Pressure seal hole stopper for geological drilling holes

Abstract

The application discloses a pressure sealing hole water stopper for a geological drilling hole and relates to the field of geological drilling hole water stoppers.The pressure sealing hole water stopper comprises a fixed pipe, a drill rod column variable-diameter joint is arranged at the upper end of the fixed pipe, a fixed plate is fixedly connected in the fixed pipe, a plurality of first through holes are arranged through the fixed plate, a rotating plate is rotatably arranged in the fixed pipe, the rotating plate is in contact with the fixed plate, the same number of second through holes as the first through holes are arranged on the rotating plate, and a driving mechanism is arranged in the fixed pipe.When water injection is not performed, the driving mechanism drives the rotating plate to rotate, the second through holes on the rotating plate are staggered with the first through holes on the fixed plate, when the water flow return height phenomenon occurs, the water flow cannot enter above the rotating plate, and the effective control of the water flow return height is achieved;when water injection is performed, the driving mechanism drives the rotating plate to rotate, the second through holes are connected with the first through holes, and thus the water injection is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of geological drilling hole water stopper, in particular to the pressure closed hole water stopper for geological drilling hole. BACKGROUND

[0002] Drilling is an important technical means in geological exploration work, and a drill rig is used to drill downward from the ground surface to form a cylindrical drilling hole in the stratum to identify and divide the stratum, and rock cores, ore samples, and soil samples can be obtained from different depths of the drilling hole for analysis and research to determine the physical and mechanical properties and indexes of rock and soil layers to provide design needs. If the water flow return height during cementing operation cannot be effectively controlled during geological drilling, the construction engineering quality cannot be guaranteed, which may cause quality problems for subsequent operations, and sometimes natural gas leakage accidents occur, causing personnel casualties.

[0003] The existing Chinese patent with the authorization announcement number CN213953556U discloses a pressure closed hole water stopper for geological drilling hole, which relates to the technical field of geological drilling hole water stopper. The utility model discloses a U-shaped frame, a baffle and a connecting rod. The baffle blocks the communication between the inner cavity of the drill rod column reducing joint and the inner cavity of the inner tube, so that the water flow cannot return high. The elastic rubber sleeve expands and tightly fits the inner wall of the outer tube, so that the water flow cannot return high through the inner cavity of the outer tube, thereby effectively controlling the water flow return height during cementing operation.

[0004] The present application provides a technical solution different from the above-mentioned cited document to solve the above-mentioned technical problems. SUMMARY

[0005] The present application provides a pressure closed hole water stopper for geological drilling hole to solve the above-mentioned technical problems.

[0006] To solve the above-mentioned technical problems, the following technical solutions are adopted:

[0007] The pressure closed hole water stopper for geological drilling hole comprises a fixed tube, a drill rod column reducing joint is installed at the upper end of the fixed tube, a fixed plate is fixedly connected in the fixed tube, a plurality of first through holes are provided through the fixed plate, a rotating plate is rotatably installed in the fixed tube, the rotating plate is in contact with the fixed plate, the same number of second through holes as the first through holes are installed on the rotating plate, a driving mechanism for driving the rotating plate to rotate is installed in the fixed tube, the first through holes are connected or staggered with the second through holes by driving the rotating plate to rotate through the driving mechanism.

[0008] Preferably, the driving mechanism comprises a movable plate and a connecting column, the connecting column is fixedly connected with the center part of the top surface of the rotating plate, the movable plate is slidably connected with the inner wall of the fixed tube, a plurality of water passing holes are arranged through the movable plate, a fixed cylinder is installed on the bottom surface of the movable plate, the fixed cylinder is sleeved on the connecting column and slidably connected with the connecting column, when the movable plate drives the fixed cylinder to move, the fixed cylinder drives the rotating plate to rotate through the connecting column.

[0009] Preferably, a plurality of inclined grooves are arranged on the connecting column, a plurality of fixed blocks which are same in number with the inclined grooves are fixedly connected with the inner wall of the fixed cylinder, and the plurality of fixed blocks are respectively located in the plurality of inclined grooves and slidably connected with the plurality of inclined grooves.

[0010] Preferably, a fixed ring is fixedly connected with the inner wall of the fixed tube below the movable plate, a plurality of slide rods are arranged through the fixed ring, the slide rods are slidably connected with the fixed ring, the upper ends of the slide rods are fixedly connected with the movable plate, and the first springs are sleeved on the portions of the slide rods above the fixed ring.

[0011] Preferably, the lower ends of the slide rods are fixedly connected with the limiting plates.

[0012] Preferably, the number of the first through holes is four, and the centers of the four first through holes and the centers of the four second through holes are located on the same virtual circle.

