Well cementation equipment based on petroleum well cementation cement

Abstract

The invention relates to the technical field of oil well cementation, in particular to oil well cementation cement-based well cementation equipment, which comprises a cylinder, a first fixing block is arranged on the inner side of the cylinder. A conical surface is arranged inside the cylinder; one side of the first fixing block is rotationally connected with a second fixing block, and the second fixing block makes contact with the cylinder. When the steel pipe slides down, a worker treads the pull rod to control the first clamping block to clamp the steel pipe, the steel pipe is prevented from sliding down into a petroleum well, the pull rod used for facilitating manual lifting of the equipment has the function of lengthening a force arm in the process, the first clamping block can apply large clamping force to the steel pipe after the worker treads the end of the pull rod, and the steel pipe is prevented from sliding down. And in addition, after treading force acts on the pull rod, the sinking effect of the first fixing block, the second fixing block and the third fixing block can be improved, so that the first fixing block, the second fixing block and the third fixing block are further tightened, the rubber pad is further pressed on the outer side of the steel pipe, and the fixing effect is further improved.

Description

Technical Field

[0001] This invention relates to the technical field of oil well cementing. More specifically, this invention relates to a cementing device based on oil well cementing cement. Background Technology

[0002] In cementing operations at oil wells, multiple sections of steel pipe need to be lowered sequentially into a wellbore of considerable depth, and cementing cement needs to be poured into the well. Due to the limited length of a single steel pipe, a segmented connection method must be used to complete the well lowering operation.

[0003] The specific process is as follows: First, using hoisting equipment, the first section of steel pipe is vertically hoisted above the wellhead and slowly lowered into the well, ensuring its upper end remains protruding above the wellhead. Then, a fixing device is installed on the outside of the steel pipe, and the hoisting equipment continues to lower the pipe and fixing device together until the fixing device is secured at the wellhead, temporarily fixing the steel pipe. Next, the hoisting equipment lifts the second section of steel pipe, aligns it, and screws it onto the top of the first section. After connection, the original fixing device is removed, and the hoisting equipment lowers both connected sections of steel pipe as a whole, ensuring the first section is fully inside the well while the upper end of the second section remains protruding above the wellhead. A fixing device is then installed on the second section and secured to the wellhead. This process is repeated, connecting and lowering steel pipes section by section until the designed depth is reached.

[0004] However, because the fixing device needs to be repeatedly disassembled and reused, it is usually designed to be lightweight and relies on friction to clamp the steel pipe. When the surface of the steel pipe is covered with oil, mud, or other impurities, the coefficient of friction of the contact surface is significantly reduced, causing the fixing device to fail to lock effectively, posing a safety risk of the steel pipe slipping or even falling into the well. Summary of the Invention

[0005] To overcome the drawback that the friction coefficient of the contact surface is significantly reduced when oil, mud or other impurities adhere to the surface of the steel pipe, making it impossible for existing fixing devices to effectively lock it, this invention provides a cementing device based on oil cementing cement.

[0006] Technical Solution: A cementing device based on oil well cementing cement, comprising a cylinder, a fixing block one, a fixing block two, and a fixing block three; fixing block one is disposed on the inner side of the cylinder; a conical surface is disposed on the inner side of the cylinder; fixing block two is rotatably connected to one side of fixing block one, and fixing block two contacts the cylinder; fixing block three is rotatably connected to the other side of fixing block one, and fixing block three contacts the cylinder; it also includes rubber pads; a rubber pad is fixedly attached to each of fixing block one, fixing block two, and fixing block three; a clamping block one is slidably connected to each of fixing block one, fixing block two, and fixing block three; a linkage block one is fixedly attached to each clamping block one; fixing block one, fixing block two, and fixing block three are all connected to corresponding... The linkage block 1 is slidably connected; each of the fixed blocks 1, 2, and 3 has a sliding linkage block 2, which contacts the corresponding linkage block 1; the contact surfaces of the linkage blocks 1 and 2 are all set as inclined surfaces; the linkage blocks 1 and 2 cooperate; each of the fixed blocks 1, 2, and 3 has a fixed limiting block 1; each linkage block 2 has a sliding groove, and the limiting block 1 is located inside the corresponding sliding groove; each clamping block 1 has several springs 1 fixedly connected; each of the fixed blocks 1, 2, and 3 is fixedly connected to the corresponding spring 1; a lifting assembly is connected to the fixed block 1; the lifting assembly drives the fixed block 1 to move.

