Iron roughneck three-ram pipe clamping string device

Abstract

The present application relates to a kind of iron drill worker three oil cylinder clamping pipe column device, including upper cover plate, six oil cylinder shaft sleeve, three jaw oil cylinders, lower bottom plate, jaw seat I, three pieces of jaw, two pieces of jaw seat II;It is characterized by: three jaw oil cylinders are respectively installed between upper cover plate and lower bottom plate by six oil cylinder shaft sleeves, jaw seat I is installed on the piston rod end of the jaw oil cylinder in middle position, two pieces of jaw seat II are respectively installed on the piston rod end of other two jaw oil cylinders, and one piece of jaw is respectively installed on jaw seat I and two pieces of jaw seat II.The present application is used, three jaw oil cylinders are floatingly installed between upper cover plate and lower bottom plate, jaw seat I is connected with the piston rod end of one jaw oil cylinder in middle position, two pieces of jaw seat II are respectively connected with the piston rod end of other two jaw oil cylinders, movement of jaw seat I, jaw seat II is driven by the synchronous reciprocating motion of three jaw oil cylinders, so as to realize the clamping and opening of pipe column.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of petroleum machinery equipment, in particular to a three-oil-cylinder pipe column clamping device for iron roughneck. BACKGROUND

[0002] Iron roughneck is a tool used for connecting and disassembling pipe columns such as drill pipe, drill collar, oil pipe, casing, and casing milling barrel in oilfield drilling and workover operations. In the existing working process of iron roughneck, a double-V-shaped clamp is generally used to clamp the pipe column with the iron roughneck clamping device, and the pipe column is deformed and damaged due to partial clamping. The clamp teeth are often broken, and the clamping device cannot adapt to the clamping of oil pipes and casings. It is relatively difficult to solve these problems due to the use habit, cost, and other reasons in the oilfield site.

[0003] In summary, in order to adapt to the use of iron roughneck in oilfield drilling and workover operations, a new iron roughneck clamp pipe column device must be used. SUMMARY

[0004] The purpose of the present application is to provide a three-oil-cylinder pipe column clamping device for iron roughneck that can adapt to various pipe columns and overcome the shortcomings of the background art.

[0005] A three-oil-cylinder pipe column clamping device for iron roughneck includes an upper cover plate, six oil cylinder shaft sleeves, three clamp oil cylinders, a lower base plate, a clamp tooth seat I, three clamp teeth, and two clamp tooth seats II. The three clamp oil cylinders are installed between the upper cover plate and the lower base plate through the six oil cylinder shaft sleeves. The clamp tooth seat I is installed on the end of the piston rod of the middle clamp oil cylinder. The two clamp tooth seats II are installed on the ends of the piston rods of the other two clamp oil cylinders. One clamp tooth is installed on each of the clamp tooth seat I and the two clamp tooth seats II.

[0006] The present application further includes two supports, two pins I, and two connecting rods. The two supports are installed between the upper cover plate and the lower base plate to separate the three clamp oil cylinders. Each of the two connecting rods is connected and fixed to one of the two supports through one of the pins I and can rotate around the pin I.

[0007] The present application further includes two pin shaft stop pieces, one of which is installed on each of the two supports to limit the axial displacement and rotation of the pin I.

[0008] The present application further includes two guards, one of which is installed on each of the two sides of the upper cover plate and the lower base plate at the clamp.

[0009] The upper cover plate and the lower base plate are partially designed as grooves to reduce the size of the clamping device in the height direction and better adapt to the needs of the iron roughneck.

[0010] The three jaw oil cylinders are uniformly arranged at 120 degrees. The three jaw oil cylinders are uniformly arranged at 120 degrees for clamping, the pipe string is automatically centered during clamping, the damage of shearing force to the pipe string is cancelled, the bite mark is shallow, and the service life of the jaw is greatly prolonged.

[0011] The jaw adopts dovetail grooves and bolts for fixing and limiting, and can be quickly disassembled.

