Method of pipe driving in soil
SUBSTANCE: proposed method consist in driving the pipe in soil, forming the soil core in pipe face section, forcing said core by air pressure portions in annulus, cutting off the core portions to make the chamber ahead of soil core portion by displacing the soil duct in the axis of submergence. Said soil duct is composed by submersible pipe to be displaced in submergence axis by static force. Soil core portions transfer is conducted by creating vacuum at submersible pipe external end.
EFFECT: lower power intensity, lower costs.
3 cl, 3 dwg
The technical solution relates to mining and construction technology and can be used for trenchless installation of underground utilities.
The known method of trenchless laying of underground utilities by the RF patent №2229566, E02F 5/18, E02D 7/10, F16L 1/028, publ. 27.05.2004, consisting in driving a pipe into the ground at the desired length in sandy loam soil plots no longer than 9, and in the clay not more than 7, its inner diameter, while its separat focus, remove the soil from the first pipe section provide her a shock, stop shock on the tube and disconnect the emphasis from the pipe after driving each plot.
The disadvantage of this method is the poor performance in the limit to zero by the end of the process, the volatility process and the inability to fully clean the pipe from the soil, because as cleaning the soil is redistributed along the entire length of the pipe, the height of the soil layer is reduced, so the friction force, providing the movement of soil on the pipe are reduced.
The closest in technical essence and essential features is a method of trenchless laying of pipelines in the ground (see Nyakishenyi and Veenai. Drilling horizontal and vertical wells shock method. M: "Nedra". 1984, p.36-37), which consists in immersing the pipe in the ground with an open front tor the Ohm, forming at its downhole part of the soil core, which is transported by a built-in dip tube hydraulic fill pipe line portions by the pressure of air entering through the annular space, the cut-off portions of the soil core and the education of the camera before the portion of the soil core by displacement of the hydraulic fill pipe line along the axis of the immersion by air pressure.
The disadvantage of this method is the most anagreement process of immersion of the pipe due to the significant joint drag submersible rough and soil core in the hydraulic fill pipe line due to the large degree of compression, which increases the friction of the soil core on the inner surface of the pipe. The presence of the reciprocating motion of the hydraulic fill pipe line in abrasive soil environment can lead to jamming of the hydraulic fill pipe line in any position that will lead to the violation of the process of detachment and transportation of portions of the soil core. In addition, the reciprocating movement of the hydraulic fill pipe line complicates the design that implements the method.
Solved technical challenges are to reduce the energy intensity of the process of immersion pipe by reducing drag submersible pipes, to improve the reliability of separation and removal of portions of the soil core from the dip tube by moving it along the axis of the borehole from the bottom is in reducing the cost of the equipment, implements the method, through the use of vacuum instead of excessive pressure.
The problem is solved due to the fact that in the method for trenchless laying of pipes in the ground, which consists in immersing the pipe in the ground, the formation of the soil core in the downhole portion of the immersed pipe, transporting it through the hydraulic fill pipe line portions by the pressure of air entering through the annular space, the cut-off portions of the soil core and the education of the camera before the portion of the soil core by displacement of the hydraulic fill pipe line axis immersion, according to the technical solution as used submersible hydraulic fill pipe line pipe, which move along the axis of the immersion static power, and transportation portions of the soil core is carried out by creating a vacuum in the outer end of the dip pipe.
The use of hydraulic fill pipe line dip tube reduces drag due to the absence within it of hydraulic fill pipe line, and transportation portions of the soil core using a vacuum eliminates the need for compressed air to the downhole end of the immersion pipe: it is enough to have a relationship downhole end of the dip tube with the atmosphere. In addition, the cost of installations for creating a vacuum are much cheaper than similar units on the creation of excess pressure at the same flow rate.
it is Advisable in the annulus simultaneously with the immersion tube to form longitudinal channels using one or more local expanders with holes, which this chamber is connected with the annular space, mounted on the downhole end of the dip tube. Local expanders displace soil in the annulus to form longitudinal channels connecting the chamber with the atmosphere. This will increase the reliability and speed of transportation of portions of the soil core at the expense of a greater inflow of atmospheric air into the chamber.
It is after displacement submersible pipe axis immersion to make it rotate around this axis. Holes in the local extender can become clogged with soil. The specified rotation submersible pipes will allow you to communicate the chamber with the atmosphere over the whole cross section of the longitudinal channels formed by the local extender. This will increase the reliability and speed of transportation of portions of the soil core at the expense of even greater inflow of atmospheric air into the chamber.
