Manufacturing method of radial TC bearing for petroleum drilling

Abstract

The invention relates to the technical field of bearing processing, and discloses a manufacturing method of a radial TC bearing for petroleum drilling, which comprises the following steps: step 1, processing a static ring structure according to a drawing construction standard; secondly, a ball roller hole is machined in the inner side of the annular groove of the static ring structure; thirdly, the lower ends of the ball roller holes are sealed, and then balls or rollers are placed in the ball roller holes; fourthly, after the balls or the rollers are put in, the upper ends of the ball and roller holes are sealed; fifthly, according to the drawing construction standard, a moving coil structure is machined; sixthly, the movable ring structure is sleeved with the static ring structure, and a TC bearing is formed through combination; sliding friction of the hard alloy friction surfaces of the static ring structure and the moving ring structure is changed into rolling friction, friction force of the friction working surfaces is reduced to the maximum extent, the service life of the TC bearing is prolonged to the maximum extent and is prolonged by more than 10 times compared with that of an existing TC bearing, steel for producing the TC bearing is saved, well drilling production efficiency is improved, and production cost is reduced. The production cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing processing, and more particularly to a method for manufacturing a radial TC bearing for oil drilling. Background Art

[0002] TC bearings are composed of a moving ring (small ring) and a stationary ring (large ring). The moving ring and the stationary ring are put together and start to work when they rotate. When working, the two hard alloy wear-resistant layers of the moving and stationary rings rotate and rub. This kind of friction belongs to sliding friction. Due to friction, the gap between the two hard alloy working friction surfaces of the moving and stationary rings becomes larger and larger than the standard required by production. This set of TC bearings is no longer used and should be replaced with new TC bearings.

[0003] The current production of TC bearings is insufficient; the key to the quality of TC bearings lies in the carbide layer, which is required to be as wear-resistant as possible and also resistant to impact. The wear-resistant layer is made of carbide, which is brittle and has poor impact resistance, and its wear resistance is far from meeting the production requirements. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a method for manufacturing a radial TC bearing for oil drilling.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for manufacturing a radial TC bearing for oil drilling, comprising the following steps:

[0006] Step 1: Process the static ring structure according to the construction standards of the drawings;

[0007] Step 2: Processing a ball roller hole on the inner side of the annular groove of the stationary ring structure;

[0008] Step 3: Seal the lower end of the ball and roller hole and put the ball or roller in;

[0009] Step 4: After the balls or rollers are placed in, seal the upper end of the ball and roller holes;

[0010] Step 5: Process the dynamic coil structure according to the construction standards of the drawings;

[0011] Step 6: Put the stationary ring structure on the outside of the moving ring structure to form a TC bearing.

[0012] As a preferred technical solution of the present invention, the static ring structure is processed from the static ring body steel, and the overall structure is a circular ring, and the inner side of the static ring body steel is provided with an annular hard alloy wear-resistant layer; the dynamic ring structure is processed from the dynamic ring body steel, and the overall structure is a circular ring, and the outer side of the dynamic ring body steel is provided with an annular hard alloy wear-resistant layer.

[0013] As a preferred technical solution of the present invention, in the step 2, the ball roller hole is a vertical through hole, and the central axis direction of the ball roller hole is parallel to the central axis direction of the stationary ring structure.

[0014] As a preferred technical solution of the present invention, the spacing between adjacent ball roller holes is 8mm to 10mm, and they are evenly arranged in a circular array on the inner side of the annular groove of the stationary ring structure; the cross-section of the ball roller hole is a circular structure, the diameter of the ball roller hole is punched according to the diameter of the ball and roller, and the diameter of the ball roller hole does not exceed the size required by the inner diameter drawing of the stationary ring structure, and the outer diameter of the ball roller hole must be consistent with the annular groove surface of the stationary ring structure.

[0015] As a preferred technical solution of the present invention, in step three, the bottom end of the ball roller hole is sealed by welding, and the bottom end and inner wall of the stationary ring structure are polished after welding to keep the sealed area of ​​the bottom end of the ball roller hole smooth.

[0016] As a preferred technical solution of the present invention, in the step three, the length of the sealed area at the bottom end of the ball and roller hole does not exceed 5 mm. After sealing, the balls or rollers are inserted from the top of the ball and roller hole. The balls or rollers are inserted adjacent to each other up and down, and multiple balls or rollers are inserted. After the insertion is completed, a space of no more than 5 mm is reserved on the upper part of the balls or rollers for sealing in step four.

[0017] As a preferred technical solution of the present invention, in step four, the top of the ball roller hole is sealed by welding, and the top and inner wall of the stationary ring structure are polished after welding to keep the sealed area of ​​the top of the ball roller hole smooth.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention changes the sliding friction of the cemented carbide friction surfaces of the stationary ring structure and the dynamic ring structure into rolling friction, and uses rolling friction instead of the sliding friction between the two, thereby minimizing the friction force of the friction working surface and extending the service life of the TC bearing to the maximum extent, which is more than 10 times longer than the current TC bearing life, saving steel for producing TC bearings, improving drilling production efficiency, and saving production costs. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] The present invention provides a method for manufacturing a radial TC bearing for oil drilling, comprising the following steps:

[0021] Step 1: Process the static ring structure according to the construction standards of the drawing.

[0022] The stationary ring structure is processed according to the drawings. The stationary ring structure is processed from the stationary ring body steel and has an overall circular ring structure. An annular hard alloy wear-resistant layer is arranged on the inner side of the stationary ring body steel.

[0023] Step 2: Process the ball roller hole inside the annular groove of the stationary ring structure.

