Valve of drill motor and its application method

FIELD: oil and gas industry.

SUBSTANCE: downhole tool includes a drill bit on its lower end and a drill motor containing a casing with a rotor rotating in the rotor channel in the casing when the drill tool passes through it. The rotor has a bypass channel for bypassing some portion of the drill mud via it. The valve includes a plate of the valve, which is installed upstream of the motor and has at least one flow pass and at least one bypass passing through the same plate. At least one flow pass is hydraulically interconnected with the rotor channel for passage of the drill mud passing through it. The rotor is made so that it can be rotated in the casing. At least one bypass is selectively hydraulically interconnected with the bypass valve when the rotor is being rotated in the casing, and the bypass channel is selectively moved in a position of alignment with at least some part of at least one bypass for bypass of some part of the drill mud via it, thus generating an impact action on the hammer.

EFFECT: preventing seizures of a drill tool, reducing vibration, increasing drilling efficiency with a downhole tool so that the bit damage is prevented.

25 cl, 14 dwg

 

This invention relates, generally, to techniques for performing operations on the rig floor. More specifically, the invention relates to technical means, such as drilling motors (and associated valves) used in drilling in boreholes.

In the exploration and production of oil and gas from underground reservoirs make available through drilling in boreholes from the surface. In General, the drill bit is mounted on the lower end of the column pipe (called "drill pipe") and pushed deep into the earth from the surface to perform the wellbore. Drilling motor mounted in the drill string to perform various functions, such as power flow to the drill bit for drilling the wellbore. Drilling fluid or "wash solution" can be pumped through the drill column from the surface and released through nozzles in the drill bit. Drilling mud can make drill cuttings from the wellbore, submitting it to the surface through the annular space between the drill pipe and the wall of the wellbore. With the passage of the fluid through the downhole motor may operate the rotor installed in the stator of the drilling motor.

Conventional hydraulic downhole motor may, for example, be helical or volumetric downhole motors�eat having a fixed stator with helical teeth, with a rotating rotor installed in it. In General, the rotor has a number of screw teeth come in contact with the helical teeth in the stator, the number of which is larger. Drilling mud (or other suitable fluid) can be supplied from the pump into the space between the rotor and the stator. Drilling mud may be pumped through the engine and to distort along the screw in it, securing the eccentric rotation of the rotor. Also developed other drilling engines, such as turbine engines rotors in a turbine.

In some embodiments, may be required to control the flow of fluid passing through the drill column, as described, for example, in U.S. patents №№ 7086486, 4979577 and 4275795. The fluid flow can be used to create impact or hammer action, as described in U.S. patent No. 6508317, which is incorporated herein by reference.

Despite the development of techniques to control the flow of fluid passing through the drill column, there remains a need for creation of improved methods for flow control. It is necessary to create methods that you can use to help prevent sticking of drilling tool in the wellbore. Additionally it is necessary to create methods �of menichini vibration and/or increase the efficiency of the downhole drilling tool of prevention while damage to the bit. The present invention aims to meet these requirements in technology.

The invention relates to a valve for drilling engine. The valve has a passage for passing a fluid in a channel of the rotor in the motor for rotation of the rotor therein and a by-pass for the passage of fluid through the bypass channel in the rotor. The bypass is selectively mating with a bypass channel to selectively provide bypass fluid on it. The invention relates to a valve of the drilling motor is used to control the flow of fluid passing through the rotor of the drilling motor. The valve can be used, for example, for the selective creation of pressure pulsations in the flow of the fluid passing through the drilling motor, for example, for a given level of pressure and/or torque. The valve can also be used to create high-frequency oscillations in the speed of rotation of the bit and/or torque control of the drilling motor for selective deceleration of rotation of the bit, thus creating pressure spikes to generate impact in torque at the drill bit. The flow of the fluid can be varied to reduce the rotational (or transverse) vibration in the engine to help prevent the adhesion-slip and/or assistance before�tradenew of stuck drill tool in the wellbore. The flow of the fluid can also be modified to increase the efficiency of drilling (for example, increasing the rate of penetration at a constant axial load on the bit and reduced reactive torque).

At least in the aspect of the invention relates to a valve for controlling the flow of drilling fluid through the downhole tool installed in the wellbore, passing an underground reservoir. The downhole tool includes a drill bit at its end and drill motor. A drilling motor has a housing with a rotor rotating in the rotor channel in the casing, when the drilling fluid passes through it. The rotor is provided with a bypass channel for bypassing a part of the drilling mud on it.

The valve includes a valve plate (or plate valve) installed upstream from the engine. The valve plate has at least one flow passage and at least one through-pass passage. The flow passage is hydraulically connected with the channel of the rotor for the passage of drilling mud passing through it, wherein the rotor rotates in the casing. The bypass passage selectively hydraulically communicates with a bypass channel when the rotor rotates in the casing, and a bypass channel is selectively moved to a position overlapping at least part of at least one�th a bypass passage for bypassing a part of the drilling mud on it this shock effect is generated at the bit.

The rotor may be a screw rotor, making the epicyclic motion in the screw stator in the casing, or the turbine rotating in the casing. The bypass passage may be off-center relative to the axis of rotation of the rotor. The channel of the rotor may be off-center relative to the axis of rotation of the rotor. The valve plate may include a middle portion and an outer ring, at least one needle, forming at least one channel of the rotor between them.

The valve may include a nozzle, the suspension of the rotor, a ring suspension and/or the tip. The tip can be directly or not directly connected to the rotor. The bypass passage may include a plurality of metering passages. The bypass channel may be adjusted to a position of full alignment, partial alignment or lack of alignment with the bypass passage.

In another aspect, the invention relates to a downhole tool installed in the wellbore, passing an underground reservoir. Downhole drill string has a drill string with drill bit on the end and drilling mud passing through it. The downhole tool includes a drilling motor mounted in the drill string. Drilling motor includes skin� and the rotor, rotating the rotor in the casing, when the drilling fluid passes through the channel of the rotor between the housing and the rotor. The rotor is provided with a bypass channel to bypass it part of the drilling fluid. The downhole tool also includes a valve installed upstream from the engine, to control the flow of drilling fluid passing through it.

The valve includes a valve plate mounted upstream from the engine. The valve plate has at least one flow passage and at least one through-pass passage. The flow passage is hydraulically connected with the channel of the rotor for the passage of drilling mud passing through it. The bypass passage has a selective hydraulic communication with the bypass channel when the rotor rotates around the casing and moves the bypass channel into a position of alignment, at least with a plot, at least one bypass passage for bypassing a part of the drilling mud on it, with a shock effect is generated at the bit.