The essence of the technical solution is illustrated by examples of specific implementations of the method and the drawings figure 1-3.
Figure 1 shows a diagram of the method for trenchless laying of pipes in the ground.
Figure 2 shows a fragment of a scheme of implementation of the method with the local extender to the downhole end of the dip pipe.
Figure 3 shows a section A-A in figure 2. The arrow indicates the direction of rotation.
The method for trenchless laying of pipes in the ground implement the following way.
Submersible pipe 1 (hereinafter pipe 1) open end immersed in the soil by any known method (pushing force F, shock, etc). The soil is included in the inner space of the pipe 1 and forms the earth core 2 (hereinafter - the core 2). Increasing the length of the core 2 is formed dirt tube, the dip tube 1 slows down until it stops. To eliminate dirt tube pipe 1 is shifted along the axis of the immersion away from the bottom for some distance. For this purpose, the pipe 1 is mounted the stop 3, the transmitting pipe 1 static power from a source 4 static forces, for example, hydraulic cylinders, mounted as shown in figure 1. Offset pipe 1 leads to a gap portion of the core 2 from the soil mass and formation chamber 5 freely from the pipe 1 space well. Using a vacuum pump 6 on the outer end of the pipe 1 create a vacuum and atmospheric air in the annular space 7 penetrating into the chamber 5, creates pressure on the core portion 2 around the pipe section 1. Under atmospheric pressure portion of the core 2 begins to move through hydraulic fill pipe line in the form of a dip pipe 1 to hit cerapiinit 8 mounted on the outer end of the pipe 1. Then cerapiinit 8, the vacuum pump 6, the stop 3 and the source 4 static force is removed and the process of immersion pipe 1 resume.
For more reliable with the connection chamber 5 with the atmosphere at the downhole end of the pipe 1 can assign one or more local extender 9 holes 10 (2 and 3). Local expanders 9 displace soil in the annulus 7 and form the longitudinal channels 11 through which atmospheric air through the openings 10 will get in the chamber 5. Because the local extender 9 are only a few places on the perimeter of the cross section of the pipe 1 and the dimensions of the minor (figure 2 and 3 they are shown in an enlarged scale for clarity), then drag pipes 1 as a whole will increase slightly, and the presence of longitudinal channels 11 will increase the reliability and speed of transportation of portions of the core 2.
The rotation of the pipe 1 (Fig 3) after its axial displacement will also increase the flow of air from the atmosphere into the chamber 5. In this case, the local extender 9 will be displaced in the direction of the circumference and discover all the cross-section of the longitudinal channels 11. This will ensure the connection of the atmosphere and the chamber 5 through the whole cross section of the longitudinal channels 11 and not only through the holes 10.
1. The method for trenchless laying of pipes in the ground, which consists in immersing the pipe in the ground, the formation of the soil core in the downhole portion of the immersed pipe, transporting it through the hydraulic fill pipe line portions by the pressure of air entering through the annular space, the cut-off portions of the soil core and the education of the camera before the portion of the soil core by displacement of the hydraulic fill pipe line axis immersion, featuring the the action scene, that as used submersible hydraulic fill pipe line pipe, which move along the axis of the immersion static power, and transportation portions of the soil core is carried out by creating a vacuum in the outer end of the dip pipe.
2. The method according to claim 1, characterized in that the annulus simultaneously with the immersion pipe form the longitudinal channels using one or more local expanders with holes, which this chamber is connected with the annular space, mounted on the downhole end of the dip pipe.
3. The method according to claim 2, characterized in that after the displacement of the submerged pipe along the axis of the immersion is carried out by its rotation around this axis.
SUBSTANCE: bridging pieces are installed on pipeline, which are connecting uncut pipeline pieces with each other and with defective segment. At the ends of cut out defective pipeline segment, grounded fireless pipe-cutting machines are mounted. Defective segment being cut is fixed by mean of hoisting tackle. Then, pipeline is cut simultaneously at both ends of defective segment by cutting machines with rotational speed of cutting tools not exceeding 60 rpm and with radial movement of cutting tools at speed not exceeding 30 mm/min. During pipeline cutting, wedges made of intrinsically safe material are driven into formed incisions at intervals of 250-300 mm. After that, cut out pipeline segment is dismantled using hoisting tackle, and prefabricated pipe is installed on cut out pipeline segment and ends of pipe is connected with pipeline ends by welding.
