A jet self-propelled multi-branch slimhole completion tool and its operation method

Abstract

The invention discloses a spraying self-propelled multi-branch slim-hole completing tool. The tool comprises a spraying short joint connected with the lower end of a completing pipe string, a liner pipe in sealed connection with the spraying short joint is arranged inside the spraying short joint, an annular space with upper and lower sealed portions is formed between the liner pipe and the spraying short joint, a pressure transfer hole communicated with the annular space is formed in the liner pipe, a plurality of branch slim pipelines evenly distributed in the peripheral direction are arranged inside the annular space, inlets of the branch slim pipelines are formed inside the annular space, the outlets of the branch slim pipelines penetrate through the side wall of the spraying short joint, the branch slim pipelines are connected with the side wall of the spraying short joint through a pipeline sealing joint, and self-propelled nozzles are connected to the outlets of the branch slimpipelines. The invention further discloses an operation method of the spraying self-propelled multi-branch slim-hole completing tool. The tool has the advantages that the processing radius is large, the slim hole depth is controllable, and field operation is easy and reliable.

Description

Technical field [0001] The invention belongs to the technical field of oil field development and production, and in particular relates to a self-advancing multi-branch slim hole completion tool and an operation method used in open hole wells during oil field development operations. Background technique [0002] In the production oilfields, low-efficiency wells and shut-down wells have become key factors restricting the stable production of oilfields. For low-yield, low-yield and low-efficiency wells, if the formation's liquid supply capacity is poor due to geological reasons, the development plan should increase the oil and gas drainage area. If the oil layer is polluted during the development process such as drilling and completion or oil production, the oil and gas drainage channels should be dredged. [0003] In order to increase the oil and gas discharge area, dredge the oil and gas discharge channels, and increase the liquid production of low-yield and low-efficiency wells, t...

AI Technical Summary

Problems solved by technology

These technologies not only have advantages, but also have obvious disadvantages in some aspects, for example, the treatment radius of acidizing technology is small, the fractures of fracturing technology are uncontrollable, the drilling and completion of complex structure well technology is complicated, the operation time is long, and the operation time of radial drilling technology is long. Long, requires high voltage equipment, etc.

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