CN103350297B - Cooling device and method for butt welding of coiled tubing - Google Patents
Cooling device and method for butt welding of coiled tubing Download PDFInfo
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- CN103350297B CN103350297B CN201310264762.8A CN201310264762A CN103350297B CN 103350297 B CN103350297 B CN 103350297B CN 201310264762 A CN201310264762 A CN 201310264762A CN 103350297 B CN103350297 B CN 103350297B
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Abstract
The invention discloses a cooling device and method for butting welding of coiled tubing. The cooling device systematically comprises cooling blocks, a water pump, a flow regulation device, a temperature measuring and controlling device, a connecting pipeline, a backwater supplying device and the like. During work, the copper cooling blocks which are matched with a to-be-welded coiled tubing are selected and mounted according to the outer diameter of the to-be-welded coiled tubing; and the connecting pipeline and a circuit are used for reducing heat effect of welding heat on a welded seam area when coiled tubing is welded, and the cooling speed of a connector and a welding heat effect area is increased, so that the width of the welding heat effect area is reduced, high-temperature dwell time is reduced, the grain growth tendency is slowed down, and the welding joint performance is improved.
Description
Technical field
The present invention relates to materials hot working technical field, particularly a kind of continuous-tube butt welding cooling device and method.Be applicable to the various sizes specification that uses at present and yield strength grade is 482.65-689.5Mpa(70-100Kpsi) the pipe-pipe butt welding of steel continuous-tube, be also applicable to the occasion that other pipe-pipe butt welding need to carry out welding point accelerating cooling simultaneously.
Background technology
Continuous-tube (Coiled Tubing, be called for short CT, also referred to as coiled tubing, coiled tubing, coiled pipe or coil pipe) refer to employing metal material, mainly steel are made and can be coiled on major diameter (being generally about more than 1m) reel, and a kind of hundreds of rice that reaches is to the pipe not having joint of a few km.The continuous-tube operation technique of continuous-tube and working rig composition thereof, has a wide range of applications in fields such as oil exploration, drilling well, well-flushing, petroleum transportation, is described as " the omnipotent implement " of 21 century.
Continuous-tube plays very important role in continuous-tube operation.In work progress, be coiled in continuous-tube on reel through traction, stretching, bendingly turn to and again after alignment, as the work string of construction operation medium transport, be admitted to down-hole; After operation, reel counter motion, is dragged to pull by down-hole by continuous-tube and enhances, and is again wound on reel, so that Reusability.Different actions, operating environment and running parameter, require that continuous-tube has excellent comprehensive mechanical property, can meet the drawing of complexity, press, squeeze, swollen, wash away, work under the comprehensive function condition such as corrosion and fatigue.
Research shows, ultra-fine grain is the key character of continuous-tube tubing in microscopic structure, and obtaining fine grain and ultra-fine grain by specific smelting, the operation of rolling, thus form refined crystalline strengthening, is the guarantee of continuous-tube excellent combination mechanical property.In other words, the excellent combination mechanical property of continuous-tube, mainly based on the ultra-fine grain microscopic structure that tubing has.
The tube and tube butt welding of continuous-tube is content indispensable during continuous-tube manufacture and continuous-tube technology are applied.But welding thermal process can impel the grain growth of welding heat affected zone, property of welded joint is caused to decline.For this reason, by certain cooling way, reduce the heat input in welding thermal process butt welded seam region, the Thermal Cycle of welding heat affected zone (HAZ) is controlled, reduce the width of welding heat affected zone as much as possible, reduce high-temperature residence time, reducing thin brilliant growing up, is one of effective guarantee and the core technology improving continuous-tube tube and tube butt girth welding seam structure property.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the object of the present invention is to provide a kind of continuous-tube butt welding cooling device and method, for when continuous-tube tube and tube welds, reduce the heat effect in welding thermal process butt welded seam region, add the cooling velocity of quick coupling and welding heat affected zone, reach reduce welding heat affected zone (heat affected zone, abbreviation HAZ) width, reduce high-temperature residence time, slow down Grain growth trend and improve the object of property of welded joint.
