Method for predicting drillstring sticking

Details Method for predicting drillstring sticking Method for predicting drillstring sticking

1989-11-14

1993-01-19

Envall, Jr., Roy N.

Boots, shoes, and leggings

73151, G06F 1520, E21B 4400

Patent

active

051811723

ABSTRACT:
A method for predicting drillstring sticking while drilling a borehole includes evaluating the borehole severity for the drillstring at two or more measured bit depths, evaluating the rate of change of borehole severity with bit depth, and predicting the onset of drillstring sticking based on the magnitude of the rate of change of borehole severity with bit depth.

REFERENCES:
patent: 4382381 (1983-05-01), Soeiinah
patent: 4384483 (1983-05-01), Dellinger et al.
patent: 4695957 (1987-09-01), Peltier
patent: 4739841 (1988-04-01), Das
patent: 4760735 (1988-08-01), Sheppard et al.
patent: 4791998 (1988-12-01), Hempkins et al.
Hollander et al., "The Drilling Advisor", IEEE 1983 Proceeding of Trends and Applications.
C. A. Johancsik, D. B. Friesen, R. Dawson, "Torque and Drag in Directional Wells-Prediction and Measurement", Journal of Petroleum Technology, Jun. 1984--directed to a computer model for predicting torque and drag on a drillstring.
R. Whitten, "Application of Side-Force Analysis and MWD to Reduce Drilling Costs", SPE/IADC 1987 Drilling Conference, Mar. 1987.

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