Well drilling top drive sliding fastening-change head assembly
A buckle head and top drive technology, applied in the field of variable buckle head, can solve the problems of cumbersome operation, complex structure of top drive variable buckle head and drill pipe shackle, etc., achieve simple mechanism and operation, protect screw thread, and protect drilling tools Effect
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[0009] The present invention will be further described below in conjunction with accompanying drawing:
[0010] Depend on figure 1 combine figure 2 As shown, the sliding variable button head assembly of the top drive for drilling includes a manual blowout preventer 1. There is an annular step 2 outside the lower end of the manual blowout preventer 1. A storage chamber is formed by the annular step 2 and the upper end of the variable button head 4. The storage chamber stores Drilling fluid with a certain pressure plays a role of damping; the lower end of the manual blowout preventer 1 is connected with a sliding sleeve 3, and the lower step hole of the sliding sleeve 3 is connected with a variable button 4 through a spline, that is, through the spline to the variable button The transmission torque of the head 4 can also make the variable button 4 move up and down through the spline, and when loading and unloading the drill pipe, it will reduce the weight on the variable butto...
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