CN114193038A - Welding method for upper pipe and lower pipe - Google Patents
Welding method for upper pipe and lower pipe Download PDFInfo
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- CN114193038A CN114193038A CN202111630428.0A CN202111630428A CN114193038A CN 114193038 A CN114193038 A CN 114193038A CN 202111630428 A CN202111630428 A CN 202111630428A CN 114193038 A CN114193038 A CN 114193038A
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- 238000003466 welding Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004429 Calibre Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
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- 230000011218 segmentation Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
Abstract
The application discloses welding method of an upper pipe and a lower pipe, wherein the upper pipe comprises a first pipe section and a second pipe section, and the welding method comprises the following steps: firstly, welding the first pipe section and the second pipe section in the horizontal direction to form the upper pipe; then hoisting the upper pipe onto the lower pipe so that the upper pipe is vertically aligned with the lower pipe; and finally, welding the upper pipe and the lower pipe in the vertical direction. The method disclosed by the application is simple to operate, and the verticality deviation between the upper pipe and the lower pipe can be effectively reduced.
Description
Technical Field
The application relates to the technical field of welding, in particular to a welding method for an upper pipe and a lower pipe.
Background
When the large-diameter long pipe is hoisted and lowered into a well, the verticality of the large-diameter long pipe increases the difficulty of subsequent construction work due to overlarge deviation and influences the installation of the next process, so that the verticality control of the large-diameter long pipe is indispensable and the like.
Disclosure of Invention
In view of the above, embodiments of the present application are expected to provide a method for welding an upper pipe and a lower pipe to solve the problem of large verticality deviation between the upper pipe and the lower pipe.
In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:
the embodiment of the application discloses a welding method for an upper pipe and a lower pipe, wherein the upper pipe comprises a first pipe section and a second pipe section, and the welding method comprises the following steps:
welding the first pipe section and the second pipe section in the horizontal direction to form the upper pipe;
hoisting the upper pipe onto the lower pipe such that the upper pipe is vertically aligned with the lower pipe;
welding the upper pipe and the lower pipe in a vertical direction.
Further, the step of welding the first pipe section and the second pipe section in a horizontal direction to form the upper pipe includes:
arranging the first pipe section and the second pipe section at equal height in the horizontal direction, and adjusting the team clearance;
performing a plurality of sets of alignment tests on the first and second pipe sections;
and analyzing multiple groups of alignment data, and selecting the group of the optimal alignment data to weld at the position.
Further, the step of arranging the first pipe section and the second pipe section at equal heights in the horizontal direction and adjusting the team clearance comprises:
arranging a plurality of roller frames to enable the supporting parts of the roller frames to keep equal horizontal height;
hoisting the first pipe section and the second pipe section to different roller frames;
and adjusting the team clearance of the first pipe section and the second pipe section to meet the preset requirement.
Further, the step of performing a plurality of sets of alignment tests on the first and second pipe segments comprises:
mounting a laser collimator on the first pipe section;
mounting a receiving target on the second tube segment;
and asynchronously rotating the first pipe section and the second pipe section to acquire a plurality of sets of alignment data.
Further, the step of asynchronously rotating the first and second pipe segments to obtain sets of alignment data includes:
holding the first pipe section in an initial position;
rotating the second pipe section around the axial direction to be located at N different equal angles to obtain N pieces of alignment data relative to the first pipe section at the initial position, wherein N is a natural number;
rotating the first pipe section around the axial direction to increase 2 pi/N radian and then keeping the first pipe section still;
rotating the second pipe section around the axial direction to be positioned at N different equal angles so as to acquire N alignment data relative to the first pipe section at positions increased by 2 pi/N radians;
and after each first pipe section is axially rotated by one 2 pi/N radian, the first pipe section is kept still, and the second pipe section is correspondingly axially rotated to be positioned at N different equal angles so as to acquire multiple groups of alignment data.
Further, N is equal to 4 or 5.
Further, the step of hoisting the upper pipe onto the lower pipe with the upper pipe vertically aligned with the lower pipe comprises:
a plurality of line pendants are arranged on the upper pipe in the circumferential direction;
rotating the upper pipe around the axial direction by M different equal angles to obtain M groups of verticality data, wherein M is a natural number;
and analyzing M groups of verticality data, and selecting the group pairing position where the optimal verticality data is located.
Further, M is equal to 4 or 5.