[0007] To further explain, the lifting assembly includes a connecting block 1 and a pull rod; a connecting block 1 is fixedly connected to each of the fixing blocks 1, 2, and 3; and a pull rod is connected to each connecting block 1 via a torsion spring shaft.

[0008] Further explanation: It also includes a protective component, which includes a second clamping block, a second connecting block, a round rod, a slider, and a second spring. Each clamping block has a second clamping block slidably connected to it. Each clamping block has a second connecting block fixedly connected to it, and the second connecting block is slidably connected to the corresponding clamping block. Each connecting block has a round rod fixedly connected to it, and the round rod is slidably connected to the corresponding clamping block. Each clamping block has a cavity. Each round rod has a slider fixedly connected to it, and the slider slides inside the corresponding cavity. The slider has several micro-holes. Each round rod has a second spring fitted on it, one end of which is fixedly connected to the corresponding clamping block, and the other end of which is fixedly connected to the corresponding connecting block.

[0009] To further explain, the second clamping block is equipped with several elongated teeth.

[0010] To further explain, the connecting block 2 has a groove.

[0011] Further explanation: It also includes a safety component, which includes a limit block two and a lever; a limit block two is slidably connected to each of the fixing block one, fixing block two and fixing block three; each limit block two is provided with a protrusion, which contacts the corresponding lever; each limit block two is connected to a lever via a torsion spring shaft.

[0012] Further explanation: it also includes spring three; the limiting block two is set in an arc shape; and several spring three are fixedly connected between the fixing block one, fixing block two and fixing block three and the corresponding limiting block two.

[0013] To further explain, it also includes rubber blocks; each of the two ends of each limiting block 2 is fixed with a rubber block, and adjacent rubber blocks are in contact with each other.

[0014] To further explain, the contact surfaces of both linkage block one and linkage block two are designed to be wear-resistant.

[0015] To further explain, a handle is provided at the end of the lever.

[0016] The beneficial effects of this invention are as follows: First, when the steel pipe slides down, the manual operator can control the clamping block one to clamp the steel pipe by stepping on the pull rod, preventing the steel pipe from sliding down into the oil well. Furthermore, the pull rod, which is used to facilitate manual lifting of this equipment, has the function of extending the lever arm during this process, so that the clamping block one can apply a larger clamping force to the steel pipe after the manual operator steps on the end of the pull rod, which is beneficial to improving the fixing effect. Moreover, after the stepping force is applied to the pull rod, it will also improve the sinking effect of fixing block one, fixing block two, and fixing block three, thereby further tightening fixing block one, fixing block two, and fixing block three, further pressing the rubber pad on the outside of the steel pipe, and further improving the fixing effect.

[0017] Second, by using a movable clamping block two to clamp the steel pipe instead of clamping block one, the steel pipe is buffered by the pressure oil resistance, which can prevent relative sliding between the steel pipe and clamping block two, and thus avoid the problem of scratches and rust on the steel pipe.

[0018] Third, during the regular construction process, the tie rod is blocked and limited by the limit block two to prevent the auxiliary clamping operation from being activated due to accidental stepping on the tie rod by the operator, thereby avoiding the failure of the scratch protection function of the clamp block two.

[0019] Fourth, by setting the second limiting block to an arc shape, it is possible to unlock all three limiting blocks simultaneously by pushing only one of them, which helps to improve unlocking efficiency.

