(under the class definition) Devices combined with means for other functions than operating, treating or making a well or a means for perfecting the functions of operating, treating or making a well, the said means not being provided for in preceding subclasses.
(1) Note. Operating, treating or making a well is considered to include, for example, flowing, washing, acidizing, cementing, and connecting or disconnecting parts in a well. Ancillary subcombination of such devices such as pumps for forcing fluid into a well or inflating a packer, clutches, detents, knives or release detents or open closures, means attachable or detachable in the well, bearings or jars are not considered subject matter for this subclass. Devices including these means having been classified in appropriate subclasses according to the features claimed.
(2) Note. Devices found in this subclass include for example, cementing plugs with an indicating flare fluid, a well plug with an indicating ball on a string, a bailer with a means for taking an impression of lost tools, a washing device with a camera, and cementing casing shoes with means for testing the casing for fluid tightness.
(3) Note. While well devices with added special means for testing for fluid leakage are included, well devices such as packers or plugs which inherently are capable of use as fluid leakage testers without modification are not found in this subclass but are classified according to other features.
(4) Note. It is common in the art and inherent in most devices to give an indication of the operation of some part by manipulating a flow controlling means so as to cause a change in pressure. Devices for giving an indication by a change in pressure are not included unless some indicia means are claimed, such as a gauge, scale or pointer.
(5) Note. Many well devices inherently give an indication of their position, as when expanding anchor means catch on conduit joints, when they are manipulated to operate valves or when detent or clutch means are operated. Well devices adapted to indicate an operation by means such as the position of parts or resistance to motion are not included in this subclass unless an indicia means such as a scale or pointer is included. SEE OR SEARCH CLASS
33, Geometrical Instruments,
304+, for means sensing and indicating borehole direction or inclination.
73, Measuring and Testing,
152.01+, for apparatus for bore hole studies. Such apparatus may include a sampling device or other well devices such as packers in combination with means for bore hole study such as flow meters, temperature recorders, well pressure indicators, etc., the well devices being used to perfect the bore hole study means rather than being used for well functions such as treating the well.
175, Boring or Penetrating the Earth,
40+, for processes or apparatus for earth boring including signaling, indicating, testing or measuring.
374, Thermal Measuring and Testing,
136, for subsurface temperature measurement, in general.
