Drilling oil and gas wells can sometimes encounter a common issue called the drill pipe twist off. This problem can have a direct impact on the overall well cost and duration of the drilling process. In this article, we will explore the primary causes of this problem and discuss ways to prevent it. What Is …
During drilling and workover operations, the consequences of leaks with sour gas or crude may be devastating. Drilling H2S-bearing formations poses one of the most challenging and dangerous problems to humans and equipment. Personnel can be injured or even killed by relatively low concentrations of H2S in a very short period. Equipment can experience terrible …
In general, differential sticking is a situation that may happen during any stage of drilling the well and cause the drill string or casing pipe to be stuck (no upward or downward movement). It actually happens when the hydrostatic pressure, ph (which acts on the outside wall of the Pipe), is more than the pore …
Drill string vibrations can have a significant impact on the performance of oil and gas drilling operations. They can lead to premature wear and tear of drilling equipment, resulting in fatigue and induced failures such as drill pipe washout. Additionally, they decrease the drilling energy delivered to the bit. Therefore, it will cause a drop …
Oil & gas blind drilling is the process of drilling at the minimum possible pump rate to conserve drilling fluid stocks while the annulus is topped up with water. If returns begin while drilling, this might indicate that the circulation loss zone has been plugged with drilled cuttings. However, it could also indicate the onset …
Pipe Washout in oil and gas is a sudden problem that may happen during any stage of drilling the well and may cause a parting of the string and the following fishing in drilling operations that will increase well time and cost. Drill Pipe Washouts Causes & Precautions As with all downhole problems, prevention is …
When encountering losses, the priority is to determine the type of mud losses which will help you choose the suitable size and material for bridging or plugging material for the loss zone. Below is how to differentiate between them: Losses into the formation structure are usually indicated by an increasing loss rate as drilling exposes …
Electric wireline service companies run instruments on conductor lines inside the stuck drill pipe or tubing and are able to accurately determine the stuck point (check also stuck point calculations) of the pipe. The instruments called free point indicator tools are highly sensitive electronic devices that measure both stretch and torque movement in a drill …
When a pipe becomes stuck in the wellbore for any reason, one of the first steps is to calculate to determine at what depth or point the pipe stuck has occurred. This process is called stuck pipe free point calculation. When retrieving production tubing from a well, it is often expected to find that the …
Dogleg severity is a measure of the amount of change in the inclination, and/or azimuth of a borehole usually expressed in degrees per 100 feet of course length. In the metric system, it is usually expressed in degrees per 30 meters or degrees per 10 meters of course length. All directional drilling wells have changes …
