|  | E |
SECTION E — FIXED CONSTRUCTIONS

BUILDING

|  | E21 |
MINING

|  | E21B |
DEEP DRILLING; OBTAINING OIL, GAS, WATER OR SOLUBLE MATERIALS FROM DEEP WELLS

|  | E21B 1/00 - E21B 7/00 |
Devices or methods for deep-drilling

|  | E21B 1/00 |
Percussion drilling

|  | E21B 1/02 |
· | Surface drives for percussion drilling

|  | E21B 1/04 |
· · | Devices for reversing the movement of the rod or cable at the surface

|  | E21B 1/06 |
· | Drives for percussion drilling in the borehole

|  | E21B 1/08 |
· · | Devices for reversing the movement of the rod or cable in the borehole

|  | E21B 1/10 |
· | Drilling jars, i.e. lost-motion connections

|  | E21B 3/00 |
Rotary drilling

|  | E21B 3/02 |
· | Surface drives for rotary drilling

|  | E21B 3/04 |
· · | Rotary tables

|  | E21B 3/06 |
· · | Adaptation of rotary draw works to drive rotary tables (connecting or disconnecting couplings or joints using cat-heads Fulltext... Hierarchy... Expanded...E21B 19/16; rope, cable, or chain winding mechanism, capstans Fulltext... Hierarchy... Expanded...B66D)

|  | E21B 3/08 |
· | Drives used in the borehole

|  | E21B 3/10 |
· · | Electric drives

|  | E21B 3/12 |
· · | Hydraulic or pneumatic drives

|  | E21B 5/00 |
Drives for combined percussion and rotary drilling, whether for use on surface or in the borehole

|  | E21B 7/00 |
Special methods or apparatus for deep-drilling

|  | E21B 7/02 |
· | Portable drilling rigs, truck or skid mounted, with their own drive

|  | E21B 7/04 |
· | Directional drilling

|  | E21B 7/06 |
· · | Deflecting the direction of boreholes

|  | E21B 7/08 |
· · · | Special apparatus for deflecting the boring, e.g. special drill bits, knuckle joints, (knuckle joints for fishing tools Fulltext... Hierarchy... Expanded...E21B 31/00)

|  | E21B 7/10 |
· · | Correction of deflected boreholes

|  | E21B 7/12 |
· | Underwater drilling

|  | E21B 7/14 |
· | Flame drilling (flame piercing of blast holes Fulltext... Hierarchy... Expanded...E21C 21/00)

|  | E21B 7/16 |
· | Applying separate balls or pellets by the pressure of the drill, so-called shot-drilling

|  | E21B 7/18 |
· | Drilling by liquid or gas jets, with or without entrained pellets (Fulltext... Hierarchy... Expanded...E21B 7/14 takes precedence)

|  | E21B 9/00 - E21B 13/00 |
Drilling-tools

|  | E21B 9/00 |
Drill bits, e.g. retractable without withdrawing drill pipe (for deflecting the boring Fulltext... Hierarchy... Expanded...E21B 7/08; valve drill bits Fulltext... Hierarchy... Expanded...E21B 27/00; augeres for making post-holes or for making foundations Fulltext... Hierarchy... Expanded...E02D 17/14; augers for mine drilling Fulltext... Hierarchy... Expanded...E21C 1/14; drill bits for making blast holes Fulltext... Hierarchy... Expanded...E21C 13/00)

|  | E21B 9/02 |
· | Full drill bits

|  | E21B 9/04 |
· · | Twist drill bits

|  | E21B 9/06 |
· · | Fish-tail bits

|  | E21B 9/08 |
· · | Roller full drill bits

|  | E21B 9/10 |
· · · | with conical cutting tools only

|  | E21B 9/12 |
· · · | with separate inner and outer cutting tools, either cylindrical or conical

|  | E21B 9/14 |
· · | with disc-shaped cutting tools only

|  | E21B 9/16 |
· | Core bits

|  | E21B 9/18 |
· · | Roller core bits

|  | E21B 9/20 |
· · | Core bits with inner tube for receiving or retaining the core

|  | E21B 9/22 |
· | Drill bits for enlarging the borehole locally or throughout the whole length

|  | E21B 9/24 |
· · | with non-expansible cutting tools revolving in relation to the drilling rods

|  | E21B 9/26 |
· · | with expansible cutting tools

|  | E21B 9/28 |
· · · | revolving in relation to the drilling rods

|  | E21B 9/30 |
· · · | at the circumference of the bit

|  | E21B 9/32 |
· · · | cutting also the bottom of the borehole

|  | E21B 9/34 |
· | for drilling holes sideways from, or at an angle to, the main borehole

