Buckled drillstring easily existed in extended-reach drilling (ERD) engineering, causing casing wear more severe. However, the effect of the buckled drillstring on casing wear prediction is going unheeded in long-term studies. To solve the issue, this paper proposes a new model, named as circumferential casing wear depth (CCWD) model, based on the energy principle and the more complicated geometry relationship than that in casing wear groove depth (CWGD) model. Meanwhile, sensitivity analysis of parameters clearly describes the changing trends among them. With the established composite wear models, the change of casing wear depth versus drilling footage under different composite wear cases is also discussed. The results show that the severe casing wear may occur if there is the buckled drillstring; due to the greater contact force and more sophisticated wear shape than those under nonbuckling condition, a shorter drilling footage could make a larger calculation error when only CWGD model is used. In the case study, the method of the inversion of casing wear factor from the drilled well can be used to predict the well whose structure resembles it; the revised coefficient, the maximum risky casing wear depth can be evaluated for each wellbore section to avoid drilling engineering failure. The new model provides a practical method to improve the prediction accuracy of casing wear in ERD. Neglecting the effect of the buckled drillstring will make the prediction underestimated and a great economic loss, which is significant for ERD.

References

References
1.
Russel
,
W.
,
Lewis
,
T. R.
, and
Wright
, Jr
.,
1974
, “
Casing Wear: Some Causes, Effects and Control Measures
,”
World Oil
, (
4
), pp.
99
103
.
2.
Bradley
,
W. B.
, and
Fontenot
,
J. E.
,
1975
, “
The Prediction and Control of Casing Wear
,”
J. Pet. Technol.
,
27
(
2
), pp.
233
245
.
3.
Williamson
,
J. S.
,
1981
, “
Casing Wear: The Effect of Contact Pressure
,”
J. Pet. Technol.
,
33
(
12
), pp.
2382
2388
.
4.
Best
,
B.
,
1986
, “
Casing Wear Caused by Tooljoint Hardfacing
,”
SPE Drill. Eng.
,
1
(
1
), pp.
62
70
.
5.
Schoenmakers
,
J. M.
,
1987
, “
Casing Wear During Drilling-Simulation, Prediction, and Control
,”
SPE Drill. Eng.
,
2
(
4
), pp.
375
381
.
6.
White
,
J. P.
, and
Dawson
,
R.
,
1987
, “
Casing Wear: Laboratory Measurements and Field Predictions
,”
SPE Drill. Eng.
,
2
(
1
), pp.
56
62
.
7.
Gao
,
D. L.
, and
Sun
,
L. Z.
,
2012
, “
New Method for Predicting Casing Wear in Horizontal Drilling
,”
Pet. Sci. Technol.
,
30
(
9
), pp.
883
892
.
8.
Sun
,
L. Z.
,
Gao
,
D. L.
, and
Zhu
,
K. L.
,
2012
, “
Models & Tests of Casing Wear in Drilling for Oil & Gas
,”
J. Nat. Gas Sci. Eng.
,
4
, pp.
44
47
.
9.
Lubinski
,
A.
,
1950
, “
A Study of the Buckling of Rotary Drilling Strings
,”
API Drilling and Production Practice
, New York, Jan. 1, Paper No. API-50-178https://www.onepetro.org/conference-paper/API-50-178.
10.
Lubinski
,
A.
, and
Althouse
,
W. S.
,
1962
, “
Helical Buckling of Tubing Sealed in Packers
,”
J. Pet. Technol.
,
14
(
6
), pp.
655
670
.
11.
Paslay
,
P. R.
, and
Bogy
,
D. B.
,
1964
, “
The Stability of a Circular Rod Laterally Constrained to Be in Contact With an Inclined Circular Cylinder
,”
ASME J. Appl. Mech.
,
31
(
4
), pp.
605
610
.
12.
Dawson
,
R.
, and
Paslay
,
P. R.
,
1982
, “
Drill Pipe Buckling in Inclined Holes
,”
J. Pet. Technol.
,
36
(
10
), pp.
1734
1738
.
13.
Miska
,
S.
,
Qiu
,
W.
,
Volk
,
L.
, and
Cunha
,
J. C.
,
1996
, “
An Improved Analysis of Axial Force Along Coiled Tubing in Inclined/Horizontal Wellbores
,”
SPE International Conference on Horizontal Well Technology, Calgary, AB, Canada
, Nov. 18–20,
SPE
Paper No. SPE-37056-MS.
