The distinction of the PDC bit balling and its features of mud logging parameters
PDC钻头泥包的识别及其录井参数特征
To solve the problems of borehole wall instability and bit balling in the deviated section of horizontal gas wells,a biological polysulfonate potassium drilling fluid is developed and applied to 15 horizontal gas wells in Changqing Gasfield.
为解决长庆气田天然气水平井施工中位于斜井段位置的井壁失稳和钻头泥包技术难题,室内研究了复合钾盐生物聚磺钻井液体系,并在长庆地区15口水平井应用。
The distinction of the PDC bit balling and its features of mud logging parameters
PDC钻头泥包的识别及其录井参数特征
Analysis on balling up caused by helicoid hydraulic motor bypass valve failure in combined drilling technology
复合钻井过程中螺杆钻具旁通阀刺漏造成钻头泥包分析
Analysis on PDC Bit Balling Characteristics in Erdos Work Area and the Preventive Measures
鄂北工区PDC钻头泥包特征分析及预防措施
Anti-bit balling for PDC bits of horizontal wells in Changqing gas field
长庆气田水平井PDC钻头防泥包技术
In drilling an oil well, mud is used to lubricate the cutting bit.
钻油井时，泥浆被用来润滑钻头。
She took the Bread-knife, and picked and Bored at the mortar of a stone, and when she was tired, the waiting-maid took her turn.
她拿出了切面包的刀子,在石头缝的泥灰中使劲地挖呀钻呀,累了就让侍女接着干。
a series of tube (joined by screwed collars) that connects a drilling platform to the drilling bit; rotates the bit and supplies drilling mud.
一系列管子（由保险螺丝连成的）把钻探平台连到钻头的一系列管子；转动钻头和提供钻泥。
drill ,interchangeable, of base metal, for hand or machine tolls (excl. those for rock drilling or earth boring)
钻头,可互换式,贱金属制,手工具或机床用（不包括凿岩或钻土用钻机）
a mixture of clays and water; pumped down the drill pipe to lubricate and cool the drilling bit.
泥土和水的混合物，顺钻杆而下，起润滑和冷却钻头的作用。
As the diamond tip of the drill revolves, it is lubricated by mud.
在钻机的金刚钻头旋转的时候，泥浆便进行了润滑。
unit-type drill head
组合钻床钻头, 标准钻头
joint for tubing of asbestos (excl. of asbestos cement)
石棉管道接头（不包括石棉水泥制的）
marine bivalve that bores into rock or clay or wood by means of saw-like shells.
用它锯一样的壳在岩石、泥土或木头中钻洞的海生双壳类动物。
Research and Application of Bits for Drilling in Elastic-plastic Dense Mudstone of In-situ Leaching Sandstone Uranium Deposit
地浸砂岩型铀矿弹塑性致密泥岩钻头的研究与应用
drill(ing) head
钻头; 主轴头; 钻床床头箱; 钻削动力头;钻头头部, 钎头
part of a drill that grips the bit
夹头（钻或钻床上用以夹住钻头的部分）.
a small bit that drills a first hole to guide a larger drill.
钻凿初洞来导引大钻头的一种小钻头。
easing the bit in
钻头轻压慢转钻进地层