A tcp perforating method

Abstract

The invention relates to a downhole perforation method. In order to solve the technical problem that the delay time of gunpowder is short and the accidental perforation is easily caused when the coiled tubing separator delay perforation dragging process is adopted for the downhole perforation, a TCP perforation accident is provided. The perforation method includes conveying the pipe string to the downhole to be perforated, the pressure sensor detects the pressure signal downhole in real time, and sends it to the detonating element; when the pipe string is started to work, the working pressure pulse signal is released to the downhole through the tubing at the wellhead, and the detonating element judges If the received pressure pulse signal is consistent with the preset start signal, control the electronic selection switches to work in sequence according to the preset time interval; if a fault occurs, the fault pressure pulse signal is released to the downhole through the tubing at the wellhead; the pressure sensor detects the fault pressure pulse The signal is sent to the detonating element; if the detonating element judges that the received fault pressure pulse signal is consistent with the preset fault signal, it stops executing the preset delay program, proposes the pipe string to troubleshoot the fault, and then performs the above steps again.

Description

technical field [0001] The invention relates to a downhole perforation method, in particular to a TCP perforation method. Background technique [0002] When perforating downhole, if the casing is deformed, the pumping and selection of perforating holes cannot work normally. Therefore, the coiled tubing separator delay perforation dragging process is generally used, that is, the coiled tubing is dragged through the coiled tubing during the delay period. String to the designated position for perforation. This process solves the problem that the pumping perforation cannot be constructed normally after the casing is deformed. However, due to the relatively short delay time of gunpowder, usually 6-10 minutes, if there is a failure during the dragging process , the perforation position cannot be reached within the delay period, which may cause misperforation accidents. SUMMARY OF THE INVENTION [0003] The invention provides a TCP perforating method for solving the technical pr...

AI Technical Summary

Problems solved by technology

[0002] When perforating downhole, if the casing is deformed, the pumping hole cannot work normally. Therefore, the coiled tubing diaphragm delay perforation dragging process is generally used, that is, the coiled tubing is used to drag the coiled tubing during the delay period. String to the designated position for perforation. This process solves the problem that the pumping perforation cannot be carried out normally after the casing is deformed. However, due to the relatively short delay time of the gunpowder, generally 6-10 minutes, if there is a failure during the dragging process , the perforation position cannot be reached within the delay period, which may cause misperforation accidents

Images