Hydraulic downhole motor

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

 

The invention relates to hydraulic actuators for rotary drilling, placed in the wells, and can be used in the rotary drilling of lateral horizontal wells oil wells screw gerotor hydraulic motors.

Known hydraulic downhole motor, containing a hollow body placed inside the drive rotor and spindle mounted inside the spindle for axial and radial bearings with chisel and coupled to the driving shaft with the rotor section of the motor and spindle are connected by curved threaded subs, and the rotor and the spindle is connected to the drive shaft, provided with the master and the slave hinge nodes with axial bearings slip through threaded adapter spindle body with cross-connector between the axial and radial bearings by bit, the spindle is made with an annular groove in the plane of the transverse connector housing of the spindle, in the groove installed split ring whose diameter exceeds the diameter of the spindle, inside the fixed spindle supporting sleeve and the ring-car safety and radial bearing housing spindle with hand chisels made in the form posted on the removable sleeve and secured inside the spindle elastic sliding bearing, the distance between the axial bearings of the drive shaft does not exceed the length of the axial bearing spindle (EN 2232859, 20.07.2004).

The disadvantage of this engine is the fulfillment of the spindle shaft 6 with the annular groove 23 located between the lower radial support 9 and the axial bearing 10, which reduces its cross-section increases the maximum value of the transverse stresses arising from the action of bending moments bits on the shaft of the spindle when using the engine in a managed layout of the bottom of the drill string in the areas of curvature wells.

The disadvantages of this engine are also the deterioration of the cooling of the lower radial sliding bearing is pumped mud, incomplete, the possibility of increasing the life and reliability of the spindle motor, to reduce accidents when lifting downhole motor from wells during the drilling of directional and horizontal wells, as well as incomplete the possibility of increasing the accuracy of the borehole and rate of curvature parameters wells, improve cross, i.e. reduce the resistance and voltage in the layout of the bottom of the drill string when using the engine in a managed layout of the bottom of the drill string in the areas of curvature wells.

Known gerotor hydraulic motor, containing a hollow body placed inside multiple gyratory mechanism comprising coaxially located the commutator and mounted inside the stator, the rotor, and a spindle comprising a spindle shaft is placed in the bearings of the rotation of the spindle body and coupled to the input drive shaft with the rotor, and the output from the bit, and the housings of the motor and spindle are connected by a bent sub with threads on its edges (EN 2162132, 20.01.2001).

A disadvantage of known construction is incomplete, the possibility of use in the rotary drilling of lateral horizontal wells oil wells due to the fact that the spindle body from its end directed to the bit, has a circumferential edge of the covering with a clearance of the spindle shaft and the spindle shaft has a circumferential collar located between the support rotation and a circumferential edge, with a circumferential collar on the shaft of the spindle and the circular edge in the spindle body made according to the type of continuous mating between a chamfer, the direction of screwing of the shaft and the housing of the spindle opposite to the direction of rotation of the spindle shaft".

A disadvantage of the known construction is explained by "unscrewing" destroyed (cut off) of the hollow shaft 4 of the spindle with the sleeve 8 and the bit (not shown) on the threads 17 of the thread 18 in the circumferential edge 15 in the spindle body 6 in the destruction of the shaft 4 of the spindle above the end face 16 due to the fact that the drill string when lifting from wells on the drilling rigs in the Russian Federation rotate to the right the mouth of the rum drilling rig, for example, EU with respect to the table of the rotor, while the bit and the spindle shaft is permanently lost in the well.

Another disadvantage of the known construction is incomplete, the possibility of reducing the distance from the bit to the lower radial bearing slide ("departure" bit)that does not provide the possibility of increasing the life and reliability of the spindle sections, as well as increase the accuracy of the borehole.