[0024] The ball roller hole is a vertical through hole, and the central axis direction of the ball roller hole is parallel to the central axis direction of the stationary ring structure; the spacing between adjacent ball roller holes is 8mm~10mm, and they are evenly arranged in a circular array on the inner side of the annular groove of the stationary ring structure; the cross-section of the ball roller hole is a circular structure, the diameter of the ball roller hole is punched according to the diameter of the ball and roller, and the diameter of the ball roller hole does not exceed the size required by the inner diameter drawing of the stationary ring structure, and the outer diameter of the ball roller hole must be consistent with the annular groove surface of the stationary ring structure.

[0025] The ball and roller holes are used to place balls or rollers, so that when the stationary ring structure and the moving ring structure are fitted together, the balls or rollers can be used to replace the friction between the two, thereby achieving the effect of reducing friction, thereby extending the service life of the TC bearing.

[0026] Step 3: Seal the lower end of the ball and roller hole and put the ball or roller in.

[0027] The bottom end of the ball roller hole is sealed by welding, and the bottom end and inner wall of the stationary ring structure are polished after welding to keep the sealed area of ​​the bottom end of the ball roller hole smooth; the length of the sealed area of ​​the bottom end of the ball roller hole does not exceed 5mm. After sealing, the balls or rollers are put in from the top of the ball roller hole, and the balls or rollers are put in adjacent to each other up and down, and multiple balls or rollers are put in; after the insertion is completed, a space of no more than 5mm is reserved on the upper part of the ball or roller for sealing in step four.

[0028] The lower end of the ball and roller hole is sealed and polished to ensure the smoothness of the contact surface and avoid the situation where it cannot be assembled with other equipment; the sealed ball and roller hole can prevent the ball or roller from falling off.

[0029] Step 4: After the balls or rollers are placed in, seal the upper ends of the ball and roller holes.

[0030] The top of the ball roller hole is sealed by welding, and the top and inner wall of the stationary ring structure are polished after welding to keep the sealed area of ​​the top of the ball roller hole smooth.

[0031] Similarly, the upper end is sealed and polished to ensure the flatness of the contact surface, avoid additional friction, and avoid the situation where it cannot be assembled with other equipment; the upper and lower ends of the ball and roller holes are sealed to prevent the ball or roller from escaping from the hole.

[0032] Step 5: Process the dynamic coil structure according to the construction standards in the drawing.

[0033] The moving coil structure is processed from the moving coil body steel, and the overall structure is annular, and the outer side of the moving coil body steel is provided with an annular hard alloy wear-resistant layer. The length of the moving coil structure is the same as that of the static coil structure.

[0034] Step 6: Put the stationary ring structure on the outside of the moving ring structure to form a TC bearing.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a radial TC bearing for oil drilling, characterized in that: The steps include: Step 1: Process the static ring structure according to the construction standards of the drawings; Step 2: Processing a ball roller hole on the inner side of the annular groove of the stationary ring structure; Step 3: Seal the lower end of the ball and roller hole and put the ball or roller in; Step 4: After the balls or rollers are placed in, seal the upper end of the ball and roller holes; Step 5: Process the dynamic coil structure according to the construction standards of the drawings; Step 6: Put the stationary ring structure on the outside of the moving ring structure to form a TC bearing.

2. The method for manufacturing a radial TC bearing for oil drilling according to claim 1, characterized in that: The stationary ring structure is processed from the stationary ring body steel, and has an overall circular ring structure, and an annular hard alloy wear-resistant layer is arranged on the inner side of the stationary ring body steel; the dynamic ring structure is processed from the dynamic ring body steel, and has an overall circular ring structure, and an annular hard alloy wear-resistant layer is arranged on the outer side of the dynamic ring body steel.

3. The method for manufacturing a radial TC bearing for oil drilling according to claim 1, characterized in that: In the step 2, the ball roller hole is a vertical through hole, and the center axis direction of the ball roller hole is parallel to the center axis direction of the stationary ring structure.

4. The method for manufacturing a radial TC bearing for oil drilling according to claim 2, characterized in that: The spacing between adjacent ball and roller holes is 8mm to 10mm, and they are evenly arranged in a circular array on the inner side of the annular groove of the stationary ring structure; the cross-section of the ball and roller holes is a circular structure, the diameter of the ball and roller holes is drilled according to the diameter of the balls and rollers, and the diameter of the ball and roller holes does not exceed the size required by the inner diameter drawing of the stationary ring structure, and the outer diameter of the ball and roller holes must be consistent with the annular groove surface of the stationary ring structure.

5. The method for manufacturing a radial TC bearing for oil drilling according to claim 1, characterized in that: In the step three, the bottom end of the ball roller hole is sealed by welding, and the bottom end and inner wall of the stationary ring structure are polished after welding to keep the sealed area of ​​the bottom end of the ball roller hole smooth.

6. The method for manufacturing a radial TC bearing for oil drilling according to claim 1, characterized in that: In the step three, the length of the sealed area at the bottom end of the ball and roller hole does not exceed 5 mm. After sealing, the balls or rollers are put in from the top of the ball and roller hole. The balls or rollers are put in adjacent to each other up and down, and multiple balls or rollers are put in. After the balls or rollers are put in, a space of no more than 5 mm is reserved on the upper part of the balls or rollers for sealing in step four.

7. The method for manufacturing a radial TC bearing for oil drilling according to claim 1, characterized in that: In the step 4, the top of the ball roller hole is sealed by welding, and the top and inner wall of the stationary ring structure are polished after welding to keep the sealed area of ​​the top of the ball roller hole smooth.