WO2018072584A1 - 一种自升式钻井平台悬臂梁推拉架建造技术 - Google Patents

一种自升式钻井平台悬臂梁推拉架建造技术 Download PDF

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WO2018072584A1
WO2018072584A1 PCT/CN2017/102506 CN2017102506W WO2018072584A1 WO 2018072584 A1 WO2018072584 A1 WO 2018072584A1 CN 2017102506 W CN2017102506 W CN 2017102506W WO 2018072584 A1 WO2018072584 A1 WO 2018072584A1
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row
web
cantilever beam
main board
requirements
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PCT/CN2017/102506
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English (en)
French (fr)
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林海桥
曹凤丽
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南通振华重型装备制造有限公司
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Publication of WO2018072584A1 publication Critical patent/WO2018072584A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

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  • the invention relates to the technical field of drilling platforms, in particular to a construction technology of a cantilever beam push-pull frame of a jack-up drilling platform.
  • the hydraulic mechanism pushes and pulls the push-pull frame on the cantilever beam through the pin inserted into the pin hole to realize the extension and retraction of the cantilever beam.
  • the precision of the push-pull frame not only affects the reliability of the extension and retraction process of the cantilever beam, but also affects whether the hydraulic push-pull mechanism can be installed smoothly.
  • Push-pull frame is an important structure of cantilever beam. Its construction precision is strict. The tolerance of the hole diameter is ⁇ 1mm, the height position tolerance is ⁇ 1mm, the single and overall hole spacing is ⁇ 1mm, and the positioning tolerance is also ⁇ 1mm.
  • the prior art is boring in the outer field after being integrally closed, which is extremely inconvenient to process, consumes a lot of manpower and material resources, and has high cost.
  • the technical problem to be solved by the present invention is to provide a construction process of a cantilever beam push-pull frame of a jack-up drilling platform in a shop.
  • the technical solution of the present invention is: a construction technology of a cantilever beam push-pull frame of a jack-up drilling platform, the innovation of which is: firstly, the push-pull frame is divided into a plurality of sections T, and is fabricated, including processing pin holes, The T row is a T-shaped plate member composed of a main plate and a web perpendicular to the main plate, and then the completed T rows are integrally closed at the cantilever beam loading site.
  • T-row production steps are as follows:
  • Material preparation processing the main board and the web, leaving a margin in the long axis and the diameter of the pin hole;
  • T-row production Place the processed main board on the horizontal tire frame, adjust its straightness to meet the requirements, and then fix it with the card code; draw the web mounting line on the main board and install the corresponding web Adjust the verticality of the web and the main board to meet the requirements, then spot welding to form a T row, then install the craft ribs between the sides of the web and the main board, and then from the middle to the ends, along the web and the main board Weld joint welding, and symmetrically alternate welding on both sides of the weld; according to the above steps, make the T row of the third section, the middle section and the middle section;
  • Processing bolt hole Place the T row on the workbench of the floor boring and milling machine, adjust the straightness of the component and the perpendicularity with the machine tool spindle, and draw the center line of the bolt hole according to the hole margin and hole spacing requirements. , processing the line, and then the diameter of the bolt hole to the drawing requirements.
  • the specific step of the integral folding is: transporting the processed T row to the cantilever beam loading site; according to the distance between the most sturdy and the most sturdy pin hole and the well core line, positioning the two rows of ⁇ and T Adjust the height of the T row until it meets the requirements; then position the middle T row and adjust its height until it meets the requirements.
  • the butt welds of the main plate and the web are welded by positive and negative alternate welding; the T-shaped welds of the web and the cantilever beam are used in the T-shaped welds from the middle to the opposite ends, and the method of anti-symmetric welding is used.
  • the two or two butt joints are used to form the main board or the web, and the components have a margin in the diameter direction of the long axis, the short axis and the pin hole; when welding, one side is first grounded and the other side is welded. The side is further cleaned and welded, and finally the weld of the remaining part of the side is welded; in the case where the directness and the flatness are both satisfactory, the allowance in the short-axis direction of the member is processed, and the web groove is cut. .
  • the remaining amount of the T-segment of the two sections of the ⁇ and ⁇ can be repaired according to the theoretical size, and the groove is opened.