The engine can also include a helical stator, and the rotor may be a screw rotor, making the epicyclic motion in it. The rotor may be a turbine, rotating around the axis of the downhole tool. The downhole tool may also include a controller for �electives throttling of flow, passing in the bypass channel. The controller is functionally connected with the upstream end of the rotor.

The controller may include a housing with a clutch for selective rotation regulating rotor at a predetermined pressure, thus regulating the rotor selectively provides the passage of the drilling fluid, at least one bypass passage. The controller may include a retractable piston to selectively allow passage of drilling mud therein and rotation of the regulating rotor, or brake, is selectively released to ensure rotation of the regulating rotor.

Finally, in another aspect, the invention relates to a method of controlling the flow of drilling fluid through the downhole tool installed in the wellbore, passing an underground reservoir. The downhole tool includes a drill bit at its end and a drilling motor and drilling motor includes a housing with a rotor rotating in the rotor channel in the casing, when the drilling fluid passes through it. The rotor is provided with a bypass channel for bypassing a part of the drilling mud on it.

Method includes installation of valve plate upstream from the engine. The valve plate has at least one flow passage and at least one squannyplappy pass. The flow passage is hydraulically connected with the channel of the rotor. The bypass passage has a selective hydraulic communication with the bypass channel when the rotor rotates around the casing and moves the bypass channel to a position in alignment with the bypass passage. The method further includes the rotation of the rotor using the pass the drilling fluid through the flow passage in the rotor channel, and creating impact through selective bypassing a part of the drilling fluid through the bypass plate and the bypass channel when the bypass channel is moved to the position of alignment, at least part of the bypass passage. The method may also include regulating the supply of fluid to the valve plate and selective skipping of the fluid in the bypass channel.

To ensure a detailed understanding briefly described above features and advantages of the invention below is a detailed description of its embodiments shown in the accompanying drawings. It should be noted, however, that in the accompanying drawings show only typical embodiments of this invention, not limit its scope as the invention may admit other valid implementation options. The figures do not necessarily respect the scale, and some signs and shapes mo�ut to be shown garbled or schematically for clarity and brevity.

Fig. 1 schematically shows partially in section of a drilling rig for borehole tool including a drill column, the drill motor with the valve and the drill bit going forward in the earth to fulfill the wellbore.

Fig. 2A and 2B shows a longitudinal cross-section exploded view, respectively, of the plot layout of the bottom-hole Assembly (BHA) downhole tool having a drilling motor valve according to the invention.

Fig. 3A-3F in the cross-section of the valve of Fig. 2A along line 3-3 shown the valve plate in various positions.

Fig. 4A and 4B schematically shows a longitudinal cross-section plot of the downhole tool with different configurations of the engine with the valve plate and the regulator according to the invention.

Fig. 5A and 5B schematically shows the transverse and longitudinal section respectively of the plot of the downhole tool having a drilling motor with an alternative valve.

Fig. 6 shows a block diagram of the sequence of operations of a method of controlling the flow through the downhole tool.

Below the described apparatus, methods, techniques and sequences of commands to implement the methods of an object of the present invention. However, it is clear that the described embodiments of can be applied without these specific details.

Fig. 1 employed�but shows the downhole tool 10, containing the drill column 2 and the drill bit 1 at the lower end. Drill string suspended by a derrick 4 for the drilling of the barrel 6 of 6 wells deep into the earth. The bottomhole Assembly (BHA) 8 is located at the lower end of a drill string 2 above the drill bit 1. BHA 8 may have a drilling motor 9 with the valve 11 according to the invention.

Drilling fluid (or fluid) is pumped from the reservoir drilling fluid 12 through the drill column 2 as indicated by the arrows. When the drilling mud passes through the drill column 2, it activates and supplies power to the drilling motor 9. Drilling motor 9 is provided with a valve 11 for selectively bypassing a portion of the fluid supplied to the drilling motor 9, as described later in this document. The drilling motor 9 is used to rotate and advance the drill bit 1 deep into the earth. Drilling fluid passing through the drilling motor 9, exits the drill bit 1, is returned to the surface and re-pumped through the drill column 2 as indicated by the arrows.

Although in Fig. 1 shows a specific configuration of the downhole tool 10 on the rig floor, the downhole tool may be any of a variety of tools known to those skilled in drilling. There are numerous devices and configurations suitable for drilling �of tolow wells deep into the earth, and limitations no specific configuration.

Fig. 2A and 2B shows a cross-sectional exploded view, respectively, of the drilling motor 9 and the valve 11, the BHA 8 downhole tool 10 of Fig. 1. As shown in Fig. 2A, the valve 11 includes a valve plate 200 upstream from the drilling motor 9. The valve plate 200 can be installed in the sub 203 (or drill pipe), functionally connected with the near to the mouth of the well the end of the drilling motor 9.

The drilling motor 9 has a stator 202 and a channel 204 of the rotor, passing through it, and the rotor 206 with a bypass channel 208 that passes through it. The drilling motor 9 can, if necessary, be equipped with other elements, such as the nozzle 210, the suspension rotor 212, the ring 214 of the suspension and the tip 216. Depending on configuration, some or all of these elements can be fixed relative to the rotor 206 or connected for rotation together with it. These elements have a channel 218 that passes through them, hydraulically communicating with the bypass channel 208 for passing through a fluid medium.

The valve plate 200 has a passage 226 flow, hydraulically communicating with the channel 204 of the rotor for the passage of fluid through it and the rotor 206. The valve plate 200 has a bypass 220 (or the bypass passage) passing through it, mounted for selective Hydra�chip metallic message with a bypass channel 208 for selectively bypassing a part of the drilling mud, passing through it. The valve plate 200 can be equipped with a locking mechanism (not shown), such as a ring, key, slot, or other connective device for stationary fixing plate valve 200 in place relative to the stator 202. The configuration of the plate 200 of the valve adjacent to the rotor 206 of the engine, can be used to create integrated configuration engine with valve to reduce the space occupied in the drill string.

Fig. 3A-3F in the sections part of the BHA 8 Fig. 2A along line 3-3 illustrates the operation of the plate valve 200. In these figures also shows an example of the sequence of movement of the rotor 206 of the engine when the passage of the fluid through the drilling motor 9 (see, e.g., Fig. 2A). The rotor 206 of the motor rotates in the channel 204 of the stator 202 engine. The rotor 206 of the engine can be moved from the first position of Fig. 3A successively through the position of Fig. 3B-3D and in the end position of Fig. 3E, as indicated by the arrows.

