"A modular measurement-while-drilling bottom hole assembly, consisting primarily of a bi-directional communication and power module and an electronic sensor module generally having a central processor, data memory and a plurality of sensors for making directional, drilling and formation measurements, namely, direction, temperature, bore and annular pressure, formation density, porosity, resistivity, vibration, stick/slip, gamma ray and other drilling system or formation evaluation measurements, that is used for directional drilling and formation evaluation in subterranean oil, gas, water, mineral and geothermal cell formations."

'annular':50 'assembl':9 'bi':15 'bi-direct':14 'bore':48 'bottom':7 'cell':85 'central':29 'communic':17 'consist':10 'data':31 'densiti':53 'direct':16,40,46,72 'drill':6,41,62,73 'electron':23 'evalu':66,76 'format':43,52,65,75,86 'gamma':58 'gas':80 'general':26 'geotherm':84 'hole':8 'make':39 'measur':4,44,67 'measurement-while-dril':3 'memori':32 'miner':82 'modul':20,25 'modular':2 'name':45 'oil':79 'plural':35 'poros':54 'power':19 'pressur':51 'primarili':11 'processor':30 'ray':59 'resist':55 'sensor':24,37 'stick/slip':57 'subterranean':78 'system':63 'temperatur':47 'use':70 'vibrat':56 'water':81

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