[0020] Fifth, by setting a rubber block at the end of the second limiting block to transmit thrust, the three second limiting blocks can be unlocked smoothly without interfering with the tightening operation of the first, second and third fixed blocks. Attached Figure Description

[0021] Figure 1 A schematic diagram of the cementing equipment based on oil cementing cement of the present invention is shown;

[0022] Figure 2 A schematic diagram of the structure of the cylinder of the present invention is shown;

[0023] Figure 3 A top view of the cementing equipment based on oil cementing cement of the present invention is shown;

[0024] Figure 4 A schematic diagram of the structure of the protective component of the present invention is shown;

[0025] Figure 5 A right view of the protective component of the present invention is shown;

[0026] Figure 6 A schematic diagram of the structure of the spring of the present invention is shown;

[0027] Figure 7 A schematic diagram of the structure of the insurance component of the present invention is shown.

[0028] In the attached diagrams: 1-cylinder, 2-fixed block one, 3-fixed block two, 4-fixed block three, 5-rubber pad, 6-clamping block one, 7-linkage block one, 8-linkage block two, 9-limiting block one, 10-spring one, 201-connecting block one, 202-pull rod, 203-clamping block two, 204-connecting block two, 205-round rod, 206-slider, 207-spring two, 208-limiting block two, 209-lever, 2010-spring three, 2011-rubber block, 91-slide groove, 92-cavity, 93-protrusion. Detailed Implementation

[0029] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0030] Example 1: A cementing device based on oil well cementing cement, such as... Figures 1-6As shown, the assembly includes a cylinder 1, a fixing block 2, a fixing block 3, and a fixing block 4; a fixing block 2 is disposed on the inner side of the cylinder 1; a conical surface is disposed on the inner side of the cylinder 1; a fixing block 3 is rotatably connected to one side of the fixing block 2; a fixing block 4 is rotatably connected to the other side of the fixing block 2; both the fixing blocks 3 and 4 are in contact with the cylinder 1; the assembly also includes a rubber pad 5, a clamping block 6, a linkage block 7, a linkage block 8, a limiting block 9, a spring 10, and a lifting assembly; a rubber pad 5 is fixedly attached to each of the fixing blocks 2, 3, and 4; a clamping block 6 is slidably connected to each of the fixing blocks 2, 3, and 4, and the clamping block 6 is made of alloy material; a linkage block 7 is fixedly attached to each clamping block 6. Linkage block 1 7 is made of alloy material; fixing block 1 2, fixing block 2 3, and fixing block 3 4 are all slidably connected to the corresponding linkage block 1 7; a linkage block 2 8 is slidably connected to each of fixing block 1 2, fixing block 2 3, and fixing block 3 4, and linkage block 2 8 is in contact with the corresponding linkage block 1 7; the contact surfaces of linkage block 1 7 and linkage block 2 8 are all set as inclined surfaces; a limiting block 1 9 is fixedly connected to each of fixing block 1 2, fixing block 2 3, and fixing block 3 4; a sliding groove 91 is opened on each linkage block 2 8; the limiting block 1 9 slides in the corresponding sliding groove 91; four springs 10 are fixedly connected to each clamping block 1 6; fixing block 1 2, fixing block 2 3, and fixing block 3 4 are all fixedly connected to the corresponding springs 10; a lifting assembly is connected to fixing block 1 2.

[0031] The lifting assembly includes a connecting block 201 and a pull rod 202; a connecting block 201 is fixedly attached to each of the fixing blocks 2, 3, and 4; each connecting block 201 is connected to a pull rod 202 via a torsion spring shaft. The manual pull rod 202 drives the connecting block 201 to move upward, which in turn drives the fixing blocks 2, 3, and 4 to move upward.