In order to achieve the above object, technical scheme of the present invention is:
A kind of continuous-tube butt welding cooling device, comprise water pump 2, water pump 2 is placed on and fills in the confession water recovery apparatus 6 of enough water, water pump 2 delivery port is connected with five-way joint 7 by pipeline, water pump 2 outlet pipeline installs flow regulator 3, adjusting device 3 is connected with temperature measurement and control instrument 4, and five-way joint 7 is fixed on dividing plate 8, and 4 joints on five-way joint 7 top are connected with 4 cooling block back with water inlet line 5 respectively and are connected to two cooling blocks be oppositely arranged 1; Each cooling block 1 forms by two semicircle matrixes 9, each semicircle matrix 9 is separately installed with 2 snap joints 10, is respectively entery and delivery port; 4 cooling block back with water inlet line 5 are connected with 2 semicircle matrixes of each cooling block by being fixed on the snap joint on two cooling blocks.
4 described cooling block return pipings 5 are connected to the delivery port of each semicircle matrix 9 of cooling block 1 and between water recovery apparatus, wherein one end is connected by snap joint 10 with two cooling blocks 1, and the other end is connected with the backwater joint be fixed on dividing plate 8.
Described cooling block 1 external form is a front end is the cylinder of frustum, wall thickness 10-20mm, each front end is that the cylinder of frustum is connected to form by hinge or loose-leaf 16 by two semicircle matrixes 9, cooling block 1 internal diameter is outer through identical with welded continuous-tube, each semicircle matrix 9 inside is processed with 2 straight holes 13 and 1 annular groove 15, mutual UNICOM forms the circulating water channel of sealing, and straight hole 13 tail end is connected with water-in and water-out joint; The groove on circulating water channel top is bumped into ring-type bar shaped Copper fabrication cover plate 14 that is wide, uniform thickness and seals, ring-type bar shaped Copper fabrication cover plate one is longer, one shorter, and when two semicircle matrixes fasten, the part that its cover plate grows will be inserted in the working groove of another semicircle matrix.
Based on a kind of continuous-tube butt welding cooling means of said apparatus, comprise the following steps:
The solid thermocouple wire of step one, point, thermocouple wire point being welded in tube surfaces needs to control, on the monitoring point of maximum heating temperature or high-temperature residence time, to play the effect of measuring tempeature in welding process; Select according to the external diameter of continuous-tube to be welded and install copper cooling block 1 supporting with it additional, copper cooling block 1 is 10 ~ 15mm apart from pipe end distance;
Step 2, connecting line; Cooling block 1 is passed in and out water end (W.E.) be connected by plastic tube with water pump 2 and dividing plate 8, guarantee that water route is unimpeded;
Step 3, temperature measurement and control instrument 4 to be connected with thermocouple wire and flow regulator;
Step 4,30-50L water will be added for water recovery apparatus 6, guarantee the cooling effect of welding process Welded Joints;
Step 5, temperature adjusting, start welding, temperature measurement and control instrument 4 and water pump 2 be energized, make cooling device work.
The present invention is that regulate and have 2 kinds of modes, one is manual preset mode by regulating the method for cooling block circulating water flow to realize the change within the specific limits of weld seam cooling velocity; Another kind is temperature feedback regulative mode, and manual preset mode is that before weldering or in welding process, mode manually carrys out adjust flux adjusting device 3 with controlled circulation discharge; The method is applicable to the mature and stable situation of continuous-tube welding procedure; Temperature feedback regulative mode carries out thermometric at the control point place of HAZ setting, with the maximum heating temperature at measuring point place or high-temperature residence time for sampled signal, the temperature signal recorded is converted to the signal of telecommunication and carrys out the adjustment that control flow check quantity regulating device 3 is able to controlled circulation discharge; By the control to measuring point Thermal Cycle, reach reduce welding heat affected zone width, reduce high-temperature residence time, slow down Grain growth trend and improve the object of property of welded joint.
