Class   507	EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY
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This Class 507 is considered to be an integral part of Class 252 (see the Class 252 schedule for the position of this Class in schedule hierarchy). This Class retains all pertinent definitions and class lines of Class 252.

90

PREVENTING CONTAMINANT DEPOSITS IN PETROLEUM OIL CONDUITS

100

EARTH BORING

101

. (1 indent ) Contains enzyme or living microorganism

102

. (1 indent ) Contains intended gaseous phase at entry into wellbore

103

. (1 indent ) Contains organic component

104

.. (2 indent ) Organic component is cellular or fibrous material derived from plant or animal source (e.g., wood, nutshell, paper, leather, cotton, etc.)

105

.. (2 indent ) Organic component contains fluorine bonded directly to carbon

106

.. (2 indent ) Organic component is lignin or humate or derivative thereof (e.g., tannin, quebracho extract, etc.)

107

... (3 indent ) Humate component is fossilized (e.g., lignite, leonardite, brown coal, etc.)

108

... (3 indent ) Lignin or humate component contains sulfur or is reacted with substance containing sulfur (e.g., lignosulfonate, etc.)

109

.... (4 indent ) Includes metal compound other than an alkali or alkaline earth metal compound (e.g., Al, Cr, Fe, Mn, Cu, etc.)

110

.. (2 indent ) Organic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, xanthan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbons

111

... (3 indent ) Carbohydrate is starch or derivative thereof

112

... (3 indent ) Carbohydrate is cellulose or derivative thereof

113

.... (4 indent ) Carboxyalkylcellulose (e.g., CMC, CMHEC, etc.)

114

.... (4 indent ) Hydroxyalkylcellulose (e.g., HEC, etc.)

115

... (3 indent ) Carbohydrate is hydroxyalkyl ether derivative (e.g., HPG, etc.)

116

... (3 indent ) Ester is higher fatty or carboxylic acid ester (e.g., sorbitan oleate, etc.)

117

.. (2 indent ) Organic component is solid synthetic resin

118

... (3 indent ) Resin is polymer derived from ethylenic monomers only (e.g., maleic, itaconic, etc.)

119

.... (4 indent ) Polymer derived from acrylic acid monomer or derivative

120

....• (5 indent ) Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.)

121

....•. (6 indent ) Sulfur is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamidoalkane sulfonates, etc.)

122

.... (4 indent ) Sulfur is attached directly or indirectly to the ethylenic monomer by nonionic bonding

123

.... (4 indent ) Hetero nitrogen ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding

124

.... (4 indent ) Polymer contains vinyl alcohol unit

125

.... (4 indent ) Carbocyclic ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding (e.g., styrene, vinyl toluene, etc.)

126

.. (2 indent ) Organic component is asphalt or a component or derivative thereof

127

.. (2 indent ) Organic component contains silicon attached directly or indirectly to carbon by nonionic bonding

128

.. (2 indent ) Organic component contains phosphorous attached directly or indirectly to carbon by nonionic bonding

129

.. (2 indent ) Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding

130

... (3 indent ) Nitrogen is part of a hetero ring

131

... (3 indent ) Oxygen is attached directly or indirectly to carbon by nonionic bonding

132

.... (4 indent ) Organic component contains a nitrogen attached directly to oxygen by nonionic bonding (e.g., nitroaromatic, amineoxide, etc.)

133

.... (4 indent ) Organic component contains an ether linkage

134

.. (2 indent ) Organic component contains sulfur attached directly or indirectly to carbon by nonionic bonding

135

... (3 indent ) Organic component contains a sulfur attached directly to carbon by nonionic bonding (e.g., sulfonate, etc.)

136

.. (2 indent ) Organic component contains ether linkage (e.g., PEG ether, etc.)

137

.. (2 indent ) Organic component contains a carbocyclic group (e.g., cyclic alkyl, aromatic, tall oil, etc.)

138

.. (2 indent ) Organic component is a fat, fatty alcohol, fatty oil, ester-type wax, fatty still residue, or higher fatty acid or salt thereof

139

.. (2 indent ) Organic component contains an alcohol group

140

. (1 indent ) Contains inorganic component other than water or clay

141

.. (2 indent ) Inorganic component contains soluble potassium salt

142

.. (2 indent ) Inorganic component contains phosphorous

143

.. (2 indent ) Inorganic component is elemental metal or alloy

144

.. (2 indent ) Inorganic component is asbestos

145

.. (2 indent ) Inorganic component is soluble in boring medium

200

WELL TREATING

201

. (1 indent ) Contains enzyme or living micro-organism

202

. (1 indent ) Contains intended gaseous phase at entry into wellbore

203

. (1 indent ) Contains organic component

204

.. (2 indent ) Organic component is cellular or fibrous material derived from plant or animal source (e.g., wood, nutshell, paper, leather, cotton, etc.)

