地层测试工具耐230℃O型密封圈优选试验研究  

Experimental study on optimal selection of O-ring seals resistant to 230℃for formation testing tools

作　　者：潘登 张洋 王东林 贾海 周继东 PAN Deng;ZHANG Yang;WANG Donglin;JIA Hai;ZHOU Jidong(CCDC Well-Intervention Company,Chengdu,Sichuan 610052,China)

机构地区：[1]中国石油集团川庆钻探工程有限公司试修公司,四川成都610052

出　　处：《油气井测试》2024年第2期15-20,共6页Well Testing

基　　金：中国石油集团公司项目“230℃/140 MPa抗硫试油测试关键装备研制”(2021ZG09);中国石油川庆钻探公司项目“适用非常规套管的200℃/105 MPa完井封隔器及150℃/105 MPa井下安全阀研制”(CQ2022B-46-1-4)。

摘　　要：为了在设计地层测试工具的过程中优选出抗高温、承高压、抗腐蚀能力强及密封性好的O型橡胶密封圈,研制了可满足多型号O型密封圈共用的模拟试验工装。该工装可模拟高温高压条件以及密封圈的不同的装配方式,进行性能评价试验;同时以适应工程应用为评价原则设计了一套充分模拟地层测试作业中温度、压力变化过程和边界参数的评价试验方法,对多个型号的耐高温的O型密封圈开展了试验评价。针对230℃/105 MPa地层测试工具设计,优选出了3种具有较好的高温承压能力和密封持久性能的密封圈,其基材是全氟醚橡胶,在浓度20%的盐酸中浸泡96 h,经两次升温至230℃,一次降温至常温的温度交变过程中,都能反复承受长达48 h的高压(105 MPa)密封测试,该试验为加快高温高压测试工具的研发进程奠定了基础。In order to optimally select O-ring rubber seals with high temperature resistance,high pressure resistance,strong corrosion resistance,and good sealing performance during the design of formation testing tools,a simulation test fixture capable of accommodating multiple types of O-ring seals was developed.This fixture can simulate high temperature,high pressure conditions,and different assembly methods of the seals for performance evaluation tests.Meanwhile,a set of evaluation test methods was designed based on engineering application principles,which can fully simulate the temperature,pressure variations and boundary parameters during formation testing operations.Evaluation tests were conducted on multiple types of high-temperature-resistant O-ring seals.For the design of formation testing tools operating at 230℃/105 MPa,three types of seals with excellent high-temperature pressure resistance and sealing durability were selected.These seals,made of perfluoro rubber,were subjected to a temperature cycling process from room temperature to 230℃in 20%hydrochloric acid immersion for 96 hours,repeatedly enduring 48 hours of high-pressure(105 MPa)sealing tests.This experiment laid a foundation for accelerating the development process of high-temperature and high-pressure testing tools.

关 键 词：地层测试 工具设计 高温 高压 抗腐蚀 O型密封圈 试验工装 

分 类 号：TE27[石油与天然气工程—油气井工程]