| 摘要 |
The present invention is an apparatus and method used in the cleaning out of sand in underbalanced gas wells. The present invention includes a valve subassembly equipped with an emergency shut in device to remotely control the actuation of the valve via an air or hydraulic control line. Operatively coupled to the inlet of the valve subassembly is a swivel subassembly which further enables the coupling to a tubing string. A lifting assembly attaches the valve subassembly to an elevator of a well service rig. A hardened elbow coupled to an outlet of the valve subassembly directs the gas/sand mixture being removed from the well through a hose to a collection pit. The use of the apparatus of the present invention in a sand cleanout operati on allows joints of pipe to be tripped into and out of the tubing string all the while keeping the emergency shutdown device actuator connected and operational.
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