IPC-Stelle: E21B 33/13 [Version 2006.01]

SymbolTypTitel
ESKSECTION E — FIXED CONSTRUCTIONS
E21USKEARTH OR ROCK DRILLING; MINING
E21KLEARTH OR ROCK DRILLING; MINING
E21BUKLEARTH OR ROCK DRILLING (mining, quarrying E21C; making shafts, driving galleries or tunnels E21D); OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS [5]
E21B 1/00ZWMethods or apparatus for drilling
E21B 1/00HGRPercussion drilling (drives used in the borehole E21B 4/00) [3]
E21B 1/02UGR1
.Surface drives for drop hammers, e.g. with a cable [1, 7]
E21B 1/04UGR2
. .Devices for reversing the movement of the rod or cable at the surface
E21B 1/12UGR1
.with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) [7]
E21B 1/14UGR2
. .driven by a rotating mechanism [7]
E21B 1/16UGR3
. . .with spring-mounted reciprocating masses, e.g. with air cushion [7]
E21B 1/18UGR4
. . . .with elastic joining of the drive to the push-rod by double buffer springs [7]
E21B 1/20UGR3
. . .formed as centrifugal hammers [7]
E21B 1/22UGR2
. .driven by electromagnets [7]
E21B 1/24UGR2
. .the impulse member being a piston driven directly by fluid pressure [7]
E21B 1/26UGR3
. . .by liquid pressure [7]
E21B 1/28UGR4
. . . .working with pulses [7]
E21B 1/30UGR3
. . .by air, steam or gas pressure [7]
E21B 1/32UGR4
. . . .working with pulses [7]
E21B 1/34UGR5
. . . . .the impulse member being a piston of an internal-combustion engine [7]
E21B 1/36UGR1
.Tool-carrier piston type, i.e. in which the tool is connected to an impulse member [7]
E21B 1/38UGR1
.Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member [7]
E21B 3/00HGRRotary drilling (drives used in the borehole E21B 4/00; rotary drilling machines in general B23B) [3]
E21B 3/02UGR1
.Surface drives for rotary drilling
E21B 3/025UGR2
. .with a to-and-fro rotation of the tool [7]
E21B 3/03UGR2
. .with an intermittent unidirectional rotation of the tool [7]
E21B 3/035UGR2
. .with slipping or elastic transmission [7]
E21B 3/04UGR2
. .Rotary tables
E21B 3/06UGR3
. . .Adaptation of rotary draw works to drive rotary tables (connecting or disconnecting couplings or joints E21B 19/16; rope, cable, or chain winding mechanisms, capstans B66D) [3]
E21B 4/00HGRDrives used in the borehole [3]
E21B 4/02UGR1
.Fluid rotary type drives (hydraulic turbines for drilling wells F03B 13/02) [3]
E21B 4/04UGR1
.Electric drives (E21B 4/12 takes precedence) [3]
E21B 4/06UGR1
.Down-hole impacting means, e.g. hammers (percussion drill bits E21B 10/36; boring rams E21B 11/02; releasing-jars E21B 31/107) [3]
E21B 4/08UGR2
. .impact being obtained by gravity only, e.g. with lost-motion connection [3]
E21B 4/10UGR2
. .continuous unidirectional rotary motion of shaft or drilling pipe effecting consecutive impacts [3]
E21B 4/12UGR2
. .Electrically operated hammers [3]
E21B 4/14UGR2
. .Fluid operated hammers [3]
E21B 4/16UGR1
.Plural down-hole drives, e.g. for combined percussion and rotary drilling (E21B 4/10 takes precedence); Drives for multi-bit drilling units [3]
E21B 4/18UGR1
.Anchoring or feeding in the borehole [3, 7]
E21B 4/20UGR1
.combined with surface drive (E21B 4/10 takes precedence) [3]
E21B 6/00HGRDrives for drilling with combined rotary and percussive action (drives used in the borehole E21B 4/00; portable percussive machines with superimposed rotation B25D 16/00) [3]
E21B 6/02UGR1
.the rotation being continuous [7]
E21B 6/04UGR2
. .Separate drives for percussion and rotation [7]
E21B 6/06UGR1
.the rotation being intermittent, e.g. obtained by a ratchet device [7]
E21B 6/08UGR2
. .Separate drives for percussion and rotation [7]
E21B 7/00HGRSpecial methods or apparatus for drilling (supports for the drilling machine, e.g. derricks or masts, E21B 15/00) [1, 7]
E21B 7/02UGR1
.Drilling rigs characterised by means for land transport, e.g. skid mounting or wheel mounting (portable drilling rigs for use on underwater floors E21B 7/124) [1, 7]
E21B 7/04UGR1
.Directional drilling
E21B 7/06UGR2
. .Deflecting the direction of boreholes
E21B 7/08UGR3
. . .Special apparatus for deflecting the boring, e.g. special drill bits, knuckle joints, whipstocks (directional window cutting E21B 29/06; deflecting the direction of fishing tools E21B 31/14)