As shown in Fig. 3A-3E, the bypass plate 220 200 valve is fixed in the center of the wafer 200 of the valve. The bypass plate 220 is shown disposed in the center in the middle part of the plate 320, but may be located in any suitable location of the plate 200 of the valve providing selective hydraulic communication with the bypass channel 208. As shown in f�G. 3F, you can create additional bypass 220' of the plate. Can be created by one or more of the chambers 220, 220'.

The valve plate 200 includes a middle portion 320 and the outer ring with spokes 322 324 passing between them. Passages 226 flow is formed between the middle portion 320, outer ring 322 and the pins 324. Passages 226 flow can be used for feeding the fluid medium through the valve plate 200 in the channel 204 of the rotor for supplying power to the motor 9 and to bring the rotor into rotation. Although shows the configuration with the middle section and spokes, the valve plate may have various forms for filing of the fluid flow to the engine.

Part of the fluid can selectively be led through the bypass channel 208 through 220 bypass plate as the rotor 206 of the engine passes over the valve plate 200. The bypass plate 220 is shown passing through the center of the middle part 320. Depending on the position of the rotor 206 of the engine, during its rotation in the channel 204 of the rotor, the bypass plate 220 is selectively hydraulically communicates with a bypass channel 208. This selective hydraulic communication interrupts the flow of the fluid passing through the engine 9. The valve plate 200 can be given such dimensions and shape that the bypass plate 220 is opened in the bypass channel 208 committing the epicyclic motion of the rotor 206 of the motor When the rotor 206 of the engine makes the epicyclic motion in the stator 202 engine the bypass channel 208 performs the epicyclic motion around 220 bypass plate, entering the position of alignment and out of position in alignment with the bypass plate 220, thereby increase and decrease the space given to the flow of fluid when the rotor 206 of the engine.

As shown in Fig. 3A, 3C and 3D, the bypass plate 220 may at least partially be covered (partially open), the bypass channel 208. The bypass plate 220 may be completely covered (to open), the bypass channel 208, as shown in Fig. 3B. As shown in Fig. 3D, the bypass plate 220 can be completely blocked (closed) for the flow of fluid through the bypass channel 208. If the passage of the fluid flow in the bypass channel 208 is blocked, the fluid goes through the passage 226 of the flow in the valve plate 200 and into the channel 204 of the rotor.

Selective hydraulic communication through the bypass plate 220 and the bypass channel 208 perepuskat part of the fluid passing through the channel 204 of the rotor. These interrupts are creating pulsations of the fluid passing through the engine 9. These pulsations of the fluid can be used to control the torque of the motor 9. These pulsations of the fluid can also be used to create a variable feed of the drill bit shifting solid�particle near the bit, that can cause sticking of the tool in the wellbore.

Selective hydraulic communication of the plate 200 of the valve with a bypass channel 208 creates a variable area for passage of fluid. Since the working area of the flow through the bypass 220 (or 220') of the plate and in the bypass channel 208 may change when the rotor 206 of the engine, can be set changing the flow through the engine. Because fluid can get acceleration and negative acceleration due to relative rotation of the bypass plate 220 and passageway 208, the power of "water hammer" may be generated along the longitudinal axis of the drilling motor 9.

The bypass plate 220 can be used to form the fluid path through the valve plate 200 and through the bypass channel 208. The flow of fluid through the bypass channel 208 reduces the amount of fluid passing between the rotor 206 of the motor and the stator 202 motor with reduced torque and/or speed (rpm) drill motor 9. This decrease in torque may briefly slow down the rotation of the bit and may also create a "shock effect" in torque at the drill bit. This "shock effect" can generate power, creating fluctuations in torque due to changes in pulse pressure during CE�objective the alignment plate 200 of the valve (open, partially open and/or closed). Changing the flow can also be used to actuate additional tools in the bottomhole Assembly (BHA). For example, the fluid of high pressure can be directed to other downhole tools such as drill rotational device pulses, of a drilling device, an axial shock pulse, the device for creating pulsations/modulation of the flow, drill bits, drill reamers, centralizers with rigid blades, and other downhole tools known types under drill motor using the fluid with full pressure applied to the motor.

Fig. 4A-4B schematically shows a motor BHA 9 8 Fig. 1, equipped with a valve plate 200 and controllers 400a and 400b, respectively. Controllers 400a, b can be performed with the possibility of selective throttling of the fluid flow in the valve plate 200 and the motor 9 to bring about changes in torque on the motor 9. This changing torque caused by interrupted flow, can be used to generate rotational momentum or "percussion".

Fig. 4A shows the controller 400a "sliding clamp" that is installed upstream from the engine 9, and the valve plate 200. The controller 400a includes a casing 430a re�a battery with a passage 432 through it the coupling 434a clutch, the rotor 436 regulator, stator 437 regulator and nozzle 438.

The lower end of the casing 440 430a can be inserted in the middle to the mouth of the well the end of the 442 (or vinciata threaded rear portion) of the rotor 206 of the engine and passes some distance to the mouth of the well from him. The valve plate 200 is mounted contiguous with the near to the mouth of the well the end 442 of the rotor 206 of the engine. Housing 430a has a tubular body, terminating in a tip 444. Housing 430a has a through hole 446 to ensure that the fluid passes into the passage through nozzles 432 438 and in the bypass channel 208, as indicated by the arrows.

During passage of the fluid through the passage 432 fluid rotates the rotor controller 436 in the stator 437 controller method similar to that described for the rotor 206 of the engine and the stator 202 engine. Clutch 434a clutch operates with the possibility of throttling the fluid passing through the passage 432 at a given pressure, thus limiting the rotation of the rotor 436 regulator and the passage of the fluid in the bypass channel 208.

Clutch 434a clutch and rotor controller 436 is mounted for rotation in the passage 432 of the casing 430a. Clutch 434a clutch includes a drive shaft 448 and 450 brake adjacent to the tip 444. The rotor 436 controller functionally connected to the lower downstream end of the drive shaft with POM 448�means of a coupling device 452, such as a universal joint. The rotation of the rotor controller 436 can be used to change the flow of the fluid when passing through the passage 432 and into the bypass channel 208. Eccentric movement of the rotor 436 controller selectively opens and closes the passage 432 to the lower end of the casing 440. This movement creates pressure pulses over the motor 9, which can be used to create a ripple of the torque motor 9.

