... Abstract This paper presents a state-of-the-art bending fatigue model for wire ropes and applies it to optimize slip and cut intervals of drawworks drilling lines. The new model considers many parameters and variables, such as specific line tension, sheave-to-line diameter ratio, optional...

... pipe rotation simulation onepetro exhibition journal diameter eqn wellbore swarm drilling conference Introduction Total loss of drilling mud into the formation is a common occurrence when drilling through severely fractured and vugular carbonate formations, allowing an influx...

... (NDT) inspection and measurement package combining wall thickness and outer diameter (OD) measurement data into a single inspection report per tubular. This method of dimensional measurement is performed on the front end of a project, providing end users with numerous benefits from a cost and time...

... encountered. A prospect in the US Gulf of Mexico required drilling to measured depths exceeding 31000 feet in water deepwater. Under such demanding depth, a non-typical drillstring was required to manage the tensile loading. Typical drill pipe connections on 6 5/8" S-135 tool joints are 8.5" diameter...

... section using managed-pressure equipment to overcome high reservoir bottomhole pressure. The project involved several challenges: large-diameter production casing with a requirement to maintain high shut-in wellhead pressure, complex wellbore geometry, operations from a workover rig with zero discharge...

... to expand its service portfolio in a way that is beneficial to the environment and the safety of current and future generations. high-level waste inventory canister radioactive waste borehole repository diameter waste management information spent fuel mined repository upstream oil & gas...

.... The restrictions regarding collapse performance under compression are discussed. loading equivalent grade accounting diameter extrado fiber calculate pipe collapse performance equation upstream oil & gas equivalent grade torsion equivalent stress internal pressure axial stress outer wall...

... with a change of diameter. Therefore, one shall be cautious when calculating the local buoyancy force either on a plain or a perforated tube. The paper describes how to calculate the local buoyancy force on a portion of a drill-stem by application of the Gauss theorem accounting for the necessary corrections...

... hole. Student teams have developed new rig configurations to enable several unique steering methods that include a rotary steering system and small-scale downhole motors with a bent sub. The most significant challenge was creating a functional downhole motor to fit within a 1.25-inch (3.18 cm) diameter...

... accurate model for the single sheave efficiency. The new model, which is based on strong empirical evidence, shows that the single sheave efficiency is not a constant but depends strongly on the line tension and on the line to sheave diameter ratio. The paper also shows how the improved single sheave...

... for new wells as well as recommended monitoring and action plans. Reservoir Characterization salt creep boundary condition reduction hydrostatic pressure casing and cementing collapse resistance strength pipe ovality casing design salt loading diameter loading Upstream Oil & Gas...

... contractors operator conclusion single size string Reach Drilling diameter requirement tapered string Abstract To date, extended reach drilling (ERD) wells drilled on one of the main UAE offshore reservoirs have been delivered by using a tapered drill string design that combines two sizes...

... tortuosity when combined with the data-driven approach from measurement while drilling (MWD)/gyroscope data, and an objective approach of smoothing using a new tortuosity calculation method. trajectory design calculation pipe Upstream Oil & Gas quantify diameter torsion well planning...

... tools were needed to facilitate running of the contingent liner. Under-reaming operations are associated with a degree of uncertainty on the final hole diameter. A technology was deployed to monitor cutter position, wear and vibrations. With the aim of removing the above uncertainty. An open-hole...

... and cementing finite element engine diameter slim well design post-buckled configuration international association of drilling contractors dl value deformation reservoir high dl value casing design acceptable limit conductor pipe centralizer configuration Scenario Introduction...

... ignition diffusion flame droplet diameter particle flame length burn efficiency tool diameter conclusion blowout oil droplet expansion breakup production logging modeling combustion evaluation History of the Study of Wellhead Ignition in Alaska During the 1980s and early 1990s...

... selection lateral drilling operation nd generation dsc Upstream Oil & Gas drill pipe new connection generation dsc Directional Drilling Makeup Torque inspection diameter tolerance ruggedness field trial tool joint Fatigue testing drilling equipment rig performance cost paradigm...

... and diameter of stabilizers within a bottom hole assembly (BHA), or the design of the stabilizer element itself. This paper is focused on the stabilizer element, not its placement in the string. Stabilizer design has been the subject of study as early as 1954, with at least two papers by Lubinski (Woods 1954...

... completion landing strings and intervention pipe. Tubulars for these operations must provide a large internal drift diameter to allow for clearance of the wellhead crown plug and installation of completion components. These strings have been limited to 6-5/8 in. pipe allowing for a maximum drift diameter...

.../2 REG, 40 times longer than the NC38, and 10 times longer than a 3 1/2 REG with 1-in. SRG. The following thread form characteristics account for the exponential increase in life of the NC connections over the 3 1/2 REG: larger pitch diameter, SRG, larger root radius, and reduced taper angle...