钻井

As more and more coal mines are excavated , the workload of artesian well increase gradually year after year , expeditiousness,science and safety of artesian well become a challenge against the technique of construction.

随着大量煤炭资源的开发，煤矿钻井作业的工作量逐年加大，快速、科学、安全钻井对钻井施工的技术提出了更高的要求。

The computational formula on pressure increment in bottomholes affected by drilling speed is deduced as well.

首先利用在钻井过程中随钻测量起钻后地面回旋的方法，自行研制开发出能够抗180℃高温，具有抗震功能的测量仪器；其次，在原有模型基础上，利用实例数据进行分析，考虑固相和多相流加速度压降的影响，研制开发了流钻欠平衡钻井环空多相流井底压力的计算模型，并推导出机械钻速影响井底压力增量的计算公式；最后，为验证模型精度，开发了钻井监测与分析计算软件，软件计算结果与实测数据叶比，误差小于3%。

It is pointed out that the essential drilling problem is the unsuitability of the drill pipe,drill collar,drill bit and drilling equipment for the needs of deep large diameter wellbore drilling.

在系统分析了大直径井段中普遍存在的钻井问题的基础上，指出当前深井大直径钻井技术的根本问题，是钻具、钻头、钻井装备与大直径井眼的工艺要求不相适应。

This article analyzed the stress and vertical stress integral curve of the core of bottom hole through finite element software,we found the rock of the bottom hole was " convex" during gas drilling ,and the effecting scope of the down stress was large than the conventional drilling fluid.

采用气体钻井时机械钻速较高，目前已被钻井界普遍认可；但对气体钻井是如何提高机械钻速的研究还不多。

In order to clarify the type, the causes and the mechanism of the sealing failure, and the further improve the working life of the seal rings of drilling mud pump plunger, this paper analyzed the seal failure of myriameter drilling mud pump plunger.

为了弄清高压钻井泥浆泵柱塞密封圈的失效形式、原因及机理，进一步提高钻井泥浆泵柱塞密封圈的寿命，对万米钻井泥浆泵柱塞密封失效分析。

During the process of the automatic drilling,iron roughneck is the most developed equipment of pipe handling operation and one of the most important automatic equipment which can complete connection of the pipe,casing and other equipmenu and improve the safety and efficiency in oil production.

随着现代化钻井的进程，钻井设备的自动化程度在不断提高，钻具的扭矩旋扣设备也在不断升级换代，从手动吊钳、液气混合动力大钳发展到现在最先进的铁钻工，自动化的旋扣设备在提高钻井生产效率和安全性等方面起到了重要的作用。

Hydraulic dive drilling pump adopts variable hydraulic pump and dynamic cylinder as its power end and its fluid end is identical with the triplex single-acting piston pump.

摘 要 液压驱动的钻井泵采用变量液压泵和动力油缸组成液压钻井泵的动力端；液力端和现在使用的三缸单作用活塞式钻井泵相同。

According to the present application, pointthebit is the development tendency of rotary steerable drilling system.

井下旋转导向钻井工具是旋转导向钻井系统的核心部件，从应用情况来看，指向式旋转导向钻井工具是发展的趋势。

On a whole, the instruments of both home and foreign made can be unproved in working principals and methods.

本文针对以往国内钻井参数仪表存在的问题，参考当今国际先进水平，对钻井参数的建模和测量方法进行了研究，并在此基础上运用现场总线、客户／服务器等新技术研究开发了一套精度高、功能齐全、界面美观友好的实时多参数钻井监测系统。

Considering gas-solid flow in annular space and BoYun Guo's hydrodynamic parameters model, For aired underbalanced drilling, combined with the minimum energy Angel law and based on the mininum gas injection scale at the key points, it is established a bottom-hole pressure model for gas-solid two phase stream; meanwhile, calculated the downhole depth of the Downhole-Deployment-Valves; and then fabricated the corresponding calculation software. For streamingly underbalanced drilling, it is fully given a step-by-step solution based on analysis from the relationship of various wellbore pressures at the course of underbalanced drilling as well as from the streaming behavior in different wellbore sections, adding consideration on multiphase stream pressure drop and Downhole-Deployment- Valve into account, it is of common application for development wells.

对于气体欠平衡钻井，考虑环空为气固两相流，参考BoYun Guo的流体力学参数计算模型，结合Angel的最小动能法标准，从满足关键点处的最小注气量入手，建立了气固两相流的井底压力计算模型，同时对套管阀的下入深度进行了计算，并利用VB语言编制了相应的计算软件；对于液体欠平衡钻井，考虑环空为多相流，在充分分析欠平衡钻井井内基本压力关系的基础上，从环空多相流压降分析入手，通过对井筒内各段的流态分析，逐段求解。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。