A novel power tong centralizer

Abstract

The application discloses a novel power tong centralizing device, and relates to the technical field of oil drilling and workover equipment, which comprises a liquid cylinder, a right centralizing arm driven to rotate by the liquid cylinder, a left blocking arm meshed with a gear at one end of the right centralizing arm, a left centralizing arm driven to rotate outward by the left blocking arm, and a screw and nut assembly used for abutting and cooperating with the left centralizing arm, wherein the screw and nut assembly is installed on the left blocking arm in a penetrating mode, rollers are installed on the inner sides of the left centralizing arm and the right centralizing arm and are combined to form a centralizing cavity, and a tension spring is further connected between the left centralizing arm and the right centralizing arm. The application is applicable to pipe strings with different diameters, the rollers are arranged in the application, the rollers have a full-range centralizing effect on the pipe string, the pipe string is effectively protected, and the collision or abrasion of the pipe string is avoided, so that the overall operation safety and reliability are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil drilling and workover equipment, in particular to a novel power tong centralizing device. BACKGROUND

[0002] In drilling or workover operations, power tongs are a key oil drilling and production tool used to make up or break out pipe strings such as drill pipes, casings and tubing. Generally, the length of a pipe string is close to ten meters, and some drilling platforms lower two or three pipe strings together, with a length of even two or three tens of meters. As a result, the pipe string will sway greatly due to the influence of wind and other factors, and since the tong opening of the power tong, especially the commonly used open-type power tong, is generally much larger than the pipe string, the large sway will impact the power tong, causing damage to the pipe string and equipment, and in severe cases, even causing personal injury to the operator.

[0003] Therefore, the pipe string needs to be centered during power tong operation to prevent large sway of the pipe string. Traditional power tong centering devices mostly require more than one hydraulic cylinder, resulting in complex piping and seriously affecting operation efficiency.

[0004] Related research on power tong centering devices in the prior art, such as patent application CN 205778626 U hydraulic centering device for power tong, can achieve single hydraulic cylinder operation to center the pipe string, simplify the piping to improve operation efficiency, and restrict the pipe string to the center of the power tong tong opening to prevent large sway. However, after the pipe string is clamped by the prior art, the inner hole of the centering arm is often a constant circular hole. If the pipe string is used with a variable diameter, it cannot fully embrace the pipe string, and cannot ensure that the centering needs of pipe strings of different diameters are met. At the same time, the inner hole of the centering arm of the prior art is mostly dry friction with the pipe string, and there is still a risk of pipe string collision or wear, and the final operation safety and reliability are generally poor.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. SUMMARY

[0006] The present application aims to provide a novel power tong centering device to solve the technical problems that the prior art cannot ensure that it is applicable to pipe strings of different diameters, and the inner hole of the centering arm of the prior art is mostly dry friction with the pipe string, and there is still a risk of pipe string collision or wear, and the final operation safety and reliability are generally poor.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] The novel power tongs righting device comprises a liquid cylinder, a right righting arm rotating in and out driven by the liquid cylinder, a left blocking arm meshing with a gear at one end of the right righting arm, a left righting arm rotating out driven by the left blocking arm, and a screw nut assembly for abutting with the left righting arm, a tension spring is connected between the left righting arm and the right righting arm, the two ends of the tension spring are respectively connected with a tension spring screw I and a tension spring screw II between the left righting arm and the right righting arm, the screw nut assembly is installed on the left blocking arm in a penetrating mode, the inner sides of the left righting arm and the right righting arm are respectively installed with rotatable rollers and form a righting cavity through the roller combination, a signal sensor cooperating with the righting cavity is further installed on the left righting arm, the rollers are provided with three roller pins penetrating through the rollers coaxially, one of the rollers is installed on the inner side of the left righting arm through the roller pin, and the other two rollers are distributed in a V shape on the inner side of the right righting arm through the roller pins, C-shaped grooves are formed on the inner sides of the left righting arm and the right righting arm in a one-to-one correspondence for accommodating the rollers and inserting the roller pins;