  • FIG. 1 is a schematic view of the main board blanking of a cantilever beam push-pull construction technology of a jack-up drilling platform according to the present invention.
  • FIG. 2 is a schematic view of web blanking of a cantilever beam push-pull construction technology of a jack-up drilling platform according to the present invention.
  • FIG. 3 is a schematic view of a T-row of a construction technology of a cantilever beam push-pull frame of a jack-up drilling platform according to the present invention.
  • FIG. 4 is a schematic view showing the positioning of the push-pull frame of the cantilever beam push-pull construction technology of the jack-up drilling platform of the present invention.
  • the invention discloses a construction technology of a cantilever beam push-pull frame for a jack-up drilling platform, the main steps of which are as follows:
  • (1)Material preparation Main board 1 and web 3 of CNC cutting push-pull frame, at the length of the length of the closed joint, add 8mm margin on one side, add 30mm margin at the T-slot closing; width direction , add 10mm margin on one side; insert the hole 2 in the radial direction, and add 27mm balance. As shown in Figure 1, Figure 2.
  • T-row production Place the processed main board 1 on the horizontal tire frame, adjust its straightness to meet the requirements, and then fix it with the card code. Draw the web mounting line on the main board 1, install the corresponding web 3, adjust the verticality of the web 3 and the main board 1 until it meets the requirements, and then fix it by spot welding to form a T-shaped section (T row), as shown in Fig. 3. Shown. The process ribs are then installed to secure the webs 3. Welding according to the method of symmetrical alternating welding on both sides of the weld from the middle to the both ends.
  • the push-pull frame Since the push-pull frame is about 40 meters long and weighs about 36T, it can only be divided into several sections due to the limitation of steel plate specifications and material utilization requirements. Considering that it is necessary to reduce the workload of the external situation and reduce the difficulty of the work, the components are lengthened into three sections and made into a T-row. In this way, the existing tools can be used for normal transport hoisting, and the existing machine tool milling and boring can be fully utilized to improve the production quality. After being divided into 3 sections, the aperture, hole pitch and hole margin of each section can be controlled within the requirements, and the length of the T row can also be precisely controlled. In the case of external situations, although the hole spacing at the closing opening is affected by the positioning error and the length of the T row, the size of the closing can be ensured as long as the above two factors are strictly controlled.
  • the steel plate is added with a margin in the length, the width, and the radial direction of the pin hole 2, and is arranged to be removed when the main board 1 is lengthened, the T row is processed, and the outer surface is closed. If the margin is not left, the poor cutting quality of the flame cutting machine cannot guarantee the length and width dimensions and straightness of the components when the material is cut. At the same time, the production of the remaining process is extremely demanding, and the implementation is difficult, and the quality of the production is difficult to guarantee. Therefore, if the amount of material is increased, the amount of material used is increased, and the machining process is increased, but the quality of production can be fully guaranteed.
  • the remaining amount of the T-segment of the two sections of the ⁇ and ⁇ can be repaired according to the theoretical size, and the slit is opened.
  • the remaining amount of the middle T row needs to be maintained.
  • the length of the two rows of T-rows can be removed in the workshop to reduce the workload of the field. Retaining the length of the middle row T row can compensate for the change of the hole distance at the closing mouth caused by the positioning error of the outer field T row.
  • step (5) the T rows at both ends of the crucible and the crucible are first positioned, and then the T row in the middle section is trimmed and positioned.
  • the length of the push-pull frame and the distance from the well core line 4 are guaranteed to meet the drawing requirements.
  • the control of the plug-type high-strength steel push-pull frame construction is gradual and mutually influential; if the straightness of the main board 1 is long after processing, the straightness of the center of the hole when the subsequent boring is affected; the straightness of the single T-line straightness
  • the control can affect the overall straightness of the push-pull frame; the hole pitch of the first T-row hole will also affect the hole distance at the closing position of the push-pull frame; the positioning error of the T-row of the two sections of ⁇ and ⁇ affects the length and installation position of the middle T-row .