Brake 450 can continuously be in contact with the drive shaft 448 in its rotation, as indicated by the arrows. When the pressure of the fluid exceeds a predetermined level, the resistance of the brake 450 can be overcome, allowing the rotation of the rotor controller 436. Brake 450 may have a setpoint by a predetermined resistance, so that the rotor controller 436 may be provided, for example, at a given pressure setpoint. For example, at a given pressure coupling 434a clutch can be actuated, providing adhesion to the rotor controller 436 and effective "clipping" (or closing) of the flow through the regulator 400a. This configuration allows operation of the controller 400a clutch as the clutch "sliding clamp" to control the pressure required for interruption of the fluid flow. Interrupted the flow of fluid can be used to generate rotations�positive "impact".

Fig. 4B shows a spring-loaded regulator 400b mounted on the middle to the mouth of the well the end of the rotor 206 of the engine. Spring controller 400b operates similarly to the controller with a sliding clamp of Fig. 4A, selectively providing the rotation of the rotor controller 436. Spring controller 400b includes a casing 430b controller channel 432 passing through it, the clutch 434b clutch, the clutch 435 casing, the rotor 436 regulator, stator 437 regulator and nozzle 438.

The lower end of the casing 440 430 can be inserted in the middle to the mouth of the well the end of the 442 (or vinciata threaded rear portion) of the rotor 206 of the engine and passes some distance to the mouth of the well from him. The valve plate 200 is mounted contiguous with the near to the mouth of the well the end 442 of the rotor 206 of the engine. The casing of the controller 430b has a tubular housing with clutch 434b clutch mounted on its upper end. The cover 435 clutch is held some distance from the upper end of the casing 430b regulator and tip ends 444. The casing of the controller 430b has a through hole 446, and a casing 435 clutch has openings 447 passing through it to selectively provide fluid passes into the passage 432. When the holes 446 of the housing 430b of the regulator are aligned with holes 447 casing 435 clutch, is provided by the passage of the fluid through the passage 432, che�from the nozzle 438 and in the bypass channel 208, as indicated by the arrows.

Clutch 434b clutch mounted to slide in the casing 435 clutch. Clutch 434b clutch includes a sliding piston 460 and spring 462 mounted on BOSH 464 housing 430b. The rotor 436 regulator is mounted rotatably in the casing and is actuated by a sliding piston 460. The rotation of the rotor controller 436 can be used to change the flow of the fluid when passing through the passage 432 and into the bypass channel 208. Eccentric movement of the rotor 436 controller selectively opens and closes the passage 432 to the lower end of the casing 440 434b. This movement creates pressure pulses over the motor 9, which can be used to create a ripple of the torque motor 9.

Clutch 434b clutch can be selectively actuated, for example, the fluid passing into the housing 430b. The sliding piston 460 is arranged to slide in the passage 432, as indicated by the arrows. The sliding piston 460 to compress the spring 462, when the pressure increases. When the pressure increases, the sliding piston 460 is discharged into the casing 430b, and the holes 446 are moved, somedays with holes 447. This provision can be ensured passage of the fluid through the holes 447 and into the passage 432. In this way, the coupling 434b clutch can otkrivalis� and closed, in response to pressure applied to the regulator 400b. The spring 462 may be formed in such a configuration that a predetermined pressure can overcome the force of the spring 462 and take the sliding piston 460 to the open position. The opening and closing of the regulator 400b sliding piston 460 can be used to interrupt the flow of fluid. Interrupted the flow of fluid can be used to generate rotational "percussion".

In operation controllers 400a, b Fig. 4A and 4B can be used to regulate the flow to the valve plate 200 and/or to the engine 9. Controllers 400a, b can measure the flow rate of the fluid through the bypass channel 208, while using bypass the power section of the engine 9. "Pulsating flow through the bypass channel 434 can be used to generate a peak pressure greater than the pressure on the downhole motor 9. Pressure spikes create a "shock" effect of torque on the bit. Controllers 400a, b can be continuously fluctuating, thus creating a ripple of the stream, or periodically using the coupling 434a, b clutch for such an "issue" that pulsation occurs only when the specified pressure and/or torque. These pulsations can be used to minimize lateral and torsional drillstring vibrations. These pulsations can also use�may provide guidance for the displacement of the material at the drill bit and/or for preventing the sticking-sliding.

Fig. 4A and 4B show a specific clutch, but other clutch with the possibility of selective control over the flow of fluid can be used in the controller, such as sliding, clamping, magnetic effects on the rheology of the fluid, viscous or control mechanisms of another type.

Fig. 5A and 5B schematically shows the transverse and longitudinal section respectively of an alternative plot of the downhole tool 8' with alternative motor 9' and the valve 11' is used in place of the downhole tool 8, the motor 9 and the valve 11 of Fig. 1. Alternative valve 11' is similar to the valve 11 of Fig. 2A except that in this version the valve 11' includes a valve plate (or indexable inserts) 200' with a replaceable tip 216', adjacent to it. Plate 200' of the valve is similar to valve plate of Fig. 3A-3F, except that one of off-center bypass 220' created passing through the middle portion 320'.

The tip 216' is similar to the exchangeable tip 216 of Fig. 2A and 2B except that the tip 216' has a through off-center passage 565', hydraulically communicating with off-center by-pass 220', and a through channel 226', hydraulically communicating with the channel 204' of the rotor. Off-center bypass 220' and the off-center passage 565' are UNECE�Rennie relative to the axis Z of rotation of the replaceable tip 216'.

The tip 216' is connected with the motor 9' and is given to them in rotation. In the configuration of Fig. 5B, the motor 9' is a turbo engine, but may be a conventional drill motor rotating the flow of fluid passing through it. Turbo 9' has a turbine rotor 206', mounted in the casing 202' with the channel 204' of the rotor between them. Turbo 9' has a through the bypass channel 208' for bypassing a part of the fluid passing through it. In some embodiments, the tip 216' may be integral with the turbine rotor 206', so that position data is shown as a unitary element in Fig. 5B. The tip 216' can be directly connected to turbo 9' for rotation with him or not directly connect with turbo motor 9' for rotation with the input components (e.g., suspension rotor 212), as shown in Fig. 2A and 2B.

