PATENT CLAIM ANALYSIS

Application Number: 15903272
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["700", "275000"]

Abstract:
A system and method for optimized control of an assembly for drilling a borehole comprises a self-tuning, multivariable controller and an optimization engine that manipulates the setpoints of the controller such that drilling performance may be continuously optimized. The method includes evaluation of a characteristic system time constant, using this constant to compute bit ROP, using computed ROP to compute process gains, which are used to tune the multivariable controller, automatically refining controller setpoints based on controller performance, and using an optimization engine to systematically adjust controller setpoints such that drilling parameters are optimized based on any of several performance indicators, or a weighted combination of performance indicators. The method further comprises using at least one performance indicators which may be computed using estimated bit ROP: bit wear parameter; gradient of cost per foot; gradient of bit ROP versus WOB; simplified mechanical specific energy; and hydraulic specific energy.

Claim (Index 16):
A method of optimizing drilling performance of a drilling assembly for drilling a borehole in an earth formation using the system of  claim 5 , said method comprising the steps of:\n selecting a setpoint value of at least one variable drilling parameter; operating the drilling assembly to drill the borehole, wherein the at least one variable drilling parameter is set at said setpoint value; determining the value of at least one performance indicator; selecting zero as the next setpoint for the block descent velocity; determining at least one of a second and third value of at least one performance indicator using the formula: \u03c4 = time \ue89e \ue89e constant = WOB ROP \ue89e L EA wherein WOB is defined as weight acting on a drill bit disposed on said drill assembly, ROP is defined as a rate at which said drill assembly penetrates a drill site, L is defined as a length of a drill pipe defined by said drill assembly, E is defined as a modulus of elasticity of material comprising a drill pipe disposed on said drill assembly, A is defined as a cross sectional area of said drill pipe; and, at least one of the formulas: ROP \ue8a0 ( t ) = f \ue8a0 ( BDV ) = BDV \ue8a0 ( t ) \ue89e ( 1 - e - \u0394 \ue89e \ue89e t \u03c4 ) + ROP \ue8a0 ( t - \u0394 \ue89e \ue89e t ) \ue89e ( e - \u0394 \ue89e \ue89e t \u03c4 ) wherein ROP(t) is defined as a rate at which said drill assembly penetrates a drill site as a function of time, wherein said rate is a function of the descent velocity of a block, denoted as BDV, in said drill assembly denoted as f(BDV), wherein K P = CV f \ue8a0 ( BDV ) comprises error raised to an exponent equal to a change in time t divided by said time constant \u03c4, ROP is a rate of penetration of said drill assembly, t is a time of measurement, and \u0394t is a change in time; and, e - \u0394 \ue89e \ue89e t \u03c4 wherein said at least one formula varies said setpoint value of said at least one variable drilling parameter based on the change in value of the at least one performance indicator.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 88.0
- Lexical Diversity: 1.9878
- Patent Class: 700.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14432675', '11567488', '12836895', '15829347', '13283518']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4449599232679356
- 35 USC 102 Novelty (BERT): 0.6178144467460722
- Combined Prediction Score: 0.4622453756157492
- Mean Citation Score: 370.27792200000016
- Max Citation Score: 654.0233
- Similarity Product: 512.6001546768665

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test