CN87104896A - 多芯动力电缆,特别是钻孔机组用的供电电缆 - Google Patents
多芯动力电缆,特别是钻孔机组用的供电电缆 Download PDFInfo
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Abstract
本发明涉及一种多芯动力电缆,特别是钻孔机组诸如钻井泵用的供电电缆。这种电缆的绝缘导线1装在一个波纹金属管5内,管子波纹有深度和间距的设计应使波纹管的长度与制造这种管子所用的光管相比可短33至67%,最好是短45至55%。并且在波纹管上装有一个铠套6,当加载时铠套使波纹管的长度几乎保持不变。铠装波纹管外还有一个共用铠套7,该铠套由一个螺旋形的,带子边缘部分重叠的金属带组成。
Description
本发明涉及一种多芯动力电缆,特别是钻孔机组诸如钻井泵用的供电电缆,这种电缆的绝缘导线装在一个金属波纹管内。
为了进行石油或天然气的钻井工作,所使用的一些传动部件要放置到地面下三千米及以上的深处位置。这些传动部件,特别是钻井泵要从地面供电。为此要用电缆,而这些电缆又须满足一些很特殊的要求。必须考虑到某个时候存在于该深度上的压力情况,为此要求有一种相应耐压的电缆结构,但同时还要考虑到因传动部件本身耗热而产生温度在内数量级为120℃及以上的地温。电缆正常工作的另一个条件是当工作时间较长时,对存在于井眼或钻井内的侵蚀性介质要尽可能地不敏感,例如对侵蚀性气体或在海底钻孔时则还须对海水不敏感。
从西德公开说明书DE-OS 2853100已知有一种达到上述目的的电缆,这种电缆是由三个捆扎或相互绞成的芯线组成,上述芯线由所谓波形套包住。各个芯线均由电线、绝缘材料以及叠置在上述绝缘材料上的波形套所组成。另一个波形管包住上述三个装有波形套的芯线。这些装在芯线绝缘材料上的波形套由于波形的原故,对包裹电缆芯的波形管来说其直径变得很大。这种已知的电缆由于其直径和金属重量大而很不实用,由于四个波形管很重加上波形管直径了大而不能承受大于200巴的压力。
本发明的任务是对前面所述的那种电缆继续改进,使其能承受300巴以上的压力。此外这种电缆还有一个很高的纵向抗拉强度。
上述任务是通过下列措施解决的,即管子的波形其深度和间距的设计使波形管的长度与制造所用的光管相比可短33至67%,最好是短45至55%,并且在波形管上装有一个铠套,当增压时铠套使波形管的长度几乎保持不变。而已知的电缆由于其金属管的波纹则缩短约15%,根据本发明波纹选择得使其最好缩短45至55%。
考虑的出发点是外面管子的抗压强度可以通过下列公式来说明
P极限= (σ·S)/(γm) · (l0)/(l1)
式中σ为金属屈服点,S为管子壁厚,γm为波纹管的平均半径 (γa+γ)/2 ,而 (l0)/(l1) 则为长度l0的光管与相应波纹管长度之比。众所周知通过金属冷加工可以提高屈服点。要是把光管的缩短视为是冷加工的程度,则这种缩短还同时包括波纹深度,这样极限压力就可以定为
P极限=σf( (l0)/(l1) )· (S)/(γm) · (l0)/(l1)
σ与冷加工 (l0)/(l1) 之间的关系已经知道,那么:
P极限=a·σ· (S)/(γm) ·b
这就表明当a值在1,3至3之间,b值则在1,3至4之间。用奥氏体钢其极限压力可以提高。
还有对波纹管来说通过缩短光管的尺寸来提高抗压强度,这样缩小了管子的平均半径。
十分重要的是,光管的缩短既不是弹性的也不是塑性的。呈螺旋形叠置的铠套可抵制电缆的拉伸。这种特殊结构的铠套是很容易弯曲的,即它不会限制电缆的弯曲性,在垂直安装时或高压状态下从安全角度出发当然要避免波纹管的延伸。
对于有并行芯线或绝缘导线的电缆本身各由一个铠装波纹管包住,可适当地设置一个附加铠套将这些波纹管一起围住。这种铠装可适当地由一种螺旋形的,带子边缘部分重叠的金属带组成,同时金属带从其截面来看产生变形时在重叠的部分,金属带的边缘是靠着摩擦连接在一起并且呈封闭状态。上述附加铠套应束紧各个波纹管,此外还能附加地使直接放置在波纹管上的铠套在电缆例如悬置在井眼内时承受延伸。
按照发明的一个特别有利的结构是管子外径与壁厚之比60至125,而波形深度与壁厚之比则在8至25之间。上述数据用一个纵向进入的金属带就可连续制作并形成一个易挠曲的管子。要是按照另一个发明构思将波纹管做成双壁的,则管子的耐压能力还可提高。此时先紧密地叠合形成光管再一起做出波形。铠套可适当地用许多呈螺旋形叠置的高强度金属丝组成。同时应按2D至6D的绞距来叠置这些金属丝,其中D为波纹管的外径。上述规定尺寸在未增压时可阻碍管子的延伸是很肯定的。另一种可供选用的铠套结构是,许多高强度金属丝以交错绞合叠置在波纹管上,并通过至少一个高强度金属丝或一个高强度带,用短绞距和高予应力来叠置的。这种结构形式特别适用于较大的直径,因为制造时可以不用复杂的缠绕装置。上述两种结构形式的金属丝数量选择应使其几乎100%地形成波纹管的表面复盖层。
