Method of well configuring

FIELD: mining.

SUBSTANCE: this method consists in well drilling by rock cutter tool of well bottom tool connected with dual drill string with continuous slurry removal from well bottom and transfer of slurry by used working fluid flow under pressure via central channel of said dual drill string. This dual drill string is composed of stationary external pipe accommodating drill bar transmitting the torque and axial force to drill bit with rock cutter tool. At a time, said external pipe is fitted in said drilled well to be left therein as a casing after drilling. Dual drill string central channel is composed by drill bar channel.

EFFECT: higher efficiency and reliability, lower costs, expanded applications.

2 cl, 1 dwg

 

The technical solution relates to the mining and construction industry, and in particular to methods of drilling with simultaneous casing, and can be used at the trenchless laying of underground utilities.

There is a method of trenchless laying of pipes in the ground for RF patent No. 2344241, publ. 20.01.2009,, option 1, including education pioneer wells project axis laid communication between the working and receiving pits and simultaneous laying in her drill rod, which is connected to the working body, the subsequent expansion of the pioneer well to the design diameter of the destruction of the ground by means of the working body and the transportation of products of destruction of the flow of treatment agent through the tubing, which is placed in the extended portion of the well, combined with the working body and rotate together with it around the longitudinal axis.

The disadvantage of this method is the need for education pioneer wells, which subsequently expand to the desired diameter and then tighten the casing, which is an additional operations that reduce the performance of this method. In addition, the absence of a planting around the well in the process of expansion can lead to the collapse of the borehole walls.

The closest in technical essence and the totality of things is the only indication to the proposed method is a known method of drilling with continuous transportation of sludge on dual drill string (see reference "Drilling tool for exploration wells", Ed. by Nigeriana. M: "Nedra", 1990. 356 C.), which includes drilling the rock cutting tools with continuous removal of cuttings from the borehole bottom, transportation stream of spent working fluid under pressure through the Central channel of the dual drill string.

The disadvantage of this method is the lack of a planting around the well, which can lead to the collapse of its walls. In addition, in the process of drilling thrust and torque transmitted to the downhole projectile through the outer pipe of the double drill string, which prevents the use of non-metallic material, resistant to stress, and the use of metal dual drill string increases the weight of the equipment and its value.

Technical challenges - improving the efficiency of the method of construction of wells by combining the processes of drilling and planting around the well, increasing reliability and extending the scope of application of the method due to the simultaneous tightening of the casing, and also to reduce the weight and cost of the equipment through the use of the outer pipe of the double drill string of non-metallic material.

The problem is solved in that in the method of construction of the wells, including drilling her portacaths.odemonstrates downhole projectile, United with double the drillstring, with continuous removal of cuttings from the borehole bottom, the transportation of the sludge stream of spent working fluid under pressure through the Central channel of the dual drill string, according to the technical solution for drilling using dual drill string formed of a non-rotating outer pipe and posted it to a drill rod, the transmitting torque and axial force on the downhole projectile with the rock cutting tool, and simultaneously with drilling are tightening it to the specified outer pipe, which after completion of drilling left in the well as the tubing, while the Central channel dual drill is the drill rod channel.

The dual drill string formed by the non-rotating outer pipe and posted it to a drill rod, a Central channel which is the channel of the drill rod, which transmits torque and axial force on the downhole projectile with the rock cutting tool, allows you to apply one set of drill rods for drilling in a wide range of diameters. When this outer tube of the dual drill string can be made of different materials. For example, in the construction of wells for heat and gas pipelines obsed the flanged pipe shall be of metal, as for cable TV, water and sewer use non-metallic casing. Drilling simultaneously with the tightening of the outer pipe of the double drill string, which after completion of drilling left in the well as the tubing, excludes the operation of planting around well after her sinking, which reduces the time and allows drilling in unstable ground, not allowing the well to collapse. The proposed set of features increases the effectiveness and reliability of the method and extends the scope of its application.

