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Class Information
Number: 166
Name: Wells >
Description: This class relates to processes or means not otherwise classified comprising (1) shafts or deep borings in the earth, commonly known as wells, for the extraction of fluids from the earth, (2) shafts or deep borings in the earth for inserting a fluid into the interstices of a porous earth formation, usually to enable withdrawal of fluid from a producing output well, (3) apparatus peculiarly adapted for treating a well or for use in or with a well, or (4) processes of using, making, or treating a well.










Class Number Class Name No. of Patents
166/75.11

Above ground apparatus

139
166/79.1

Cap having transporting means or ground support

32
166/92.1

Cap or head pivotably attached to tube or casing

32
166/95.1

Central valve or closure and lateral port

91
166/96.1

External anchoring or bracing means

43
166/81.1

Fluid catcher around pipe coupling

68
166/80.1

Having retractable pipe section to allow closing of gate type valve or flapper valve for rod or pipe

22
166/76.1

Having structure for converting from one mode of operation to another; e.g., valve to packer

14
166/88.1

Inner member anchor or seal with lateral port

85
166/89.1

Plural inner pipes

53
166/89.3

Having slip type hanger

16
166/89.2

Parallel pipes (as opposed to concentric)

19
166/88.2

Slip type well anchor

33
166/88.3

Seal actuated with anchor

22
166/88.4

With hydraulic conduit or line extending through outer member

94
166/86.1

Inner member anchor or seal with valve

47
166/86.2

Annular sealing type valve

30
166/87.1

Axially movable type valve

29
166/86.3

Gate type (perpendicular to pipe) valve

29
166/94.1

Laterally adjustable cap or head

9
166/77.1

Moving tubing or cable into an existing well

242
166/77.2

Coiled tubing

221
166/77.3

Chain injector

86
166/77.4

Piston and cylinder

72
166/97.5

Parallel pipes extending along distinct paths through wellhead

56
166/82.1

Releasable seal or cleaner disengaged by projection on inner member

30
166/83.1

Latches releasable radially inward

6
166/93.1

Split cap or head

26
166/75.14

Suspension means

161
166/75.12

Treatment of produced fluids

142
166/75.13

Well caps or casing heads

131
166/85.1

With assembly or disassembly means (e.g., handling, guiding, or tool feature)

258
166/85.5

Guiding or aligning feature

152
166/85.2

Pitless well adapters

28
166/85.3

Seal or bushing insertion or removal

63
166/85.4

With blowout preventer

173
166/91.1

With flow restrictions (e.g., chokes or beans)

72
166/77.51

With means facilitating connecting or disconnecting supported tubing or rod sections

303
166/77.53

Upper and lower slips

83
166/77.52

With elevator detail

122
166/75.15

With means for injecting solid or particulate material into the well

108
166/90.1

With means for inserting fluid into well

287
166/84.1

With seal for reciprocating member

119
166/84.2

Cooling fluid or grease supplied to seals

39
166/84.4

Fluid pressure actuated seals

69
166/84.3

Rotary blowout preventer type

99
166/84.5

Seal fixedly mounted to rod

15
166/78.1

With tube rotating means (rotary tables)

95
166/97.1

With valve on cap or head

94
166/177.7

Agitator

32
166/53

Automatic

455
166/54

Float controlled valve

29
166/170

Brushing, scraping, cutting or punching-type cleaners

70
166/172

Bow spring type

12
166/176

On sucker rod

33
166/173

On tubing or casing

128
166/171

Perforation cleaners

12
166/175

Reciprocable relative to central member extending from well top

20
166/174

Retractable on support while lowering

30
166/177.4

Cementing device

212
166/115

Central chamber sealed with respect to prepositioned modified surrounding conduit

94
166/116

Surrounding conduit carries packer or plug

30
166/114

Central member with pre-set packer or plug in same conduit

16
166/113

Combined (e.g., with non-electrical indicating)

127
166/242.1

Conduit wall or specific conduit end structure

283
166/242.9

Brick or cement casing liner

4
166/242.4

Corrosion prevention or deterring

34
166/242.6

Downhole coupling or connector

360
166/242.7

Telescopic

110
166/242.2

Flexible tube or cable

121
166/242.3

Plural, parallel, nonconcentric conduits

97
166/242.8

Shoe detail

71
166/242.5

Side entry

58
166/102

Convertible

16
166/237

Detents or clutches

183
166/238

Flow permitting means bridging fluid conduit

15
166/240

Lug in closed branched slot

108
166/239

Operated by dropped weight

11
166/206

Expansible anchor or casing

192
166/213

Bowed anchor means

22
166/207

Expansible casing

557
166/217

Expansible means translated by wedge or cam

383
166/212

Fluid pressure actuated

286
166/208

Liner hanger

352
166/209

Set by wedge or cam at any point by drop only (e.g., tubing catcher)