但是还可选用的铠套是由一个螺旋形的,带子边缘部分重叠的金属带组成,同时金属带从其截面来看产生变形时在重叠的部分,金属带的边缘是靠着摩擦连接在一起并且呈封闭状态。上述结构形式的绞距是很短的,但此时要注意到金属带应牢固地放置在波纹管的表面上。这种铠套在增压时或在垂直安置电缆时也可阻碍波纹管发生显著的延伸。电缆的弯曲性由于铠套降低不多。金属管和铠套因要腐蚀均应由同一材料制成。最好是用奥氏体钢,因为这种材料和大多数介质相比是耐腐蚀的并且完全可以进行冷加工。
每个波纹管可套上一个用线材,最好是用优质钢制的金属丝来组成编织层。这样一种编织层不仅可以提高管子的抗压强度,而且还可提高电缆结构的抗拉强度。上述波纹管均紧装在芯线的绝缘材料上,而使芯线固定在波纹管内。
本发明借助于图1至4内示意性表示的实施例以及图表作详细说明。
图1和3表示电缆的俯视图;
图2和4表示电缆的截面图;
图5是表示提高屈服点与不同材料制成单一波形的关系的曲线图。
按图1和2的电缆由三个并置导线1组成一或是实心的或是由一些单根金属丝绞合而成一其上复有一薄层聚酰亚胺2。复层2上面配置有真正的绝缘材料3,该材料则由乙烯-丙烯-复合物组成。这种绝缘材料以耐高温和耐湿性好而著称。复层3上面还有一层腈橡胶4。这种材料是耐油的并且具有优异的机械性能。在复层4的外表面上是做成波形深的波纹管5,按连续工作方式将上述波纹管安装在每个芯线上。此时用一个纵向进入的金属带包装连贯的芯线,上述金属带绕芯线周围形成管子,焊接纵缝,接着使管子做成波形。用这种方式几乎可以制造任何长度的铠装芯线,因此使插装部位上互相靠近接合电缆长度的工作可减到最低程度。波纹管5最好由奥氏体钢制成,该管还用一个单根金属丝组成的编织层6来包装,其金属丝也由奥氏体钢制成。所有三个芯线均由一个共用铠套7围住,而该铠套紧装在金属编织层6或波形套5上。铠套7由一个金属带做成,上述金属带呈螺旋形安置在这些芯线上。两个并置绕制件的带边呈爪状交错接合并在各个绕制件之间设置成张紧并呈闭合状的连接。作为铠套7的材料还可以预拉伸奥氏体钢来满足要求。
按照本发明的一种观点其波纹管5的波形是使管子缩短约50%做成的。一种可以用来制造这样一种波形以连续工作方式进行即长度几乎不受限制的方法首次是在申请人的家里研究出来的并且是专利申请P3431120.3的申请主题。
图3和4表示按照本发明技术措施的另一个实施例。
用11表示三个最好是用铜制成的导线,这些导线可以做成实心的或是做成绞合连接的。导线11由一个绝缘层12围住,绝缘层则由一种乙烯丙烯复合物组成。上述三个绝缘导线适当地绞合在一起。绞合导线均由另一个绝缘层13围住,该绝缘层则适当地由一种耐油和耐湿的腈橡胶组成。套在上述绝缘层13上的波纹管14是由一个纵向进入形成管子焊好并做成波形的金属带组成。在一定制造条件下电缆可以做成几乎无限长,因此可以最大限度地避免接合电缆长度的工作。处于波纹管14波峰上的铠套15是由许多按大绞距叠置的金属丝组成。波纹管14和铠套15的金属丝一样也用奥氏体钢制成。同时波纹管14适当地做成双壁。
有一种电缆的波纹管14是由优质钢制成的,它具有外径为41.5毫米、内径为29.8毫米、波距为3.9毫米、壁厚为0.5毫米和波形深度为5.35毫米,在压力室里对其试验。这种电缆可承受压力达到500公斤/厘米2。
按照迄今已知的继续制作波形方法其管子缩短最大可达到约15%,而用新法则不用很多投资就可缩短60%以上。
铠装15用于例如在垂直设置电缆时避免因电缆自重导致波纹管14延伸。出于上述原因重要的是铠套15应紧装在波纹管14上。
按照本发明技术措施做成的几种电缆根据压力试验进行检验,得出清楚的列表曲线(见图5),试验样品5,7和8在达到试验压力后折断。图表明确地表示借助于做成深波形的管子在经济上耗费不大就可以克服超过340巴的压力。
Claims (10)
1、多芯动力电缆,特别是钻孔机组诸如钻井泵用的供电电缆,这种电缆的绝缘导线装在一个波纹金属管内,其特征在于,管子(5,14)的波纹其深度和间距的设计使波纹管(5,14)的长度与制造这种管子所用的光管相比可短33至67%,最好是短45至55%,并且在波纹管(5,14)上装有一个铠套(6,15),当加载时铠套使波纹管(5,14)的长度几乎保持不变。
2、按权利要求1的多芯动力电缆,这种电缆并列的芯线本身各有一个铠装波纹管,其特征在于,铠装波纹管(5,14)另外还有一个共用铠套(7),而该铠套则由一个螺旋形的,带子边缘部分重叠的金属带组成,同时金属带从其截面来看产生变形时在重叠的部分金属带的边缘是靠着摩擦连接在一起并且呈封闭状态。
3、按权利要求1或2的多芯动力电缆,其特征在于,波纹管外径与壁厚之比为60至125,而波纹深度与壁厚之比则为8至25。
4、按权利要求1或其后权利要求之一的多芯动力电缆,其特征在于,其波纹管(5,14)是做成双壁的。
5、按权利要求1至4之一的多芯动力电缆,其特征在于,其铠套(15)是由许多呈螺旋形叠置的高强度金属丝组成。
6、按权利要求5的多芯动力电缆,其特征在于,其金属丝是按绞距为5D至6D叠置的,其中D为波纹管(5,14)的外径。
7、按权利要求1至4之一的多芯动力电缆,其特征在于,许多高强度金属丝以交错绞接叠置在波纹管(14)上,并通过至少一个具有短绞距和高予应力高强度金属丝或一个高强度带来叠置的。
