Drillable self-excited guide
A guiding device and self-excited technology, which is applied to the driving device for drilling in the borehole, drilling equipment, earthwork drilling and production, etc., can solve the problem that the casing cannot be lowered to the expected position, achieve strong cuttings carrying capacity, and improve punching. Sand efficiency, the effect of a wide range of applications
Active Publication Date: 2016-07-06
王殿义
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Problems solved by technology
[0003] In order to overcome the problem that the casing cannot be lowered to the expected position due to the sand sinking at the bottom of the well or the collapse of the well wall in the existing casing operation, the present invention provides a drillable self-excited steering device, which can Flush and carry cuttings to prevent accumulation and compaction of cuttings at the bottom of the well, and grind and crush large-sized cuttings to avoid sand bridges or sand sinking at the bottom of the well
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[0011] The present invention will be further described below in conjunction with accompanying drawing:
[0012] Depend on figure 1 , figure 2 As shown, a drillable self-excited guiding device includes an outer cylinder 2, the upper end of the outer cylinder 2 is connected with a collar 1, and the upper part of the collar 1 is provided with a casing thread, which is connected with the casing. The lower end of the outer cylinder 2 is connected with a guide seat 10, and the outer cylinder 2 can bear the circumferential pressure. The end of the guide seat 10 is hemispherical, so that the diameter of the upper part is larger than the diameter of the lower part, so that the sleeve can be guided in, and the inside of the guide seat 10 is hollow. . A deflector 3 is fixed inside the outer cylinder 2 through a stabilizing pin 17 , and a power assembly 4 is connected inside the deflector 3 through a cage needle bearing 16 , and the power assembly 4 is provided with helical blades outs...
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The invention relates to a self-exciting guiding device with the drilling function. The self-exciting guiding device with the drilling function mainly solves the problem that in the prior art, during casing tripping, a casing can not reach an expected position due to sand setting at the bottom of a well or collapsing of the wall of the well. The self-exciting guiding device with the drilling function is characterized in that a guiding base (10) is connected to the lower end of an outer cylinder (2), a power assembly (4) is arranged in the outer cylinder (2), a helical blade is arranged outside the power assembly (4), a follow-up impeller (8) is connected to the lower portion of the power assembly (4) through a linkage shaft (6), and an alloy steel drill bit (9) is fixed to the lower portion of the follow-up impeller (8). A casing power guiding shoe with the drilling function can wash and carry away rock debris, the rock debris is prevented from being accumulated or compacted at the bottom of the well, rock debris with the large particle size can be ground and crushed, and sand bridges or sand setting at the bottom of the well is avoided.
Description
technical field [0001] The invention relates to the field of oil fields, in particular to a drillable self-excited guiding device for casing running and well washing operations. Background technique [0002] At present, in the process of casing running, some wells are likely to cause sand bridges or sand sinking at the bottom of the well due to unclean boreholes. In some wells, the casing cannot be lowered to the expected position due to the collapse of the well wall or shrinkage of the borehole, which wastes a lot of manpower and labor. resources and cause huge economic losses. Contents of the invention [0003] In order to overcome the problem that the casing cannot be lowered to the expected position due to the sand sinking at the bottom of the well or the collapse of the well wall in the existing casing operation, the present invention provides a drillable self-excited steering device, which can Flush and carry cuttings to prevent accumulation and compaction of cuttin...
Claims
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IPC IPC(8): E21B4/02E21B21/00
CPCE21B4/02E21B21/00
Inventor 王殿义
Owner 王殿义