E21B 7/10UGR2
. .Correction of deflected boreholes
E21B 7/12UGR1
.Underwater drilling (telescoping joints E21B 17/07; using heave compensators E21B 19/09; well heads specially adapted for underwater installations E21B 33/035) [1, 7]
E21B 7/124UGR2
. .with underwater tool drive prime mover, e.g. portable drilling rigs for use on underwater floors [3]
E21B 7/128UGR2
. .from floating support with independent underwater anchored guide base [3]
E21B 7/132UGR2
. .from underwater buoyant support [3]
E21B 7/136UGR2
. .from non-buoyant support (E21B 7/124 takes precedence) [3]
E21B 7/14UGR1
.Drilling by use of heat, e.g. flame drilling
E21B 7/15UGR2
. .of electrically generated heat [3]
E21B 7/16UGR1
.Applying separate balls or pellets by the pressure of the drill, so-called shot-drilling
E21B 7/18UGR1
.Drilling by liquid or gas jets, with or without entrained pellets (E21B 7/14 takes precedence; hydraulic monitors E21C 45/00) [5]
E21B 7/20UGR1
.Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes (surface means for applying to-and-fro rotation movements to the casing E21B 3/025; placing piles E02D 7/00; sinking shafts while moving the lining downwards E21D 1/08) [3]
E21B 7/24UGR1
.Drilling using vibrating or oscillating means, e.g. out-of-balance masses (percussion drilling E21B 1/00) [3]
E21B 7/26UGR1
.Drilling without earth removal, e.g. with self-propelled burrowing devices (E21B 7/30 takes precedence; down-hole drives E21B 4/00) [3, 6]
E21B 7/28UGR1
.Enlarging drilled holes, e.g. by counterboring (drill bits for enlarging the borehole E21B 10/26) [3]
E21B 7/30UGR2
. .without earth removal [6]
E21B 10/00ZWDrilling tools
E21B 10/00HGRDrill bits (specially adapted for deflecting the direction of boring E21B 7/08; with means for collecting substances E21B 27/00) [3, 2006.01]
E21B 10/02UGR1
.Core bits (characterised by wear resisting parts E21B 10/46; obtaining undisturbed cores E21B 25/00) [3]
E21B 10/04UGR2
. .with core destroying means [3]
E21B 10/06UGR2
. .Roller core bits [3]
E21B 10/08UGR1
.Roller bits (roller core bits E21B 10/06; with leading portion E21B 10/26; characterised by wear resisting parts E21B 10/46) [3]
E21B 10/10UGR2
. .with roller axle supported at both ends (with disc cutters E21B 10/12) [3]
E21B 10/12UGR2
. .with disc cutters [3]
E21B 10/14UGR2
. .combined with non-rolling cutters other than of leading-portion type [3]
E21B 10/16UGR2
. .characterised by tooth form or arrangement [3]
E21B 10/18UGR2
. .characterised by conduits or nozzles for drilling fluids (drilling fluid supply to the bearings E21B 10/23) [3, 2006.01]
E21B 10/20UGR2
. .characterised by detachable or adjustable parts, e.g. legs or axles (cross axle roller bits E21B 10/10) [3]
E21B 10/22UGR2
. .characterised by bearing, lubrication or sealing details [3, 2006.01]
E21B 10/23UGR3
. . .with drilling fluid supply to the bearings [2006.01]
E21B 10/24UGR3
. . .characterised by lubricating details (E21B 10/23 takes precedence) [3, 2006.01]
E21B 10/25UGR3
. . .characterised by sealing details [2006.01]
E21B 10/26UGR1
.Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers (percussion drill bits with leading portion E21B 10/40; augers with leading portion E21B 10/44) [3]
E21B 10/28UGR2
. .with non-expansible roller cutters [3]
E21B 10/30UGR3
. . .Longitudinal axis roller reamers, e.g. reamer stabilisers [3]
E21B 10/32UGR2
. .with expansible cutting tools [3]
E21B 10/34UGR3
. . .of roller-cutter type [3]
E21B 10/36UGR1
.Percussion drill bits (characterised by wear resisting parts E21B 10/46) [3]
E21B 10/38UGR2
. .characterised by conduits or nozzles for drilling fluids [3]
E21B 10/40UGR2
. .with leading portion [3]
E21B 10/42UGR1
.Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits (characterised by wear resisting parts E21B 10/46, by conduits or nozzles for drilling fluid E21B 10/60, by detachable parts E21B 10/62) [3, 2006.01]
E21B 10/43UGR2
. .characterised by the arrangement of teeth or other cutting elements [2006.01]
E21B 10/44UGR1
.Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts (E21B 10/42 takes precedence; drilling rods with helical structure E21B 17/22) [3, 2006.01]
E21B 10/46UGR1
.characterised by wear resisting parts, e.g. diamond inserts [3]
E21B 10/48UGR2
. .the bit being of core type [3]
E21B 10/50UGR2
. .the bit being of roller type [3]
E21B 10/52UGR3
. . .with chisel- or button-type inserts [3]
E21B 10/54UGR2
. .the bit being of the rotary drag type, e.g. fork-type bits [3, 2006.01]
E21B 10/55UGR3
. . .with preformed cutting elements (inserts per seE21B 10/56, E21B 10/58) [2006.01]
E21B 10/56UGR2
. .Button-type inserts (E21B 10/52 takes precedence) [3]
E21B 10/567UGR3
. . .with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts [2006.01]
E21B 10/573UGR4
. . . .characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element [2006.01]
E21B 10/58UGR2
. .Chisel-type inserts (E21B 10/52, E21B 10/54 take precedence) [3]
E21B 10/60UGR1
.characterised by conduits or nozzles for drilling fluids (for roller bits E21B 10/18; for percussion drill bits E21B 10/38) [3]
E21B 10/61UGR2
. .characterised by nozzle structure [2006.01]
E21B 10/62UGR1
.characterised by parts, e.g. cutting elements, which are detachable or adjustable (E21B 10/64 takes precedence; for roller bits E21B 10/20; for augers E21B 10/44) [3, 2006.01]
E21B 10/627UGR2
. .with plural detachable cutting elements [2006.01]
E21B 10/633UGR3
. . .independently detachable [2006.01]
E21B 10/64UGR1
.characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe (retrievable core receivers E21B 25/02) [3]
E21B 10/66UGR2
. .the cutting element being movable through the drilling pipe and laterally shiftable [3]
E21B 11/00HGROther drilling tools
E21B 11/02UGR1
.Boring rams (percussion drives used in the borehole E21B 4/06; percussion drill bits E21B 10/36)
E21B 11/04UGR1
.Boring grabs
E21B 11/06UGR1
.with driven cutting chains or similarly-driven tools
E21B 12/00HGRAccessories for drilling tools [3]
E21B 12/02UGR1
.Wear indicators [3]
E21B 12/04UGR1
.Drill bit protectors [3]
E21B 12/06UGR1
.Mechanical cleaning devices [3]
E21B 15/00ZWOther equipment or details for drilling; Well equipment or well maintenance
E21B 15/00HGRSupports for the drilling machine, e.g. derricks or masts [1, 7]
E21B 15/02UGR1
.specially adapted for underwater drilling (E21B 15/04 takes precedence; floating drilling platforms B63B 35/44; drilling platforms on legs E02B 17/00) [3]
E21B 15/04UGR1
.specially adapted for directional drilling, e.g. slant hole rigs [3]
E21B 17/00HGRDrilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (rod couplings in general F16D; tubes or tube couplings in general F16L)
E21B 17/01UGR1
.Risers (riser connectors E21B 33/038) [3]
E21B 17/02UGR1
.Couplings; Joints
E21B 17/03UGR2
. .between drilling rod or pipe and drill motor, e.g. between drilling rod and hammer [7]
E21B 17/04UGR2
. .between rod and bit, or between rod and rod
E21B 17/042UGR3
. . .threaded
E21B 17/043UGR4
. . . .with locking means
E21B 17/046UGR3
. . .with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
E21B 17/05UGR3
. . .Swivel joints
E21B 17/06UGR3
. . .Releasing-joints, e.g. safety joints
E21B 17/07UGR3
. . .Telescoping joints for varying drill string lengths; Shock absorbers (heave compensators in the derrick E21B 19/09; releasing-jars E21B 31/107) [3]
E21B 17/08UGR2
. .Casing joints
E21B 17/10UGR1
.Wear protectors; Centralising devices (drives used in the borehole with anchoring means E21B 4/18; guiding or centralising devices outside the borehole E21B 19/24)
E21B 17/12UGR2
. .Devices for placing or drawing out wear protectors
E21B 17/14UGR1
.Casing shoes
E21B 17/16UGR1
.Drill collars [3]
E21B 17/18UGR1
.Pipes provided with plural fluid passages (circulation of drilling fluid by means of such pipes E21B 21/12) [3]
E21B 17/20UGR1
.Flexible or articulated drilling pipes [3]
E21B 17/22UGR1
.Rods or pipes with helical structure (drill bits with helical conveying portion E21B 10/44) [3]
E21B 19/00HGRHandling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables (surface drives E21B 1/02, E21B 3/02)
E21B 19/02UGR1
