The main feature of the annular preventer (Fig. 2), sometimescalled s'universal" or "bag''-type BOP, is the capability to close and seal on almost any size tools in the borehole-drillpipe, tooljoints, drill collars, kellys, easing, etc.-within most of its range, It also has the capability to seal off the open hole, The heart of the annular preventer is the sealing element Fig.

環(huán)型BOP's 環(huán)型防護設(shè)備的The主要特點(圖2)色综合国产中文视频a区， sometimescalled s'universal&或者&bag''-type BOP免费观看亚洲黄片，是關(guān)閉的能力高清无码黄在线，并且在幾乎任何大小工具的封印在鉆孔鉆桿另类自拍日韩在线视频观看、鉆具接頭三级爆乳黄片在线看、鉆環(huán)日韩在线观看视频欧美在线一区二区， kellys，緩和等等-在大多數(shù)它的范圍之內(nèi)爱爱视频a，它也有封鎖的能力開放孔偷拍自图，環(huán)型防護設(shè)備的心臟是密封件(圖3)。

According to the spot experiment result of bolt anchor-hold in the condition of draining water in the roof on haulage roadway, 11201 coalface, Chengjiao coalmine, the test facility was designed independently and the influence of the anchor-hold of the resin bolt by the draining water in the drill hole was studied.

結(jié)合城郊煤礦11201工作面運輸巷頂板淋水情況下錨桿錨固力現(xiàn)場測試結(jié)果色偷偷66，自行設(shè)計了實驗裝置久久免费精彩视频，研究了鉆孔淋水對樹脂錨桿錨固力的影響。在現(xiàn)場測試中，當鉆孔的淋水量小于128mL/min時欧美综合日韩精品一区福利，樹脂錨桿的錨固力保持不變给我找一个播放一个黄片儿；當淋水量大于583mL/min時，樹脂錨桿的錨固力比無淋水時的錨固力下降35%以上久久这里才有精品。沿巷道軸向布置卸水孔欧美日韩AA在一二区，采用集中排放，同時加大錨桿支護的密度可以改善頂板淋水時錨桿支護的效果

Employing modern deep drilling techniques, Chinese Continental Scientific Drilling Project is to drill a 5000 meter deep hole in the eastern part of Dabie-Sulu ultra-high pressure metamorphic belt that has global geoscientific significance.

中國大陸科學鉆探工程(Chinese Continental Scientific Drilling Program性xxxx欧美20，CCSD)是利用現(xiàn)代深部鉆探高新技術(shù)日本特黄特级AA片免费观看，在具有全球地學意義的大別-蘇魯超高壓變質(zhì)帶實施中國第一口5000米科學深鉆，利用從鉆孔中獲取的巖心及液可以直接进入毛片的网站、氣態(tài)樣品及原位測量數(shù)據(jù)无码视频一区二区三区无码，進行多學科綜合研究日本亚洲网站，揭示大陸造山帶的深部物質(zhì)組成與結(jié)構(gòu)構(gòu)造国产精品拍在线天天更新，重塑超高壓變質(zhì)帶形成與折返機制，探索深部流體與生物圈欧美在线网址，檢測現(xiàn)代地質(zhì)運動国产精品黄色视频哪里有，建立長期的地下觀測實驗站及地殼深部物質(zhì)研究基地。

This design has analyzed the wheel hub drill hole specification , according to the vertical multiaxle drilling machine combination computer characteristic and the requirement, carries on its hydraulic system design, it introduces emphatically this kind of drilling machine combination computer hydraulic system principle of work, the hydraulic ram design, the integration block design and the integration block loading and the hydraulic pressure pumping station design.

本設(shè)計在分析了輪轂鉆孔技術(shù)要求的基礎(chǔ)上久久久久毛片一级录像，根據(jù)立式多軸鉆床組合機的特點和要求日韩可以在线观看的黄色网站，進行它的液壓系統(tǒng)設(shè)計，重點介紹這種鉆床組合機的液壓系統(tǒng)工作原理黄色网站视频观看、液壓油缸的設(shè)計无码国产网、集成塊設(shè)計和集成塊裝配及液壓泵站的設(shè)計。