Further, when the group where the optimal perpendicularity data is located is selected to weld the position, the plumb bob is adopted to monitor the perpendicularity change in real time, and the position with larger perpendicularity deviation is corrected in time.
Further, the welding of the first pipe section and the second pipe section adopts layered and segmented welding.
The embodiment of the application discloses welding method of upper tube and low tube, be applicable to the segmentation welding of heavy-calibre long tube, form the upper tube through welding first pipeline section and second pipeline section in the horizontal direction, then hoist the upper tube to the low tube on to make upper tube and low tube vertically aim at, weld upper tube and low tube in vertical direction at last, through welding in level and vertical two directions, can effectively reduce the straightness deviation that hangs down between upper tube and the low tube.
Drawings
FIG. 1 is a schematic flow chart of a method for welding an upper pipe and a lower pipe according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of a crane lifting an upper pipe to a lower pipe;
FIG. 3 is a schematic diagram of a laser collimator measuring first and second tube segments;
fig. 4 is a schematic flowchart of another welding method for an upper pipe and a lower pipe according to an embodiment of the present disclosure.
Description of the reference numerals
An upper pipe 1; a first pipe section 11; a second tube section 12; a lower tube 2; a pairing position 3; a laser collimator 4; a receiving target 5; a clamp 6; a wire pendant 7; a crane 8; a hook 81.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
The present application will be described in further detail with reference to the following drawings and specific embodiments. The descriptions of "first," "second," etc. in the embodiments of the present application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly including at least one feature. In the description of the embodiments of the present application, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Because the large-diameter long pipe is composed of a plurality of pipe sections, when the large-diameter long pipe is hoisted and lowered into a well, the subsequent construction difficulty is not increased due to overlarge deviation in order to ensure that the verticality of the large-diameter long pipe cannot influence the next process installation, so that the verticality between each pipe section of the large-diameter long pipe is indispensable.
In view of the above, the present embodiment provides a method for welding an upper pipe and a lower pipe, referring to fig. 1, the upper pipe 1 includes a first pipe segment 11 and a second pipe segment 12, and the welding method includes:
s1, welding the first pipe section 11 and the second pipe section 12 in the horizontal direction to form an upper pipe 1;
s2, hoisting the upper pipe 1 to the lower pipe 2, and vertically aligning the upper pipe 1 and the lower pipe 2;
and S3, welding the upper pipe 1 and the lower pipe 2 in the vertical direction.
It should be understood that the number of the upper pipe 1 and the lower pipe 2 is not limited, and may be two, or may be multiple, that is, the upper pipe 1 and the lower pipe 2 are not only two pipes, but are only two pipes as the operation object in the installation, and according to the same method, they may be spliced in sequence. For example, when the pipeline has three sections, when the third section of pipe is installed, the former upper pipe 1 becomes the lower pipe 2, the third section of pipe becomes the upper pipe 1, and the pipe is installed section by section until the engineering requirement is met.
It will be appreciated that the number of segmented pipe sections of the upper and lower pipes 1, 2 is also not limited for the same reasons as described above. For example, the upper pipe 1 may be formed by welding two 12m steel pipes into a long pipe of 24m in a horizontal state, then turning the 24m upper pipe 1 from the horizontal state to the vertical state, then hoisting the pipe to another 24m lower pipe 2 which is already partially lowered into the well, and finally performing the assembly welding work in the vertical direction.
It can be understood that, in order to adapt to the welding of a large-caliber long pipe, the application mainly considers the welding in the horizontal direction and the vertical direction: the method comprises the following steps that firstly, the verticality deviation degree is small when a long pipe is welded in the horizontal direction, and when welding is performed in a vertically downward alignment mode, the upper pipe 1 slightly swings due to a hoisted cantilever, so that the difficulty of butt joint control is increased, and the phenomenon of increased verticality deviation can occur when the upper pipe 1 and the lower pipe 2 are welded in an alignment mode; second, cost and construction degree of difficulty problem, if all adopt to weld on the horizontal direction, because can increase substantially trun into the degree of difficulty of vertical direction with the long tube by the level, if go up pipe 1 very long, often need then increase the height of hoist and mount, can greatly increase the hoist and mount cost. Therefore, the first pipe section 11 and the second pipe section 12 are welded in the horizontal direction, and then turned to be welded in the vertical direction.