8、按权利要求1至7之一的动力电缆,其特征在于,其金属管(5,14)和铠套(6,15)是用同一材料制成的,最好采用奥氏体钢制成。
9、按权利要求1或其后权利要求之一的多芯动力电缆,其特征在于,每个波纹管(5,14)套有一个用线材,最好是用优质钢制的金属丝来组成编织层(6)。
10、按权利要求1至9之一的多芯动力电缆,其特征在于,其波纹管(5,14)紧装在芯线的绝缘材料(4,13)上。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843436516 DE3436516A1 (de) | 1984-10-05 | 1984-10-05 | Mehradriges elektrisches energiekabel, insbesondere versorgungskabel fuer bohrlochaggregate |
DE19843436517 DE3436517A1 (de) | 1984-10-05 | 1984-10-05 | Mehradriges elektrisches energiekabel, insbesondere versorgungskabel fuer bohrlochaggregate |
DEP3436517.6 | 1984-10-05 | ||
DEP3436516.8 | 1984-10-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN87104896A true CN87104896A (zh) | 1988-03-09 |
CN1009038B CN1009038B (zh) | 1990-08-01 |
Family
ID=25825388
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN85103995A Expired CN85103995B (zh) | 1984-10-05 | 1985-05-23 | 金属管的波纹成型方法和及其专用设备 |
CN87104896A Expired CN1009038B (zh) | 1984-10-05 | 1987-07-13 | 一种用于钻孔机组的多芯动力电缆 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN85103995A Expired CN85103995B (zh) | 1984-10-05 | 1985-05-23 | 金属管的波纹成型方法和及其专用设备 |
Country Status (4)
Country | Link |
---|---|
US (1) | US4749823A (zh) |
CN (2) | CN85103995B (zh) |
CA (1) | CA1241393A (zh) |
DE (1) | DE3436516A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101950611A (zh) * | 2010-09-18 | 2011-01-19 | 特变电工(德阳)电缆股份有限公司 | 顶驱钻井专用电缆及其制造方法 |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5153381A (en) * | 1990-03-20 | 1992-10-06 | Alcan Aluminum Corporation | Metal clad cable and method of making |
US5086196A (en) * | 1990-08-09 | 1992-02-04 | Camco, Incorporated | Electro-mechanical cable for cable deployed pumping systems |
US5350885A (en) * | 1992-04-08 | 1994-09-27 | Monogram Industries, Inc. | Armored cable |
US5384430A (en) * | 1993-05-18 | 1995-01-24 | Baker Hughes Incorporated | Double armor cable with auxiliary line |
US5527995A (en) * | 1994-08-03 | 1996-06-18 | The Okonite Company | Cable for conducting energy |
US5927344A (en) * | 1996-01-03 | 1999-07-27 | Nobileau; Philippe | Subsea flexible pipe |
CN1076644C (zh) * | 1996-03-25 | 2001-12-26 | 湖北重型机器集团有限公司 | 波纹管滚轧方法及设备 |
