Method to construct horizontal or inclined well is fissured rock to be excavated by drilling-and-blasting operations and drilling rig for above method realization

FIELD: mining, particularly to construct horizontal or inclined wells by rotary drilling in fissured rock with the use of rotary drilling rid and adapted to be used during exploration drilling in pits and mines for iron-ore mining.

SUBSTANCE: prior-art rig is provided with artificial head comprising a number of sections secured one to another and fastened to frame pivotally connected to support frame of drilling rig. The rig also has throttle located at drainage cavity of cylinder to provide drilling rig installation outside dangerous zone so that the drilling rig may be displaced in horizontal plane from drilling axis due to artificial head usage. The artificial head is installed on ledge extending from drilling rid to face along drilling axis and is assembled out of dangerous zone. The artificial head is provided with head string. Drilling assembly passes through the head string. Predrilling is performed in drilling regime at minimal advance speed. The advance speed is controlled by throttling of discharge cavity of advancing cylinder and at high rotational frequency for depth exceeding fissured rock zone thickness.

EFFECT: increased safety and productivity of horizontal or inclined well construction, reduced labor inputs for equipment movement and enhanced technological effectiveness of drilling operation, provision of drilling direction control and drilling rig arrangement at safe distance from slope, increased well construction capacity, extended functional capabilities.

2 cl, 4 dwg, 1 ex

 

The invention relates to the mining industry, in particular to methods of construction horizontal or deviated wells with rotary drilling in fractured rocks and installation of rotary drilling, and can be used when conducting exploratory drilling in quarries and mines, for example, iron-ore deposits.

It is known that most of the iron ore deposits, especially in the area of the Kursk magnetic anomaly, presents steeply dipping ore bodies. The exploration is carried out by means of the drilling rig by the construction of vertical or slightly inclined to the vertical wells. [1. Gaslines and other Equipment and technology of high-speed drilling. M.: Nedra, 1982]. Similarly, when the development of such deposits quarries operational exploration is carried out using a drilling rig rotary drilling by buildings, mostly vertical wells [Nahigian. Drilling deviated wells reduced and small diameters. M.: Nedra, 1974]. The effectiveness of exploration is determined by the amount of geological information per meter of drilling. This is achieved by selecting the orientation of the wellbore in the direction of maximum variability of the geological properties of the rocks. For fields with steeply dipping bedding geologicas the x structures the construction of vertical exploration wells are ineffective, as the wellbore is directed along the contacts of rocks and the information obtained through the borehole does not characterize the ore column in General. Most effectively to reconnoitre slightly sloping and inclined to the horizontal or horizontal wells, the wellbore intersects the rocks in the direction transverse to the extension of geological structures that cannot be achieved in a known manner.

Improving the efficiency of exploration drilling is achieved by horizontal drilling exploration wells in the development of mineral deposits underground method [2. Kozaev JV exploration Drilling horizontal wells. M.: Nedra, 1978]

According to the method of placing the rig in mines or in the camera, where I provide a safe environment for the drilling crew, fix the drilling machine by means of screw jacks or other means (cementing pad to the fixing frame of the drilling machine by means of bolts etc).

The disadvantage of this method is a great complexity in Assembly and disassembly of the equipment in the chamber, the low efficiency of drilling in fractured rocks because of weak controllability feed speed.

In addition, according to common safety regulations, the development of mineral deposits in an open way, the UTVA is established by Gosgortekhnadzor of Russia in 2001, it is prohibited to be people within the failure wedge on the ledges and in the immediate vicinity of the slope of the ledge at the distance specified in departmental safety rules and justified in the project, which for iron ore enterprises may be equal to 15 meters or more. These requirements exclude the possibility of using an existing method and equipment for drilling horizontal wells in relation to the conditions of the open method of mining fields.

One of the ways to solve the problem of safe operations is the way, the essence of which is to pre strengthening of the slope, for example, by injection [3. EN 2002127100/03, BIPM No. 11, 20.04.04].

The disadvantage of this method is the complexity of its implementation, the high cost and duration of execution.

As a prototype for installing taken drilling rig rotary drilling UDB-8 (Report on the research, the cipher 1.5-5(78)-A-13-81-R, Belgorod, 1983, p.10-13), including a base, a drilling machine having a lower stationary frame and a rotary frame, on which the rotator, Gidravlika, hydrosoft and cylinder, drilling string comprising drill pipe and core set, the mechanism of screwing and unscrewing drill pipe, the feed mechanism of the drilling Assembly back and forth, the delivery system flushing is hidcote and implemented by the way, which provides for the establishment of a drilling rig to the point of ledge rock quarry or in the chamber of the mine, the flow of the drilling Assembly downhole and drilling.

