The method of pre-drainage field
(57) Abstract:The inventive exercise geodynamic zoning array field with his assessment of the stress state and have vodopadnyaya well in unloaded areas of the array. 1 Il. The invention relates to a method of drainage of irrigated fields and can be used when selecting drilling locations of wells intended for water supply.There is a method of pre-drainage of fields, in which vodopadnyaya well designed for pumping water from the water reservoir, have the correct nodes of the grid.The disadvantages of this method is unreasonable costs for the construction of wells, the flow rate of which is insignificant, and the increase in terms of pumping, which is due to take into account the real structure of the flooded reservoir and its stress state.There is also known a method (prototype) preliminary drainage fields, in which vodopadnyaya well feature groups (shrubs) in Moldovia parts of the folds or in the flooded areas of tectonic disturbances.However, the zone of maximum water loss of species due to neravnomernosti zones of the rock mass permeability is significantly reduced and the fluid pressed in the area of discharge. As a result, the efficiency of the wells located in stressed areas is reduced. So when Bush location of wells due to the inclusion of a block structure of the array and its stress state increases the drying time and the costs of operating the wells.The purpose of the invention is improving the efficiency of pre-drainage.This goal is achieved by the fact that produce geodynamic zoning field emitting active blocks of the array and assessment of the stress state and have vodopadnyaya well in unloaded areas of the rocks.The drawing shows the implementation of the proposed method.The method is as follows. Using the method of geodynamic zoning based on the use of topographic maps, aerial and satellite images of different scales, geological, geophysical, geomorphological and other materials in the field area 1 allocate tectonically active blocks 2, which define the stress state of rock massif (see Geodynamic zoning of mineral resources. Methodical instructions. L., 1990).To characterize the stress state of rocks in blockhouses section 1 outline contour 3 set the contours plots of discharge 4 and have vodopadnyaya wells 5 mainly in these areas.Implementation of the proposed method is possible on the basis of the fact that most arrays of ore and coal deposits are in conditions of sharply inhomogeneous stress state. Available in an array of heterogeneity result in tectonically stressed and unloaded zones. In tectonically stressed zones under high stress is elastic compression of rocks with decreasing porosity and wringing of fluids in the area of discharge. When pumping water from the unloading area develops supporting rock pressure, which further prigruzhat surrounding rocks, stimulating the washing fluid into the discharge region. Thus, the draining of the aquifer rocks will be more effective in a shorter time and with a minimum number of active wells.It is known that the stress state of the rock mass can be described on the basis of geodynamic zoning, identifying block structure of the array and evaluating the interaction of blocks (see (I. M., Petukhov, I. M. Geodynamic zoning fields when designing and operating a mine. M.: Nedra, 1988).The magnitude of the effective stress can be calculated in fractions of geostat the wife in the contour.By drawing contour lines are the outlines of tectonically stressed and unloaded zones. At the location of the dewatering wells in tectonically unloaded areas of the massif will create favorable conditions for increasing their flow rate and effective drainage of adjacent areas of the array. On the contrary, at the inception of the wells in tectonically stressed zones of the drying effect will be greatly reduced due to the negative impact of rock pressure filtration of fluid from the discharge zone to the zone prigruzki (to the well).For example, these patterns are clearly expressed when pumping fluid from the reservoir to Cucirca-Kingofsat field response. In particular, it was found that the maximum average daily flow rate calculated over a period of 30 years, have wells located in the zones of discharge. In this case the points of maximum flow rates offset Moldovia parts of the field.Tectonically tense and unloaded zones and coal deposits of Kuzbass. For example, for mine d'angers-southern Kuzbass determined the ratio of principal stresses as 0,7:1:1,3. The maximum and minimum compressive stresses Aquifer sandstones form a wide basin. As a result of calculations defined zone configurations unloading and prigruzki. Under the action of pressure difference, the fluid will always be squeezed from the surrounding rocks in the unloading area. Because tectonic stresses are stable for many years, at the location of the dewatering wells in zones of discharge dewatering of the aquifer rocks will be achieved using fewer wells and for a shorter time. The METHOD of PRE-DRAINAGE of FIELDS, including the zoning of the mountain massif of the field and drilling dewatering wells, characterized in that conduct geodynamic zoning mountain array of field emitting active blocks of the array and the evaluation of its stress state, and vodopadnyaya wells are drilled in unloaded areas of the rocks.
