中国石油网消息：8月30日，从川庆钻探长庆井下公司传来消息，这个公司顺利完成合H70-9井3095米长水平段连续油管钻塞作业，刷新了国内页岩油最长水平段连续油管钻塞纪录。目前，这口井已进入采油阶段。

China Oil News: On August 30th, it was reported from Chuanqing Drilling Changqing Downhole Company that this company successfully completed the continuous tubing plug drilling operation for the 3095-meter-long horizontal section of Well H70-9. This has set a new record for the longest continuous tubing plug drilling section in domestic shale oil. Currently, this well has entered the production stage.

合H70-9井水平段与垂直段长度的比例达到2.1，水平段长度达到3095米。面对挑战，川庆钻探长庆井下公司有针对性地开展技术攻关，克服井筒轨迹复杂、地层漏失、连续油管下入摩阻大等困难，利用连续油管及配套设备清洁井筒，钻磨全部37个桥塞并清理积砂至人工井底，恢复了井筒通道。

The ratio of the length of the horizontal section to the vertical section of the H70-9 well reached 2.1, and the length of the horizontal section was 3,095 meters. Facing the challenges, the Longqing Downhole Company of Chuanqing Drilling Company carried out targeted technical research and development, overcoming difficulties such as complex wellbore trajectory, formation leakage, and high friction during the lowering of the continuous tubing. They used the continuous tubing and its supporting equipment to clean the wellbore, drilled and ground all 37 bridge plugs, and cleared the accumulated sand to the artificial bottom of the well, restoring the wellbore passage.

施工前，技术人员使用软件对“连续管+水力振荡器+钻磨工具串”进行了下入深度模拟，精准制定作业方案。同时，现场组织相关方进行技术交底，明确工序、职责与风险防控措施。施工中，技术团队创新采用“氮气泡沫+振荡牵引”高效清洁作业模式，集成多功能氮气泡沫发生装置，实时调整泡沫密度和排量，配合金属减阻剂有效减少管柱摩阻。

Before the construction, the technicians used software to simulate the lowering depth of the "continuous pipe + hydraulic oscillator + drilling and grinding tool string", and precisely formulated the operation plan. At the same time, on-site, relevant parties were organized to conduct technical briefings, clearly defining the procedures, responsibilities and risk prevention measures. During the construction, the technical team innovatively adopted the "nitrogen foam + oscillation traction" efficient cleaning operation mode, integrating multi-functional nitrogen foam generating devices, adjusting the foam density and flow rate in real time, and combining with metal drag reducer to effectively reduce the friction of the pipe string.

作业历时4天，起下2个周期，经历4次回拖，最大下入深度达5200米。技术团队全程严格执行分段梯度清扫工艺要求，每钻磨300至400米就回拖至井斜30度以上循环至无砂。此次施工采用“4+1+1”标准化作业流程，单井施工周期由以往的6至7天压缩到3至4天，施工效率大幅提升。

The operation lasted for 4 days, involving 2 cycles. It experienced 4 instances of retraction. The maximum downhole depth reached 5200 meters. The technical team strictly followed the segmented gradient cleaning process requirements throughout the operation. Every 300 to 400 meters of drilling and grinding, they would retract to a well deviation of over 30 degrees and cycle until there was no sand. This construction adopted the "4+1+1" standardized operation process. The single-well construction period was reduced from the previous 6 to 7 days to 3 to 4 days, significantly improving the construction efficiency.

此次合H70-9井钻塞作业的成功实施，标志着川庆钻探长庆井下公司在长水平段连续油管作业领域取得重要突破，形成了适用于高水垂比页岩油井的连续油管钻塞配套技术。

The successful implementation of the plug-setting operation in the H70-9 well marks a significant breakthrough for Chuanqing Drilling Changqing Well Intervention Company in the field of continuous tubing operations in long horizontal sections, and has formed a continuous tubing plug-setting supporting technology applicable to shale oil wells with high water-to-pore ratio.