The principal factors governing the selection of type (or types) of drilling fluids (mud) to be used on a particular well are: The characteristics and properties of the formation to be drilled The quality and source of the water to be used in building the fluid The ecological and environmental considerations Continuous-Phase Classification. Drilling fluids …
Various properties of the drilling fluids are measured as an indication of the performance of the mud in the hole. Methods for measurement of these properties are stated in API RP 13B “Recommended Practice on Standard Procedure for Testing Drilling Fluids” (Check Also WBM Testing Procedure – OBM Testing Procedure). These procedures are revised and …
The Releasing Spear Fishing Tools are used in drilling to internally engage and to retrieve all sizes of tubing, drill pipe, and casing as opposed to overshots that catch on the outside. It is designed to assure positive internal engagement with the fish and is ruggedly built to withstand severe jarring (Drilling Jars) and pulling …
Oil well drilling cost per foot is a convenient way of comparing the economic impact of bit performances (Roller cone bit performance – PDC bit performance) on a well that is to be drilled. We are not interested in the absolute, actual, real, or true cost per foot on a real well. Bit prices, rig …
The bumper sub (Drilling Subs) is usually installed in the drill string just above the fishing tool (overshot) or safety joint. Its presence in the string enables the operator to release the fishing tool in the event that it is needed in the fishing operations. It will deliver the sharp downward blow that is required …
The Releasing Overshot fishing tools (check our guide to successful fishing operations) are used to externally engage and retrieve all sizes of tubing, drill pipe, and casing. Here we will discuss its components including basket grapple, spiral grapple & controls. We shall also explain in detail its operations. Overshot: First choice tool because it does …
Overview When you are designing an overshot fishing assembly, you will need to select the: overshot size connection on the top sub grapple type grapple size pack-off type grapple controtype overshot guide type overshot extension size. Selecting the Overshot Fishing Assembly Size The OD of the fish and the ID of the hole determine which …
A cut made with a set of knives installed in a tool and run on a small diameter work string. This is referred to as an internal or inside cut. Internal mechanical drill pipe cutter MPC cuts are most common when removing sections of casing and wellhead equipment during final well abandonment operations. How Mechanical …
Chemical Cutter Wireline can be defined as an electric wireline tool and procedure that uses a propellant and a chemical, halogen fluoride, to burn a series of holes in the pipe, thereby weakening it so it is easily pulled apart (pipe recovery). This method of cutting pipe is the most recent innovation. It was patented …
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 …