The method of construction of the horizontal or inclined drainage wells in flooded sandy horizons installation for its implementation, the filter pipe (options)

 

The invention relates to the mining industry, in particular to methods and devices for the construction of horizontal and inclined drainage wells in sandy aquifers in a wide range of hydrostatic pressures. Provision of regulated sand at high hydrostatic pressures, reducing construction time, increase the depth and length of constructed wells, improving manufacturability, design simplification, improvement of environmental and safety way, reducing energy consumption, improving reliability, reducing pressures on Executive bodies, protection of the filtering surfaces achieved by providing the possibility of drilling external filter column by protecting the filter elements of the latest and elimination of free messages internal cavity of the column with artesian aquifers, the use of a compound of the mechanical shutter, one part of which is the rear conical surface of the bit with the crown for the purposes of the regulation of removal of sand from the well. 4 ad and 4 C.p. f-crystals, 5 Il.

The invention relates to the mining industry, in particular to methods of building control is to be applied in the construction of drainage wells from the pits and mine shafts in complex hydrogeological conditions, namely, in sandy aquifers in a wide range of hydrostatic pressures.

The known method and device for the construction of horizontal wells under the beds of rivers nadavlivanie filter tubes representing a unit consisting of the filter columns and hydraulic jacks with which the filter casing without rotating crush in the aquifer, with some rocks through the holes in the head that is installed on the front of the filter is taken out of the reservoir water in the filter column. The method is characterized by the application of a high axial forces (up to 3000 kN) and is applicable only in gravelistoe and coarse-grained heterogeneous aquifers. The disadvantages of the method are: limited scope, the intense curvature of the wells, unmanaged sand from the reservoir [P. A. Antoniewski, G. A. Razumov. Horizontal wells, M., 1970. s].

There is also known a method for the construction of drainage wells by drilling of cinemafilter of wells with diameter of 800 mm and device for these purposes, with a depth of drains up to 50 meters, Construction of drains is carried out using special cinemafilter, which simultaneously drill string and filter. The rotational rate is 60-the CSOs posted by the actuator, the gearbox and the rotator-pusher. Cinemafilter served from the surface to a specific container. Oil station and the remote control is placed on the surface.

The disadvantages of this method are the high load, the inability to control the spatial position of the axis of the borehole, depth constructed wells, the volume transported out of the reservoir sand. The proposed method of drilling cinemafilter showed that the auger at 100% filling space steadily cannot work. He starts to work like a screw. Uncontrolled sand causes the decompression zone in the reservoir and the curvature constructed wells [I. F. Oksanych, C. S. Beresnev, A. B. Gordon and other Drainage fields in the construction of iron ore mines. - M., Nedra, 1977, S. 88].

In the prior art there is also known a method of construction of drainage wells and device for its implementation.with. No. 1682547, according to which the destruction of the breed (strong fractured rock) perform two associated with the inner and outer columns of pipes rock cutting elements during the application of torque to each of the columns and the same thrust feed. Improving performance and reducing power consumption when busway between a rock cutting elements of internal and external columns, pipes, then disconnect the external casing from the outer rock cutting tool and carry out the destruction of breed at equal angular speeds of rotation of the rock cutting elements, while providing rotation of the inner rock cutting element with a greater angular velocity than the angular velocity of the outer columns, for which the inner column pipe installed with the possibility of translational movement with respect to the outer column and the inner surface of rock cutting element exterior columns have grooves for engagement with the projections made on the outer surface of rock cutting element of the inner pillar (A. C. 1682547, 07.10.91 BI 37). This method and device unacceptable for the construction of wells in flooded sand.

The most intimate and selected as a prototype for the proposed method and device for its realization are drilling method and equipment filters horizontal and slightly inclined (up to 10%) of the wells in the irrigated desert under the protection of the casing installation, radial drilling UV-130, including the drilling rig, oil station and remote control. The remote control and the drilling rig is mounted inside the shaft of the well on production by polkadot both rotators are hydraulic motors. Both rotator can work independently from each other. External column equipped with a cutting element, the inner column is equipped with a special rock cutting tool to overlap the outer end of the column for a period of building and landing in the filter column. The diameter of the rock cutting element is larger than the diameter of the outer column and when drilling 1.5-2.0 cm ahead of the outer column. The construction of the wells is carried out by the internal column (screw) under the protection of the external columns (casing), filed simultaneously, both columns are coaxially arranged relative to the axis of rotation. Drilling are cyclically on the section length of the screws and, accordingly, the length of the working section of pipe. The rotation of each column of pipes provide individual rotators.

The opening of the reservoir provide rock cutting element in the form of special crowns installed on the auger column, with drive, with which you can change the gap between the disc and the end face of the outer protective casing and within certain limits, to regulate the removal of sand from the reservoir. The connection of the atmosphere layer is maintained through the annular space between the protective and screw columns.

External column pipe C is the auger column is extracted, in the borehole coaxially of the outer column to the bottom insert the filter column. After landing filter column outer column is extracted, and the well is ready to work [L. Q. Cochelin, C. S. Kuzkin, F. C. Malackowski, I. I. Bondarenko and other Provisional guidelines on technology facilities radial drainage wells drilling rig ULB-130, , Belgorod, 1981, S. 19].

