Apparatus and method for detecting abnormal drilling conditions

Details Apparatus and method for detecting abnormal drilling conditions Apparatus and method for detecting abnormal drilling conditions

1978-09-25

1981-02-17

Leppink, James

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Measuring or indicating drilling fluid rate of flow

73155, 175206, E21B 2108

Patent

active

042509742

ABSTRACT:
Abnormal drilling conditions are detected by monitoring mud volume of the mud system or rate of change of the mud volume. In one embodiment, makeup mud is automatically added to the system as solids are removed from the mud. Abnormal conditions are indicated by when the rate of makeup mud addition differs from the rate of solids removal. The mud system is maintained at a substantially constant volume by means of tanks specially constructed to provide a small mud/air interface.

REFERENCES:
patent: 2290408 (1942-07-01), Crites
patent: 2340993 (1944-02-01), Smith
patent: 2886287 (1959-05-01), Croley
patent: 2941783 (1960-06-01), Stinson
patent: 2966059 (1960-12-01), Dower
patent: 3608653 (1971-09-01), Rehm
patent: 3726136 (1973-04-01), McKean et al.
patent: 3740739 (1973-06-01), Griffin et al.
patent: 3774702 (1973-11-01), Elenburg
patent: 4031751 (1977-06-01), Haddad

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