.Rod or cable suspensions (load-engaging elements for hoisting or lowering purposes in general B66C 1/00; crown blocks or pulley blocks B66D; cable guides B66D 1/36)
E21B 19/04UGR2
. .Hooks
E21B 19/06UGR2
. .Elevators, i.e. rod- or tube-gripping devices
E21B 19/07UGR3
. . .Slip-type elevators (slips in rotary tables E21B 19/10)
E21B 19/08UGR1
.Apparatus for feeding the rods or cables (E21B 19/22 takes precedence; automatic feed E21B 44/02; hoisting drums B66D); Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods [3, 7]
E21B 19/081UGR2
. .Screw-and-nut feed mechanisms [7]
E21B 19/083UGR2
. .Cam, rack or like feed mechanisms [7]
E21B 19/084UGR2
. .with flexible drawing means, e.g. cables [7]
E21B 19/086UGR2
. .with a fluid-actuated cylinder (E21B 19/084, E21B 19/087, E21B 19/09 take precedence) [7]
E21B 19/087UGR2
. .by means of a swinging arm [7]
E21B 19/089UGR2
. .with a spring or an additional weight [7]
E21B 19/09UGR2
. .specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string (drilling-pipe telescoping joints E21B 17/07) [3]
E21B 19/10UGR1
.Slips; Spiders
E21B 19/12UGR1
.Rope clamps (rope clamps in general F16G 11/00)
E21B 19/14UGR1
.Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole (E21B 19/20, E21B 19/22 take precedence) [3]
E21B 19/15UGR2
. .Racking of rods in horizontal position; Handling between horizontal and vertical position [3]
E21B 19/16UGR1
.Connecting or disconnecting pipe couplings or joints (E21B 19/20 takes precedence; pipe wrenches or the like B25B) [3]
E21B 19/18UGR1
.Connecting or disconnecting drill bit and drilling pipe [3]
E21B 19/20UGR1
.Combined feeding from rack and connecting, e.g. automatically [3]
E21B 19/22UGR1
.Handling reeled pipe or rod units, e.g. flexible drilling pipes [3]
E21B 19/24UGR1
.Guiding or centralising devices for drilling rods or pipes [7]
E21B 21/00HGRMethods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (freeing objects stuck in boreholes by flushing E21B 31/03; well drilling compositions C09K 8/02) [2, 7]
E21B 21/01UGR1
.Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes (arrangements for treating drilling fluids E21B 21/06) [7]
E21B 21/015UGR2
. .Means engaging the bore entrance, e.g. hoods for collecting dust [7]
E21B 21/02UGR1
.Swivel joints in hose lines
E21B 21/06UGR1
.Arrangements for treating drilling fluids outside the borehole (treating steps per se, see the relevant subclasses) [3]
E21B 21/07UGR2
. .for treating dust-laden gaseous fluids [7]
E21B 21/08UGR1
.Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure (valve arrangements therefor E21B 21/10) [3]
E21B 21/10UGR1
.Valves arrangements in drilling-fluid circulation systems (valves in general F16K) [3]
E21B 21/12UGR1
.using drilling pipes with plural fluid passages, e.g. closed circulation systems (pipes with plural fluid passages E21B 17/18) [3]
E21B 21/14UGR1
.using liquids and gases, e.g. foams [3]
E21B 21/16UGR1
.using gaseous fluids (E21B 21/14 takes precedence; arrangements for handling drilling fluids outside the borehole E21B 21/01; arrangements for treating drilling fluids E21B 21/06) [7]
E21B 21/18UGR1
.Preventing exhaust air from the drill motor from blowing-off towards the working face [7]
E21B 23/00HGRApparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (setting of casings, screens, or liners E21B 43/10)
E21B 23/01UGR1
.for anchoring the tools or the like (E21B 23/02-E21B 23/06 take precedence; anchoring of drives in the borehole E21B 4/18) [6]
E21B 23/02UGR1
.for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing (E21B 23/03-E21B 23/06 take precedence) [3]
E21B 23/03UGR1
.for setting the tools into, or removing the tools from, laterally offset landing nipples or pockets [3]
E21B 23/04UGR1
.operated by fluid means, e.g. actuated by explosion (E21B 23/06, E21B 23/08 take precedence) [3]
E21B 23/06UGR1
.for setting packers
E21B 23/08UGR1
.Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems (special provisions on heads therefor E21B 33/068; cementing plugs E21B 33/16; scrapers operated by fluid pressure E21B 37/04) [3]
E21B 23/10UGR2
. .Tools specially adapted therefor [3]
E21B 23/12UGR2
. .Tool diverters [3]
