Rotating stabilize
Technical field
The utility model relates to the downhole tool of oil, gas drilling engineering, is specifically related to a kind of drilling rig---rotating stabilize, belongs to International Classification of Patents E21B17/10 " drill string protector " technical field.
Background technology
In the drilling process of oil, natural gas, a certain position of the drill string of being everlasting connects one or several stabilizers, with Controlling Borehole Trajectory.But, existing general stabilizer, resistance is bigger in the drill string rotating process, and particularly big displacement, high-inclination directional well, horizontal well cause the drill string damage because moment of torsion is excessive, even can't carry out drillng operation.
The utility model content
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of simple in structure, and applicability is strong, safe and reliable rotating stabilize.
A kind of rotating stabilize is made up of body, hold-down screw, seal cover, sealing ring, bearing and centralizer.Seal cover is fixed on the body by hold-down screw, and centralizer relies on bearing fixing on body.There is sealing ring to enter bearing on the bearing to prevent drilling fluid, thus the protection bearing.
Rotating stabilize of the present utility model greatly reduces the resistance of drill string, has reduced the centralizer of conventional stabilisers and the moment of torsion that the stratum friction is produced, and has improved the rock breaking capacity of drill bit.Has important role for big gradient extended reach directional well, horizontal well.And it is simple in structure, and applicability is strong, and is safe in utilization, reliable.
Description of drawings
Accompanying drawing is the structural representation of the utility model rotating stabilize.
Among the figure: 1, body, 2, hold-down screw, 3, seal cover, 4, sealing ring, 5, bearing, 6, centralizer.
The specific embodiment
As shown in drawings, the utility model device is made up of body 1, centralizer 6, bearing 5, sealing ring 4, seal cover 3 and hold-down screw 2.Centralizer 6 relies on bearing 5 fixing and rotation on body 1, and sealing ring 4 prevents that drilling fluid from entering bearing 5, thereby the protection bearing increases the service life.
Go into the well when using, rotating stabilize is connected with drill string by the screw thread that body 1 two ends are provided with, because the effect of bearing 5, when drill string rotating, body 1 rotates with drill string, and centralizer 6 contacts the boreholes wall, does not rotate.Drill string only transmits the moment of torsion that the drill bit broken formation is produced, and has reduced the centralizer of conventional stabilisers and the moment of torsion that the stratum friction is produced.The rock breaking efficiency of drill bit and the drilling duty of drill string have been improved.