Chuong 9 directional drilling

Petroleum Engineering 405 Drilling Engineering * Well Drilling Engineering Directional Drilling Dr DO QUANG KHANH * Directional Drilling When is it used? Type I Wells Type II Wells Type III Wells Dire[.]

Well Drilling Engineering Directional Drilling Dr DO QUANG KHANH Directional Drilling I II  When is it used? KOP  Type I Wells EOC  Type II Wells  Type III Wells Build and Hold Build-Hold and Drop III Continuous Build  Directional Well Planning & Design  Survey Calculation Methods Read ADE Ch.8 (Reference) Inclination Angle , I Direction Angle , A Max Horiz Depart ? 10 11 Type I Type II Type III Build-Hold and Drop Continuous Build KOP EOC Build and Hold 12 In the BUILD Section r x = r (1 - cos I) y = r sin I I y L r I x L = r rad    L =   r Ideg  180  18,000 r  * BUR 13 14 Fig 8.11 r1  x and r1  r2  x 15 r1  x and r1  r2  x 16 N18E S23E Azimuth Angle S20W N55W 17 18 Example 1: Design of Directional Well Design a directional well with the following restrictions: • Total horizontal departure = 4,500 ft • True vertical depth (TVD) = 12,500 ft • Depth to kickoff point (KOP) = 2,500 ft • Rate of build of hole angle = 1.5 deg/100 ft • Type I well (build and hold) 19 Example 1: Design of Directional Well (i) What is the maximum hole angle required (ii) What is the total measured depth (MD)? (MD = well depth measured along the wellbore, not the vertical depth) 20