CN215485949U

CN215485949U - Cement potting expansion type water stopper for geological drilling well

Info

Publication number: CN215485949U
Application number: CN202121815238.1U
Authority: CN
Inventors: 袁华东; 刘洲辉; 李俊; 汪海兵
Original assignee: Sixth Geological Team Of Hubei Geological Bureau
Current assignee: Sixth Geological Team Of Hubei Geological Bureau
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-11
Anticipated expiration: 2031-08-05

Abstract

The utility model discloses a cement encapsulating expansion type water stopper for geological drilling well, which comprises a sleeve, wherein a water swelling rubber layer is bonded and coated on the outer side of the sleeve, an inner pipe is arranged in the sleeve, a plurality of first through holes inclining downwards are formed in the side wall of the inner pipe, the bottom of the inner pipe is fixedly connected with a conical plug, the bottom of the inner side of the sleeve is of a conical structure, the conical plug is matched with the conical structure, elastic displacement mechanisms are fixedly arranged on two sides of the inner pipe, and first grooves with openings at the tops are formed in the inner walls of the two sides of the sleeve. The utility model has reasonable design, can effectively realize the plugging of the sleeve through the conical plug, improves the plugging and sealing effect, is convenient to quickly realize the transverse fixation of the sleeve while plugging the sleeve, improves the fixation stability of the sleeve, reduces the loosening risk in the use process, can take out the inner pipe from the sleeve, and is convenient for the next use.

Description

Cement potting expansion type water stopper for geological drilling well

Technical Field

The utility model relates to the technical field of cement filling and sealing expansion type water stoppers, in particular to a cement filling and sealing expansion type water stopper for a geological drilling well.

Background

In hydrogeological drilling, the key requirement of layered water sampling in a drill hole is reliable water stopping effect, so that special water stopper equipment of various types is required to be used for sealing an annular space between a drilling well and a pipe column, the current common water stopping modes comprise methods such as an external sealing isolation method, an expansion type plugging method, cement filling and sealing and the like, wherein the cement filling and sealing method is widely used, when the cement filling and sealing method is used, a sleeve is arranged in the well hole, the sleeve is tightly pressed and fixed by using the pressure of a well wall, cement is filled into the well hole through the sleeve, the purpose of cement filling and sealing is realized, and meanwhile, a water swelling rubber layer is matched to realize the tight fit between the sleeve and the well wall;

the current mode that adopts the cement embedment, it has the shortcoming that is not convenient for stabilize fixedly to the sleeve pipe, because the difference of different geology soil environment leads to soil soft, it is poor only to rely on wall of a well pressure to realize fixed mode stabilizing effect, the not hard up phenomenon appears easily at the in-process that uses of sleeve pipe, thereby the influence is to the sealed stagnant water effect of well, and after the cement jar seals, be not convenient for carry out effective shutoff to the sleeve pipe, the current mode of cement realization to the sleeve pipe shutoff is remained in the utilization, the shutoff effect is poor, can not satisfy the user demand, synthesize above-mentioned condition and improve, therefore we have proposed a geological drilling well cement embedment inflation formula stagnant water ware and be used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a cement-filled and sealed expansion type water stopper for a geological drilling well.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the cement filling and sealing expansion type water stopper for the geological drilling well comprises a sleeve, wherein a water swelling rubber layer is bonded and coated on the outer side of the sleeve, an inner pipe is arranged in the sleeve, a plurality of first through holes inclining downwards are formed in the side wall of the inner pipe, a conical plug is fixedly connected to the bottom of the inner pipe, a conical structure is arranged at the bottom of the inner side of the sleeve, the conical plug is matched with the conical structure, elastic displacement mechanisms are fixedly mounted on two sides of the inner pipe respectively, first grooves with the tops being arranged as openings are formed in the inner walls of the two sides of the sleeve respectively, one side, away from the inner pipe, of each elastic displacement mechanism extends into the corresponding first groove, a T-shaped plug cover is sleeved in the sleeve, the tops of the T-shaped plugs extend to the upper part of the sleeve, first jacks are formed in the inner walls of the two sides of the sleeve respectively, second jacks are formed in the inner walls of the two sides of the water swelling rubber layer respectively, and are communicated with the corresponding second jacks, be equipped with the cement siphunculus in the inner tube, establish to bowl cover shape structure on the top of cement siphunculus, the lateral wall fixed connection of cement siphunculus outside top and inner tube, the equal fixed mounting in both sides bottom of cement siphunculus has elasticity cartridge mechanism, one side that two elasticity cartridge mechanisms kept away from each other extends to the outside of inner tube respectively, elasticity cartridge mechanism and the first jack and the second jack looks adaptation that correspond, it installs T shape pivot to rotate between the front side inner wall of cement siphunculus and the rear side inner wall, the top of T shape pivot extends to the top of inner tube, fixed mounting has stay cord actuating mechanism in the elasticity cartridge mechanism, the outside fixed connection of stay cord actuating mechanism and T shape pivot, fixed cover is equipped with the toper guide housing in the T shape pivot, the toper guide housing is located stay cord actuating mechanism's top, the toper guide housing cooperatees with stay cord actuating mechanism.

