Drilling Engineering 2u116s

Drilling Engineering By J.J.Azar, G.Robello Samuel Errata The following are the known errors/typos. Chapter 1 1. Page 7 line 3 – redundant words “may be” to be deleted P 2. Page Eq.1.1b - subscript i in Pi missing. η = 100 0 Pi outputpowe r ×100 inputpower

3.

Page 9:

4.

Page 9: 3rd line: Pi =

5.

Page 18 . Eq. 1.12, Change Vt =

48.5 NT NT or Q f = 48.5 2545 η ηH  2D 2L − D 2r π Ls Nc   4 4 

  to Vt = π L s N c 2D 2L − D 2r  4 

(

6.

Page 13 . Eq 1.10. (H L + S)( N + 2) (H L + S)(n + 2) to R c Change R c N n In the above equation change “N” to n to prevent conflict with RPM where n = number of lines strung to the traveling block 7. Page 13-Example 1.3 16lbs to be 16lb/ft and 0.65 efficiency 8. Page 18 . Eq. 1.12  2D 2L − D 2r  π  to Vt = π L s N c 2D 2L − D 2r Change Vt = L s N c    4 4 4   In the above equation second numerator of 4 is redundant. 9. Page 19. Under example problem 1.5 Line Multiplication factor 0.9 used is the efficiency – in this problem it is assumed. 10. Page 19 Last Line: Qt = πDL2LsNc/4 = πx62x20x3/4 = 1697in3/stroke Or, Qt = (1697x7.48gal/ft3)/(12in)3 x 60= 440 gpm

(

)

11. Page 25, Line 1: Words “The are” should be corrected as “There are” 12. Page 29 Line 9 = 25,000 lbs instead of 100,000 lbs 13. Page 35 add the following along with the last line if the stroke length is 20 inches.

Chapter 2 1. Page 56, Eq. 2.18 Change to Q m = Q f + hA 2. Page 53. Eq. 2.9 Change f w fi to f w γ i 3. Page 53 Eq.2.11 and Eq.2.12 have to be corrected as 42 f w γ f − γ o 42(1 − f w ) γ f − γ o wi = wj = γ   γo  γ   γ o    1 − f w  o  − (1 − f w ) o    1 − f − ( 1 − f ) w w   γ  γ j    γi   i    γ j 

(

4.

)

Page 54 Eq. 2.13 RHS numerator γ

(

f

to γ L

)

)

5.

Page 56 Eq.2.18 Qm = Qs + hA

6.

Page 58. Eq. 2.21 Change to f vm =

f vc hA Q f + hA 1

8.

  f vc 2  − 1∆Pt   2k  f vm   Page 58, Eq. 2.28, Change to Q f = A   + Qs µ     Page 70, Eq. 2.35b τ y = 2θ 300 − θ 600

9.

Page 81 last but one line change 44 to 4.4

7.

Chapter 3 1. Example 3.1 on Page 87. Following additional data can be added. Maximum 56 kips of Weight on bit is allowed. If not the Ldc can be assumed to be 1500 ft. Under Example 3.1on Page 88.The following can be added between line 5 and 6 Length of the Drillcollar can be calculated as below: Design Factor × WOB 1× 56 L fDC = = ≈ 1500ft w dc × BF × cos θ 100.8 × 0.746 × cos 60 2. Page 89. Line 12 τg Tg Change ∆Pfrac = to ∆Pfrac = 300 D h − D op 300 D h − D op

(

3. 4.

)

(

)

Page 88, line 6, change γ m = 20 sp.gr to γ m = 2 Page 103. Line 21 π 2 π 2 Change = πν a min D h − D odp to = ν a min D 2h − D 2odp 4 4

(

)

(

5. Page 104 line 3 v adp instead of a adp ∆Pfadp =

) µ v adp

 2  Dh2 − Dopd 2 2  1500 Dh + Dodp − D  ln h  Dodp 

     

6. Page 104 line 4 8.875 instead of 8.55 and 100 instead of 110 in the numerator

=

(40)(100 / 60 )

  2 2  2 2 8.875 − 5  1500 8.875 + 5 −  8.875   ln 5   7. Page 132 line 17 θ 600 = 55 θ 300 = 35 Chapter 4 1. 2. 3.

Page 146, line 5 form bottom: nozzles instead of naozzles Page 149. Fig. 4.1 The deviation angle 30 deg is with respect to horizontal. Page 149 in the figure 4.1 30 deg should at the bottom against the dotted line instead of the existing one.

