CN102756202A - Single-face resistance seam welding method for wear-resistant belt of oil drill pipe - Google Patents
Single-face resistance seam welding method for wear-resistant belt of oil drill pipe Download PDFInfo
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- CN102756202A CN102756202A CN2011101079089A CN201110107908A CN102756202A CN 102756202 A CN102756202 A CN 102756202A CN 2011101079089 A CN2011101079089 A CN 2011101079089A CN 201110107908 A CN201110107908 A CN 201110107908A CN 102756202 A CN102756202 A CN 102756202A
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Abstract
The invention relates to a manufacture and repair technique of oil drill pipes, in particular to a single-face resistance seam welding method for a wear-resistant belt of an oil drill pipe. Both a welding roller and a conducting roller are positioned on the drill pipe, a wear-resistant welding wire is pressed on the surface of the drill pipe by the welding roller under the action of pressure, and the conducting roller is directly pressed on the surface of the drill pipe. When welding current passes through the welding wire and the surface of the drill pipe from the welding roller, the welding wire is heated and welded on the surface of the drill pipe. The welding pressure ranges from 300N to 380N, the pressure on the conducting roller ranges from 1000N to 1500N, conduction time ranges from 0.3S to 0.6S, off time ranges from 0.06S to 0.1S, welding speed ranges from 0.3m/min to 0.8m/min, and the welding current ranges from 8KA to 13KA. The single-face resistance seam welding method has the advantages that a heat-affected zone and welding stress are small, so that the probability of cracking is reduced, and damage to base metal of the drill pipe during surfacing is eliminated. Besides, environmental pollution is reduced, labor conditions are improved, the service lives of the rollers are prolonged, and the single-face resistance seam welding method is applicable to popularization and use in the oil drilling industry.
Description
Technical field
The present invention relates to a kind of oil drill rocker manufacturing and recovery technique, the wear-resisting band single face of a kind of specifically oil drill rocker electric-resistance seam-welding method.
Background technology
In Process of Oil Well Drilling, especially in the drilling process of deep-well and ultradeep well,, thereby cause the wearing and tearing of drilling rod and internal surface of sleeve pipe sharply to strengthen owing to effect of factors such as radial load, whirling motion and oscillation crosswise, can sleeve pipe is worn out when serious.In order to address this problem, for many years, the wear-resisting welding wire to the abrading section of oil drill rocker built-up welding WC-12Co, abrasion-proof iron matrix powder, Cr-Mn-Mo alloy series is adopted in the oil field always both at home and abroad, like materials such as PT100, the 100XT of peace section.
At present, plasma or melt pole electrical arc soldering method are almost all adopted in the built-up welding of wear-resisting band, and used welding machine is mainly DP-300, DP-500 and NBC-500K etc.
The subject matter that exists with said method build-up wear-resistant band is, because plasma arc welding (PAW) or metal arc welding thermal treatment zone field width, the arc column temperature is high, can cause comparatively obvious impairment to the drilling rod mother metal inevitably.Promptly be exactly, weld deposit process is seriously grown up the crystal grain of mother metal, and the martensite hardened structure occurs and cause bigger welding stress, thereby near overlay cladding, cracks.Especially under the situation of repeatedly built-up welding, drilling rod is in use ruptured, cause serious drilling failure.
Summary of the invention
The objective of the invention is to propose a kind of drilling rod wear-resistant belt weld deposit process that can fundamentally solve to drilling rod mother metal damage, and wearing layer is not prone to the wear-resisting band single face of a kind of oil drill rocker electric-resistance seam-welding method that cracking and big bulk come off.
The present invention is with the wear-resisting welding wire of 100 types (6), is pressed on the surface of oil drill rocker through welding roll (3); Conductive roller (1) closely contacts with the drilling rod surface under the effect of its pressure F2.The elementary winding of welding transformer (4) is connected with conductive roller (1) with welding roll (3) through soft copper band (2).When welding procedure control cabinet (5) gets into welding energising program, powerful electric current is just arranged through welding roll (3), welding wire (6), drilling rod upper surface and conductive roller (1), electric current line (7) is as shown in Figure 1.When welding current flows through welding wire (6) and drilling rod surface; By the resistance of welding wire (6) itself and the resistance heat of contact resistance generation thereof; To make wear-resisting tape welding silk (6) heat fused; And under the effect of welding roll (3) pressure F1 (pressure F1 can apply through the cylinder on the welding machine), wear-resisting tape welding silk (6) is welded to the surperficial (see figure 1) of oil drill rocker.