Preferably, the elastic displacement mechanism comprises a moving block, one side of the moving block, which is close to the inner tube, is fixedly connected with the inner tube, a T-shaped positioning rod is movably contacted with the inner wall of the bottom of the first groove, the moving block is slidably sleeved on the corresponding T-shaped positioning rod, an anti-drop block is fixedly connected to the top end of the T-shaped positioning rod, a first spring is fixedly connected between the bottom of the moving block and the inner wall of the bottom of the T-shaped positioning rod, and the first spring is movably sleeved on the corresponding T-shaped positioning rod.

Preferably, elasticity cartridge mechanism includes the rectangle pole, and the one end that two rectangle poles are close to each other respectively with the both sides bottom fixed connection of cement siphunculus, and sliding sleeve is equipped with the intubate on the rectangle pole, and the one end that the cement siphunculus was kept away from to the intubate is established to toper block structure, and the one end inner wall that the cement siphunculus was kept away from to the intubate and the rectangle pole that corresponds is kept away from between the one end of cement siphunculus fixedly connected with be in compression state's compression spring, and the intubate cooperatees with corresponding first jack and second jack, and the one end that the cement siphunculus was kept away from to the intubate and sheathed tube inner wall swing joint.

Preferably, the pull rope driving mechanism comprises flexible steel ropes, one ends of the two flexible steel ropes, which are far away from each other, are fixedly connected with one ends of the two insertion pipes, which are close to each other, respectively, the flexible steel ropes are wound and fixed on the outer side of the T-shaped rotating shaft, and the conical guide cover is positioned above the flexible steel ropes.

Preferably, the front side and the rear side of the moving block are respectively in movable contact with the front side inner wall and the rear side inner wall of the corresponding first groove.

Preferably, a fixing rod is fixedly installed between the inner wall of the front side and the inner wall of the rear side of the cement through pipe, a circular hole is formed in the top of the fixing rod, a bearing is sleeved in the circular hole, and the inner side of the inner ring of the bearing is fixedly connected with the outer side of the T-shaped rotating shaft.

Preferably, the spacing groove has been seted up at the top of rectangle pole, and fixed mounting has the stopper on the top inner wall of intubate, stopper and the spacing groove sliding connection who corresponds, and the recess that front side and rear side set up for the opening is all seted up to the one end that two rectangle poles kept away from each other, and the one end that two compression springs are close to each other is respectively with one side inner wall fixed connection that two recesses are close to each other.

Preferably, the inner walls of the two sides of the cement through pipe are provided with first through holes, and the flexible steel rope is located in the corresponding first through holes and is not in contact with the inner walls of the first through holes.

Preferably, the outer side of the T-shaped plug cover is provided with an external thread, the inner side of the sleeve is provided with an internal thread, and the internal thread is meshed with the external thread.

Compared with the prior art, the utility model has the beneficial effects that:

the cement can be canned through the cement through pipe, the cement enters the inner pipe and flows into the borehole through the plurality of first through holes and the sleeves in sequence, after the cement is encapsulated, the T-shaped plug cover is rotated in the forward direction, the T-shaped plug cover rotates in the forward direction and moves downwards while moving downwards to the inner part of the sleeve to be contacted with the top of the T-shaped rotating shaft, the T-shaped plug cover continues to move downwards and extrudes the T-shaped rotating shaft to move downwards, and the T-shaped rotating shaft sequentially passes through the bearing, the T-shaped positioning rod, the first spring, the inner pipe, the first through hole, the second through hole, the moving block, the T-shaped positioning rod, the first spring, the T-shaped plug cover, the cement through pipe, the first insertion hole, the T-shaped plug cover, the inserting pipe into the borehole, the water-swelling rubber layer and the insertion pipe The fixed rod and the cement through pipe drive the inner pipe to move downwards, the inner pipe drives the two moving blocks to respectively slide on the corresponding T-shaped positioning rods and compress the first spring, the inner pipe drives the conical plug to downwards plug the bottom end of the sleeve pipe, the inner pipe drives the two insertion pipes to downwards move to be aligned with the corresponding first insertion holes and second insertion holes while moving downwards, and the elastic force of the compression spring in a compression state drives the corresponding insertion pipes to sequentially penetrate through the corresponding first insertion holes and second insertion holes to be inserted into soil, so that the sleeve pipe is fixed;