Tools that may be used in the following embodiments include a lift roller carriage, a laser collimator 4, a receiving target 5, a clamp 6, a line pendant 7, a square, a crane 8, and a hook 81; however, the present application is not limited to such tools, and other tools may be used within the scope of the welding method of the above embodiments.
In one embodiment, the step S1 is as follows: welding the first pipe section 11 and the first pipe section 11 in the horizontal direction to form the upper pipe 1 comprises the following steps:
s11, arranging the first pipe section 11 and the second pipe section 12 in a horizontal equal-height mode, and adjusting the pairing gap;
s12, carrying out multiple sets of alignment tests on the first pipe section 11 and the second pipe section 12;
and S13, analyzing multiple groups of alignment data, and selecting the group where the optimal alignment data is located to weld at the position 3.
It will be appreciated that the reason for the contour setting described herein is: the end surfaces of the first pipe section 11 and the second pipe section 12 are aligned, so that the assembly gap between the end surfaces of the first pipe section and the second pipe section can be conveniently adjusted, and the verticality deviation is reduced.
It will be appreciated that the reason for performing multiple sets of alignment tests is: because the long pipes have some problems such as fine defects during the manufacturing process, it is essentially impossible to determine whether the end faces of the long pipes are aligned, and only the position alignment with the smallest error amount between the first pipe section 11 and the second pipe section 12 can be found.
In the embodiment, the first pipe section 11 and the second pipe section 12 are arranged in equal height in the horizontal direction, so that the end surfaces of the first pipe section and the second pipe section are aligned conveniently, and the error variable between the end surfaces is reduced; multiple sets of alignment tests are used to facilitate finding the optimal pairing position 3, reducing the perpendicularity deviation between the first pipe section 11 and the second pipe section 12.
In one embodiment, the first pipe segment 11 and the second pipe segment 12 may be welded in a layered and segmented manner to improve vertical accuracy.
In one embodiment, the step S11 is as follows: the first pipe section 11 and the second pipe section 12 are arranged in equal height in the horizontal direction, and the pairing gap is adjusted, and the method comprises the following steps:
s111, arranging a plurality of roller frames to enable the supporting parts of the roller frames to keep equal horizontal heights;
s112, hoisting the first pipe section 11 and the second pipe section 12 to different roller frames;
s113, adjusting the pairing gap between the first pipe section 11 and the first pipe section 11 to meet the preset requirement.
For example, an open field can be selected on site, four roller frames are arranged in a straight line shape at proper positions according to a first pipe section 11 of 12m and a second pipe section 12 of 12m which arrive on the field, the supporting parts of the roller frames are required to be kept at equal horizontal heights, then the first pipe section 11 and the second pipe section 12 are respectively placed on the two roller frames by the crane 8, and the pairing gap between the first pipe section 11 and the second pipe section 12 is adjusted to reach the preset requirement by moving the roller frames.
It is understood that the pairing gap herein refers to the distance between the end faces of the first pipe segment 11 and the second pipe segment 12 that are close to each other.
In the present embodiment, the first pipe segment 11 and the second pipe segment 12 are supported by a plurality of roller frame supports, and then the roller frames are moved to adjust the pairing gap between the first pipe segment 11 and the second pipe segment 12, so as to prepare for the subsequent alignment test and welding.
In one embodiment, the step S12 is as follows: performing multiple sets of alignment tests on the first and second pipe segments 11, 12, comprising:
s121, mounting a laser collimator 4 on the first pipe section 11;
s122, mounting the receiving target 5 on the second pipe section 12;
s123, asynchronously rotating the first pipe section 11 and the second pipe section 12 to obtain multiple sets of alignment data.
For example, the model of the laser collimator 4 may be selected from READ15, the laser collimator 4 may be installed on the side of the first pipe segment 11 away from the group pair gap, the receiving target 5 is installed on the side of the second pipe segment 12 away from the group pair gap, and then the first pipe segment 11 and the second pipe segment 12 are asynchronously rotated to obtain multiple sets of alignment data.
It will be understood that asynchronous rotation of the first pipe section 11 and the second pipe section 12 means that the first pipe section 11 is rotated and then the second pipe section 12 is rotated, i.e. the two are not rotated simultaneously with intermittent time. For example, after a process is performed on the first pipe segment 11, a plurality of processes are subsequently performed on the second pipe segment 12, and the process is repeated in a loop to obtain a plurality of sets of data.