Abstract

一种自升式钻井平台悬臂梁推拉架建造方法，步骤如下：(1)、材料准备：数控下料；在长度、宽度、插销孔半径方向都加放余量；(2)、主板(1)、腹板(3)接长：将构件两两对接，形成艏、中、艉三段；然后将构件宽度方向的余量加工掉，并切制腹板坡口；(3)、T排制作：将主板(1)与腹板(3)装配在一起，形成T排组件；(4)、加工插销孔(2)：画出插销孔(2)的中心线、加工线，将该插销孔(2)直径镗至图纸要求；(5)、外场合拢：根据推拉架与井心线(4)的距离要求，先定艏、艉两段T排，然后测量艏、艉两端T排间距，将距离均分到中段T排上，然后定位中段T排。该建造方法能够保证推拉架满足各项建造要求，同时能够提高建造效率，降低建造成本。

Description

一种自升式钻井平台悬臂梁推拉架建造技术 一种自升式钻井平台悬臂梁推拉架建造技术
技术领域
本发明涉及一种钻井平台技术领域，特别涉及一种自升式钻井平台悬臂梁推拉架建造技术。
背景技术
随着社会的发展和科技的进步，人类对于能源的需求也越来越大。海洋石油钻井平台建造数量越来越多，悬臂梁式钻井平台由于可以在一个位置进行多口丛式井的钻探而备受欢迎。
液压机构通过插入插销孔内的插销推拉悬臂梁上的推拉架，实现悬臂梁的伸出、缩回动作。推拉架的制作精度，不仅影响悬臂梁的伸出缩回过程的可靠性，也影响着能否顺利安装液压推拉机构。推拉架作为悬臂梁的重要结构，其建造精度要求严格，插销孔直径公差为±1mm，高度位置公差在±1mm，单个及整体孔间距均为±1mm，定位公差也为±1mm。现有技术为整体合拢后在外场进行镗孔，加工起来极为不便，耗费大量人力物力，成本较高。
发明内容
本发明要解决的技术问题是提供一种车间内镗孔的自升式钻井平台悬臂梁推拉架建造工艺。
为解决上述技术问题，本发明的技术方案为：一种自升式钻井平台悬臂梁推拉架建造技术，其创新点在于：首先将推拉架分成若干段T排，并制作，包括加工插销孔，所述T排为由主板及垂直于主板的腹板组成的截面为T型的板件，然后将制作完成的各T排在悬臂梁搭载现场整体合拢。
进一步的，所述T排制作步骤具体如下：
（1）材料准备：加工主板、腹板，在其长轴、插销孔直径方向都留有余量；
（2）T排制作：将加工好后的主板放置在水平胎架上，调整其直线度至符合要求，然后用卡码固定；在主板上划出腹板安装线，并安装对应的腹板；调整腹板与主板的垂直度至符合要求，随即点焊固定，形成T排，然后在腹板两侧与主板之间分别安装工艺筋板，然后自中间向两端，沿腹板与主板间焊缝焊接，并在焊缝两侧对称交替焊接；按上述步骤制作艏段、中段、艉段三段T排；
（3）加工插销孔：将T排立放在落地镗铣床的工作台上，调整构件的直线度及与机床主轴的垂直度，根据孔边距、孔距要求，画出插销孔的中心线、加工线，然后将插销孔直径镗至图纸要求。
进一步的，所述整体合拢的具体步骤为：将加工后的T排运输至悬臂梁搭载现场；根据最艏、最艉的插销孔与井心线的距离要求，定位艏、艉两段T排，调整T排高度直至符合要求；然后定位中段T排，调整其高度，直至符合要求。主板、腹板的对接焊缝都采用正反交替焊接的方法；腹板与悬臂梁大立板的T形焊缝，采用自中间向两端，正反对称交替焊接的方法。
进一步的，加工主板、腹板时，采用构件两两对接焊接组成主板或腹板，构件在长轴、短轴和插销孔直径方向都留有余量；焊接时一侧先打底焊接，另一侧再进行清根焊接，最后再焊一侧剩余部分的焊缝；在其直接度和平面度均符合要求的情况下，将构件短轴方向的余量加工掉，并切制腹板坡口。
进一步的，在T排制作完成后，就可以按理论尺寸将艏、艉两段的T排合拢口处余量修除，并开制坡口。
进一步的，定位艏、艉两段T排后，测量艏、艉两端T排合拢口处的间距，将距离均分到中段T排上，修除合拢口处余量，并开制坡口，然后定位中段T排，调整其高度，直至符合要求。
