PL158944B1 - Apparatus for taking samples of bore-hole core - Google Patents

Abstract

A device for collecting the core in a drill hole, consisting of a core barrel and a bit, characterized in that between the core barrel (I) and the bit (III) is a core connector (II) consisting of an upper connecting element (4) and a lower connecting element (5), which are connected together by means of threads and whose inner walls have flow channels (6) for circulation of drilling fluid, shielded respectively by an upper cover sleeve (8) and lower cover sleeve (13) with a ring (14) applied, and in addition loosely mounted in the lower connecting element (5) is a sleeve (9) on the outside of which are lengthwise channels (10) for the flow of drilling fluid, while inside the lower connecting element (5) is a conical seat (11) used to mount a ring-type core lifter (12).<IMAGE>

Description

© PATENT DESCRIPTION ®PL © 158944

REPUBLIC

POLAND

(g) Application number: 273198

Office ^P t ^en t ^ow y @ ^{Application date: 17} · ⁰⁶ · ¹⁹⁸⁸

Polish Republic

Device for sampling the core in a wellbore ^Flag łoszeme ^g of łoszono:

1989-12-27 BUP 26/89 © B1 @ IntCl ⁵

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Polskie Górnictwo Naftowe i Gazownictwo Zielonogórski Zakład Górnictwa Nafty i Gazu, Zielona Góra, PL (45) The following was announced about granting the patent:

October 30, 1992 WUP 10/92 @ Inventors:

Bolesław Wojnar, Zielona Góra, PL Grzegorz Kurgan, Nowa Sól, PL Andrzej Pietrowski, Nowa Sól, PL Tadeusz Michalski, Zielona Góra, PL Albin Sokół, Zielona Góra, PL

PL 158 944 Β1

57) Device for taking the core in the borehole, consisting of a core barrel and a core bit, characterized in that there is a core connector (II) between the core barrel (I) and the crown (III), which consists of threads connected to each other , the upper connector (4) and the lower connector (5), on the inner walls of which there are flow channels (6) for the scrubber circulation, covered respectively with the upper shield sleeve (8) and the lower shield sleeve (13) with a ring (14) attached, in addition, a sleeve (9) is loosely mounted in the lower connector (5) having outside longitudinal channels (10) for the flow of the washer, and inside the lower connector (5) has a conical seat (11) for mounting an annular ripper (12).

CORE COLLECTING DEVICE

Claims (1)

Patent Reservation Device for taking the core in the borehole, consisting of a core barrel and a core bit, characterized in that between the core barrel (I) and the crown (III) there is a core connector (II), which consists of an upper connector connected by threads (A) 1 lower connector (5), on the inner walls of which there are flow channels (6) for the scrubber circulation, respectively covered with the upper protective sleeve (8) 1 the lower protective sleeve (13) with the ring (14) put on in the lower connector (5), a sleeve (9) having outside longitudinal channels (10) for the flow of the washer is loosely mounted, and inside the lower connector (5) has a conical seat (11) for mounting the ring of the extractor (12). «« · The subject of the invention is a device for taking a core in a borehole, which is used for collecting the core, especially in hard and very hard rocks. It is known from the industry standard BN-74 / 1774-03 a double core barrel, which consists of a body connected by a thread with upper connectors used to connect with the drill rig / rn cable and a lower connector used for connection with a core bit. Inside the fuselage there is an internal pipe used to introduce the obtained core. A flap fragment of the core is placed in the core, especially the roller crown. The disadvantage of this core cutter is that when the core is torn off and pulled out of hard and very hard rocks, the jaws of the cutter are broken or deformed or they slide over the surface, as a result of which the broken core is slippery to the surface or it is removed in a small amount. There is also known from the Polish description of utility model No. 35 266 a device for collecting cores in boreholes, consisting of an outer pipe, wet ^ n ^ from which a pipe is suspended on a bearing, ending with a connector eG ^, a thread of which is additionally placed the upper cutter cooperating with the lower cutter placed in the core bit cutter. The use of two flap lifters, during breaking and pulling of the core, occurs in hard rocks and very hard rocks, frequent destruction of the uryaak's paws and leaving the core at the bottom of the hole. It is also known to collect the core with a Flray Christianem multi-core core barrel, Gosposite Catalog of 011 Field Equlpment and SθΓvlcas, Yolume 1, Houston, Texas, 1970-1971 pp. 1242 degree of their hardness. This device is not applicable when drilling with other types of cores than diamonds, due to different types of threaded connections, overall dimensions as well as other construction of the core breaker. In addition, this solution, used in geological layers of variable hardness, causes partial leaching of the core in places with poor rock cohesion. It is also known from the Polish application for utility model No. W.66819 a double core barrel consisting of an outer tube and suspended inside it on an elongated bearing of the inner tube ending with a body in which a clamping cylindrical-conical piece of the core is placed. This core barrel has similar drawbacks to the previously described devices. The device for taking a core, according to the invention, consists of a core barrel and a core bit by the fact that between the core body and the core there is a core connector, which consists of an upper connector and a lower connector connected to each other by means of threads. - different walls with flow channels for the scrubber circulation 158 944 shielded respectively with the upper protective sleeve and the lower protective sleeve with an attached ring. In the lower connector there is a loosely mounted sleeve having on the outside longitudinal channels for the flow of the scrubber, and inside the lower connector has a conical seat for mounting an annular ripper. The invention enables the extraction of the core from hard and very hard rocks as a result of the use of connectors, tulel and pincers in the device between the core barrel and the crown. With this device it is possible to take cores even if the layers are drilled through them. The Wynnlazek is shown in an exemplary embodiment in the drawing in a half view and a longitudinal half section. The device for taking a core according to the invention consists of a core barrel I connected by tool threads to the connector of the kernels ^^^ m II to the crown III. The core barrel I consists of two concentric tubes, of which the outer tube 1 constitutes the core barrel, and the inner tube 2 constitutes the container protecting the core against the influence of drilling fluid. The core body I ends in its lower part with a threaded pin 3, which is connected to the upper joint 4 of the core connector II. The upper link 4 is threaded to the lower link 5, which in turn is also threaded to the crown III. On the outer walls of the upper link 4 and the lower link 3 there are flow channels 6 for the scrubber circulation. The upper connector 4 has a socket 7 for mounting the inner tube 2 of the core barrel I. Below the socket 7 there is an upper covering sleeve 8 that protects the core against the operation of the washer. In the lower connector 5 there is loosely mounted a sleeve 9 having outside longitudinal channels 10 for the flow of the washer, and inside it has a conical seat 11 for mounting a ring-shaped tear-off device 12. Below the sleeve 9 there is a lower covering sleeve 13, which has a ring 14 placed in its lower part. . The operation of the device is similar to known core harvesting devices. After the device has been dropped to the bottom of the drilled hole and flushed with drilling fluid, drilling is performed with the crown III. After drilling the core of the required length, the core of the drilled rock is torn off by means of a ring-cutter 12 by pulling the device upwards.