SU848582A1 - Core-breaking tool - Google Patents

Description

(54) CORNER

The invention relates to mining, namely to spring cores, and can be used to seize the separation and retain the core in colliquate shells during exploration, exploration wells. Spring type corers are known for tearing off and holding the core in a core receiver device, made in the form of a split spring ring, kneaded in the body, the main feature of which is the implementation of longitudinal through grooves to ensure strength and increase spring ability of the ij ring. However, such cores do not provide reliable the capture and retention of the core, especially when it is torn off due to the small force applied to the column core, having a diameter that is much smaller than the entrance hole and the core catcher. Also known is a core breaker, a housing body and wedge gripping elements associated with arcuate spring-ups, by means of which better grip and core movement and wedge elongation are achieved: & in the comic groove of the G21 body, However, the core band is characterized by insufficient core coupling because of in the absence of a rigid edge at the point of contact of the arcuate springs with the core. The purpose of the invention is to increase the reliability of the core drive by increasing the adhesion force to the core. This goal is achieved by the fact that in the core ring arcuate springs are made of plates doubled in the plane of deformation, each of which has a variable thickness increasing in the direction opposite to the direction of increasing the thickness of the adjacent plate. 1 shows the proposed kernvatel with a partial cut; figure 2 - section aa in figure 1; yy fig.Z - core with core inside. Kernvator consists of body 1 with an internal conical surface, c. in which the wedge wedge is movably placed (gripping elements in the form of a split holder 1 1 of the memory. The holder has an outer conical surface 4 and a plurality of longitudinal openings 5 with a shoulder b formed by an annular groove 7. On the ledge in the openings of the magazine are installed

arcuate springs 8, made in the form of spring plates doubled in the plane of deformation. The thickness of each plate decreases from one end to the other, and the thin end of one plate 9 is rigidly connected with the thickened end of the other plate 10 to form a gripping edge 11, and the other is attached. With the valuable end it is attached to the ledge of the aperture with rivets 12 or otherwise (screw, welding etc.) The free end of the plate 10 is located in the depth of the opening of the collar, freely in contact with the inner surface of the housing and is designed to force the gripping element against the incoming core. The adapter 13, which is screwed into the case, locks the holder of the core holder, restricting its movement upwards, and serves to connect the core holder to the core device. The bottom part of the core case has an internal thread 14 for connection to the bit.

The proposed corenator works as follows.

When the core enters the core into the core breaker and then into the core receiver, the plates 9 and 10, pressed by the core column, fold and enter the openings 5 of the sleeve 3, taking a position close to the vertical one, and the sleeve the gap between the core and the walls of the housing 1 is enlarged and the core freely passes into the core receiver. Being constantly in the spring-loaded state due to the interaction of the spring plates 9 and 10 mesed themselves and the plates 10 s. The inner surface 2 of the housing 1, the gripping Edges 11 compress the core column with a force sufficient to break it and hold it.

When the core is torn off, when the core drill together with the drill goes up, the gripping edges of the 11 plates, due to squeezing due to the action of the spring plates 9 and 10, are inserted into the core, and the sleeve 3 moves down along the conical surface 2 of the housing 1, thus, the gap between the core and the walls of the housing is reduced, providing additional pressure on the pressure of the spring plates 9 and 10 and the edges 11, and as a result the core is torn off and securely held in the core receiver during transportation from the well.

The design of the kernel provides an increase in its cruelty and strength.

Claims (2)

1. USSR Author's Certificate No. 232831, cl. E 21 V 25/00, 1966. 2. US Patent 2066625, cl. 175-254, 19.77 (prototype) .. BUT Fy A-A S .Z