[0013] Preferably, an inner ring groove is arranged on the inner wall of the fixed tube, a plurality of storage grooves are arranged on the drill rod column reducing joint, an expansion rod is installed in the storage groove, a limiting block is fixedly connected with the extension end of the expansion rod, the limiting block extends out of the storage groove and is inserted into the inner ring groove, and a second spring is sleeved on the expansion rod.

[0014] Preferably, an outer ring groove is arranged on the outer surface of the fixed tube, a plurality of jacks which are same in number with the limiting blocks are slidably connected between the outer ring groove and the inner ring groove, the jacks are slidably connected with the fixed tube, and one end of the jack is in contact with the limiting block.

[0015] Preferably, a rubber ring is installed in the outer ring groove, and one end of each of the plurality of jacks is fixedly connected with the rubber ring.

[0016] Preferably, the bottom surface of the limiting block is a slope.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The fixing plate, rotating plate, first through hole, second through hole and driving mechanism are arranged, when not water injection, the driving mechanism drives the rotating plate to rotate, the second through hole on the rotating plate is staggered with the first through hole on the fixing plate, when the water flow back high phenomenon occurs, the water flow cannot enter above the rotating plate, the purpose of effectively controlling the water flow back high is achieved; when water injection, the driving mechanism drives the rotating plate to rotate, the second through hole is communicated with the first through hole, thereby facilitating water injection.

[0019] 2. The inner ring groove, outer ring groove, rubber ring, ejector rod, storage groove, telescopic rod, second spring and limit block are arranged, the drill rod string reducing joint is conveniently and quickly installed on the fixed pipe, and the drill rod string reducing joint is conveniently and quickly disassembled from the fixed pipe, so that the drill rod string reducing joint is conveniently and quickly replaced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the three-dimensional structure of the present application Figure 1 ;

[0021] Figure 2 is the three-dimensional structure of the present application Figure 2

[0022] Figure 3 is the structural schematic view of the present application

[0023] Figure 4 is the enlarged schematic view of A part of the present application Figure 3 ;

[0024] Figure 5 is the three-dimensional structure of the driving mechanism, fixing plate and movable plate of the present application Figure 1 ;

[0025] Figure 6 is the three-dimensional structure of the driving mechanism, fixing plate and movable plate of the present application Figure 2 ;

[0026] Figure 7 is the structural schematic view of the connecting column and rotating plate of the present application

[0027] Figure 8 is the structural schematic view of the movable plate and fixed cylinder of the present application

[0028] Sign: 1, fixed tube; 11, inner ring groove; 12, outer ring groove; 13, rubber ring; 14, ejector pin; 2, drill rod column reducing joint; 21, storage groove; 22, telescopic rod; 23, second spring; 24, limit block; 3, fixed plate; 31, first through hole; 4, rotating plate; 41, second through hole; 5, driving mechanism; 51, connecting column; 511, inclined groove; 52, movable plate; 521, water passing hole; 53, fixed cylinder; 531, fixed block; 54, fixed ring; 55, sliding rod; 551, first spring; 552, limit plate. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the following will further describe the present application in combination with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present application, and are not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0030] The specific embodiments of the present application will be described below in combination with the drawings.

[0031] Embodiment 1

[0032] As Figures 1-3 , Figures 5-8As shown, the geological drilling hole pressure sealing hole stopper comprises a fixed pipe 1, a drill string variable diameter joint 2 is installed at the upper end of the fixed pipe 1, a fixed plate 3 and a fixed ring 54 are fixedly connected in the fixed pipe 1, four first through holes 31 are provided through the fixed plate 3, a rotating plate 4 is arranged between the fixed plate 3 and the fixed ring 54, the rotating plate 4 is rotatably connected with the fixed pipe 1, the bottom surface of the rotating plate 4 is in contact with the top surface of the fixed plate 3, four second through holes 41 are provided through the rotating plate 4, the centers of the four first through holes 31 and the centers of the four second through holes 41 are located on the same virtual circle, a plurality of slide rods 55 are provided through the fixed ring 54, the plurality of slide rods 55 are slidably connected with the fixed ring 54, a movable plate 52 is fixedly connected to the top surface of the plurality of slide rods 55, the movable plate 52 is slidably connected with the fixed pipe 1, a plurality of water passing holes 521 are provided through the movable plate 52, a limiting plate 552 is fixedly connected to the lower end of the plurality of slide rods 55, a first spring 551 is sleeved on the slide rod 55, and the two ends of the first spring 551 are fixedly connected with the movable plate 52 and the fixed ring 54 respectively; a fixed cylinder 53 is fixedly connected to the center position of the bottom surface of the movable plate 52, a plurality of fixed blocks 531 are installed on the inner wall of the fixed cylinder 53, a connecting column 51 is slidably inserted into the fixed cylinder 53, the lower end of the connecting column 51 is fixedly connected with the center part of the rotating plate 4, a plurality of inclined grooves 511 are formed on the connecting column 51, the number of the inclined grooves 511 is the same as that of the fixed blocks 531, the plurality of fixed blocks 531 are respectively located in the plurality of inclined grooves 511 and are slidably connected with the inclined grooves 511, when the movable plate 52 moves, the fixed cylinder 53 moves, then the fixed blocks 531 move along the inclined grooves 511, the connecting column 51 rotates, then the rotating plate 4 rotates, and the second through holes 41 on the rotating plate 4 are communicated with or staggered with the first through holes 31 on the fixed plate 3.