The method of oil drill rocker single face electric-resistance seam-welding method is following: wear-resisting tape welding silk (6) (sub-thread or the multiply) termination that will select earlier before the welding is pressed between welding roll (3) and the oil drill rocker; The width of welding roll (3) is generally about 10mm, and welding pressure is about 350N; The width of conductive roller (1) is 25mm, and conductive roller (1) the pressure F2 that applies above that is about 1500N; Welding roll (3) is made with chrome zirconium copper alloy, and conductive roller is made with red copper.Distance between conductive roller (1) and the welding roll (3) is 30mm, when pair limit output voltage U 2 of welding transformer (4) is 8V, can obtain the above welding current of 9KA.Welding process is made up of the welding energising and two programs of stopping, and is generally 0.3～0.6S conduction time; Stop time is 0.06～0.1S.
In the welding process, drive the oil drill rocker rotation by swing roller (9); Move along axis direction by sending cylinder (10) drive drilling rod (8) to; Wear-resisting tape welding silk (6) is by wire reel (11) automatic feed under the drive of spin friction power.Like this, under the control of welding and programme-control case, the rapid welding of wear-resisting band can be realized, the linear velocity of 1m/mim can be reached the soonest.
The program behavior of welding process is following: set standard parameter (F1, F2, conduction time, stop time, welding current, speed of welding, feed rate) → connection electromagnetic gas valve, the F1 that exerts pressure, F2 are pressed on the weldment surface with welding wire; Conductive roller closely contacts → starts welding procedure with the weldment surface; The energising welding, drilling rod rotates and sends to → be welded in place simultaneously, the travel switch action; Welding roll and conductive roller lift, and drilling rod stops the rotation and sends to.
Above-mentioned course of action is accomplished by welding procedure control cabinet (5).
When the invention has the advantages that the single face electric-resistance seam-welding; Only from the surface current mistake of oil drill rocker, heating region is very narrow, generally is merely about 0.4S the conduction time of each solder joint in addition for electric current; So heat affected area and welding stress are all very little; Thereby obviously reduced the probability that crackle produces, eliminated in weld deposit process damage, and wearing layer has not been prone to cracking and big bulk comes off the drilling rod mother metal.Also have improving working conditions simultaneously, reduce pollution, prolong the advantages such as service life of roller environment.The present invention is particularly suitable in the oil drilling industry, extensively promoting the use of.
Description of drawings
Fig. 1 is a fundamental diagram of the present invention.
Fig. 2 is a special equipment installation drawing of the present invention.
Fig. 3 is the installation diagram of conductive solder device of the present invention on welding machine.
The 1-conductive roller; 2-soft copper band; The 3-welding roll; The 4-welding transformer;
5-welding procedure control cabinet; The 6-welding wire; 7-electric current line; The 8-drilling rod;
The 9-swing roller; 10-sends cylinder to; The 11-wire reel.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is explained further details:
Embodiment 1
Welding roll (3) and conductive roller (1) is placed in above the drilling rod, and keeps with one heart, and the width of welding roll (3) is about 10mm that the spacing between two rollers is 25-35mm; Wear-resisting tape welding silk (6) is pressed between welding roll (3) and drilling rod (8) surface, and conductive roller (1) directly closely contacts with drilling rod (8) surface; When the face of weld of electric current between two rollers flows through, rely on the resistance heat wear-resisting tape welding silk of heating and melting (6), and under the effect of welding pressure, wear-resisting tape welding silk (6) is welded to oil drill rocker (8) surface; Drilling rod constantly rotates and sends to during welding, thereby can weld out continuous wear-resisting tape welding seam.
Single face electric-resistance seam-welding conductive solder device with shown in Figure 2 is installed in by Fig. 3 on the resistance welder of 100KVA, and the wear-resisting band of the oil drill rocker of Φ 127mm is welded, and wear-resisting tape welding filament diameter is 5mm, and welding variables is following:
Welding roll pressure: 350N;
Conductive roller pressure: 1000N;
Conduction time: 15 weeks;
Stop time: 3 weeks;
Speed of welding: 0.7m/min;
Welding roll width: 10mm;
Conductive roller width: 25mm;
Welding roll and conductive roller spacing: 30mm.