Known hydraulic downhole motor, comprising a housing placed inside the rotor, a rotatably carried out by pumping flow of fluid, a spindle body placed inside the shaft of a spindle mounted on the axial support made in the form of radial multi-row bearing, and the upper and lower radial slide bearing, a threaded sub, sealed housings of the motor and the spindle, with the spindle shaft includes extractor collar, connected to the drive shaft with the rotor and connected with the bit and the screw housing fixed spindle nut made with the fishing zone, with the spindle shaft is made with centering spigot and threaded located between the lower radial sliding bearing and the output shaft part, designed for fastening bits, grabs the collar is made in the fishing ring mounted on the center is the dominant band of the spindle shaft, on the shaft of the spindle set screw bushing, fixing the fishing ring, grabs the belt nuts are made with grooves, the width and the diameter of which exceeds, respectively, the thickness in cross section and the diameter of the fishing ring within the nut is made of a ring cavity, soamsawali with grooves fishing zone, and the diameter of the annular cavity exceeds the diameter of the fishing clamp fishing in the ring (RU 2367761, 20.09.2009).

A disadvantage of known construction is incomplete, the possibility of reducing the distance from the bit to the lower radial bearing slide ("departure" bit), which affects the resource reference node, and lack of possibility to reduce accidents when lifting downhole motor with a column of drill pipe from a lateral horizontal wells oil wells, improve the accuracy of penetration and rate of curvature parameters as well as improve the permeability, i.e. reduce the resistance and voltage in the layout of the bottom of the drill string when using the engine in a horizontal driven layouts of the bottom of the drill string in the areas of curvature wells.

Known hydraulic downhole motor with a diamond sliding bearing, comprising a housing of the motor placed inside the rotor and the spindle body placed inside the shaft, the mouth is fixed in the radial and axial slide bearing, the spindle shaft is connected to the drive shaft with the motor rotor and sealed with a chisel, some fluid pumped through the radial and axial sliding bearing and the axial bearing is made in the form of two pairs of rotor and stator rings are fixed in each of them a ring next thrust modules, the stator ring is bonded with the spindle body, a rotary ring fastened to the shaft of the spindle, and each thrust module contains a layer of polycrystalline diamond on the end facing the end faces of adjacent modules, and in turn is in contact with one or two ends of adjacent modules (US 4620601, Nov.4, 1986).

A disadvantage of the known design is the execution of the spindle shaft without fishing collar, and nipple - no fishing zone, which excludes the possibility of lifting with a column of drill pipe from a lateral horizontal wells oil wells in the destruction of the spindle shaft.

Closest to the claimed design is a hydraulic downhole motor, containing a hollow body placed inside the gyratory mechanism comprising coaxially located in the housing, the stator and mounted inside the stator, the rotor and the spindle section including a shaft with an axial bearing is placed in the upper and lower radial bearings comprising inner and outer sleeves and accommodated in the housing, the spindle section, is coupled to the input drive shaft with the rotor, a bottom sub with a chisel, adjustable crossover, installed between the gyratory mechanism and the spindle housing section, while the engine is equipped with top emergency device consisting of a shaft, the stop and nuts, and lower emergency device made in the form of shaped sleeve, the top emergency response unit connected to the rotor of the gerotor mechanism, and the lower emergency device is mounted on a shaft section and located between the inner sleeve of the lower radial bearing and axial bearing, the spindle shaft section has a circumferential collar, and figured bushing - inner and outer circumferential clamps, with circumferential shaft collar spindle section and the inner collar curly sleeves are made in the form of a screw thread with a direction opposite to the rotation shaft of the spindle sections, with emphasis County spindle shaft collar section of the inner collar curly hub, and the outer collar curly sleeve abuts against the axial end face of the lower sub, while the outer sleeve of the lower radial bearing fixed to the housing bottom of the sub so that the extreme end surface of the radial bearing and the housing bottom sub match (RU 2299302, 20.05.2007).

The disadvantages of the known hydraulic downhole motor are not what Ana the opportunity to reduce accidents in the rotary drilling of lateral horizontal wells oil wells, essentially, when lifting with the rotation of the drill string with the bit at fracture of the shaft of the spindle sections, incomplete, the possibility of increasing the life and reliability of the engine, increase the accuracy of the borehole and rate of curvature parameters as well as improve cross, i.e. reduce the resistance and voltage in the layout of the bottom of the drill string.