In an embodiment, the step S123: asynchronously rotating the first pipe segment 11 and the second pipe segment 12 to acquire sets of alignment data, comprising:
s1231, keeping the first pipe section 11 in an initial position;
s1232, rotating the second pipe section 12 around the axial direction to be located at N different equal angles to obtain N alignment data relative to the first pipe section 11 at the initial position, wherein N is a natural number;
s1233, rotating the first pipe section 11 around the axial direction, increasing 2 pi/N radians, and keeping the first pipe section stationary;
s1234, rotating the second pipe section 12 around the axial direction to be located at N different equal angles to obtain N alignment data relative to the first pipe section 11 at positions where 2 pi/N radians are added;
s1235, after increasing one 2 pi/N radian every time the first pipe section 11 rotates axially, keeping the first pipe section stationary, and correspondingly rotating the second pipe section 12 around the axial direction to be positioned at N different equal angles so as to acquire multiple groups of alignment data.
In particular, the first pipe section 11 can be fixed on a roller carriage on which the laser collimator 4 is mounted, taking this position as the initial position noted 0 °, and then the second pipe section 12 can be rotated at N equal angles, N being equal to 4 or 5. For example, when N is equal to 4, the second pipe segment 12 is rotated in the axial direction to be located at 4 different equal angles, which are 0 °, 90 °, 180 °, and 270 °, respectively, and after being measured by the laser collimator 4, the alignment data of the second pipe segment in the initial position relative to the first pipe segment 11 is recorded as (0 °, 90 °, 180 °, and 270 °); then, the first pipe section 11 is axially rotated in a certain direction to be positioned at 90 degrees and then fixed, the second pipe section 12 is axially rotated again to be positioned at 4 different equal angles, after the measurement is respectively carried out by the laser collimator 4, the alignment position of the first pipe section 11 at 90 degrees relative to the first pipe section is recorded as (90 degrees, 0 degrees, 90 degrees, 180 degrees and 270 degrees); then, after each 90 ° increase in the axial rotation of the first tube segment 11, the second tube segment 12 is correspondingly rotated in the axial direction at 4 different equal angles until the alignment data (180 °, 0 °, 90 °, 180 °, 270 °) and (270 °, 0 °, 90 °, 180 °, 270 °) are obtained.
It can be understood that the receiving target 5 is installed in two ways, one way is that the receiving target 5 is installed after the second pipe section 12 is rotated for one angle along the axial direction, the receiving target 5 is removed after the measurement is completed, and the receiving target 5 is installed after the next angle is rotated; secondly, after the number of the rotation angles is determined, a plurality of receiving targets 5 are installed at one time, for example, after 4 rotation angles are determined, one receiving target 5 is directly installed on each of the 4 angles of the second pipe section 12.
Note that 2 pi is 360 ° in conversion of radian into angle.
In the embodiment, multiple sets of data are obtained by rotating the first pipe section 11 and the second pipe section 12 at different angles, so that the optimal pairing position 3 is obtained, the error variable between the end surfaces of the first pipe section 11 and the second pipe section 12 can be reduced, and the verticality deviation can be reduced.
In one embodiment, the step S2 is as follows: hoist and mount upper tube 1 to down pipe 2 on, make upper tube 1 and 2 vertical alignments of down pipe, include:
s21, installing a plurality of line pendants 7 on the upper pipe 1;
s22, rotating the upper pipe 1 around the axial direction by M different equal angles to obtain M groups of verticality data, wherein M is a natural number;
and S23, analyzing M groups of verticality data, and selecting the group in which the optimal verticality data is located to form a position 3.
Specifically, a clamp 6 can be installed on the upper pipe 1 for clamping the upper pipe 1 for facilitating hoisting. 4 line weight 7 can be installed around anchor clamps 6, is separated by 90 between every line weight 7, and line weight 7 is perpendicularly transferred to ground or platform face 100mm from anchor clamps 6 outer edgewise face, then notes this position as initial position, marks as 0, uses the square to measure the horizontal distance between four line weight 7 and upper tube 1 and lower tube 2 respectively, calculates the distance difference between the two and as the straightness data that hangs down. Rotating upper tube 1 by M different equal angles around the axial direction, where M may be equal to 4 or 5, for example, when M is equal to 4, rotating upper tube 1 by 4 different equal angles around the axial direction, that is, 0 °, 90 °, 180 °, and 270 °, to obtain 4 sets of perpendicularity data, and selecting the set of position 3 where the optimal perpendicularity data is located.