The present invention, by installing cooling block 1 on body additional, utilizes heat exchange pattern to cool to the pressure realizing butt welded seam.Before welding, install a secondary copper cooling block 1 additional welded continuous-tube is symmetrical on the body of weld seam, cooling block is tubular, and inwall and continuous-tube tube wall are fitted.During welding, the heat in Jin Feng district is transmitted to cooling block by body, there is water-in and water-out interface cooling block side, enter the sealing circulation canal of cooling block inside through water inlet from the current of water pump, take away heat, get back to for water recovery apparatus through delivery port and pipeline again, realize cooling the cooling down of cooling block and the pressure of butt welded seam HAZ.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the schematic diagram of cooling block 1, and wherein Fig. 2-A is front view, and Fig. 2-B is longitudinal cross-sectional view, and Fig. 2-C is side view.
Fig. 3 is for backwater part-structure sketch.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
With reference to Fig. 1: a kind of continuous-tube butt welding cooling device, comprise water pump 2, water pump 2 is placed on and fills in the confession water recovery apparatus 6 of enough water, pump outlet is connected with five-way joint 7 by pipeline, water pump water outlet pipeline is installed flow regulator 3, flow regulator 3 is connected with temperature measurement and control instrument 4, by regulate manually and and the temperature measurement and control instrument 4 folding size that controls Flow-rate adjustment two kinds of mode regulation gate valves change the uninterrupted of water pump; Five-way joint 7 is fixed on dividing plate 8; 4 joints on five-way joint 7 top are connected with 4 cooling block back with water inlet line 5 respectively and are connected to two cooling blocks be oppositely arranged 1; Each cooling block 1 forms by two semicircle matrixes 9, each semicircle matrix 9 is separately installed with 2 snap joints 10, is respectively entery and delivery port; 4 cooling block back with water inlet line 5 are connected with 2 semicircle matrixes of each cooling block by being fixed on the snap joint on two cooling blocks.
4 described cooling block return pipings 5 are connected to the delivery port of each semicircle matrix 9 of cooling block 1 and between water recovery apparatus, wherein one end is connected by snap joint 10 with two cooling blocks 1, and the other end is connected with the backwater joint be fixed on dividing plate 8.
With reference to Fig. 2, described cooling block 1 external form is a front end is the cylinder of frustum, wall thickness 10-20mm, each " front end is the cylinder of frustum " is connected to form by hinge or loose-leaf 16 by two semicircle matrixes 9, cooling block 1 internal diameter is outer through identical with welded continuous-tube, each semicircle matrix 9 inside is processed with 2 straight holes 13 and 1 annular groove 15, and mutual UNICOM forms the circulating water channel of sealing, and straight hole tail end is connected with water-in and water-out joint; The groove on circulating water channel top is bumped into ring-type bar shaped Copper fabrication cover plate that is wide, uniform thickness and seals, ring-type bar shaped Copper fabrication cover plate one is longer, one shorter, and when two semicircle matrixes fasten, the part that its cover plate grows will be inserted in the working groove of another semicircle matrix.Before welding, copper water cooling block hitch to be arranged on welded continuous-tube weld seam both sides by the determined position of welding procedure by the folding of hinge or loose-leaf and buckle alignment pin, front end frustum is facing to weld seam, be convenient to welding operation and observation, tail end and water-in and water-out joint connect water pipe, inner diameter wall contacts with continuous-tube body and fits, thus realizes the pressure cooling of weld seam HAZ.
Described water pump 2 adopts small-sized fresh water immersible pump, parameters selection scope: exchange 220 ~ 240V, 50Hz; Power 100 ~ 300W; Maximum stream flow 3000 ~ 6000L/h; Lift 5 ~ 10m.Function is for copper water cooling block provides cooling circulating water.