The main disadvantage of the known construction is explained by the fact that "the district spindle shaft collar section and the inner collar curly sleeves are made in the form of a screw thread with a direction opposite to the rotation shaft of the spindle section, as a consequence, the direction of the screw thread of the outer collar curly bushing lower emergency unit mounted on a shaft section and located between the inner sleeve of the lower radial bearing and axial bearing, does not coincide with the direction of rotation of the drill motor and bit when climbing out of the well.

The drill string when lifting from wells on the drilling rigs in the Russian Federation in the rotary drilling of oil wells with a screw gerotor hydraulic motors rotate the rotor of the drilling machine, for example, AU right (right thread pipe of the drill string), consequently, in the known construction is loosening the ruin is authorized part of the hollow shaft 4 spindle section with the sleeve 8 and the bit (not shown) on the threads 17 of the thread 18 in the circumferential edge 15 in the housing 6, the spindle section at fracture of the shaft 4, the spindle section above the end face 16, and destroyed part of the spindle shaft section and the bit will be lost in the well.

Another disadvantage of the known designs is the location of the thread and groove (stress) on a shaft section (diameter, a smaller diameter inner sleeve of the lower radial bearing) between the axial and lower radial bearings (in a dangerous section), which weaken the spindle shaft section, reduce the strength and fatigue endurance of the shaft from the maximum values of the transverse stresses resulting from bending moments bits on a shaft section when passing through the radial sections of the wellbore, and when worn bearing axial bearing (Pets axial play of the spindle shaft sections, for example, up to 5.5 mm).

This embodiment of the emergency device increases the stress ratio in bending (Stress ratio, the ratio of variable amplitude voltage to secondary voltage)increases the likelihood of fracture of the shaft of the spindle section between the axial and lower radial bearings, and when the destruction of the spindle shaft section of the circular zone "and" the bit and the shaft is permanently lost in the well.

Another disadvantage of the known construction is performing figured sleeve 24 with the inner 27 and outer 28 district fishing collars that HC is increases the diameter of the spindle section or reduces the strength of the fishing shoulders and dangerous section of the shaft of the spindle section at the location of the emergency device between the inner sleeve of the lower radial bearing and axial bearing ring belt and between the belt and the lower radial sliding bearing 9.

This is due to the need for dual "overlap" (requires a minimum overlap of 45 mm) fishing shoulders: the district collar "b" spindle shaft section and the inner collar 27 figure bushing 24, and "overlay" district collar figure 28 of the sleeve 24 relative to the end face 29 and the inner diameter of the lower sub 30.

The life and reliability of the spindle sections are determined by the wear of the axial bearing spindle shaft section, made in the form of radial multi-row bearing, (Pets axial play of the spindle shaft sections, for example, up to 5.5 mm), and the wear on the bottom of the radial sliding bearing, (Pets radial clearance of the shaft of the spindle sections, for example, not more than 1,55 mm), and when exceeding the radial play of shaft spindle section in the lower radial bearing is not allowed lateral horizontal wells drilling oil wells.

The disadvantages of the known construction is also due to the higher value of the stress ratio in the radial slide bearing and radial multi-row bearing spindle shaft section (Stress ratio, the ratio of variable amplitude voltage to the average voltage)is essentially equal to (5,47,8), and is also likely to address the Oia resonant vibrations and ' frozen ' under the action of the maximum axial and radial loads (bits) in a curved string of drill pipe, with the change of sign of the axial load acting on the radial multi-row bearing.

The technical result of the invention is to reduce the accident rate when using hydraulic downhole motor in the layout of the bottom of the drill string to the rotary drilling lateral horizontal wells oil wells, increasing the life and reliability of the engine, improving the accuracy of the borehole and rate of curvature parameters as well as the increase of permeability, i.e. the decrease in the resistance and voltage in the layout of the bottom of the drill string due to the rigid fastening of the shaft of the spindle sections and sleeve fishing bottom fishing devices are interconnected using a common thread with providing tension on the ends of the thrust ring located between the ends of the extractor sleeve and inner sleeve of the lower radial sliding bearing, and the fact that the direction of screwing of the threaded spindle shaft section and sleeve fishing bottom fishing device coincides with the direction of rotation of the drill string when climbing out of the well.

