CN109572006A - 一种抽油杆修复工艺 - Google Patents
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Abstract
本发明涉及一种抽油杆修复工艺。其技术方案是:包括以下步骤:第一、清洗抽油杆;第二、切除抽油杆的破损部分;第三、在所述破损部分的两端打磨出厚度为0.3 mm‑1mm,长度为5 mm‑15mm的过渡层,使其与修复层形成重叠区,达到密封的目的;第四、旧抽油杆需修复的破损部分放入注塑机的模具中,在抽油杆表面形成修复层;最后对新旧层的连接面进行处理。有益效果是:解决了原先抽油杆无法修复,只能全部更换的难题,通过选用不同材料的外层,实现了与旧抽油杆的配套和结合,降低了旧抽油杆的修复成本和能耗,提高了使用寿命。
Description
技术领域
本发明涉及一种抽油杆的局部修复工艺,特别涉及一种抽油杆修复工艺。
背景技术
目前,油田大量使用包覆抽油杆,使用后的包覆抽油杆,杆体包覆层大部分完好,局部有破损、变形、脱落等损坏现象,现有的处理方法是剥除整个包覆层后对抽油杆进行重新包覆处理,如中国专利文献公开号为CN102121359A,专利名称为《一种旧油管修复方法》,将抽油井使用过被抽油杆磨损的旧油管进行清洗试压,选出试压5MPa不渗不漏的旧油管,对其进行酸洗除绣、抛光、拉毛内表面,切除两端螺纹,重新加工新螺纹,螺纹加工合格后放入滚塑机上,以需要修复的旧油管为模具,对旧油管内表面进行滚塑,滚塑厚度为0.5-10.0mm,对滚塑后的旧油管试压,试验压力大于20MPa,5min压力不降,旧油管表面不渗不漏,将纳米级改性超高分子聚乙烯粉末滚塑到旧油管内壁,增强了旧油管的抗内压、防腐、耐磨、阻垢的性能,可以使旧油管再用于抽油井或注水井生产,减少新油管投入,具有显著的经济效益。其存在的问题是:对整个旧的抽油杆进行重新包覆处理,修复成本高、工艺复杂、耗能大。
发明内容
本发明的目的就是针对现有技术存在的上述缺陷,提供一种抽油杆修复工艺,本发明仅切除包覆杆破损部分,以注塑的方式,采用改性尼龙对包覆层进行局部修复,降低了生产成本,节约了能耗。
本发明提到的一种抽油杆的局部修复工艺,其技术方案是:采用非金属材料以热熔注塑的方式,对旧包覆抽油杆的杆体包覆层破损部分进行修复,所述的局部修复工艺包括以下步骤:
第一、清洗旧包覆抽油杆,去除油污、泥表面污染物;
第二、切除旧包覆抽油杆的原包覆层中的破损部分;
第三、在所述破损部分的两端打磨出厚度为0.3 mm -1.0mm,长度为5 mm -20mm的过渡包覆层,使其与修复包覆层形成重叠区,达到密封的目的;
第四、旧包覆抽油杆需修复的破损部分放入注塑机的模具中,热熔的非金属材料,由注塑机高压注入到模具中,在抽油杆表面形成修复包覆层,修复包覆层的厚度2-3mm;最后对新旧包覆层的连接面进行处理,达到光滑、平缓过度,紧密结合的要求。
上述非金属材料采用改性尼龙材料或改性超高分子量聚乙烯。
其中,上述改性尼龙材料的配方由以下组分按质量比制成:
聚酰胺纤维82%;N,N,-二[2,6-二异丙基苯基]碳二亚胺1.05%;氨基甲酸酯12.3%;硫代双酚3.55%;马来酸酐接枝蜡1.1%。
其中,上述改性超高分子聚乙烯的配方由以下组分按质量比制成:
分子量为300-500万的超高分子量聚乙烯93份;石墨1-2份;石蜡1-3份;硬脂酸钙0.5-1份;二氧化硅1.1份;色粉0.01份。
上述改性尼龙热熔温度为200-260℃,注塑温度为60-100℃;改性超高分子量聚乙烯热熔注塑温度300-350℃。
本发明的有益效果是:旧包覆抽油杆局部修复工艺,解决了原先包覆抽油杆包覆层无法修复,只能全部更换的难题,通过选用不同材料的包覆层,实现了与现有旧包覆杆包覆层的配套和结合,降低了旧包覆抽油杆的修复成本和能耗,提高了使用寿命。
附图说明
附图1是本发明的结构示意图;
附图2是图1中的A部放大图;
上图中:旧包覆抽油杆1、原包覆层2、修复包覆层3、过渡包覆层4。
具体实施方式
实施例1,参照附图1和2,对本发明作进一步的描述:
本发明提到的一种抽油杆的局部修复工艺,采用改性尼龙材料以热熔注塑的方式,对旧包覆抽油杆的杆体包覆层破损部分进行修复,所述的局部修复工艺包括以下步骤:
第一、清洗旧包覆抽油杆1,去除油污、泥表面污染物;
第二、切除旧包覆抽油杆的原包覆层2中的破损部分;
第三、在所述破损部分的两端打磨出厚度为0.3 mm -1.0mm,长度为5 mm -20mm的过渡包覆层4,使其与修复包覆层3形成重叠区,达到密封的目的;
第四、旧包覆抽油杆需修复的破损部分放入注塑机的模具中,热熔的非金属材料,由注塑机高压注入到模具中,在抽油杆表面形成修复包覆层3,修复包覆层3的厚度2-3mm,一次注塑修复的长度为20-50mm;最后对新旧包覆层的连接面进行处理,达到光滑、平缓过度,紧密结合的要求。
其中,上述改性尼龙材料的配方由以下组分按质量比制成:
聚酰胺纤维82%;N,N,-二[2,6-二异丙基苯基]碳二亚胺1.05%;氨基甲酸酯12.3%;硫代双酚3.55%;马来酸酐接枝蜡1.1%。
另外,改性尼龙配方的具体要求是:
第一按改性尼龙配方将原材料放入干燥机中,120℃干燥12小时;
第二按配方比例将原材料加入到注塑机中,200-260℃热熔;
第三在60-100℃进行注塑包覆。
实施例2,与实施例1不同的是,本发明提到的一种抽油杆的局部修复工艺,采用改性超高分子聚乙烯以热熔注塑的方式,对旧包覆抽油杆的杆体包覆层破损部分进行修复。其中,改性超高分子聚乙烯的配方由以下组分按质量比制成:
分子量为300-500万的超高分子量聚乙烯93份;石墨1份;石蜡1份;硬脂酸钙0.5份;二氧化硅1.1份;色粉0.01份。
改性超高分子聚乙烯配方:
首先按改性超高分子聚乙烯配方将各原材料搅拌均匀,放入干燥机中, 20-30℃干燥,将含水率降至1%以下;
其次将干燥好的原材料加入到注塑机中,300-350℃热熔注塑。
实施例3,与实施例2不同的是,本发明提到的一种抽油杆的局部修复工艺,采用改性超高分子聚乙烯以热熔注塑的方式,对旧包覆抽油杆的杆体包覆层破损部分进行修复。其中,改性超高分子聚乙烯的配方由以下组分按质量比制成:
分子量为300-500万的超高分子量聚乙烯93份;石墨2份;石蜡3份;硬脂酸钙1份;二氧化硅1.1份;色粉0.01份。
以上所述,仅是本发明的部分较佳实施例,任何熟悉本领域的技术人员均可能利用上述阐述的技术方案加以修改或将其修改为等同的技术方案。因此,依据本发明的技术方案所进行的任何简单修改或等同置换,尽属于本发明要求保护的范围。
Claims (2)
1.一种抽油杆修复工艺,其特征是:采用非金属材料以热熔注塑的方式,对旧包覆抽油杆的杆体包覆层破损部分进行修复,所述的局部修复工艺包括以下步骤:
第一、清洗旧包覆抽油杆(1),去除油污、泥等表面污染物;
第二、切除旧包覆抽油杆的原包覆层(2)中的破损部分;
第三、在所述破损部分的两端打磨出厚度为0.3 mm -1.0mm,长度为5 mm -20mm的过渡包覆层(4),使其与修复包覆层(3)形成重叠区,达到密封的目的;
第四、旧包覆抽油杆需修复的破损部分放入注塑机的模具中,热熔的非金属材料,由注塑机高压注入到模具中,在抽油杆表面形成修复包覆层(3),修复包覆层(3)的厚度2-3mm;最后对新旧包覆层的连接面进行处理,达到光滑、平缓过度,紧密结合的要求;
所述非金属材料采用改性尼龙材料,所述改性尼龙材料的配方由以下组分按质量比制成:
聚酰胺纤维82%;N,N,-二[2,6-二异丙基苯基]碳二亚胺1.05%;氨基甲酸酯12.3%;硫代双酚3.55%;马来酸酐接枝蜡1.1%。
2.根据权利要求1所述的抽油杆修复工艺,其特征是:所述改性尼龙热熔温度为200-260℃,注塑温度为60-100℃。
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CN1465743A (zh) * | 2002-06-12 | 2004-01-07 | 付建影 | 油田专用抽油杆、油管和套管的防护处理方法 |
CN1766335A (zh) * | 2004-10-26 | 2006-05-03 | 石油大学(华东) | 一种提高抽油杆强度的修复方法 |
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