18
166/210

With friction drag for setting by turning movement also

12
166/211

With spring

9
166/214

Spring set

70
166/215

Spring moves anchor slip relative to wedge or cam

29
166/216

With wedge or cam and friction drag

124
166/902

For inhibiting corrosion or coating

257
166/98

Grapple and well anchored lifting means

111
166/241.1

Guide for device or conduit

125
166/241.5

For a wireline operation

70
166/241.2

On sucker or pump rod

23
166/241.3

Rotatable or having a rotatable element

49
166/241.4

Surrounding existing rod

56
166/241.6

Surrounding existing device or tubing

190
166/241.7

Removably secured by a fastener (e.g., pin) parallel to tubing

65
166/177.5

Hydraulic fracturing device

152
166/100

Lateral probe or port sealed against well wall

150
166/117.7

Means anchored against rotation in one conduit section for relatively rotating another section

50
166/54.5

Means for cutting cable or rope below ground

36
166/54.6

Cutting means actuated by contacting element suspended in well by cable or rope

13
166/51

Means for forming filter beds (e.g., gravel placing)

435
166/117.5

Means for guiding insertable element laterally of well axis (e.g., whipstock)

311
166/117.6

Secured in operative position by movable means engaging well conduit (e.g., anchor)

311
166/55

Means for perforating, weakening, bending or separating pipe at an unprepared point

399
166/55.6

Cutter rotates circumferentially of pipe

47
166/55.7

Internal

146
166/55.8

Tool moved radially by fluid pressure

78
166/55.2

Perforating or splitting cutter

124
166/55.3

Wedge or cam actuated

43
166/55.1

With disparate below ground feature

346
166/243

Miscellaneous (e.g., anchor pipes)

94
166/101

Packer or plug and pump or plunger means exerting outward pressure

23
166/179

Packers or plugs

167
166/180

Adjustable over pipe or set over prepositioned pipe

30
166/196

Central support has shoulders expanding sealing portion, or telescopes

136
166/188

Controllable passage through packer

114
166/202

Cup type

111
166/195

Deformable portion engages conduit restriction

67
166/187

Expanded by confined fluid from central chamber, pump or plunger

421
166/192

Flow stopping type; e.g., plug

185
166/193

Free falling type (e.g., dropped ball)

58
166/194

With sleeve valve

55
166/189

For non-concentric members

24
166/203

Non-deformable type

14
166/141

Sealing portion closes port between central pipe and outside space when unexpanded

12
166/191

Spaced sealing portions

232
166/185

With central conduit and fluid port to space outside

52
166/186

Port between sealing portions and bypass around

46
166/183

With controllable bypass outside central conduit

38
166/142

With controllable passage between central chamber and space below packer

48
166/145

Bypass closing and passage opening to upward flow constrained to occur simultaneously

11
166/143

Central conduit detachable

12
166/144

Bottom supported casing or screen section

7
166/146

Passage connects with space below packers and continuously open passageway connects with space between packers

4
166/147

Passage connects with space between packer or plug seals

38
166/152

Passage controllable by movement of central chamber

25
166/148

Upwardly biased check valve and means for opening or bypassing it

15
166/149

With passageway between central chamber and space above packer

6
166/150

Passageway controllable by movement of central chamber

15
166/151

Passageway valve directly responsive to fluid pressure

26
166/184

With controllable passage between central conduit and space above packer or plug

46
166/181

With detachable setting means

86
166/182

Packer or plug locked expanded

106
166/118

With expanding anchor

123
166/120

Anchor actuated by fluid pressure

243
166/121

Pressure transmitted by cup type packer or plug seal

11
166/122

Pressure transmitted by packer or plug expanded by confined fluid from central chamber, pump, or plunger

