Abstract : tight trips often occur for hole undergauge during drilling in east sichuan oilfield. the paper analysis the causes of hole undergauge, proposes preventive and treatment measures which are to optimize design from geologic structure features, to use suitable fluid column pressure, to select different drilling fluid types, to adopt advanced drilling technology and perfect field technical management. therefore, good economic benefit will be obtained
文摘:川東構造在鉆探作業中因井眼縮徑造成起下鉆的阻卡時有發生，文中對造成井眼縮小的原因進行分析並劃分為五類因素，提出應在地質構造特徵方面優化設計，採用合適的液
柱壓力，選擇不同的鉆井液類型，使用先進的鉆井工藝和完善現場技術管理等措施進行預防和處理，將取得重大的經濟效益。
Mercury absolute pressure
水銀
柱壓力
In chapter three, in order to simulate the actual drilling fluid column pressure and to supply the extreme high pressure drilling circulating fluid for the device, the high pressure circulating fluid simulating system has been designed based on the experience of drilling fluid circulating system in the wellside. to purify the drilling fluid, the high pressure desander has been designed
第三章為模擬實際鉆井的液
柱壓力，並為整個模擬鉆井裝置提供超高
壓循環鉆井液，在借鑒了鉆井現場的鉆井液循環系統經驗的基礎上分析研究了鉆井液高
壓循環系統，並配套設計了高
壓除砂器，以達到凈化該系統中鉆井液的要求。
This paper is concerned with the analysis of lateral braces for workshop columns press - bend member. in this paper, lateral braces is lateral horizon center braces
本文研究的課題為廠房
柱壓彎構件側向支撐桿的分析，其中，側向支撐桿指的是側向水平中心支撐桿。
Standard practice for use of unbonded caps in determination of compressive strength of hardened concrete cylinders
測定混凝土筒
柱壓強用不粘合蓋板的使用標準規程
On the basis of analyzing the rock mechanics, the bit working circumstance and property in the bottom hole of 6000m deep well, and making use of the former equipment such as a derrick, platforms etc, the paper demonstrates that the research and design of the mechanical device have been established including the high pressure simulating well bore, the high pressure connector between the static well bore and the rotating drill pipe, the high pressure simulating system of circulating fluid and the high pressure desander etc. the produce, control and dynamic analysis of the bottom hole four - dimensional pressure ( over burden, confined, pore and column pressure ) have been studied
本文在對井底巖石的受力狀態以及鉆頭的工作環境和特性加以分析的基礎上，藉助原有的井架、平臺等設備，研究設計了模擬6000米井底
壓力壞境的高
壓模擬井筒、鉆
柱高
壓轉聯器、鉆井液高
壓模擬系統以及高
壓除砂器等機械裝置，並研究了井底四維模擬
壓力（上覆
壓、圍
壓、孔隙
壓和液
柱壓）的產生、控制及其控制的建模與模擬，從而實現井深至6000米的四維井底
壓力環境的模擬。
Voltage drop in arc column
弧
柱壓降
Experimental research on behaviors of pressure and bending loaded circular steel tube columns filled with steel - reinforced concrete
鋼管混凝土組合
柱壓彎性能試驗研究
Straight - sided power presses - characteristics and dimensions
閉式雙
柱壓力機.特性和尺寸
Hydrostatic column pressure difference
靜液柱壓差