Described flow regulator 3 is when water pump has flow regulating function, and the manually preset and temperature feedback Flow-rate adjustment of flow will directly utilize the flow regulator of water pump to realize.When water pump self does not possess flow regulating function, flow restriction control (be also called and become valve regulation) method will be adopted, namely on water pump water outlet pipeline, gate valve is installed, is changed the uninterrupted of water pump by the folding size of regulation gate valve.Although this method, can cause certain loss of flood peak, not very economical when reducing flow, the method is simple and easy to do, and using in short-term in welding for small pump and continuous-tube is still very suitable.Gate valve flow regulator is arranged in water pump water outlet pipeline, and the discharge for manual preset and temperature feedback regulates.
4) temperature measurement and control instrument drives two parts to form by thermometric and amplification.Temperature element adopts thermocouple, and choosing conditions is that highest measurement temperature is not less than 1300 DEG C, and diameter is not more than 0.5mm, and low-cost nickel chromium triangle-nisiloy silk thermocouple is selected in suggestion.During work, the working end point of thermocouple is welded in welding heat affected zone and is determined to need temperature controlled position by welding procedure; The free end of thermocouple is connected with the measuring circuit end amplifying drive part.Amplify to drive and be made up of major parts such as measuring circuit, voltage comparator, delay circuit, driving element relays.Measuring circuit receives the thermo-electromotive force signal converted to from Thermocouple Temperature Signal, and compare with the voltage (according to the functional relation of thermo-electromotive force with temperature) that voltage comparator sets, when the voltage of thermocouple meets and exceeds the voltage of setting, the output of voltage comparator will overturn, according to the difference of controling parameters, open further through time delay or not time delay rear drive Flow-rate adjustment gate valve, reach the adjustment that flow increases.Temperature feedback regulates the selection that can to complete 2 kinds of controling parameter according to the temperature test of Thermal Cycle: a kind of is control to measuring point place maximum heating temperature, the method is thermo-electromotive force comparative voltage being set as the predetermined maximum heating temperature in measuring point place, when the voltage of thermocouple meets and exceeds setting voltage, gate valve is driven directly, circulating cooling water flow increases, and realizes the control to the predetermined maximum heating temperature in measuring point place.Another kind is the control to measuring point place high-temperature residence time, the method is thermo-electromotive force comparative voltage being set as the high-temperature temperature that measuring point place is predetermined, and delay circuit is set to predetermined high-temperature residence time, after the voltage of thermocouple meets and exceeds setting voltage, delay circuit starts timing, and when timing reaches the high-temperature residence time of setting, gate valve is driven, circulating cooling water flow increases, and realizes the control to the measuring point place predetermined high temperature time of staying.
5) connecting line is made up of water flowing pipeline, five-way joint, snap joint.Connected mode is shown in Fig. 3, water from water pump enters bottom five-way joint, each pipeline is assigned to by 4 joints on five-way top, the water pumping into each pipeline enters the circulating water channel in 4 semicircle matrixes (2 copper water cooling blocks) separately through the water inlet of copper water cooling block, then gets back to for water recovery apparatus through delivery port and pipeline.The pipeline be connected with copper water cooling block totally 8,4 is back with water inlet line, is connected between five-way upper connection and cooling block water inlet; 4 is return piping, is connected to cooling block delivery port and supplies between water recovery apparatus.Pipeline is selected and is withstand voltagely not less than 0.6MPa, and heatproof is not less than the PVC hose of 80 DEG C.For reducing the loss of flood peak and constructability operation, bore is not less than 4mm, and every sono-explorer is not more than 3m, all adopts snap joint to connect.
6) for water recovery apparatus to be a volume the be uncovered container of adding a cover of 30 ~ 50 liters, for conveying and the backflow of cooling water circulation.Basic structure is as Fig. 3, and container from top to bottom, is followed successively by water pump, flow gate valve, dividing plate, dividing plate is provided with five-way joint, returning pipe joint and has the hole passed through for pump power line and Flow-rate adjustment.