When operating fluid passes through the channel 226' of the plate 200' of the valve and into the channel 204' of the rotor. The rotor 206' and the tip 216' rotate around z-axis by the flow of fluid passing through the channel 204' of the rotor. During such rotation of the tip 216' rotates adjacent to the plate 200' of the valve. When the tip 216' is rotating, off-center passage 565' in some cases combined with off-center by-pass 220', this creates the hydraulic selective�die message between them. Fluid is held in the off-center by-pass 220', passes through the off-center passage 565' and in the bypass channel 208' in their partial or complete combination. Prevents the passage of fluid through the downhole tool 8' and in off-center bypass 220' through the off-center passage 565' and in the bypass channel 208, when the combination is missing. This selective message creates a shock effect in a manner similar to the selective hydraulic communication of the bypass 220 of Fig. 3A-3E.

Fig. 6 shows a method 600 to control the flow of the fluid flowing through the downhole tool. Method includes installation (670) plate valve upstream from the engine (the valve plate has at least one flow passage and at least one by-pass passage passing through it, wherein the flow passage is hydraulically connected with the channel of the rotor, and a bypass passage selectively hydraulically communicates with a bypass channel when the rotor rotates around the casing and moves the bypass channel to a position in alignment with the bypass passage), rotation (672) of the rotor with the help of drilling fluid passing through the flow passage and into the channel of the rotor, and creation (674) percussion with bypassing a part of the drilling fluid passing through the bypass plate and the bypass channel when PE�auckney channel is moved to the position of alignment, at least part of the bypass passage. The method may also include regulating the supply of fluid to the valve plate. Regulation may include selective flow of fluid in the bypass channel. Percussion action may be axial and/or radial-rotational. The method can be repeated and performed in the required order.

Specialist in the art it should be clear that the methods disclosed herein can be implemented for automated/Autonomous applications using software based on algorithms perform the required functions. These aspects can be implemented by programming one or more suitable General-purpose computers with appropriate aggregate. Programming can be performed using one or more media software, machine-readable by the processor (processors) and preparation of one or more programs of commands executable by a computer to perform the operations described herein. Media programs may be, for example, one or more floppy disks, ROM, CD-ROM or other optical disk, read only memory (ROM) and other storage media known in the art or developed�recovery. The command program can be an "object program", i.e. executed in binary form, computer executable more or less directly, to be of the form "source program" requiring translation or interpretation before execution, or to have some intermediate form such as partially translated program. Specific forms of storage devices-media programs and programming commands are not important here. Aspects of the invention can also be realised with the ability to perform the functions described herein (with appropriate aggregate/software) only at the site of the works and/or remote control via communication networks (e.g., wireless, Internet, satellite, etc.).

Although variants of the implementation described for different variants of implementation and operation, it should be clear that these implementation options are illustrative and that the scope of the invention is not limited. Variations, modifications, additions, and improvements are possible. For example, one or more valves with one or more controllers and/or valve plates can be installed on various types of rotors in the downhole tool.

Components, operations or structures described herein in the singular can have the plural. In General, the structure�s and functionality presented as separate components in the configurations of examples, can be implemented as a combined structure or component. Similarly, structures and functionality presented as a single component, can be implemented as separate components. These and other variations, modifications, additions and improvements may be included in the scope of the invention.

1. Valve to control the flow of drilling fluid through the downhole tool installed in the wellbore extending through a subterranean formation, wherein the downhole tool includes a drill bit at its end and a drilling motor comprising a housing with a rotor rotating in the rotor channel in the casing, when the drilling fluid passes through it, wherein the rotor is provided with a bypass channel for bypassing a part of the drilling mud on it, containing:
valve plate mounted upstream from the engine, wherein the valve plate has at least one flow passage and at least one by-pass passage passing through it, wherein at least one flow passage fluidly communicated with the rotor channel for the passage of drilling mud passing through it, wherein the rotor is rotatably in the casing, and at least one bypass passage selectively fluidly communicated with perepuski� channel when the rotor rotates in the casing, and a bypass channel is selectively moved to a position overlapping at least part of at least one bypass passage for bypassing a part of the drilling mud on it, with a shock effect is generated at the bit.

2. Valve according to claim 1, wherein the rotor is a helical rotor, making the epicyclic motion in the screw stator in the casing.

3. Valve according to claim 1, wherein the rotor is a turbine rotating in a casing.

4. Valve according to claim 3, in which at least one bypass passage is off-center relative to the axis of rotation of the rotor.

5. Valve according to claim 4, wherein the channel of the rotor is off-center relative to the axis of rotation of the rotor.

6. Valve according to claim 1, wherein the valve plate includes a middle portion and an outer ring, at least one needle, forming at least one channel of the rotor between them.

7. Valve according to claim 1, further comprising a nozzle.

8. Valve according to claim 1, further comprising the suspension of the rotor.

9. Valve according to claim 1, further comprising a ring suspension.

10. Valve according to claim 1, further comprising a removable tip.

11. Valve according to claim 10, in which the tip is directly connected to the rotor.

12. Valve according to claim 10, in which the tip is not directly connected to the rotor.

13. Valve according to claim 1, wherein at least one bypass passage contains many of the by-pass passages.

14. Valve according to claim 1, wherein the bypass channel is made with possibility of accommodation in one of the following positions: full alignment, partial alignment, and lack of alignment with the bypass passage.

15. The downhole tool installed in the wellbore extending through a subterranean formation, wherein the downhole drill string has a drill string with drill bit
at its end, and a drilling mud passing through it that contains:
drilling motor mounted in the drill string, wherein the drilling motor comprises:
cover;
the rotor moving in the channel of the rotor in the casing, when the drilling fluid passes through it, wherein the rotor is provided with a bypass channel to bypass it part of the drilling fluid; and
valve mounted upstream from the engine, to control the flow of drilling fluid passing through it, wherein the valve includes:
valve plate mounted upstream from the engine, wherein the valve plate has at least one flow passage and at least one by-pass passage passing through it, wherein at least one flow passage fluidly communicated with the rotor channel for the passage of drilling mud through� him wherein the rotor is rotatably in the casing, and at least one bypass passage selectively fluidly communicated with the bypass channel when the rotor rotates in the casing, and a bypass channel is selectively moved to a position overlapping at least part of at least one bypass passage for bypassing a part of the drilling mud on it, with a shock effect is generated at the bit.

16. The downhole tool according to claim 15, wherein the engine further comprises a helical stator and the rotor, which is
a screw rotor, making the epicyclic movement in it.

17. The downhole tool according to claim 15, which comprises a turbine rotor, rotating around the axis of the downhole tool.

18. The downhole tool according to claim 15, further comprising a controller for selectively throttling the flow in the bypass channel.