It can be understood that the plumb 7 herein has two functions, i.e. adjusting the verticality of the upper pipe 1, taking a plumb 7 as an example, in the vertical direction, using a square ruler to measure the horizontal distance between two points on the upper pipe 1 and the plumb 7, which are separated by a preset height, then calculating the verticality according to the difference between the two distances, and then adjusting the hook 81 of the crane 8 so that the upper pipe 1 is in the vertical state. Two, confirm top tube 1 and 2 best group of low tube to position 3, treat top tube 1 perpendicular back, rethread right angle square measures the horizontal distance between line weight 7 and top tube 1 and low tube 2 respectively, calculate the difference between both distance values, through removing hoist 8, adjust top tube 1 position, make to go up to carry out the prealignment between top tube 1 and the low tube 2, then along the different angles of axial rotation top tube 1, measure the horizontal distance difference between top tube 1 and low tube 2 and the line weight 7 respectively, the straightness data of hanging down under the different angles of analysis, in order to obtain top tube 1 and the best group of low tube 2 to position 3.
It can be understood that, because the lower pipe 2 has been fixed at the wellhead by the clamp 6, the verticality has been considered during installation of the lower pipe 2 to meet the preset requirements, so that adjustment is not required, and only the measurement of the verticality of the upper pipe 1 needs to be considered.
It can be understood that the roundness of the outer edge surface of the clamp 6 is required to reduce the measurement error caused by the offset of the plummet 7.
This embodiment is through installing a plurality of lines on top tube 1 and weigh down 7, then with top tube 1 around the impartial angle of axial rotation M difference to acquire M group's straightness data that hangs down, the last analysis straightness data that hangs down selects the group at optimum straightness data place to weld position 3, can reduce the mistake variable between top tube 1 and low tube 2 when the welding, and then reduces the accumulation of the straightness deviation that hangs down between top tube 1 and the low tube 2.
In one embodiment, when the group in which the optimal perpendicularity data is located is selected to the position 3, the plumb bob 7 is adopted to monitor the perpendicularity change in real time, and the position with larger perpendicularity deviation is corrected in time so as to reduce the accumulation of the perpendicularity deviation.
An exemplary method for welding an upper pipe 1 and a lower pipe 2 provided in the embodiments of the present application will be described below, with reference to fig. 4, which includes:
s111, arranging a plurality of roller frames to enable the supporting parts of the roller frames to keep equal horizontal heights;
s112, hoisting the first pipe section 11 and the second pipe section 12 to different roller frames;
s113, adjusting the pairing gap between the first pipe section 11 and the first pipe section 11 to meet a preset requirement;
s121, mounting a laser collimator 4 on the first pipe section 11;
s122, mounting the receiving target 5 on the second pipe section 12;
s1231, keeping the first pipe section 11 in an initial position;
s1232, rotating the second pipe section 12 around the axial direction to be located at N different equal angles to obtain N alignment data relative to the first pipe section 11 at the initial position, wherein N is a natural number;
s1233, rotating the first pipe section 11 around the axial direction, increasing 2 pi/N radians, and keeping the first pipe section stationary;
s1234, rotating the second pipe section 12 around the axial direction to be located at N different equal angles to obtain N alignment data relative to the first pipe section 11 at positions where 2 pi/N radians are added;
s1235, after increasing one 2 pi/N radian every time the first pipe section 11 rotates around the axial direction, keeping the first pipe section stationary, and correspondingly rotating the second pipe section 12 around the axial direction to be positioned at N different equal angles to obtain a plurality of groups of alignment data;
s13, analyzing a plurality of groups of alignment data, and selecting the group in which the optimal alignment data is located to weld the position 3;
s21, installing a plurality of line pendants 7 on the upper pipe 1;
s22, rotating the upper pipe 1 around the axial direction by M different equal angles to obtain M groups of verticality data, wherein M is a natural number;
s23, analyzing M groups of verticality data, and selecting a group at which the optimal verticality data is located to form a position 3;
and S3, welding the upper pipe 1 and the lower pipe 2 in the vertical direction.
The above description is only a preferred embodiment of the present application, and is not intended to limit the present application, and it is obvious to those skilled in the art that various modifications and variations can be made in the present application. All changes, equivalents, modifications and the like which come within the spirit and principle of the application are intended to be embraced therein.