It is advisable to double drill string to use outer tube of non-metallic material as the outer tube does not rotate and does not perceive effort from the drilling rig. The use of non-metallic pipes will reduce the weight and cost of the dual drill string and sets in General.

The essence of the technical solution is illustrated by the example of a particular implementation of the method of construction of wells and drawing, which shows a diagram of the method.

The method of construction of the well implemented as follows. Downhole projectile 1 lead in the percussion-rotary action. For this he passed axial F M and rotational forces from the drilling rig (not shown) through the drilling rod 2, the soybean is iannou with downhole round 1 thread. The flow of the working fluid pressure P in the face of the shell 1 are carried out through the pipe 3 stub 4 and the space between the drill rod 2 and the outer pipe 5 dual drill string connected to the downhole shell 1 Cup 6 through the thrust bearing (position not defined), which allows the outer tube 5 dual drill string to rotate together with downhole projectile 1. The cover 4 is installed on the drill rod 2 with a minimum clearance, and with a thread connected to the outer pipe 5 dual drill string. Downhole projectile 1, acting through a rock cutting tool 7 on the breed, makes its destruction, the cuttings from the borehole bottom and transporting it into the channel 8 of the face shell 1. Next, the slurry under pressure Poexhaust of the working fluid through the channel 9 of the drill rod 2, which is a continuation of the channel 8, is transported in slamboree device 10. Simultaneously with the drilling process are tightened in the hole of the outer pipe 5 dual drill string, and after sinking her disconnect from all elements and leave the well as the tubing to prevent collapse of its walls.

Rotary percussive effects on downhole projectile 1 is passed through the drilling rod 2 and the outer tube 5 dual drill string serves only to protect the walls from the vazhiny from collapse and remains slightly loaded. Consequently, the outer tube 5 dual drill string should consist of non-metallic material, for example polyethylene, asbestopluma or fiberglass.

1. The method of construction of the wells, including drilling her rock cutting tool downhole projectile connected with double the drillstring, with continuous removal of cuttings from the borehole bottom, the transportation of the sludge stream of spent working fluid under pressure through the Central channel of the dual drill string, differentthe fact that for well drilling using dual drill string formed of a non-rotating outer pipe and posted it to a drill rod, the transmitting torque and axial force on the downhole projectile with the rock cutting tool, and simultaneously with drilling are tightening it to the specified outer pipe, which after completion of drilling left in the well as the tubing, while the Central channel of the dual drill string is the channel of the drill rod.

2. The method according to claim 1, characterized in that the dual drill string using outer tube of non-metallic material.



 

Same patents:

Drilling rig // 2513970

FIELD: process engineering.

SUBSTANCE: invention relates to well boring under complex geological conditions including unstable sediments. Drilling rid comprises casing, rock crushing tool fitted therein to crush work face periphery, drilling string and air-driven hammer connected therewith. Besides it comprises inner barrel including rotary core pipe with core gripper and two interacting half-couplings. One of the latter is engaged with rock crusher while second is engaged with rotary core pipe top surface.

EFFECT: maximum yield of core material.

3 cl, 3 dwg

FIELD: mining.

SUBSTANCE: group of inventions relates to the method and device for drilling with melting for making wells, shafts and tunnels of precise size in soil, in particular, in rock, where the well base is melted with the help of the melt, and the melt of the overburden is pressed into environment, in particular, into surrounding rock loosened as a result of action of temperature and pressure, and in which it during drilling due to hardening melt a well drag is formed around a casing string formed from tubular elements. Metal in solid aggregate condition is supplied into the central groove of the lower tubular element of the casing string open upwards on top via above tubular elements, in this groove it is melted due to energy supply, and sent via channels, which stretch from the groove outside and end in the outer side surface of the tube element, into the external surrounding of the tubular element, rock melt produced under the lowest tubular element is pressed into surrounding rock to form a metal drag that surrounds the casing string by hardening.

EFFECT: continuous metal drag of high casting quality and simplified energy input for performance of melting process.