[0033] Working principle: after the drill string is connected with the drill string variable diameter joint 2, the drill string is lowered to the predetermined position of the cement return height required by the construction, when water is supplied downward, the water flows into the fixed pipe 1 through the inner cavity of the drill string variable diameter joint 2, part of the water flows downward through the water passing holes 521, the other part of the water pushes the movable plate 52 to move downward, the movable plate 52 moving downward drives the fixed cylinder 53 to move, then the plurality of fixed blocks 531 move downward along the plurality of inclined grooves 511, since the inclined grooves 511 are inclined, when the fixed blocks 531 move downward, the connecting column 51 rotates through the inclined grooves 511, then the rotating plate 4 rotates, and the second through holes 41 on the rotating plate 4 are communicated with the first through holes 31 on the fixed plate 3, so that the water can flow to the lower part of the fixed plate 3 through the first through holes 31 and the second through holes 41, thereby facilitating water injection.

[0034] When water injection stops, the first spring 551 will push the movable plate 52 upward under the influence of the rebound force of the stretched first spring 551. The upward moving movable plate 52 will drive the fixed cylinder 53 to move upward, thereby causing the multiple fixed blocks 531 to move upward along the multiple inclined grooves 511, thereby causing the connecting column 51 to rotate, thereby driving the rotating plate 4 to rotate, so that the second through hole 41 on the rotating plate 4 is staggered with the first through hole 31 on the fixed plate 3, so that the space above the rotating plate 4 is not connected with the space below the fixed plate 3. When the water flow returns, the water flow cannot enter the top of the rotating plate 4, thereby achieving the purpose of effectively controlling the water flow return.

[0035] Example 2

[0036] like Figures 1-4 As shown, in the case where other parts are the same as those of Example 1, the difference between this embodiment and Example 1 is that: an inner ring groove 11 is provided on the inner wall of the fixed tube 1, an outer ring groove 12 is provided on the outer surface of the fixed tube 1, a rubber ring 13 is installed in the outer ring groove 12, a plurality of push rods 14 are fixedly connected to the inner ring of the rubber ring 13, the other end of the push rod 14 extends into the inner ring groove 11, and the push rod 14 is slidably connected to the fixed tube 1; a plurality of storage grooves 21 are provided on the drill column reducer 2, and the number of the storage grooves 21 is the same as that of the push rod 14. The rods 14 are the same, and multiple push rods 14 are arranged in a one-to-one correspondence with multiple storage slots 21. A telescopic rod 22 is installed in the storage slot 21. The extending end of the telescopic rod 22 is fixedly connected to a limit block 24. A second spring 23 is sleeved on the telescopic rod 22. The two ends of the second spring 23 are respectively fixedly connected to the limit block 24 and the groove wall of the storage slot 21. The limit block 24 extends to the outside of the storage slot 21 and is plugged into the inner ring groove 11. The side of the limit block 24 away from the telescopic rod 22 contacts the push rod 14, and the bottom surface of the limit block 24 is a slope.

[0037] Working principle: When the drill column reducer 2 needs to be connected to the fixed tube 1, the drill column reducer 2 is inserted into the fixed tube 1. During the insertion, the inner wall of the fixed tube 1 pushes the limit block 24 to move, thereby moving the limit block 24 into the storage groove 21 and compressing the telescopic rod 22 and the second spring 23. As the drill column reducer 2 continues to be inserted, the limit block 24 encounters the inner ring groove 11. Under the influence of the rebound force of the compressed second spring 23, the second spring 23 pushes the limit block 24 to move, thereby inserting the limit block 24 into the inner ring groove 11, so that the drill column reducer 2 cannot be separated from the fixed tube 1 by itself, thereby completing the connection between the drill column reducer 2 and the fixed tube 1.

