Drilling with cone( drag) bit in the section.

此段地层采用牙轮（刀）头钻进。

youdao

This paper discusses the procedures of DTH hammer and core drilling with casing.

本文主要论述了空气潜孔锤跟管取心钻进规程。

youdao

Drilling with DTH can achieve high efficiency in rock and soil drilling engineering.

潜孔冲击器钻进是岩土钻掘工程中的一种高效钻进方法。

youdao

One day,a salesman came to the work area with a new drilling machine powered by steam.

VOA: special.2010.09.04

Switzer says that the industrial nature of gas drilling, with heavy truck traffic and noise, and occasional wastewater and chemical spills,has transformed their peaceful country life.

VOA: standard.2010.01.02

They allege that the company's drilling polluted their water with chemicals,metals and methane, the main constituent of natural gas, causing explosions as well as gastrointestinal and neurological illness.

VOA: standard.2010.01.02

But if their case is rejected it will force Transocean to halt work on 10 wells it is drilling with Petrobras.

FORBES: Thumbing Nose At Brazil, Chevron Is Near Deal With Argentina's YPF

That cadre endures a month of tough drilling with Webb, learning her techniques and sensibilities, as well as how to teach her method to new hires.

FORBES: Drybar: How One Woman And A Hair Dryer Became A $20 Million Operation

The story begins in 1992, when an army unit from Lanzhou in neighbouring Gansu province, drilling with state permission, made a decent oil find in Jingbian county.

ECONOMIST: In rural China, a private oil boom became a state-owned one