A drill pipe puller

Abstract

The present application provides a kind of pull drill rod machine, including card seat, fixed outer ring A, fixed outer ring B, lifting oil cylinder A, lifting oil cylinder B, lifting oil cylinder C and lifting oil cylinder D, hydraulic nitrogen hammer assembly, mud water faucet;Fixed outer ring A is equipped with downwardly extending connecting pipe A, fixed outer ring B is equipped with downwardly extending connecting pipe B, the middle part of card seat is equipped with mounting hole, connecting pipe A passes through the mounting hole and is connected with connecting pipe B and clamps card seat, and the lower end of connecting pipe B is used to connect drill rod;The upper part and lower part of lifting oil cylinder are fixed with the hydraulic nitrogen hammer assembly, and the working end of the hydraulic nitrogen hammer assembly corresponds fixed outer ring A or fixed outer ring B respectively;Mud water faucet is used to connect the upper end of drill rod to inject mud into drill rod;Lifting oil cylinder assembly pulls card seat upward at the same time, and hydraulic nitrogen hammer assembly strikes fixed outer ring, so that drill rod is subjected to pulling force and vibration force, mud is injected into drill rod through grouting water faucet, and the position of card point is washed.

Description

Technical Field

[0001] This invention belongs to the field of exploration equipment technology, and in particular relates to a drill rod pulling machine. Background Technology

[0002] As drilling depths increase in oil and gas exploration, resource exploration, and infrastructure construction, drill pipes penetrate deeper into the ground, making drill pipe extraction and retrieval increasingly difficult. Encountering frozen soil, fine sand, or soil layers with negative skin friction exponentially increases the difficulty of drill pipe extraction. Traditional drill pipe extraction machines sometimes encounter situations where the drill pipe gets stuck. While increasing the pulling force can help, this forced extraction can damage the drill pipe, endanger personnel, and harm equipment such as the drilling rig. To facilitate extraction, vibration devices are often installed to loosen the soil in contact with the drill pipe, reducing the pulling force and making extraction easier. However, methods like striking or vibrating the drill pipe have drawbacks: the vibration force is relatively weak, having limited effectiveness on drill pipes exceeding 100 meters; and the drill pipe is in a free-swinging state, making it prone to tilting and hindering extraction. During production, drill rods often become impossible to pull out, forcing the original hole position to be left untouched. This results in significant investment, money, and time being wasted, leading to economic losses and creating substantial hidden dangers for subsequent pile foundation construction. Similarly, in the application of metal casings, situations arise where the outer wall gets stuck with the surrounding soil and rock when the casing is deep underground, encountering the same difficulties as with drill rods when it cannot be pulled out. Summary of the Invention

[0003] This invention aims to solve the problem of difficulty in pulling out drill rods when the drill rod is at a large depth, and provides a drill rod pulling machine that reduces the friction between the pipe wall and the surrounding soil layer through vibration, reduces the resistance to pulling out the drill rod, and makes it easier to pull out the drill rod.

[0004] To achieve the above-mentioned objectives, the present invention provides a drill rod extraction machine, including a chuck, a fixed outer ring A, a fixed outer ring B, a lifting cylinder assembly, a hydraulic nitrogen hammer assembly, a mud faucet, and a pad. The fixed outer ring A has a connecting pipe A extending upward and downward in the middle of the through-disc, and the fixed outer ring B has a connecting pipe B extending downward in the middle of the through-disc. The card seat has a mounting hole in the middle. The connecting pipe A passes through the mounting hole and connects with the connecting pipe B to clamp the card seat. The lower end of the connecting pipe B is used to connect the drill rod. The lifting cylinder assembly includes at least two lifting cylinders. The lower end of the lifting cylinder is connected to a pad. The upper and lower parts of the lifting cylinder are fixed with the hydraulic nitrogen hammer assembly. The working end of the hydraulic nitrogen hammer assembly corresponds to the fixed outer ring A or the fixed outer ring B respectively, and is used to strike the fixed outer ring. The hydraulic nitrogen hammer assembly includes a first set of hydraulic nitrogen hammers and a second set of hydraulic nitrogen hammers. The first set of hydraulic nitrogen hammers is fixed to the upper part of the lifting cylinder with its working end facing downwards and corresponding to the outer ring A. The second set of hydraulic nitrogen hammers is fixed to the lower part of the lifting cylinder with its working end facing upwards and corresponding to the outer ring B. The first set of hydraulic nitrogen hammers includes hydraulic nitrogen hammer A and hydraulic nitrogen hammer B, and the second set of hydraulic nitrogen hammers includes hydraulic nitrogen hammer C and hydraulic nitrogen hammer D. A mud tap is used to connect to the upper end of the drill pipe to inject mud into the drill pipe; While the lifting cylinder assembly pulls the chuck upwards, the hydraulic nitrogen hammer assembly strikes the fixed outer ring, subjecting the drill rod to lifting and vibration forces. Mud is then injected into the drill rod through the grouting faucet, and the mud rises from the bottom of the drill rod along the outer wall, flushing the stuck point.