With this method of drilling is opening pressure reservoir filled utopische mixture. With significant pressure of water in the reservoir (more than 3 m water column) management for the removal of sand from the reservoir is almost impossible, resulting in the decompression zone and, respectively, to the curvature of the well.

Disadvantages are also significant time costs associated with removing the outer protective role of the column after installing a filter columns, as well as a high degree of destruction to the filter surface. This possibility is explained by the fact that in terms of compression columns protective sand removing her perform only rotation limiting axial effort back. Describes the rotation in terms of the compression leads to the contact roughness of the inner surface of the outer Coco makes the process unreliable, time-consuming and laborious. The extraction speed of the working column is comparable to the speed of drilling.

In practice, water filter columns are very important features of its design decisions based on the real conditions of their operation.

The main structural types of filters, which is widely used in the practice of drainage works are: perforated, wire, mesh, frame rod and gravel (frame-printed).

Thus, the prior art known, for example, design of filters with grids on the basis of perforated pipe made of metal and polyethylene. Pipe with a diameter of 100 mm when the diameter of the holes 10 mm number of holes is 800 to 1 m In diameter pipes 125 mm and the hole diameter 12 mm - 700 1 m Bonding grid and winding a wire helix is along the longitudinal edges, made of wire with a diameter of 4-5 mm, Such ribs are installed by welding to steel frame or thermal puncture heated cones wire in the frame. The disadvantage of this design is that the winding wire coils on pipes of metal leads to their deformation and displacement of the turns of the helix during transportation and descent by fine-grained Sands apply the filters block type, consisting of a metal frame, which put the finished blocks, made of ceramics, porous concrete or glued grains of gravel. Reducing the size of through holes on the filter surface of the filter when pumping of fine Sands leads to a large input resistance, reducing the effectiveness of dewatering.

In this regard, the pumping of fine Sands, the most important filters with gravel and sand sprinkled downloaded from the surface that does not apply this kind of filters for dewatering horizontal drainage wells [Drainage fields in the construction of iron ore mines. - M., "Nedra", 1977, I. F. Oksanych, C. S. Beresnev, A. B. Gordon and others, S. 58].

Also known filter element radial intake along.with. 969841 (30.10.82 BI No. 40), perforated, with filter pipe is assembled from elements with different duty cycle, adjacent stepwise in the direction from the head to the mouth, ensuring equality of average velocities through the holes of each element.

The main part of analogues unusable when using them as workers in the process of rotary drilling by wissnet to declare and selected as a prototype for filter pipe is perforated filter including the filter tube with the hole. This type of filter is used for dewatering of aquifers, composed of gravel, coarse sand, gravelistoe sand with particle size from 1 to 10 mm and with a predominance of particles with a particle size of from 2 to 5 mm (the number of such particles is more than 50%). Holes are made round, the hole diameter of 5-10 mm size Reduction of through-holes on the filter surface of the filter causes an increase in the input resistance and the decrease in the efficiency of water [Drainage fields in the construction of iron ore mines. - M., "Nedra", 1977, I. F. Oksanych, B. S. he, A. B. Gordon and others, S. 58-59].

The objective of the invention is to develop a method of construction of the horizontal or inclined drainage wells, allowing you to safely open sandy aquifers in a wide range of hydrostatic pressures without causing environmental damage and the development of technical means for its implementation, including the creation of a strong filter pipes protected with filter elements does not increase the resistance of the filter tube in rotary-linear motion.

Technical results which can be obtained when implementing iSky pressures;

- extension of the operating range of hydrostatic pressures;

- reduction of construction time;

- increasing the depth and length of the constructed drainage wells;

- improving the manufacturability;

- improving the environmental and safety way;

to install, implements the method

- elimination of free messages in the internal cavity of the outer column with artesian aquifers;

- simplification of the structure;

- increased productivity;

- reduction of energy intensity;

- improved reliability;

- reducing pressures on the Executive bodies of the installation torque, axial forces);

for filter tubes

- enhanced functionality;

- allow the use of filter tubes in confined sand aquifers;

- protection of the filtering surfaces from mechanical impact.

The solution of the stated problem and the achievement of the expected technical results for the inventive method and installation for its implementation became possible due to the fact that in the known method of construction of the horizontal or inclined drainage wells in flooded sandy rocks, including drilling due to the transmission axis at which ement for rock breaking and overlapping the outer end of the column for periods stop for extension tubes and operation regulation of the removal of rock in the form of sand, the flow of washing fluid, removal of destroyed rock with the washing liquid, the equipment is constructed well filter pipe, drain water drained through the inner cavity of the filter pipes, equipment constructed wells of the filter tubes is carried out in the drilling process by including in the external column filter pipe and the drill head having a continuous cylindrical surface, the outer diameter of which amounts to 1.1 to 1.15 external diameter of the filter tube, and the inner column as element for rock breaking and overlapping the outer end of the column set the bit with the back side having a conical surface, and crown, the drill head to form a hydraulic chamber by separating it from the annular filter space sealer with a non-return valve, with the length of the hydraulic chamber defined by the formula

l=d tg,

where l is the length of the hydraulic chamber;

d - diameter of the drill head;