[0009] Further, the screw nut assembly comprises an adjusting screw abutting with the outer side of the middle part of the left righting arm and an adjusting nut for locking the adjusting screw, the adjusting screw penetrates through the left blocking arm and is threadedly connected with the left blocking arm, the right righting arm has an open inward L-shaped structure, the left blocking arm has an open outward L-shaped structure, the left blocking arm and the right righting arm are provided with a base below and one end of the left blocking arm and one end of the right righting arm are hingedly connected to the base, the end of the right righting arm hingedly connected to the base is formed with a gear I, the end of the left blocking arm hingedly connected to the base is formed with a gear II meshing with the gear I, the liquid cylinder is provided with a liquid cylinder base cooperating with the liquid cylinder, the cylinder body of the liquid cylinder is hingedly connected to the liquid cylinder base, the end of the piston rod of the liquid cylinder is hingedly connected to the middle part of the right righting arm, the device further comprises a support frame, the support frame is installed on the side of the suspension rod of the power tongs, the base and the liquid cylinder base are installed on the support frame, the left righting arm has an open inward L-shaped structure and is arranged opposite to the right righting arm, one end of the left righting arm is coaxially hingedly connected above one end of the left blocking arm hingedly connected to the base and the end of the left righting arm is provided with an arc-shaped hole with the hinge as the center, and the top of the left blocking arm is provided with a pin shaft slidingly cooperating with the arc-shaped hole.

[0010] Further, the base and the right righting arm are penetrated by a right connecting pin, the base, the left blocking arm and the left righting arm are penetrated by a left connecting pin, the end of the piston rod of the liquid cylinder and the middle part of the right righting arm are connected by a liquid cylinder pin I, and the cylinder body of the liquid cylinder and the liquid cylinder base are connected by a liquid cylinder pin II.

[0011] Compared with the prior art, the device has the following beneficial effects:

[0012] 1. The present application is only provided with one liquid cylinder, and realizes single liquid cylinder operation. Through the cooperation of the liquid cylinder, the right centralizing arm, the left blocking arm, the left centralizing arm, the screw nut assembly and the tension spring, the relative closing or opening of the left centralizing arm under the action of the right centralizing arm, the left blocking arm and the screw nut assembly is realized safely and stably, and the operation adjustment according to the pipe diameter of the pipe column is realized, so that the pipe column with different diameters is considered. On this basis, the inner side of the left centralizing arm and the right centralizing arm is provided with a rotatable roller, and a centralizing cavity is formed by the roller group. The setting of the roller can realize the all-round centralizing effect of the pipe column, and avoid the direct contact between the pipe column and the left centralizing arm and the right centralizing arm, effectively protect the pipe column, avoid the collision or wear of the pipe column, and finally greatly improve the overall operation safety and reliability. In addition, the adjustable structure characteristics of the screw nut assembly can be used to adjust the angle position of the left centralizing arm, so as to determine the center position of the pipe column, so as to further meet the operation requirements of the pipe column with different diameters, and improve the operation safety and reliability;

[0013] 2. In the present application, the right centralizing arm is driven to rotate inward and outward by the liquid cylinder, and the left blocking arm is meshed with the right centralizing arm. The relative closing or opening of the left blocking arm and the right centralizing arm is realized, that is, the piston rod of the liquid cylinder is extended, the right centralizing arm is rotated inward, the left blocking arm is rotated inward under the meshing of the gear, the piston rod of the liquid cylinder is retracted, the right centralizing arm is rotated outward, the left blocking arm is rotated outward under the meshing of the gear. On this basis, the left centralizing arm driven outward by the left blocking arm, the screw nut assembly installed on the left blocking arm and used for abutting cooperation with the left centralizing arm, and the tension spring connected between the left centralizing arm and the right centralizing arm are used for cooperation. The relative closing or opening of the left centralizing arm and the right centralizing arm is realized, that is, when the left blocking arm rotates outward, the left centralizing arm is rotated outward, the tension spring is tightened between the left centralizing arm and the right centralizing arm, the left centralizing arm is in a tense state, and the pipe column can be safely avoided. When the left blocking arm rotates inward, the screw nut assembly on the left blocking arm pushes against the left centralizing arm and blocks the opening of the left centralizing arm, so that the operation safety and reliability are further improved;