Based on a kind of continuous-tube butt welding cooling means of said apparatus, comprise the following steps:
The solid thermocouple wire of step one, point, thermocouple wire point being welded in tube surfaces needs to control, on the monitoring point of maximum heating temperature or high-temperature residence time, to play the effect of measuring tempeature in welding process; Select according to the external diameter of continuous-tube to be welded and install copper cooling block 1 supporting with it additional, copper cooling block 1 is not apart from pipe end distance to hinder welding operation to be advisable near groove as far as possible, and general control is at about 10 ~ 15mm;
Step 2, connecting line; Cooling block 1 is passed in and out water end (W.E.) be connected by plastic tube with water pump 2 and dividing plate 8, guarantee that water route is unimpeded;
Step 3, temperature measurement and control instrument 4 to be connected with thermocouple wire and flow regulator;
Step 4,30-50L water will be added for water recovery apparatus 6, guarantee the cooling effect of welding process Welded Joints;
Step 5, temperature adjusting, start welding, temperature measurement and control instrument 4 and water pump 2 be energized, make cooling device work, the present invention is that regulate and have 2 kinds of modes, one is manual preset mode by regulating the method for cooling block circulating water flow to realize the change within the specific limits of weld seam cooling velocity; Another kind is temperature feedback regulative mode, and manual preset mode is that before weldering or in welding process, mode manually carrys out adjust flux adjusting device 3 with controlled circulation discharge; The method is applicable to the mature and stable situation of continuous-tube welding procedure; Temperature feedback regulative mode is that the control point place set at continuous-tube HAZ carries out thermometric, with the maximum heating temperature at measuring point place or high-temperature residence time for sampled signal, the temperature signal recorded is converted to the signal of telecommunication and carrys out the adjustment that control flow check quantity regulating device 3 is able to controlled circulation discharge; By the control to measuring point Thermal Cycle, reach reduce welding heat affected zone width, reduce high-temperature residence time, slow down Grain growth trend and improve the object of property of welded joint.
Claims (2)
1. a continuous-tube butt welding cooling device, it is characterized in that, comprise water pump (2), water pump (2) is placed on and fills in confession water recovery apparatus (6) of enough water, pump outlet is connected with five-way joint (7) by pipeline, water pump water outlet pipeline is installed flow regulator (3), flow regulator (3) is connected with temperature measurement and control instrument (4), five-way joint (7) is fixed on dividing plate (8), 4 joints on five-way joint (7) top are connected with 4 cooling block back with water inlet line (5) respectively and are connected to two cooling blocks be oppositely arranged (1), each cooling block (1) forms by two semicircle matrixes (9), each semicircle matrix (9) is separately installed with 2 snap joints (10), is respectively entery and delivery port, 4 cooling block back with water inlet line (5) are connected with 2 semicircle matrixes of each cooling block by being fixed on the snap joint on two cooling blocks,
4 described cooling block return pipings (5) are connected to the delivery port of each semicircle matrix (9) of cooling block (1) and supply between water recovery apparatus, wherein one end is connected by snap joint (10) with two cooling blocks (1), and the other end is connected with the backwater joint be fixed on dividing plate (8);
Described cooling block (1) external form is a front end is the cylinder of frustum, wall thickness 10-20mm, each front end is that the cylinder of frustum is connected to form by hinge or loose-leaf (16) by two semicircle matrixes (9), cooling block (1) internal diameter is identical with welded continuous-tube external diameter, each semicircle matrix (9) inside is processed with 2 straight holes (13) and 1 annular groove (15), mutual UNICOM forms the circulating water channel of sealing, and straight hole (13) tail end is connected with water-in and water-out joint; The groove on circulating water channel top is bumped into ring-type bar shaped Copper fabrication cover plate (14) that is wide, uniform thickness and seals, ring-type bar shaped Copper fabrication cover plate one is longer, one shorter, when two semicircle matrixes fasten, the part that its cover plate grows will be inserted in the working groove of another semicircle matrix.
