CN215369776U

CN215369776U - Wellhead protection device for engineering logging

Info

Publication number: CN215369776U
Application number: CN202121791480.XU
Authority: CN
Inventors: 李明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2021-12-31
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses a wellhead protection device for engineering logging, which comprises a protection plate, wherein a mounting ring is arranged below the protection plate, a sealing rubber gasket is embedded at the bottom of the protection plate, mounting pipes are fixedly mounted on two sides of the protection plate, a thread driving mechanism is rotatably connected on the mounting pipes, one sides, close to each other, of the two thread driving mechanisms are fixedly connected with two sides of the mounting ring respectively, the two thread driving mechanisms are fixedly sleeved with the same linkage mechanism, and an L-shaped positioning rod is fixedly connected to the right side of the mounting pipe on the right side in the two mounting pipes. The utility model has reasonable design, can fix the whole device on monitoring wells with different sizes by synchronously driving the two clamping plates to move towards the direction close to each other, and can adjust the height of the protection plate according to the height of the raised ground of the monitoring wells, so that the device can be suitable for well mouths with different sizes, and the application range is improved.

Description

Wellhead protection device for engineering logging

Technical Field

The utility model relates to the technical field of wellhead protection equipment, in particular to a wellhead protection device for engineering logging.

Background

The engineering well logging is a monitoring well which is used for monitoring the water level, the water temperature and the water quality change condition of underground water by a drilling method, equipment for monitoring data information is placed at a well mouth, water samples are collected at regular time through the monitoring equipment for analysis and test, and because the monitoring well is generally arranged in the field, the external environment is easy to bring great inconvenience to the water quality monitoring work, a well mouth protection device needs to be arranged on the monitoring well, so that the accuracy of water quality monitoring is improved;

the well head protection device for the existing engineering well logging is mainly used for shielding and protecting a well head by adopting the threaded fixing of the well head above the well head when in use, the well head is only suitable for the well heads of the same specification when being installed, the well head cannot be fixed on the well heads of different sizes, the application range is limited, the use requirements cannot be met, and therefore the well head protection device for the engineering well logging is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art, and provides a wellhead protection device for engineering logging.

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

a wellhead protection device for engineering logging comprises a protection plate, wherein a mounting ring is arranged below the protection plate, a sealing rubber gasket is embedded at the bottom of the protection plate, mounting pipes are fixedly mounted on two sides of the protection plate, a thread driving mechanism is rotatably connected onto the mounting pipes, one side, close to each other, of the two thread driving mechanisms is fixedly connected with two sides of the mounting ring respectively, the two thread driving mechanisms are fixedly sleeved with the same linkage mechanism, the right side of the mounting pipe on the right side in the two mounting pipes is fixedly connected with an L-shaped positioning rod, the L-shaped positioning rod is slidably mounted on the right side of the thread driving mechanism on the right side in the two thread driving mechanisms, two clamping plates are arranged in the mounting ring, one side, close to each other, of the two clamping plates is of an arc structure, one side, close to each other, of the two clamping plates is fixedly bonded with an anti-skid rubber sheet, and a synchronous driving mechanism is mounted on the mounting ring, one side that two splint kept away from each other all with synchronous drive mechanism fixed connection.

Preferably, the thread driving mechanism comprises internal thread sleeves, one side, close to each other, of each of the two internal thread sleeves is fixedly connected with two sides of the mounting ring respectively, a first screw rod is installed in the mounting pipe in a rotating mode, the internal thread sleeves are sleeved on the corresponding first screw rods in a threaded mode, a sliding groove is formed in the right side, located on the right side, of each of the two internal thread sleeves, and the left end of the L-shaped positioning rod extends into the sliding groove and is connected with the sliding groove in a sliding mode.

Preferably, the linkage mechanism comprises two first chain wheels, the two first chain wheels are in transmission connection with the same first chain, the two first chain wheels are respectively welded and sleeved on the corresponding first screw rods, the protection plate is sleeved on the first chain, and the top ends of the first screw rods on the left side in the two first screw rods extend to the upper side of the installation pipe on the left side and are fixedly connected with knobs.