[0014] 3. In the present application, the signal sensor matched with the centralizing cavity is installed on the left centralizing arm. When the roller clamps the pipe column, the signal sensor is in close contact with the pipe column, and signal feedback can be realized. The signal feedback can be a close signal, or the diameter or length of the pipe column can be measured, so that the automation of the device is further realized, and the overall operation safety and reliability is ensured;

[0015] 4. The three rollers are provided in the invention, one of which is installed on the inner side of the left centralizing arm, and the other two are V-shapedly distributed on the inner side of the right centralizing arm, and the three rollers are distributed in a triangular manner, which can prevent the pipe column from shaking in any direction, especially in the opening direction of the power tong, and finally further ensure the overall operation safety and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the isometric view of the invention (without support frame);

[0017] Figure 2 is the top view of the closed state of the invention (without support frame);

[0018] Figure 3 is the top view of the half-open state of the invention (without support frame);

[0019] Figure 4 is the top view of the fully open state of the invention (without support frame);

[0020] Figure 5 is the working principle diagram of the signal sensor of the invention;

[0021] Figure 6 is the working principle diagram of the screw nut assembly of the invention;

[0022] Figure 7 is the working principle diagram of the invention;

[0023] In the figure: 1, base, 2, cylinder base, 3, cylinder, 31, cylinder pin I, 32, cylinder pin II, 4, right centralizing arm, 41, gear I, 5, left blocking arm, 51, gear II, 52, pin shaft, 6, left centralizing arm, 61, arc-shaped hole, 7, roller, 8, roller pin, 9, tension spring, 91, tension spring screw I, 92, tension spring screw II, 10, centralizing cavity, 11, right connecting pin, 12, left connecting pin, 13, adjusting screw, 14, adjusting nut, 15, C-shaped groove, 16, spring pin, 17, signal sensor, 18, support frame, 19, power tong, 20, suspension rod, 21, pipe column. DETAILED DESCRIPTION

[0024] The following examples are used to further illustrate the content of the invention and do not limit the application of the invention.

[0025] Please refer to Figures 1-7It shows a new type of power tong centralizer device, including base 1, liquid cylinder 3, right centralizing arm 4, left blocking arm 5, left centralizing arm 6, roller 7 and tension spring 9 (the existing power tong centralizer device has control mechanism and other basic structure, which is not described in detail, but should not be limited to its function), the lower part of base 1 is bolted with support frame 18 (correspondingly, the base 1 can be provided with threaded hole to fix itself on the support frame 18), the support frame 18 is installed on the suspension rod 20 of the power tong 19, the right connecting pin 11 is penetrated through the base 1 and the right centralizing arm 4, the right centralizing arm 4 is in the form of open inward L type structure and one end is hinged to the upper part of the base 1 through the right connecting pin 11, the end of the right centralizing arm 4 hinged to the base 1 is formed with gear I 41, the left connecting pin 12 is penetrated through the base 1 and the left blocking arm 5, the left blocking arm 5 is in the form of open outward L type structure and one end is hinged to the upper part of the base 1 through the left connecting pin 12, the end of the left blocking arm 5 hinged to the base 1 is formed with gear II 51 meshing with gear I 41, the support frame 18 is further bolted with liquid cylinder base 2 (correspondingly, the liquid cylinder base 2 can be provided with threaded hole to fix itself on the support frame 18), the cylinder body of the liquid cylinder 3 is connected with the liquid cylinder base 2 through liquid cylinder pin II 32 and the cylinder body of the liquid cylinder 3 is hinged to the upper part of the liquid cylinder base 2 through the liquid cylinder pin II 32, the piston rod end of the liquid cylinder 3 is connected with the middle part of the right centralizing arm 4 through liquid cylinder pin I 31 and the piston rod end of the liquid cylinder 3 is hinged to the middle part of the right centralizing arm 4 through the liquid cylinder pin I 31, the left centralizing arm 6 is in the form of open inward L type structure and is arranged opposite to the right centralizing arm 4, the left connecting pin 12 is penetrated through the left centralizing arm 6, one end of the left centralizing arm 6 is hinged to the upper part of the left blocking arm 5 through the left connecting pin 12 and the end of the left centralizing arm 6 is formed with arc-shaped hole 61 with the hinge as the center, the top of the left blocking arm 5 is correspondingly provided with pin shaft 52 slidingly matched with the arc-shaped hole 61, the tension spring 9 is arranged above the left centralizing arm 6 and the right centralizing arm 4 and the two ends of the tension spring 9 are respectively connected with the left centralizing arm 6 and the right centralizing arm 4 through tension spring screw I 91 and tension spring screw II 92 (correspondingly, the left centralizing arm 6 can be provided with threaded hole to fix the tension spring screw I 91 on itself, the right centralizing arm 4 can be provided with threaded hole to fix the tension spring screw II 92 on itself);