本发明的优点在于：
（1）插销孔的直径、孔边距、孔距得到了保证；在T排制作完成后，就安排使用重型落地镗铣床在车间内加工插销孔，不仅容易保证插销孔的孔径、孔边距及孔距误差符合图纸要求，而且相比于外场合拢后整体镗孔，减少了加工成本及加工时间；实际制作证实：在车间镗孔后，插销孔的孔径、孔边距、孔间距误差都控制在了±0.5mm之内，单根T排加工时间只需3天。
（2）T排制作及整体合拢时，腹板焊缝采用“自中间向两端，正反对称交替焊接”的方法，有效减少了变形量，保证了腹板与主板、悬臂梁大立板之间的垂直度。
（3）先定位艏艉两段的T排，实测两段T排的间距，然后定位中段T排的方法，保证了推拉架与井心线的距离满足图纸要求。
附图说明
图1为本发明一种自升式钻井平台悬臂梁推拉架建造技术的主板下料示意图。
图2为本发明一种自升式钻井平台悬臂梁推拉架建造技术的腹板下料示意图。
图3为本发明一种自升式钻井平台悬臂梁推拉架建造技术的T排示意图。
图4为本发明一种自升式钻井平台悬臂梁推拉架建造技术的推拉架定位示意图。
具体实施方式
本发明公开了一种自升式钻井平台悬臂梁推拉架建造技术其主要步骤如下：
（1）材料准备：数控切割推拉架的主板1、腹板3，在其长度方向接长合拢口处，单边加放8mm余量，在T排合拢口处加放30mm余量；宽度方向，单边加放10mm余量；插销孔2半径方向，加放了27mm余量。如图1、图2所示。
（2）主板1、腹板3接长：将构件摆放在水平胎架上，两两对接，合拢口处只留3mm焊接收缩量，然后开制坡口，调整构件整体直线度、平面度直至符合要求，然后用卡玛固定。焊接时一侧先打底焊接，另一侧再进行清根焊接，最后再焊一侧剩余部分的焊缝。主板1或腹板3分为艏、中、艉三段，两两接长后形成3段约13m长的分段。将接长后的构件卧放在机床工装台上，在其直接度和平面度均符合要求的情况下，将构件宽度方向的余量加工掉，并切制腹板坡口。
（3）T排制作：将加工后的主板1放置在水平胎架上，调整其直线度至符合要求，然后用卡码固定。在主板1上画出腹板安装线，安装对应的腹板3，调整腹板3与主板1的垂直度直至符合要求，随即点焊固定，形成T形分段（T排），如图3所示。然后安装工艺筋板将腹板3固定。按照自中间向两端，焊缝两侧对称交替焊接的方法焊接。
由于推拉架整体长约40米，重约36Ｔ，受钢板规格及材料利用率要求的限制，只能分成数段下料。而考虑到要减少外场合拢时的工作量，降低工作难度，所以将构件接长成3段，并制成T排。这样，既能使用现有的工具正常转运吊装，也能充分利用厂内现有的机床铣边、镗孔，提高制作质量。分成3段制作后，每段的孔径、孔距、孔边距都可以控制在要求之内，T排的长度也可以精确控制。在外场合拢时，虽然会因定位误差及T排长度影响合拢口处的孔距，但是只要严格控制上述两种因素，还是可以保证合拢尺寸。
（4）加工插销孔2：将制作好的T排构件立放在落地镗铣床的工作台上，调整构件与机床导轨的平行度、构件与工作台的垂直度，根据孔边距、孔间距要求，每画出一个插销孔2的中心线、加工线，就立即将该插销孔2直径镗至图纸要求。
（5）外场合拢：将加工后的T排运输至悬臂梁搭载现场。根据最艏、最艉的插销孔2与井心线4的距离要求，如图4所示，定位艏、艉两段T排，调整T排高度直至符合要求。然后测量艏、艉两端T排合拢口处的间距，将距离均分到中段T排上，修除合拢口处余量，并开制坡口，然后定位中段T排，调整其高度，直至符合要求。主板1、腹板2的对接焊缝都采用“正反交替焊接”的方法。腹板3与悬臂梁大立板的T形焊缝，采用“自中间向两端，正反对称交替焊接”的方法。