Preferably, the synchronous driving mechanism comprises two rectangular rods, one ends of the two rectangular rods, which are close to each other, are respectively fixedly connected with one side, which is far away from each other, of the two clamping plates, rectangular holes are respectively formed in the inner walls of the two sides of the mounting ring, one ends, which are far away from each other, of the two rectangular rods respectively extend into the corresponding rectangular holes, a second screw rod is rotatably arranged between the top inner wall and the bottom inner wall of the rectangular hole on the left side in the two rectangular holes, the rectangular rod on the left side in the two rectangular rods is in threaded sleeve connection with the second screw rod, the left bottom of the internal thread sleeve on the right side in the two internal thread sleeves is fixedly provided with a first locating rod, the rectangular rod on the right side is in sliding sleeve connection with the first locating rod, the mounting hole with the bottom arranged as an opening is formed in the inner wall on the left side of the mounting ring, the bottom of the clamping plate on the right side in the two clamping plates is fixedly provided with a U-shaped rod, and the right side of the U-shaped rod is fixedly connected with a second locating rod, the mounting ring sliding sleeve is arranged on the second positioning rod, a third screw rod is rotatably arranged on the inner wall of the top of the mounting hole, a moving rod is fixedly connected to the left side of the U-shaped rod, the left end of the moving rod extends into the mounting hole, the moving rod is in threaded sleeve connection with the third screw rod, a second chain wheel is fixedly connected to the left end of the second screw rod, a third chain wheel is fixedly arranged on the third screw rod, the same second chain is in transmission connection with the second chain wheel and the third chain wheel, a driving motor is fixedly arranged at the bottom of the left side of the left inner threaded sleeve, the right end of an output shaft of the driving motor is fixedly connected with the left end of the third screw rod, and the thread turning directions of the second screw rod and the third screw rod are opposite.

Preferably, a first bearing is fixedly connected between the inner walls of the two sides of the installation pipe, and the inner side of the inner ring of the first bearing is fixedly connected with the outer side of the corresponding first screw rod.

Preferably, the top of the left side of the protection plate is provided with a first through hole, the first chain is positioned in the first through hole and is not in contact with the inner wall of the first through hole, the inner wall of one side, close to each other, of the two installation pipes is provided with a second through hole, and the first chain is positioned in the second through hole and is not in contact with the inner wall of the second through hole.

Preferably, a limiting groove is formed in the inner wall of the top of the rectangular hole, a limiting block is fixedly connected to the top of the rectangular rod, and the limiting block is connected with the corresponding limiting groove in a sliding mode.

Preferably, the left end of the rectangular rod on the left side is provided with a thread groove, the thread groove is in threaded connection with the second screw, the left end of the movable rod is provided with a threaded hole, and the threaded hole is in threaded connection with the third screw.

Preferably, a second bearing is fixedly connected between the top inner wall and the bottom inner wall of the rectangular hole on the left side, the inner side of an inner ring of the second bearing is fixedly connected with the outer side of the corresponding second screw rod, a third bearing is fixedly mounted on the top inner wall of the mounting hole, and the inner side of an inner ring of the third bearing is fixedly connected with the outer side of the third screw rod.

Preferably, a rectangular groove is formed in the inner wall of the right side of the mounting ring, and the inner wall of the rectangular groove is connected with the outer side of the second positioning rod in a sliding mode.

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

when the height of the protection plate is adjusted according to the height of the monitoring well protruding out of the ground, a knob is rotated in a forward direction to drive a first screw on the left side to rotate through two first chain wheels and a first chain, so that the first screws rotate and move upwards in the corresponding internal thread sleeves, and the two first screws stop rotating the knob when driving the protection plate to move upwards to a proper height through two first bearings and two installation pipes in sequence;

establish the mounting ring on the monitoring well immediately, its bottom contacts with ground, start driving motor drive third screw rod soon forward and rotate, the third screw rod loops through the third sprocket, second chain and second sprocket drive the second screw rod and rotate, the second screw rod rotates and drives left side rectangle pole and remove right, the third screw rod rotates and drives the carriage release lever and remove left, the carriage release lever passes through the splint that U-shaped pole drove the right side and removes left, left rectangle pole drives left splint and removes right, two splint drive two non-slip rubber skins and move to the direction that is close to each other and carry out the centre gripping to the monitoring well, the knob is rotated in reverse afterwards, make the protection shield drive sealed cushion and move down and carry out the shutoff protection to the monitoring well head.

