Drill drill oil and gas wells

 

The invention relates to mining, in particular to a device intended for perforating oil and gas wells equipped with casing. Reduces the cost of energy for the drive power for cutting metal and improving the reliability and durability of the cutting tool. The inventive device includes a shaft with an element for connection with the actuator, the tip of the cutting elements. The shaft is flexible. The tip is equipped with a stepped cutting elements. They are made in the form of Central and peripheral carbide inserts. Calibrating edge of the center carbide inserts are made of a size not less than 0.6 of the diameter of calibrating the peripheral edge of the carbide inserts. The point of intersection of calibrating and cutting carbide edges of the Central plate is separated from the peripheral cutting edges of carbide inserts on the value of at least 1.1 times the thickness of the casing. The angle of the peripheral cutting edges of carbide inserts made for the curvature of the external surface of the casing. The ends of the flexible shaft are cylindrical drillings in the end face of the coupling element with the drive and speed handpiece at a depth of not particular to devices, designed for perforating oil and gas wells equipped with casing pipes.

The known device in engineering practice for drilling holes of various types - spiral with hard-alloy plates, ring, manual (Handbook of engineer-mechanical engineer/edited Cocilovo A., and Meshcheryakova R. K. - M.: Mashinostroenie, 1986, so 2, S. 137).

The disadvantage of the devices is that they are not adapted to perforate oil and gas wells equipped with casing and do not have significant reliability.

Known devices for secondary opening of productive objects, which are widely used in boring the perforators PS-112 and PS-112/70. As the cutting tool used in the drill, equipped with carbide plate. The essential feature of the drilling perforation is cut heterogeneous in its physical and mechanical properties of the environments of the metal casing, cement sheath and rocks. The most difficult from the point of view of destruction is the metal casing, so as to cut metal spent most of the drive power. When the tool from the pipe body is catching up SL is the fact limited drive power supply via logging cable causes restrictions on the diameter of the tool, and the sudden change in load leads to chipping and damage the cutting edges, the integrity of the shaft and the elements of the kinematics of the device (Yarullin R. K. About the destructive tool boring drills on the cable. //NTV AIS “Carotenic”. - Tver, 1997, vol.37, S. 96-98).

The drawback of the device is that it takes much energy the drive power for cutting metal.

The closest adopted for the prototype is a device - drilling tip. The device comprises a hollow cylindrical body with an element for connection with the actuator and the crown with the longitudinal flushing channels, equipped with cutters cutting-abrasive type. It is supplied mounted on the end surface of the casing cutters cutting-shearing type for drilling casing. The crown is installed inside the housing for axial movement relative to the housing and is designed as a cylinder with a longitudinal sectorialisme hollows (Ed. St. USSR № 1693232, MKI 7 E 21 In 43/11 declared 28.02.89).

A disadvantage of this device is that it takes much energy the drive power for cutting metal and reduced reliability and durability of the cutting tool.

Proposed St. the mi elements. The shaft is made flexible and the tip is equipped with a stepped cutting elements made in the form of Central and peripheral carbide inserts, and calibrating the edge of the center carbide inserts are made of a size not less than 0.6 of the diameter of calibrating the peripheral edge of the carbide insert and the point of intersection of calibrating and cutting carbide edges of the Central plate is separated from the peripheral cutting edges of carbide inserts on the value of at least 1.1 times the thickness of the casing, and the angle of the peripheral cutting edges of carbide inserts made for the curvature of the external surface of the casing, and the ends of the flexible shaft are cylindrical drillings in the end face of the coupling element with the drive and speed of the handpiece, at a depth of at least 1.25 times the diameter of the flexible shaft.

The proposed device allows you to reduce the cost of energy for the drive power for cutting metal and to improve the reliability and durability of the cutting tool.

In Fig.1 presents a General view of the drill hammer drill oil and gas wells, Fig.2 - the initial phase of drilling, casing, and Fig.3 - the final phase of the drilling casing.

The device (Fig.1) is what ways, made in the form of Central carbide inserts 4 and the peripheral carbide inserts 5. Calibrating edge of the center carbide plate 4 is made of a size not less than 0.6 of the diameter of calibrating the peripheral edge of the carbide insert 5. The point of intersection of calibrating and cutting carbide edges of the Central plate 4 is separated from the peripheral cutting edges of the carbide plates 5 by the value of at least 1.1 times the thickness of the casing. The angle of the peripheral cutting edges of the carbide plates 5 made for the curvature of the external surface of the casing. The ends of the flexible shaft 2 is located in a cylindrical grooves 6, made in the end of the element for connection with the actuator 3 and the speed of the handpiece 1, at a depth of at least 1.25 times the diameter of the flexible shaft 2.

The device operates as follows.

