# HWK 8-1 - PGE 430 Drilling Homework 8 Due at lecture time...

This preview shows pages 1–2. Sign up to view the full content.

PGE 430 Drilling Homework 8 Due at lecture time: Nov. 6th Using the equations in the hydraulics module please prepare a spread sheet that performs the following calculations. (1) Determines the friction pressure loss in each section of the circulating path; inside the drill pipe, inside the drill collars, in the drill collar – hole annulus, and in the drill pipe – hole annulus. (2) Determines the optimum pump rate to maximize hydraulic horsepower at the bit. (3) Determine the nozzle sizes, in 32 nd ”, to maximize horsepower at the bit. Please make the nozzles diameters as large as possible. (4) Determines if the pump rate selected will circulate a 0.3” diameter rock chip to the surface. Data Set: mud Depth = 10,000 ft Bit Diameter = 8.75" This bit has five nozzles. Drill Pipe = 4.5" OD, 16.6 ppf, Grade E Drill Collars = 480' of 6.25" OD x 2.875" ID Maximum Pump Pressure = 3,000 psi 12 ppg ρ = a 2 f 20 cp 10 sec gel = 12 lb / 100 ft Cutting Density = 2.65 g/cc μ = (5) What is the largest particle diameter that can be suspended by the mud if circulation is stopped?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document