Separated layer water-flooding process tubular column capable of being drilled
A technology of pipe string and layered water injection, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc. It can solve the problems of serious scaling and difficulty in unsealing tools, and achieve the effect of saving operating costs
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[0022] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.
[0023] like figure 1 , 2 As shown, upper joint-1, positioning sleeve-2, back cap-3, cylinder barrel-4, auxiliary piston-5, connecting sleeve-6, sliding sleeve-7, main piston-8, central tube-9, thrust sleeve -10, ball seat-18, retaining ring-29, spring-30, steel ball I-31, steel ball II-37 form the sealing tool.
[0024] Upper pressure ring-11, lock spring I-12, upper rubber cylinder-13, upper cone I-14, upper slips-15, lower cone I-16, upper rubber cylinder shaft-33, auxiliary piston scissors- 35. The sliding sleeve shear nail-36 forms the upper plugging tool.
[0025] Sealing sleeve-17, block-19, lower main piston-20, lower cylinder liner-21, lower rubber cylinder shaft-22, lower rubber cylinder-23, upper cone II-24, lower slips-25, lower cone Body II-26, setting shear nail-27, and lock spring II-28 form the lower plugging tool.
[0026] The upper...
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