when the inner tube needs to be moved out, the reverse rotary T-shaped plug cover is moved out from the sleeve, at the moment, the T-shaped rotating shaft can be rotated in the forward direction to wind the two flexible steel ropes, the two insertion tubes are pulled by the two flexible steel ropes to move towards the mutually close direction and compress the compression spring, the insertion tubes sequentially move out of soil, the second insertion holes and the first insertion holes, at the moment, the T-shaped rotating shaft can be pulled upwards slightly to sequentially pass through the fixing rod, the bearing and the cement through tube drive the inner tube to move upwards, at the moment, the elastic force of the first spring in the compression state drives the inner tube to continue to move upwards to reset through the corresponding moving block, at the moment, the inner tube can be moved out from the sleeve.

The utility model has reasonable design, can effectively realize the plugging of the sleeve through the conical plug, improves the plugging and sealing effect, is convenient to quickly realize the transverse fixation of the sleeve while plugging the sleeve, improves the fixation stability of the sleeve, reduces the loosening risk in the use process, can take out the inner pipe from the sleeve, and is convenient for the next use.

Drawings

Fig. 1 is a schematic structural diagram of a cement-filled inflatable water stopper for geological drilling boreholes according to the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the figure: 100 sleeve pipes, 101 water-swelling rubber layers, 102 inner pipes, 1 first through hole, 2 conical plugs, 3 first grooves, 4 second jacks, 5 moving blocks, 6T-shaped positioning rods, 7 first springs, 8T-shaped plugs, 9 cement through pipes, 10 first jacks, 11T-shaped rotating shafts, 12 insertion pipes, 13 rectangular rods, 14 compression springs, 15 conical guide sleeves and 16 flexible steel ropes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a cement potting expansion type water stopper for geological drilling boreholes comprises a casing 100, the outer side of the casing 100 is bonded and coated with a water-swelling rubber layer 101, an inner tube 102 is arranged in the casing 100, a plurality of first through holes 1 inclining downwards are formed in the side wall of the inner tube 102, a tapered plug 2 is fixedly connected to the bottom of the inner tube 102, the bottom of the inner side of the casing 100 is of a tapered structure, the tapered plug 2 is matched with the tapered structure, elastic displacement mechanisms are fixedly mounted on both sides of the inner tube 102, first grooves 3 with openings at the tops are formed in the inner walls of both sides of the casing 100, one side of each elastic displacement mechanism, which is far away from the inner tube 102, extends into the corresponding first groove 3, a T-shaped plug 8 is sleeved in the casing 100, the top of the T-shaped plug 8 extends to the upper side of the casing 100, first insertion holes 10 are formed in the inner walls of both sides of the casing 100, second insertion holes 4 are formed in the inner walls of both sides of the water-swelling rubber layer 101, the first jack 10 is communicated with the corresponding second jack 4, a cement through pipe 9 is arranged in the inner pipe 102, the top end of the cement through pipe 9 is of a bowl-shaped structure, the top of the outer side of the cement through pipe 9 is fixedly connected with the side wall of the inner pipe 102, the bottoms of the two sides of the cement through pipe 9 are fixedly provided with elastic inserting mechanisms, the sides, far away from each other, of the two elastic inserting mechanisms respectively extend to the outer side of the inner pipe 102, the elastic inserting mechanisms are matched with the corresponding first jack 10 and the corresponding second jack 4, a T-shaped rotating shaft 11 is rotatably arranged between the inner wall of the front side and the inner wall of the rear side of the cement through pipe 9, the top of the T-shaped rotating shaft 11 extends to the upper part of the inner pipe 102, a pull rope driving mechanism is fixedly arranged on the elastic inserting mechanisms, the pull rope driving mechanism is fixedly connected with the outer side of the T-shaped rotating shaft 11, a conical guide cover 15 is fixedly arranged on the T-shaped rotating shaft 11, and the conical guide cover 15 is positioned above the pull rope driving mechanism, the conical guide cover 15 is matched with the pull rope driving mechanism;