30 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method to extend a casing string in a well without diameter reduction, including well deepening to the foot of the string extension zone, expansion of the extension zone with a reamer, lowering of the additional string from profile pipes into the well into the expanded interval, fixation of its upper end in the lower previously expanded part of the casing string, and expansion of profile pipes by development of hydraulic pressure in them with their further expanding as even. Prior to expansion of the well shaft with the reamer, the lower part of the casing string is expanded by the expanding method to form a socket with an expander, the diameter of which is selected such that the inner diameter of the socket during connection of the casing and additional strings provides for their reliable and tight connection between each other without reduction of well diameter.

EFFECT: method makes it possible to extend a casing string without diameter reduction in wells, which have not been previously planned for expansion, for instance, when a string has not been lowered to the bottom during cementing, in case of a complication when drilling from under a string, as a result, to reduce material costs and to speed up the process of well construction.

4 dwg

FIELD: mining.

SUBSTANCE: device for extension of well casing string contains connection pipe installed on lower end of string and easily drilled out shoe on the end. From below connection pipe is equipped with inner technologic recess, cylindrical sleeve made from easily drilled out material and with a seat for cementing plug from above. From above, under join to casing string, inside connection pipe there is an annular groove in which a seat is tightly installed equipped with cylindrical pit from lower end. Cylindrical sleeve is made from flexible material, from below it is rigidly and tightly connected to the shoe and from above it is tightly inserted in cylindrical seat pit with possibility of lengthwise displacement. It guarantees performance of procedure for extension of casing string from below by profiled shutter without additional round-trip operations related to cleaning (shaping) of technologic recess in coupling sleeve.

EFFECT: cylindrical sleeve made from flexible material and sealing elements installed outside and inside the seat allow safety of technologic recess during casing string cementing.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: cylindrical pipe containing flexible and radially expanded upper part and equipped at its bottom with sealing gasket which can also be expanded in radial direction under action of pipe weight is used. Dimensions of the above pipe are determined so that upper section is above failed zone while the pipe bottom rests on working face of drilled well section. When the method is being implemented, pipe is introduced to the well so that its bottom is in position when it is borne against working face and leads to radial expansion of tight seal; radial expansion of upper pipe section with exceedance of its flexibility limit is performed by means of reamer so that it is tightly pressed to the well wall above failed zone.

EFFECT: improving insulation efficiency; minimising the costs.

14 cl, 8 dwg

FIELD: gas and oil production.

SUBSTANCE: device includes casing string, drilling tool with submersion bottomhole motor and fuel circulation system in the form of hollow injection pipe, spline coupling. Casing string length suffices to overlap complicated bed and is made in the form of connected sections of multipath pipes with lengthwise crimping, and features bottom adapter with injection pipe inserted tightly in the lower part and removable top adapter connected tightly to string top end in the upper part, and with injection pipe inside. Top adapter features longitudinal recesses matching splines on the external surface of process bushing inserted from top, and capable of longitudinal travel into casing string outside of injection pipe, and positioned in respective crimps of the upper part of multipath pipes. Bottomhole motor is connected rigidly to bottom adapter which features fishing tool on top for fishneck and can be removed from casing string after the fishing tool catches fishneck. Injection pipe space features ducts connected to internal space of casing string and blocked tightly by a bushing fixated in travel position, equipped with a seat for wire line ball and capable of limited travel down to open ducts.

EFFECT: extended technical possibilities of device, prevention of hazardous loads for casing string.

3 dwg

FIELD: gas and oil production.