The disadvantage of the prototype, as analogues is that they do not allow for drilling of horizontal or inclined wells at the location of the common grounds of the drilling rig further than 1.5-2.0 m from the slope of the quarry and underground conditions requires significant labor costs when moving equipment on the camera.

The disadvantages of the prototype is that it does not allow for efficient drilling in the mining conditions at rock with blasting. The drilling and blasting operations in the rocks due to the energy of the explosion leads to their complete destruction on the working unit. In areas (slopes, berms, walls), adjacent to the working unit, due to the impact energy of the explosion when the dispersion in the mountain massif is formed a zone of intensive man-made fractures. In this area formed a network of fracture greatly complicates drilling, and in some cases makes it impossible due to the intensive uncontrolled washing fluid absorption, and frequent abrupt transitions from pieces of rock from the open fractures require special regulation in the technology supply brown is on shell.

The objective of the invention is to provide a secure and high-performance method of construction of the horizontal or inclined wells, including exploration well, in fractured rock ledges quarry and mines developed using drilling and blasting operations that meet the requirements of safety regulations and ensuring the reduction of labor costs in the movement of equipment and the creation of the rig to implement this method.

Technical results that may be obtained when implementing the invention are:

for the method

- improving technology of drilling operations;

- providing the possibility of controlling the direction of drilling while placing the rig at a safe distance from the escarpment;

- improved performance during the construction of the well.

- improving the efficiency of exploration;

to install

- reliability;

- ease of use;

extension of functionality.

The solution of the stated problem and achieve the above results, it became possible:

for the method

- due to the fact that in the known method of construction of the horizontal or slanted wells in fractured rocks, developed with the use of drilling and blasting works, including the installation of the drilling rig on the ke, the flow of the drilling Assembly with the cylinder feed on the bottom, drilling and drilling, drill rig set at a safe distance outside the boundary of the danger zone with the possibility of displacement in the horizontal plane from the axis of the borehole at the site from the drilling rig to the bottom set along the axis of the borehole artificial mouth with hinge, which allows him to rotate in vertical and horizontal planes, which are collected at the border of the danger zone, introducing an artificial mouth coaxially with him estuarine column serves through it to the bottom hole drilling string, the drilling is carried out in the drilling mode with the minimum feed rate, adjustable throttling cavity drain cylinder and a high rotational speed to a depth exceeding the thickness of the zone is intensely fractured rocks;

to install

- due to the fact that the known drilling rig for the construction of horizontal or slanted wells in fractured rocks containing transport base, the base of the drilling rig, drilling rig, comprising connected front and rear struts of the lower frame and the pivot frame, on which the rotator spindle drilling machine, hydraulic breaker, Gidravlika and the cylinder, the cylinder supply, including the cavity pressure and cavity drain, the delivery system is pomyvochnoj fluid, made with the possibility of drilling in fractured rocks, horizontal or slanted wells by providing drilling rig choke on cavity drain cylinder feed, artificial mouth, consisting of connected sections, mounted on frame, pivotally connected with the supporting frame of the base of the drilling machine, which is equipped with at least two hinges, enabling rotation of the artificial mouth in vertical and horizontal planes and in the working position recorded by the system flexible stretch marks, providing a single axis with spindle drilling machine, equipped with a wellhead casing installed inside the artificial mouth coaxially with him, with the possibility of feeding the drill to the bottom, and the base the drilling machine is equipped with front and rear screw jacks, providing the deviation of the drilling machine from the horizontal axis drilling up and down.

Implementation of the proposed method with the use of artificial mouth, choking of drain line feed cylinder, regulation of drilling fundamentally changes the approach to work in the zone of fractured rock and ensures their safe and effective management of both on ledges of quarries and mines in connection with a drilling rig for the border of the danger zone, and extends the functional potential is due to conduct exploratory drilling of horizontal or inclined wells i.e. fold increase its information content in connection with a large area of the investigated layers.

The invention also makes it possible to control the direction of drilling while placing the rig at a safe distance from the slope due to its passing through the mouth of the pipe, which rests on the bottom breast.

Increased productivity is achieved through the possibility of rapid Assembly of the artificial mouth and the speed change its spatial position. The way technology because of the ease of Assembly and fastening of the artificial mouth, accessibility to technological nodes.

