CN202081837U - 抗应力腐蚀气密封套管螺纹接头 - Google Patents
抗应力腐蚀气密封套管螺纹接头 Download PDFInfo
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- CN202081837U CN202081837U CN2011201086181U CN201120108618U CN202081837U CN 202081837 U CN202081837 U CN 202081837U CN 2011201086181 U CN2011201086181 U CN 2011201086181U CN 201120108618 U CN201120108618 U CN 201120108618U CN 202081837 U CN202081837 U CN 202081837U
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- 238000007789 sealing Methods 0.000 title claims abstract description 30
- 231100000078 corrosive Toxicity 0.000 title abstract description 8
- 231100001010 corrosive Toxicity 0.000 title abstract description 8
- 230000037250 Clearance Effects 0.000 claims abstract description 5
- 230000035512 clearance Effects 0.000 claims abstract description 5
- 238000005260 corrosion Methods 0.000 claims description 11
- 239000011324 bead Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
- 230000002093 peripheral Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 239000008186 active pharmaceutical agent Substances 0.000 description 6
- 210000002445 Nipples Anatomy 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
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- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
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- 238000005452 bending Methods 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound 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- 230000001808 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N dihydrogen sulfide Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- -1 sulfide hydrogen Chemical class 0.000 description 1
Abstract
本实用新型为抗应力腐蚀气密封套管螺纹接头，解决已有接头易粘扣，加工困难，抗应力腐蚀能力差，气密封性能不稳定的问题。由接箍（2）两端各与一接头（1）连接构成，接箍（2）的内壁有内径周向台肩（7），其断面为等腰梯形，台肩（7）的内壁为等腰梯形的底边，台肩两侧的内壁依次有锥形密封面（5′）、圆柱过渡面（4′）和锥形内螺纹面（3′）与接头（1）的锥形密封面（5）、外螺纹圆柱过渡面（4）和锥形外螺纹面（3）配合，圆柱过渡面为间隙配合，锥形密封面为过盈配合，通过设计合理的过盈量及其密封面长度保证密封性能，过盈量0.4—0.5mm，密封面长度＞6mm，台肩（7）的抗扭矩台肩面（6′）与接头（1）端面的抗扭矩台肩面（6）配合。
Description
抗应力腐蚀气密封套管螺纹接头
[0001] 技术领域：
[0002] 本实用新型涉及一种螺纹接头，特别是一种抗应力腐蚀气密封套管螺纹接头，属于石油及天然气工业中套管螺纹接头领域。
[0003] 背景技术：
[0004] API螺纹由于技术成熟、易于加工、成本较低等优点，一直应用比较广泛，但API螺纹由于结构设计方面的原因，存在许多难以克服的缺陷，如，连接强度低、密封性能不可靠、 接头应力水平高等，使API螺纹的使用受到限制。随着石油天然气资源的勘探和开发，含硫化氢、二氧化碳等腐蚀介质的油气田的开发日益增加，套管的工作环境也日益恶劣和复杂。当前世界油气田中大约有1/3含有硫化氢气体，中国西部油气田及四川盆地等油气田都含有腐蚀介质等特点。为此，国内外一些先进的套管生产厂纷纷开发特殊螺纹接头。 一般来讲，多数特殊螺纹的油套管接头都是由三个部分构成：连接螺纹、密封面和抗扭矩台肩。
[0005] 中国专利9622^92. X公开了一种油井管螺纹接头，该接头采用变形的API偏梯形螺纹，密封结构为柱面对球面金属过盈密封，扭矩台肩为直角。该接头结构存在以下缺陷： 柱面对球面金属过盈密封属于线、面接触密封，密封接触面积小，接触应力高，在上卸扣过程中不但容易粘扣失效且其在腐蚀环境下容易发生应力腐蚀失效；直角扭矩台肩在受轴向拉力时接触压力下降很快，且抗弯曲及复合载荷能力较差；球面密封结构加工难度大，检测不方便。
[0006] 实用新型内容：
[0007] 本实用新型的目的是提供一种连接强度高、易于加工和检测，抗应力腐蚀能力强， 气密封性能稳定的抗应力腐蚀气密封套管螺纹接头。
[0008] 本实用新型是这样实现的：
[0009] 本实用新型由接箍2两端各与一接头1螺纹连接构成，接箍2的内壁有内径周向台肩7，其断面为等腰梯形，台肩7的内壁为等腰梯形的底边，台肩两侧的内壁依次有锥形密封面5'、圆柱过渡面4'和锥形内螺纹面3'与接头1的锥形密封面5、圆柱过渡面4和锥形外螺纹面3配合，圆柱过渡面为间隙配合，锥形密封面为过盈配合，台肩7的抗扭矩台肩面6'与接头1端面的抗扭矩台肩面6配合。
