Structure design method for guiding type rotary steering drilling tool
A technology of rotary steerable drilling and structural design, which is applied to drilling equipment and methods, drilling equipment, directional drilling, etc., and can solve problems that have not been studied in depth
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[0103] Example 1: The R of the mandrel 5 in the pointing rotary steerable drilling tool 外径 and R 内径 are 9.5cm and 4.5cm respectively, and the length l of the mandrel 5 is 400cm, the bias mechanism 4 is located at the midpoint of the mandrel 5, that is, AC=200cm, and the maximum deflection y of the mandrel 5 is set max = 2cm, the variation law of the axial displacement λ of the mandrel 5 after bending and the stress σ produced by the mandrel 5 is as follows, as shown in Table 1:
[0104] Table 1
[0105] Preface
No
R 外径
R 内径
J
E
y
l
P
σ
1
9.5
4.5
379.5
2100000
1
400
597.7
0.017
90.563
2
9.5
4.5
379.5
2100000
2
400
1195.4
0.069
362.250
3
9.5
4.5
379.5
2100000
3
400
179...
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