SUBSTANCE: procedure consists in drilling borehole with bore bit connected with casing string. The casing string is set in the hole, and the bore bit is further extracted from it. A section of the hole with unstable and destructed rock is drilled from a main hole at certain pressure of fluid consumed with an expendable bit connected to the casing string in form of multi-ray expandable tube of length exceeding length of the given section This bit is lowered on a drilling string. Internal diametre of the given section is bigger, than diametre of the main borehole minimum at thickness of wells of the casing string. Upon drilling a section overpressure is created in the casing string exceeding specified pressure and sufficient for complete extension of casing string corrugations. The casing string is fixed relative to walls of hole. Further, the drilling string is disconnected and extracted to surface. A calibrating tool is lowered for final casing string strengthening to diametre equal to diametre of the main borehole. The calibrating tool is equipped with a catcher on a lower end for gripping, disconnection and extraction of bore bit.

EFFECT: raised reliability, reduced expenditures and occurrence of emergency situations.

2 dwg

FIELD: gas and oil production.

SUBSTANCE: procedure for construction of horizontal drain hole in unstable moveable rock and drilling assembly for its implementation are designed for drilling horizontal drain holes of big length in most complicated geological conditions. The procedure consists in inclusion of additional protective strings with diametres decreasing to drilling lengthwise axis and a removable vibratory-percussion device into a complex of the drilling assembly. This facilitates loading the protective string without interruption of its vibration when there is achieved maximal length of the hole with consideration of strength of connection. The protective string is stopped when it achieves its maximal length for the second time. It is sealed and the additional protective string of less diametre is concentrically lowered in it till connection with a rock destroying tool. Further, drilling is carried out with the additional protective string rotating it in the direction opposite to the rotational direction of the preceding protective string. A gap between the stopped preceding protective string and additional moveable protective string is washed through drilling string and additionally independently and continuously washed with water under pressure exceeding that one of formation. The protective string is stopped when its reaches maximal length of the hole upon vibration. A new additional string of still less diametre is lowered for successive drilling and stop operations are repeated a required number of times for obtaining required length of a hole.

EFFECT: multiple increase of horizontal drain hole length, increased drilling length of each of alternating protective strings, raised efficiency of drain complexes, increased reliability, prevention of sand ingress between protective strings.

2 cl, 4 dwg, 2 ex

FIELD: oil and gas production.

SUBSTANCE: expandable drilling assembly consists of cylinder shank end, of head reinforced with hard alloy insertions and containing fill pieces reinforced with hard alloy insertions. The fill pieces are set freely and travel in radial and axial directions in radial guiding slots made at angle from periphery to centre of the drilling assembly head. Also, generatrices of the radial guiding slots are rectilinear, while walls of the guiding slots are not parallel to each other.

EFFECT: raised efficiency and stability of borehole drilling, reduced labour input of borehole drilling and simplified design of expandable drilling assembly raising its reliability.

4 dwg

FIELD: oil and gas industry.

SUBSTANCE: there performed is borehole sinking, lowering and attachment of casing and production strings. The first part of the well bore - direction is drilled with diametre of not more than 300 mm, the second part - conductor is drilled with diametre of not more than 220 mm, the third part is drilled with diametre of not more than 160 mm. As drilling solution during drilling of the direction, there used is clay solution with density of 1.12-1.20 kg/m3, during drilling of conductor and the main bore - service water with density of 1.00-1.09 kg/m3. Flow rate of service water is determined with lost circulation zones exceeding the service water absorption. Opening of production interval is performed by using service water with addition of mixture of surface-active substances, "МЛ-81 Б" grade, in quantity of 1-3%. After drilling the well bore from the bottomhole to the mouth, or in case of lost circulation zone, to lost circulation zone, is filled with clay solution with density of 1.12-1.20 kg/m3. Logging investigations are performed. Drilling installation is lowered, water service is pumped and the productive formation interval is passed by means of rotary bit for 2-4 times with speed of 20-30 m/hour. As production string there used is string with outer diametre providing the thickness of cement sheath wall of not less than 16 mm.

EFFECT: reducing the costs of well construction.

2 cl

FIELD: construction.