This technical result is achieved by the hydraulic downhole motor, which during operation can be used in a drill string for rotary drilling, containing a hollow body, located inside the city of the rotary screw mechanism, includes coaxially located in the housing, the stator and mounted inside the stator, the rotor, the rotation of which is pumping flow of fluid, spindle section, which includes a shaft mounted on the axial support made in the form of radial multi-row bearing, and the upper and lower radial slide bearing comprising inner and outer sleeves, accommodated in the housing, the spindle sections, respectively, on a shaft section, the shaft of the spindle sections are fastened on the input drive shaft with the rotor, and the output is connected with the bit, the engine is equipped with top fishing device comprising a shaft, a stop and nuts, and lower the fishing device made in the form of extractor sleeve with outer fishing collar, thrust ring and the lower threaded adapters with internal fishing clamp, top fishing device is bonded with the upper part of the rotor screw screw mechanism, and the bottom fishing device is mounted on a shaft section between the inner sleeve of the lower radial bearing and axial bearing, made in the form of radial multi-row bearing according to the invention the spindle shaft section and sleeve fishing bottom fishing device with external fishing collar rigidly connected to each other through a common rez who would be able to provide tension on the ends of the retaining ring, located between the ends of the extractor sleeve and inner sleeve of the lower radial sliding bearing when the direction of screwing of the threaded spindle shaft section and sleeve fishing bottom fishing device coincides with the direction of rotation of the drill string when climbing out of the well.

The diameter D of the internal fishing zone in the lower threaded sub and the outer diameter D1fishing clamp sleeve fishing bottom fishing device connected by the relation: D=D1-(0,030,05)D.

The retaining ring lower radial sliding bearing is made with an outer collar in contact with the inner sleeve of the lower radial sliding bearing, the diameter of the outer collar thrust ring does not exceed the outer diameter of the inner sleeve of the lower radial sliding bearing.

The outer sleeve of the lower radial sliding bearing and the lower threaded sub made in the form of a uniform design with hard-alloy plates, and the plates are made of solid alloy is installed in the inner bore of the lower threaded sub and bonded together by impregnation of a solid alloy components ligament-solder.

The molten powder ligament-solder for mounting hard-alloy plates in the lower threaded sub contains components in the following ratio, wt.% Ni 3247, Fe 2, Cr 714, Si 2, WC rest.

The performance of hydraulic downhole motor such that the shaft of the spindle sections and sleeve fishing bottom fishing device with external fishing collar rigidly connected to each other through a common thread with the possibility of providing tension on the ends of the thrust ring located between the ends of the extractor sleeve and inner sleeve of the lower radial sliding bearing when the direction of screwing of the threaded spindle shaft section and sleeve fishing bottom fishing device coincides with the direction of rotation of the drill string when lifting from the well, provides a reduction in accidents when using hydraulic downhole motor when lifting with the rotation of the drill string with the bit of sidetrack wells in the destruction of the spindle shaft increases the life and reliability of the engine, the accuracy of the borehole and the rate of curvature parameters as well as ensuring a higher permeability, i.e. reduces the resistance and voltage in the rotary drilling of lateral horizontal wells oil wells when worn bearing axial bearing spindle section, made in the form of radial multi-row bearing for which Pets axial play of the spindle shaft sections, for example, up to 5.5 mm

This embodiment of spin the preliminary section of hydraulic downhole motor reduces the value of the stress ratio in the radial slide bearing and radial multi-row bearing spindle shaft section (Stress ratio, the ratio of variable amplitude voltage to the average voltage)is essentially equal to (3,14,5), reduces the likelihood of resonant vibrations ' frozen ' under the action of the maximum axial and radial loads (bits) in a curved string of drill pipe, with the change of sign of the axial load acting on the radial multi-row bearing, when the rotary drilling of lateral horizontal wells oil wells, and in the destruction of the spindle shaft section of the bit and the spindle shaft section freely lifted from the well with the right rotation of the drill pipe string.