- the angle of internal friction of sand under water,

the hydraulic chamber is filled, creating a hydraulic lock, the washing liquid to a pressure close to or equal Plast, drilling done by sushennoy breed carried out with the washing liquid through the check valve sealer, which set to open at a pressure close to or equal Plast, the disposal of drained water runs through the cavity of the outer columns, removal of rocks in the form of sand regulate, by changing the size of the gap between the conical surface of the internal cavity of the cylindrical ring, which is one part of the additional composite mechanical shutter, installed with an emphasis in the end face of the cylindrical recess made in the internal surface of the drill head and the conical surface of the back side of the bit, which is another part of this additional composite mechanical shutter by moving horizontally not less than one of these parts relative to the other, under the condition of equality of the angles, educated forming these surfaces and the angle of the effective cutting soft rock, in the preferred case of execution of the method, the rotation of the columns is carried out in antiphase, and also due to the fact that in the known installation for the construction of horizontal or inclined drainage wells in flooded sandy horizons, including remote control and the drilling rig, which contains the external rotator columns, internal rotator of the column, coaxial in the space, cutting edge on the end face of the outer column and an element for rock breaking and overlapping the outer end of the column for the period stops for extension tubes and exploitation, external column includes filter pipe and provided in the downhole portion of the drill head having a continuous cylindrical surface, the outer diameter of which amounts to 1.1 to 1.15 external diameter of the filter tube, and inside the drill head has a sealer with the ability to create in the field of sealer - end exterior columns hydraulic chamber with pressure fluid, close Plast or equal to a length defined by the formula

l=d tg,

where l is the length of the hydraulic chamber;

d - diameter of the drill head;

- the angle of internal friction of sand under water,

sealer is equipped with check valves to the output of destroyed rock from the face with a stream of washing fluid configured to open under fluid pressure in the hydraulic chamber, close or equal Plast, and from a face in the inner surface of the drill head is cylindrical recess, the depth and the length of which is sufficient to establish the reference in the end of this cylindrical in the interior cavity in the shape of a truncated cone, rolling in the cylindrical cavity and facing the bottom base of the cone, as well as element to fracture rocks and overlapping the outer end of the column, in which the drilling rig contains the bit with the back side having a conical surface, which is the other part of the additional composite mechanical shutter, forming a gap with a tapered cylindrical cavity ring under the condition of equality of the angles formed by forming this conical cavity, forming a conical surface of the back side of the bit and angle the effective cutting soft rock, with the best example of execution according to the diameter of the cylindrical cavity of the cylindrical ring made of additional end-to-end horizontal poluchaly in the form of hemispheres.

The solution of the stated problem and the achievement of the technical results for filter pipes made possible by the fact that in the known filter tube having a circular through hole, a round through hole is made single-stage, while the diameter of the circular through hole from the outer surface of the filter tube is larger than the diameter of the round through hole from the inner surface fill element, made in the form of cylindrical pellets of filter material, with a diameter cylindrical pellets, enable a tight fit on the annular step in each round through hole from the outer surface of the filter pipe.

In a preferred example of execution of the filter tube is further provided with mounting rings on the number of round holes having an outer diameter equal to the diameter of the filter element, and as a filter material for cylindrical tablets used mesh made of corrosion-resistant material.

A variant of the inventive filter tube having a through hole, is an additional supply filtering elements by the number of through-hole configuration, the shape of the through holes, providing an intimate setting in these through holes on the additional end-to-end locking elements by the number of through holes configuration, also the shape of these holes, of a width sufficient to hold them through the filter elements, and installed at a depth of the through holes, exceeding the height of these filter elements.

Skrytaya with increasing hydrostatic pressure in the reservoir. As a result of this dependence, the sand begins to exceed that of constructed wells. The major part of the sand comes from the upper roof part, which, naturally, entails softening sand and involvement in the movement of large volumes of rock. This is the main reason of the curvature of the exterior columns in the direction of disintegration. The above follows from the linkage of the face reveal the pressure reservoir and the mouth of the well, i.e., atmospheric pressure, through the annular space and limits the ability of the method according to the prototype of the pressure, depth, and length of constructed wells. The set of essential features of the proposed installation eliminates direct connection of the pressure of formation waters with the atmosphere of air through the annular space by forming a hydraulic chamber on the bottom, which creates a water seal by filling the hydraulic chamber of the washing liquid, such as water to a pressure close to or equal Plast, i.e. by dividing the annular space in the region of the bottom filter and nefiltrovane part sealer with check valves. When the pressure in the chamber exceeding the reservoir, the absorption layer is s when close to or equal to Plast pressure, and the number of valves is determined in each specific case on the basis of the performance of the pump. The length of the hydraulic chamber and, accordingly, the distance at which establish sealer with the drill head, is determined depending on the diameter of the drill head and the angle of internal friction of sand under the water.

In this case, the created hydraulic chamber sand may accumulate in the volume equal to the volume of the internal cavity in the shape of a truncated cone with a cone angle equal to the angle of internal friction of sand under the water. The hydraulic damper chamber serves hydrostatic pressure of the reservoir, resulting in uncontrolled release of the breed as sand becomes impossible. For each aquifer, having a certain particle size distribution, angle of internal frictionreference value. Introduction to the set of essential features of the way of such a character as drilling external filter column in the presence of the trap, by making the outer columns of the filter pipe with the drill head in which the hydraulic chamber, is filled with wash liquid to the pressure close to or equal Plast, on the approach to the problem of construction horizontal or inclined drainage wells in confined sand aquifers is brand new, close to the natural processes. Implementation of drilling the outer casing that includes a filter pipe, for example with a smooth surface and protected filter elements, enhances environmentally friendly way, simplifies it by adding the function of the filter device external to the column.

