Search results

...een the wellbore and the reservoir. To create a perforation, a perforating gun is used to “shoot” a hole through the casing and cement. The hole is ca ...construct a bazooka. The shaped charge has essentially replaced the bullet gun, which was the main perforating tool prior to World War II.

...ace. The bullets remain connected to the gun by wires, and movement of the gun pulls the bullets from the borehole wall. ...he tool is moved to a new sample location after depositing each sample. A “gun” of 30 samples, each 0.9375 in. wide by 1.75 in. long, can be taken durin

...dvantages. An illustration of cored components must be introduced prior to gun type section. ...utilized through a wireline. The difference between these two guns is the gun system. Expendable and semi-expendable are two categories that fall under

...ul, efficient, and effective due to improvements in towing technology, air gun array design, and the air guns themselves. Towing two parallel streamer cab ...ismic-data-acquisition_fig1.png|300px|thumb|{{figure number|1}}Typical air gun array signature.]]

...rons emanating from an electron source (conventionally called the electron gun) onto the surfaceof the specimen using a series of electro-optical lens ele ...vances have been made, including development of a high-brightness electron gun allowing more electrons to be focused into a smaller beam spot, an improved

* Gun barrel

...hen it produces the down-going wavelet, an amount of time equal to the air gun depth divided by the sound velocity in water is added to the measured time

* Air gun (compressed air)

...source shape is not usually known but can be measured directly (marine air gun signatures) or estimated from the signal itself under certain assumptions.