[0038] When it is needed to separate the drill rod string reducing joint 2 from the fixed pipe 1, the rubber ring 13 is held and squeezed, the rubber ring 13 pushes the plurality of jacks 14 to move, the jacks 14 push the limiting block 24 out of the inner ring groove 11, then the drill rod string reducing joint 2 is moved away from the fixed pipe 1, so that the drill rod string reducing joint 2 is separated from the fixed pipe 1;

[0039] By setting the inner ring groove 11, the outer ring groove 12, the rubber ring 13, the jack 14, the storage groove 21, the telescopic rod 22, the second spring 23 and the limiting block 24, the drill rod string reducing joint 2 is quickly installed on the fixed pipe 1, and the drill rod string reducing joint 2 is quickly disassembled from the fixed pipe 1, so that the drill rod string reducing joint 2 is replaced.

[0040] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, the above embodiments and descriptions in the specification are only preferred examples of the present application, and are not used to limit the present application, various changes and improvements of the present application can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A pressure-locked hole stopper for geological drilling holes, comprising a stationary pipe (1), the upper end of which is fitted with a drill string reducer (2), characterised in that: The fixed pipe (1) is fixedly connected with a fixed plate (3), a plurality of first through holes (31) are arranged on the fixed plate (3), the fixed pipe (1) is rotatably installed with a rotating plate (4), the rotating plate (4) is in contact with the fixed plate (3), the rotating plate (4) is installed with a plurality of second through holes (41) which are same in number with the first through holes (31), the fixed pipe (1) is installed with a driving mechanism (5) for driving the rotating plate (4) to rotate, the rotating plate (4) is driven to rotate by the driving mechanism (5), so that the first through holes (31) are communicated or staggered with the second through holes (41). The driving mechanism (5) comprises a movable plate (52) and a connecting column (51), the connecting column (51) is fixedly connected with the top surface center part of the rotating plate (4), the movable plate (52) is slidably connected with the inner wall of the fixed pipe (1), a plurality of water passing holes (521) are arranged on the movable plate (52), a fixed cylinder (53) is installed on the bottom surface of the movable plate (52), the fixed cylinder (53) is sleeved on the connecting column (51) and is slidably connected with the connecting column (51), when the movable plate (52) drives the fixed cylinder (53) to move, the fixed cylinder (53) drives the rotating plate (4) to rotate through the connecting column (51). A plurality of inclined grooves (511) are arranged on the connecting column (51), a plurality of fixed blocks (531) which are same in number with the inclined grooves (511) are fixedly connected with the inner wall of the fixed cylinder (53), and the plurality of fixed blocks (531) are respectively located in the plurality of inclined grooves (511) and are slidably connected with the inclined grooves (511). A fixed ring (54) is fixedly connected with the inner wall of the fixed pipe (1) below the movable plate (52), a plurality of slide rods (55) are arranged on the fixed ring (54), the slide rods (55) are slidably connected with the fixed ring (54), the upper ends of the slide rods (55) are fixedly connected with the movable plate (52), and the first springs (551) are sleeved on the portions of the slide rods (55) above the fixed ring (54). The lower ends of the slide rods (55) are fixedly connected with limiting plates (552).

2. A pressure-locked bore seal for use in a geological drilling borehole according to claim 1, characterised in that: The number of the first through holes (31) is four, and the centers of the four first through holes (31) and the centers of the four second through holes (41) are located on the same virtual circle.

3. A pressure-locked bore seal for use in a geological drilling borehole according to claim 1, characterised in that: An inner ring groove (11) is arranged on the inner wall of the fixed pipe (1), a plurality of storage grooves (21) are arranged on the drill rod variable diameter joint (2), an expansion rod (22) is installed in the storage groove (21), a limiting block (24) is fixedly connected with the extension end of the expansion rod (22), the limiting block (24) extends out of the storage groove (21) and is inserted into the inner ring groove (11), and the second spring (23) is sleeved on the expansion rod (22).

4. A pressure-locked bore seal for use in a geological drilling borehole according to claim 3, characterised in that: An outer ring groove (12) is arranged on the outer surface of the fixed pipe (1), a plurality of jacks (14) which are same in number with the limiting blocks (24) are slidably connected between the outer ring groove (12) and the inner ring groove (11), the jacks (14) are slidably connected with the fixed pipe (1), and one end of the jack (14) is in contact with the limiting block (24).

5. A pressure-locked bore seal for use in a geological drilling borehole according to claim 4, characterised in that: A rubber ring (13) is installed in the outer ring groove (12), and one end of each of the plurality of top rods (14) is fixedly connected with the rubber ring (13).

6. A pressure-locked bore seal for use in a geological drilling borehole according to claim 5, characterised in that: The bottom surface of the limiting block (24) is a slope.

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