205

.. (2 indent ) Organic component contains fluorine bonded directly to carbon

206

.. (2 indent ) Organic component is lignin or humate or derivative thereof (e.g., tannin, quebracho extract, etc.)

207

... (3 indent ) Lignin or humate component contains sulfur or is reacted with substance containing sulfur (e.g., lignosulfonate, etc.)

208

.... (4 indent ) Includes metal compound other than an alkali or alkaline earth metal compound (e.g., Al, Cr, Fe, Mn, Cu, etc.)

209

.. (2 indent ) Organic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbons

210

... (3 indent ) Carbohydrate has been grafted onto solid synthetic resin

211

... (3 indent ) Carbohydrate is polysaccharide

212

.... (4 indent ) Polysaccharide is starch or derivative thereof

213

.... (4 indent ) Polysaccharide is a xanthan (e.g., scleroglucans, etc.)

214

.... (4 indent ) Polysaccharide is cellulose or derivative thereof

215

....• (5 indent ) Carboxyalkylcellulose (e.g., CMC, CMHEC, etc.)

216

....• (5 indent ) Hydroxyalkylcellulose (e.g., HEC, etc.)

217

.... (4 indent ) Polysaccharide is hydroxyalkyl ether derivative (e.g., HPG, etc.)

218

... (3 indent ) Ester is higher fatty or carboxylic acid ester (e.g., sorbitan oleate, etc.)

219

.. (2 indent ) Organic component is solid synthetic resin

220

... (3 indent ) Resin is polymer derived from phenolic and aldehydic monomers

221

... (3 indent ) Resin is polymer derived from ethylenic monomers only (e.g., maleic, itaconic, etc.)

222

.... (4 indent ) Polymer derived from monomer having quaternary ammonium group

223

....• (5 indent ) Nitrogen of the quaternary ammonium group is a member of a hetero ring

224

.... (4 indent ) Polymer derived from acrylic acid monomer or derivative

225

....• (5 indent ) Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.)

226

....•. (6 indent ) Sulfur is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamidoalkane sulfonates, etc.)

227

.... (4 indent ) Sulfur is attached directly or indirectly to the ethylenic monomer by nonionic bonding

228

....• (5 indent ) Monomer contains benzene ring and sulfonate group

229

.... (4 indent ) Hetero nitrogen ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding

230

.... (4 indent ) Polymer contains vinyl alcohol unit

231

.... (4 indent ) Carbocyclic ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding (e.g., styrene, vinyl toluene, etc.)

232

.. (2 indent ) Organic component is asphalt or a component or derivative thereof

233

.. (2 indent ) Organic component contains silicon attached directly or indirectly to carbon by nonionic bonding

234

... (3 indent ) Organic component contains a direct carbon to silicon bond

235

.. (2 indent ) Organic component contains phosphorus attached directly or indirectly to carbon by nonionic bonding

236

... (3 indent ) Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding

237

... (3 indent ) Organic component contains a direct carbon to phosphorous nonionic bond (e.g., phosphonate, etc.)

238

... (3 indent ) Organic component is a phosphate ester

239

.. (2 indent ) Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding

240

... (3 indent ) Organic component is quaternary ammonium salt

241

... (3 indent ) Organic component contains plural carboxylic acid, ester, or salt groups attached directly or indirectly to nitrogen by nonionic bonding

242

... (3 indent ) Nitrogen is part of a hetero ring

243

.... (4 indent ) Plural heteroatoms in the ring

244

... (3 indent ) Oxygen is attached directly or indirectly to carbon by nonionic bonding

245

.... (4 indent ) Organic component contains a nitrogen attached directly to oxygen by nonionic bonding (e.g., nitroaromatic, amineoxide, etc.)

246

.... (4 indent ) Organic component contains an ether linkage

247

... (3 indent ) Sulfur is attached directly or indirectly to carbon by nonionic bonding

248

... (3 indent ) Organic component consists only of carbon, hydrogen, and nitrogen

249

.... (4 indent ) Organic component contains carbon double or triple bonded to nitrogen (e.g., cyano, nitrilo, etc.)