The utility model has reasonable design, can fix the whole device on monitoring wells with different sizes by synchronously driving the two clamping plates to move towards the direction close to each other, and can adjust the height of the protection plate according to the height of the raised ground of the monitoring wells, so that the device can be suitable for well mouths with different sizes, and the application range is improved.

Drawings

FIG. 1 is a schematic structural diagram of a wellhead protection device for engineering logging 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 protection plates, 1 mounting ring, 2 internal thread sleeves, 3 mounting pipes, 4 first screw rods, 5L-shaped positioning rods, 6 first chains, 7 first chain wheels, 8 clamping plates, 9 rectangular holes, 10 rectangular rods, 11U-shaped rods, 12 first positioning rods, 13 second positioning rods, 14 third screw rods, 15 moving rods, 16 mounting holes, 17 second screw rods, 18 third chain wheels, 19 driving motors and 20 second chains.

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 wellhead protection device for engineering logging comprises a protection plate 100, a mounting ring 1 is arranged below the protection plate 100, a sealing rubber pad is embedded at the bottom of the protection plate 100, mounting pipes 3 are fixedly mounted on both sides of the protection plate 100, screw driving mechanisms are rotatably connected on the mounting pipes 3, one sides of the two screw driving mechanisms, which are close to each other, are fixedly connected with both sides of the mounting ring 1 respectively, the same linkage mechanism is fixedly sleeved on the two screw driving mechanisms, an L-shaped positioning rod 5 is fixedly connected on the right side of the mounting pipe 3 on the right side in the two mounting pipes 3, the right side of the screw driving mechanism on the right side in the two screw driving mechanisms is slidably mounted on the L-shaped positioning rod 5, two clamping plates 8 are arranged in the mounting ring 1, one sides of the two clamping plates 8, which are close to each other, are both arc-shaped structures, and anti-skid rubber is fixedly bonded on one sides of the two clamping plates 8, which are close to each other, a synchronous driving mechanism is arranged on the mounting ring 1, and one sides of the two clamping plates 8, which are far away from each other, are fixedly connected with the synchronous driving mechanism;

the thread driving mechanism comprises internal thread sleeves 2, one sides of the two internal thread sleeves 2, which are close to each other, are fixedly connected with two sides of the mounting ring 1 respectively, first screw rods 4 are rotatably mounted in the mounting pipe 3, the internal thread sleeves 2 are in thread sleeve connection with the corresponding first screw rods 4, a sliding groove is formed in the right side of the internal thread sleeve 2 on the right side of the two internal thread sleeves 2, and the left end of an L-shaped positioning rod 5 extends into the sliding groove and is in sliding connection with the sliding groove;

the linkage mechanism comprises two first chain wheels 7, the two first chain wheels 7 are in transmission connection with the same first chain 6, the two first chain wheels 7 are respectively welded and sleeved on the corresponding first screw rods 4, the protection plate 100 is sleeved on the first chain 6, and the top ends of the first screw rods 4 on the left side in the two first screw rods 4 extend to the upper side of the installation pipe 3 on the left side and are fixedly connected with knobs;