[0005] Furthermore, the upper end of the connecting pipe A is provided with an internal thread, and the lower end is provided with an external thread; the connecting pipe B is provided with an internal thread; the connecting pipe A and the connecting pipe B are connected by threads.

[0006] Furthermore, the lifting cylinder assembly includes four lifting cylinders, namely lifting cylinder A, lifting cylinder B, lifting cylinder C and lifting cylinder D, which are symmetrically arranged around the card holder.

[0007] Furthermore, the lower end of the lifting cylinder is connected to the padding material via hinges, the hinges including hinge A, hinge B, hinge C and hinge D.

[0008] Furthermore, it also includes a straightening link assembly, through which the hydraulic nitrogen hammer is fixed to the lifting cylinder.

[0009] Furthermore, the card holder is equipped with a bubble level for observing the horizontal state of the equipment.

[0010] This invention utilizes a hydraulic nitrogen hammer to generate vibration while a hydraulic cylinder pulls upward, thus placing the drill rod in a state of simultaneous upward pulling and vertical vibration. After multiple vibrations, the drill rod wall loosens with the surrounding soil or rock, reducing the friction between the pipe wall and the soil or rock, reducing the power required to pull the pipe, and also reducing the chance of equipment damage, thus achieving the goal of safe production. Attached Figure Description

[0011] Figure 1 This is the front view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is the left view of the present invention; Figure 4 This is a BB cross-sectional view of the present invention.

[0012] In the diagram: 1. Hinge A; 2. Card holder; 3. Lifting cylinder A; 4. Straightening link group A; 5. Hydraulic nitrogen hammer A; 6. Hydraulic nitrogen hammer B; 7. Straightening link group B; 8. Lifting cylinder B; 9. Hydraulic nitrogen hammer D; 10. Hinge B; 11. Pad; 12. Hinge C; 13. Bubble level A; 14. Hydraulic nitrogen hammer C; 15. Bubble level C; 16. Bubble level D; 17. Lifting cylinder C; 18. Lifting cylinder D; 19. Bubble level B; 20. Hinge D; 21. Drill rod; 22. Fixed outer ring A; 23. Fixed outer ring B; 24. Mud tap; 25. Threaded connection structure. Detailed Implementation

[0013] To better understand the purpose, structure, and function of this invention, a drill rod extraction machine of this invention will be described in further detail below with reference to the accompanying drawings. In the description, "upper," "lower," "left," and "right" are used in accordance with the accompanying drawings.

[0014] Example 1: Refer to Figures 1 to 4 The drill rod pulling machine includes a chuck 2, lifting cylinder A3, lifting cylinder B8, lifting cylinder C17, lifting cylinder D18, nitrogen hammer A5, nitrogen hammer B6, hydraulic nitrogen hammer C14, hydraulic nitrogen hammer D9, straightening link group A 4, straightening link group B 7, fixed outer ring A22, fixed outer ring B23, and padding material 11.