Reducing pressures on the Executive bodies reach through management of sand. The amount of destroyed rock removed per unit time (VRP), must be maintained in the ratio of

VRP=SSLEVfurl/min,

where K - coefficient of loosening of sand, equal to 1.1 to 1.2;

SSLE- the cross-sectional area of the face;

SSLE= 0,785-d2, DM2;

d - diameter of the drill head;

Vfur- drilling rate, DM/min

Subject of this ratio over the arched part of the external columns is not a softening of sand and, accordingly, there is no curvature of the drainage hole.

The essential feature of this method is the achievement of the control process of the removal of rock in the form of sand in the annular space at high hydrostatic pressure provided by regulation of the size of the gap between the two parts of the additional composite mechanical shutter,one part of the additional composite mechanical shutter is a cylindrical ring with a conical cavity in the shape of a truncated cone, facing the base side of the face, as the second back side of the bit having a conical surface. The desired width of the gap is adjusted by moving horizontally not less than one part of the additional composite mechanical shutter. In practice, it ranges from 0.01 to 50 to 70 mm depending on the hydrogeological conditions (mainly the magnitude of the pressure of the reservoir water) and is determined empirically by volume submitted breed. Achieving a technical result, as the provision of regulated sand, leads to an increase in the length of the constructed horizontal or inclined drainage wells, to reduce energy consumption in the drilling process, the enhancement of technical capacities of the way, providing the opening aquifers with high hydrostatic pressure. The claimed method has important practical applications for drying flooded buildings, structures, built on the Sands, the groundwater level in which under the influence of different factors (anthropogenic, natural and other) rose above the level of the foundations of the basement floor, which has been a so-called flooding of buildings, areas with the construction of the beam is Ribnitsa currently the most effective, giving it reliability due to the controllability of the process and isolation breakable seam from the mouth, is a significant and fundamental step that can radically change the approach to existing in this area problems. The claimed method is workable and dewatering of pit walls, pits, dewatering of the underground mine workings. Introduction to the inventive method characteristic of drilling the outer casing composed of filter tubes, allows to optimize the manufacturability of the process by combining operations such as drilling, equipment constructed drainage wells filters and strengthening its walls. This reduces in comparison with the prototype, labor costs, energy consumption and increases reliability.

The prototype time clean drilling, taken on 4 wells, is 4,12 h, the installation of filters of 5.05 h, time of extraction columns protective 7,33 including the data show that the last two operations is approximately 3 times longer than the productive time associated with drilling wells. And as if all of these operations involved and actuator installation, then, of course, that energy consumption is 3 times more than in the implementation of clean drilling wells.

Rotation outwardly of the bore and prevents the spread of the outer column during the rotation of the inner column, for example, when the sludge removal.

Proposed method and device essential features together allow us to reach the optimum drilling of drainage wells on the axial force, torque and rotational speed on the outer column. They are determining the depth of constructed drainage wells and regulated the sand in the pit are defined by the following dependency:

where P is the axial force in the General case;

f - coefficient of friction of the sand on steel;

P2- pressure rocks in the amount set natural pressure, t/m;

PRK- the weight of the external columns with column, t/m;

L is the length of the drainage wells, m;

P3- the axial force on the destruction of rocks (Sands), so

Because the external column rotates, the total friction force decompose on axis (ROS) and rotational (RBP)

where- the angle formed by the resultant axial forces of friction and applied to the complex movement of the outer column progressive forward with velocity Vfurand the rotational frequency nT.

Angle

VPostup= Vfur;

Vuthe speed of rotation of the exterior columns in m/s by Setting the rotational speed of the outer columns of ntand mechanical drilling speed (Vfurdetermines the angleand through him ROSand RBPand through them and torques on the outside of column (Mt)

where D is the external diameter of the column, m

Dependency analysis is 2, 3, 6 shows that the increase in the rotation frequency of the external columns depending on the mechanical drilling speed reduces friction forces forward rotation external columns 3-6 times and increases torque 1,5-2 times. However, it should be noted that the increase in the rotation frequency of the external columns over 0,06-1(4 rpm) significant impact on the change in friction of the translational motion and torques do not render, which allows to reach the optimal axial forces during drilling, defined as the minimum with minimal arch collapse, formed on the outer column and the frequency of its rotation in the range of 0.5 to 3.0 rpm this analysis shows that the smaller the magnitude of the friction forces caused by the rock pressure, the more opportunities to increase the of Lukanov in the form of hemispheres on the diameter of the cylindrical cavity of the cylindrical ring, established with a focus in the end face of the cylindrical recess on the inner surface of the drill head, provides, in the preferred case of execution of a device, the improvement of carrying out the breed.

The claimed filter tube protects the filtering surfaces from mechanical impact and expand the functionality of the device, i.e. the ability to apply the latest as of the drill pipe.

