Introduction of downhole throttling process

(1) fixed downhole throttling process principle with the production pipe column will choke working barrel down to hydrate prevention predicted depth, then the throttle (installed corresponding specifications gas nozzle) by testing the car into the working barrel, downhole throttling production can be realized, and according to the gas well production situation change of underground gas nozzle specifications, thereby to prevent hydrate objective.
(2) movable downhole throttling process principle of gas well downhole throttling when needed, wells without pressure well and tubing. Using the test car will activities down to the design position of the gas nozzle back seat sealing, can realize the downhole throttling. Salvage replacement of underground gas nozzle before the first impact deblocking, special tool for fishing again under the gas nozzle remove, the utility model has the advantages of no need operation, flexible adjustment, convenient replacement.