Casing Tallies Versus Liner Tallies There are two different types of tubular tallies: 1) a casing tally spreadsheet and 2) a casing liner tally. A casing tally works from a fixed point at the wellhead (e.g. hanger landing point) and the formulae in the spreadsheet calculate the shoe depth by adding the length of each …
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 the mud is in a static condition, the rheological properties should prevent solids (weighting material and drilled formation solids) from settling. The relevant property in this respect is the mud’s gel strength. The drilling mud gel strength is caused by the interactive forces between colloids (e.g., clay particles), polymer radicals, or emulsion droplets in …
It will be recalled that the upward velocity of the mud in the annulus between the drill pipe and the wall of the hole is an important consideration with the function of drilling fluid of removing drilling cuttings. The usual expression of this annular velocity is in feet per minute. Annular Velocity Calculations & Formula …
Kill sheets are used to calculate the mud weight, mud quantities, and pumping times required to bring a well back to primary control after a gas kick. A description of how to complete kill sheets will be discussed in this article. The kill sheet is a printed form that contains blank spaces for recording information …
Foamed cement is a coarse dispersion of a base cement slurry, a gas (usually nitrogen), a foaming surfactant, and other materials to provide foam stability. Foamed cement is generally less expensive than systems containing glass microspheres or cenospheres (Edmondson and Benge, 1983); however, special equipment is required at the well site to inject nitrogen or …
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 …
Drilling Formulas Calculations are not difficult to perform, and after downloading this free spreadsheet, you will find how easy they are. In this spreadsheet you will find that it is divided into many sections: Applied Drilling Formulas Calculations Spreadsheet This section includes the following formulas: Basic Drilling Formulas In this Basic Drilling Formulas calculations, you …
ECD / Equivalent Circulating Density is an important parameter to monitor in the drilling process of a well, especially in horizontal & HPHT wells. In this article, our objective is as follows: ECD Definition, the calculations & formula of theoretical ECD in Drilling & to explain the parameters that influence ECD. You can also download …
Mud Engineers & drilling engineers need to have quick drilling fluid calculations equations to help them while they are on the rig. In this article, we will have a simple guide for the most used equations for drilling mud preparations, system, displacement, volumes, etc. Density and Specific Gravity Calculations For mud The density of a …