E21B 23/14UGR1
.for displacing a cable or a cable-operated tool, e.g. for logging or perforating operations in deviated wells (by fluid pressure E21B 23/08; provision on well heads for introducing or removing cable-operated tools E21B 33/072, E21B 33/076) [6]
E21B 25/00HGRApparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (core bits E21B 10/02; using explosives or projectiles in boreholes E21B 49/04; side-wall sampling or coring E21B 49/06)
E21B 25/02UGR1
.the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe (retrievable drill bits E21B 10/64) [3]
E21B 25/04UGR2
. .the core receiver having a core forming cutting edge or element, e.g. punch type core barrels [3]
E21B 25/06UGR1
.the core receiver having a flexible liner or inflatable retaining means [3]
E21B 25/08UGR1
.Coating, freezing, consolidating cores (E21B 25/06 takes precedence); Recovering uncontaminated cores or cores at formation pressure [3]
E21B 25/10UGR1
.Formed core retaining or severing means (E21B 25/06, E21B 25/08 take precedence) [3]
E21B 25/12UGR2
. .of the sliding wedge type [3]
E21B 25/14UGR2
. .mounted on pivot transverse to core axis [3]
E21B 25/16UGR1
.for obtaining oriented cores [3]
E21B 25/18UGR1
.the core receiver being specially adapted for operation under water [3]
E21B 27/00HGRContainers for collecting or depositing substances in boreholes or wells, e.g. bailers for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits [6, 2006.01]
E21B 27/02UGR1
.Dump bailers, i.e. containers for depositing substances, e.g. cement or acids [6, 2006.01]
E21B 27/04UGR1
.where the collecting or depositing means include helical conveying means [2006.01]
E21B 28/00HGRVibration generating arrangements for boreholes or wells, e.g. for stimulating production (for drilling E21B 7/24; for transmitting measuring-signals E21B 47/14; for geophysical measurements G01V 1/02) [6]
E21B 29/00HGRCutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows (perforators E21B 43/11); Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
E21B 29/02UGR1
.by explosives or by thermal or chemical means (destroying objects in boreholes or wells by explosives E21B 31/16)
E21B 29/04UGR1
.Cutting of wire lines or the like (E21B 29/02 takes precedence) [3]
E21B 29/06UGR1
.Cutting windows, e.g. directional window cutters for whipstock operations (E21B 29/08 takes precedence; whipstocks E21B 7/08) [3]
E21B 29/08UGR1
.Cutting or deforming pipes to control fluid flow (blow-out preventers E21B 33/06) [3]
E21B 29/10UGR1
.Reconditioning of well casings, e.g. straightening [3]
E21B 29/12UGR1
.specially adapted for underwater installations (E21B 29/08 takes precedence) [3]
E21B 31/00HGRFishing for or freeing objects in boreholes or wells (provisions on well heads for introducing or removing objects E21B 33/068; locating or determining the position of objects in boreholes or wells E21B 47/09)
E21B 31/03UGR1
.Freeing by flushing [3]
E21B 31/06UGR1
.using magnetic means [3]
E21B 31/08UGR1
.using junk baskets or the like [3]
E21B 31/107UGR1
.using impact means for releasing stuck parts, e.g. jars (telescoping joints E21B 17/07) [3]
E21B 31/113UGR2
. .hydraulically operated [3]
E21B 31/12UGR1
.Grappling tools, e.g. tongs or grabs
E21B 31/14UGR2
. .with means deflecting the direction of the tool, e.g. by use of knuckle joints (apparatus for deflecting the boring E21B 7/08) [3]
E21B 31/16UGR2
. .combined with cutting or destroying means (cutting or destroying means per seE21B 29/00) [3]
E21B 31/18UGR2
. .gripping externally, e.g. overshot [3]
E21B 31/20UGR2
. .gripping internally, e.g. fishing spears [3]
E21B 33/00HGRSealing or packing boreholes or wells
E21B 33/02UGR1
.Surface sealing or packing
E21B 33/03UGR2
. .Well heads; Setting-up thereof (valve arrangements therefor E21B 34/02)
E21B 33/035UGR3
. . .specially adapted for underwater installations (E21B 33/043, E21B 33/064, E21B 33/076 take precedence) [3]
E21B 33/037UGR4
. . . .Protective housings therefor [3]
E21B 33/038UGR4
. . . .Connectors used on well heads, e.g. for connecting blow-out preventer and riser (connecting a production flow line to an underwater well head E21B 43/013) [3]