[0012] When the present application is used, the three jaw oil cylinders are floatingly installed between the upper cover plate and the lower bottom plate, the jaw seat I is connected with the piston rod end of one oil cylinder at the middle position and is limited by the support, the two jaw seats II are respectively connected with the piston rod ends of the other two oil cylinders and are connected to the support through connecting rods, the jaw seat I is driven to move linearly and the jaw seat II is driven to move in an arc through the synchronous reciprocating movement of the three jaw oil cylinders, so that the pipe string is clamped and opened.

[0013] The present application can adapt to the clamping of the pipe string with an outer diameter of 73mm-260mm without replacing the jaw seat and the jaw.

[0014] The present application adopts the mode that the piston rod of the jaw oil cylinder is extended for clamping, can well adapt to the small clamping force required by the oil pipe and the casing, can clamp the oil pipe and the casing and does not deform or damage the oil pipe and the casing.

[0015] The jaw oil cylinder adopts a floating installation mode, and can automatically compensate the axial displacement of the clamping device during the connection of the pipe string.

[0016] The piston rod end of the jaw oil cylinder is connected and limited by the support and the connecting rod, so that the jaw oil cylinder can withstand a large torque of 220KN·M during the connection of the pipe string.

[0017] The device can automatically center the pipe string with different diameters when clamping the pipe string with different diameters. DETAILED DESCRIPTION

[0018] Figure 1 is a structural schematic diagram of the present application.

[0019] Figure 2 is an explosion schematic diagram of the present application.

[0020] Figure 3 is an explosion schematic diagram of the installation of the jaw seat I of the present application.

[0021] Figure 4 is an explosion schematic diagram of the installation of the jaw seat II of the present application. DETAILED DESCRIPTION

[0022] The present application will be described in detail below with reference to the accompanying drawings.

[0023] As Figure 1 , Figure 2、 Figure 3 、 Figure 4 As shown in the drawings, the present application comprises an upper cover plate 1, six oil cylinder sleeves 2, two supports 3, three jaw oil cylinders 4, two protective plates 5, a lower bottom plate 6, two pins I 7, twenty-four bolts I 8, twenty-four wedge washers I 9, positioning bolts I 10, wedge washers II 11, four bolts II 12, four wedge washers III 13, four wear-resistant blocks 14, a jaw seat I 15, six bolts III 16, six wedge washers IV 17, three jaws 18, two shaft shoulder retaining rings 19, two pins II 20, four wear-resistant sleeves 21, two bolts IV 22, two jaw seats II 23, two connecting rods 24, and two pin shaft retaining pieces 25. The two supports 3 are connected to the upper cover plate 1 and the lower bottom plate 6 through the twenty-four bolts I 8 and the twenty-four wedge washers I 9. The three jaw oil cylinders 4 are evenly arranged at an interval of 120 degrees between the upper cover plate 1 and the lower bottom plate 6 and are separated by the two supports 3. The trunnion end of each jaw oil cylinder 4 is connected to the upper cover plate 1 and the lower bottom plate 6 through the two oil cylinder sleeves 2. The two protective plates 5 are installed at the jaw positions on the two sides of the upper cover plate 1 and the lower bottom plate 6. The jaw seat I 15 is connected to the piston rod end of one of the jaw oil cylinders 4 through the positioning bolts I 10, the wedge washers II 11, and the intermediate position, and is in contact with and limited by the upper cover plate 1 and the lower bottom plate 6 through the four bolts II 12, the four wedge washers III 13, and the four wear-resistant blocks 14. The two jaw seats II 23 are connected to the piston rod ends of the other two jaw oil cylinders 4 through one bolt IV 22 each. Each jaw seat II 23 is connected and fixed to one connecting rod 24 through the two shaft shoulder retaining rings 19, one pin II 20, and two wear-resistant sleeves 21. The other end of each connecting rod 24 is connected to one support 3 through one pin I 7 and can rotate around the pin I 7. One pin shaft retaining piece 25 is installed on each support 3, and the pin shaft retaining piece 25 is used to limit the axial displacement and rotation of the pin I 7. One jaw 18 is installed on the jaw seat I 15 and the two jaw seats II 23. Each jaw 18 is limited by the two bolts III 16 and the two wedge washers IV 17. The jaw 18 is fixed and limited by dovetail grooves and bolts, and can be quickly disassembled.