SUBSTANCE: method includes formation of a pioneer well along the design axis of the installed bundle of pipes between working and receiving pits and simultaneous installation of a drilling bar in it, which is connected to the working organ, subsequent expansion of the pioneer well to the design diameter by soil damage with the help of the working organ, simultaneous transportation of damage products with the help of a cleaning agent into the space between the expanded pioneer well and the bundle of pipes and installation of the bundle of pipes in the expanded pioneer well.

EFFECT: increased reliability of installation of a bundle of pipes without complications related to sags of surface above a well.

3 dwg

FIELD: construction.

SUBSTANCE: method includes submersion of a pipe into soil with an open end, formation of a soil core in it and its removal from the pipe with the supplied fluid medium by means of breaking and squeezing out in parts. The fluid medium is supplied into the soil core at the outer side of the submerged pipe, using the channel of connection between the pipeline for supply of the fluid medium and the inner cavity of the submerged pipe.

EFFECT: increased efficiency due to reliability of soil core removal by means of creation of conditions to preserve integrity of a broken part of the soil core.

5 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: device includes a pipe-destructing working element with two disc knives, a reamer for enlarging the well diameter, an attachment device of a new plastic pipeline and a tie-rod element in the form of a rope with elements installed on it. Each element installed on the rope is made in the form of a detachable sleeve with three equally spaced radially oriented cylindrical rods, in each of which a fork with a ball is installed so that fixed radial movement is possible. A radial slot is made throughout the length of detachable sleeve between adjacent cylindrical bars; a retaining screw is inserted in a threaded hole in the middle of the above radial radial slot. The pipe-destructing working element is made in the form of an assembled two-section framework, the centre of the rear end face of which has a spherical slot. The reamer is made in the form of an assembled two-section flattened cone, the centres of both end faces of which have spherical slots The rear end face of the pipe-destructing working element and the front end face of the reamer are connected by means of a hinge joint consisting of a pin, on both ends of which balls are installed by means of a thread The rear end face of the reamer and the attachment device of a new plastic pipeline are connected by means of a hinge joint consisting of an additional pin, on one end of which a ball is installed by means of thread and inserted in the spherical slot of the rear end face of the reamer, and the other end of the additional pin is installed in an axial hole of the attachment device of the new pipeline and fixed with a nut

EFFECT: improving reliability of hinge joints and a tie-rod element at passage of curved sections of pipelines.

9 dwg

FIELD: transport.

SUBSTANCE: proposed method comprises driving the trench to accommodate therein the protective jacket to receive the pipeline thereafter. Before driving said trench, in front of motor road or railway said protective jacket is placed to accommodate rotary screw with detachable cutting element at its end face directed toward the road. Cutting tool diameter equals protective jacket OD. Screw length exceeds that of protective jacket, screw extension being directed from the road. Screw shaft is engaged with rotary drive placed at slide rails provided with semicircular ledge arranged atop said rails and directed toward protective jacket above said screw, its end and jacket ends are jointed together by flanges to be bolted together. Slide rails are to be fixed relative to drive by "П"-like bracket secured at drive frame to thrust against slide rails rear end and to surround them from both sides. Then, screw drive is switched on to displace slide rails with revolving screw and protective jacket toward the road so that said jacket penetrates into soil to get completely buried therein. Then, said cutting element and bolts are removed from screw end. Then said screw is withdrawn from said jacket to fit main pipeline section therein.

EFFECT: safe and reliable laying, lower costs and labor input.

5 dwg

FIELD: construction.

SUBSTANCE: installation comprises a frame, a carriage with a control unit arranged on it with a technological adapter, a hydraulic cylinder connected by the body to the frame, and with the stem to the carriage, at the same time the frame has guides for carriage rollers. The frame is made of the carriage frame and the hydraulic cylinder frame connected to each other.

EFFECT: increased reliability of operation and reduction of time for installation assembly and disassembly, increased volume of working space in a well and increased efficiency of performed works due to placement of a hydraulic cylinder with stem length that is larger than in a prototype outside the limits of the well, and whenever it is required to increase force characteristics.

3 cl, 2 dwg

FIELD: construction.