[0032] First, cylinder 1 is installed at the wellhead of the oil well, with its upper end flush with the ground. Then, a crane is used to vertically lift the first section of steel pipe, allowing its lower part to pass through cylinder 1 and be inserted into the oil well. Next, the tie rod 202 and its components are manually lifted and wrapped around the upper outer side of the first section of steel pipe. The crane continues to lower the first section of steel pipe, while the crane manually lowers the tie rod 202 and its components, ensuring that the first section of steel pipe and the tie rod 202 and its components descend synchronously until fixing blocks 1 (2), 2 (3), and 3 (4) are simultaneously engaged inside cylinder 1. At this point, the conical surface inside cylinder 1 limits the movement of fixing blocks 2, 3, and 4, causing them to tighten and press the three rubber pads 5 against the outside of the first steel pipe section. Then, the crane is removed. At this time, a large frictional force is generated between the first steel pipe section and the three rubber pads 5. That is, the weight of the first steel pipe section acts on the tie rod 202 and its components, causing the tie rod 202 and its components to sink slightly. This further tightens the fixing blocks 2, 3, and 4, thus further pressing the three rubber pads 5 against the outside of the first steel pipe section. On the outside of one section of steel pipe, the clamping force on the first section of steel pipe is further increased to achieve stable clamping of the first section of steel pipe. At this time, the upper end of the first section of steel pipe is exposed outside the oil well. Then, the second section of steel pipe is transferred above the first section of steel pipe by a crane. Then, the lower end of the second section of steel pipe is manually tightened to the upper end of the first section of steel pipe. Then, the crane drives the second section of steel pipe and the first section of steel pipe to move upward. At the same time, the operator bends over and pulls the tie rod 202 to the vertical device, which then drives the tie rod 202 and its parts to move upward, so that the steel pipe and the tie rod 202 and its parts move upward synchronously. After the parts are moved to the outside of the cylinder 1, the fixing blocks 1 2, 2 3 and 3 4 are manually unfolded, thereby removing the tie rod 202 and its parts from the outside of the steel pipe. Then, the first and second steel pipe sections are moved downward by the crane, so that the first steel pipe section is fully inserted into the oil well and the lower part of the second steel pipe section is inserted into the oil well. The above operation is repeated, and the second steel pipe section is fixed at the wellhead by the tie rod 202 and its parts, and the upper end of the second steel pipe section is exposed outside the oil well. This process is repeated, connecting and lowering the steel pipe section by section until the design depth is reached.

[0033] It also includes a protective component, which includes a second clamping block 203, a second connecting block 204, a round rod 205, a slider 206, and a second spring 207. Each first clamping block 6 is slidably connected to a second clamping block 203, which assists in clamping the steel pipe. Each second clamping block 203 is welded to a second connecting block 204, which is slidably connected to the corresponding first clamping block 6. The second connecting block 204 is made of alloy material. Each second connecting block 204 is welded to a round rod 205, which is slidably connected to the corresponding first clamping block 6. Each first clamping block 6 has a cavity 92. Each round rod 205 is fixedly connected to a slider 206, which slides inside the corresponding cavity 92. The slider 206 has several micro-holes. Each second connecting block 204 is fixedly connected to the corresponding first clamping block 6, and a second spring 207 is fixedly connected between them.

[0034] The clamping block 203 is equipped with several long teeth, which helps to improve clamping stability.

[0035] The connecting block 204 has a groove to accommodate the compressed spring 207 and avoid interference.