FIELD: oil and gas extractive industry.
SUBSTANCE: method includes use of device providing for manufacturability of assemblage of casing and drilling columns and concurrent drilling by two columns, provided with independent drives, and drilling, by casing column, of non-stable rock solids performed with frequency no greater than one calculated from formula
where Vmec - mechanical drilling speed, m/min, Fr - friction forces against rotation, Ften - friction forces against linear displacement, R - casing column radius, m, α - angle between vectors of directions of linear and rotating movements.
EFFECT: higher effectiveness, higher productiveness, higher reliability.
2 cl, 5 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: method includes erection of wall, prior reinforcement of rock massif along extraction track by drilling longitudinal and slanting wells and forcing reinforcing cementing solutions into these wells, destruction and cleaning of rocks under protection of cementing cover, erection of permanent support, following reinforcement of contour-adjacent massif by cementation solutions through wells, drilled perpendicularly to mine axis. Draining wells are additionally drilled with delay through cementing layer having length greater than thickness of reinforced rocks zone, to form a draining layer around reinforced cover.
EFFECT: higher effectiveness.
2 cl, 4 dwg
FIELD: mining, particularly for drawing-off gases from coal bed simultaneously with water removing from coal bed.
SUBSTANCE: method involves drilling vertical well having cavity from ground surface; communicating vertical well cavity with horizontal drain holes used for gas recovery from coal bed.
EFFECT: provision of access to large underground area from ground surface and uniform coverage thereof, increased efficiency of gas production due to increased drainage system area along the strike of coal bed and due to improved well drilling technique.
27 cl, 11 dwg
FIELD: mining industry, particularly to remove water from deep pits, especially in going to underground excavation in upper part of ore body.
SUBSTANCE: system comprises main pipeline, pumping unit with pumping pipe and power supply members. The system is additionally provided with lowering-and-lifting device arranged on pit side and tightening device provided with rope. The first rope end is connected with tubular case in which submersed pumping unit is installed. Submersed end of the case has throughput orifices for liquid passage. Through orifice formed at outlet case end communicates with pumping pipe orifice, which in turn is connected with inlet end of the main pipeline through connection pipe and connection flange. Outlet end of the main pipeline is secured in the lifting-and-lowering device.
EFFECT: reduced material consumption and increased efficiency of water drainage from water-filled deep pits.
FIELD: mining, particularly to prevent underflooding of ground areas to be shifted during underground mining performing.
SUBSTANCE: method involves forming contour trench-like cutoff curtain in ground; creating drainage devices inside the contour and removing water from ground movement trough. The contour trench-like cutoff curtain is arranged along predicted horizontal line of ground surface relief formed after ground subsidence and height mark thereof is higher than that of maximal ground water level in spring. Necessary throughput Q of drainage devices is set on the base of mathematical expressions.
EFFECT: increased safety of underground mineral mining.
2 dwg, 1 ex
FIELD: drilling and survey, particularly special methods or apparatus for drilling.
SUBSTANCE: underground system includes drain holes, the first well extending from well drilled from ground surface, mainly from underground excavation interval start to remote end thereof. The system also has a number of side holes extending from the first well. Distance between side hole bottom to well drilled from ground surface may be selected so that it is substantially the same for all side holes to facilitate side hole drilling. Method may also involve uniting two or more drain hole systems within the boundaries of underground zone to provide uniform coverage of full underground zone area. System may additionally have a number of communicating drain hole sub-systems associated with main well drilled from ground surface to reduce ground surface area, which provides access to underground zone.
EFFECT: increased efficiency, provision of uniform coverage of full underground zone area and reduced access area.
54 cl, 10 dwg
FIELD: mining, particularly to reduce ejection of underground water flowing into mine during mining operations to ground surface.