|  | E21B 9/35 |
· | Parts or details

|  | E21B 9/36 |
· · | Special construction of diamond drill bits or wear-resisting inserts

|  | E21B 11/00 |
Other drilling tools

|  | E21B 11/02 |
· | Boring rams

|  | E21B 11/04 |
· | Boring grabs

|  | E21B 11/06 |
· | with driven cutting chains or similarly-driven tools

|  | E21B 13/00 |
Wear indicators for drilling tools

|  | E21B 15/00 - E21B 41/00 |
Other details for deep-drilling

|  | E21B 15/00 |
Derricks; Masts

|  | E21B 15/02 |
· | for underwater drilling (floating artificial islands Fulltext... Hierarchy... Expanded...B63B 35/44; drilling platforms on legs Fulltext... Hierarchy... Expanded...E02B 17/00)

|  | E21B 17/00 |
Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (rod couplings in general Fulltext... Hierarchy... Expanded...F16D; tubes or tube couplings in general Fulltext... Hierarchy... Expanded...F16L)

|  | E21B 17/02 |
· | Couplings; Joints

|  | E21B 17/04 |
· · | between rod and bit, or between rod and rod

|  | E21B 17/042 |
· · · | threaded

|  | E21B 17/043 |
· · · · | with locking means

|  | E21B 17/046 |
· · · | with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches

|  | E21B 17/05 |
· · · | Swivel joints

|  | E21B 17/06 |
· · · | Releasing-joints, e.g. safety joints

|  | E21B 17/08 |
· · | Casing joints

|  | E21B 17/10 |
· | Wear protectors; Centralising devices

|  | E21B 17/12 |
· · | Devices for placing or drawing out wear protectors

|  | E21B 17/14 |
· | Casing shoes

|  | E21B 19/00 |
Handling rods, casings, tubes or the like in the derrick (surface drives Fulltext... Hierarchy... Expanded...E21B 1/02, Fulltext... Hierarchy... Expanded...E21B 3/02)

|  | E21B 19/02 |
· | Rod or cable suspensions (load-engaging elements for hoisting or lowering purposes in general Fulltext... Hierarchy... Expanded...B66C 1/00; crown blocks or pulley blocks Fulltext... Hierarchy... Expanded...B66D; cable guides Fulltext... Hierarchy... Expanded...B66D 1/36)

|  | E21B 19/04 |
· · | Hooks

|  | E21B 19/06 |
· · | Elevators, i.e. rod or tube gripping devices

|  | E21B 19/07 |
· · · | Slip-type elevators (slips in rotary tables Fulltext... Hierarchy... Expanded...E21B 19/10)

|  | E21B 19/08 |
· | Devices for feeding the rods or cables (hoisting drums Fulltext... Hierarchy... Expanded...B66D); Devices for increasing or decreasing the pressure on the drill; Devices for counterbalancing the weight of the rods

|  | E21B 19/10 |
· | Slips; Spiders

|  | E21B 19/12 |
· | Rope clamps (rope clamps in general Fulltext... Hierarchy... Expanded...F16G 11/00)

|  | E21B 19/14 |
· | Racks, ramps, troughs or bins for holding the lengths of rod singly or connected as joints; Handling between storage and borehole

|  | E21B 19/16 |
· | Connecting or disconnecting pipe couplings or joints (pipe wrenches or the like Fulltext... Hierarchy... Expanded...B25B)

|  | E21B 21/00 |
Devices or methods for flushing boreholes (mud screens Fulltext... Hierarchy... Expanded...B03B)

|  | E21B 21/02 |
· | Swivel joints in hose lines

|  | E21B 21/04 |
· | Selection of drilling fluids (drilling fluids per se Fulltext... Hierarchy... Expanded...C10M)

|  | E21B 23/00 |
Devices for setting, locking, releasing or removing tools, packers etc. in boreholes (setting of casings, screens, or liners Fulltext... Hierarchy... Expanded...E21B 43/10)

|  | E21B 23/02 |
· | for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing (Fulltext... Hierarchy... Expanded...E21B 23/04, Fulltext... Hierarchy... Expanded...E21B 23/06 take precedence)

|  | E21B 23/04 |
· | operated by fluid means, e.g. actuated by explosion (Fulltext... Hierarchy... Expanded...E21B 23/06 takes precedence)

|  | E21B 23/06 |
· | for setting packers

|  | E21B 25/00 |
Core barrels; Core breakers; Core extractors

|  | E21B 27/00 |
Bailers (cement bailers Fulltext... Hierarchy... Expanded...E21B 33/132); Valve drill bits

|  | E21B 29/00 |
Cutting of pipes, packers, plugs, or wire lines, located in boreholes, e.g. of damaged pipes, making windows (perforators Fulltext... Hierarchy... Expanded...E21B 43/11); Reconditioning e.g. straightening of well casings while in the ground

|  | E21B 29/02 |
· | by explosives

|  | E21B 31/00 |
Fishing tools for rods, casings, ropes, bits fragments, etc.