[0026] Further, the three rollers 7 are coaxially arranged through the rollers 7, the left centralizing arm 6 and the right centralizing arm 4 are combined to form a centralizing cavity 10, and the left centralizing arm 6 is provided with a signal sensor 17 matched with the centralizing cavity 10 (the functions and structures of the signal sensor and other conventional devices are known in the art, and the connection setting is also common sense, so no further description is made here, and the signal sensor is not shown in the drawings).

[0027] Further, the left blocking arm 5 is provided with an adjusting screw 13 arranged in a penetrating mode, the adjusting screw 13 is provided with an adjusting nut 14 for locking the adjusting screw 13, and the adjusting nut 14 abuts against the outer side of the middle part of the left centralizing arm 6.

[0028] The working principle and working process of the present application are as follows:

[0029] Closing: first, the position of the power clamp 19 is determined, then the left centralizing arm 6 and the right centralizing arm 4 are driven to close relative to each other by the hydraulic cylinder 3, and finally the three rollers 7 jointly clamp the pipe string 21 to realize the centralizing of the pipe string 21, specifically, the piston rod of the hydraulic cylinder 3 is extended to push the right centralizing arm 4 to rotate inward around the right connecting pin 11, under the meshing action of the gear I 41 and the gear II 51, the left blocking arm 5 is driven to rotate inward around the left connecting pin 12, when the left blocking arm 5 rotates inward, the adjusting screw 13 on the left blocking arm 5 abuts against the left centralizing arm 6 to block the opening of the left centralizing arm 6, at this time, if the pipe string 21 is in the centralizing cavity 10, the pipe string 21 can be smoothly clamped.

[0030] Opening: the piston rod of the hydraulic cylinder 3 is retracted to pull the right centralizing arm 4 to rotate outward around the right connecting pin 11, under the meshing action of the gear I 41 and the gear II 51, the left blocking arm 5 is driven to rotate outward around the left connecting pin 12, when the left blocking arm 5 rotates outward, the left centralizing arm 6 is driven to rotate outward around the left connecting pin 12 through the pin shaft 52 on the left blocking arm 5 and the arc-shaped hole 61 of the left centralizing arm 6, at this time, the tension spring 9 is tightened between the left centralizing arm 6 and the right centralizing arm 4, so that the left centralizing arm 6 is in a tight state and can avoid the pipe string 21.