62
166/135

Flow stopping type, e.g., plug

107
166/132

Portion extends beyond end of surrounding conduit

1
166/119

Relatively movable packers or plugs

31
166/136

Spring set anchor

26
166/137

Spring moves anchor slip relative to wedge or cam

20
166/134

Support and holddown expanding anchors

222
166/138

Wedge or cam and friction drag

88
166/140

Anchor above packer or plug seal

31
166/139

Threaded element rotated

26
166/129

With controllable bypass outside central conduit

55
166/130

Packer expanded by upper valve

4
166/126

With controllable passage between central chamber and space below packer

35
166/128

Passage controllable by movement of central chamber

29
166/127

Spaced packer or plug seals

35
166/131

With controllable passage between central conduit and space above packer or plug

38
166/133

With controllable passage through packer

90
166/123

With detachable setting means

169
166/125

Radially movable latch

90
166/124

Screw threaded

47
166/153

Pistons, fluid driven into well (e.g., cementing plugs)

142
166/154

Surrounding conduit valve or closure opened by piston

57
166/155

With downflow past piston

66
166/156

With stop

85
166/52

Plural wells

167
 

Processes (166/244.1)

 
166/244.1

Processes

98
166/378

Assembling well part

182
166/379

Above ground parts

337
166/380

Conduit

769
166/285

Cementing, plugging or consolidating

569
166/290

By tubing which is subsequently lifted

67
166/289

Discharging cement from casing at different levels

61
166/288

Including heating

142
166/287

Removable molding or forming means

31
166/286

Tamping, vibrating, exploding or using receptacle

75
166/292

Using specific materials

657
166/293

Cement or consolidating material contains inorganic water settable and organic ingredients

697
166/294

Cement or consolidating material is organic or has organic ingredient

544
166/295

Organic material is resin or resinous

920
166/291

With piston separator

264
166/300

Chemical inter-reaction of two or more introduced materials (e.g., selective plugging or surfactant)

1099
166/311

Cleaning or unloading well

404
166/312

Liquid introduced from well top

582
166/263

Cyclic injection then production of a single well

176
166/376

Destroying or dissolving well part

227
166/377

Disassembling well part

246
166/304

Dissolving or preventing formation of solid oil deposit

244
166/268

Distinct, separate injection and producing wells

291
166/269

Fluid injected from longitudinally spaced locations in injection well

87
166/271

Including fracturing or attacking formation

235
166/275

Injected fluid comprises water and material other than inorganic gas

528
166/270.1

Injecting a composition including a surfactant or cosurfactant

463
166/270.2

Nonaqueous type

36
166/270

Injecting a composition to adjust the permeability (e.g., selective plugging)

280
166/272.1

Involving the step of heating

313
166/272.7

Horizontal well

113
166/272.2

In association with fracturing or crevice forming processes

59
166/272.6

Liquid material injected

95
166/272.3

Steam as drive fluid

431
166/272.4

In combination with alkyls or carbon chains

48
166/272.5

With override zone, diverting, or path blocking operation

32
166/400

Sequentially injected separate fluids (e.g., slugs)

192
166/401

Injecting a gas or gas mixture

163
166/402

Co2 or carbonated gas

181
166/403

In combination with additional organic material (e.g., alkyls, carbon chains)

54
166/248

Electric current or electrical wave energy through earth for treating

278
166/310

Entraining or incorporating treating material in flowing earth fluid

271
166/284

Fluid flow causes pellet to block opening in wall of conduit

57
166/301

Freeing stuck object, grappling or fishing in well

249
166/278

Graveling or filter forming

745
166/302

Heating, cooling or insulating

758
166/303

Placing preheated fluid into formation

445
166/256

In situ combustion

140
166/259

Including fracturing or attacking formation

225
166/260

Injecting specific fuel or catalyst for burning into formation

78
166/261

Injecting specific material other than oxygen into formation

287
166/257

Injecting while producing by in situ combustion from same well

65
166/258

Plural distinct superimposed formations

32
166/262

Solid fuel or particles in well

23
166/279

Material placed in pores of formation to treat resident fluid flowing into well

297
166/247

Nuclear energy or radioactivity for treating

42
166/373

Operating valve, closure, or changeable restrictor in a well

649
166/374

Operated by fluid pressure controlled above ground

243
166/375

By auxilliary fluid control line

180
166/313

Parallel string or multiple completion well

457
166/297

Perforating, weakening, bending or separating pipe at an unprepared point

667
166/298

Perforating, weakening or separating by mechanical means or abrasive fluid

341
166/305.1

Placing fluid into the formation

1138
166/307

Attacking formation

533
166/306

Fluid enters and leaves well at spaced zones

128
166/308.1

Fracturing (epo)