[0010] 螺纹为偏梯形螺纹，密封面锥度为1 ： 10，锥形螺纹面锥度为1 ： 16，扭矩台肩角度为负15°。
[0011] 锥形密封面过盈配合的过盈量0.4—0. 5mm，密封面长度> 6mm。台肩7与接头1 内壁平齐。
[0012] 本实用新型连接强度高，易于加工和检测，解决了已有接头易粘扣，抗应力腐蚀能力差，气密封性能不稳定的问题，保证了接头在腐蚀介质环境下其气密封性能的稳定性。本接头采用低应力设计，螺纹部分采用符合API标准的偏梯形螺纹，减小了上扣后螺纹的应力水平。密封结构采用锥面对锥面金属过盈密封技术，密封面锥度为1 ： 10，设计了合理的密封过盈量和密封面长度，提高了密封面的接触压力和接触面积，从而降低了密封面处的接
3触应力提高了抗应力腐蚀能力。圆柱过渡面与圆柱过渡面为间隙配合，可储存上扣后螺纹部分多余螺纹脂，减小螺纹部分的螺纹脂压力。抗扭矩台肩为负角度逆向台肩，提高了接头的抗复合载荷能力。内平齐设计有效地消除了流体紊流现象，并减少了能量损失。通过以上设计，本接头在上扣后整体应力水平较低，约为普通螺纹的30%〜40%左右，大大提高了其抗应力腐蚀能力。本接头结构合理、气密封性能可靠且加工难度小，生产效率高，适用于深井、高压井等，应用前景广阔。
[0013] 附图说明：
[0014] 图1为实用新型接头装配图。
[0015] 图2为外螺纹接头结构示意图。
[0016] 具体实施方式：
[0017] 气密封套管螺纹接头，采用接箍式连接，包括接头1，接箍2，外螺纹面3，外圆柱过渡面4，锥形密封面5，内螺纹面3'，圆柱过渡面4'，锥形密封面5'，抗扭矩台肩面6，抗扭矩台肩面6'。
[0018] 本实用新型的各部分结构为：
[0019] 螺纹采用符合API标准的偏梯形螺纹，外螺纹锥度与标准API螺纹接头相同，均为 1:16 ；密封面锥度为1:10 ；扭矩台肩角度为负15°。
[0020] 外螺纹面3与锥形密封面5之间为一段圆柱过渡面4，相交点采用圆弧过渡；抗扭矩台肩面6为逆向台肩，且与锥形密封面5之间采用圆弧过渡。
[0021] 接箍中部具有抗扭矩台肩7，抗扭矩台肩面6'为逆向台肩。接箍内壁面与该抗扭矩台肩面6'两侧相交处分别为一段锥形密封面5'。接箍内壁面与锥形密封面5'之间为一段圆柱过渡面4'，相交点采用圆弧过渡。接箍内壁面与圆柱过渡面4'之间为内螺纹面 3'。接箍抗扭矩台肩7内壁与外螺纹接头1的内壁平齐。
[0022] 如图所示：在接头1和接箍2配合时，外螺纹面3与内螺纹面3'配合实现螺纹连接；圆柱过渡面4与圆柱过渡面4'为间隙配合，减小了螺纹啮合后的螺纹脂压力；密封面 5与密封面5 ‘为过盈配合，构成主密封结构，过盈量为0. 47mm,密封面长度为7mm，逆向扭矩台肩面6与接箍抗扭矩台肩面6'配合，达到上扣定位和提高抗复合载荷的能力。
Claims (3)
1.抗应力腐蚀气密封套管螺纹接头，其特征在于由接箍（2)的两端各与一接头（1)螺纹连接构成，接箍（2)的内壁有内径周向台肩（7)，其断面为等腰梯形，台肩（7)的内壁为等腰梯形的底边，台肩两侧的内壁依次有锥形密封面（5')、圆柱过渡面4'和锥形内螺纹面 (3')与接头（1)的锥形密封面（5)、圆柱过渡面（4)和锥形外螺纹面（3)配合，圆柱过渡面为间隙配合，锥形密封面为过盈配合，台肩（7)的抗扭矩台肩面（6')与接头（1)端面的抗扭矩台肩面（6)配合。
2.根据权利要求1所述的抗应力腐蚀气密封套管螺纹接头，其特征在于螺纹为偏梯形螺纹，密封面锥度为1 ： 10，锥形螺纹面锥度为1 ： 16，扭矩台肩角度为负15°。
3.根据权利要求1所述的抗应力腐蚀气密封套管螺纹接头，其特征在于锥形密封面过盈配合的过盈量为0. 4—0. 5mm，锥形密封面长度> 6mm，台肩（7)与接头（1)的内壁平齐。
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587845A (zh) * | 2012-03-16 | 2012-07-18 | 西安摩尔石油工程实验室有限公司 | 可与api圆螺纹互换的气密封套管螺纹接头 |
| CN103899254A (zh) * | 2012-12-25 | 2014-07-02 | 建湖县永维阀门钻件有限公司 | 一种多头螺纹快速连接式钻井隔水（隔沙）管 |
| CN104142292A (zh) * | 2014-08-05 | 2014-11-12 | 华北电力大学 | 一种用于电站锅炉过热器管高温腐蚀实验及表征的方法 |
| CN104895508A (zh) * | 2015-06-29 | 2015-09-09 | 东营市永利精工石油机械制造有限公司 | Hthp油气井用特殊螺纹接头 |
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2011
- 2011-04-14 CN CN2011201086181U patent/CN202081837U/zh not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587845A (zh) * | 2012-03-16 | 2012-07-18 | 西安摩尔石油工程实验室有限公司 | 可与api圆螺纹互换的气密封套管螺纹接头 |
| CN103899254A (zh) * | 2012-12-25 | 2014-07-02 | 建湖县永维阀门钻件有限公司 | 一种多头螺纹快速连接式钻井隔水（隔沙）管 |
| CN104142292A (zh) * | 2014-08-05 | 2014-11-12 | 华北电力大学 | 一种用于电站锅炉过热器管高温腐蚀实验及表征的方法 |
| CN104142292B (zh) * | 2014-08-05 | 2016-08-24 | 华北电力大学 | 一种用于电站锅炉过热器管高温腐蚀实验及表征的方法 |
| CN104895508A (zh) * | 2015-06-29 | 2015-09-09 | 东营市永利精工石油机械制造有限公司 | Hthp油气井用特殊螺纹接头 |
| CN104895508B (zh) * | 2015-06-29 | 2017-05-31 | 东营市永利精工石油机械制造有限公司 | Hthp油气井用特殊螺纹接头 |
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