19. The downhole tool according to claim 18, wherein the controller functionally connected with the upstream end of the rotor.

20. The downhole tool according to claim 18, wherein the regulator comprises a housing with coupling for selective rotation of the regulating rotor, wherein when the preset pressure regulating rotor selectively provides the passage of the drilling fluid, at least one bypass passage.

21 the Downhole tool according to claim 20, in which the controller includes a retractable piston to selectively allow passage of drilling mud therein and rotation of the regulating rotor.

22. The downhole tool according to claim 20, in which the clutch includes a brake, selectively dispensed to ensure rotation of the regulating rotor.

23. A method of controlling the flow of drilling fluid through the downhole tool installed in the wellbore extending through a subterranean formation, wherein the downhole tool includes a drill bit at its end and a drilling motor, wherein the drilling motor comprises a casing with a rotor rotating in the rotor channel in the casing, when the drilling fluid passes through
it, and the rotor is provided with a bypass channel for bypassing a part of the drilling mud on it, which is:
install valve plate upstream from the engine, wherein the valve plate has at least one flow passage and at least one by-pass passage passing through it, and at least one flow passage is hydraulically connected with the channel of the rotor, and at least one bypass passage selectively hydraulically communicates with a bypass channel when the rotor rotates around the casing and moves the by-pass in combination, at least one bypass passage;
provide�responsible for the rotation of the rotor using the pass drilling mud through, at least one flow passage and into the channel of the rotor; and
create a striking impact with bypassing a part of the drilling fluid through at least one bypass plate and in the bypass channel when the bypass channel is moved to the position overlapping at least part of at least one bypass passage.

24. A method according to claim 23, which further comprising regulating the flow of fluid in the valve plate.

25. A method according to claim 23, in which the regulation contains selective skipping of the fluid in the bypass channel.



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: invention relates to borehole helical motors. This motor consists of two, tope and bottom sections. Each of the latter comprises screw working members built around multistart gerotor mechanism with internal cycloidal engagement. Spindle with output shaft runs in axial and radial bearings. Hinge joint of rotor helical working members with output shaft and fluid passages. Helical working members stator of top section is fixed at drilling string. Bottom section output shaft is coupled with rock cutting tool. Top section output shaft is rigidly coupled with bottom section helical working member stator fitted in adapter bore coupling fixed bodies of spindles and concentrically spinning in adapter radial bearing.

EFFECT: enhanced power characteristics, particularly, higher output shaft rpm.

2 cl, 5 dwg

FIELD: mining.

SUBSTANCE: drill string bottom part assembly comprises downhole motor fitted at said drill string and having rotor and stator. Note here that first hole is made in said rotor. Spindle arranged under downhole motor with second hole made therein. Third hole is made in the shaft with first and second ends. First end is coupled with rotor via first universal adapter. Second end is coupled with spindle via second universal adapter. Inner rod is fitted in the shaft third hole. Note here that inner rod has inner passage and third and fourth ends. Third end seals communication of inner passage with the rotor first hole while fourth end seals communication of inner passage with the spindle second hole.

EFFECT: transducer signal transmission, power supply inside assembly spinning elements.

21 cl, 8 dwg

FIELD: oil and gas industry.

SUBSTANCE: device contains a hollow body with a gerotor screw mechanism inside that includes a stator placed in the body coaxially and a rotor installed inside the stator and the rotor rotation is carried out by fluid delivered by the pump, a transmission section that includes a shaft mounted at the axial bearing made as a multirow thrust and radial bearing and at the upper and lower radial skid bases consisting of the outer and inner sleeves placed in the transmission section body and respectively at the transmission section shaft; the transmission section shaft is fixed at the input by a drive shaft with a rotor and at the output it is fixed with a chisel; the motor is equipped with the upper collar grab consisting of a shaft, a thrust and a nut and the lower collar grab made as a fishing collar with the outer fishing clamp, a thrust collar and the lower threaded crossover with an inner fishing clamp; the upper collar grab is fixed to the upper part of the gerotor screw mechanism while the lower collar grab in mounted at the transmission section shaft between the inner sleeve of the lower radial bearing and the axial bearing made as a multirow thrust and radial bearing. The transmission section shaft and the fishing collar of the lower collar grab with the outer fishing clamp are fixed rigidly with each other by means of a common thread thus providing tightness at butt ends of the thrust collar placed between butt ends of the fishing collar and the inner collar of the lower radial skid base. Cross-threading direction of the transmission section shaft and the fishing collar of the lower collar grab coincide with the direction of drill string rotation during tripping out.

EFFECT: improving accident-free operation, service life and reliability of motors, accuracy of hole making and the rate of parameters set for the hole curvature and passing ability.

5 cl, 2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises measuring the pressure in injection line with loaded and idle bit and maintaining constant measured differential pressure. Note here that maximum tolerable bit feed speed (Vtf) is defined by mathematical formula. Then, bit feed speeds are defined and in case it exceeds said maximum tolerable magnitude it is decreased to Vtf.

EFFECT: higher efficiency of drilling.

2 dwg

FIELD: mining.

SUBSTANCE: invention refers to drilling equipment, and namely to downhole motors for well drilling. A spindle includes a housing, a throttle and a shaft with a through axial channel, which is installed in the housing with possibility of axial movement within the limits of a guaranteed play. Between three sealed radial supports there installed are two sections of a multistage bearing plate to take an axial load in downward and upward directions. Each stage of the bearing plate consists of discs with supply hydraulic channels and flow centre plates, the rubber elements of which have annular chambers forming together with discs the thrust hydrostatic bearings. A throttle is replaceable and installed in an axial channel of the shaft. Diameter of the throttle pass for creation of pressure drop is chosen in compliance with an expected hydraulic load on the axial support in start-up operating mode of the motor. On outer surface of the shaft there are blind longitudinal slots hydraulically connecting in a separate manner a cavity above upper radial support to annular chambers of the upper section of the bearing plate and a cavity above the middle radial support to annular chambers of the lower section of the bearing plate. The cavity above lower radial support is hydraulically interconnected with the shaft axial channel below the throttle.

EFFECT: improvement of a motor structure.

1 cl, 3 dwg, 2 tbl

FIELD: oil and gas industry.

