Oil well casing reconditioning tool
An oil well casing and subsidy technology, applied in wellbore/well parts, earthwork drilling and production, etc., can solve the problems of large contact area, high requirements, and high hydraulic system pressure, and achieve small contact area, reasonable structure and wide adaptability Effect
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[0030] Attached below in conjunction with the instructions figure 1 , Figure 1a , Figure 1b , Figure 2a , Figure 2b , image 3 The structure and working principle of the casing subsidy tool of the present invention are further explained:
[0031] First, make an explanation about the casing subsidy tool currently in use: as attached image 3 As shown, there is a cone 59 inside the expansion tube 3. The piston 16 is pushed by the ground hydraulic system, and the piston 16 pushes the cone 59 forward along the axial direction of the expansion tube, and then squeezes the expansion tube 3 to deform it and adhere to the damage. Casing, to achieve the purpose of subsidies.
[0032] Attached figure 1 Under the working conditions, first attach the expansion head 58, the downhole motor 18, the drill pipe 17, the sliding sleeve device, and the expansion tube 3 at the wellhead before work. figure 1 After the sequence is assembled, the drill rod 17 is used to connect the upper part of the ...
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