annulus pressure firing 环空加压引爆
downhole annulus pressure 井下环空压力
annulus pressure differential 环空压差
annulus pressure to execute 环空加压引爆
annulus pressure firing system 环空压力
annulus pressure response tool APR 工具
annulus s pressure 环空压力
Basing on the small annulus pressure，lightweight string，packer operation difficult of ultra-shallow well layer test，the paper analyzes all kinds of testing tools' features and designed a set of testing process technology to test tool performance，column structure，and working system.
针对超浅井地层测试中因环空压力小、管柱重量轻、封隔器坐封难、开关井操作难的问题，分析了各测试工具的性能特点，设计出一套解决测试工具性能、管柱结构和工作制度的超浅井地层测试工艺技术。 认为计算好封隔器所需钻压及油管、钻杆数量，保证封隔器坐封严密，减少开关井次数是测试成功的关键。
参考来源 - 大庆油田浅井地层测试工艺浅议—《价值工程》—2010年第36期—龙源期刊网·2,447,543篇论文数据，部分数据来源于NoteExpress
Moreover, the wellbore annulus pressure increased with the increasing of invaded formation water quantity. but the amplitude is not obvious.
此外，井筒环空压力也随着地层水侵入量的增加而增大，但增幅不明显。
Based on field investigation and statistical data, the relation plate of annulus pressure differential, interlayer differential and cementing quality is plotted.
结合现场调查和统计规律，建立了环空压差和层间压差与固井质量的关系图版。
Without keeping annulus pressure to static and instead of special metering by simple mechanical pressure ba lance structure, this valve is conducted by annulus pressure.
该阀采用环空外压操作测试阀的开关，不需要保压，而且采用简单的机械压力平衡机构代替了专用计量套。
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