SUBSTANCE: method involves receiving and collecting of mine inflow, which enters mining zone from cone of depression along mine tunnels; cleaning mine inflow; accumulating thereof in underground water accumulation means and delivering mine inflow into water-bearing seam. Mine inflow is supplied out of cone of depression located outside of mining zone in direction of water-bearing seam depression line to provide water return in operating mine tunnels, wherein distance between lower edge of cone of depression and point of mine inflow supply must be not less than width of mine inflow spreading in water-bearing seam. Mine inflow to be discharged from water accumulation means is supplied to intermediate sump and then is filtered in water-bearing seam due to intermediate sump location in water-bearing seam. Mine inflow is supplied to underground or land-based intermediate sump.
EFFECT: increased efficiency of hydrological regime recovery and improved ecological safety due to landscape conservation and enhanced industrial safety due to elimination of underground gas accumulation in dewatered water-bearing seams.
4 cl, 3 dwg
FIELD: mining; construction.
SUBSTANCE: method of horizontal radial drain hole constructing in hard rocks includes vertical shaft sinking and drilling from it horizontal radial drain hole and constructing from its bottom additional vertical shaft. Using both shafts along the full length of horizontal radial drain hole it is located string camouflet charge. After charge explosion there are formed horizontal radial drain hole with area of bund fracturing and then on one side of newly formed horizontal radial drain hole there is mounted surface casing with closer and draining, and on the other - choke. On drained territory there is installed at least one hydro-supervisory well.
EFFECT: reduction of drill footage; reducing of horizontal radial drain hole breakingin terms; rising of its interception ability and ability to make an attendance for dewatering drained territory.
3 cl, 2 dwg, 1 ex
SUBSTANCE: method and device for erection of horizontal and drain hole in watered sands is related to mining industry and construction, in particular - to methods and devices for erection of horizontal wells with the help of rotary drilling in watered unstable sands and may be used to dry mineral deposits, industrial sites, to clear heads of underground waters in process of tunneling, construction of buildings with preliminary water drawdown, in erection of horizontal wells of various technical purpose in loose watered soils, also under conditions of high urban saturation. Achievement of result became possible due to maintenance of technological process at permanently maintained pressure of structural flushing liquid higher than pressure of stratal ground waters by 0.3-0.5 atmospheres under protection of stable layer, which is formed by structured flushing liquid on well walls, as a result of which impact of mountain pressure at drilling string is eliminated. Realisation of method is carried out by complex device characterised with availability of mechanical part, including drilling plant, conductor, sealant or drill string, or filtering string and support of vertical excavation, and also hydraulic system of structured flushing liquid pressure provision and maintenance in erected well as higher than pressure of stratal ground waters in periods of horizontal drain hole erection and installation of filters in it, which is made of three functional hydraulic lines.
EFFECT: provision of horizontal drain hole walls stability in process of drilling and installation of filters, increased depth of drilling and diametre of erected well, provision of controlled carryover of sand from layer, preservation of natural soil properties in near-filer zone; increased safety of technological process, increased efficiency of drilling, reduced load at performing elements of drilling plant.
10 cl, 2 dwg, 1 ex
FIELD: oil-and-gas production.
SUBSTANCE: providing of stability of well walls, process controllability of opening of waterbearing formation of operation of two waterbearing formations of one upward drain borehole has become possible ensured by creation of backpressure in annular space of well during all time of its drilling in incompetent rocks and also usage in particular case in the capacity of intermediate string of filtering pipe string. Device for opening of waterbearing stratums in incompetent rocks by upward drain borehole includes drilling rig, rotator, main mud pump, drilling assembly, intermediate string, filtering pipe string and equipment of wellhead, containing conductor, wellhead mandrel, pipes grab, gland, closing sleeve, outlet and shutter. Intermediate string is outfitted by ring, rigidly installed to it at bottom end with ability of installation of sealing ring for overlapping of annular gap between conductor and intermediate string. Device is outfitted by additional boring pump, connected to outlet of wellhead mandrel, and also by nozzle installed at outlet of this branch diametre of which depends on static level of waterbearing formations at wellhead and rotary crane for passing of water into outlet from additional drilling pump.
EFFECT: providing of ability of additional water removing.
3 cl, 4 dwg, 2 ex