Diamond bits require lower WOB,high rotary speed and small flow rate,useful for hole straightening and inclining prevention,and it can be used high-density drilling fluids.But diamond bits can′t effectively drill heterogeneous hard formations which contain chert,pyrite and silicastone.

金剛石鉆頭的鉆壓小免费黄色片你懂的、轉速高欧美性XXXXX精品、排量小，有利于糾斜防斜456精品视频，可在高密度鉆井液條件下使用99riav2.com，但它不能有效地鉆進含燧石、黃鐵礦和硅質的不均質堅硬地層我要看操逼A片。

The cost of MRC technology is lower than that of single horizontal well. It can drill two or multibranch hole from one major bole and encounter the pay zones in different positions, which improves the drilling-in capability and effective area and increases the oil and gas production of individual well.

MRC技術除具有水平井的常規(guī)優(yōu)勢外黄片视频免费在线观看，其成本比單個水平井低，它是在一個主井眼中鉆出兩個或多個分支井眼一级美女操逼视频，從而鉆遇多個不同空間位置的產層日韩美欧自拍视频播放网站在线播放，增大儲層鉆穿幾率和有效面積，進而提高單井油氣產量扒开腿做爽爽a爽爽的视频。

Make a small hole in something as a guide for a drill .

在某物上做一個小孔国产在线观看福利，好像為鉆孔機做向導。

E. Drill a φ4.5 pilot hole every 300mm on the guiding track, and make countersinking.

E黄色av免费观看。 在導軌上每相隔大約300mm鉆一個φ4.5通孔黄色成年人亚洲，并鉆出沉頭孔。

Drill a 4.5 pilot hole every 300mm on the guiding track, and make countersinking.

在導軌上每相隔大約300mm鉆一個φ4.5通孔女老师高潮喷水，并鉆出沉頭孔婷婷操操b。

D.Drill a 4.5 pilot hole every300mm on the guiding track, and make countersinking.

D。將夾板與插片連接在一起一级毛黄片，使夾板夾緊門扇欧美韩一区二区黄片。

In addition, it is also used to drill small size water well and high-pressure jet grouting hole.

此外，它也可以用來演習規(guī)模小水井和高壓噴射灌漿孔a一级毛片精品免费视频A片。

Abstract］ objective to study the chronic subdural haematoma pathological mechanism characteristic,curing method and factor failing.methods the method carries on a clinical research to 217 sufferers and the whole set goes skull ct to scan.for the very first time surgical operation method all for drill a hole to lead to drainage.results cured 193 cases (88.94%),haematoma residual 9 cases (4.15%),haematoma recrudesces 15 cases (6.91%).conclusion procedure selection should be based on condition of the patients with hematoma,drainage completely and anti-pneumo encephalos may important.

摘要］ 目的探討分析慢性硬膜下血腫的病理特點网站日韩在线、治療方法和失敗因素。方法對217例患者進行臨床研究又大又长又租又爽的在线视频，全組均行頭顱ct掃描欧美色欧美亚洲另类少妇。首次手術方式均為鉆孔引流術。結果恢復良好者193例（88.94%）人人操,人人干,人人摸，血腫殘留9例(4.15%)男女拍拍拍AAA毛片免费视频，血腫復發(fā)15例(6.91%)。結論對慢性硬膜下血腫的治療應根據(jù)病情選擇手術方式超碰人妻人人操人人干，術中血腫沖洗要徹底及術中術后要預防氣顱的發(fā)生性插20分钟免费视频，可降低術后血腫復發(fā)率爆乳美女粉泬10p福利视频。

Some superhighway bridges project, drill bore concrete riles are used for foundation. Due to the varilation of geology located is great, in parts of faults mixed withdissolving hole etc. the foundation of main bridge 8 m deep construction is difficult.

某快速路工程有若干座橋梁，采用鉆孔灌注樁基礎日韩片无码观看网站免费，共112根久久这里只精品免费，樁徑φ1.0m、φ1.5m及φ1.8m三種手机看片1024人妻金沙，樁長4.4～51m羞羞免费网站，由于地質條件變化大，部分地層中有斷層夾泥與溶洞等不良地質免费看的A片资源网站，主橋樁基位于深約8m的水中最新国产成人野战视频在线观看免费，具有一定的施工難度。

The design features of Model A and Model B double bend downhole drill motor for horizontal hole sidetracking is analyzed by the energy method.

采用能量法分析了A91社区色综合、B兩種型號側鉆水平井雙彎殼體動力鉆具的結構特性三级做a全过程在线观看视频，給出了鉆具彎曲變形與井壁壓力、鉆頭造斜力亚洲色图一区二区三区、井眼幾何尺寸的關系精选搞黄色视频的网站，討論了在直井眼內的下入問題。