Expansion-type rotatable tail pipe hanger
A liner hanger and hanger technology, which is applied in wellbore/well parts, earthwork drilling, sealing/isolation, etc., can solve the complex structure of slip-type liner hanger, many construction safety hazards, and cementing problems. Quality is difficult to guarantee and other issues, to achieve the effect of improving the success rate of downloading, saving materials, and fewer parts
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[0056] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0057] As shown in Figure 1, the lifting nipple 1, the central tube 7 and the rubber plug nipple 8 are sequentially connected in series to form the assembly base of the hanger, wherein the upper end of the central tube 7 is sleeved on the outer surface of the upper thread 23 Inside the lower end of the lifting nipple 1, the lower end of the central tube 7 is sleeved inside the upper end of the rubber plug nipple 8 through the lower thread 10 on the outer surface; the inner surface of the lower end of the rubber plug nipple 8 is designed with rubber plug threads 9 for connection Tail pipe rubber plug 40.
[0058] An expansion cone 21, a hanger body 5, and a conversion joint 6 are sequentially sheathed outside the central tube 7 between the lifting sub-section 1 and the rubber plug sub-section 8. That is, under the lifting sub-section 1, the central tube 7 is sheath...
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