EFFECT: method simplification, higher method efficiency and safety, higher reliability of repair assembly being created.
4 cl, 1 dwg
FIELD: oil and gas industry.
SUBSTANCE: method includes installation on the damaged pipe section of a cylindrical coupling having at least one input tube and at least one output tube forming an annular gap between the inner surface of the coupling and outer surface of the pipeline, sealing of the coupling faces at the pipeline and delivery of composite material into the above annular gap through the input tube of the coupling until it appears in the output tube of the coupling. At that before installation of the coupling its inner surface and the surface of the damaged pipeline section are subject to shot blasting. The coupling is installed so that it forms the annular gap with a size of 6-40 mm. Shot blasting is made by abrasive material with particle size of 0.5-2.5 mm under air pressure of 0.6-0.8 MPa and a distance from the output of a shot-blasting machine nozzle up to the treated surface equal to 200-300 mm.
EFFECT: improving operational reliability of the repaired pipeline section and economic feasibility of the method.
7 cl, 4 dwg
SUBSTANCE: invention relates to pipeline transport and may be used in erection of pipelines in crossings via water obstacles. In the proposed method the underwater pipeline is fixed by links with length l and distance between them L, values of which are produced by calculations. Then the pipeline is filled between produced links. Afterwards the remaining sections of the pipeline are filled. Links on the pipelines may be temporary reinforced concrete or metal balance weights at the distance k between them, the value of which is determined by means of calculations.
EFFECT: rationalisation of filling, with lower probability of pipeline leaving its design position.
2 cl, 3 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil and gas industry, in particular, to methods for repair of coil tubing and can be used for liquidation of cracks, holes, ruptures and other defects of coil tubing where logging cable is placed at preproduction (repair) depots without violation of the cable isolation and integrity. The invention essence consists in that the coil tubing together with the logging cable is wound onto a drum and delivered to the repair depot, unwound and the coil rubbing section with defects is cut at a special-welding skid, removed and replaced with a repair kit representing a part of the coil tubing; thereafter repair kit is welded to theend surface of the cut coil tubing. Then the cable is washed from the coil tubing, the repair kit is cut, ends of the cut coil tubing section are matched and welded and then the removed logging cable is washed into (passed through) the coil tubing wound to the drum. At that stage repair process is over and the drum with the wound coil tubing and logging cable inside is transported to the well.
EFFECT: improving efficiency of repair.
SUBSTANCE: method includes erection of shafts, driving a tunnel with arrangement of lining, installation of tiers of protective casings from polymer or steel pipes, their fixation against longitudinal displacement and placement of working pipelines inside appropriate protective jackets. In the tunnel they form a support surface, arranged above the lower tier of pipeline installation. On the support surface along the tunnel they install a rail track, using which, pipes of protective jackets are delivered to the tunnel. From a wagon site, using a crane-manipulator, they install onto supports at both sides from it and further weld pipes of protective jackets of the second tier. Then metal brackets are mounted around protective jackets of the second tier, using metal brackets, they install onto supports put onto them and further weld pipes of protective jackets of the third tier. After that they dismantle the rail track and install remaining protective jackets from pipes on a free space with installation of working pipelines in protective jackets. The space of the tunnel between the protective jackets is filled with sand pulp.
EFFECT: simplified process of pipeline installation.
FIELD: machine building.
SUBSTANCE: in the proposed method a weighing agent is installed on a pipeline in the form of a "П"-shaped box, comprising a seat-like part interacting with the pipeline, front and side walls, coupled in the bottom part with the bottom sections of the box. Then ballast of at least two types is filled into the box. At the same time ballast with higher specific weight is filled into the bottom part of the box.
EFFECT: lower centre of weighing agent gravity, higher stability and reliability of a weighing agent as it is filled with ballast, lower costs for transportation.
