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Drilling services

drilling fluid

Drilling Mud was invented to help remove the unconsolidated mixture of sand and clays debris generated by the drilling process. This mixture is very unstable, causing it to collapse on top of the drill bit and increase the difficulty of drilling operations. To resolve this issue, circulation of freshwater was introduced to aid in the removal of the debris. Freshwater mixed with the sand and clay formed a viscous solution that would be later coined as “mud” or drilling mud. The mud not only removed debris from the wellbore. It also formed a filmed layer on the sides of the wellbore that added to the stability of the hole.

drilling bits

Drilling Bits

The drill bit is an important component in the drill string. The bit drills the rock in many mechanisms. The drilling bit is selected according to the formation to be drilled. The bit performance is related to several operating parameters like: weight on bit, revolution per minute, mud properties and hydraulic efficiency. When the bit is pulled out of the hole, the level of damage on the bit must be carefully recorded. The system followed to evaluate the bit is called the IADC dull grading system which is designed to facilitate the damage grading. An accurate grading can contribute effectively in bit selection in future operations.

measuring while drilling

Measurement While Drilling (MWD) is the downhole measurement of important parameters and (in most cases) the simultaneous transmission of those measurements to the surface while drilling by an electromechanical device located in the bottomhole assembly (BHA). MWD was developed as a solution to the challenges faced when well drilling at extreme angles. At angles of 60o or more from the center, it is difficult to determine what comes next from the images, and drilling by ‘feel’ is a dangerous risk. For MWD, measurement tools are fitted in the drill bores and drill string. This allows for highly optimized drill steering as real-time data from the drill bore becomes available to the operator.

directional drilling

Directional Drilling has been an integral part of the oil and gas industry since the 1920s. While the technology has improved over the years, the concept of directional drilling remains the same: drilling wells at multiple angles, not just vertically, to better reach and produce oil and gas reserves. Additionally, directional drilling allows for multiple wells from the same vertical well bore, minimizing the wells’ environmental impact. Improvements in drilling sensors and global positioning technology have helped to make vast improvements in directional drilling technology.                       

mud logging

A mud logging unit is installed on the rig when geologic information must be retrieved on a timely basis. Mud logging is the term applied to the process of analyzing the drilling mud and cuttings for oil and gas and correlating these shows with the depth of the formations from which they came. The amounts of oil and gas found in the mud and cuttings from productive formations vary widely due to variations in drilling practice and in formation characteristics. Hence, mud logging does not furnish quantitative information useful to engineers in calculating reserves for productivity of formations. Its principal usefulness is as an aid to formation evaluation in exploratory wells by detecting and locating oil and gas occurrences as the well is drilled.        

wireline logging

Oil and gas reservoirs lie deep beneath the Earth’s surface. Geologists and engineers cannot examine the rock formations in situ, so tools called sondes go there for them. Specialists lower these tools into a wellbore and obtain measurements of subsurface properties. The data are displayed as a series of measurements covering a depth range in a display called a well log. Often, several tools are run simultaneously as a logging string, and the combination of results is more informative than each individual measurement.