The performance of hydraulic downhole motor such that the diameter D of the internal fishing zone, fixed in the housing, the spindle section of the lower screw of the sub, and the outer diameter D1fishing clamp sleeve fishing bottom fishing device connected by the relation: D=D1-(0,030,05)D, provides the minimum overlap of the fishing zone fishing in the sleeve above the fishing clamp the lower threaded sub, reliable retention ragged spindle shaft section with a chisel under the given outer diameter of the threaded connection of the spindle housing section and the lower threaded sub, prevent shear and crushing fishing clamp fishing in the sleeve.

Done is the hydraulic downhole motor so that the retaining ring is made with an outer collar in contact with the inner sleeve of the lower radial sliding bearing, the maximum diameter of the outer collar thrust ring does not exceed the outer diameter of the inner sleeve of the lower radial sliding bearing, simplifies replacement and repair of components bearing axial and radial bearings in the formulation of the resource reduces the maximum value of transverse stresses resulting from bending of the shaft of the spindle section with a chisel, and the probability of fracture of the shaft of the spindle section in the area between the axial and lower radial bearings spindle section, and also increases the strength and fatigue endurance common threaded connection of the shaft of the spindle sections with the fishing sleeve when passing through the radial sections of the wellbore under conditions of friction and rotation in the wellbore.

The performance of hydraulic downhole motor such that the outer sleeve of the lower radial sliding bearing and the lower threaded sub made in the form of a uniform design with hard-alloy plates, and the plates are made of solid alloy is installed in the inner bore of the lower threaded sub and bonded together by impregnation of a solid alloy components ligament-solder, with the melted powder ligament-solder for mounting plates of the solid alloy in the lower threaded sub contains components in the following ratio, wt.%: Ni 3247, Fe-2, Cr 714, Si 2, WC rest, increases the life and reliability of the engine, the accuracy of the borehole and the rate of curvature parameters as well as ensuring a higher permeability, i.e. reduces the resistance and voltage in the rotary drilling of lateral horizontal wells oil wells, essentially, when you wear the lower radial sliding bearing, for which Pets radial clearance of the shaft of the spindle sections, for example, not more of 1.55 mm, and when exceeding the radial play of shaft spindle section in the lower radial bearing is not allowed lateral horizontal wells drilling oil wells.

This technical result also provides the use of a bit of the same diameter in two related dimensions of the BHA, although the increase of the outer diameter of the housing at the bottom of the spindle requires switching to a larger diameter bits.

Below gyratory screw hydraulic motor DRU-RS with a shorter spindle section, angle regulator, a chisel, the upper and lower downhole catching used for rotary drilling lateral horizontal wells oil wells.

Figure 1 shows a longitudinal section of a gyratory screw hydraulic motor with the spindle section, angle regulator, the upper and lower downhole catch the spruce and chisel.

Figure 2 shows the element I in figure 1 the bottom of the fishing device, the spindle section.

Hydraulic downhole motor includes a hollow body 1 is fixed inside the lining of the elastomer 2 and placed in the plate 2 of the housing 1 screw multiple rotor 3, the planetary rotary rotation of the rotor 3 is carried out and pump the fluid 4, block 5 of the spindle section 6 placed inside the shaft 7 of the spindle section 6, mounted on an axial bearing 8, made in the form of radial multi-row ball bearing 9, and the upper 10 and lower 11 radial slide bearing, consisting of the outer sleeve 12 and inner sleeve 13 of the upper radial bearing 10 of the slide, and accordingly, from the bottom of the threaded sub 14 and inner sleeve 15 of the lower radial bearing 11 slides, placed, respectively, in the housing 5, the spindle section 6, in the lower threaded sub 14 and the shaft 7 of the spindle section 6, shown in Fig.1, 2.

The shaft 7 of the spindle section 6 is bonded to the inlet 16 drive (cardan) shaft 17 with the rotor 3 by means of a threaded connection 18 with the output housing 19 of the propeller shaft 17, as by a threaded connection 20 of the input housing 21 of the propeller shaft 17 connected with the output part 22 of the rotor 3, at the output 23 of the shaft 7, the spindle section 6 is bonded with a chisel 24 Ave the means of a threaded connection 25, shown in figure 1, 2.