250

.... (4 indent ) Organic component is acyclic

251

....• (5 indent ) Organic component contains plural nitrogen atoms attached directly or indirectly to carbon by nonionic bonding

252

.. (2 indent ) Organic component contains sulfur attached directly or indirectly to carbon by nonionic bonding

253

... (3 indent ) Organic component contains ether linkage (i.e., C-O-C)

254

.... (4 indent ) The sulfur is part of a sulfate group

255

.... (4 indent ) The sulfur is part of a sulfonate group

256

... (3 indent ) Organic component contains a sulfur attached directly to carbon by nonionic bonding

257

.... (4 indent ) Plural alkyls attached directly to the same sulfur atom or to a chain of sulfur atoms by nonionic bonding

258

.... (4 indent ) Alkyl and hydrogen attached directly to the same sulfur atom or to a chain of sulfur atoms by nonionic bonding

259

.... (4 indent ) The sulfur is part of a sulfonate group

260

.. (2 indent ) Organic component is polycarboxylic acid, ester, or salt thereof

261

.. (2 indent ) Organic component contains ether linkage (e.g., PEG ether, etc.)

262

... (3 indent ) Organic component contains a carbocyclic group

263

.. (2 indent ) Organic component contains a carbocyclic group (e.g., cycloaliphatic, aromatic ring, tall oil, etc.)

264

... (3 indent ) Organic component is a phenol

265

.. (2 indent ) Organic component is a fat, fatty alcohol, fatty oil, ester-type wax, fatty still residue, or higher fatty acid or salt thereof

266

.. (2 indent ) Organic component contains an alcohol group

267

.. (2 indent ) Organic component contains carboxylic acid, ester, or salt thereof

268

.. (2 indent ) Organic component contains a carbonyl group (e.g., aldehyde, ketone, etc.)

269

. (1 indent ) Contains inorganic component other than water or clay

270

.. (2 indent ) Inorganic component is elemental metal or alloy

271

.. (2 indent ) Inorganic component contains Ti, Zr, V, Cr, Mn, Fe, or Ni

272

.. (2 indent ) Inorganic component contains copper or zinc

273

.. (2 indent ) Inorganic component contains boron

274

.. (2 indent ) Inorganic component contains phosphorous

275

.. (2 indent ) Inorganic component contains arsenic or antimony

276

.. (2 indent ) Inorganic component contains potassium

277

.. (2 indent ) Inorganic component is soluble in the well treating medium

	CROSS-REFERENCE ART COLLECTIONS

901

ORGANICALLY MODIFIED INORGANIC SOLID

902

CONTROLLED RELEASE AGENT

903

CROSSLINKED RESIN OR POLYMER

904

PROCESS OF MAKING FLUIDS OR ADDITIVES THEREFOR

905

NONTOXIC COMPOSITION

906

SOLID INORGANIC ADDITIVE IN DEFINED PHYSICAL FORM

907

INDICATING MEANS (E.G., DYE, FLUORESCING AGENT, ETC.)

	CROSS-REFERENCE ART COLLECTIONS

910

EARTH BORING FLUID DEVOID OF DISCRETE AQUEOUS PHASE

	CROSS-REFERENCE ART COLLECTIONS

920

BIOCIDAL

921

SPECIFIED BREAKER COMPONENT FOR EMULSION OR GEL

922

FRACTURE FLUID

923

. (1 indent ) Fracture acidizing

924

. (1 indent ) With specified propping feature

925

COMPLETION OR WORKOVER FLUID

926

PACKER FLUID

927

WELL CLEANING FLUID

928

. (1 indent ) Spacing slug or preflush fluid

929

. (1 indent ) Cleaning organic contaminant

930

.. (2 indent ) Organic contaminant is asphaltic

931

.. (2 indent ) Organic contaminant is paraffinic

932

. (1 indent ) Cleaning sulfur deposits

933

ACIDIZING OR FORMATION DESTROYING

934

. (1 indent ) With inhibitor

935

ENHANCED OIL RECOVERY

936

. (1 indent ) Flooding the formation

937

.. (2 indent ) With emulsion

938

... (3 indent ) With microemulsion

939

CORROSION INHIBITOR

940

FREEING STUCK OBJECT FROM WELLBORE

	FOREIGN ART COLLECTIONS

FOR000

CLASS-RELATED FOREIGN DOCUMENTS

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