SUBSTANCE: unit to control power load onto working elements of a screw downhole motor comprises a half-coupling with radial and axial through channels, a spring-loaded container installed in the axial through channel of the half-coupling with a hydraulic monitor attachment, a burnisher of alternating cross section, installed as capable of axial displacement, a spring and seals. It also comprises a hollow pressing nut installed in the axial through channel of the half-coupling for interaction with the spring-loaded container and with an inner ledge made in the axial through channel of the half-coupling or the burnisher. The burnisher is made in the form of a replaceable tip installed onto the stem.

EFFECT: makes it possible to increase efficiency, reliability and durability.

3 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: motor includes a housing with a rotor arranged inside it, the rotation of which is performed by the fluid medium supplied with a pump, as well as a spindle housing with a shaft arranged inside it, which is installed on radial and axial sliding supports. The spindle shaft is attached to the motor rotor and a bit. Some amount of fluid medium is pumped through radial and axial sliding supports, and axial support of the spindle is made in the form of two pairs of rotor and stator rings with an annular row of thrust modules, which is fixed in each of them. Stator rings are fixed in the spindle housing, rotor rings are installed on the spindle shaft, and each thrust module includes layers of polycrystalline diamonds on the edge facing the edges of adjacent modules, and contacts in turn with one or two edges of adjacent modules. The motor includes a splined bush with external splines, which is installed on the spindle shaft, and two elastic damping supports arranged on the edges of the splined bush and receiving axial forces acting on the axial support of the spindle. Each elastic damping support contacts the rear edge of the corresponding rotor ring with the fixed annular row of thrust modules, and rotor rings with annular rows of thrust modules fixed in them are provided with internal splines corresponding to external splines of the splined bush, and each of them is installed with possibility of annular distortion of the rotor ring with the annular row of thrust modules, which is fixed in it, relative to its own elastic damping support.

EFFECT: increasing service life and improving reliability of the axial sliding support of the spindle of the hydraulic downhole motor with thrust modules; improving accuracy of curvature parameters of the well shaft; enlarging the hole boring per bit run using hydraulic jars in the tubing; increasing the increase rate of curvature parameters of wells, and reducing stresses in the layout of the bottom of the drill column and downtime of the drilling unit.

6 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: device includes frame 2, powder brake 3, kinematic chain A between outlet shaft of HBM 1 and rotor 4 of powder brake 3, hydraulic baffle plate 5, monitoring and testing unit 6 and date control and processing unit 7. Kinematic chain A is made in the form of gear-type conical multiplier 8 with coupling clutches 9, 10 in connections of its shafts 11 and 12 with outlet shaft B of HBM 1 and rotor 4 of powder brake 3. Hydraulic baffle plate 5 is made on cover plate 13 of multiplier 8 in the form of an annular reservoir enclosing with seal 14 the lower part of housing B of HBM 1.

EFFECT: improving accuracy and enlarging the HBM loading range at testing, and possibility of stand-alone use.

1 dwg

FIELD: machine building.

SUBSTANCE: invention is used for run-in and test of hydraulic bottomhole motor (HBM). When testing HBM 1, it is installed in a vertical position above well 2 of its further operation and attached to housing A by means of spinning wrench 3 on stationary drilling outfit 4 of well 2. Outlet shaft 5 of spindle 6 of HBM 1 is attached through coupling device 7 to inlet shaft 8 of multiplier 9 installed on rotary table 10. Rotation of rotor 11 with spindle 6 is performed by injection of working fluid to HBM 1 through adapter 12 of pump station 13 of drilling outfit 4 of well 2. Mechanical loading of outlet shaft 5 of spindle 6 is performed through multiplier 9 kinematically connected at its outlet shaft 15 to powder brake 17, with further measurement and analysis of revolutions and braking moments at the outlet of the latter, and flow rate and pressure of working fluid at HBM 1 inlet.

EFFECT: improving accuracy of the method and its approximation to HBM operating conditions.

1 dwg

FIELD: machine building.

SUBSTANCE: invention is used for run-in and test of hydraulic bottomhole motor (HBM). Bench includes drive device 2 having pump station 3, pressure line 4 and assembly 5 for attachment of HBM 1, loading device 6 having frame 7 and powder brake 8 kinematically connected to outlet end of HBM 1, monitoring and testing unit 9 and data control and processing unit 10. Loading device 6 is equipped with conical multiplier 11 with hollow inlet shaft 12 located normally to base 13 of frame 7. HBM 1 is installed in cavity 14 of inlet shaft 12 of multiplier 11 with outlet end with chisel 15 conjugated with half-coupling 16 made with cams A for chisel 15 at inlet shaft 12 of multiplier 11, the outlet shaft 17 of which is kinematically connected to rotor 19 of powder brake 8. Loading device 6 is fixed on rotary table 20 coaxially to inlet shaft 12 of multiplier 11. Drive device 2 is made in the form of a stationary drilling rig of well 21.

EFFECT: increase in testing accuracy and approximation of the bench design to HBM real operating conditions.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method consists in movement of a housing of a continuous circulation tool to an adapter having a channel passing through it and intended for connection in a pipe string in the well and selective movement of drilling fluid between the housing and a side hole in the adapter; in addition, the continuous circulation tool includes a shutoff device, and actuation of a shutoff mechanism to introduce a shutoff element of the shutoff device through the side hole in the adapter for insulation of drilling fluid flow through at least one section of the channel. A system for carrying out well operations with continuous circulation of drilling fluid, which contains a continuous circulation tool interconnected with a tubular column of the well, which contains an adapter and is intended for selective shutoff of the drilling fluid flow to tubular column of the well, a pipe manipulating device near the adapter, which contains the following: a pipe wrench, pipe wrenches, a pipe wrench, a retaining wrench, a pipe wrench and a spinning wrench and a device for mechanised suspension and unscrewing of pipes.

EFFECT: maximum drilling speed.

34 cl, 27 dwg

FIELD: oil and gas production.

SUBSTANCE: device comprises a spring-loaded stop element, an elastomer seat with guide ribs, collars with central holes, valve seats. The valve is installed in the nipple of the hinged joint or torsion bar of the spindle in a screw bottomhole motor, in which holes are made for possible passage of a working medium.

EFFECT: simplified design, higher reliability.

6 cl, 6 dwg

Shaker machine // 2442876

FIELD: mining equipment.

SUBSTANCE: The invention relates to mining equipment, in particular, to shaker machines which create oscillations in liquid during direct and indirect flushing of mining equipment and well bottom, during bed stimulation and discharge of producing energy. The device comprises a frame where a rotatable crankshaft is installed on the axis. Furthermore, valves are fixed with pins at both ends of the crankshaft. The installation of valves at upper and lower part of the crankshaft allows to oscillate the liquid in both directions during direct and indirect flushing. The lower valve creates a hydraulic resistance to the liquid flow, reduces oscillation frequency for the upper valve, thus increasing the oscillation amplitude of the liquid.