the synchronous driving mechanism comprises two rectangular rods 10, one ends of the two rectangular rods 10, which are close to each other, are respectively fixedly connected with one sides of the two clamping plates 8, which are far away from each other, rectangular holes 9 are respectively formed on the inner walls of the two sides of the mounting ring 1, one ends of the two rectangular rods 10, which are far away from each other, extend into the corresponding rectangular holes 9, a second screw 17 is rotatably arranged between the top inner wall and the bottom inner wall of the rectangular hole 9 on the left side in the two rectangular holes 9, the rectangular rod 10 on the left side in the two rectangular rods 10 is in threaded sleeve connection with the second screw 17, a first positioning rod 12 is fixedly arranged at the left bottom of the internal thread sleeve 2 on the right side in the two internal thread sleeves 2, the rectangular rod 10 on the right side is in sliding sleeve connection with the first positioning rod 12, a mounting hole 16 with an opening at the bottom is formed on the inner wall on the left side of the mounting ring 1, and a U-shaped rod 11 is fixedly arranged at the bottom of the clamping plate 8 on the right side in the two clamping plates 8, the right side of the U-shaped rod 11 is fixedly connected with a second positioning rod 13, the mounting ring 1 is sleeved on the second positioning rod 13 in a sliding manner, a third screw 14 is rotatably arranged on the inner wall of the top of the mounting hole 16, the left side of the U-shaped rod 11 is fixedly connected with a moving rod 15, the left end of the moving rod 15 extends into the mounting hole 16, the moving rod 15 is sleeved on the third screw 14 in a threaded manner, the left end of the second screw 17 is fixedly connected with a second chain wheel, the third screw 14 is fixedly sleeved with a third chain wheel 18, the second chain wheel and the third chain wheel 18 are in transmission connection with the same second chain 20, the left bottom of the left internally threaded sleeve 2 is fixedly provided with a driving motor 19, the right end of an output shaft of the driving motor 19 is fixedly connected with the left end of the third screw 14, the thread turning directions of the second screw 17 and the third screw 14 are opposite, the design of the utility model is reasonable, and the mode of synchronously driving the two clamping plates 8 to move towards the direction of approaching each other, can fix whole device on the monitoring well of unidimensional not, and can carry out altitude mixture control to protection shield 100 according to the height on the protruding ground of monitoring well, make it can be applicable to the well head of different grade type size, improve application scope.

In the utility model, a first bearing is fixedly connected between the inner walls of two sides of an installation tube 3, the inner side of the inner ring of the first bearing is fixedly connected with the outer side of a corresponding first screw 4, the top of the left side of a protection plate 100 is provided with a first perforation, a first chain 6 is positioned in the first perforation and is not contacted with the inner wall of the first perforation, the inner walls of one side, close to each other, of two installation tubes 3 are respectively provided with a second perforation, the first chain 6 is positioned in the second perforation and is not contacted with the inner wall of the second perforation, the inner wall of the top of a rectangular hole 9 is provided with a limit groove, the top of the rectangular rod 10 is fixedly connected with a limit block, the limit block is connected with the corresponding limit groove in a sliding manner, the left end of the rectangular rod 10 positioned on the left side is provided with a thread groove, the thread groove is connected with a second screw 17 in a threaded manner, the left end of a moving rod 15 is provided with a thread hole, the thread hole is connected with a third screw 14, and a second bearing is fixedly connected between the inner wall of the top and the inner wall of the rectangular hole 9 positioned on the left side, the inner side of the inner ring of the second bearing is fixedly connected with the outer side of the corresponding second screw rod 17, the third bearing is fixedly installed on the inner wall of the top of the installation hole 16, the inner side of the inner ring of the third bearing is fixedly connected with the outer side of the third screw rod 14, the inner wall of the right side of the installation ring 1 is provided with the rectangular groove, and the inner wall of the rectangular groove is in sliding connection with the outer side of the second positioning rod 13.

The working principle is as follows: when the protective plate 100 is used, firstly, the height of the protective plate 100 is adjusted according to the height of the monitoring well protruding out of the ground, when the protective plate 100 is adjusted, the knob is rotated in the forward direction to drive the first screw rod 4 on the left side to rotate, the first screw rod 4 on the left side drives the first chain wheel 7 on the left side to rotate, the first chain wheel 7 on the left side drives the first chain wheel 7 on the right side to rotate through the first chain 6, the first chain wheel 7 on the right side rotates to drive the first screw rod 4 on the right side to rotate, so that the first screw rods 4 rotate in the corresponding internal thread sleeves 2 and move upwards, the first screw rods 4 drive the mounting pipes 3 to move upwards through the corresponding first bearings, the two mounting pipes 3 simultaneously drive the protective plate 100 to move upwards, and when the protective plate 100 moves upwards to a proper height, the knob stops rotating;

