缝隙喷射隔离:新一代无炸药补救技术

Gary McWilliam, Alex Lucas, Keith Gaskin, Lars Jacobs, Steve Macpherson, Björn Ullbrand, Dave Molony
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引用次数: 0

摘要

SJI (Slot-Jet-Isolate)系统是一种新开发的无爆炸物、低占地面积的修复技术,可在各种应用中灵活地修复和测试具有挑战性的环空。在行业赞助商的支持下,执行了广泛的全面测试计划,以证明Slot, Jet, Isolate (SJI)概念的有效性。在完全固井的套管上进行了测试,以确认开槽系统与环空建立液压连接的能力,即使是最具挑战性的环空,也不属于传统系统的范围。这些知识已被应用于进一步提高切削齿的功率和工具的稳健性,并在最初的现场部署之前确定作业限制。在第一阶段测试取得成功后,该工具被应用于英国大陆架的一家作业公司,在环境桥塞设置之前,成功地将四口海底井的套管开槽,并将油基泥浆从环空中置换出来,从而消除了对炸药的需求,并且比现有方法更有效地成功进行了作业。自第一次应用以来,该工具随后也被应用于荷兰海上的套管槽,在弃井作业中,在拔出套管之前,清洗和清除环空固体。通过使用连续油管,该技术在未来完全无钻机部署方面的潜力也得到了证实。本文将介绍SJI系统是如何在行业合作伙伴的有效合作下开发出来的,如何在短短18个月内从概念成熟到成功的现场部署,并将进一步展示如何将这种灵活的技术配置到实际的套管回收应用中,以及它未来的预期应用于环空水泥修复井塞和弃井(P&A)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Slot-Jet-Isolate: A Next-Generation Explosives-Free Remedial Technology
The Slot-Jet-Isolate (SJI) system is a newly developed, explosives-free and low-footprint remedial technology designed for full flexibility in the remediation and testing of challenging annuli for a variety of applications. An extensive full-scale testing programme was executed with the support of industry sponsors to demonstrate the effectiveness of the Slot, Jet, Isolate (SJI) concept. Testing was performed on fully-cemented casings to confirm the ability of the slotting system to develop a hydraulic connection with the annulus for even the most challenging annuli not previously within the envelope of traditional systems. The learnings have been applied to further enhance the power of the slotting blades and robustness of the tool, and determine operational limits prior to initial field deployment. Following the success of the first phase of testing, the tool was deployed for an operator in the UKCS to successfully slot casing and displace oil-based mud from the annuli of four subsea wells prior to the setting of environmental plugs, removing the need for explosives and successfully conducting operations more efficiently than the established approach. Since this first application, the tool has subsequently also been run offshore Netherlands to slot casing to facilitate washing and removal of annular solids prior to pulling casings during P&A operations. The potential of the technology for future fully-rigless deployment via the use of Coiled Tubing was also confirmed. This paper will report on how the SJI system was developed with the help of effective collaboration between industry partners to accelerate its maturation from concept to successful field deployment in only 18 months, and will further demonstrate how this flexible technology may also be configured for applied casing recovery applications, in addition to its future intended application to annular cement remediation for well plug and abandonment (P&A).
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