[0031] In the above process, the pipe column 21 can move up and down along the roller 7, the roller 7 plays a role of righting the pipe column 21, can prevent the pipe column 21 from shaking in any direction, and can also avoid the pipe column 21 from colliding with the left righting arm 6 or the right righting arm 4 to wear; at the same time, the combination of the adjusting screw 13 and the adjusting nut 14 can realize the adjustment of the angle position of the left righting arm 6, so as to determine the center position of the pipe column 21.

[0032] In addition, the pin shaft 52 on the left blocking arm 5 only plays a role in the fully open state, that is, before closing, the left righting arm 6 is relatively free and can rotate around the left connecting pin 12.

Claims

1. A novel power tong centralizer device comprising a hydraulic cylinder, characterized in that, It also includes a right centralizing arm driven by a liquid cylinder to rotate inside and outside, a left blocking arm meshing with a gear at one end of the right centralizing arm, a left centralizing arm driven by the left blocking arm to rotate outward, and a screw nut assembly for abutting with the left centralizing arm, the screw nut assembly is installed on the left blocking arm in a through manner, the inner sides of the left centralizing arm and the right centralizing arm are both installed with rotatable rollers and form a centralizing cavity through the roller combination, and a tension spring is further connected between the left centralizing arm and the right centralizing arm. The right centralizing arm is in an open inward L-shaped structure, the left blocking arm is in an open outward L-shaped structure, the lower parts of the left blocking arm and the right centralizing arm are provided with a base, and one end of the left blocking arm and one end of the right centralizing arm are both hinged to the base, the end of the right centralizing arm hinged to the base is formed with a gear I, and the end of the left blocking arm hinged to the base is formed with a gear II meshing with the gear I. The left centralizing arm is in an open inward L-shaped structure and is arranged opposite to the right centralizing arm, one end of the left centralizing arm is coaxially hinged above one end of the left blocking arm hinged to the base, and the end of the left centralizing arm is provided with an arc-shaped hole with the hinge as the center, and the top of the left blocking arm is provided with a pin shaft slidingly matched with the arc-shaped hole.

2. A novel power tong centralizer device as claimed in claim 1, wherein, The liquid cylinder is provided with a liquid cylinder base matched with the liquid cylinder, the cylinder body of the liquid cylinder is hinged to the liquid cylinder base, and the end of the piston rod of the liquid cylinder is hinged to the middle part of the right centralizing arm.

3. A novel power tong centralizer device as defined in claim 2, wherein, The end of the piston rod of the liquid cylinder and the middle part of the right centralizing arm are connected with a liquid cylinder pin I, and the cylinder body of the liquid cylinder and the liquid cylinder base are connected with a liquid cylinder pin II.

4. A novel power tong centralizer device as defined in claim 2, wherein, The device further includes a support frame, the support frame is installed on the side of the suspension rod of the power tongs, and the base and the liquid cylinder base are both installed on the support frame.

5. A novel power tong centralizer device as defined in claim 1, wherein, The right connecting pin is penetrated through the base and the right centralizing arm, and the left connecting pin is penetrated through the base, the left blocking arm and the left centralizing arm.

6. A novel power tong centralizer device as defined in claim 1, wherein, The screw nut assembly includes an adjusting screw abutting with the middle part of the left centralizing arm, and an adjusting nut for locking the adjusting screw, the adjusting screw is penetrated through the left blocking arm and is threadedly connected with the left blocking arm.

7. A novel power tong centralizer device as defined in claim 1, wherein, The rollers are provided with three roller pins, one of the rollers is installed on the inner side of the left centralizing arm through the roller pin, the other two rollers are distributed in a V-shaped structure on the inner side of the right centralizing arm through the roller pins, and the inner sides of the left centralizing arm and the right centralizing arm are both provided with C-shaped grooves for accommodating the rollers and inserting the roller pins.

8. A new power tong centralizer device as defined in claim 1, wherein, The left centralizing arm is further provided with a signal sensor matched with the centralizing cavity, and the two ends of the tension spring are respectively connected with a tension spring screw I and a tension spring screw II between the left centralizing arm and the right centralizing arm.

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