then the mounting ring 1 is sleeved on the monitoring well, the bottom of the mounting ring 1 is contacted with the ground, the monitoring well is positioned between the two clamping plates 8, then the driving motor 19 is started in the forward direction, the output shaft of the driving motor 19 drives the third screw 14 to rotate, the third screw 14 drives the third chain wheel 18 to rotate, the third chain wheel 18 drives the second chain wheel to rotate through the second chain 20, the second chain wheel drives the second screw 17 to rotate, so that the second screw 17 and the third screw 14 rotate simultaneously, under the action of the thread groove formed on the left rectangular rod 10, the second screw 17 drives the left rectangular rod 10 to move rightwards while rotating, under the action of the thread hole formed on the moving rod 15, the moving rod 14 drives the moving rod 15 to move leftwards while rotating, the moving rod 15 drives the right clamping plate 8 to move leftwards through the U-shaped rod 11, and the left rectangular rod 10 drives the left clamping plate 8 to move rightwards simultaneously, the right clamping plate 8 drives the right rectangular rod 10 to slide leftwards on the first positioning rod 12, the U-shaped rod 11 drives the second positioning rod 13 to slide leftwards in the rectangular groove, the two clamping plates 8 drive the two anti-skid rubber sheets to move towards the mutually approaching direction and clamp the monitoring well, so that the whole device is fixed on the monitoring well, and the whole device can be fixed on the monitoring wells with different sizes by synchronously driving the two clamping plates 8 to move towards the mutually approaching direction, so that the application range is improved;

next the backspin knob, the motion process who rotates the knob with forward on the same principle is opposite for protection shield 100 drives sealed cushion and moves down and carries out the shutoff to the monitoring well head, through the sealed cushion of protection shield 100 cooperation, realizes the protection of sheltering from to the monitoring well head, and can adjust protection shield 100 according to the height on the protruding ground of monitoring well, makes it can be applicable to the well head of different bellied heights.

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. A wellhead protection device for engineering logging comprises a protection plate (100), wherein a mounting ring (1) is arranged below the protection plate (100), and a sealing rubber gasket is embedded at the bottom of the protection plate (100), the wellhead protection device is characterized in that mounting pipes (3) are fixedly mounted on both sides of the protection plate (100), a thread driving mechanism is rotatably connected on the mounting pipes (3), one side, close to each other, of the two thread driving mechanisms is fixedly connected with both sides of the mounting ring (1), the two thread driving mechanisms are fixedly sleeved with a same linkage mechanism, an L-shaped positioning rod (5) is fixedly connected on the right side of the mounting pipe (3) on the right side in the two mounting pipes (3), the L-shaped positioning rod (5) is slidably mounted on the right side of the thread driving mechanism on the right side in the two thread driving mechanisms, two clamping plates (8) are arranged in the mounting ring (1), one side that two splint (8) are close to each other all establishes to the arc structure, and one side that two splint (8) are close to each other all bonds and is fixed with anti-skidding rubber, installs synchronous drive mechanism on collar (1), and one side that two splint (8) kept away from each other all with synchronous drive mechanism fixed connection.

2. The wellhead protection device for engineering logging according to claim 1, wherein the thread driving mechanism comprises internal thread sleeves (2), one side, close to each other, of each of the two internal thread sleeves (2) is fixedly connected with two sides of the mounting ring (1), a first screw (4) is rotatably mounted in the mounting tube (3), the internal thread sleeves (2) are sleeved on the corresponding first screws (4) in a threaded manner, a sliding groove is formed in the right side of the internal thread sleeve (2) on the right side of the two internal thread sleeves (2), and the left end of the L-shaped positioning rod (5) extends into the sliding groove and is in sliding connection with the sliding groove.

3. The wellhead protection device for engineering logging according to claim 1, wherein the linkage mechanism comprises two first chain wheels (7), the two first chain wheels (7) are in transmission connection with a same first chain (6), the two first chain wheels (7) are respectively welded and sleeved on the corresponding first screw rods (4), the protection plate (100) is sleeved on the first chain (6), and the top ends of the first screw rods (4) on the left side in the two first screw rods (4) extend to the upper side of the mounting pipe (3) on the left side and are fixedly connected with a knob.

