| 摘要 |
<p>A method and equipment for an instrumented tubular joint apparatus for use in a pipe string comprising an upper tubular section with a threaded connection thereabove and an axial passage for fluid to flow through connected to a lower tubular section with a threaded connection therebelow and an axial passage for fluid to flow through, a sensor to measure strain at the instrumented tubular joint, a data recording and transmitting unit operatively connected to the sensor, means to relate the data acquired by the sensor to a surface processing unit; and a mechanism to disconnect the upper section from the lower section after receiving a signal from the surface processing unit. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. A method and equipment for an instrumented tubular joint apparatus for use in a pipe string comprising an upper tubular section with a threaded connection thereabove and an axial passage for fluid to flow through connected to a lower tubular section with a threaded connection therebelow and an axial passage for fluid to flow through, a sensor to measure strain at the instrumented tubular joint, a data recording and transmitting unit operatively connected to the sensor, means to relate the data acquired by the sensor to a surface processing unit; and a mechanism to disconnect the upper section from the lower section after receiving a signal from the surface processing unit. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. The invention provides drill bits and methods of drilling curved boreholes. One aspect of the invention provides a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths. Another aspect of the invention provides a method for drilling a curved borehole. The method includes: providing a drill string including a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths; rotating the drill string; and selectively actuating the one or more blades to a plurality of cut depths; thereby drilling a curved borehole.</p> |
