powder pocket

On the Rectification and Strengthening of Underground Safety of Non-coal Mines;

论非煤矿山的井下安全整治

Treatment of underground outer source fire of coal mine;

煤矿井下外源火灾的处理

Danger analysis and management technology for underground working place of Chengchao iron mine;

程潮铁矿井下作业场所危险分析及管理技术

Research and shop tests of the downhole casing shut-off valve;

井下套管阀研究及室内试验

Theory design of downhole ultrasonic focusing system;

井下超声聚焦系统的理论设计

Preliminary approach to oil production through downhole oil-water separation technique.;

井下油水分离采油技术初探

A mechanical floating is used because of instrument,water quality and down hole tools that make in-correct result measured or instrument blocked down hole.

介绍了一种用于油田注水井注水分层测试超声波井下流量计。

In the light of the serious erode situation of down hole stems,hanging ring technology for erode monitor to oil well dill stem in Lunnan oilfield has been used.

针对井下管柱腐蚀严重的情况 ,轮南油田采用了井下挂环技术对油井管柱的腐蚀状况进行监测。

Since the function of separation,the oil is pumped to ground and water injected to down hole.

有杆泵井下油水分离装置由静态旋流分离器和抽油注水双作用泵 2部分组成。

Study on scheme of IF mobile communication in coal mine underground;

煤矿井下中频移动通信技术方案研究

The status of mobile communication in coal mine underground is introduced, the difficult technical problems including laneway infection for wireless transmission and weak signal reception and noise interference are analyzed, and ways to solve these problems are proposed.

介绍了我国煤矿井下移动通信现状,分析了技术上的难题-巷道对无线传输的影响、弱信号接收和井下环境噪声干扰,提出了解决途径。

HPHT downhole switching valve is developed.

研制的高温高压井下开关可在注汽时打开注汽通道;油井作业时关闭注汽通道。

Research and application of downhole choke to prevent hydrate generation in gas wells;

井下节流防治气井水合物技术研究与应用

Downhole choke technology is to adjust downhole pressure through installing the choke in an appropriate position on the tube.

气井井下节流工艺是将节流器置于油管的适当位置来实现井下节流调压,利用地热对节流后的天然气加热,改变天然气水合物的生成条件,对防止水合物生成起到了积极作用。

Aiming at this productive problem,downhole choke engineering research was developed.

主要针对高压气井冬季易堵、存在较大安全隐患的生产难题,开展井下节流工艺技术研究。

Before borehole operation in gas well, the temporary blocking agent is squashed the near pay formation to make reservoir pressure keep changelessness, formation isn′t polluted by kill fluid in well bore.

在天然气井进行井下作业前,将暂堵剂挤入生产层位附近,以暂时封堵生产层,使地层压力不被释放,井筒内的压井液不污染地层,待施工作业结束后,及时进行解堵,确保天然气井不受伤害或少伤害,从而恢复天然气井的生产能力。