RU2516311C2 - Device for core separation and fixation in disassembly of core bbl - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to well drilling rig with recovery of core, particularly, to core lifters and retainer used in disassembly of sampler. Proposed device comprises top squeezing ring with handles and bottom part. Note here that top squeezing ring consists of articulated links. Said squeezing ring is secured to core lifter by top coupling screw and nut. Device bottom part is composed by bottom coupling screw and bottom squeezing ring nut. Said bottom squeezing ring consists of articulated links with shaped inner surface. Link side surface has bores to accommodate core breaker screws. Bottom squeezing ring is jointed with top ring. In disassembly of multisection lifter and disconnection of core lifter, the core is separated by tightening of core breaker screws. After core separation, said screws are tightened to the stop retain the core in top pipe. Then, bottom tightening nut is tightened to lock the core at bottom squeezing ring link shaped inner surface.

EFFECT: simplified disassembly.

8 cl, 3 dwg

Description

The invention relates to a device for drilling wells with coring, and in particular to devices for tearing and holding the core when disassembling a coring shell.

A significant number of devices are known for gripping, tearing and holding the core in a core receiving pipe of a collet or lever type (utility model patents No. 20340, 49883, 83797, invention patents No. 20111482, 2024732, 2029058, 2159840, 2276718 and many others), but all of them not suitable for the separation and fixation of the core when disassembling the coring shell.

However, a device is known which is used to hold a core in a core collection pipe when dismantling a multi-section core sampling shell using a collet core explorer (operating manual for the Kolonok core sampling shell KSK-185 / 100BI.000RE).

The disadvantages of this device are:

- increased accident risk of drilling with coring due to the possibility of core jamming at the location of this device;

- a high probability of loss of part of the core during disassembly of the shell in the case of extraction of loose, weakly cemented core.

The closest in technical essence and the achieved result to the proposed technical device is a device comprising a top crimp clamp with handles, consisting of two brackets connected by an axis. One bracket is rigidly connected to the bottom plate, in which there are special grooves for the location of the cutter knife for breaking and core separation. A screw-clamp with a nut is provided for clamping the upper crimp clamp. To preserve the maximum number of core when disassembling a coring shell, the device has two screens rigidly connected to the clamp brackets. The knife-cutter is attached to the bottom plate after core breaking by means of a screw (Security DBS product catalog: Fiberglass inner tubes, p. 5-6, 1994).

The disadvantage of the device selected as a prototype is the complexity of disassembling the projectile when extracting a solid and strong core, as well as increased explosion and fire hazard, since to separate a solid and strong core when disassembling a core sample, it is necessary to hit the cutting knife, which can cause sparking.

The task to which the claimed technical device is directed is to develop such a device for separating and fixing the core during disassembling of a core sample, the use of which in practice will significantly simplify the process of disassembling a core sample in the presence of a solid and strong core, while maintaining the possibility of use for loose core , as well as improve safety during operation of the device.

The problem is solved using a device for separating and fixing the core when disassembling a core sample, including the upper crimp clamp with handles and the lower part, the upper crimp clamp consists of links connected together by a hinge, and is fixed to the core pipe using the upper screw-coupler and nuts, the lower part of the device is made in the form of a core screw tightening on the surface of the core with a lower screw-coupler and a nut of a lower crimp clamp, consisting of those having a profiled inner surface links hinged to each other, on the lateral surface of which holes are made with core breakers installed in them, the lower crimp clamp being connected to the upper one.

The upper crimp clamp may consist of two or more links articulated to each other.

The links of the upper crimp clamp may have a smooth or profiled inner surface depending on the operating conditions of the device.

The lower crimp clamp may consist of two or more links articulated to each other.

The profiled inner surface of the lower crimp clamp can be made on the links themselves or on removable inset elements, but it is preferable to use replaceable inset elements, as this extends the life of the device and expands its operational capabilities.

Replaceable inset elements are fastened to the links of the lower crimp clamp by a rigid mechanical connection.

The number of core breakers and holes for them depends on the operating conditions.

The lower crimp clamp can be connected to the upper crimp clamp with a rigid or flexible mechanical connection.

The hinges of the links of the upper and lower crimp clamps can be combined and perform the function of communication between the upper and lower clamps.