EFFECT: production of the said device.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: borehole circulation adapter or valve includes tubular housing having external hole and valve piston installed with possibility of sliding inside the housing. Primary fluid medium flow trajectory passes through internal delivery orifice of the housing and valve piston. In the first position the valve piston covers the external opening for decoupling with fluid medium between internal delivery orifice and annular gap of well shaft. In the second position the valve piston moves to lock the internal delivery orifice and connect the external opening to internal opening and to establish the connection by means of fluid medium between internal delivery orifice and annular gap of the well. Dividing mechanism is fixed between the housing and valve piston for direction of movement of valve piston between the first and the second positions. In the versions of the implementation the dividing mechanism includes turning element.

EFFECT: random fluid medium circulation inside the well shaft, possibility of continuous operation of the valve and reduction of the valve stroke.

24 cl, 13 dwg

FIELD: oil and gas production.

SUBSTANCE: back valve consists of case with seat, and of locking device installed in bore, interacting with seat and equipped with spring elements in form of two plate springs. The locking device has two locking elements made of halves of circular cylinder by section of each with two mutually transverse inclined surfaces, upper one of which is inclined at angle below 90° to plane of cylinder circumference, while the side surface is inclined at the same angle to its axis. Upper ends of the locking elements interacting with the seat and their side interacting surfaces are covered with elastomer. A unit of fixation of locking and flexible elements in the case is made in form of a ring secured in the bore of the case.

EFFECT: simplified design, raised reliability and expanded functionality at minimal overlapping area of pass-through channel.

5 dwg

FIELD: oil and gas production.

SUBSTANCE: circulating valve consists of coaxial case and piston inter-engaged by means of pins and slots. The first system consists of a case, of a closer with channels communicating an internal cavity of the system with annular space of a well, of a packing, of an upper and lower arresters of piston travel; while the piston system consists of the piston with a throughput channel and a packing, of a valve switch with radial channels and of a compression spring. The throughput channel of the piston converges at an inlet section and diverges at an outlet section. At a section of maximal convergence a bypass channel is made in the piston; the channel hydraulically communicates the throughput channel with a behind-the piston cavity.

EFFECT: reliability of valve, reduced output of hydraulic power for drilling and hole conditioning.

4 cl, 9 dwg

FIELD: oil and gas production.

SUBSTANCE: valve consists of cylinder case with stepped hole and radial (overflow) hole. There can be several overflow holes. A holder in form of a segment is installed in the stepped hole of the case. In the holder there is made a cylinder cavity wherein there is installed a seat, ball, and a return spring positioned between a bottom of the cylinder cavity and the ball pressing the ball to a stop made in form of a cage with lengthwise holes for liquid flow. The seat is set in the stepped hole of the cylinder cavity and is clutched with the stop installed in the holder, by means, for example, of threaded connection. A threaded radial hole coaxial to the radial hole of the case for flow of liquid is made in the holder. A screw with filtering holes and a hole for flow of liquid is screwed into the holder through the radial hole of the case. The screw maintains the holder in radial and axial directions.

EFFECT: raised reliability and resource of valve operation.

2 cl, 3 dwg

Check valve // 2393326

FIELD: mechanics.

SUBSTANCE: check valve includes body with axial channel, seat, cover with rocker arm, which is suspended on the axis. Axis with elastic coating is installed in the body hole and in holes of protrusions of the rocker arm of the cover pressing the spring to the seat. The seat is formed with the seat bushing and the seat cup from elastic material. Inner groove of the body is provided with annular slot, and outer part of the seat cup is L-shaped and has a ring protruding towards the annular slot. Seat bushing is cylinder-shaped and made in the form of thin-wall ring and is intended for attachment of the seat cup. Body is cylinder-shaped and has two openings located opposite each other between one of the ends of the housing and middle part of the body.

EFFECT: simple design, improved operating reliability, and easy installation and removal.

2 dwg

FIELD: mining.

SUBSTANCE: invention relates to drilling technique and can be used as a valve unit for screw-type downhole motors in a drilling pipe string for connection or disconnection of the internal cavity of drilling pipes and the annular space following the pre-set technological sequence. The valve contains a case, a valve pair provided with a sliding ring, the seat mounted in the case and a hollow plunger accommodated inside the seat, with radial holes in them, a spring mounted on the hollow plunger and gaskets. The valve pair is of the slide type, in which the diameter of the flowing channel is 0.10-0.12 of the length of the hollow plunger and the area of all radial overflow holes of the hollow plunger is equal to the area of flow channel in the cross-section of the hollow plunger. The hollow plunger is of cylindrical form with the sliding ring and the circular collar, located in the lower part of the sliding ring and spring-loaded up to the stop by the upper end of the circular collar to the lower end of the seat. Radial overflow holes of the hollow plunger and the radial holes in the seat and in the case are located at the same level and the spring is mounted between the case stop and the lower end of the circular collar of the hollow plunger.

EFFECT: high reliability of operation of the valve in the process of drilling, excluding spill of flush fluid during lifting the drilling pipe string and filling the internal cavity of pipes during dropping.

2 dwg

Well drilling rig // 2271435

FIELD: mining industry, particularly well drilling with direct or reverse circulation of mud, as well as well repair.

SUBSTANCE: rig comprises double pipe string with annular cavity defined in-between and jet device provided with check valve. The injection device is formed as body connected with inner pipe string. The body is provided with radial channels and annular nozzle set having receiving channels. The receiving channels are aligned with the radial channels to supply compressed air through annular nozzles in annular space at an angle to jet device axis.

EFFECT: increased pulp lifting capacity due to improved efficiency of pulp mixing with compressed air.

4 cl, 1 dwg

Well drilling rig // 2271435

FIELD: mining industry, particularly well drilling with direct or reverse circulation of mud, as well as well repair.

SUBSTANCE: rig comprises double pipe string with annular cavity defined in-between and jet device provided with check valve. The injection device is formed as body connected with inner pipe string. The body is provided with radial channels and annular nozzle set having receiving channels. The receiving channels are aligned with the radial channels to supply compressed air through annular nozzles in annular space at an angle to jet device axis.

EFFECT: increased pulp lifting capacity due to improved efficiency of pulp mixing with compressed air.

4 cl, 1 dwg

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