[0036] During the above operation, if impurities such as mud, sand, or oil remain on the surface of the steel pipe, the friction between the steel pipe and the rubber pad 5 will be significantly reduced. When the crane on the steel pipe is removed, the steel pipe will slide down. Therefore, clamping block 6 is added to fixing block 1 2, fixing block 2 3, and fixing block 3 4. When the crane on the steel pipe is removed, if the steel pipe is observed to slide down, the end of the pull rod 202 away from the steel pipe is stepped on. The pull rod 202 rotates downward around the connecting block 1 201, causing the pull rod 202 to move downward. 02. Pushing the second linkage block 8 downwards causes the second linkage block 8 to push the first linkage block 7 towards the steel pipe. The first linkage block 7 drives the clamping block 6 towards the steel pipe and stretches the first spring 10, thus pressing the clamping block 6 against the outer side of the steel pipe. At this time, the steel pipe is clamped by the rubber pad 5 and the clamping block 6. After the stepping force is applied to the pull rod 202, it will also improve the sinking effect of the first fixing block 2, the second fixing block 3, and the third fixing block 4, thereby making the first fixing block 2, the second fixing block 3, and the third fixing block 4 sink further. 4. Tighten further, pressing the rubber pad 5 further against the outside of the steel pipe to increase the clamping force and clamp the steel pipe to prevent it from sliding into the oil well. At this time, control the crane to re-fix the upper end of the steel pipe and lift it upward. Then clean the impurities remaining on the surface of the steel pipe before lowering it down. When the steel pipe slides down, the operator can manually control the clamping block 6 by stepping on the pull rod 202 to clamp the steel pipe and prevent it from sliding into the oil well. The pull rod 202, which is used to facilitate manual lifting of the equipment, has the function of extending the lever arm during this process. This allows the clamping block 6 to apply a larger clamping force to the steel pipe after the operator steps on the end of the pull rod 202, which is beneficial to improving the fixing effect. Moreover, the stepping force applied to the pull rod 202 will also improve the sinking effect of fixing block 2, fixing block 3, and fixing block 4, thereby further tightening the fixing block 2, fixing block 3, and fixing block 4 and pressing the rubber pad 5 further against the outside of the steel pipe to further improve the fixing effect.

[0037] When clamping the steel pipe using clamping block 6, to avoid the influence of oil on the clamping operation, clamping block 6 does not have rubber parts to protect the steel pipe. Instead, it has long teeth to increase the clamping force. In the initial stage of clamping the steel pipe, due to the steel pipe's downward inertia and the relatively small clamping force, relative sliding may occur between the steel pipe and clamping block 6, scratching the steel pipe surface and making it prone to rusting and reducing its lifespan. Therefore, a protective component is installed on clamping block 6. When the lever 202 is manually stepped on, clamping block 6 moves its parts towards the steel pipe, causing clamping block 203 to contact and clamp the steel pipe. Under inertia, the steel pipe moves clamping block 203 downward, clamping... Block 203 drives connecting block 204 downward and stretches spring 207. Connecting block 204 drives round rod 205 downward, which in turn drives slider 206 downward. Cavity 92 is filled with pressurized oil. During this process, the pressurized oil needs to pass through the micro-holes on slider 206, thus generating significant resistance to buffer the steel pipe and prevent relative sliding between the steel pipe and clamping block 203, thereby avoiding scratches and rust on the steel pipe. In use, movable clamping block 203 replaces clamping block 16 to clamp the steel pipe, thereby buffering the steel pipe through the resistance of pressurized oil, preventing relative sliding between the steel pipe and clamping block 203, and thus avoiding scratches and rust on the steel pipe.

[0038] Example 2, based on Example 1, such as Figure 6 and Figure 7 As shown, it also includes a safety component, which includes a limit block 208 and a lever 209; a limit block 208 is slidably connected to each of the fixing blocks 2, 3, and 4; each limit block 208 is provided with a protrusion 93, which contacts the corresponding pull rod 202; the pull rod 202 is limited by the limit block 208; each limit block 208 is connected to a lever 209 via a torsion spring shaft.

[0039] It also includes spring 3 2010; limit block 2 208 is set in arc shape; two springs 3 2010 are fixed between fixed block 1 2, fixed block 2 3 and fixed block 3 4 and the corresponding limit block 2 208.

