Salvage method for throttle buried and stuck by fracturing sand

Abstract

The invention belongs to the technical field of oil and gas exploitation, and particularly relates to a salvage method for a throttle buried and stuck by fracturing sand. The method comprises the following steps that firstly, drifting is conducted, and the depth of the throttle is judged; next, a lead printing tool string combination is discharged, and the fracturing sand condition is judged; next, a sand salvage tool string combination is discharged to replace the lead printing tool string combination, sand salvage operation is conducted till sand salvage is completed, and a lead mark is judged to be a throttle salvage neck; and finally, a salvage socket tool string combination is lowered, and the throttle is grabbed to be continuously lifted and vibrated, until salvage of the throttle iscompleted. Therefore whether the underground belongs to the fracturing sand burying or not is judged more simply and accurately, the fracturing sand salvage efficiency is higher, and the throttle buried and stuck by the fracturing sand can be salvaged more effectively.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploitation, and in particular relates to a fishing method for burying a jammed flow restrictor with fracturing sand. Background technique [0002] At present, in the complex processing operation of downhole problematic chokes, there are few publications in the prior art for the salvage method of fracturing sand buried stuck chokes, only retrieved, and published in the collection of the 8th Ningxia Young Scientists Forum , it is mentioned in the exploratory application of coiled tubing technology on salvage chokes that when sand chokes in gas wells are buried by fracturing sand, sand can be discharged by wellhead discharge. However, this discharge method It can only meet the sand discharge under the normal operation of the gas well restrictor, and its discharge effect is not satisfactory, but it cannot meet the requirements for the situation of fracturing sand cementation or gas well blockage...

AI Technical Summary

Problems solved by technology

[0002] At present, in the complex processing operation of downhole problematic chokes, there are few publications in the prior art for the salvage method of fracturing sand buried stuck chokes, only retrieved, and published in the collection of the 8th Ningxia Young Scientists Forum , it is mentioned in the exploratory application of coiled tubing technology on salvage chokes that when sand chokes in gas wells are buried by fracturing sand, sand can be discharged by wellhead discharge. However, this discharge method It can only meet the sand discharge under the normal operation of the gas well restrictor, and its discharge effect is not satisfactory, but it cannot meet the requirements for the situation of fracturing sand cementation or gas well blockage