Thus, the execution of round through-hole of the proposed forms of the claimed limitations, i.e., to the height of the step from the upper surface of the filter tubes exceeded the height of the filter element, allows to drown, i.e., to protect the filter element, place it in the cavity of the pipe wall, which, on the one hand, eliminates the mechanical stresses on the filter surface during transportation and drilling the outer column, composed of the proposed filters, on the other hand, the sand will accumulate on the filter surface to the level of the surface of the filter tubes will create over each filter element as if sand filling, improving the filtration properties that allows you to extend the filtration capability of the filter tube. Execution is the possibility of the filter depending on drilling conditions and characteristics of the aquifer, and rigid mount carried out, for example, by pressing, not greatly complicates the manufacturing technology of the filter compared with the prototype and a more simplified in comparison with the manufacture of other types of filters.

Supply filter tube mounting rings on the number of round through holes with an external diameter of the ring equal to the diameter of the filter elements, allows to reinforce the anchoring of these filter elements, to simplify the mounting technology and improve the reliability of the filter tubes, and the use as a filter material for cylindrical tablets mesh made of corrosion-resistant material such as stainless steel, improves filtration and operational characteristics of the filter. Similar technical results are achieved by providing a filter tube with the hole of the filter elements by the number of through holes configuration, the shape of the through holes, providing an intimate setting in these through holes on the additional end-to-end locking elements by the number of through holes configuration, also the shape of these through holes, the width of which is sufficient to hold them Filinov.

External column, composed of the described variants of the filter tubes, has the necessary rigidity and surface, providing a low resistance during drilling, which reduces the resistance to its rotation and move forward, can withstand high axial loads and free flowing water and dust particle formation in the pore space of the sand skeleton, the diameter of the holes of the filter element to prevent removal of sand that make up the skeleton, that is, particles of sand, the corresponding d 50 particle size distribution, which protects the layer from destruction.

Thus, the proposed set of characteristics for the inventive method, installation and filter pipes (options) are sufficient to solve the task and achieve technical results.

The invention is illustrated in the following drawings:

- Fig.1. General view of the facility for the construction of horizontal or inclined drainage wells in flooded sandy horizons.

- Fig.2. External and internal columns and element for rock breaking and overlapping the outer end of the column at the time of drilling.

- Fig.3. General view of the filter pipe with a filter element.

the world pipe with retaining ring.

Installation for the construction of horizontal or slanted wells in flooded sandy horizons (Fig.1) is a oil station 1 (usually mounted on the surface 2), and the remote control 3 and the drilling rig, which contains the rotator 4 external column 5, the rotator 6 internal column 7, coaxial external casing 5 and the inner column 7, respective surfaces which form an annular space. Transfer of axial force and torque from the rotator 4 to the outer column 5 is carried out by a special cartridge 8, the grip of the outer column 5 when the screwing-unscrewing sections - Tong 9. Rotators are placed on the movable frame 10 that moves when moving back and forth on the fixed frame 11. External column 5 includes the drill head 12, which is a continuation of the exterior columns 5 and has a cutting edge 13. Internal column 7 is equipped with an element for rock breaking and overlapping the outer end of the column 5 in the form of the bit 14 to the crown 15 and shank 16. External column 5 includes a filter tube 17 with a circular through-hole 18. The boring head 12 has a continuous cylindrical surface and its outer diameter is 1.1-1,15 external diameter space 19 sealer 20 education in downhole part of the annular space of the hydraulic chamber 21, fixed on the inner surface of the drill head 12. The length of the hydraulic chamber 21 is defined by the formula

l=dtg,

where l is the length of the hydraulic chamber;

d - diameter of the drill head;

- the angle of internal friction of sand under water,

this sealer 20 are provided with check valves 22, configured to open under fluid pressure in the hydraulic chamber 21 that is close or equal Plast. In the inner surface of the drill head 12 with a face made cylindrical recess 23. The depth and length of this cylindrical recess 23 is sufficient to establish it as one part of an additional composite mechanical shutter with an emphasis in its end face 24, and the bit 14 to the crown 15 and shank 16. Additional composite mechanical shutter consists of two parts, one of which is a cylindrical ring 25, coaxially with the outer column 5 and column 7. Cylindrical ring 25 has an internal cavity in the shape of a truncated cone 26, transitioning into a cylindrical cavity (not shown), the diameter of which is in practice equal to 1.1-1.15 diameter of the shank 16 of the bit 14. The back side of the bit 14 has a conical surface asavanich generatrix of the conical cavity 26 of the cylindrical ring 25, generatrix of the conical surface of the back side of the bit 14 and the angle of the effective cutting soft rock, a gap 27. When nominating, for example, the internal column 7, the width of the gap 27 is changing and forms a cone angle equal to the angle of the effective cutting soft rock 60-45. The diameter of the cylindrical cavity (not shown) of the cylindrical ring 25 made additional end-to-end horizontal poluchaly 28 in the shape of a hemisphere.

Face of the outer column 5 and the inner column 7 for clarity in Fig.2 conditionally divided into three functional areas:

A - zone mechanical regulation;

In the area of the hydraulic valve;

With the communication area of the atmospheric air from the annular space.

As the filter tubes in the inventive installation is most appropriate to apply the filter pipe (Fig.3), in which all the through holes are made single-stage, while the diameter of the circular through hole from the outer surface 29 of the filter pipe is larger than the diameter of the round through hole from the inner surface 30 of the filter tube, and the height h1from the outer surface of the filter pipe is larger than the height that the possibility of its tight fit on the annular step 32 in each round through hole from the outer surface 29 of the filter tube, width should be sufficient to hold the filter element 31 from falling out inside of the filter tube.

