Category Archives: Science

14 Apr

The Process Of Borehole Drilling Explained

home-page-splash5

Oil and gas borehole drilling implies using rotational method exclusively, carrying the rock particles to the surface through circulating fluid jet. Depending on the location of the engine the drilling techniques are divided into two major groups: rotor drilling, when the engine is installed on the surface, activating the drill bit at the bottom by rotating the entire drill string and downhole motor drilling that demands using a drill motor or turbine when the engine is located close to the borehole above the drill bit.

In classical geophysics the drilling process includes the following aspects: tripping operations (descending drill pipe with a chisel into the wellbore to the bottom and lifting it with the exhaust bit) and the actual drilling at the bottom of a bit (bit rock failure). These operations are interrupted periodically for installing the casing in the well, designed to protect the borehole from landslides and separation of oil horizons.

Simultaneously the process of drilling is accompanied by a number of auxiliary operations performed; coring, mud logging preparation, well curvature measuring, testing or exploring the site to forecast the thickness of oil levels and etc.

  1. The full well construction project is comprised of the following submissions:
  2. Mounting platforms, drilling and platform development (typically includes infrastructure development).
  3. The process of drilling
  4. Opening and zonal isolation (implementing casing barrages and cementing; the stage that is considered to be the one that indicates the drilling process).
  5. Testing the well for the flow of oil, gas or water.
  6. Dismantling the equipment once the platform is up and running.

Actually, mentioned above are the general stages to underline, as an installation and dismantling may also include minor mending, while the process of testing may be divided into a multitude of stages.

12 Jan

Konstantin Novoselov About Graphene

Nobel Laureate in Physics Konstantin Novoselov believes that graphene, for investigation of which he and Andrew Geim received a prestigious award, will be applied in the production of high-frequency transistors. Graphene is already available for individual entrepreneurs in the UK (the price ranges from 700 to 2300 pounds).

Now everyone is talking about graphene mainly positively: the material has unique physical chemical properties; it is expected it will revolutionise the world of electronics. This is the first known to man two-dimensional material that conducts electricity as well as copper; thus it grants an opportunity to create touch screens, solar sails for space vehicles, flexible electronic devices and many more.

However, the method for producing graphene, which was pioneered by Geim and Novoselov, initially did not find support in the scientific community. They used graphite rods and duct tapes, glued and then sticking to obtain material with a thickness of just one atom. It was believed that the layers of this thickness will be deformed.

Currently, Novoselov is asked one basic question regarding a better solution for the whole world: is graphene really better than its ‘precursor’, silicon, which is already used in the manufacture of transistors? The question of how the new technology will make another step forward to really take advantage of graphene has to be answered yet.

As mentioned, graphene for private engineering purposes is already available. The world’s first supplier of this material is the company Graphene Industries, registered in Manchester, where Geim and Novoselov live and work. Moreover, the industry is entered by ambitious brain tanks – the graphene companies like 2-DTECH provide guidance on how to integrate the neoteric material, thus accelerating the commercialisation process. The company representatives claim that graphene uses are numerous, and even today the innovative businesses can derive considerable benefits from its use.

‘Right now, we are collaborating with the owner of Graphene Industries, Peter Blake, who sells graphene for studies of biological objects in the transmission electron microscopes’, says Novoselov.

Currently, work is underway on the use of graphene in the creation and super-capacious phenomenally quickly-recharged batteries, particularly for electric vehicles, laptops and mobile phones. ‘Well this is a completely new area, and the results achieved so far do not mean that the full potential is used’, says Novoselov.

Even though the author of the revolutionary invention fails to forecast when will the practical application of graphene technology be used massively and worldwide, Novoselov is still quite optimistic. ‘If I was asked a year ago, I probably would have said ‘never’, but the last year was marked by a major breakthrough in the field of mass graphene production, so at the moment I’m much more optimistic about the practical application of this material’.

According to him, a good indicator of possible applications, it was not what people think in the laboratory, but what big companies plan. ‘The plans for the application of graphene by Samsung suggested experiments with further development to the commercial samples of touchscreen-displays back in 2012, however, the progress is not yet appreciable’, Novoselov says.