the elastic displacement mechanism comprises a moving block 5, one side, close to the inner tube 102, of the moving block 5 is fixedly connected with the inner tube 102, a T-shaped positioning rod 6 is movably contacted with the inner wall of the bottom of the first groove 3, the moving block 5 is slidably sleeved on the corresponding T-shaped positioning rod 6, the top end of the T-shaped positioning rod 6 is fixedly connected with an anti-falling block, a first spring 7 is fixedly connected between the bottom of the moving block 5 and the inner wall of the bottom of the T-shaped positioning rod 6, and the first spring 7 is movably sleeved on the corresponding T-shaped positioning rod 6;

the elastic inserting mechanism comprises rectangular rods 13, one ends of the two rectangular rods 13, which are close to each other, are fixedly connected with the bottoms of the two sides of the cement through pipe 9 respectively, inserting pipes 12 are slidably sleeved on the rectangular rods 13, one ends, which are far away from the cement through pipe 9, of the inserting pipes 12 are set to be conical plugging structures, compression springs 14 in a compression state are fixedly connected between the inner walls of one ends, which are far away from the cement through pipe 9, of the inserting pipes 12 and one ends, which are far away from the cement through pipe 9, of the corresponding rectangular rods 13, the inserting pipes 12 are matched with the corresponding first jacks 10 and the corresponding second jacks 4, and one ends, which are far away from the cement through pipe 9, of the inserting pipes 12 are in movable contact with the inner walls of the sleeve 100;

the pull rope driving mechanism comprises flexible steel ropes 16, one ends, far away from each other, of the two flexible steel ropes 16 are fixedly connected with one ends, close to each other, of the two insertion pipes 12 respectively, the flexible steel ropes 16 are wound and fixed on the outer side of the T-shaped rotating shaft 11, and the conical guide cover 15 is located above the flexible steel ropes 16.

In the utility model, the front side and the rear side of a moving block 5 are respectively in movable contact with the front side inner wall and the rear side inner wall of a corresponding first groove 3, a fixed rod is fixedly arranged between the front side inner wall and the rear side inner wall of a cement through pipe 9, a circular hole is arranged at the top of the fixed rod, a bearing is fixedly sleeved in the circular hole, the inner side of an inner ring of the bearing is fixedly connected with the outer side of a T-shaped rotating shaft 11, a limit groove is arranged at the top of a rectangular rod 13, a limit block is fixedly arranged on the top inner wall of an insertion pipe 12 and is in sliding connection with the corresponding limit groove, grooves with openings at the front side and the rear side are arranged at the ends of the two rectangular rods 13 far away from each other, one ends of two compression springs 14 close to each other are respectively and fixedly connected with the inner wall at the side where the two grooves are close to each other, first through holes are arranged on the inner walls at the two sides of the cement through pipe 9, a flexible steel rope 16 is positioned in the corresponding first through holes and is not in contact with the inner walls of the first through holes, the T-shaped plug cover 8 is provided with external threads on the outer side, the sleeve 100 is provided with internal threads on the inner side, and the internal threads are meshed with the external threads.

The working principle is as follows: when the cement filling and sealing device is used, the T-shaped plugging cover 8 rotates reversely, the T-shaped plugging cover 8 moves out of the sleeve 100 while rotating, the sleeve 100 is inserted into a borehole, the water-swelling rubber layer 101 swells in the presence of water, a gap between the sleeve 100 and a stratum is filled, a sealing effect outside the sleeve 100 is achieved, cement can be filled through the cement through pipe 9 at the moment, the cement enters the inner pipe 102 and enters the sleeve 100 through the first through holes 1 on the inner pipe 102, the cement flows into the borehole through the bottom end of the sleeve 100, after the cement filling and sealing are completed, the T-shaped plugging cover 8 is aligned with the sleeve 100, the T-shaped plugging cover 8 rotates forwards, the T-shaped plugging cover 8 moves downwards while rotating and moves downwards into the sleeve 100, the T-shaped plugging cover 8 moves downwards while moving downwards until the bottom of the T-shaped plugging cover contacts with the top of the T-shaped rotating shaft 11, the T-shaped plugging cover 8 continues to move downwards while pressing the T-shaped rotating shaft 11 to sequentially pass through the bearing and the fixing rod to drive the cement through pipe 9 to move downwards, the cement through pipe 9 drives the inner pipe 102 to move downwards, the inner pipe 102 drives the two moving blocks 5 to respectively slide on the corresponding T-shaped positioning rods 6 and compress the first spring 7, the inner pipe 102 drives the conical plug 2 to move downwards, the conical plug 2 moves downwards and simultaneously plugs the bottom end of the sleeve 100, the conical plug 2 can effectively plug the sleeve 100, and the plugging and sealing effects are improved;

