SU945373A1 - Apparatus for destroying solid intrusions and foreign objects in a well - Google Patents

Description

one

The invention relates to explosives used in the mining industry, mainly for the destruction of solids and foreign objects that impede the normal process of drilling wells.

A device for destroying solids and foreign objects in wells is known, including a device body, a cumulative torpedo and a fuse Cl.

The disadvantage of the device is relatively low efficiency due to the fact that it forms a single cumulative jet, which cannot ensure effective crushing of boulders and hard rocks encountered during drilling, as well as foreign objects that accidentally fall into the wells. Devices of this type are complex and expensive to manufacture and operate, and in addition, the well is clogged with splinters remaining after the explosion.

The closest to the invention in technical essence and the achieved result is an apparatus for breaking solid inclusions and foreign objects in a well, containing a support frame with several cumulative charges in individual shells and C21 blasting means.

The disadvantage of this apparatus is low work efficiency

10 due to the complexity of the simultaneous excitation and flow of detonation over all charges and significant metal consumption, which leads to the abandonment of a large number of fragments after the explosion at the bottom of the well, requiring additional cleaning of the well.

Claims (2)

The purpose of the invention is to increase the eff2 (j efficiency of the apparatus by eliminating the mutual influence of the cumulative charges on one another and maintaining their directivity. This is achieved by the fact that the device is equipped with a cushion insert placed between the charges. The insert is made of porous rubber. The drawing shows the proposed apparatus, a general view. A supporting frame is installed on the rod 1. It contains two plates 2 with coaxially arranged sockets for the main charge charges -3 and additional Charges are divided by a shock-absorbing insert 5 The plate placement during assembly relative to each other is limited by the projection 6 and the nut 7 on the rod. The additional charges k are initiated from one common fuse 8 which is fixed on the rod 1. The device works as follows When an electric fuse triggers, detonation is transmitted by elongated flexible 1 additional charges k transmitted by cumulative charges 3 located in slots 2. Simultaneous explosions of cumulative charges into the apparatus occur. e. The shock-absorbing insert 5, made of a material that absorbs well the energy of an explosion, for example, of porous rubber, ensures the elimination of the harmful effects of cumulative charges on each other. The impact of several cumulative jets and the subsequent high-explosive effect of explosion products on a destructible object greatly enhances the efficiency of the apparatus. In the proposed construction, the frame consists of two stamped plates 2 having small metal in bone and small metal, between which are shaped charges 3. They are enclosed in individual shells made of brittle material. Moving the plates 2 along a common axis and the presence of nests for the main 3 and additional charges in them makes it easy and convenient to assemble the device. The presence of a separating shock-absorbing insert eliminates the detrimental effect of the explosion on the rows on each other. The material from which the insert is made must be a good shock absorber for the shock wave. Absorption of a part of the explosion energy by a shock-absorbing insert creates the necessary conditions for the formation of a cumulative jet in each of the group of charges located in close proximity to each other. Charges operate simultaneously due to the transmission of an initiating pulse to them along sections of a detonating cord of equal length. The design of the device is simple and reliable in operation. It is easy to vary the total power of the device. Between the plates, the amount of cumulative charges that is required for a particular type of work is established. When the borehole diameter changes, only the plates i are replaced and the remaining elements of the apparatus remain constant, providing a high unification factor. The use of cheap serial cumulative charges in fragile glass envelopes and simple elements of the apparatus framework significantly reduces the cost of work on its use and does not lead to new clogging of the well with splinters. Claim 1. An apparatus for breaking solid inclusions and foreign objects in a well, containing a carrier frame with several cumulative charges in individual shells and a means of blasting, which is designed so as to improve work efficiency by eliminating the mutual influence of cumulative charges and keeping them directional; it is equipped with a cushioning insert placed between the charges. 2. The device according to claim 1, is also distinguished by the fact that the elastic insert is made of porous rubber. Sources of information taken into account in the examination 1. US patent number 3016830, cl. 102-20, published. 19b2. 2.Afanasyev.V.A. and others. The use of cumulative torpedoes for the destruction of foreign metal, while drilling into the Oil Industry. wells. 1978, No. 2, p. 12-18 (prototype)