[0024] The upper cover plate 1 and the lower bottom plate 6 adopt a local groove design, which can reduce the size of the height direction of the entire clamping device and better adapt to the needs of the iron roughneck.

[0025] The present application adopts thread and shaft connections, which is easy to assemble. When repairing later, only the damaged parts need to be replaced, without replacing the entire clamping device.

[0026] As Figure 2 、 Figure 3 、 Figure 4As shown, the three jaw cylinder is floatingly installed between the upper cover plate and the lower bottom plate, the jaw seat I 15 is connected with the piston rod of one jaw cylinder 4 at the middle position and is limited by the support 3, the two jaw seat II 23 are respectively connected with the piston rod of the other two jaw cylinder 4 and are connected to the support 3 through the connecting rod 24, the reciprocating movement of the one jaw cylinder 4 at the middle position drives the linear movement of the jaw seat I 15, the synchronous reciprocating movement of the other two jaw cylinder 4 drives the circular arc movement of the jaw seat II 23, so that the clamping and opening of the pipe column is realized, and the problems of the background art, such as the eccentric clamping, the deformation and damage of the pipe column, the frequent collapse of the jaw, and the difficulty in clamping the oil pipe and the casing, are solved.

Claims

1. An iron roughneck three oil cylinder clamping pipe string device, comprising an upper cover plate (1), six oil cylinder shaft sleeves (2), three jaw oil cylinders (4), a lower bottom plate (6), a jaw seat I (15), three pieces of jaw teeth (18), two pieces of jaw seat II (23), two pieces of supports (3), two pins I (7), and two pieces of connecting rods (24), characterized in that : Three jaw cylinder (4) through six oil cylinder shaft sleeve (2) are installed between the upper cover plate (1) and the lower bottom plate (6), respectively, the jaw seat I (15) is installed on the piston rod end of the middle position jaw cylinder (4), two pieces of jaw seat II (23) are respectively installed on the piston rod end of the other two jaw cylinder (4), the jaw seat I (15) and two pieces of jaw seat II (23) are respectively installed on a piece of jaw (18); Two pieces of bracket (3) are installed between the upper cover plate (1) and the lower bottom plate (6), which separate the three jaw cylinder (4); each jaw seat II (23) is respectively connected with a connecting rod (24), and the other end of each connecting rod (24) is connected with a bracket (3) through a pin I (7) and can rotate around the pin I (7); The three jaw cylinder (4) are uniformly arranged at an angle of 120 degrees, one of the middle position jaw cylinder (4) reciprocating drives the jaw seat I (15) linear motion, and the other two jaw cylinder (4) synchronous reciprocating drives the jaw seat II (23) circular motion.

2. The Iron Roughneck three-ram clamp pipe string device of claim 1, wherein It also includes two pieces of pin shaft baffle (25), one piece of pin shaft baffle (25) is installed on each bracket (3), which is used to limit the axial displacement and rotation of the pin I (7).

3. The Iron Roughneck three-ram clamp pipe string device of claim 1, wherein It also includes two pieces of guard plate (5), two pieces of guard plate (5) are respectively installed on the jaw of the upper cover plate (1) and the lower bottom plate (6) two sides.

4. The Iron Roughneck three-ram clamp pipe string device of claim 1, wherein The upper cover plate (1) and the lower bottom plate (6) are designed as a groove.

5. The Iron Roughneck three-ram clamp pipe string device of claim 1, wherein The jaw uses dovetail groove and bolt to fix and limit.

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