[0015] The fixed outer ring A22 is disc-shaped, with a connecting pipe A extending upwards and downwards through the center. The upper end of the connecting pipe has an internal thread, and the lower end of the connecting pipe A has an external thread. The fixed outer ring B23 is disc-shaped, with a connecting pipe B extending downwards through the center. The connecting pipe B has an internal thread. A mounting hole is located in the center of the clamping seat. The fixed outer ring B23 is positioned on the lower side of the clamping seat 2, with the connecting pipe B facing the mounting hole. The fixed outer ring A22 is positioned on the upper side of the clamping seat 2. The lower end of the connecting pipe A passes through the mounting hole and is threadedly connected to the upper end of the connecting pipe B, tightening the clamping seat. The lower end of the connecting pipe B is threadedly connected to the upper end of the drill rod. The upper end of the connecting pipe A is connected to the drill rod. During operation, mud is injected into the upper end of the drill rod through a mud slurry tap. The connecting pipes A and B together are referred to as the threaded connection structure 25.

[0016] Lifting cylinders A3, B8, C17, and D18 are symmetrically arranged in four directions on the mounting base 2. The lower ends of lifting cylinders A3, B8, C17, and D18 are connected to the construction site pad 11 via hinges A1, B10, C12, and D20. The pad 11 is generally a platform plate.

[0017] Hydraulic nitrogen hammer A5 is fixed to the upper part of lifting cylinder A3 via straightening link A group 4, and hydraulic nitrogen hammer B6 is fixed to the upper part of lifting cylinder B8 via straightening link B group 7. The lower ends of hydraulic nitrogen hammer A5 and hydraulic nitrogen hammer B6 face the fixed outer ring A22 disc. During operation, hydraulic nitrogen hammer A5 and hydraulic nitrogen hammer B6 move up and down with lifting cylinder A3 and lifting cylinder B8, and hydraulic nitrogen hammer A5 and hydraulic nitrogen hammer B6 strike the fixed outer ring A22 disc downwards, transmitting the vibration to the drill pipe through the chuck. Hydraulic nitrogen hammer C14 is fixed to the lower part of lifting cylinder A3 via straightening link group A4, and hydraulic nitrogen hammer D9 is fixed to the lower part of lifting cylinder B8 via straightening link group B7. The upper ends of hydraulic nitrogen hammer C14 and hydraulic nitrogen hammer D9 face the fixed outer ring B23 disc. During operation, hydraulic nitrogen hammer C14 and hydraulic nitrogen hammer D9 move up and down with lifting cylinder A3 and lifting cylinder B8, and hydraulic nitrogen hammer C14 and hydraulic nitrogen hammer D9 strike the fixed outer ring B23 disc upwards, transmitting the vibration to the drill pipe through the chuck.

[0018] Hydraulic nitrogen hammers, commonly known as rock hammers or breakers, have a lifting force that depends on the weight of the drill rod at the jammed point from the ground surface. The lifting force of the hydraulic cylinder is between two and twenty times the weight of that section of drill rod. Lifting cylinders A3, B8, C17, and D18 are connected to a central control display screen. The lifting tonnage is adjusted and displayed on the screen according to the site conditions. Combined with the hammer's force, the lifting force should generally not exceed the limits of the drill rod on site. If there are multiple jammed points, the lifting force depends on the weight of the lowest jammed point from the ground surface.

[0019] During operation, when the drill rod gets stuck underground, lifting cylinders D18, A3, B8, C17, and D18 pull the drill rod upwards, putting it in a tensioned and pulled state. Hydraulic nitrogen hammers D9 and C14 strike the lower surface of the chuck 2 at set time intervals, thus putting the drill rod in a state of simultaneous upward pulling and vertical vibration. Simultaneously, a grouting tap connected to the middle of the drill rod injects mud into the drill rod. The mud rises from the bottom of the drill rod along its outer wall, flushing the stuck point. Under the tension, repeated vibration, and mud flushing, the stuck point between the drill rod wall and the surrounding soil or rock loosens, releasing the blockage. This method reduces the friction between the pipe wall and the soil or rock, reduces the power required for pipe pulling, and also reduces the chance of equipment damage, achieving the goal of safe production. The set time intervals for hydraulic nitrogen hammers D9 and C14 are determined based on the drill pipe depth and the difficulty of extraction. As the drill pipe depth increases and the extraction difficulty increases, the hydraulic nitrogen hammer force is increased, and the time interval is lengthened. The hammering force and time interval of the hydraulic nitrogen hammer are adaptively adjusted in actual construction according to variables such as the specific diameter, wall thickness, burial depth, and geological conditions of the drill pipe.