The fastening of the filter elements 31 in the round through holes of the filter tubes in a preferred example of execution can be performed by means of the mounting rings on the number of round through holes with an external diameter of the ring equal to the diameter of the filter element.

Embodiment may be a filter tube having a through hole (Fig.5), which is also provided with filter elements 31 by the number of through holes 34 with the configuration, the shape of the filter elements 31, providing an intimate setting in these through holes on the additional end-to-end locking elements (not shown) by the number of through holes configuration, also the shape of these through holes, the width of which is sufficient for the deduction of the filter elements 31, with additional end-to-end locking element 35 is installed in the through hole to a depth exceeding the height of the filter element.

As a filter material for cylindrical tablets in a preferred example, I used the mesh from corrosion-stand is to be placed horizontal or slanted wells on Board the career, connect the oil station 1 to the source of supply (not shown) and using pipelines with remote control 3, and the last with the rotator 4 external columns 5 and 6 internal rotator of the column 7, check the direction of drilling, the Tong operation 9, the cartridge 8. Collect the drill head 12, which establish sealer 20 check valves 22 column 5, forming a hydraulic chamber 21 of length l=d tg. The inner cylindrical ring 25 is inserted into the drill head 12 and fix the locking screw (not shown).

In the attached drill head 12 is inserted pipe (not shown) of the inner column 7 with slots for the shank 16 bits 14 and through the end of the drill head 12 insert the bit 14 to the crown 15, the back side having a conical surface is a part of the additional composite mechanical shutter, and is connected to a pipe (not shown), forming the inner column. Then increase the filter tubes 17 external columns and, while holding the assembled filter column 5 in the Chuck 8, the rotation is connected with the drill head 12, the pre-pressed in a hydraulic power Tong 9. When you make this layout, combined with rotator 6 internal column 7.

After Assembly in the th column 7 forward (backward) set value (estimated) of the gap 27 between the conical surfaces of the cylindrical ring 25 and the back side of the bit 14. After clamping in the Chuck 8 of the outer column 5 Tong 9 open and presentation of the moving frame 10 forward, enter assembled projectile into the ground, then include the rotation of the inner column 7, then the outer column 5 include the washing liquid feed forward.

In this case value of the drilling parameters is determined in advance. In such settings, use the rotation frequency of the filter column, the flow of washing fluid, the axial force on the shaft and the gap through which extends a discharge breed with slaughter.

The amount of axial force is chosen so that penetration rate was not higher than the rated at which the volume of destroyed rock did not exceed 1.15 volume wells.

The external rotation of the column 5 and the inner column 7 exercise or to one side, or out of phase, while the latter reduces the probability of curvature of the borehole and prevents reversal of the external columns 5 during the rotation of the inner column with the sludge removal.

It is important to control the pressure and flow of washing fluid. Its consumption should be sufficient for complete removal of the sludge, and the pressure is such to eliminate the absorption of reservoir fluids

When drilling in unstable obodozie, at the beginning of drilling with a small friction forces on the outer column 5 speed filter tubes should be minimalt=0.5 to 1.0 rpm While increasing the frictional forces to maintain the speed within these limits it is very difficult, because at large resistance to a rotation of the hydraulic motor rotator at such speed stops (all the oil goes into the drainage) and the need to increase the rpm to 3 rpm

The increase of frequency of rotation of the outer column 5 over 3 rpm leads to curvature of the wells. Therefore, the optimal external column 5 is the frequency of 0.5 to 3.0 rpm

The rotational speed of the internal column 7 has a significant role in the intensity of the destruction of the breed. For Sands its optimal range is 80-110 or 80-120 rpm, at which the method is still working. Removal of destroyed rocks provide flushing fluid through the check valves 22 sealer 20, which is set to open at a pressure close to or equal Plast, the disposal of drained water runs through the filter of the outer column 5 annular space 19. In the process of drilling additional regulate the removal of rocks, changing the value of the gap is wow mechanical shutter, established with a focus in the end 24 of the cylindrical recess 23, is made in the inner surface of the drill head 12 and the conical surface of the back side of the bit 14, which is the other part of the additional composite mechanical shutter by moving horizontally one of its parts relative to the other, under the condition of equality of the angles formed by forming these surfaces, and the angle of the effective cutting soft rock. Carry out this process by shifting either one column or both.

The improved process of sand provide a supply device in a preferred case, the execution of additional end-to-end horizontal polyaniline in the form of hemispheres, which leads to improvement of process dynamics.

The stated options filter tubes allow for drilling to provide the minimum resistance of the external columns 5 and protect the surfaces of the filter elements 31, recessed in the wall of the filter tube 17, by exceeding the height h1from the outer surface of height h2the filter element 31. During the drilling of the outer column 5 sand settles on the surface of each filter element 31, creating over him sand filling in resulta the applicability of the method, installation and options of the filter tubes is shown in the following examples.

Example 1.

The iron ore Deposit KMA.

Production lead an open way.

The field presents watered Cenomanian-libscim Sands with a capacity of up to 30 meters Sands are a mixed bag: at the top are fine, but the bottom gravelistoe with high permeability.

Currently, outside of the pit due to failing previously constructed drainage systems require additional actions.