SE506366C2 (sv) * | 1996-04-23 | 1997-12-08 | Ericsson Telefon Ab L M | Självbärande kabel och förfarande för tillverkning därav |
US5990574A (en) * | 1996-12-20 | 1999-11-23 | Lear Automotive Dearborn, Inc. | Integrated steering system |
US6255591B1 (en) * | 1998-10-13 | 2001-07-03 | Gerhard Ziemek | Electric cables with metallic protective sheaths |
IT1317465B1 (it) * | 2000-05-05 | 2003-07-09 | Nupi S P A | Tubo in materiale plastico con struttura avente pressione criticamigliorata |
US6825418B1 (en) * | 2000-05-16 | 2004-11-30 | Wpfy, Inc. | Indicia-coded electrical cable |
GB2377951B (en) * | 2001-07-25 | 2004-02-04 | Schlumberger Holdings | Method and system for drilling a wellbore having cable based telemetry |
US8905108B2 (en) | 2007-06-04 | 2014-12-09 | Encore Wire Corporation | Method and apparatus for applying labels to cable |
US8113273B2 (en) * | 2008-12-11 | 2012-02-14 | Schlumberger Technology Corporation | Power cable for high temperature environments |
US7954530B1 (en) | 2009-01-30 | 2011-06-07 | Encore Wire Corporation | Method and apparatus for applying labels to cable or conduit |
US8826960B1 (en) | 2009-06-15 | 2014-09-09 | Encore Wire Corporation | System and apparatus for applying labels to cable or conduit |
US11319104B1 (en) | 2009-01-30 | 2022-05-03 | Encore Wire Corporation | System and apparatus for applying labels to cable or conduit |
US9035185B2 (en) | 2010-05-03 | 2015-05-19 | Draka Holding N.V. | Top-drive power cable |
US8993889B2 (en) * | 2012-05-18 | 2015-03-31 | General Cable Technologies Corporation | Oil smelter cable |
US9171659B2 (en) * | 2012-09-14 | 2015-10-27 | Abb Research Ltd | Radial water barrier and a dynamic high voltage submarine cable for deep water applications |
JP2019129104A (ja) * | 2018-01-26 | 2019-08-01 | 日立金属株式会社 | 絶縁電線 |
JP7006749B1 (ja) * | 2020-09-30 | 2022-01-24 | 日立金属株式会社 | 多芯ケーブル及び信号伝送路 |
CN114749555A (zh) * | 2022-05-11 | 2022-07-15 | 浙江福莱斯伯光电科技有限公司 | 一种金属软管成型装置及其成型方法 |
CN117680507A (zh) * | 2023-12-11 | 2024-03-12 | 无锡维思德自动化设备有限公司 | 一种具有智能同步功能的金属软管成型设备 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1314333A (en) * | 1919-08-26 | Steam-hose | ||
US1275279A (en) * | 1915-01-25 | 1918-08-13 | American Circular Loom Co | Conduit or conductor. |
