SU1728825A1 - Regulator of depth of sinking of seismic signal receiving lines - Google Patents

Abstract

The invention relates to marine seismic prospecting and can be used to control the depth of a seismic receiver spit during seismic exploration in the waters of the seas. The aim of the invention is to reduce the labor intensity and increase the reliability of fastening the regulator. To do this, on the head, along the motion of the streamer 3, a sleeve 4 fixed to the latter, a groove designed to fix the body of the regulator with T-shaped and cylindrical clamps, is made with a constant cross-section smaller than the longitudinal size of the head of the T-shaped clamp, but large in its transverse size. 3 il.

Description

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The invention relates to marine seismic prospecting and can be used to control the depth of the seismic receiver during seismic surveys in the waters of the seas.

The well is known for the depth of depth control of a streamer, the mount of which is made in the form of two cages, which are in turn divided into four half-rings. Internal semi-rims fasten to a seismic receiver coupling. On the external groove of the inner half-rings there are half-rings connected to the outer half-rings attached pivotally to the body of the regulator.

The design of the suspension unit is complex and has low-streaming forms, which creates additional obstacles when towing and operating the seismic mowers. There are also inconveniences when the regulator is suspended on a seismic scythe under deck conditions of a geophysical vessel.

The closest in technical essence to the present invention is an immersion depth adjuster, in which the attachment points are made as follows. On a seismic receiver, at a certain distance from one another, two bushes are installed in pairs, consisting of two half rings, fastened with screws, in whose lower rings are located. Each ring has a longitudinal groove and a bore.

In the depth adjuster case, there are clamps with a T-shaped protruding head, which, when the adjuster is mounted on the seismic mow, are inserted into the entry holes of the sleeves of the sleeves. To prevent displacement of the depth adjuster along the streamer, spring-loaded cylindrical latches are located in front of each T-clamp. The proposed design does not allow rigid mounting of the depth adjuster to the seismic receptacle. Fatigue of the spring metal in marine conditions can lead to the unlocking of the lock and, as a result, to the loss of the depth adjuster. The design of the outlets is such that it is necessary to simultaneously wind up the regulator on both landing slots, which can only be done if there are two workers.

The purpose of the invention is to reduce the labor intensity and increase the reliability of fastening the immersion depth adjuster of the seismic receiver.

FIG. 1 shows the regulator, a general view; in fig. 2 and 3 - longitudinal grooves.

The immersion depth controller includes a housing 1, attachments 2 to the seismic mowing unit 3, each attachment assembly contains two latches; T-shaped and cylindrical, connected by a lever. In case 1 a nut is placed, along the thread of which a T-shaped clamp is moved.

On the streamer 3, the sleeves 4 are fastened in the form of two semi-cylindrical elements 5 interconnected by screws 6. The sleeves 4 have a recess in which rings 7 and 8 are located, consisting

of half rings 9 fastened with screw 10.

Each of the rings 7 and 8 has longitudinal grooves 11 and 12. The longitudinal groove 11 of ring 7 has a constant cross section and

the width and less than the longitudinal size of the protruding part of the T-shaped latch and larger than the lateral size of the latter.

The longitudinal groove 12 of the ring 8 has, in contrast to the groove 11, in the front of the hole width d greater than the longitudinal size of the protruding part of the T-shaped retainer.

Bringing into operation the depth gauge controller is performed

in the following way.

Before mounting the depth adjuster, rotating the nut, push the T-shaped lock out of the housing 1. When the T-shaped lock is extended using

connecting lever lever down the cylindrical lock. Turn the housing 1 of the depth adjuster perpendicular to the seismic plane 3 and insert the projecting T-shaped retainer head into the groove 11 of the ring 7

and again deploying the housing 1 parallel to the axis of the streamer, the housing 1 is fed in the direction of travel by the seismic mowers, the T-lock is inserted into the opening of the groove 12 of the ring 8, and then the

body 1 back. The depth controller is thus suspended at two points. Rotating the nut, clamping the T-shaped retainers on the rings 7 and 8, and the cylindrical retainer extends. As a result, the depth controller is fixed.

more reliable, which reduces the likelihood of its loss when working in the water area.

Claims (1)

Invention Formula An immersion depth regulator, comprising a housing, T-shaped and cylindrical latches, and also the head and end bushings, which provided with longitudinal slots, while the groove of the end bush is made with a size its front part is larger, and the rear part is smaller than the longitudinal size of the head of the T-shaped clamp, characterized in that, in order to reduce labor intensity and increase reliability the mounting, the groove on the head sleeve is made with a constant cross section, smaller longitudinal size of the head of the T-shaped retainer, but larger than the transverse size of the latter. FIG. one FIG. J