Use the MM-360A ammeter during welding, the welding current virtual value that records is 9.9～10.2KA.Under 15 minutes condition of continuous operation, the conductive solder device is in proper working order, does not have obvious temperature rise, welding quality stable.
The same.
With single face shown in Figure 2 seam weldering conductive solder device, on the resistance welder that is installed in 200KVA shown in Figure 3, the wear-resisting band of the oil drill rocker of Φ 127mm is welded, the gage of wire of wear-resisting carrying material is 5mm.Welding variables is following:
Welding roll pressure: 300N;
Conductive roller pressure: 1200N;
Conduction time: 18 weeks;
Stop time: 3 weeks;
Speed of welding: 0.8m/min;
Welding roll width: 10mm;
Conductive roller width: 25mm;
Welding roll and conductive roller spacing: 30mm.
Use the MM-360A ammeter during welding, recording the welding current value is 9.6～9.9KA, and under 16 minutes situation of continuous operation, electric installation is in proper working order, does not have obvious temperature rise, welding quality stable.
Claims (2)
1. the wear-resisting band single face of an oil drill rocker electric-resistance seam-welding method is characterized in that welding roll (3) and conductive roller (1) are located at above the drilling rod (8), and keeps with one heart.The width of welding roll (3) is 10-15mm, and the spacing between two rollers is 25-30mm.Wear-resisting tape welding silk (6) is pressed between welding roll (3) and drilling rod (8) surface, and conductive roller (1) directly closely contacts with drilling rod (8) surface.When the face of weld of electric current between two rollers flows through, rely on the resistance heat wear-resisting tape welding silk of heating and melting (6), and under the effect of welding pressure, wear-resisting tape welding silk (6) is welded to oil drill rocker (8) surface.
2. the wear-resisting band single face of oil drill rocker according to claim 1 electric-resistance seam-welding method is characterized in that welding pressure 300～380N; Conductive roller pressure 1000～1500N; Conduction time 0.3～0.6S; Stop time 0.06～0.1S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101079089A CN102756202A (en) | 2011-04-27 | 2011-04-27 | Single-face resistance seam welding method for wear-resistant belt of oil drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101079089A CN102756202A (en) | 2011-04-27 | 2011-04-27 | Single-face resistance seam welding method for wear-resistant belt of oil drill pipe |
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| Publication Number | Publication Date |
|---|---|
| CN102756202A true CN102756202A (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101079089A Pending CN102756202A (en) | 2011-04-27 | 2011-04-27 | Single-face resistance seam welding method for wear-resistant belt of oil drill pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112894193A (en) * | 2021-02-03 | 2021-06-04 | 新疆应用职业技术学院 | Welding method of metal composite plate |
| CN114260608A (en) * | 2022-01-13 | 2022-04-01 | 广东韶钢松山股份有限公司 | Welding device and using method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021823B2 (en) * | 1981-12-11 | 1985-05-29 | トヨタ自動車株式会社 | seam welding machine |
| CN2396923Y (en) * | 1999-08-30 | 2000-09-20 | 大连奥托技术有限公司 | Top skin automatic seam-welding equipment |
| KR20020050959A (en) * | 2000-12-22 | 2002-06-28 | 이구택 | seam welding control method in cold-hearted continuity process |
| CN1857842A (en) * | 2006-04-10 | 2006-11-08 | 西北工业大学 | Welding process of stainless steel band onto surface of steel rail |
-
2011
- 2011-04-27 CN CN2011101079089A patent/CN102756202A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021823B2 (en) * | 1981-12-11 | 1985-05-29 | トヨタ自動車株式会社 | seam welding machine |
| CN2396923Y (en) * | 1999-08-30 | 2000-09-20 | 大连奥托技术有限公司 | Top skin automatic seam-welding equipment |
| KR20020050959A (en) * | 2000-12-22 | 2002-06-28 | 이구택 | seam welding control method in cold-hearted continuity process |
| CN1857842A (en) * | 2006-04-10 | 2006-11-08 | 西北工业大学 | Welding process of stainless steel band onto surface of steel rail |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112894193A (en) * | 2021-02-03 | 2021-06-04 | 新疆应用职业技术学院 | Welding method of metal composite plate |
| CN112894193B (en) * | 2021-02-03 | 2022-05-10 | 新疆应用职业技术学院 | Welding method of metal composite plate |
| CN114260608A (en) * | 2022-01-13 | 2022-04-01 | 广东韶钢松山股份有限公司 | Welding device and using method thereof |
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Application publication date: 20121031 |