4.

Page 151 line 5 from bottom the equation is missing a variable and should be as below:

Aopt =

8.311 × 10 −5 γ (Qopt ) 2 C d2 (∆PBopt )

Chapter 5 1. Page 180. Eq. 5.18  ρ − ρm Change v s = 86.4  s  ρm

 d s to v s = 86.4d s 

2. Page 180 Eq. 5.17 denominator

 v s = 0.458β  

 36800d s  2  β

β2

instead of

 ρ s − ρ m   ρ m

 ρs − ρ m   ρm

  

β2

   + 1 − 1 ( forβ < 10)  

3. Page 180 Eq.5.18 d s should be outside the square root

 ρ − ρm v s = 86.4  s  ρm

  d s 

( forβ <10 )

4. Page 181. Eq. 5.21 Change denominator ( γ m µ a ) to ( γ mµ a )0.333 5. Page 182. Eq. 5.23  γ − γm   γ − γm  h s to v s = 131.4 h s  s Change v s = 131.4  s γ m  γm   6. Page 185 Eq.5.27,5.28 and 5.29

  

Change v ca , v cr , v cs to Vca , Vcr , Vcs respectively 7. Page 186 Eq.5.34 Change γ 2 to γ m 8. Page 186 last row add Qopr = 100 gpm 9. Page 187 Line 13 equation (5.31) 10. Page 187 After line 8 the following lines were missing from the original manuscript Solution:

Vca = Vcr + Vcs

Vcr =

Vcr =

1   Dop 1 −    Dh

  

2

18.16     0 . 64 +  ROP    1

  Dop   18.16    0.64 + 1 −   ROP     Dh    Vcs = Vcs C ang C size C mwt 2

C ang = 0.0342θ − 0.000233θ 2 − 0.213

C size = −1.04 D50 + 1.286 C ang = 1 − 0.0333(γ m − 8.7 )

1. Page 190: instead of ibid for Reference 17 add the following: Larsen, T.F “ A study of the critical fluid velocity in cuttings transport for inclined wellbore” Thesis, University of Tulsa, 1990 Chapter 6 1. Page 210 Eq.6.9 and 6.10 are made more clear as below: For Vk < Vadc

γ k = γ mo − (Psic − Psidp ) / k (Vk / C adc )

(6.9)

and for Vk > Vadc

γ k = γ mo − (Psic − Psidp ) / k{L dc + (Vk − Vadc ) / C adp }

(6.10)

Chapter 7 1. Page 265 Eq.7.37 change to β = arc cos (cos θo cos θo + sin θo sin θo cos ∆α) Last Page: Profile Change as below:

Dr. Robello Samuel has been a principal technical advisor (Drilling Engineering) in the Drilling, Evaluation division of Halliburton since 1998. He has over twenty five years of experience in domestic and international oil/gas drilling and completion operations, management, consulting, research and teaching. His skills include well planning, design, cost estimates, supervision of drilling and completion operations, personnel and technical review, project management, and creative establishment of project relationships through partnering and innovation. At present, he is a technical and engineering lead for well planning application suite for drilling, completions, and well-services operations. He has been an educator in USA, Venezuela, Mexico, China and India. Also, he is an adjunct professor for the past seven years in the Petroleum program of Chemical and Mechanical Engineering Technology Departments at the University of Houston; teaching advanceddrilling engineering, downhole tools and technologies and complex well architecture courses. Dr. Samuel has written or co-written more than seventy journal articles, conference papers and technical articles. He has given several graduate seminars at various Universities. Dr. Samuel has been the recipient of numerous awards including the “CEO for A Day (Halliburton)” award. He has also worked at Oil and Natural Gas Corporation (ONGC), India from 1983 to 1992 as a drilling engineer. Dr. Samuel holds B.S. and M.S. (mechanical engineering) degrees from University of Madurai (Madurai) and College of Engineering, Guindy, Anna University (Chennai), M.S. and Ph.D. (petroleum engineering) degrees from Tulsa University. He is also the author of “Advanced Drilling Engineering” “Downhole Drilling Tools-Theory and Practice for Students and Engineers” (Gulf Publishing Company) and forthcoming book “Applied Drilling Engineering Optimization”. Dr. Samuel can be reached via email at [email protected] or on the web at www.sigmaquadrant.com or www.oilwelltechnology.com.