Claims (10)
1. A method of welding an upper tubular and a lower tubular, the upper tubular comprising a first tubular segment and a second tubular segment, the method comprising:
welding the first pipe section and the second pipe section in the horizontal direction to form the upper pipe;
hoisting the upper pipe onto the lower pipe such that the upper pipe is vertically aligned with the lower pipe;
welding the upper pipe and the lower pipe in a vertical direction.
2. The welding method of claim 1, wherein the step of welding the first tube segment to the second tube segment in a horizontal orientation to form the upper tube comprises:
arranging the first pipe section and the second pipe section at equal height in the horizontal direction, and adjusting the team clearance;
performing a plurality of sets of alignment tests on the first and second pipe sections;
and analyzing multiple groups of alignment data, and selecting the group of the optimal alignment data to weld at the position.
3. The welding method of claim 2, wherein said step of providing said first and second pipe sections at equal heights in a horizontal direction and adjusting said team gap comprises:
arranging a plurality of roller frames to enable the supporting parts of the roller frames to keep equal horizontal height;
hoisting the first pipe section and the second pipe section to different roller frames;
and adjusting the team clearance of the first pipe section and the second pipe section to meet the preset requirement.
4. The welding method of claim 2, wherein the step of performing a plurality of sets of alignment tests on the first and second pipe segments comprises:
mounting a laser collimator on the first pipe section;
mounting a receiving target on the second tube segment;
and asynchronously rotating the first pipe section and the second pipe section to acquire a plurality of sets of alignment data.
5. The welding method of claim 4, wherein the step of asynchronously rotating the first and second pipe segments to obtain multiple sets of alignment data comprises:
holding the first pipe section in an initial position;
rotating the second pipe section around the axial direction to be located at N different equal angles to obtain N pieces of alignment data relative to the first pipe section at the initial position, wherein N is a natural number;
rotating the first pipe section around the axial direction to increase 2 pi/N radian and then keeping the first pipe section still;
rotating the second pipe section around the axial direction to be positioned at N different equal angles so as to acquire N alignment data relative to the first pipe section at positions increased by 2 pi/N radians;
and after each first pipe section is axially rotated by one 2 pi/N radian, the first pipe section is kept still, and the second pipe section is correspondingly axially rotated to be positioned at N different equal angles so as to acquire multiple groups of alignment data.
6. Welding method according to claim 5, characterised in that N is equal to 4 or 5.
7. The welding method of claim 1, wherein the step of hoisting the upper tube onto the lower tube to vertically align the upper tube with the lower tube comprises:
a plurality of line pendants are arranged on the upper pipe in the circumferential direction;
rotating the upper pipe around the axial direction by M different equal angles to obtain M groups of verticality data, wherein M is a natural number;
and analyzing M groups of verticality data, and selecting the group pairing position where the optimal verticality data is located.
8. Welding method according to claim 7, wherein M is equal to 4 or 5.
9. The welding method according to claim 7, wherein when the group where the optimal perpendicularity data is located is selected to weld the positions, the plumb bob is used for monitoring the change of perpendicularity in real time, and the positions with larger perpendicularity deviation are corrected in time.
10. The welding method of claim 1, wherein the welding of the first pipe segment and the second pipe segment is a layered, segmented welding.
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| CN202111630428.0A CN114193038A (en) | 2021-12-28 | 2021-12-28 | Welding method for upper pipe and lower pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114955858A (en) * | 2022-04-06 | 2022-08-30 | 中国原子能科学研究院 | Method and apparatus for downhole installation of tubing |
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| CN110740834A (en) * | 2017-02-20 | 2020-01-31 | 创新焊接解决方案有限公司 | Apparatus and method for joining metal tubular members for drilling |
| CN209369174U (en) * | 2018-10-19 | 2019-09-10 | 一科能源科技（天津）有限公司 | A kind of column welding structure and weld mold |
| CN111215825A (en) * | 2020-03-13 | 2020-06-02 | 中国水利水电夹江水工机械有限公司 | Automatic adjustment control method for butt welding centering of barrel |
| CN112518226A (en) * | 2020-12-18 | 2021-03-19 | 上海前山管道技术有限公司 | Intelligent flange-pipe assembling and welding system |
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| CN114955858A (en) * | 2022-04-06 | 2022-08-30 | 中国原子能科学研究院 | Method and apparatus for downhole installation of tubing |
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