The inventive installation invented in drained Board career horizontal drain hole by drilling through the transmission of axial forces on the face through the outer string of pipe with a cutting edge and an inner column, which sets the bit crown. The back side of the bit has a tapered surface. Equipment constructed wells of the filter tubes is carried out in the drilling process. As filter tubes used metal stainless steel pipe with a circular through-hole, made-stage, each of which has a filter element in the form of cylindrical pellets, as a filter material DL the surface of the filter pipe is larger than the height of the filter element 1.4 times. The duty cycle of the filter is 37% (depending on the Kfsand).

At the end of the outer filter column set the drill head, the diameter of the filter tube is 168 mm, outer diameter of the drill head 190 mm, which is the ratio of 1.1, which is the minimum in the claimed range. The drill head to form a hydraulic chamber length, l, equal to 600 mm, calculated by the formula l=tgand fill it with wash liquid to the pressure equal Plast. The external rotation of the column is carried out at a frequency of from 1 rpm to 3.0 Rev/min speed Increase over the proposed limit dramatically increases the axial force and bending drainage wells. Rotation of the inner column is carried out in dependence on the situation within 80-120,0 rpm going beyond these limits leads to unnecessary increase in power consumption. Rotation of the inner and outer columns is carried out in the same direction. Removal of destroyed rock is carried out using drilling fluid through check valves sealer that set pressure equal Plast, the disposal of drained water runs through the filter portion of the annular prostra composite mechanical shutter by moving the bit inside the column. The angles formed by the generatrix of the conical surface of the cylindrical ring, the conical surface of the back side of the bit and the angle of the effective cutting softwoods equal 45-60.

Indicators

Mechanical drilling speed (Vfur), m/h 35

Technical speed (including capacity, removing internal columns), m/h 20

The complexity, time 0,3

Energy intensity, time of 0.3

Length of drainage wells, m 65

Reliability,% 100

Example 2.

As in example 1. Construct an inclined drain well. In the process of drilling tested the whole claimed range of rotation of the external 0,5-3,0 rpm and internal 80-120 rpm columns. Drilling is carried out in antiphase. The angle of constructed wells 3,0. The ratio of the outer diameter of the drill head and the outer diameter of the filter tube is 1,15, check valves sealer to output the destroyed rock bottom stream of washing fluid are configured to open under fluid pressure in the hydraulic chamber, close to the Plast. As filter tubes used filter pipe with a duty cycle of 5% with the filter element in the form of cylindrical pellets from a grid, wypna depth install snap ring to the height of the filter element is 1.4. Rock (sand) output through additional end-to-end horizontal poluchaly.

Parameters:

Mechanical drilling speed 30

Vfurm/h

Technical ROP

(including capacity, removing the

internal columns), m/h 18

The complexity, time 0,3

Energy intensity, time of 0.3

The length of the filter drainage wells, m 70

Reliability,% 100

Example 3.

Conditions for implementing the method - the construction of the horizontal drainage wells from the shaft in a sandy aquifer horizons, when the groundwater level exceeds the pressure above the mouth and its magnitude remains constant along the entire length of the well. The pressure is 4-5 m water column.

Drilling carried out according to example 1, except that the pre-lining in shaft set special sealer, which, tightly compressing the filter column, prevents breakthrough of sand from behind the trunk lining. The introduction of the drill head with the sealer, with non-return valves in the reservoir is carried out at a closed additional composite mechanical shutter. After the introduction of the drill head in the reservoir include mud pump and form the drill head hydraulic chamber length 600 mm and are filled in, POPs rotkraut shutter, include the rotation of the inner, then the outer columns and serves both columns forward, adjusting the width of the gap experimentally. Drilling carried out during the rotation of the outer and inner columns in antiphase. When drilling tested the speed exterior columns and interior columns in the ranges: exterior columns 1-3 rpm, internal 80-100 rpm

Filter tube of example 1 is further provided with retaining rings according to the number of holes having an outer diameter equal to the diameter of the filter element.

Parameters:

ROP 25

Vfurm/h

Technical ROP

(including capacity,

the installation of wellheads,

removing the internal columns), m/h 15

The complexity, time 0.35

Energy intensity, time 0.35

Length of drainage wells, m 70

Reliability,% 100

Example 4.

Construct a horizontal drain hole in the conditions of example 1 installing USB-130 (the prototype).

Parameters:

ROP 35

Vfurm/h

Technical ROP

(including capacity, landing

filters, removing the

protective columns), m/h 4,5

The complexity, time 1

Energy intensity, since 1

Length of drainage wells, m Kvasiny in flooded sandy horizons, installation and filter pipe (options) working in the claimed range. When the method of construction of the horizontal drainage wells, including drilling out of phase, a significant increase drilling speed and length of the constructed drainage wells are not installed. However, a danger of the spread of the column during prolonged rotation of the inner column. The increase in the external diameter of the drill head having a continuous cylindrical surface in comparison with the diameter of the filter tube exterior columns in the declared limits, allows to obtain a softening of sand around the filter, to improve the condition of removal of fine silt fractions. This leads to the formation around the outside of the column areas of high permeability and increase well production. Compared with the prototype significantly reduced such important indicators as the complexity (3.3 times), energy intensity (3.3 times), as well as increasing the length of the constructed drainage wells (more than 2 times) and reliability (70%).