SUBSTANCE: claimed is the set of inventions: clamp for stacker tower, stacker and method of stacking with the help of stacking ship. Clamp 9, 10 comprises support frame 12, 14 and at least two clamps 13 arranged for simultaneous gripping and releasing of long element 2. Every said clamp 13 has at least two opposed clamping device 15 and self-adjusting mechanisms 19, each being arranged between appropriate clamping device 15 and frame 12, 14. Said stacker comprises stacker tower 4, first and second clamps 9, 10 connected with said tower. Method of stacking consists in clamping of long element 2 by clamp 9, 10 sliding along stacker tower 4 and performing correction motion in direction parallel with axis A of clamp 10 relative to clamp 9 at simultaneous grip of continuous long element 2 by clamps 9, 10.
EFFECT: reliable retention of long elements without slip.
13 cl, 7 dwg
SUBSTANCE: invention relates to ship building, particularly, to marine ships intended for laying pipelines, flexible elements and underwater structures in arctic conditions by S- and J-processes. System of submersion of S-method allows laying the steel pipes and flexible elements. For this horizontal part of submersion system extends from ship fore to vertical line of upper deck intersection with aft transverse hold bulkhead. It comprises auxiliary service line to make stalks of two or three pipes and first main service line to assemble the first steel pipeline. Curved part of said path features radius making at least 0.7 of the ship maximum length and consists of open slip, tunnel closed at side and from above, aft stringer section turning about transverse axis located at least at the depth of 0.75 of ship draft in load waterline at, at least 0.15 of the ship maximum length. Midship coefficient at the area of said transverse axis does not exceed 0.45. This ship is equipped with the system of submersion by J-method of steel reinforced concrete and unconcreted large-diameter pipes (up to 1400 mm) and thickness of up to 27 mm, underwater structures and carousel for flexible element. Forked aft accommodates engine and boiler compartment connected with aforesaid submersion path with equipment loading/unloading hatches, after compartment with living and service rooms, takeoff-landing platform with hangar for helicopter and drone, and detachable modules to service underwater TV-controlled apparatus, divers complex and that of hyperbaric welding. Positioning system comprises after fore equipment of anchorage and system of dynamic positions. Besides it is equipped with pontoons and crane for mooring and load transfer operations in ice.
EFFECT: higher efficiency and safety.
7 cl, 7 dwg
FIELD: machine building.
SUBSTANCE: first borders of the seismotectonic area are defined, and a trench is dug with gentle slopes, the axis of which in plan corresponds to the axis of the pipeline. Then a water-impermeable shell is laid onto levelled bottom and slopes of the trench, and the shell is made from elastic material, on top of which they fill a cushion from a sand filler, afterwards a pipeline is laid onto the cushion, the trench is filled with the sand filler to the height above the pipeline of less than 0.5 of the external diameter of the pipeline. The upper edges of the shell are connected to form a closed shell around the sand filler, and via water-impermeable links that are tightly connected with the pipeline and the shell, they withdraw the pipeline from the sand filler outside the borders of the seismotectonic area. At the same time in the lower part of the sand filler they install a drainage pipe, which is hydraulically communicated with the emergency reservoir, and the pipeline is equipped with a pressure sensor in the pore space of the sand filler and two locking devices, which are arranged on the pipeline, one beyond each border of the seismoactive area. Between the borders of the seismotectonic area the pipeline from outside may be equipped with a layer of specified thickness from foamed material with tightly closed pores.
EFFECT: increased operational reliability of a pipeline, efficient collection of information on leakage of a product from a pipeline within a seismotectonic area and prevention of product spread in adjacent soil areas.
8 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: pipeline is mounted on a deck of a pipe laying ship and laid at the water reservoir bottom. A column of two machines moves along the pipeline: a pipe burying barge and a trench burying machine at some distance from each other, which is technologically substantiated, but not more than 100 metres. The pipe burying barge excavates a trench immediately under the pipeline and lays the developed ground into accurately shaped dumps on both sides; the pipeline is lowered into the trench under action of dead weight. The trench burying machine displaces the formed dumps into the trench and covers the laid pipeline with the ground earlier extracted from under it. Machines operate in an automatic mode, remotely controlled and provided with energy along cables hung on floats from an underwater or surface basic ship. The pipe burying barge is made in the form of two working elements of a back-acting shovel, which are mirror-like located relative to each other and each of which has the possibility of being turned in a horizontal plane and laterally inclined by means of horizontal and inclined hinges. Reactive forces of the working elements are closed on a common frame and not transmitted to a travelling gear.
EFFECT: improving efficiency and reducing costs at performance of works.
12 cl, 11 dwg
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
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.
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.
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.
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
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
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
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.
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.
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