US1826666A (en) * | 1930-07-25 | 1931-10-06 | E B Badger & Sons Company | Expansion joint |
US2164168A (en) * | 1935-05-15 | 1939-06-27 | Hillside Cable Co | Armored electrical cable |
US2259850A (en) * | 1937-12-07 | 1941-10-21 | Zundorf Heimut | Sheathed electric cable |
US2531917A (en) * | 1945-10-17 | 1950-11-28 | Mollerhoj Johannes Sorensen | Expansible sheath electric power cable |
US2870792A (en) * | 1956-03-07 | 1959-01-27 | Pirelli General Cable Works | Metal tubes or metal sheaths of electric cables |
DE1232228B (de) * | 1962-11-16 | 1967-01-12 | Johannes Sorensen Mollerhoj | Hochspannungs-Flachkabel |
US3582536A (en) * | 1969-04-28 | 1971-06-01 | Andrew Corp | Corrugated coaxial cable |
DE2064053A1 (de) * | 1970-12-28 | 1972-07-06 | Kabel Metallwerke Ghh | Rohrförmiges metallisches Gebilde mit Schraubenlinien- oder ringförmiger Wellung |
US4282398A (en) * | 1978-10-11 | 1981-08-04 | Solomon John H | Anti-holiday cable armor |
DE2853100A1 (de) * | 1978-12-08 | 1980-06-19 | Kabel Metallwerke Ghh | Elektrisches energiekabel, insbesondere versorgungskabel fuer bohrlochaggregate |
US4449013A (en) * | 1982-02-26 | 1984-05-15 | Biw Cable Systems, Inc. | Oil well cable |
US4453036A (en) * | 1982-09-30 | 1984-06-05 | Harvey Hubbell Incorporated | Oil well cable |
-
1984
- 1984-10-05 DE DE19843436516 patent/DE3436516A1/de not_active Withdrawn
-
1985
- 1985-05-23 CN CN85103995A patent/CN85103995B/zh not_active Expired
- 1985-08-23 CA CA000489319A patent/CA1241393A/en not_active Expired
-
1987
- 1987-04-06 US US07/035,220 patent/US4749823A/en not_active Expired - Fee Related
- 1987-07-13 CN CN87104896A patent/CN1009038B/zh not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101950611A (zh) * | 2010-09-18 | 2011-01-19 | 特变电工(德阳)电缆股份有限公司 | 顶驱钻井专用电缆及其制造方法 |
CN101950611B (zh) * | 2010-09-18 | 2012-02-29 | 特变电工(德阳)电缆股份有限公司 | 顶驱钻井专用电缆及其制造方法 |
Also Published As
Publication number | Publication date |
---|---|
US4749823A (en) | 1988-06-07 |
CN85103995A (zh) | 1986-03-10 |
CN85103995B (zh) | 1988-12-14 |
CN1009038B (zh) | 1990-08-01 |
CA1241393A (en) | 1988-08-30 |
DE3436516A1 (de) | 1986-04-10 |
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