the inner tube 102 moves downwards and simultaneously drives the two insertion tubes 12 to move downwards, when the insertion tubes 12 move downwards to be aligned with the corresponding first insertion holes 10 and the corresponding second insertion holes 4, the elastic force of the compression spring 14 in a compression state drives the corresponding insertion tubes 12 to move towards a direction far away from the cement through tube 9, the insertion tubes 12 move and simultaneously pull the corresponding flexible steel ropes 16, the flexible steel ropes 16 pull the T-shaped rotating shafts 11 to rotate reversely and release the flexible steel ropes 16, the insertion tubes 12 sequentially penetrate through the corresponding first insertion holes 10 and the corresponding second insertion holes 4 to be inserted into soil, so that the sleeve 100 is fixed, transverse fixing of the sleeve 100 is realized through a transverse insertion mode, and the fixing stability of the sleeve 100 is improved;

when the inner pipe 102 needs to be moved out, the T-shaped blocking cover 8 is rotated reversely, the T-shaped blocking cover 8 is gradually moved out of the sleeve 100, at this time, the T-shaped rotating shaft 11 can be rotated forwardly, the T-shaped rotating shaft 11 rotates and simultaneously winds the two flexible steel ropes 16, the two flexible steel ropes 16 pull the two insertion pipes 12 to move towards the mutually approaching direction and compress the compression springs 14, the insertion pipes 12 move and simultaneously move out of the soil, the second insertion holes 4 and the first insertion holes 10 in sequence, at this time, the T-shaped rotating shaft 11 can be pulled upwards slightly, the T-shaped rotating shaft 11 drives the cement through pipe 9 to move upwards through the fixing rods and the bearings, the cement through pipe 9 drives the inner pipe 102 to move upwards, at this time, the elastic force of the first spring 7 in a compression state drives the corresponding moving block 5 to move back upwards and reset, the two moving blocks 5 simultaneously drive the inner pipe 102 to continuously move upwards and reset, and the inner pipe 102 removes the blocking of the sleeve 100 while moving upwards, at this time, the inner tube 102 may be continuously pulled upward, and the inner tube 102 sequentially passes through the two moving blocks 5 and the two first springs 7 to drive the two T-shaped positioning rods 6 to move out of the corresponding first grooves 3, so that the inner tube 102 may be moved out of the casing 100.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a geological drilling well cement embedment inflation formula sealing up ware, includes sleeve pipe (100), the outside bonding cladding of sleeve pipe (100) has water-swelling rubber layer (101), is equipped with inner tube (102) in sleeve pipe (100), a characterized in that, seted up a plurality of first through-holes (1) that incline to the downside on the lateral wall of inner tube (102), the bottom fixedly connected with toper end cap (2) of inner tube (102), the inboard bottom of sleeve pipe (100) is established to the toper structure, toper end cap (2) and toper structure looks adaptation, the both sides of inner tube (102) are all fixed mounting has elastic displacement mechanism, all set up first groove (3) that the top set up for the opening on the both sides inner wall of sleeve pipe (100), one side that elastic displacement mechanism kept away from inner tube (102) extends to in corresponding first groove (3), sleeve pipe (100) cover is equipped with T shape blanking cover (8), the top of the T-shaped plug cover (8) extends to the upper part of the sleeve (100), the inner walls of two sides of the sleeve (100) are respectively provided with a first jack (10), the inner walls of two sides of the water-swelling rubber layer (101) are respectively provided with a second jack (4), the first jacks (10) are communicated with the corresponding second jacks (4), the inner pipe (102) is internally provided with a cement through pipe (9), the top end of the cement through pipe (9) is arranged to be a bowl-shaped structure, the top of the outer side of the cement through pipe (9) is fixedly connected with the side wall of the inner pipe (102), the bottoms of two sides of the cement through pipe (9) are respectively and fixedly provided with an elastic inserting mechanism, the mutually far sides of the two elastic inserting mechanisms extend to the outer side of the inner pipe (102) respectively, the elastic inserting mechanisms are matched with the corresponding first jacks (10) and the second jacks (4), a T-shaped rotating shaft (11) is rotatably arranged between the inner wall of the front side and the inner wall of the cement through pipe (9), the top of the T-shaped rotating shaft (11) extends to the upper part of the inner pipe (102), a pull rope driving mechanism is fixedly mounted on the elastic inserting mechanism, the pull rope driving mechanism is fixedly connected with the outer side of the T-shaped rotating shaft (11), a conical guide cover (15) is fixedly sleeved on the T-shaped rotating shaft (11), the conical guide cover (15) is located above the pull rope driving mechanism, and the conical guide cover (15) is matched with the pull rope driving mechanism.

