Processes Patents (Class 166/244.1)
- Including in situ combustion (Class 166/251.1)
- Including production of earth fluid by driving fluid (Class 166/252.1)
- Indicating the location, presence, or absence of cement (Class 166/253.1)
- Determining position of earth zone or marker (Class 166/254.1)
- Determining position of object in well (Class 166/255.1)
- Permeability determining (Class 166/250.02)
- Determining fluid interface or fluid level (Class 166/250.03)
- Plug indicating or releasing (Class 166/250.04)
- Scale or corrosion determination (Class 166/250.05)
- Steam quality (Class 166/250.06)
- Bottom hole pressure (Class 166/250.07)
- Leak testing or locating (Class 166/250.08)
- Impression means (Class 166/250.09)
- Fracturing characteristic (Class 166/250.1)
- Holder for coupon or sensor (Class 166/250.11)
- Tracer (Class 166/250.12)
- Determining stuck point (Class 166/250.13)
- Of cementing or plugging technique (Class 166/250.14)
- Automatic control for production (Class 166/250.15)
- Prospecting (Class 166/250.16)
- Including testing or treating tool having at least one actuatable packer (Class 166/250.17)
- Injecting while producing by in situ combustion from same well (Class 166/257)
- Plural distinct superimposed formations (Class 166/258)
- Including fracturing or attacking formation (Class 166/259)
- Injecting specific fuel or catalyst for burning into formation (Class 166/260)
- Injecting specific material other than oxygen into formation (Class 166/261)
- Solid fuel or particles in well (Class 166/262)
- Injecting a composition to adjust the permeability (e.g., selective plugging) (Class 166/270)
- Injecting a composition including a surfactant or cosurfactant (Class 166/270.1)
- Sequentially injected separate fluids (e.g., slugs) (Class 166/400)
- Involving the step of heating (Class 166/272.1)
- Including fracturing or attacking formation (Class 166/271)
- Fluid injected from longitudinally spaced locations in injection well (Class 166/269)
- Injected fluid comprises water and material other than inorganic gas (Class 166/275)
- Tamping, vibrating, exploding or using receptacle (Class 166/286)
- Removable molding or forming means (Class 166/287)
- Including heating (Class 166/288)
- Discharging cement from casing at different levels (Class 166/289)
- By tubing which is subsequently lifted (Class 166/290)
- With piston separator (Class 166/291)
- Using specific materials (Class 166/292)
- Providing support for well part (e.g., hanger or anchor) (Class 166/382)
- By fluid driven piston (Class 166/383)
- With bending of tubing (Class 166/384)
- Flexible cable or wire (Class 166/385)
- Fluid flow control member (e.g., plug or valve) (Class 166/386)
- With sealing feature (e.g., packer) (Class 166/387)