At the initial stage of drilling metal casing at the point of perforation is tip 1 (Fig.2), equipped with Central carbide plate 4. Thus is formed a hole of small diameter, equal to not less than 0.6 core diameter. After a full exit of Central carbide inserts 4 of the pipe body in the work shall peripheral carbide inserts 5, R is ergetically drive power for cutting metal, shaft loads and kinematics of the device. In the final stages of drilling the angle of the peripheral cutting edges of the carbide plates 5 (Fig.3) is based on the curvature of the external surface of the casing and provides an output peripheral cutting edges of carbide inserts 5 points, calibrating the internal and external diameters. This prevents the violation of the integrity of the cutting tool and increases the durability of the tool in General.

Thus, the proposed device allows you to reduce the cost of energy for the drive power for cutting metal and to improve the reliability and durability of the cutting tool.

Claims

Drill drill oil and gas wells containing the shaft element for connection with the actuator, the tip of the cutting elements, wherein the shaft is flexible, and the tip is equipped with a stepped cutting elements made in the form of Central and peripheral carbide inserts, and calibrating the edge of the center carbide inserts are made of a size not less than 0.6 of the diameter of calibrating the peripheral edge of the carbide insert and the point of intersection of calibrating and cutting edges C is well at least 1.1 times the thickness of the casing, and the angle of the peripheral cutting edges of carbide inserts made for the curvature of the external surface of the casing, and the ends of the flexible shaft are cylindrical drillings in the end face of the coupling element with the drive and speed handpiece at a depth of at least 1.25 times the diameter of the flexible shaft.

 

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FIELD: oil and gas extractive industry.

SUBSTANCE: method includes drilling perforation channels in wall of casing string and behind-pipe space, by drill. Drill is extended after each deepening for a length of its rod. Assembly for feeding drill is detached from received combined rod, left in drilled channel. Drill is provided with guiding elements, placed at distance from each other for keeping drilling direction. Firstly, wall of casing pipe is drilled by cutting portion of guiding element when it is in conductor of feeding assembly. With displacement into wall of casing string, another guiding element is inserted into conductor. With drilling of casing string, concurrent presence of guiding elements in feeding assembly conductor and in formed channel is provided for, said channel being used as conductor for drill after exit of guiding elements from feeding assembly conductor. Device has drilling perforator, containing electronic block, electric drive, fixing assembly, assembly for feeding drill with conductor, and case block with inbuilt cases containing drilling rods and drill. Drill is provided with guiding elements, having elliptic shape, placed at distance from each other along drill axis and turned relatively to each other for 90°.

EFFECT: higher reliability.

2 cl, 6 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes lowering perforator on tubing string into well to perforation range. Well shaft is washed. Longitudinal slit is formed in walls of casing column by reciprocal movements of tubing string. Cement ring and rock around formed slit are cleaned out by hydromonitoring jet. Load on casing column is kept under constant control by changing pressure at output of pump. Longitudinal slit in walls is formed during step-by-step increase of pressure on tubing string and concurrent control of forces of drawing-ups and fits. Increase of pressure on tubing string is performed until longitudinal slit is cut and drawing-ups and fits disappear. Following washing of cement ring and rock around formed slit is performed concurrently. Device includes sliding support, body with two spring-loaded pistons in it. The latter are interconnected via hollow rod, having apertures for liquid circulation, shear circulation valve mounted in upper portion of body, channels for passing pf washing liquid. One of said channels ends with hydromonitoring head piece, placed on pusher piston of cutting assembly, consisting of extending knurling roller connected by fork to pusher piston. Springs of pistons are welded in place of their contact with pistons. Compacting elements of the latter have edges slanted at 33-35°. Fork, in its lower portion, on the side of touching with inner surface of perforator body near output of knurling roller, is made with cut at angle of 10-15° relatively to longitudinal axis of perforator. Sliding support is mounted with space relatively to pusher piston. Second channel for passing of washing liquid ends by branch pipe. Sliding support in lower portion of perforator body is fixed by screw and nut. Washing channel with hydromonitoring headpiece in lower portion has rounded walls and its diameter is greater than diameter of output aperture.

EFFECT: higher productiveness.

2 cl, 1 dwg, 1 ex

FIELD: oil and gas extractive industry.

SUBSTANCE: according to accelerated variant, perforation of well-adjacent bed zone is performed by cased cumulative perforator. Adjustable pulse gas-dynamic bed fracturing is performed through apertures of perforator. It is provided with subsequent operation in given time of delay of main and additional gunpowder chambers. Thermal gas-chemical effect on well-adjacent zone of bed is provided for in given delay time of thermal gas-chemical chamber with charges. Implosion treatment is performed in given delay time of implosion chamber. Treatment is set by volume of implosion chamber and size of pass cross-section of flow aperture and/or group of apertures, connecting inner volumes of chambers.

EFFECT: higher efficiency.

12 cl, 3 dwg

FIELD: mining industry.

