With the development of the oil
industry as well as increasing demand for energy , oil drilling -related
technologies have continued to emerge . Early oil drilling mainly human impact
drill, drill machinery Dayton , rotary drilling , etc., at a selected location
down or side surface drilled to a diameter of the cylindrical bore underground
reservoir .
This type of high-pressure pneumatic
drill,cone drill hole drilling and the like , can be used with carbide ball
gear used in order to achieve improved drilling efficiency and prolong the
service life of the drill purposes. At present,researchers through in-depth
studies to find a more efficient high-pressure abrasive water jet technology as
well as the deep edge of the reservoir exploitation . High pressure abrasive
water jet is high pressure water jet as a carrier, adding a certain amount of
abrasive particles,such that the impact force jet has been greatly enhanced,but also makes for rock cutting efficiency has been greatly improved,with a
more broad application prospects.
Tungsten carbide nozzle is playing an important role
in the high-pressure abrasive water jet which has high hardness,
high strength and excellent wear and corrosion resistance .
Usually in the oil drilling process,in general, it is
in a high-confining pressure environment,and thus the nozzle during operation
need to withstand high-speed impact of high pressure abrasive and thus more
prone to wear and failure.Common materials,such as steel nozzle,prone to chipping
or thermal deformation,requiring frequent replacement of the nozzle,thereby
reducing the efficiency of drilling.Especially when for deep drilling,remove
and replace the drill bit is extremely inconvenient.
Also,most likely to occur in the nozzle wear parts of cemented carbide material
mosaic it is an improved nozzle performance and extend its life approach.In the
preparation of tungsten carbide nozzle through Shihai WC grain size such that
it is reduced without lowering the toughness of the nozzle case to further improve
the hardness and wear resistance corrosion resistance.
