FIELD: construction.
SUBSTANCE: jacket for a perforator moving along a guide in a longitudinal direction attached to the perforator guide on its two sides and making, together with the guide, a substantially closed space, where there is a perforator and at least the main part of a drilling rod located outside a well. At least a part of the sound-absorbing jacket is formed of two shells, i.e. an internal shell located in an external shell and attached to it to form substantially a single stable structure and a space that contains air or other gas or a gaseous mixture.
EFFECT: invention ensures stiffness and lightness of the jacket structure, improved sound-absorbing capacity.
21 cl, 4 dwg
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