SUBSTANCE: method in accordance with the first version includes formation of a pilot well along a design axis of the installed utility, expansion of the pilot well to the design diameter by damage of soil with the help of a working element connected with a drilling rod, and transportation of products of damage by means of a pipeline connected with a free end of the working element as the latter rotates around the longitudinal axis, for this purpose pressure is pulled at the open end of the pipeline below the atmospheric pressure with the help of a vacuum-forming device. The method in accordance with the second version differs from the method in accordance with the first method by the fact that transportation of damage products is carried out with the help of a drilling rod.

EFFECT: increased efficiency of a working process due to usage of process equipment, principle of operation of which provides for rational use of installed capacity.

3 cl, 2 dwg

FIELD: mining.

SUBSTANCE: device comprises a body, a working organ, a mechanism of tunnelling direction control, which is made in the form of a tip installed in the front part of the body with the possibility of angular displacement, connected with a piston, a spring, a chamber, connected with channels for energy resource supply, and a navigation device fixed in the body, besides, the spring with its rear end is fixed on the front end of the piston, and with the front end - on the body, at the same time the read end of the piston contacts with the specified chamber.

EFFECT: arrangement of a tunnelling direction control mechanism inside a device body prevents negative effect of soil in process of well tunnelling.

3 cl, 4 dwg

FIELD: construction.

SUBSTANCE: device for formation of wells in soil by the method of piercing comprises a hollow working tip of conical shape fixed on the front end of a pressure rod in direction of piercing and a feeding mechanism. In the wall of the hollow working tip there are holes, and on its outer surface there is an elastic impermeable shell fixed to the top and the base of the working tip. The inner cavity of the working tip is tightly connected to the hollow pressure rod, the other end of which is connected with a source of pulsating liquid or gas.

EFFECT: increased efficiency.

1 dwg

FIELD: construction.

SUBSTANCE: device for trenchless laying of pipelines by piercing comprises a working tip of conical shape, a vibrator of circular oscillations of which is arranged in the form of an electric motor with a hollow shaft, the stator of which is fixed in the working tip, and the rod is installed inside the hollow shaft, having a displaced centre of gravity relative to the axis of rotation, at the same time the rod is fixed on the flange, which is mounted on the front end of the laid pipeline along the piercing direction. The rotation device is arranged in the form of a cover with a hole, rolling in displaced surfaces of the rotating eccentric reciprocally moving along the longitudinal axis of the rod.

EFFECT: higher accuracy of pipeline laying.

3 dwg

FIELD: construction.

SUBSTANCE: device for trenchless installation of pipelines, comprising a guide body arranged on telescopic supports with a cut upwards, made of a 2/3 diameter of the pipe in the form of a hemisphere reinforced with stiffening ribs, having inside the welded thrust plates at the distance equal to the length of the power hydraulic cylinder stem, windows for soil discharge, stop wedges, a grip, differing by the fact that a carriage made as telescopic of double-sided action, having thrust sliding plates, an opening for soil transportation, is arranged inside the guide body transferring the force of power hydraulic cylinders installed on the telescopic carriage of the double-sided action.

EFFECT: higher efficiency of labour, expanded range of installed pipelines diameters, lower labour intensiveness.

10 dwg

FIELD: construction, applicable for trenchless laying and replacement of underground pipe-lines.

SUBSTANCE: a reciprocating striker is positioned in the casing of the pneumatic percussion mechanism. The air-distributing system of the mechanism includes the front and rear working chambers, inlet and exhaust valves and a fixture for closing and opening of the exhaust channels made in the form of a spring-loaded end face stopper coupled to a tractive member. At actuation of the pneumatic percussion mechanism, before the supply of compressed air, the exhaust channels are closed, they are opened after the inner cavities of the pneumatic percussion mechanism are filled with compressed air.

EFFECT: provided automatic cyclic action of the pneumatic percussion mechanism.

3 cl, 3 dwg

Up!