Intelligent well cementing equipment

Abstract

The invention discloses intelligent well cementing equipment. According to the intelligent well cementing equipment, every two adjacent sleeves are connected through a coupling; each coupling is provided with an RFID (Radio Frequency Identification Device) coupling chip for storing current coupling depth information; a floating ball is fixed above a rubber disc through filler; the filler can be completely decomposed after contacting with water for a preset time, so as to release the floating ball; an RFID floating ball chip is arranged on the floating ball; a circuit system is connected to a depth information reading coil and a floating ball information writing-in coil and is used for reading the depth information in the RFID coupling chip from the current corresponding RFID coupling chip through the depth information reading coil and is also used for writing the finally read depth information into the RFID floating ball chip through the floating ball information writing-in coil when not reading new depth information yet within the preset time. The well cementing equipment disclosed by the invention can be used for realizing automatic uploading of stop position information of a well cementing rubber plug, and the well cementing quality can be conveniently mastered.

Description

technical field [0001] The invention relates to the field of oil drilling equipment, in particular to an intelligent well cementing equipment. Background technique [0002] After the oil and gas drilling construction is completed, in order to ensure the safety of subsequent drilling, reinforce the well wall, or ensure the safe drilling of the lower wellbore, and achieve the purpose of sealing off oil, gas and aquifers during later drilling, casings must be run. Well cementing construction with pipes and grouting. Usually in double rubber plug cementing operations, inject cement slurry into the casing after running the casing, then run the upper rubber plug into the casing, then inject the displacement fluid into the casing, pressurize the upper rubber plug into the well and The cement slurry is squeezed out of the casing to replace the drilling fluid. Usually, in order to prevent the cement slurry from mixing with the drilling fluid, a lower rubber plug is also placed at t...

AI Technical Summary

Problems solved by technology

However, if the pump pressure does not increase after the amount of replacement fluid is reached, it is impossible to judge whether the rubber plug is in place

There are various reasons for this phenomenon. It may be that the rubber plug is not sealed after it is in place, or it may be that the rubber plug is not sealed and the downward movement is not in place. It may even be that the replacement fluid is not measured correctly on the ground, resulting in the replacement fluid not arriving.

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