747
166/308.2

Using a chemical (epo)

313
166/308.6

Foam (epo)

91
166/308.5

Including cross-linking agent (epo)

224
166/308.4

Oil based composition (epo)

74
166/308.3

Water based composition with inorganic material (epo)

164
166/381

Placing or shifting well part

449
166/383

By fluid driven piston

193
166/385

Flexible cable or wire

306
166/386

Fluid flow control member (e.g., plug or valve)

801
166/382

Providing support for well part (e.g., hanger or anchor)

749
166/384

With bending of tubing

369
166/387

With sealing feature (e.g., packer)

963
166/296

Preventing flow into strainer while lowering by blocking openings

57
166/309

Producing foam or gas in well by foaming or gas producing material

272
166/369

Producing the well

559
166/372

By fluid lift

428
166/371

Including non-expulsive material placed in well

191
166/370

Including varying downhole pressure

269
166/276

Providing porous mass of adhered filter material in well

204
166/277

Repairing object in well

206
166/264

Sampling well fluid

441
166/281

Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking formation

354
166/265

Separating material entering well

272
166/266

Injection and producing wells

295
166/267

Separating outside of well

636
166/282

Specific low fluid loss feature for fluid attacking formation

110
166/283

Specific low fluid loss feature for fracturing fluid or cement causes fracture

173
166/245

Specific pattern of plural wells

389
166/280.1

Specific propping feature (epo)

313
166/280.2

Composition of proppant (epo)

276
166/246

Using microorganisms

230
166/249

Vibrating the earth or material in or being placed in the earth pores

172
166/299

With explosion or breaking container to implode

205
166/250.01

With indicating, testing, measuring or locating

831
166/250.15

Automatic control for production

254
166/250.07

Bottom hole pressure

148
166/250.03

Determining fluid interface or fluid level

86
166/254.1

Determining position of earth zone or marker

70
166/254.2

Well logging

209
166/255.1

Determining position of object in well

154
166/255.2

Tool orienting

114
166/255.3

Using whipstock

27
166/250.13

Determining stuck point

18
166/250.1

Fracturing characteristic

213
166/250.11

Holder for coupon or sensor

82
166/250.09

Impression means

25
166/251.1

Including in situ combustion

60
166/252.1

Including production of earth fluid by driving fluid

107
166/252.6

And tracing material

35
166/252.4

Flood front

17
166/252.5

Permeability or viscosity

31
166/252.2

Residual oil or oil saturation

31
166/252.3

Salinity or acidity

27
166/250.17

Including testing or treating tool having at least one actuatable packer

150
166/253.1

Indicating the location, presence, or absence of cement

46
166/250.08

Leak testing or locating

83
166/250.14

Of cementing or plugging technique

76
166/250.02

Permeability determining

85
166/250.04

Plug indicating or releasing

18
166/250.16

Prospecting

51
166/250.05

Scale or corrosion determination

20
166/250.06

Steam quality

10
166/250.12

Tracer

70
166/117

Receptacle or part thereof left in well

31
166/162

Receptacles

75
166/167

Bottom receiving and side discharge valves

26
166/169

Lateral ports used in well

107
166/168

Readily releasable bottom valve

21
166/166

Valve control means contacting well conduit wall

11
166/164

With destroyable closure and valve

18
166/163

With separate air chamber having openable passage

20
166/165

With valved or closed top

26
166/56

Screen and outside cleaning pipe

10
166/205

Screen with valve, closure, changeable restrictor or portion removable in well

123
166/157

Screen with washing point or shoe

21
166/158

Detachable wash pipe

10
166/227

Screens

250
166/236

Concentric pipes

151
166/229

Inserted screen plug

30
166/228

Porous material

95
166/231

Spiral

51
166/233

With perforated pipe

97
166/232

With spacing lug for adjacent turns

12
166/235

Stacked annular sections

46
166/234

Strip or rod

27
166/230

Woven mesh

57
166/177.1

Sonic device

65
166/177.2

With specific downhole feature

66
166/335

Submerged well

84
166/338

Connection or disconnection of submerged members remotely controlled

211
166/349

Connection of guide means

62
166/348

Connection of pipe hanging

204
166/344

Connection to provide fluid flow path

319
166/347

Connection of lateral flow line

110
166/345

Connection of riser-and-tubing assembly to other structure

224
166/346

Yieldable tubing

40
166/340

Disconnection

97
166/341

With orienting or aligning of member for connection

251
166/343

Including means to pull member into position

101
166/342

Including removable, member mounted guide

51
166/339

With provision for removal or repositioning of member without removal of other well structure

206
166/364

Including disaster feature

104
166/351

Means removably connected to permanent well structure

112
166/358

Drilling means

136
166/356

Means to provide protective environment for operative access below surface of water

97
166/361

Pipe cutting means

57
166/359

Removable riser

176
166/357

Separator

140
166/352

Surface vessel

168
166/354

Having means to hold vessel at given location (e.g., anchor, etc.)