The use of external columns declared variants of the filter tubes with recessed into the wall of the pipe filter elements, for example, in the form of cylindrical pellets of filter material can reduce the SOP the weave of corrosion-resistant material (stainless steel) increases the lifetime of the filter tubes. Both filter pipes healthy and allow you to implement the claimed method. The use of the securing rings on the number of round through holes with an external diameter of the ring equal to the diameter of the filter elements, improves the reliability of the filter pipe.

Thus, the implementation of the claimed invention allows to completely solve the problem and to create the best reliable way to construct a horizontal or inclined drainage wells in flooded sandy horizons and competitive technical means for its implementation, which makes it practical applicability and safety.

Claims

1. The method of construction of the horizontal or inclined drainage wells in flooded sandy rocks, including drilling due to the transmission of axial forces on the face through the outer string of pipe with a cutting edge and an inner column, which set the element to fracture rocks and overlapping the outer end of the column for periods stop for extension tubes and operation regulation of the removal of rock in the form of sand, the flow of washing fluid, removal of destroyed rock with the washing liquid, aborig pipes, characterized in that the equipment is constructed well filter pipe is carried out in the drilling process by including in the external column filter pipe and the drill head having a continuous cylindrical surface, the outer diameter of which amounts to 1.1 to 1.15 external diameter of the filter tube, and the inner column as element for rock breaking and overlapping the outer end of the column set the bit with the back side having a conical surface, and crown, the drill head to form a hydraulic chamber by separating it from the annular filter space sealer with a non-return valve, with the length of the hydraulic chamber defined by the formula

l=d tg,

where l is the length of the hydraulic chamber;

d - diameter of the drill head;

- the angle of internal friction of sand under water,

the hydraulic chamber is filled, creating a hydraulic lock, the washing liquid to a pressure close to or equal Plast, drilling is carried out by external rotation of the column at a frequency in the range of 0.5 to 3.0 rpm, and the internal - 80,0-120,0 rpm, removal of destroyed rock perform with the washing liquid through the reverse treniruemoj water runs through the cavity of the outer column, the removal of rocks in the form of sand regulate, by changing the size of the gap between the conical surface of the internal cavity of the cylindrical ring, which is one part of the additional composite mechanical shutter, installed with an emphasis in the end face of the cylindrical recess made in the internal surface of the drill head and the conical surface of the back side of the bit, which is another part of this additional composite mechanical shutter by moving horizontally not less than one of these parts relative to the other, under the condition of equality of the angles formed by forming these surfaces and the angle of the effective cutting soft rock.

2. The method according to p. 1, characterized in that the rotation of the outer and inner columns of the pipes is carried out in antiphase.

3. Installation for the construction of horizontal or inclined drainage wells in flooded sandy horizons, including remote control and the drilling rig, which contains the external rotator columns, internal rotator of the column, a coaxial outer and inner pipe string, through the respective surfaces are formed annular space, cutting edge on the end face of the outer columns and elematary, characterized in that the outer column includes filter pipe and provided in the downhole portion of the drill head having a continuous cylindrical surface, the outer diameter of which amounts to 1.1 to 1.15 external diameter of the filter tube, and inside the drill head has a sealer, with the possibility of creating in the field of sealer - end exterior columns hydraulic chamber with pressure fluid, close Plast or equal to him, and length determined by the formula

l=d tg,

where l is the length of the hydraulic chamber;

d - diameter of the drill head;

- the angle of internal friction of sand under water,

ring sealer equipped with check valves to output the destroyed rock from the face with a stream of washing fluid configured to open under fluid pressure in the hydraulic chamber, close or equal Plast, and from a face in the inner surface of the drill head is cylindrical recess, the depth and the length of which is sufficient to establish the reference in the end of this cylindrical recess of one of the parts of the additional composite mechanical shutter in the form of a cylindrical ring with an internal cavity in the Noosa, as well as element to fracture rocks and overlapping the outer end of the column, in which the drilling Assembly includes a drill bit, with the back side having a conical surface, which is the other part of the additional composite mechanical shutter, forming a gap with a tapered cylindrical cavity ring under the condition of equality of the angles formed by forming this conical cavity, forming a conical surface of the back side of the bit and angle the effective cutting soft rock.

4. Installation according to p. 3, characterized in that the diameter of the cylindrical cavity of the cylindrical ring made of additional end-to-end horizontal poluchaly in the form of hemispheres.

5. Filter tube, which made a round through hole, wherein the round through holes made single-stage, while the diameter of the circular through hole from the outer surface of the filter tube is larger than the diameter of the round through hole from the inner surface of the filter tube, and the step height from the outer surface of the filter pipe is larger than the height of the filter element made in the form of cylindrical pellets of filter Stupeni in each round through hole from the outer surface of the filter pipe.

6. Filter pipe under item 5, characterized in that it is further provided with mounting rings on the number of round through holes with an external diameter of the ring equal to the diameter of the filter element.

7. Filter pipe under item 5, characterized in that as the filter material for cylindrical tablets used mesh of corrosion-resistant material.

8. Filter tube having a through hole, wherein it is further provided with filter elements according to the number of the through holes with the configuration, the shape of the through holes, providing an intimate setting in these through holes on the additional end-to-end locking elements by the number of through holes configuration, also the shape of these through holes, the width of which is sufficient for the deduction of the filter elements, and installed at a depth of the through holes, exceeding the height of these filter elements.

 

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