A Method for High Drilling Speed ​​Rotary Steerable System to Realize High Buildup Rate

Abstract

The invention provides a method for realizing high build-up rate of a high-speed rotary steerable system. The drill assembly used includes a drill bit connected in series, a rotary steerable drill, a lower stabilizer, a curved casing downhole power drill, MWD and upper stabilizer; the method includes the following steps: step 1, assemble the drill string according to the above sequence, and drop it to the bottom of the well; step 2, circulate the drilling mud, and the ground rotary table drives the entire drill assembly to rotate, and the directional drill Rotary steerable directional drilling is carried out as usual; step 3, when the actual build-up rate does not meet the design requirements, the surface turntable stops rotating, so the upper part of the curved-shell downhole motor does not rotate, and the upper part of the curved-shell downhole motor The slide-steering mode is adopted, while the rotary-steering drilling tool at the lower part adopts the rotary-steering mode to drill. The method of the present invention can achieve a higher build-up rate (<18° / 30m) and a higher drilling speed (<400rpm), thereby having a higher mechanical penetration rate.

Description

technical field [0001] The patent of the present invention relates to the directional drilling technology in the field of oil and gas resources, in particular to a method for realizing high build-up rate by a rotary steering system with a high drilling speed. Background technique [0002] Directional drilling is the process of drilling a wellbore in a controlled manner to achieve a desired well trajectory. Directional well drilling often uses motors or rotary steerable systems to control the wellbore trajectory. There are many reasons to steer a well, including avoiding a collision with another well, penetrating a predetermined geological target, intersecting another well for rescue operations, or following a trajectory required for geosteering, among many other possible reasons. [0003] The relatively advanced drilling tool assembly in the prior art includes a drill bit, a rotary steerable drilling tool, a lower stabilizer, a bent-shell downhole motor, a MWD and an upper ...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method for achieving high build-up rate in a high-speed drilling rotary steerable system, so as to overcome the problem in the prior art that the requirements for high drilling speed and high build-up rate cannot be met in the horizontal section

Images