Patents for Class 175/58 :: Sampling of earth formations

Matches 251 - 300 out of 309	< 1 2 3 4 5 6 7 >

Document	Document Title
3112799	Coring fluid
3107742	Apparatus for recovery of drill cuttings from subsurface earth formations
3107740	Core-sampling appliance for graphite-type nuclear reactor
3098533	Electric discharge impulse submarine drivers
3080005	Sidewall sampler
3062045	Augers for soil survey and a process of using said augers
3059707	Method and apparatus for orienting cores
3028921	Method for drilling well bores
3026951	Hydraulic soil sampler
3017707	Excavation machine
3016959	Core sampling arrangement for operation inside geological layers
2937005	Core sampler
2929612	Telescoping core drill
2914950	Bottom testing device
2898086	Method of drilling
2886289	Slip joints
2852230	Side wall coring and bottom hole drilling tool
2783969	Method and apparatus for cutting cores
2728553	Apparatus for collecting drilling samples
2710169	Method for determining the dip and strike of formations traversed by a borehole
2666620	Oil well coring method
2650068	Coring method and apparatus
2585369	Side-wall sampler
2571644	Apparatus for drilling and recovering side wall cores
2558452	Side wall sample taker
2555462	Whipstock
2544728	Mineral sampling implement
2511508	Seat for side wall sampling tools
2341574	Method of drilling wells
2336613	Geochemical well logging
2315629	Wall core scraper
2212067	Drilling apparatus
2170716	Method and apparatus for taking sample cores
2147896	Core taking apparatus
2082329	Method of drilling and simultaneously exploring oil wells and the like
2080978	Method of taking oriented cores
2065725	Method of core drilling
2023966	Method and means for sinking foundation columns
1984867	Core drill
1919461	Method of and means for taking soil tests
1891628	Method of determining angle and direction of dip of geological formations
1864113	Apparatus and method of taking core samples of rock in bore holes
1853581	Method and apparatus for scavenging core drills
1816991	Fishing tool
1750744	Rotary core bit
1737256	Plug for core drills
1705623	Earth sampler
1674117	Earth sampler
1606651	Automatic formation sampler for deep wells
1599140	Earth sampler

Matches 251 - 300 out of 309	< 1 2 3 4 5 6 7 >