14.
Mitchell
,
R. F.
,
1997
, “
Effects of Well Deviation on Helical Buckling
,”
SPE Drill. Completion
,
12
(
1
), pp.
63
70
.
15.
Chen
,
Y. C.
,
Lin
,
Y. H.
, and
Cheatham
,
J. B.
,
1990
, “
Tubing and Casing Buckling in Horizontal Wells
,”
J. Pet. Technol.
,
42
(
2
), pp.
140
191
.
16.
Gao
,
D. L.
,
Liu
,
F. W.
, and
Xu
,
B. Y.
,
1998
, “
An Analysis of Helical Buckling of Long Tubulars in Horizontal Wells
,”
JGSS Res.
,
6
(
1
), pp.
131
146
.
17.
Gao
,
D. L.
,
2006
,
Down-Hole Tubular Mechanics and Its Applications
,
China University of Petroleum Press
,
Dongying, China
.
18.
Gao
,
D. L.
, and
Huang
,
W. J.
,
2015
, “
A Review of Down-Hole Tubular String Buckling in Well
,”
Pet. Sci.
,
12
(
3
), pp.
443
457
.
19.
Huang
,
W. J.
,
Gao
,
D. L.
, and
Liu
,
F. W.
,
2015
, “
Buckling Analysis of Tubular Strings in Horizontal Wells
,”
SPE J.
,
20
(
2
), pp.
405
416
.
20.
Yu
,
Y. N.
,
Han
,
Z. Y.
, and
Lu
,
Y. M.
,
1997
, “
Lateral Buckling of Drill String in Inclined Hole
,”
J. Univ. Pet. China
,
21
(
3
), pp.
65
67
.
21.
Mitchell
,
S.
, and
Xiang
,
Y.
,
2012
, “
Improving Casing Wear Prediction and Mitigation Using a Statistically Based Model
,”
IADC/SPE Drilling Conference and Exhibition
, San Diego, CA, Mar. 6–8,
SPE
Paper No. SPE-151448-MS.
22.
Tan
,
C. J.
,
Gao
,
D. L.
,
Tang
,
H. X.
, and
Wei
,
C. J.
,
2006
, “
Method of Casing Wear Prediction for Liuhua Mega-Extended-Reach Wells in South China Sea
,”
Oil Drill. Prod. Technol.
,
28
(
1
), pp.
13
14
.
23.
Hall
,
R. W.
, and
Malloy
,
K. P.
,
2005
, “
Contact Pressure Threshold: An Important New Aspect of Casing Wear
,”
SPE Production Operations Symposium
, Oklahoma City, OK, Apr. 16–19,
SPE
Paper No. SPE-94300-MS.
24.
Huq
,
M. Z.
, and
Celis
,
J. P.
,
2002
, “
Expressing Wear Rate in Sliding Contacts Based on Dissipated Energy
,”
Wear
,
252
(
5–6
), pp.
375
383
.
25.
Yu
,
L.
,
Zhang
,
L. B.
,
Fan
,
J. C.
, and
Shi
,
D.
,
2004
, “
The Research on Calculation Method of Casing Wear Caused by Drill-Pipe Revolution
,”
Drill. Prod. Technol.
,
27
(
4
), pp.
66
69
.
26.
Gao
,
D. L.
,
Sun
,
L. Z.
, and
Lian
,
J. H.
,
2010
, “
Prediction of Casing Wear in Extended-Reach Drilling
,”
Pet. Sci.
,
7
(
4
), pp.
494
501
.
27.
Gao
,
C.
,
Miska
,
S.
,
Yu
,
M. J.
,
Ozbayagolu
,
E.
, and
Takach
,
N.
,
2016
, “
Triaxial Tests for Shales After Pore Plugging With Nanomaterials: An Example of Rock Characterization on Cuttings-Size Samples
,”
50th U.S. Rock Mechanics/Geomechanics Symposium
,
Houston, TX
, June 26–29, Paper No.
ARMA-2016-102
.https://www.onepetro.org/conference-paper/ARMA-2016-102
28.
Chen
,
P. J.
,
Gao
,
D. L.
,
Wang
,
Z. H.
, and
Huang
,
W. J.
,
2015
, “
Study on Multi-Segment Friction Factors Inversion in Extended-Reach Well Based on an Enhanced PSO Model
,”
J. Nat. Gas Sci. Eng.
,
27
(Pt. 3), pp.
1780
1787
.
You do not currently have access to this content.