E21B 33/04UGR3
. . .Casing heads; Suspending casings or tubings in well heads (setting of casings in wells E21B 43/10)
E21B 33/043UGR4
. . . .specially adapted for underwater well heads (E21B 33/047 takes precedence) [3]
E21B 33/047UGR4
. . . .for plural tubing strings [3]
E21B 33/05UGR4
. . . .Cementing-heads, e.g. having provision for introducing cementing plugs
E21B 33/06UGR3
. . .Blow-out preventers [3]
E21B 33/064UGR4
. . . .specially adapted for underwater well heads (connectors therefor E21B 33/038) [3]
E21B 33/068UGR3
. . .having provision for introducing objects or fluids into, or removing objects from, wells (cementing-heads E21B 33/05) [3]
E21B 33/072UGR4
. . . .for cable-operated tools (E21B 33/076 takes precedence) [3]
E21B 33/076UGR4
. . . .specially adapted for underwater installations [3]
E21B 33/08UGR2
. .Wipers; Oil savers
E21B 33/10UGR1
.in the borehole
E21B 33/12UGR2
. .Packers; Plugs (used for cementing E21B 33/134, E21B 33/16)
E21B 33/122UGR3
. . .Multiple-string packers
E21B 33/124UGR3
. . .Units with longitudinally-spaced plugs for isolating the intermediate space
E21B 33/126UGR3
. . .with fluid-pressure-operated elastic cup or skirt (E21B 33/122, E21B 33/124 take precedence)
E21B 33/127UGR3
. . .with inflatable sleeve (E21B 33/122, E21B 33/124 take precedence)
E21B 33/128UGR3
. . .with a member expanded radially by axial pressure (E21B 33/122, E21B 33/124 take precedence)
E21B 33/129UGR3
. . .with mechanical slips for hooking into the casing (E21B 33/122, E21B 33/124 take precedence)
E21B 33/1295UGR4
. . . .actuated by fluid pressure [6]
E21B 33/13UGR2
. .Methods or devices for cementing, for plugging holes, crevices, or the like (dump bailers E21B 27/02; chemical compositions therefor C09K 8/00) [1, 2006.01]
E21B 33/134UGR3
. . .Bridging plugs
E21B 33/136UGR3
. . .Baskets, e.g. of umbrella type
E21B 33/138UGR3
. . .Plastering the borehole wall; Injecting into the formation
E21B 33/14UGR3
. . .for cementing casings into boreholes
E21B 33/16UGR4
. . . .using plugs for isolating cement charge; Plugs therefor
E21B 34/00HGRValve arrangements for boreholes or wells (in drilling fluid circulation systems E21B 21/10; blow-out preventers E21B 33/06; oil flow regulating apparatus E21B 43/12; valves in general F16K) [3]
E21B 34/02UGR1
.in well heads [3]
E21B 34/04UGR2
. .in underwater well heads [3]
E21B 34/06UGR1
.in wells [3]
E21B 34/08UGR2
. .responsive to flow or pressure of the fluid obtained (E21B 34/10 takes precedence) [3]
E21B 34/10UGR2
. .operated by control fluid supplied from outside the borehole (control means being outside the borehole E21B 34/16) [3]
E21B 34/12UGR2
. .operated by movement of casings or tubings [3]
E21B 34/14UGR2
. .operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools [3]
E21B 34/16UGR1
.Control means therefor being outside the borehole [3]
E21B 35/00HGRMethods or apparatus for preventing or extinguishing fires (cutting or deforming pipes to control fluid flow E21B 29/08; controlling flow of fluid to or in wells E21B 43/12; fire fighting in general A62C, A62D)
E21B 36/00HGRHeating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones (drilling by use of heat E21B 7/14; secondary recovery methods using heat E21B 43/24) [3]
E21B 36/02UGR1
.using burners [3]
E21B 36/04UGR1
.using electrical heaters [3]
E21B 37/00HGRMethods or apparatus for cleaning boreholes or wells (E21B 21/00 takes precedence; cleaning pipes in general B08B 9/02)
E21B 37/02UGR1
.Scrapers specially adapted therefor
E21B 37/04UGR2
. .operated by fluid pressure, e.g. free-piston scrapers (operating other tools by fluid pressure E21B 23/08) [3]
E21B 37/06UGR1
.using chemical means for preventing or limiting the deposition of paraffins or like substances (chemical compositions therefor C09K 8/52) [3, 2006.01]
E21B 37/08UGR1
.cleaning in situ of down-hole filters, screens, or gravel packs (E21B 37/06 takes precedence) [3]
E21B 37/10UGR1
.Well swabs [3]
E21B 40/00HGRTubing catchers, automatically arresting the fall of oil-well tubing