4. The wellhead protection device for engineering logging according to claim 1, wherein the synchronous driving mechanism comprises two rectangular rods (10), one end of each rectangular rod (10) close to each other is fixedly connected with one side of each clamping plate (8) far away from each other, rectangular holes (9) are respectively formed in the inner walls of the two sides of the mounting ring (1), one ends of each rectangular rod (10) far away from each other extend into the corresponding rectangular holes (9), a second screw (17) is rotatably mounted between the top inner wall and the bottom inner wall of the rectangular hole (9) on the left side in the two rectangular holes (9), the rectangular rod (10) on the left side in the two rectangular rods (10) is sleeved on the second screw (17) in a threaded manner, and a first positioning rod (12) is fixedly mounted at the bottom of the left side of the internal thread bushing (2) on the right side in the two internal thread bushings (2), a rectangular rod (10) positioned on the right side is slidably sleeved on the first positioning rod (12), a mounting hole (16) with an opening at the bottom is formed in the inner wall of the left side of the mounting ring (1), a U-shaped rod (11) is fixedly mounted at the bottom of the clamping plate (8) positioned on the right side in the two clamping plates (8), a second positioning rod (13) is fixedly connected to the right side of the U-shaped rod (11), the mounting ring (1) is slidably sleeved on the second positioning rod (13), a third screw (14) is rotatably mounted on the inner wall of the top of the mounting hole (16), a moving rod (15) is fixedly connected to the left side of the U-shaped rod (11), the left end of the moving rod (15) extends into the mounting hole (16), the moving rod (15) is threadedly sleeved on the third screw (14), a second chain wheel is fixedly connected to the left end of the second screw (17), and a third chain wheel (18) is fixedly sleeved on the third screw (14), the second chain wheel and the third chain wheel (18) are connected with the same second chain (20) in a transmission mode, a driving motor (19) is fixedly installed at the bottom of the left side of the left internal thread sleeve (2), the right end of an output shaft of the driving motor (19) is fixedly connected with the left end of the third screw (14), and the thread turning directions of the second screw (17) and the third screw (14) are opposite.

5. The wellhead protection device for engineering logging according to claim 2, wherein a first bearing is fixedly connected between the inner walls of the two sides of the installation pipe (3), and the inner side of an inner ring of the first bearing is fixedly connected with the outer side of the corresponding first screw (4).

6. A wellhead protection device for engineering logging according to claim 3, characterized in that the top of the left side of the protection plate (100) is provided with a first through hole, the first chain (6) is located in the first through hole and is not in contact with the inner wall of the first through hole, the inner walls of the two installation pipes (3) close to each other are provided with a second through hole, and the first chain (6) is located in the second through hole and is not in contact with the inner wall of the second through hole.

7. The wellhead protection device for engineering logging according to claim 4, wherein a limiting groove is formed in the inner wall of the top of the rectangular hole (9), a limiting block is fixedly connected to the top of the rectangular rod (10), and the limiting block is slidably connected with the corresponding limiting groove.

8. A wellhead protection device for engineering logging according to claim 4, characterized in that the left end of the rectangular rod (10) on the left side is provided with a threaded groove, the threaded groove is in threaded connection with the second screw (17), the left end of the movable rod (15) is provided with a threaded hole, and the threaded hole is in threaded connection with the third screw (14).

9. A wellhead protection device for engineering logging according to claim 4, characterized in that a second bearing is fixedly connected between the top inner wall and the bottom inner wall of the rectangular hole (9) on the left side, the inner side of the inner ring of the second bearing is fixedly connected with the outer side of the corresponding second screw (17), a third bearing is fixedly mounted on the top inner wall of the mounting hole (16), and the inner side of the inner ring of the third bearing is fixedly connected with the outer side of the third screw (14).

10. The wellhead protection device for engineering logging according to claim 4, characterized in that a rectangular groove is formed on the inner wall of the right side of the mounting ring (1), and the inner wall of the rectangular groove is connected with the outer side of the second positioning rod (13) in a sliding manner.