The claimed invention is illustrated by the following figures:

Figure 1 Drilling rig, consisting of a drilling rig, pumping station, remote control, mud pump, artificial mouth and the base.

2 is a Drilling machine in working condition, mounted in a career in the safe zone (in working condition).

Figure 3. Artificial mouth Assembly (side view), consisting of sections.

Figure 4. Artificial mouth Assembly (top view).

Declare the rig consists of blocks (figure 1) and includes the drilling machine 1, oil-pumping station 2, remote control 3, the mud pump 4, the artificial mouth 5 and the base 6.

The drive of the drilling machine 1 is supplied from the pumping station 2 via the remote control 3, through to the th are oil feed drilling machine 1 and maintaining the specified parameters. The flow of drilling fluid into the borehole carry out drilling pump 4.

The drilling machine 1 comprises a lower frame 7 (2), the swing frame 8, rotator 9, the spindle 10, the seal-swivel 11, the feed cylinder 12, guitarscapes 13, hinge 14, Gidravlika 15, getoptcvt 16, the rear strut 17, a front strut 18, the hydraulic cylinder 19, which provides the displacement of the bottom frame 7 relative to the base 6 in a horizontal plane, the transport base 20 connected to the base 6 by a hinge 21 and the screw jacks 22.

Artificial mouth 5 (figure 2) is a modular design and has a common axis with the spindle 10 of the drilling machine 1. It consists of sections 23 (3, 4)connected by a flange connection 24 into a single column. The first (initial) section 25 in the form of a pipe is installed on the base plate 26 and the hinge 27 is attached to the frame 28, rotating in a horizontal plane relative to the hinge 29. The hinge 29 is fixed to the base frame 30. The fixing frame 28 on the base frame 30 is screw swivel couplers 31.

The rigidity of the sections 23 of the artificial mouth 5 reach flexible stretch marks 32 and 33, located respectively in the horizontal and vertical planes. Tension flexible stretch marks 32 and 33 provide a tensioning screws 34. To correct the deflection of the column under its own weight flexible stretch 33 of the underlying is conducted on the roller 35, mounted on section 25. For lifting collected in a single column sections 23, the device is equipped with a hydraulic Jack 36, through which the column can be raised relative to the hinge 27 to the corner, providing free rotation of the artificial mouth 5 to align its axis with the vertical plane passing through the axis of the spindle 10.

The rig is mounted on a transport base 20 (figure 2) and is installed within the boundary of the danger zone. To change the inclination angle is within ±10° can be used screw jacks 22, installed in front of and behind the base 6.

In the artificial mouth 5-axis drilling mouth set column 37 at the end of which is placed a sealing device (not shown). Estuarine column 37 is brought to a stop in the chest bottom 38 and is fixed in an artificial mouth 5. After that, collect the drilling string with the core pipe and crown (not shown).

Declare the rig works as follows.

Overseas danger zones establish transport base 20 of the drilling rig, which secures drilling rig 1, oil-pumping station 2, remote control 3, the mud pump 4. Rear strut 17 is cut off from the swing frame 8 and hydraulic front strut 18 around the pivot 14 of the rotary frame 8, is set at a given angle and fix back the strut 17. Then the oil lines (not labeled) connecting the oil-pumping station 2, remote control 3 and the drilling machine 1 in a single system, check the efficiency of the rig.

Overseas danger zones assemble artificial mouth 5 (3, 4) of sections 23 and 25 and carry out operations, providing rigidity and the ability to change the spatial position.

After installation of the artificial mouth 5 for the boundary of the danger zone it raise the hydraulic Jack 36 with base plate 26 around the pivot 27 to a height that allows you to withdraw artificial mouth in a plane that coincides vertically with the axis of the spindle 10 of the machine 1, turn frame 28 around the hinges 29 and rigidly connected to the support frame 30 by a screw couplers 31.

Introducing artificial mouth 5 estuarine column 37 (2), is brought to rest on the ledge 38, rigidly secured, and served through her drilling string, the drilling is carried out in the drilling mode with the minimum feed rate, adjustable choke on the junction of the cylinder feed and high speed to a depth exceeding the thickness of the zone of intense fracturing of rocks of the slope, and after removing the drilling Assembly install the conductor of smaller diameter than the mouth of a column (not shown) with the possibility of sealing the annular space.

Drilling inclined with vain up or down with angles not more than 5-10° carried out by lifting the front or back of the base 6 of the screw jacks 22 on the transport base 20 (figure 2).

Example.

Test the proposed method and device manufactured in the career of Lebedinsky GOK.

