Wear and corrosion resistant iron-based alloy laser-cladding petroleum drill stem joint
An oil drill pipe joint and laser cladding technology, applied in drill pipe, drill pipe, earth-moving drilling, etc., can solve the problems of easy slippage of the clamping part of the pipe wrench, complex composite process, and inability to local treatment, etc., and achieves the degree of automation High laser energy density, uniform and fine grains
Active Publication Date: 2014-03-26
青岛麒特新材料科技有限公司
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Problems solved by technology
However, nitriding or sulfurizing cannot be treated locally. When working up and down the drill pipe, the clamping part of the pipe wrench is easy to slip, and special working tools are required.
In addition, the composite process is more complicated and the cost is higher
Method used
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Embodiment
[0031] Carry out laser cladding treatment on the drill pipe joint, which is carried out in the following steps:
[0032] (1) Wipe the surface of the drill pipe joint to be treated with acetone to completely remove the oil.
[0033] (2) Put the drill pipe joint on the rotary table, and use the gravity powder feeder to adjust it to a suitable powder feeding rate of 15-30g / min.
[0034] (3) Scan the surface with a laser while feeding the powder. The process parameters for laser cladding are: laser power 3-4kW, scanning speed 200-300mm / min, and overlapping rate 20-30%. The specific components of the iron-based alloy powder are as follows: C, 0.1-1.5; Cr, 10-30; Ni, 1-10; Mn, 0.2-3.0; Mo, 0.1-3.0; Si, 1.0- 2.5; B, 0.1-3.5; the balance is iron, and the sum of its weight is 100%.
[0035] (4) After the drill pipe joint is naturally cooled to room temperature, the surface is cleaned and inspected.
[0036] The surface of the drill pipe joint has a layer of laser cladding wear-resis...
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Abstract
The invention relates to a wear and corrosion resistant iron-based alloy laser-cladding petroleum drill stem joint. A layer of laser-cladding wear and corrosion resistant iron-based alloy coating is arranged on the surface of the drill stem joint and has the advantages of favorability in forming, compact tissue, uniformity in components and no crack; and the thickness of the laser-cladding wear and corrosion resistant iron-based alloy coating can be accurately controlled within 0.3 to 1.5mm. Cladding layers are not needed to completely cover the surface of the whole drill stem joint and are only required to respectively clad easily-abrasive belts at two ends of a joint cylinder for 30-50mm. The iron-based alloy powder comprises the following components in percentage by weight: 0.1-1.5 percent of C, 10-30 percent of Cr, 1-10 percent of Ni, 0.2-3.0 percent of Mn, 0.1-3.0 percent of Mo, 1.0-2.5 percent of Si, 0.1-3.5 percent of B and the balance of Fe, wherein the total weight percentage is 100 percent. According to the wear and corrosion resistant iron-based alloy laser-cladding petroleum drill stem joint, the problem that the drill stem joint is high in failing speed in an oil field is solved; the automation of a manufacturing and processing process of the drill stem joint is easily realized; and the drill stem joint has the advantages of high work efficiency, great advantages in economy and broad popularization prospect.
Description
technical field [0001] The invention belongs to the field of oil drilling equipment, in particular to a wear-resistant and corrosion-resistant iron-based alloy laser cladding oil drill pipe joint. Background technique [0002] Drill pipe joint is an important part of oil drill string, its working condition is very harsh, and its stress situation is very complicated. It has to withstand various loads such as tension, bending, torsion, and vibration. In addition, the joint is also corroded by drilling fluid and formation medium during drilling, and its exterior is also subject to severe wear. Therefore, the hardening of the drill pipe joint and the improvement of its anti-wear and anti-corrosion performance are particularly important. Joints made of ordinary metal materials have been gradually eliminated due to difficulty in adapting to the current wear and corrosion environment. [0003] In order to improve the service life of drill pipe joints, the hardness is generally in...
Claims
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IPC IPC(8): E21B17/02C23C24/10C22C38/54C22C38/58
Inventor 韩彬王勇孙建波董立先李美艳高宁
Owner 青岛麒特新材料科技有限公司