Efficient anti-resistance strong magnetic fisher

Abstract

The invention discloses an efficient anti-resistance strong magnetic fisher which is movably arranged in an oil well shaft in a penetrating mode and used for adsorbing and fishing residues in the shaft and on the inner wall of the shaft, and the whole fisher is a tool with an upper connector and a lower connector at the two ends in sequence. A plurality of stages of strong magnetic adsorption bodies are arranged on the tool between the upper connector and the lower connector in the length direction of the tool, and each stage of strong magnetic adsorption body is arranged in the circumferential direction of the outer wall of the tool in a surrounding mode. Each stage of strong magnetic adsorption body comprises strip-shaped strong magnetic strips which are arranged on the outer wall of thetool at intervals in the circumferential direction and exposed out of the outer wall, and grooves matched with the strip-shaped strong magnetic strips in an embedded mode are formed in the outer wallof the tool. The strong magnetic fisher is provided with the multiple stages of strong magnetic adsorption bodies which are arranged in the circumferential direction in cooperation with a tool in a surrounding mode, a large and effective adsorption area can be formed, more residues can be adsorbed in the one-time downhole fishing process, the downhole fishing frequency and operation cost of a whole shaft are reduced, and meanwhile the damage probability of the fisher is reduced.

Description

technical field [0001] The invention relates to the technical field of wellbore cleaning of oil wells, in particular to an efficient anti-blocking strong magnetic fishing device. Background technique [0002] During the drilling and completion process, the inner wall of the wellbore will often be attached by mud hardened blocks, cement sheaths, rust and cementing residues. In oil production and workover operations, it will also be attached by dead wax and scale, and fish garbage will accumulate at the bottom of the well. These conditions will cause blockage of the pipe string and flow channel, corrosion of the inner wall, serious accidents, and even damage to the inner wall. Oil wells are scrapped ahead of time, resulting in a huge cost burden. Therefore, it is necessary to effectively clean up the residue adhered in the wellbore of the oil well to ensure the normal operation of the oil well in the later stage, so as to shorten the entire oil production cycle. Contents of...

AI Technical Summary

Problems solved by technology

In oil production and workover operations, it will also be attached by dead wax and scale, and fish garbage will accumulate at the bottom of the well. These conditions will cause blockage of pipe strings and flow channels, corrosion of inner walls, serious accidents, and even Oil wells are scrapped ahead of time, causing a huge cost burden

Images