Geological conditions of work:

Ore body - quartzite X-XII categories of drillability.

- Drop layers to 75° from the vertical.

Made drilling the first two wells at an angle of 25-30° directly into the berm scarp career, when this rig was positioned at a safe distance from the slope of the ledge defined by the common rules of safety (EPO).

Commercial rate is 0.57-0,62 m/h

The third well was built at an angle 1-1,5° to the horizon. For this purpose it was collected artificial mouth length equal to the distance from the ledge, turned it on and firmly established along the axis of the drilling, installed the mouth of the tube to lock it in the slope of the escarpment. Through it was supplied drilling string. Drilling was carried out by diamond drill bits with a diameter of 76 mm at minimum speed and high speed.

Established in the zone of fracture jig, have sealed the annulus, and further drilling was carried out by diamond drill bits with a diameter of 59 mm

Commercial drilling speed was 1.2-1.3 m/h

Consumption of diamond in the well is e decreased 1.7 times. The core recovery greater than 90%.

By increasing the informativeness of geological data was dramatically increased the efficiency of geological exploration by reducing the costs of their implementation more than 2 times.

Thus, the implementation of the claimed invention allows to completely solve the problem and create an optimally reliable way to construct a horizontal or slanted wells in fractured rock quarry or mine, competitive technical means for its implementation, which makes it practical applicability and safety.

1. The method of construction of the horizontal or slanted wells in fractured rocks, developed with the use of drilling and blasting works, including the installation of the drilling rig on the point, the flow of the drilling Assembly with the cylinder feed on the bottom, drilling and drilling, characterized in that the drilling rig was set for the boundary of the danger zone with the possibility of displacement in the horizontal plane from the axis of the drilling at the site from the drilling rig to the bottom set along the axis of the drilling artificial mouth with hinge, which allows him to rotate in a vertical or horizontal planes, which are collected at the border of the danger zone, introducing an artificial mouth coaxially with him estuarine the pillar pod is t through it to the bottom hole drilling string, drilling is carried out in the drilling mode with minimum feed speed is regulated by throttling cavity drain cylinder supply, and high speed, to a depth exceeding the thickness of the zone is intensely fractured rocks.

2. The rig for the construction of horizontal or slanted wells in fractured rocks containing transport base, the base of the drilling rig, drilling rig, comprising connected front and rear struts of the lower frame and the pivot frame, on which the rotator spindle drilling machine, hydraulic breaker, Gidravlika and the cylinder, the cylinder feed forward-back, including the cavity pressure and cavity drain system supply of washing fluid, characterized in that it is made with the possibility of drilling in fractured rocks of the horizontal and inclined wells by providing drilling rig choke on cavity drain cylinder feed, artificial mouth, consisting of connected sections, mounted on frame, pivotally connected with the supporting frame of the base of the drilling machine, which is equipped with at least two hinges, enabling rotation of the artificial mouth in vertical and horizontal planes and in the working position recorded by the system flexible stretch marks, providing a single axis with the spindle b is the world of the machine, equipped with a wellhead casing installed inside the artificial mouth coaxially with him, with the possibility of feeding the drill to the bottom, and the base of the rig is equipped with front and rear screw jacks, providing the deviation of the drilling machine from the horizontal axis drilling up and down.



 

Same patents:

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FIELD: mining industry.

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EFFECT: higher efficiency.

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FIELD: well drilling equipment, particularly light or superlight drilling rigs.

SUBSTANCE: drilling rig includes frame and guiding means pivotally connected to frame, rotary supplying system arranged on guiding means and anchoring members. Drilling rig is provided with support member displaceable relative guiding means and anchoring members secured to the support member through clamps. Guiding means has clamps of anchor members. Secured to lower side of support member is grouser. In the case of inclined well boring drilling rig is provided with drill steel support. Drill steel support has pins, tension bars secured to pins by clamps so that tension bars may to perform adjusting longitudinal movement and adjusting rotation about the pins. Another tension bar ends are provided with clamps. During inclined well boring frame extensions secured to the frame are used if required. Guiding means and support member have means for alternate drill steel support fixation.

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FIELD: mining, particularly to construct horizontal or inclined wells by rotary drilling in fissured rock with the use of rotary drilling rid and adapted to be used during exploration drilling in pits and mines for iron-ore mining.