E21B 41/00HGREquipment or details not covered by groups E21B 15/00-E21B 40/00
E21B 41/02UGR1
.in situ inhibition of corrosion in boreholes or wells (dump bailers E21B 27/02; chemical compositions therefor C09K 8/54; inhibiting corrosion in general C23F) [3, 6, 2006.01]
E21B 41/04UGR1
.Manipulators for underwater operations, e.g. temporarily connected to well heads (manipulators in general B25J) [3]
E21B 41/06UGR1
.Work chambers for underwater operations, e.g. temporarily connected to well heads (in general B63C 11/00) [3]
E21B 41/08UGR1
.Underwater guide bases, e.g. drilling templates; Levelling thereof [7]
E21B 41/10UGR1
.Guide posts, e.g. releasable; Attaching guide lines to underwater guide bases [7]
E21B 43/00ZWObtaining fluids from wells [3]
E21B 43/00HGRMethods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (applicable only to water E03B; obtaining oil-bearing deposits or soluble or meltable materials by mining techniques E21C 41/00; pumps F04)
E21B 43/01UGR1
.specially adapted for obtaining from underwater installations (underwater well heads E21B 33/035)
E21B 43/013UGR2
. .Connecting a production flow line to an underwater well head [3]
E21B 43/017UGR2
. .Production satellite stations, i.e. underwater installations comprising a plurality of satellite well heads connected to a central station (underwater separating arrangements E21B 43/36) [3]
E21B 43/02UGR1
.Subsoil filtering (E21B 43/11 takes precedence; chemical compositions for consolidating loose sand or the like around wells C09K 8/56) [1, 2006.01]
E21B 43/04UGR2
. .Gravelling of wells
E21B 43/08UGR2
. .Screens or liners
E21B 43/10UGR2
. .Setting of casings, screens or liners in wells (driving or forcing casings into boreholes, simultaneously drilling and casing boreholes E21B 7/20; setting of tools, packers or the like E21B 23/00; suspending casings in well heads E21B 33/04)
E21B 43/11UGR1
.Perforators; Permeators
E21B 43/112UGR2
. .Perforators with extendable perforating members, e.g. actuated by fluid means
E21B 43/114UGR2
. .Perforators using direct fluid action, e.g. abrasive jets
E21B 43/116UGR2
. .Gun or shaped-charge perforators
E21B 43/117UGR3
. . .Shaped-charge perforators (E21B 43/118 takes precedence)
E21B 43/118UGR3
. . .characterised by lowering in vertical position and subsequent tilting to operating position
E21B 43/1185UGR3
. . .Ignition systems [3]
E21B 43/119UGR2
. .Details, e.g. for locating perforating place or direction
E21B 43/12UGR1
.Methods or apparatus for controlling the flow of the obtained fluid to or in wells (E21B 43/25 takes precedence; valve arrangements E21B 34/00)
E21B 43/14UGR1
.Obtaining from a multiple-zone well
E21B 43/16UGR1
.Enhanced recovery methods for obtaining hydrocarbons (fracturing E21B 43/26; obtaining slurry E21B 43/29; reclamation of contaminated soil in situB09C)
E21B 43/17UGR2
. .Interconnecting two or more wells by fracturing or otherwise attacking the formation (E21B 43/247 takes precedence) [3]
E21B 43/18UGR2
. .Repressuring or vacuum methods
E21B 43/20UGR2
. .Displacing by water
E21B 43/22UGR2
. .Use of chemicals or bacterial activity (E21B 43/27 takes precedence; chemical or bacterial compositions therefor C09K 8/58; chemical features in extracting oils from oil sands or shales C10G) [1, 2006.01]
E21B 43/24UGR2
. .using heat, e.g. steam injection (heating, cooling or insulating wells E21B 36/00)
E21B 43/241UGR3
. . .combined with solution mining of non-hydrocarbon minerals, e.g. solvent pyrolysis of oil shale [5]
E21B 43/243UGR3
. . .Combustion in situ [3]
E21B 43/247UGR4
. . . .in association with fracturing processes [3]
E21B 43/248UGR5
. . . . .using explosives [5]
E21B 43/25UGR1
.Methods for stimulating production (dump bailers E21B 27/02; vibration generating arrangements E21B 28/00; chemical compositions therefor C09K 8/60) [1, 2006.01]
E21B 43/26UGR2
. .by forming crevices or fractures
E21B 43/263UGR3
. . .using explosives [3]
E21B 43/267UGR3
. . .reinforcing fractures by propping [3]
E21B 43/27UGR3
. . .by use of eroding chemicals, e.g. acids
E21B 43/28UGR1
.Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent (E21B 43/241 takes precedence) [5]