2. the cooling means of a kind of continuous-tube butt welding cooling device according to claim 1, comprises the following steps:
The solid thermocouple wire of step one, point, thermocouple wire point being welded in tube surfaces needs to control, on the monitoring point of maximum heating temperature or high-temperature residence time, to play the effect of measuring tempeature in welding process; Select according to the external diameter of continuous-tube to be welded and install copper cooling block (1) supporting with it additional, copper cooling block (1) distance pipe end distance is 10 ~ 15mm;
Step 2, connecting line; Cooling block (1) turnover water end (W.E.) is connected by plastic tube with water pump (2) and dividing plate (8), guarantees that water route is unimpeded;
Step 3, temperature measurement and control instrument (4) to be connected with thermocouple wire and flow regulator;
Step 4,30-50L water will be added for water recovery apparatus (6), guarantee the cooling effect of welding process Welded Joints;
Step 5, temperature adjusting, start welding, by temperature measurement and control instrument (4) and water pump (2) energising, makes cooling device work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264762.8A CN103350297B (en) | 2013-06-27 | 2013-06-27 | Cooling device and method for butt welding of coiled tubing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310264762.8A CN103350297B (en) | 2013-06-27 | 2013-06-27 | Cooling device and method for butt welding of coiled tubing |
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| CN103350297A CN103350297A (en) | 2013-10-16 |
| CN103350297B true CN103350297B (en) | 2015-05-13 |
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| CN104264208B (en) * | 2014-09-30 | 2017-05-24 | 任晓东 | Cooling mechanisms of electroplating device of jack |
| CN105750772B (en) * | 2016-04-28 | 2017-09-05 | 中国石油天然气第一建设有限公司 | A kind of welding bead interlayer temperature control device |
| CN111037159A (en) * | 2019-11-27 | 2020-04-21 | 合肥聚能电物理高技术开发有限公司 | Superconducting cable armor butt welding temperature control device and butt welding process |
| CN117066812B (en) * | 2023-10-17 | 2024-03-05 | 南通日旭重工科技有限公司 | Metal member welding device and welding process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08207138A (en) * | 1995-02-06 | 1996-08-13 | Nichirin:Kk | Method of welding piping cylinder |
| CN1748925A (en) * | 2005-10-14 | 2006-03-22 | 哈尔滨工业大学 | Water cooling jacket for titanium alloy tube ring seam by tungsten argon arc welding and seam following cooling welding method |
| CN101862884A (en) * | 2010-06-08 | 2010-10-20 | 西安石油大学 | Pipe-pipe site butt welding method of continuous pipes |
| CN201648461U (en) * | 2010-03-09 | 2010-11-24 | 杭州萧山江盛铸锻有限公司 | Circulating water temperature controlling system |
| CN102266872A (en) * | 2011-07-27 | 2011-12-07 | 中冶赛迪工程技术股份有限公司 | Steel tube cooling device |
| CN202945357U (en) * | 2012-12-14 | 2013-05-22 | 山东建筑大学 | Cooling device for environment-friendly tin-plating bath |
| CN203401231U (en) * | 2013-06-27 | 2014-01-22 | 西安石油大学 | Cooling device applied to continuous pipe butt welding |
-
2013
- 2013-06-27 CN CN201310264762.8A patent/CN103350297B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08207138A (en) * | 1995-02-06 | 1996-08-13 | Nichirin:Kk | Method of welding piping cylinder |
| CN1748925A (en) * | 2005-10-14 | 2006-03-22 | 哈尔滨工业大学 | Water cooling jacket for titanium alloy tube ring seam by tungsten argon arc welding and seam following cooling welding method |
| CN201648461U (en) * | 2010-03-09 | 2010-11-24 | 杭州萧山江盛铸锻有限公司 | Circulating water temperature controlling system |
| CN101862884A (en) * | 2010-06-08 | 2010-10-20 | 西安石油大学 | Pipe-pipe site butt welding method of continuous pipes |
| CN102266872A (en) * | 2011-07-27 | 2011-12-07 | 中冶赛迪工程技术股份有限公司 | Steel tube cooling device |
| CN202945357U (en) * | 2012-12-14 | 2013-05-22 | 山东建筑大学 | Cooling device for environment-friendly tin-plating bath |
| CN203401231U (en) * | 2013-06-27 | 2014-01-22 | 西安石油大学 | Cooling device applied to continuous pipe butt welding |
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