35
166/353

Having means to move vessel to precise location

20
166/355

With means to compensate for vessel movement

230
166/360

Well component assembly means

120
166/366

Multiple wells

152
166/367

Riser

413
166/350

Submerged, buoyant wellhead or riser

221
166/336

Testing

119
166/337

For leak

49
166/368

Wellhead

475
166/365

With provision for disassembly

80
166/363

With safety or emergency shutoff

148
166/316

Valves, closures or changeable restrictors

126
166/317

Destructible element

300
166/319

Fluid operated

416
166/321

Fluid pressure biased to open position position

425
166/323

Locked open or closed

182
166/322

Retrievable

127
166/324

With fluid pressure equalizing means

195
166/329

Loose ball closure with limited reverse flow

24
166/325

One way, e.g., check valve type

205
166/326

Flexible valve element

35
166/327

Shoes with check valve

53
166/328

Loose ball closure

36
166/320

Variably opened

142
166/332.1

Longitudinally movable operator

181
166/333.1

Contact with bore bottom

12
166/332.8

Flapper type

201
166/332.6

Having a dump or discharge type means

7
166/332.7

Having equalizing valve

45
166/332.2

Having rotational movement

40
166/332.3

Ball valve type

64
166/332.4

Operated by means inserted from the surface

149
166/332.5

Valving means inserted or retrieved to operate

46
166/334.1

Vertical movement of conduit

100
166/334.2

And rotational movement; e.g., ball valve-type

38
166/334.3

Drain-type

5
166/334.4

Fluid flow through lateral port to exterior

170
166/318

Operated by dropped element

216
166/330

Rotated operator

70
166/331

Lug in branched slot, e.g., "j" slot

76
166/177.6

Vibrator

73
166/901

Wells in frozen terrain

41
166/50

Wells with lateral conduits

781
166/222

Whirling or lateral discharge or projectable nozzles

136
166/223

Rotary or projectable

72
166/177.3

Wiper

52
166/67

With below and above ground modification

61
166/72

Above ground actuating means for below ground device

211
166/73

Tubing or casing actuated

41
166/68

Eduction pump or plunger in well

369
166/68.5

With above ground (1) motor carried by casing or casing support or (2) well fluid pump

190
166/70

Head for tool, piston or cleaner (e.g., cement head)

135
166/71

With above ground casing sinking means

6
166/74

With below ground screen

21
166/69

With receptacle for insertion into well

28
166/105

With eduction pump or plunger

474
166/105.5

Having liquid-gas separator

222
166/105.6

Gas fed to entrainment type pump

26
166/105.1

Having sediment trap or deflector

60
166/105.2

Carried by reciprocating plunger or plunger rod

33
166/105.4

In pump discharge flow path

20
166/105.3

Sediment trap formed in pumping chamber

27
166/107

Receptacles

56
166/111

Bail engaging piston rod

1
166/110

Lateral port always below piston and used in well

15
166/108

Piston actuates foot valve

24
166/109

Telescoping

16
166/112

With leak means

13
166/106

With packer or plug

239
166/65.1

With electrical means

653
166/66.4

Electrical motor (e.g., solenoid actuator)

203
166/66

Indicating

569
166/66.5

Magnetic

234
166/66.6

Valve

129
166/66.7

Longitudinally movable operator

114
166/63

With explosive or gas generating means in well

231
166/57

With heating, refrigerating or heat insulating means

337
166/59

Burner in well

124
166/60

Electrical heater in well

276
166/58

Fuel supply or hot billet in well

27
166/61

Heater surrounding production tube

42
166/62

With eduction pump or plunger in well

46
166/178

With jar means for releasing stuck part

182
166/99

With junk retrieving means

104
166/54.1

With means for separately pumping from plural sources in well

38
166/104

With motor for rotary or oscillating motion

46
166/64

With time or distance measuring, temperature responsive or counting means

208
 
 
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