[0040] During normal construction, if the pull rod 202 is accidentally stepped on, the slider 206 will move to the lower part of the cavity 92. After the person stops stepping on the pull rod 202, the stretched spring 207 will rebound, causing the connecting block 204 to move upward. The connecting block 204 will then cause the clamping block 203 to move upward, which in turn will cause the round rod 205 to move upward. The round rod 205 will then cause the slider 206 to move upward. During this process, the pressurized oil needs to pass through the micro-holes on the slider 206, which will generate significant resistance. This means that the spring force of the spring 207 alone will take a long time to reset the slider 206, and the reset of the clamping block 203 will also take a long time. If the steel pipe slides down during this period... If the clamping block 203 is not fully reset, it cannot provide scratch protection. Therefore, a limiting block 208 is added to the fixing block 2, fixing block 3, and fixing block 4. During normal construction, the limiting block 208 blocks the pull rod 202 to prevent the auxiliary clamping operation from being activated due to accidental stepping on the pull rod 202, thus avoiding the failure of the scratch protection function of the clamping block 203. When the steel pipe slides down, the operator moves the limiting block 208 to slide through the lever 209, so that the protrusion 93 on the limiting block 208 moves away from the bottom of the pull rod 202, thereby stopping the limiting block 208 from limiting the pull rod 202. At this time, the auxiliary clamping operation is activated through the pull rod 202.

[0041] When the steel pipe slides down, the operator needs to unlock the limiting blocks 208 on the fixing blocks 1, 2, 3, and 4 in sequence before the auxiliary clamping operation can be initiated via the lever 202. This process is cumbersome and inefficient. Therefore, the limiting blocks 208 are made into an arc shape. When unlocking, the operator moves one of the limiting blocks 208 to slide using the lever 209, and compresses or stretches the spring 3 2010. This causes the other two limiting blocks 208 to slide, thus unlocking all three limiting blocks 208 simultaneously, significantly improving unlocking efficiency. In use, by making the limiting blocks 208 into an arc shape, only one limiting block 208 needs to be moved to unlock all three limiting blocks 208 simultaneously, which further improves unlocking efficiency.

[0042] It also includes rubber blocks 2011; each of the two ends of each limiting block 208 is fixed with a rubber block 2011, and adjacent rubber blocks 2011 are in contact with each other.

[0043] The contact surfaces of both linkage block 7 and linkage block 8 are designed to be wear-resistant to reduce wear and improve service life.

[0044] A handle is provided at the end of the lever 202, which can be manually used to move the lever 202, making it more convenient to apply force.

[0045] Under different stress conditions, the tightening degree of fixing blocks 2, 3, and 4 varies. If the ends of the three limiting blocks 208 are tightly fitted together, it will interfere with the tightening operation. If the ends of the three limiting blocks 208 are far apart, it will interfere with the unlocking operation. Therefore, a rubber block 2011 is provided at the end of the limiting block 208. When fixing blocks 2, 3, and 4 tighten, the limiting blocks 208 will adaptively compress the rubber block 2011, thereby avoiding interference with the tightening operation. During unlocking, the limiting blocks 208... Position block 208 pushes the adjacent limit block 208 to move through rubber block 2011. During this process, the resistance generated by spring 3 2010 on limit block 208 is insufficient to compress rubber block 2011, so that rubber block 2011 can stably transmit thrust, thereby enabling the three limit blocks 208 to unlock smoothly. In use, by setting rubber block 2011 at the end of limit block 208 to transmit thrust, the three limit blocks 208 can be unlocked smoothly without interfering with the tightening operation of fixed block 1 2, fixed block 2 3 and fixed block 3 4.

