A double hydraulic operation window with adjustable working space

A technology with adjustable working space, applied in wellbore/well components, sealing/isolation, earthwork drilling and production, etc., can solve problems such as inability to meet downhole tool running and pulling out operations, restrictions, etc., and achieve rich specialization The effect of less demand, less labor, and reduced workload
CN105064944BActive Publication Date: 2017-08-25SUZHOU DOUSON DRILLING & PRODION EQUIP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUZHOU DOUSON DRILLING & PRODION EQUIP
Publication Date
2017-08-25

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Abstract

The utility model relates to a double hydraulic operation window with an adjustable working space, which relates to the technical field of oil and gas drilling. The invention solves the problem that the traditional operation window used in the coiled tubing operation cannot satisfy the running-in and pulling-out operations of larger-sized downhole tools, which limits the operation. A double hydraulic operation window with adjustable working space, which includes a connecting flange, a stop ring, a plurality of adjusting cylinder assemblies, a main hydraulic cylinder assembly, locking screws and locking blocks; the adjusting cylinder assembly includes Head, small oil cylinder, small piston and fixed nut; the main hydraulic cylinder assembly includes the main hydraulic cylinder and the main piston; the main hydraulic cylinder is formed by fixing the cylinder body flange and the supporting flange with screws. The working space of the present invention is 3 to 5 times that of the conventional operation window, and the maximum working space can reach 1.5 meters. Two sets of hydraulic drive systems can be used to adjust the total height of the hydraulic operation window, thereby achieving the required connection length, which is extremely large. It enriches the special requirements of on-site drilling technology.
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Description

technical field

[0001] The invention relates to the technical field of oil and gas drilling, in particular to a double hydraulic operation window with adjustable working space. Background technique

[0002] Most of the gas wells enter the later stage of production. As the energy of the formation decreases, the production decreases, and the gas flow rate in the production string decreases, resulting in the inability to discharge the formation water in time, resulting in bottom-hole fluid accumulation, which causes back pressure on the production layer, and ultimately results in gas well production. sharply decreased or even discontinued. The process of running small-diameter coiled tubing (velocity string) into the existing production tubing can reduce the fluid flow area, increase the fluid flow rate, improve the liquid drainage capacity of the gas well, and restore the gas well to spontaneous production. Coiled tubing has unique advantages as a production string, which can...

Claims

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