Study on the Erosion Law of Gas with Cuttings Against Tool Joint

doi:10.11885/j.issn.1674-5086.2013.11.04.02

Abstract

Abstract:

Abstract：Severe erosion against the tool joint always leads to rapid failure of the drill pipe in gas drilling. In order to understand
the mechanism of this problem，we established the CFD model of the erosion of gas with cuttings against the drill pipe with
18° slope based on two phase fluid theory. According to this model，systematical studies have been made about the effects of
different eccentricity，injection volume of gas，and drill rate on the erosion rate against the tool joint，and on the trajectory and
distribution of cuttings and gas velocity. The results show that：at the first，when the drill pipe is in the cylindrical center of
borehole，the distribution of erosion rate is symmetrical，the erosion against tool joint is more severe than against the drill pipes’
body and the maximum erosion rate is near the windward slope top. Meanwhile，the quantitative relationship between cuttings’
mass flow rate，gas velocity and the maximum erosion rate has been worked out. And then，the maximum erosion rate against
the drill pipe and the erosion rate against the tool joint on one side of the wide flowpath are more severe when the drill pipe is
eccentric. The maximum erosion is transferred from the joint to the drill pipes’ body when the drill pipe eccentricity from 30%
to 70%. The maximum erosion rate against the tool joint increased with the increase of gas velocity when drill pipe eccentricity
was at 0～30%，50%～70% and 80%～90%，respectively. But the maximum erosion rate against the tool joint decreased with the
decrease of cutting concentration in wide flowpath when drill pipe eccentricity was at 30%～50% and 70%～80%，respectively.
All the results from these studies provide the theoretical support for preventing failure of the tool joint and were applied in some
oilfields.

Key words: Key words：cuttings, two-phase flow, erosion, tool joint, eccentricity

Ming Xin1, Lian Zhanghua1, Lin Tiejun1, Chen Xinhai1, Zheng Jianxiang1，2. Study on the Erosion Law of Gas with Cuttings Against Tool Joint[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2013.11.04.02.

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References

[1] 艾惊涛，余锐，廖兵，等. 四川油气田气体钻井技术现

状及发展方向[J]. 天然气工业，2009，29（7）：39–41.

Ai Jingtao，Yu Rui，Liao Bing，et al. The status quo and future

development of gas drilling technology in the Sichuan

Gas Field[J]. Natural Gas Industry，2009，29（7）：39–41.

[2] 苏义脑，周川，窦修荣. 空气钻井工作特性分析与工

艺参数的选择研究[J]. 石油勘探与开发，2005，32（2）：

86–90，122.

Su Yinao，Zhou Chuan，Dou Xiurong. Operation characteristics

analysis and process parameters selection of

air drilling[J]. Petroleum Exploration and Development，

2005，32（2）：86–90.

[3] 林铁军．气体钻井钻具失效机理研究[D]. 成都：西南

石油大学，2009．

[4] 祝效华，刘少胡，童华. 气体钻井钻杆冲蚀规律研究[J].

石油学报，2010，31（6）：1013–1017.

Zhu Xiaohua，Liu Shaohu，Tong Hua. A study on the drill

pipe erosion law in gas drilling[J]. Acta Petrolei Sinica，

2010，31（6）：1013–1017.

[5] 练章华，魏臣兴，宋周成，等. 高压高产气井屈曲管柱

冲蚀损伤机理研究[J]. 石油钻采工艺，2012，34（1）：

6–9.

Lian Zhanghua，Wei Chenxing，Song Zhoucheng，et al.

Erosion damage mechanism of buckled tubing in high

pressure and high production gas wells[J]. Oil Drilling &

Production Technology，2012，34（1）：6–9.

[6] 刘文红，李磊，刘永刚，等. 基于流场分析的钻杆内加

厚过渡带管冲蚀失效机理[J]. 中国腐蚀与防护学报，

2011，31（2）：160–164.

Liu Wenhong，Li Lei，Liu Yonggang，et al. Mechanism of

erosion-corrosion washout failure in internal upset transition

zone for drillpipe based on application of flow field

analysis[J]. Journal of Chinese Society for Corrosion and

Protection，2011，31（2）：160–164.

[7] 黄小兵，刘清友. 基于气体钻井工艺参数的钻具冲蚀

模型[J]. 石油学报，2012，33（5）：878–880.

Huang Xiaobing，Liu Qingyou. An erosion model of drill

string based on process parameters of gas drilling[J]. Acta

Petrolei Sinica，2012，33（5）：878–880.

[8] 林铁军，练章华，陈世春，等. 气体钻井中气体携岩对

钻杆的冲蚀机理研究[J]. 石油钻采工艺，2010，32（4）：

1–4.

Lin Tiejun，Lian Zhanghua，Chen Shichun，et al. Study on

drill pipe erosion of gas carrying cuttings in gas drilling[J].

Oil Drilling & Production Technology，2010，32（4）：1–4.

[9] 朱红钧，林元华，李强，等. 空气钻井井眼净化与冲蚀

效应模拟分析[J]. 断块油气田，2010，17（6）：765–768.

Zhu Hongjun，Lin Yuanhua，Li Qiang，et al. Numerical

simulation of hole cleaning and erosion effect for air

drilling[J]. Fault-Block Oil & Gas Field，2010，17（6）：

765–768.

[10] 郭建华，佘朝毅，李黔，等. 气体钻井井筒冲蚀作

用定量分析及控制方法[J]. 石油学报，2007，28（6）：

129–132.

Guo Jianhua，She Chaoyi，Li Qian，et al. Quantitative

analysis and controlling method for pipe string erosion

in gas drilling[J]. Acta Petrolei Sinica，2007，28（6）：

129–132.

[11] 丁珏，翁培奋. 90° 弯管内流动的理论模型及流动特性

的数值研究[J]. 计算力学学报，2004，21（3）：314–321，

329.

Ding Jue，Weng Peifen. Numerical simulation of theoretical

models & flow characteristics in 90° bending

duct[J]. Chinese Journal of Computational Mechanics，

2004，21（3）：314–321，329.

[12] 袁新明，贺治国，毛根海. 用RNG k–ε 紊流模型对截

止阀三维紊流流动的数值模拟[J]. 流体机械，2006，

34（2）：34–38.

Yuan Xinming，He Zhiguo，Mao Genhai. Numerical simulation

of a turbulence flow in the cut-off valve by RNG

k–ε turbulence model[J]. Fluid Machinery，2006，34（2）：

34–38.

[13] 刘涛，李风婷，景雪辉. T 型管接头的流固耦合及热应

力分析[J]. 机床与液压，2010，38（3）：127–128，136.

Liu Tao，Li Fengting，Jing Xuehui. The T-tube joint fluidsolid

coupling and thermal stress analysis[J]. Machine

Tool & Hydraulics，2010，38（3）：127–128，136.

[14] Edwards J K，McLaury B S，Shirazi S A. Modeling solid

particle erosion in elbows and plugged tees[J]. Journal of

Energy Resources Technology，2001，123（4）：277–284.

[15] Nøkleberg L，Søntvedt T. Erosion of oil & gas industry

choke valves using computational fluid dynamics and experiment[

J]. International Journal of Heat and Fluid Flow，

1998，19（6）：636–643.