[0046] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. A well cementing device based on petroleum cementing cement, comprising a cylinder (1); a fixed block one (2) is arranged on the inner side of the cylinder (1); a conical surface is arranged on the inner side of the cylinder (1); a fixed block two (3) is rotatably connected to one side of the fixed block one (2), and the fixed block two (3) is in contact with the cylinder (1); a fixed block three (4) is rotatably connected to the other side of the fixed block one (2), and the fixed block three (4) is in contact with the cylinder (1); characterized in that: It also includes a rubber pad (5); a rubber pad (5) is fixedly attached to each of the fixing blocks 1 (2), 2 (3), and 3 (4); a clamping block 1 (6) is slidably connected to each of the fixing blocks 1 (2), 2 (3), and 3 (4); a linkage block 1 (7) is fixedly attached to each clamping block 1 (6); the fixing blocks 1 (2), 2 (3), and 3 (4) are slidably connected to the corresponding linkage block 1 (7); a linkage block 2 (8) is slidably connected to each of the fixing blocks 1 (2), 2 (3), and 3 (4), and the linkage block 2 (8) is in contact with the corresponding linkage block 1 (7); the linkage block 1 (7) The contact surfaces with the second linkage block (8) are all set as inclined surfaces; the first linkage block (7) cooperates with the second linkage block (8); a limiting block (9) is fixedly connected to the first fixing block (2), the second fixing block (3) and the third fixing block (4); a sliding groove (91) is opened on each second linkage block (8), and the limiting block (9) is located inside the corresponding sliding groove (91); several springs (10) are fixedly connected to each clamping block (6); the first fixing block (2), the second fixing block (3) and the third fixing block (4) are all fixedly connected to the corresponding springs (10); a lifting assembly is connected to the first fixing block (2); the first fixing block (2) is moved by the lifting assembly. ​ 2. A cementing device based on oil well cementing as described in claim 1, characterized in that: The lifting assembly includes a connecting block 1 (201) and a pull rod (202); a connecting block 1 (201) is fixedly attached to each of the fixing blocks 1 (2), 2 (3) and 3 (4); a pull rod (202) is connected to each connecting block 1 (201) via a torsion spring shaft.

3. A cementing device based on oil well cementing as described in claim 2, characterized in that: It also includes a protective component, which includes a clamping block two (203), a connecting block two (204), a round rod (205), a slider (206), and a spring two (207); a clamping block two (203) is slidably connected to each clamping block one (6); a connecting block two (204) is fixedly connected to each clamping block two (203), and the connecting block two (204) is slidably connected to the corresponding clamping block one (6); a round rod (205) is fixedly connected to each connecting block two (204), and the round rod (205) is slidably connected to the corresponding clamping block one (6). The clamping blocks (6) are slidably connected; each clamping block (6) has a cavity (92); each round rod (205) has a slider (206) fixedly connected to it, and the slider (206) slides inside the corresponding cavity (92); the slider (206) has several micro holes; each round rod (205) has a spring (207) sleeved on it, one end of the spring (207) is fixedly connected to the corresponding clamping block (6), and the other end of the spring (207) is fixedly connected to the corresponding connecting block (204).

4. A cementing device based on oil well cementing as described in claim 3, characterized in that: The clamping block 2 (203) has several long teeth.

5. A cementing device based on oil well cementing as described in claim 4, characterized in that: A groove is provided on the connecting block 2 (204).

6. A cementing device based on oil well cementing as described in claim 4, characterized in that: It also includes a safety component, which includes a limit block two (208) and a lever (209); a limit block two (208) is slidably connected to each of the fixing block one (2), fixing block two (3) and fixing block three (4); each limit block two (208) is provided with a protrusion (93), which contacts the corresponding pull rod (202); each limit block two (208) is connected to a lever (209) through a torsion spring shaft.

7. A cementing device based on oil well cementing as described in claim 6, characterized in that: It also includes spring three (2010); limit block two (208) is set in arc shape; fixed block one (2), fixed block two (3) and fixed block three (4) are all fixedly connected to the corresponding limit block two (208) by several spring three (2010).

8. A cementing device based on oil well cementing according to claim 7, characterized in that: It also includes rubber blocks (2011); each of the two ends of each limiting block (208) is fixed with a rubber block (2011), and the adjacent rubber blocks (2011) are in contact with each other.

9. A cementing device based on oil well cementing as described in claim 8, characterized in that: The contact surfaces of both linkage block 1 (7) and linkage block 2 (8) are set as wear-resistant surfaces.

10. A cementing device based on oil well cementing according to any one of claims 2-9, characterized in that: A handle is provided at the end of the lever (202).

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