E21B 43/285UGR1
.Melting minerals, e.g. sulfur (E21B 43/24 takes precedence; heating, cooling or insulating arrangements for wells E21B 36/00) [5]
E21B 43/29UGR1
.Obtaining a slurry of minerals, e.g. by using nozzles [5]
E21B 43/295UGR1
.Gasification of minerals, e.g. for producing mixtures of combustible gases (E21B 43/243 takes precedence) [5]
E21B 43/30UGR1
.Specific pattern of wells, e.g. optimizing the spacing of wells (production satellite stations E21B 43/017) [3]
E21B 43/32UGR1
.Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells [3]
E21B 43/34UGR1
.Arrangements for separating materials produced by the well (separating apparatus per se, see the relevant subclasses) [3]
E21B 43/36UGR2
. .Underwater separating arrangements (E21B 43/38 takes precedence) [3]
E21B 43/38UGR2
. .in the well [3]
E21B 43/40UGR2
. .Separation associated with re-injection of separated materials [3]
E21B 44/00ZWAutomatic control; Surveying or testing [3]
E21B 44/00HGRAutomatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems (for non-automatic drilling control, see the operation controlled; automatic feeding from rack and connecting of drilling pipes E21B 19/20; controlling pressure or flow of drilling fluid E21B 21/08); Systems specially adapted for monitoring a plurality of drilling variables or conditions (means for transmitting measuring-signals from the well to the surface E21B 47/12) [3]
E21B 44/02UGR1
.Automatic control of the tool feed (E21B 44/10 takes precedence) [7]
E21B 44/04UGR2
. .in response to the torque of the drive [7]
E21B 44/06UGR2
. .in response to the flow or pressure of the motive fluid of the drive [7]
E21B 44/08UGR2
. .in response to the amplitude of the movement of the percussion tool, e.g. jump or recoil [7]
E21B 44/10UGR1
.Arrangements for automatic stopping when the tool is lifted from the working face [7]
E21B 45/00ZWSurveying or testing
E21B 45/00HGRMeasuring the drilling time or rate of penetration
E21B 47/00HGRSurvey of boreholes or wells (monitoring pressure or flow of drilling fluid E21B 21/08; geophysical logging G01V)
E21B 47/01UGR1
.Devices for supporting measuring instruments on a drill pipe, rod or wireline (setting or locking tools in boreholes or wells E21B 23/00); Protecting measuring instruments in boreholes against heat, shock, pressure or the like [6]
E21B 47/02UGR1
.Determining slope or direction (clinometers or direction meters G01C)
E21B 47/022UGR2
. .of the borehole
E21B 47/024UGR2
. .of devices in the borehole (E21B 47/022 takes precedence)
E21B 47/026UGR2
. .of penetrated ground layers (apparatus for obtaining oriented cores E21B 25/16; formation testing E21B 49/00)
E21B 47/04UGR1
.Measuring depth or liquid level (measuring liquid level in general G01F)
E21B 47/06UGR1
.Measuring temperature or pressure (measuring temperature in general G01K; measuring pressure in general G01L)
E21B 47/08UGR1
.Measuring diameter (measuring diameter in general G01B)
E21B 47/09UGR1
.Locating or determining the position of objects in boreholes or wells; Identifying the free or blocked portions of pipes (measuring depth E21B 47/04; measuring diameter E21B 47/08) [3]
E21B 47/10UGR1
.Locating fluid leaks, intrusions, or movements
E21B 47/12UGR1
.Means for transmitting measuring-signals from the well to the surface, e.g. for logging while drilling (remote signalling in general G08)
E21B 47/14UGR2
. .using acoustic waves [6]
E21B 47/16UGR3
. . .through the drill string or casing [6]
E21B 47/18UGR3
. . .through the well fluid [6]
E21B 49/00HGRTesting the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells (sampling in general G01N 1/00)
E21B 49/02UGR1
.by mechanically taking samples of the soil (apparatus for obtaining undisturbed cores E21B 25/00; investigation of foundation soil in situE02D 1/00)
E21B 49/04UGR2
. .using explosives in boreholes; using projectiles penetrating the wall [3]
E21B 49/06UGR2
. .using side-wall drilling tools or scrapers
E21B 49/08UGR1
.Obtaining fluid samples or testing fluids, in boreholes or wells [3]
E21B 49/10UGR2
. .using side-wall fluid samplers or testers [3]