Slip mechanism for downhole throttler

Abstract

The invention is a slip mechanism for a downhole throttler. The slip mechanism for the downhole throttler includes a centering frame, a chain and a double rod hydraulic cylinder; the centering frame is composed of a first bracket, a second bracket and a third bracket; the first bracket, the second bracket and the third bracket are on the same horizontal plane, has the same common end, and are distributed in a radial shape; the center of the centering frame is fixedly arranged with a fishing neck extending upward; the free ends of the first bracket, the second bracket and the third bracket areseparately connected with a sprocket slip unit through a pin; the sprocket slip unit is composed of a shaft pin, a sprocket and a slip; both the sprocket and the slip are fixedly sleeved outside the shaft pin; and the sprocket slip unit is connected to the centering frame pin through the shaft pin. The slip mechanism for the downhole throttler disclosed by the invention has a reasonable structuredesign, a simple structure and convenient operation, which can effectively solve the problems of inaccurate positioning, easy jamming and difficulty in fishing of the downhole throttler, and has goodpracticability.

Description

technical field [0001] The invention relates to the technical field of downhole chokes, in particular to a slip mechanism for downhole chokes. Background technique [0002] The downhole throttling technology is to seal a choke with a suitable specification at a certain depth in the downhole tubing to realize throttling and pressure reduction in the tubing, increase the fluid flow velocity, make full use of the ground temperature to heat the fluid, and prevent the formation of hydrates. Simplify the surface process and save the cost of oil and gas field exploitation. [0003] Currently commonly used chokes include slip-type downhole chokes and preset downhole chokes. Slip-type downhole choke is mainly composed of nozzle sleeve, seat seal spring, sealing rubber tube, cone, slips and delivery head. When the gas well needs downhole throttling, use the test vehicle and the wellhead blowout preventer to lower the throttle to the required position, lift the steel wire, and the co...

AI Technical Summary

Problems solved by technology

[0004] Among them, the slip positioning is the most important in the realization of the entire throttling function, but there are still big problems in the accurate positioning of the slips, and in the salvage process of the slip choke, the slips and the inner wall of the tubing often Stuck, causing the restrictor to be difficult to salvage normally

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