Revolving speed limiting impulse sprinkler for well cleanout
A speed-limited, pulsed technology, which is used in wellbore flushing, wellbore/well components, earth-moving drilling, etc., to solve problems such as the inability of the friction device to effectively control the rotational speed, the single friction block, and the reduced well-flushing effect.
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[0018] Embodiment 1: Taking the 160mm type pulse nozzle with limited rotation speed for well washing as an example, it will be further described in detail.
[0019] refer to figure 1 . The 160mm type limited-speed pulse nozzle for well washing is a kind of 5 / 8"For oil and gas wells with casings of the type above and above, it is installed on the joint at the bottom of the downhole pipe string during well cleaning operations. The nozzle can effectively control the rotation speed within a certain range and generate pulsed jets to remove the sand on the well pipe wall. Bridge, rust, paraffin and other attachments, to achieve normal and efficient well cleaning operations. Mainly composed of center pipe 1, end cover 2, friction wheel assembly 3, pin 4, upper joint 5, nozzle A6, middle joint 7, lower joint 8, seat 9, bottom joint 10, nozzle B11, O-shaped rubber seal ring A12, thrust ball bearing 13, O-type rubber seal ring B14, O-type rubber seal ring C15, shaft elastic retaini...
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