[0020] In practical applications, if a drill rod breaks, a retrieval spear needs to be inserted. The spear is inserted into the drill rod, and its upper end is threaded onto a thickened drill rod. The upper end of the thickened drill rod is inserted between slips A20 and B21 and tightened. Then, using the same method described above, lifting cylinders A3, B8, C17, and D18 are used to pull the drill rod upwards, putting it in a tensioned and pulled state. Hydraulic nitrogen hammers D9 and C14 strike the lower surface of the chuck 2 at set time intervals. Simultaneously, a grouting pump is connected to the middle of the drill rod, injecting mud into it. Under the tension, repeated vibration, and mud flushing, the jamming point between the drill rod wall and the surrounding soil or rock loosens, allowing the lower part of the drill rod to be pulled out. Depending on the site conditions, a thickened reverse-threaded drill rod can also be connected.

[0021] The lower ends of lifting cylinders A3, B8, C17, and D18 are non-rigidly connected to padding 11 via hinges A1, B10, C12, and D20; they act as a buffer during vibration, increase the vibration effect, and reduce the power required for pipe pulling.

[0022] A bubble level C15 for the front-to-back direction and a bubble level D16 for the left-to-right direction are installed on the top of the mounting base 2; a bubble level A13 is installed in front of the mounting base 2; and a bubble level B19 is installed on the left side of the mounting base 2. During construction, the vertical and horizontal status of the equipment can be observed through these levels and adjustments can be made at any time to reduce the power required for pipe pulling and to keep the equipment in a safe operating state, thereby reducing the occurrence of accidents.

[0023] When encountering stubborn jamming points and necessitating reverse threading, the hydraulic cylinder and hammer maintain their usual operating state. Combined with existing pipe-tightening equipment on the machine, such as a pipe tightening machine, pipe wrench, or drill rod clamp, the drill rod continues to rotate. Lubricating oil is applied to the contact points between the upper part of the clamp and the fixed outer rings A22 and A23. The hydraulic cylinder pulls appropriately according to the on-site force, preventing the weight of the drill rod from pressing on the screw threads and reducing the frictional force of the tightening. The liquid nitrogen hammer strikes the discs of the fixed outer rings A22 and A23, transferring the reverse threading force to the jammed drill rod connection screw, causing the drill rod to loosen. The simultaneous operation of rotation, lifting, hammering, and mud pump flushing significantly improves the previously difficult problem of stuck drills.

[0024] When there is space at the bottom of the drill pipe and the equipment does not require hydraulic cylinder lifting, hydraulic nitrogen hammers A5 and B6 strike the fixed outer ring A22 disc downwards. Under the vibration of downward impact, the mud from the synchronous mud pump washes the stuck mud upwards. Strike for a while according to site requirements. Even if it is not completely unstuck, adjust to the upward striking mode described above and repeat the striking to flush away the sand until it is unstuck.

[0025] In practical applications, if a drill rod breaks, a retractable retrieval spear needs to be inserted. This spear is inserted into the drill rod, and its upper end is threaded onto a thickened reverse-thread drill rod. The upper end of the thickened reverse-thread drill rod is connected to a fixing outer ring A23. Using the same method described above, lifting cylinders A3, B8, C17, and D18 pull the drill rod upwards, putting it in a tensioned and pulled state. Hydraulic nitrogen hammers D9 and C14 strike the lower surface of the chuck 2 at set time intervals. Simultaneously, a mud tap 24 is connected to the middle of the drill rod, injecting mud into it. Under the tension, repeated vibration, and mud flushing, the jamming point between the drill rod wall and the surrounding soil or rock loosens, allowing the lower part of the drill rod to be pulled out. If necessary, a thickened reverse-thread drill rod is used for reverse threading.