|  | E21B 31/02 |
· | for tubular, cylindrical, or conical objects, rods, pipes, drill-bit shans, casings, packers, linings (Fulltext... Hierarchy... Expanded...E21B 31/12 takes precedence)

|  | E21B 31/04 |
· | for irregularly-shaped objects, e.g. bailers, pump parts, instruments, drill-bit bodies, stones (Fulltext... Hierarchy... Expanded...E21B 31/12 takes precedence)

|  | E21B 31/06 |
· · | gripping magnetically

|  | E21B 31/08 |
· · | using junk baskets or the like

|  | E21B 31/10 |
· | for parted wire lines or ropes

|  | E21B 31/12 |
· | Fishing tools; Fishing grabs

|  | E21B 33/00 |
Sealing or packing boreholes

|  | E21B 33/02 |
· | Surface sealing or packing

|  | E21B 33/03 |
· · | Well heads

|  | E21B 33/035 |
· · · | specially adapted for underwater installations

|  | E21B 33/04 |
· · · | Casing heads

|  | E21B 33/05 |
· · · · | Cementing-heads, e.g. with provisions for introducing cementing plugs

|  | E21B 33/06 |
· · · · | Blow-out preventers

|  | E21B 33/08 |
· · | Wipers; Oil savers

|  | E21B 33/10 |
· | in the borehole

|  | E21B 33/12 |
· · | Packers; Plugs (used for cementing Fulltext... Hierarchy... Expanded...E21B 33/134, Fulltext... Hierarchy... Expanded...E21B 33/16)

|  | E21B 33/122 |
· · · | Multiple-string packers

|  | E21B 33/124 |
· · · | Units with longitudinally-spaced plugs for isolating the intermediate space

|  | E21B 33/126 |
· · · | with fluid-pressure-operated elastic cup or skirt (Fulltext... Hierarchy... Expanded...E21B 33/122, Fulltext... Hierarchy... Expanded...E21B 33/124 take precedence)

|  | E21B 33/127 |
· · · | with inflatable sleeve (Fulltext... Hierarchy... Expanded...E21B 33/122, Fulltext... Hierarchy... Expanded...E21B 33/124 take precedence)

|  | E21B 33/128 |
· · · | with a member expanded radially by axial pressure (Fulltext... Hierarchy... Expanded...E21B 33/122, Fulltext... Hierarchy... Expanded...E21B 33/124 take precedence)

|  | E21B 33/129 |
· · · | with mechanical slips for hooking into the casing (Fulltext... Hierarchy... Expanded...E21B 33/122, Fulltext... Hierarchy... Expanded...E21B 33/124 take precedence)

|  | E21B 33/13 |
· · | Methods or devices for cementing, for plugging holes, crevices, or the like

|  | E21B 33/132 |
· · · | Cement bailers

|  | E21B 33/134 |
· · · | Bridging plugs

|  | E21B 33/136 |
· · · | Baskets, e.g. of umbrella type

|  | E21B 33/138 |
· · · | Plastering the borehole wall; Injecting into the formation

|  | E21B 33/14 |
· · · | for cementing casings into boreholes

|  | E21B 33/16 |
· · · · | using plugs for isolating cement charge; Plugs therefor

|  | E21B 35/00 |
Devices or methods for preventing or extinguishing fires (fire-fighting in general Fulltext... Hierarchy... Expanded...A62C, d)

|  | E21B 37/00 |
Cleaning devices for boreholes (Fulltext... Hierarchy... Expanded...E21B 21/00 takes precedence; devices for cleaning pipes Fulltext... Hierarchy... Expanded...B08)

|  | E21B 37/02 |
· | Scrapers

|  | E21B 39/00 |
Gas or water separators or the like for use in the borehole

|  | E21B 40/00 |
Tubing catchers, automatically arresting the fall of oil-well tubing

