover (304), and when the second cleaning partition block (3092) is located in the mud input cabin (3), it is located between the sealed cleaning tube (302) at the top of the sealing cover (307) and the sealing cover (307).

5. A method for grouting water treatment through a frozen pipe, implemented in a tool for grouting water treatment through a frozen pipe as claimed in claim 1, comprising the following contents: S1. Preparation for drilling: First, select a suitable location for the drilling rig near the wellhead, determine the coordinates of the hole and the grouting treatment section points, and design the drilling trajectory in combination with the actual position map of the freezing pipe to determine the actual drilling position; S2. Combined drilling tools: After the inclined well drilling rig is assembled and the ordinary screw drilling tools are installed, drilling is carried out. When drilling, the screw drill uses the drilling fluid as the power to convert the hydraulic pressure into mechanical energy for drilling. When drilling, after drilling 30-40 meters, a high-precision inclinometer is used to measure the trajectory of the drilling. If the measured trajectory is the same as the designed trajectory, drilling will continue. If there is a deviation in the trajectory, it needs to be corrected. After the correction is completed, drilling will continue; S3. Replacement of drilling tools: After drilling to the designated position according to the drilling design trajectory, it is necessary to perform oblique drilling. In this case, the drilling tools need to be replaced. By combining the rotary drill with the directional drilling tool to make an oblique drill, a mud pump needs to be used to pump chemical mud into the borehole during drilling. The prepared chemical mud is used as the drilling fluid, so that the borehole is drilled according to the designed trajectory through the gap of the freezing pipe and into the designed grouting area outside the well wall; S4. At this time, grouting operation is carried out. In order to improve the grouting effect, the drilling speed is controlled to maintain an appropriate grouting pressure during grouting. Under the action of grouting pressure, the slurry is injected from the ground through the grouting holes to seal the water channels outside the well wall. The grouting pressure is controlled during grouting to ensure that the slurry completely fills the well wall without damaging it. At the same time, all the grouting holes successfully pass through the gaps in the freezing pipes to reach the designed positions outside the well wall.

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