[0026] In summary, during use, lifting cylinders A3, B8, C17, and D18 pull upwards, while hydraulic nitrogen hammers A5 and B6 strike downwards the fixed outer ring A22 disc, and hydraulic nitrogen hammers C14 and D9 strike upwards the fixed outer ring B23 disc. The striking of the mounting bracket from above and from below are performed alternately.

[0027] This patented equipment can be adjusted on-site according to various conditions, terrain elevation, and the thickness, length, and shape of various wells, piles, and drill rods. The details of the replacement may vary and cannot be shown here.

[0028] The above-disclosed embodiments of the present invention are merely for illustrating the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention; they should not be limited to specific implementation methods.

Claims

1. A drill rod extraction machine, characterized in that, Includes a card holder (2), a fixed outer ring A (22), a fixed outer ring B (23), a lifting cylinder assembly, a hydraulic nitrogen hammer assembly, a mud faucet (24), and a pad (11); The fixed outer ring A (22) is provided with a connecting pipe A extending upward and downward in the middle of the through-disk, the fixed outer ring B (23) is provided with a connecting pipe B extending downward in the middle of the through-disk, the card seat (2) is provided with an installation hole in the middle, the connecting pipe A passes through the installation hole and connects with the connecting pipe B and clamps the card seat (2), and the lower end of the connecting pipe B is used to connect the drill rod; The lifting cylinder assembly includes at least two lifting cylinders. The lower end of the lifting cylinder is connected to the pad (11). The upper and lower parts of the lifting cylinder are fixed with the hydraulic nitrogen hammer assembly. The working end of the hydraulic nitrogen hammer assembly corresponds to the fixed outer ring A (22) or the fixed outer ring B (23) respectively, and is used to strike the fixed outer ring. The hydraulic nitrogen hammer assembly includes a first set of hydraulic nitrogen hammers and a second set of hydraulic nitrogen hammers. The first set of hydraulic nitrogen hammers is fixed to the upper part of the lifting cylinder with its working end facing downwards and corresponding to the outer ring A (22). The second set of hydraulic nitrogen hammers is fixed to the lower part of the lifting cylinder with its working end facing upwards and corresponding to the outer ring B (23). The first set of hydraulic nitrogen hammers includes hydraulic nitrogen hammer A (5) and hydraulic nitrogen hammer B (6). The second set of hydraulic nitrogen hammers includes hydraulic nitrogen hammer C (14) and hydraulic nitrogen hammer D (9). The mud tap (24) is used to connect to the upper end of the drill pipe to inject mud into the drill pipe; While the lifting cylinder assembly pulls the mounting bracket (2) upward, the hydraulic nitrogen hammer assembly strikes the fixed outer ring, causing the drill rod to be subjected to lifting force and vibration force. Mud is injected into the drill rod through the grouting faucet (24), and the mud flows upward from the bottom of the drill rod along the outer wall of the drill rod to flush the stuck position.

2. The drill rod extraction machine according to claim 1, characterized in that, The upper end of the connecting pipe A is provided with an internal thread, and the lower end is provided with an external thread; the connecting pipe B is provided with an internal thread; the connecting pipe A and the connecting pipe B are connected by threads.

3. The drill rod extraction machine according to claim 2, characterized in that, The lifting cylinder assembly includes four lifting cylinders, namely lifting cylinder A (3), lifting cylinder B (8), lifting cylinder C (17) and lifting cylinder D (18), which are symmetrically arranged around the card holder (2).

4. The drill rod extraction machine according to claim 3, characterized in that, The lower end of the lifting cylinder is connected to the pad (11) by a hinge, which includes hinge A (1), hinge B (10), hinge C (12) and hinge D (20).

5. The drill rod extraction machine according to claim 4, characterized in that, It also includes a straightening link assembly, through which the hydraulic nitrogen hammer is fixed to the lifting cylinder.

6. The drill rod extraction machine according to claim 5, characterized in that, The card holder (2) is equipped with a bubble level for observing the horizontal status of the equipment.

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