56排水型可溶节流器的研制与应用  

Development and Application of 56 Drainage Type Soluble Choke

作　　者：孙艳萍[1] 赵勇 王维[2] 赵朕浩 沈德来 屈文涛[1] Sun Yanping;Zhao Yong;Wang Wei;Zhao Zhenhao;Shen Delai;Qu Wentao(Mechanical Engineering College,Xi'an Shiyou University;No.3 Gas Production Plant,PetroChina Changqing Oilfield Company)

机构地区：[1]西安石油大学机械工程学院,陕西省西安市710065 [2]中国石油长庆油田分公司第三采气厂

出　　处：《石油机械》2024年第12期81-88,共8页China Petroleum Machinery

基　　金：国家自然科学基金项目“钛锆铌基高温形状记忆合金相变机制及热循环稳定性”(52071261)。

摘　　要：为解决井下节流器因卡定机构腐蚀抱死、胶筒老化变形及节流器上方积液严重等原因导致的节流器无法打捞的问题,研制了56排水型可溶节流器。该节流器利用涂覆涂层的镁铝合金制成卡瓦下座,用水溶性橡胶制成水溶性胶筒,并新增排水结构,通过注入溶解液的方式溶解卡瓦下座及用水溶解胶筒,可以有效解决卡定机构腐蚀抱死以及胶筒难解封的问题,打开排水滑套排液可解决节流器上方积液问题。经室内试验检验,其可溶卡瓦下座材料在原液中耐腐蚀速率为0.0536 mm/a,在20%质量分数盐酸中的溶解速率为2296.38 mm/a;水溶性橡胶在56℃的原液中溶解速率为2370.73 mm/a;排水机构的排水速率为833 cm^(3)/s。在桃X井等8口井现场应用表明:研制的56排水型可溶节流器其耐温、承压、耐腐蚀、密封和解封性能均满足设计要求,施工时可顺利完成排液、注酸工作,同时溶解解封效果良好,可溶节流器打捞成功率为100%,该节流器适用于Φ73.0 mm油管的水平井及定向井。研制技术与产品可为井场后续大规模应用与产品系列化提供有力的技术支撑。In order to solve the problem that the downhole choke cannot be fished due to corrosion and locking of the locking mechanism,aging and deformation of the rubber barrel and severe liquid loading above the choke,a 56 drainage type soluble choke was developed.In the choke,the coated magnalium was used to make the lower seat of the slip,the water-soluble rubber was used to make the water-soluble rubber barrel,and a drainage structure was added.In this way,the problems of corrosion and locking of the locking mechanism and difficult unsetting of rubber barrel can be effectively solved by injecting a solution to dissolve the lower seat of the slip and water to dissolve the rubber barrel;moreover,the problem of liquid loading above the choke can be solved by opening the drainage sliding sleeve to discharge liquid.The laboratory test shows that the corrosion resistance rate of the soluble lower seat of the slip in the stock solution is 0.0536 mm/a,and the dissolution rate in 20%concentration hydrochloric acid is 2296.38 mm/a;the dissolution rate of water-soluble rubber in the 56℃stock solution is 2370.73 mm/a;and the drainage rate of the drainage mechanism is 833 cm^(3)/s.The field application in 8 wells such as Well Tao X shows that the temperature resistance,pressure resistance,corrosion resistance,sealing and unsetting performance of the developed 56 drainage type soluble choke meet the design requirements.During construction,it can smoothly complete the drainage and acid injection work;meanwhile,the dissolution and unsetting effect is good,and the success rate of fishing is 100%.This choke is suitable forΦ73.0 mm tubing in horizontal and directional wells.The developed technology and product provide strong technical support for the subsequent large-scale application at well site and serialization of the product.

关 键 词：井下节流器 水溶性胶筒 镁铝合金 涂覆涂层 溶解解封 

分 类 号：TE931[石油与天然气工程—石油机械设备]