Drilling and Testing for Oil

Once the oil rig system is set up and in place, the crew starts the drilling operation. Above where the geologists have predicted the oil trap is located, a starter hole is drilled to the surface hole and down to a pre-set depth. Technical Data used in the field explained in drilling courses in Islamabad. There are five basic steps to drilling the surface hole. First the drill bit is placed in the collar and drill pipe in the hole. The kelly is attached to the turntable and drilling begins. As drilling progresses, mud is circulated through the pipe and out of the bit to float the rock cuttings out of the hole. New sections (joints) are added to the drill pipes as the hole gets deeper. Lastly, the drill pipe, collar and bit are removed (tripped out) when the pre-set depth is reached which is generally between a few hundred and a couple-thousand feet.

When the pre-set depth is reached, the crew must run and cement the casing which involves placing the casing-pipe sections into the hole to prevent it from collapsing in on itself. To keep it centered in the hole, casing pipe has spacers around the outside. The casing crew puts the casing pipe in the hole. Using a bottom plug, a cement slurry, a top plug and drill mud, the cement crew pumps cement down the casing pipe. The pressure from the drill mud causes the cement slurry to move through the casing and fill the space between the outside of the casing and the hole. Finally, the cement is allowed to harden and then tested for hardness, alignment and a proper seal. This describes the method of drilling that has been used for years. The oil industry and the U.S. Department of Energy are working to drill oil with new drilling technologies, including horizontal drilling techniques, to reach oil under ecologically-sensitive areas, and using lasers to drill. Some more details of drilling courses in Islamabad are as under.

After the crew drill, then run and cement new casings, they then drill again to ensure they have reached the appropriate depth. The final depth is reached when the rock cuttings from the mud reveal the oil sand from the reservoir rock. At this point, the drilling apparatus is removed from the hole. Then further tests are performed to confirm that they have drilled in the correct spot to reach the oil. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join drilling courses in Rawalpindi.