초록 ▼

Two or more spaced formations located downhole in a borehole are completed by employment of a string of perforating guns and by making a single trip to the wellbore. An upper and a lower gun device are tied together by a connecting tubing. The length of the tubing spaces the guns apart a selected am

Two or more spaced formations located downhole in a borehole are completed by employment of a string of perforating guns and by making a single trip to the wellbore. An upper and a lower gun device are tied together by a connecting tubing. The length of the tubing spaces the guns apart a selected amount. The gun string is run downhole and actuated, whereby the casing is perforated adjacent to the two spaced formations. Detonation of the upper gun forces an upper movable member associated with the connecting tubing to generate a pressure wave which is received by a lower movable member located at the upper end of the lower gun. The lower member is connected to cause detonation of the lower gun.

대표청구항 ▼

A method of perforating two spaced-apart formations, comprising the steps of: positioning a first perforating gun in a borehole adjacent to a first formation and a second perforating gun in the borehole adjacent to a second formation; detonating the charges of the first gun to create a pressure shoc

A method of perforating two spaced-apart formations, comprising the steps of: positioning a first perforating gun in a borehole adjacent to a first formation and a second perforating gun in the borehole adjacent to a second formation; detonating the charges of the first gun to create a pressure shock wave, the pressure shock wave being generated by application of the explosive force from firing the first gun to a movable wall closing one end of a column of fluid; directing the pressure shock wave to means for detonating the charges of the second gun; and detonating the charges of the second gun in response to said pressure shock wave. Apparatus for completing a well, comprising: first perforating means for perforating one portion of the well; second perforating means for perforating another portion of the well; means for transmitting a fluid pulse upon detonation of said first perforating means, said means for transmitting a fluid pulse including a conduit extending between said first and second perforating means and substantially filled with fluid and movable wall means within said conduit for applying pressure to the fluid upon detonation of said first perforating means; and means for receiving said fluid pulse to actuate the detonation of said second perforating means.