SU829862A1

SU829862A1 - Core-separating device

Info

Publication number: SU829862A1
Application number: SU792773242A
Authority: SU
Inventors: Валерий Викторович Чуносов; Владимир Владимирович Чубаров; Борис Николаевич Кузовлев; Александр Николаевич Попов
Original assignee: Московский Ордена Трудовго Крас-Ного Знамени Геологоразведочныйинститут Им.C.Орджоникидзе
Priority date: 1979-05-29
Filing date: 1979-05-29
Publication date: 1981-05-15

Description

(54) УСТРОЙСТВО ДЛЯ ОТДЕЛЕНИЯ КЕРНА(54) DEVICE FOR KERN DEPARTMENT

ii

Изобретение относитс к устройствам дл отделени керна при колонковом бурении скважин большого диаметра при проведении подготовительных выработок в рудных и угольных пол х, промышленном и гражданском строительстве, при сооружении скважин под сваи, при инженерных изыскани х и разведке месторождений полезных ископаемых .The invention relates to devices for separating core during core drilling of large-diameter wells when carrying out preparatory workings in ore and coal fields, industrial and civil construction, when constructing wells under piles, during engineering exploration and prospecting for mineral deposits.

Известно устройство дл отделени керна от массива породы в скважине большого диаметра, представл юш,ее собой совокупность закрепленных в боковых стенках колонкового бура гидроцилиндров с пуансонами . Отделение керна этим устройством осуществл етс при внедрении пуансонов в стенку керна 1.A device for separating a core from a rock mass in a large-diameter well is known, which is a yush, which is a combination of hydraulic cylinders with punches mounted in the side walls of a core drill. The separation of the core with this device is carried out when inserting punches into the wall of the core 1.

Недостаток этого устройства заключаетс в том, что дл его работы необходима высоконапорна масл на станци , маслопровод высокого давлени , опускаемый в скважину длиной не менее глубины скважины , прочное коллекторное кольцо в корпусе бура дл размещени в нем гидроцилиндров . К тому же размещение гидроцилиндров в боковых стенках бура приводит к их утолщению, а следовательно, к увеличениюThe disadvantage of this device lies in the fact that its operation requires high-pressure oil at the station, a high-pressure oil pipeline lowered into the well with a length not less than the depth of the well, and a strong collector ring in the drill body to accommodate hydraulic cylinders. In addition, the placement of hydraulic cylinders in the side walls of the drill leads to their thickening, and consequently, to an increase in

ширины зазора между стенкой скважины и керном, разрушению дополнительного объема горной массы.the width of the gap between the borehole wall and the core, the destruction of the additional volume of the rock mass.

Наиболее близким к предлагаемому по технической суш,ности и достигаемому результату вл етс устройство дл отделени керна, включающее бурильную колонну, колонковый бур с центральной трубой, ударный снар д, конус и пуансоны.The closest to the proposed technical dry and the achieved result is a core separation device, including a drill string, a core drill with a central tube, a percussion projection, a cone and punches.

Отделение керна посредством этого устройства осуществл етс в результате внедрени пуансонов в стенку направл ющей скважины, пробуренной по оси керна, под действием силового элемента, состо щего из клина и ударной штанги, перемещающейс внутри бурильной колонны. Это устройство позвол ет отдел ть керн при минимальной ширине кольцевого зазора между стенкой скважины и керном (2.The separation of the core through this device is carried out as a result of the insertion of punches into the wall of the guide hole drilled along the core axis under the action of a power element consisting of a wedge and a shock bar moving inside the drill string. This device allows the core to be separated with a minimum annular gap width between the borehole wall and the core (2.

Недостаток этого устройства заключаетс в том, что энерги ударной штанги ограничена ее массой и скоростью соударени , поэтому усилие пуансонов оказываетс недостаточным дл отделени керна в крепких и очень крепких породах.The disadvantage of this device is that the energy of the shock rod is limited by its mass and speed of impact, therefore the force of the punches is insufficient to separate the core in strong and very strong rocks.

Claims

The purpose of the invention is to increase the efficiency of the device. This decree is achieved by the fact that the percussion projectile is made in the form of a cylinder with a chamber in which the explosive cartridge is located, and with a piston connected by means of a rod to a cone, while the percussion projectile is installed in the central tube with the possibility of fixation. In addition, the device is equipped with a valve located on the side wall of the cylinder at a distance from its lower end, exceeding the height of the piston. FIG. 1 shows the device, a general view; in fig. 2 is a longitudinal section of the impact device. The device consists of a drill string 1, a core drill 2 with a central tube 3, a strike shell 4 and punches 5. The impact shell is made in the form of a cylinder 6 with a chamber 7 and a stopper 8. The cylinder has a mushroom head 9, a cover 10, a piston And, a rod 12 connected to a cone 13, a valve 14 and a latch 15. The explosive cartridge 16 is placed in the chamber with electro-excitation wires 17. The device operates as follows. The projectile 4 is lowered on the cable inside the drill string before the cone 13 is placed on the punches 5. The cable is disconnected from the mushroom head 9 and the stopper 8 is fixed in the central tube 3 of the core drill 2. The cone with the rod and piston is held in its extreme upper position a latch 15. A wire 17 is sent to the blasting cartridge 16, causing a chemical reaction in it, which results in the accumulation of high-pressure gases in the space above the piston 7. Under the action of gas pressure on the piston 11, the rod 12 is lowered down, pushing the punches 13 with the cone 13. In the lowest position of the piston, the valve 14 opens and the gas from the chamber flows directly into the well. As the punches are introduced, the internal stresses in the core material increase and when they reach their limit values corresponding to a certain depth of the punches penetration, the core separates from the array. The stroke of the piston 11 from the extreme upper position until the opening of the valve 14 is chosen such that it provides the insertion amount to the punches at which the core is separated from the array. The core is lifted from the well together with the core drill 2, while the core is held in it by the punches 5. On the surface, the percussion projectile is removed from the central tube 3 for recharging. For this purpose, the mushroom head 9 is seized and, drawing it out, release the stopper 8. The proposed device allows reducing the time for performing the core separation operation, expanding the device application area by increasing the force on the punches by several times. Claim 1. A device for separating a core, including a drill string, a core drill with a central tube, a percussion projectile, a cone and punches, characterized in that, in order to increase the efficiency of the device, the percussion projectile is made in the form of a cylinder with a chamber, which is located explosive cartridge, and with a piston connected by means of a rod with a cone, while the shock projectile is installed in the central tube with the possibility of fixation. 2. The device according to claim 1, characterized in that it is provided with a valve located on the side wall of the cylinder at a distance from its lower end greater than the height of the piston. Sources of information taken into account during the examination 1. V. B. Borisovich dr. Drilling of large diameter wells. M., Nedra, p. 125

2. USSR author's certificate number 341995, cl. E 21 V 25/00, 1967.