According to the proposed technical solution, when disassembling a multi-sectional projectile and disconnecting the core receiving pipe, the core is separated by tightening the core breakers, without the use of shock, which can cause the risk of sparking and explosion. After separation of the core, the screws are screwed to the stop, and they perform the function of holding the core in the upper pipe. Then the lower tightening nut is screwed, and the core is finally fixed in the inner profiled surface of the links of the lower crimp clamp. Thus, a weakly cemented core is held by the device in the core receiving pipe for the most part by four tightening screws, while a hard and strong core is held by tightening its side surface in the inner profiled surface of the lower crimp clamp.

The analysis of the prior art by the applicant, including a search by patent and scientific and technical sources of information, with the identification of sources containing information about analogues of the claimed technical solution, allows us to establish that the applicant has not identified analogues that are identical to the claimed device, so it can be argued that the claimed invention meets patentability condition by the criterion of "novelty."

This technical solution has an "inventive step", since, according to the totality of all the essential features indicated below in the claims, for a specialist they do not explicitly follow from the prior art.

In addition, the claimed technical solution is “industrially applicable”, as it allows it to be used in the design, manufacture and use of devices for the separation and fixation of the core when disassembling a core sample

Thus, the implementation of the claimed device ensures the achievement of a technical result

The possibility of carrying out the claimed invention is confirmed by the following description of a particular case of its practical implementation and is illustrated by drawings, where Fig. 1 shows a perspective view of the device; figure 2 shows a perspective view of the device in use, figure 3 is a perspective view of the device in action with a cut-out part of the product.

The device consists of a clamp of the upper crimp consisting of 16 links 1 and 2 having a handle, a lower crimp clamp including 11, 12, core breakers 3, two joints 4, nuts 14, from the upper and lower tie bolts 5 and 6, the upper and lower tightening nut 7 and 8 with washers 15, removable insert elements 9 and 10 with a profiled inner surface and two fixing bolts 13.

The device operates as follows.

After the upper core-receiving pipe 17 is turned away from the core-receiving pipe coupling 18, the device is delivered to the installation site by holding the handles 16. Then, the device is secured by covering the core-receiving pipe 17 with links 1 and 2 of the upper crimp clamp and tightening the nut 7. After that, the links 11 and 12 are closed with inserted profiled surface elements 9, 10 and tighten the nut 8. Next, rotate the core breakers 3 until the core 19 breaks. After breaking the core, loosen the nut 8, tighten the core breakers 3 until ra, raise the upper core-receiving pipe 17 with the upper part of the core 19 and tighten the nut 8. Thus, the core is securely fixed in the inner profiled surface 9, 10 of the links 11, 12 of the lower crimp clamp and together with the upper core-receiving pipe 17 is delivered to the site for further operations.

Claims (8)

1. A device for separating and fixing the core during disassembling of a core sampling projectile, including an upper crimp clamp with handles and a lower part, characterized in that the upper crimp clamp consists of links pivotally connected to each other and is fixed to the core-receiving pipe with the help of the upper screw-coupler and nuts, the lower part of the device is made in the form of a core screw tightening on the core surface with a lower tie screw and a lower crimp clamp nut, consisting of links connected to a profiled inner surface connected between them pivotally, on the lateral surface of which holes are made with core breakers installed in them, and the lower clamp is connected to the upper. 2. The device according to claim 1, characterized in that the upper crimp clamp consists of two or more links connected together by a hinge. 3. The device according to claim 1, characterized in that the links of the upper crimp clamp can have a smooth or profiled inner surface. 4. The device according to claim 1, characterized in that the lower crimp clamp consists of two or more links connected together by a hinge. 5. The device according to claim 1, characterized in that the profiled inner surface of the lower crimp clamp is made on the links themselves or on removable inset elements. 6. The device according to claim 5, characterized in that the removable inset elements are fastened to the links of the lower crimp clamp by a rigid mechanical connection. 7. The device according to claim 1, characterized in that the lower crimp clamp is connected to the upper rigid or flexible mechanical connection. 8. The device according to claim 7, characterized in that the hinges of the links of the upper and lower crimp clamps are combined and perform the communication function between the upper and lower clamps.

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