SUBSTANCE: device has body, extending cutting tool in form of two cutting disks mounted on axes, pusher piston with central and two side hydraulic channels, provided with two hydromonitoring end pieces. Disks are made with possible forming of two diametrically placed slits in a column. At axes two rockers are jointly mounted, each of which is made in form of two figured plates with apertures, wherein disks axes are positioned. According to one variant rockers are placed at end of pusher piston, and according to another one - on the body. Rotation of rocker with disks is provided for by its interaction with double wedge, mounted according to first variant on the body, according to second one - at lower portion of pusher piston. Mechanism for extending cutting rollers excludes contact of perforator body and the column.

EFFECT: higher reliability, higher manufacturability and higher productiveness.

2 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: in end piece, flow conic slit-like channel of variable section is made screwed with rotation of longitudinal axis for angle 20-60°. Section at output is decreased in comparison to input in 1.5-3 times.

EFFECT: higher efficiency.

3 dwg

FIELD: mining industry.

SUBSTANCE: device has body, pusher piston placed inside and extending cutting tool in form of cutting disk mounted on axis with mechanism for its extension. Perforator is provided with additional cutting disk, mounted on additional axis with possible performing of two diametrically placed slits in a column by cutting disks. Disk extending mechanism includes a bar mounted on central axis, on shoulders of which axes of cutting disks are placed in apertures. Bar is made with possible rotation during displacement of pusher piston.

EFFECT: higher reliability, manufacturability and productiveness.

5 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: device has body, wherein a working body source is placed in form of a set of solid fuel charges with different abrasive particles and nozzle block with nozzles in amount of no less than three in one horizontal cross-section. Nozzle block is paced between two working body sources placed adjacently to each other by burning surfaces. These are made in form of cylinders, armored along side surface and end. End is directed to device body. Nozzles of nozzle block are hermetically plugged with plugs. Plugs are made of solid fuel with their possible combustion when reaching pressure as a result of burning of working body sources, which provides for working parameters of burning product jet from nozzles.

EFFECT: higher efficiency.

3 cl, 4 dwg

FIELD: mining industry.

SUBSTANCE: device has collapsible body of at least two portions. These are held relatively to one another, have a combined axial channel and together form a hermetic ring-shaped hollow. Therein a ring-shaped cumulative charge is placed with pressed explosive substance in metallic case in form of a torus, having outer ring-shaped recess. Opposite to the latter body is made with lesser thickness of outside wall. Body has at least one inner radial channel, connecting ring hollow to axial channel. In this axial channel a means for initiating ring-shaped cumulative charge through radial channel is positioned. Portions of body are mated by ends adjacently to each other and made with possible exclusion of strains from axial loads in zone of outer wall of decreased thickness under well conditions.

EFFECT: higher reliability and efficiency.

3 dwg

FIELD: mining industry.

SUBSTANCE: method includes detonation of first perforation cannon plant, positioned outside from casing pipe in well, as a result casing pipe and first underground formation are perforated. One or more stimulating and/or effecting substances is injected through casing pipe into first underground formation. Second perforation cannon plant is detonated, positioned outside casing pipe in well. As a result said casing string and second underground formation are perforated. One or more stimulating and/or effecting substances is injected through casing pipe into second underground formation. First underground formation is isolated from injection of flowing substances prior to injection of one or more stimulating and/or effecting substances into second underground formation. First and second perforation cannon plants are cemented in underground well prior to detonation. First underground formation is isolated from injection of flowing substances after injection of one or mote stimulating and/or effecting substances through casing pipe into second underground formation. Explosive substance is set on fire by detonation of at least one explosive charge by control line, placed in underground well outside of said casing pipe and connected to at least one explosive charge. Completion system has casing pipe, at least two perforation cannons, connected to outside of casing pipe. Each perforation cannon has at least one explosive charge, targeted in direction of casing pipe. Also provided is device for isolating a zone, positioned between at least two perforation cannons for selective overlapping of flow through casing pipe. Outside the casing pipe a plant for sending signals to perforation cannons is positioned.

EFFECT: higher efficiency.

2 cl, 40 dwg

Perforator charge // 2250359

FIELD: oil industry.

SUBSTANCE: charge has axial-symmetrical explosive charge case, open hollow in form of spherical segment in body of charge, detonator and two-layer casing of hollow, made with inner diameter of base d, equal to 0.8-0.85 of charge base diameter D. two-layer casing is made with concave portion along axis equal to 0.30-0.35 d. inner layer of casing directed to hollow consists of material with lesser specific mass, of for example aluminum, and outer casing layer, directed to explosive charge is made of material with greater specific mass, for example, copper with thickness, equal to 0.030-0.035 d. relation of specific masses of inner and outer casing layers is within limits 0.15-0.23 and, respectively, relation of their thicknesses equals 0.5-0.8.

EFFECT: higher efficiency.

1 dwg, 1 tbl

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