|  | E21B 41/00 |
Other details not mentioned before for deep-drilling

|  | E21B 43/00 |
Obtaining oil, water, or the like

|  | E21B 43/00 |
Devices or methods for obtaining oil, gas, water or soluble materials from deep wells (mining of oil-bearing deposits Fulltext... Hierarchy... Expanded...E21C 41/10; pumps Fulltext... Hierarchy... Expanded...F04)

|  | E21B 43/01 |
· | specially adapted for obtaining from underwater installations

|  | E21B 43/02 |
· | Subsoil filtering (Fulltext... Hierarchy... Expanded...E21B 43/11 takes precedence)

|  | E21B 43/04 |
· · | Gravelling of wells

|  | E21B 43/08 |
· · | Screens or liners

|  | E21B 43/10 |
· · | Setting of casings, screens, or liners in wells (setting of tools, packers or the like Fulltext... Hierarchy... Expanded...E21B 23/00)

|  | E21B 43/11 |
· | Perforators; Permeators

|  | E21B 43/112 |
· · | Perforators with extendable perforating members, e.g. actuated by fluid means

|  | E21B 43/114 |
· · | Perforators using direct fluid action, e.g. abrasive jets

|  | E21B 43/116 |
· · | Gun or shaped charge perforators

|  | E21B 43/117 |
· · · | Shaped charge perforators (Fulltext... Hierarchy... Expanded...E21B 43/118 takes precedence)

|  | E21B 43/118 |
· · · | characterised by lowering in vertical position and subsequent tilting to operating position

|  | E21B 43/119 |
· · | Details, e.g. for locating perforating place or direction

|  | E21B 43/12 |
· | Methods or apparatus for regulating the flow of oil to or in well (Fulltext... Hierarchy... Expanded...E21B 43/25 takes precedence)

|  | E21B 43/14 |
· | Obtaining from a multiple-zone well

|  | E21B 43/16 |
· | Secondary recovery methods of oil (pumps Fulltext... Hierarchy... Expanded...F04)

|  | E21B 43/18 |
· · | Repressuring or vacuum methods

|  | E21B 43/20 |
· · | Displacing by water

|  | E21B 43/22 |
· · | Use of chemicals or bacteria activity (Fulltext... Hierarchy... Expanded...E21B 43/27 takes precedence; chemical features in extracting oils from oil sands or shales Fulltext... Hierarchy... Expanded...C10G)

|  | E21B 43/24 |
· · | Use of heat

|  | E21B 43/25 |
· | Methods for stimulating production

|  | E21B 43/26 |
· · | by forming crevices, e.g. by shooting, by blasting

|  | E21B 43/27 |
· · · | by use of eroding chemicals, e.g. acids

|  | E21B 43/28 |
· | Dissolving soluble minerals, e.g. salt

|  | E21B 45/00 - E21B 49/00 |
Surveying or testing

|  | E21B 45/00 |
Measuring the drilling time or rate of penetration

|  | E21B 47/00 |
Survey of wells (geophysical logging Fulltext... Hierarchy... Expanded...G01C)

|  | E21B 47/02 |
· | Determining slope or direction (clinometers or direction meters Fulltext... Hierarchy... Expanded...G01C)

|  | E21B 47/022 |
· · | of the borehole

|  | E21B 47/024 |
· · | of devices in the borehole (Fulltext... Hierarchy... Expanded...E21B 47/022 takes precedence)

|  | E21B 47/026 |
· · | of penetrated ground layers (formation testing Fulltext... Hierarchy... Expanded...E21B 49/00)

|  | E21B 47/04 |
· | Measuring depth or liquid level (measuring liquid level in general Fulltext... Hierarchy... Expanded...G01F)

|  | E21B 47/06 |
· | Measuring temperature or pressure (measuring temperature in general Fulltext... Hierarchy... Expanded...G01K; measuring pressure in general Fulltext... Hierarchy... Expanded...G01L)

|  | E21B 47/08 |
· | Measuring the diameter (measuring diameter in general Fulltext... Hierarchy... Expanded...G01B)

|  | E21B 47/10 |
· | Locating fluid leaks, intrusions, or movements

|  | E21B 47/12 |
· | Means for transmitting measuring-signals from the well to the surface (remote indicating in general Fulltext... Hierarchy... Expanded...G01D, Fulltext... Hierarchy... Expanded...G08)

|  | E21B 49/00 |
Testing the nature of borehole walls; Formation testing

|  | E21B 49/02 |
· | by mechanically taking samples of the soil (devices for taking samples in general Fulltext... Hierarchy... Expanded...G01N)

|  | E21B 49/04 |
· · | with projectiles penetrating the wall

|  | E21B 49/06 |
· · | with side-wall drilling tools or scrapers