SUBSTANCE: prior-art rig is provided with artificial head comprising a number of sections secured one to another and fastened to frame pivotally connected to support frame of drilling rig. The rig also has throttle located at drainage cavity of cylinder to provide drilling rig installation outside dangerous zone so that the drilling rig may be displaced in horizontal plane from drilling axis due to artificial head usage. The artificial head is installed on ledge extending from drilling rid to face along drilling axis and is assembled out of dangerous zone. The artificial head is provided with head string. Drilling assembly passes through the head string. Predrilling is performed in drilling regime at minimal advance speed. The advance speed is controlled by throttling of discharge cavity of advancing cylinder and at high rotational frequency for depth exceeding fissured rock zone thickness.

EFFECT: increased safety and productivity of horizontal or inclined well construction, reduced labor inputs for equipment movement and enhanced technological effectiveness of drilling operation, provision of drilling direction control and drilling rig arrangement at safe distance from slope, increased well construction capacity, extended functional capabilities.

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FIELD: mining.

SUBSTANCE: device using the centraliser from drilling steel, which moves along run beam of drilling machine, and containing feed cylinder for movement of drilling machine in the drilling direction and backwards, at least one steering wheel rigidly installed relative to feed cylinder and elastic feed member moving around the wheel and connected to drilling machine and to run beam, centraliser from drilling steel installed with possibility of being moved on run beam and rigidly relative to feed cylinder in longitudinal direction of run beam and containing central hole for the drilling rod, feedthrough hole on the side of central hole for movement of drilling rod to central hole and from the latter, and device for closing the feedthrough hole during drilling process, and channels for fluid medium under pressure for supply of fluid medium under pressure to and from fluid medium chambers under pressure of feed cylinder. Centraliser contains actuator actuated with fluid medium under pressure for closing of feedthrough hole, channel for fluid medium under pressure is connected between feed cylinder chamber, to which fluid medium under pressure is supplied during drilling to move the drilling machine in the drilling direction, and actuator of centraliser so that pressure of fluid medium under pressure makes the actuator close the feedthrough hole.

EFFECT: automatic closing of centraliser hole.

14 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: downhole centraliser for a tubing string is mainly rigid and has a tubular plastic body with opposite ends and at least one lock ring mounted at the tubular body end. The lock ring or every lock ring is also made of plastic and has elastic modulus that does not exceed elastic modulus of the tubular body. The lock ring or every lock ring is engaged with the tubular body by shrink fit. Close to the tubular body end there is at least one opening, and close to the lock ring there is at least one respective ledge or vice a versa. In operation process the ledge and opening are engaged with each other, and in result the lock ring is engaged directly with the tubular body.

EFFECT: galvanic corrosion is excluded.

12 cl, 8 dwg

FIELD: pipes.

SUBSTANCE: group of inventions relates to systems for alignment and connection of components for assembly of pipelines and pipe strings lowered into well. System for alignment and connection of components comprises: support structure; a measuring apparatus coupled to support structure and operatively arranged to spatially analyse a first tubular component with respect to a second tubular component for determining an adjustment vector therebetween; an alignment apparatus coupled to support structure and in data communication with measuring apparatus, and including a plurality of actuators operatively arranged in parallel for moving at least one of first or second tubular components relative to other for coaxially arranging first and second tubular components in accordance with adjustment vector; connection apparatus coupled to support structure and operatively arranged for connecting first and second tubular components together.

EFFECT: technical result is improvement of quality and reduction of time for assembly of tubular components.

28 cl, 11 dwg

FIELD: oil and gas industry.

SUBSTANCE: device includes a rotary body provided with a guiding element for the passage of the flexible pipe in the side wellbore, a driving mechanism for the body turn at a discrete angle, a driving mechanism for fixing the rotary body in the desired position and comprises control devices for its movement in the wellbore and setting in the correct position, an electronic functional block diagram with a uninterrupted power supply and components for wireless two-way electromagnetic communication on the subsurface rock with a ground control unit. The device is suspended on a flexible pipe via a stop collar fixed on the rotary body and ensuring the passage of the flexible tube in the side wellbore, moreover the flexible pipe is equipped with a limited coupling adapted to abut the stop collar. The driving mechanism for fixing the rotary body in the desired position is designed in depth as an electromechanical anchor with advancing locking rams. The control devices for the device movement in the well and setting in the necessary position include a flaw detector electromagnetic sensor mounted on the rotary body, and a gyroscopic inclinometer. The wireless two-way electromagnetic communication with the ground control unit includes a transceiver and a dipole transmitter of electromagnetic waves controlled by an electronic functional block diagram.

EFFECT: simplified process of guidance and delivery of flexible pipe in the side wellbore and reduced labour costs.

3 dwg

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