|
CN104763361A
|
|
Mixing ventilation type sealed drilling fluid separation system
|
|
CN104727763A
|
|
Fixing method for double protecting drill pipe elevator
|
|
CN104747105A
|
|
Screening method for vibrating screen special for sulfur-contained oil and gas field
|
|
CN104763362A
|
|
Closed sieving device for high-sulfur-content containing oil-gas field drilling liquid
|
|
CN104707387A
|
|
Sulfur removal method of closed vibrating screen for high sulfur oil-gas fields
|
|
CN104632108A
|
|
Gas circulation drilling fluid screening device
|
|
CN104712271A
|
|
Screening process of airtight vibrating screen for petroleum drilling fluid
|
|
CN104727769A
|
|
Drilling fluid screening work process based on gas circulation system
|
|
CN104624538A
|
|
Surface processing device with rust remover convenient to completely remove rust for drill stem
|
|
CN104763353A
|
|
Petroleum drill rod for deep well drilling and with wear resisting layer
|
|
CN104625932A
|
|
Rust removing device for cleaning outer wall of petroleum drilling rod
|
|
CN104727761A
|
|
Oil drill pipe with protective structure and machining process of oil drill pipe
|
|
CN103895001A
|
|
Petroleum pipeline machining marking device allowed to be assembled and disassembled
|
