Boring or penetrating the earth – Automatic control
Reexamination Certificate
2000-02-23
2001-08-21
Tsay, Frank (Department: 3672)
Boring or penetrating the earth
Automatic control
C175S045000, C166S066000, C706S047000
Reexamination Certificate
active
06276465
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates in general to computer implemented processes for improving drilling operations, and in particular to a system and method for facilitating the selection and use of drill bits in order to minimize the occurrence of undesirable bit conditions such as undesirable bit balling.
2. Description of the Prior Art
Bit balling is an undesirable operating condition which impedes drilling operations. In general, drilling operations are performed in a manner which minimizes the possibility of the occurrence of bit balling. One factor which can be controlled is the selection of particular drill bits from a group of available drill bits. Certain bits may be less prone to bit balling under certain drilling conditions, while other bits are more prone to bit balling under certain drilling conditions.
SUMMARY OF THE INVENTION
It is one objective of the present invention to provide a new system, method, and apparatus for providing an indicator of potential bit performance in a particular wellbore, which utilizes an inference engine computer program which consists of executable instructions, and which is adapted to utilize a plurality of wellbore parameters as inputs, including forensic wellbore data from an offset or comparable wellbore, and which includes at least one rule matrix which defines a plurality of fuzzy sets which establish correspondence between the plurality of wellbore parameters and the indicator of potential bit performance.
It is another objective of the present invention to provide such an indicator of potential bit performance which provides an indication of the potential for undesirable bit balling.
It is another objective of the present invention to provide an indicator which may be utilized in selecting particular drill bits for use in a particular wellbore.
The foregoing and additional objectives are achieved as follows. A method is provided for generating an indicator of potential bit performance in a particular wellbore. Forensic wellbore data is obtained from at least one previously drilled wellbore which is determined to be comparable to the particular target wellbore. Typically, the comparable wellbore comprises an “offset” wellbore which is proximate to the target wellbore, and which has similar geologic features. An inference engine computer program is provided which consists of executable program instructions. It is adapted to utilize a plurality of wellbore parameters, but at a minimum it utilizes the forensic wellbore data. The inference engine includes at least one rule matrix which defines a plurality of fuzzy sets. These fuzzy sets establish correspondence between wellbore parameters and the indictor of potential bit performance. The inference engine computer program is loaded onto a data processing system. At least the forensic wellbore data is supplied as an input to the inference engine computer program. The data processing system is utilized to execute the program instructions of the inference engine computer program. This causes the application of the inputs to the inference engine computer program. The inference engine computer program produces as an output an indication of potential bit performance in the particular target wellbore.
The above as well as additional objectives, features, and advantages will become apparent in the following description.
REFERENCES:
patent: 4507735 (1985-03-01), Moorhead
patent: 4852399 (1989-08-01), Falconer
patent: 4914591 (1990-04-01), Warren et al.
patent: 4926686 (1990-05-01), Fay
patent: 4928521 (1990-05-01), Jardine
patent: 5181172 (1993-01-01), Whitten
patent: 5216917 (1993-06-01), Detournay
patent: 5305836 (1994-04-01), Holbrook et al.
patent: 5318136 (1994-06-01), Rowsell et al.
patent: 5390748 (1995-02-01), Goldman
patent: 5415030 (1995-05-01), Jogi
patent: 5416697 (1995-05-01), Goodman
patent: 5417295 (1995-05-01), Rao et al.
patent: 5637795 (1997-06-01), Hale et al.
patent: 5660239 (1997-08-01), Mueller
patent: 5730234 (1998-03-01), Putot
patent: 5787022 (1998-07-01), Tibbitts et al.
patent: 5794720 (1998-08-01), Smith et al.
patent: 5842149 (1998-11-01), Harrell
patent: 6112809 (2000-09-01), Angle
Cooley Craig Hodges
Curry David Alexander
Ledgerwood, III Leroy William
Baker Hughes Incorporated
Hunn Melvin A.
Tsay Frank
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