步骤（1）中，下料时钢板在长度、宽度、插销孔2半径方向都加放了余量，安排在主板1接长、T排加工、外场合拢时去除。若不留余量，那么火焰切割机较差的切割质量，无法保证下料时构件的长宽尺寸及直线度满足要求。同时，无余量制作对后续工序的制作要求极高，实施难度很大，制作质量难以保证。所以加放余量，虽然加大了材料使用量，增加了机加工工序，但是可以充分保证制作质量。
步骤（3）中，在T排制作完成后，就可以按理论尺寸将艏、艉两段的T排合拢口处余量修除，并开制剖口。中段T排的余量需保持。在车间内去除两段T排的长度余量，可以减少外场的工作量。保留中段T排长度余量，可以补偿因外场T排定位误差，引起的合拢口处的孔距变化。
步骤（5）中，先定位艏、艉两端T排，再修割中段T排并定位。保证了推拉架的长度及与井心线4距离满足图纸要求。
本发明对插销式高强钢推拉架建造的控制是循序渐进及相互影响的；如主板1接长后再加工时的直线度影响后续镗孔时的孔中心的直线度；对单个T排直线度的控制能够影响推拉架的整体直线度；单个T排首末孔的孔距也将影响推拉架合拢口处的孔距；艏、艉两段T排的定位误差影响中段T排的长度及安装位置。
以上显示和描述了本发明的基本原理和主要特征。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (6)

  1. 一种自升式钻井平台悬臂梁推拉架建造技术，其特征在于：首先将推拉架分成若干段T排，并制作，包括加工插销孔，所述T排为由主板及垂直于主板的腹板组成的截面为T型的板件，然后将制作完成的各T排在悬臂梁搭载现场整体合拢。
  2. 根据权利要求1所述的一种自升式钻井平台悬臂梁推拉架建造技术，其特征在于：所述T排制作步骤具体如下：
    （1）材料准备：加工主板、腹板，在其长轴、插销孔直径方向都留有余量；
    （2）T排制作：将加工好后的主板放置在水平胎架上，调整其直线度至符合要求，然后用卡码固定；在主板上划出腹板安装线，并安装对应的腹板；调整腹板与主板的垂直度至符合要求，随即点焊固定，形成T排，然后在腹板两侧与主板之间分别安装工艺筋板，然后自中间向两端，沿腹板与主板间焊缝焊接，并在焊缝两侧对称交替焊接；按上述步骤制作艏段、中段、艉段三段T排；
    （3）加工插销孔：将T排立放在落地镗铣床的工作台上，调整构件的直线度及与机床主轴的垂直度，根据孔边距、孔距要求，画出插销孔的中心线、加工线，然后将插销孔直径镗至图纸要求。
  3. 根据权利要求1所述的一种自升式钻井平台悬臂梁推拉架建造技术，其特征在于：所述整体合拢的具体步骤为：将加工后的T排运输至悬臂梁搭载现场；根据最艏、最艉的插销孔与井心线的距离要求，定位艏、艉两段T排，调整T排高度直至符合要求；然后定位中段T排，调整其高度，直至符合要求。主板、腹板的对接焊缝都采用正反交替焊接的方法；腹板与悬臂梁大立板的T形焊缝，采用自中间向两端，正反对称交替焊接的方法。
  4. 根据权利要求2所述的一种自升式钻井平台悬臂梁推拉架建造技术，其特征在于：加工主板、腹板时，采用构件两两对接焊接组成主板或腹板，构件在长轴、短轴和插销孔直径方向都留有余量；焊接时一侧先打底焊接，另一侧再进行清根焊接，最后再焊一侧剩余部分的焊缝；在其直接度和平面度均符合要求的情况下，将构件短轴方向的余量加工掉，并切制腹板坡口。
  5. 根据权利要求2所述的一种自升式钻井平台悬臂梁推拉架建造技术，其特征在于：在T排制作完成后，就可以按理论尺寸将艏、艉两段的T排合拢口处余量修除，并开制坡口。
  6. 根据权利要求3所述的一种自升式钻井平台悬臂梁推拉架建造技术，其特征在于：定位艏、艉两段T排后，测量艏、艉两端T排合拢口处的间距，将距离均分到中段T排上，修除合拢口处余量，并开制坡口，然后定位中段T排，调整其高度，直至符合要求。
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