2. The cement-encapsulated expansion type water stopper for the geological drilling well according to claim 1, wherein the elastic displacement mechanism comprises a moving block (5), one side of the moving block (5) close to the inner tube (102) is fixedly connected with the inner tube (102), a T-shaped positioning rod (6) is movably contacted on the inner wall of the bottom of the first groove (3), the moving block (5) is slidably sleeved on the corresponding T-shaped positioning rod (6), an anti-dropping block is fixedly connected to the top end of the T-shaped positioning rod (6), a first spring (7) is fixedly connected between the bottom of the moving block (5) and the inner wall of the bottom of the T-shaped positioning rod (6), and the first spring (7) is movably sleeved on the corresponding T-shaped positioning rod (6).

3. The expansion type water stopper for cement potting of the geological drilling well hole according to claim 1, wherein the elastic insertion mechanism comprises rectangular rods (13), one ends, close to each other, of the two rectangular rods (13) are fixedly connected with the bottoms of the two sides of the cement through pipe (9) respectively, insertion pipes (12) are slidably sleeved on the rectangular rods (13), one ends, far away from the cement through pipe (9), of the insertion pipes (12) are arranged to be conical blocking structures, compression springs (14) in a compression state are fixedly connected between the inner walls of one ends, far away from the cement through pipe (9), of the insertion pipes (12) and the ends, far away from the cement through pipe (9), of the corresponding rectangular rods (13), the insertion pipes (12) are matched with the corresponding first insertion holes (10) and the second insertion holes (4), and one ends, far away from the cement through pipe (9), of the insertion pipes (12) are movably contacted with the inner walls of the casing pipe (100).

4. The expansion type water stopper for cement encapsulation of geological drilling well according to claim 1, characterized in that the pull rope driving mechanism comprises a flexible steel rope (16), one end of the two flexible steel ropes (16) far away from each other is fixedly connected with one end of the two insertion pipes (12) close to each other, the flexible steel rope (16) is wound and fixed on the outer side of the T-shaped rotating shaft (11), and the conical guide cover (15) is positioned above the flexible steel rope (16).

5. The expansion type water stop for cement-sealing of geological drilling wellbores according to claim 2, characterized in that the front and rear sides of the mobile block (5) are in movable contact with the front and rear inner walls of the corresponding first groove (3), respectively.

6. The expansion type water stopper for cement potting of the geological drilling well according to claim 1, wherein a fixing rod is fixedly installed between the front inner wall and the rear inner wall of the cement through pipe (9), a circular hole is formed in the top of the fixing rod, a bearing is fixedly sleeved in the circular hole, and the inner side of an inner ring of the bearing is fixedly connected with the outer side of the T-shaped rotating shaft (11).

7. The expansion type water stopper for cement encapsulation of the geological drilling well according to claim 3, wherein a limiting groove is formed in the top of the rectangular rod (13), a limiting block is fixedly mounted on the inner wall of the top of the insertion pipe (12), the limiting block is connected with the corresponding limiting groove in a sliding mode, grooves with openings at the front side and the rear side are formed in the end, far away from each other, of each rectangular rod (13), and one end, close to each other, of each compression spring (14) is fixedly connected with the inner wall of one side, close to each other, of each groove.

8. The expansion type water stopper for cement potting of the geological drilling well hole according to claim 1, wherein the inner walls of two sides of the cement through pipe (9) are provided with first through holes, and the flexible steel rope (16) is positioned in the corresponding first through hole and is not in contact with the inner wall of the first through hole.

9. The expansion type water stopper for cement sealing of geological drilling well hole according to claim 1, characterized in that the outside of the T-shaped plug (8) is provided with external thread, and the inside of the casing (100) is provided with internal thread, and the internal thread is engaged with the external thread.