The engine is equipped with top of the fishing device 26 consisting of a shaft 27, the stop 28 and nuts 29 and provided with a bottom, a fishing device 30 made in the form of extractor sleeve 31 with the fishing collar 32 and the thrust ring 33 at the top of the fishing device 26 is rigidly fastened by means of threads 34 with the upper part 35 of the rotor 3 gyratory screw mechanism, and the lower the fishing device 30 mounted on the shaft 7, the spindle section 6 between the inner sleeve 15 of the lower radial bearing 11 and the axial bearing 8, made in the form of radial multi-row bearing 9 shown in figure 1, 2.

In addition, figures 1, 2 shows: pos.36 - extra thrust ring located between the end 37 of the inner sleeve 15 of the lower radial bearing 11 and the end 38 of the shaft 7, the spindle section 6; 39 - plates are made of solid alloy, bonded by impregnation of a solid alloy components ligament-solder in the lower threaded sub 14, while the outer sleeve lower radial sliding bearing and the lower threaded sub 14 is in the form of a uniform design with hard-alloy plates; POS - plates are made of solid alloy, bonded by impregnation of a solid alloy components ligament-solder the internal sleeve 15 lower radial bearings 11 slip.

The hardness of the plates 39, 40, for example, carbide ka the bid tungsten-cobalt, is (8992) HRA, the thickness of the plates is (2,5 0,5) mm, the molten powder ligament-solder for mounting plates 39, 40 of the solid alloy contains components in the following ratio, wt.%: Ni 3247, Fe-2, Cr 714, Si 2, WC rest, the hardness of the material formed by impregnating a solid alloy components ligament-solder, is (5265) HRC shown in figure 1, 2.

The shaft 7 of the spindle section 6 and grabs the sleeve 31 with the fishing clamp 32 bottom fishing device 30 rigidly connected to each other through a common thread 41 with the possibility of a tension 0,130.33 mm on the ends 42, 43 of the thrust ring 33 located between the end face 44 of the fishing bushing 31 and the end face 45 of the inner sleeve 15 of the lower radial bearing 11 slip when the direction of screwing of the thread 41 of the shaft 7, the spindle section 6 and grabs the sleeve 31 and the bottom of the fishing device 30 coincides with the direction of rotation of the drill string (not shown in figure 1) when lifting from wells shown on 1, 2.

The retaining ring 33 is made with an outer collar 46 in contact with an end face 42 of the outer collar 46 with an end face 45 of the inner sleeve 15 of the lower radial bearing 11 of the slip, the maximum diameter 47 of the outer collar 46 of the thrust ring 33 is equal to the outer diameter 48 of the inner sleeve 15 of the lower radial bearing 11 of the slide, shown in figure 2.

Diameter 49, D HV the domestic fishing zone, fixed in the housing 5, the spindle section 6 of the lower threaded sub 14, and the outer diameter 50, D1fishing clamp 32 fishing bushing bottom 31 of the fishing device 30 connected by the relation: D=D1-(0,030,05)D, shown in figure 2.

In addition, POS - slider skew angle screw screw hydraulic motor, containing a hollow curve of the shaft 52 with outer splines and threads at its edges, coupling 53 with the inner longitudinal spline grooves and the inner rectangular teeth on the end that is installed on the external longitudinal slots of the hollow curve of the shaft 52, a direct sub 54 and curve sub 55, nesosna located between a (angle of misalignment up to 3), shown in figure 1.

Downhole hydraulic engine works as follows: the flow of drilling mud 4 under pressure through the string of drill pipes served by the pump rig in multiple screw (lock) camera between your teeth multiple screw rotor 3 and the helical teeth of the plates 2 of the elastomer (a cross section of the teeth and plates not shown), and the stream of drilling mud 4 forms a region of high pressure and torque from hydraulic forces, which results in the planetary-rotor rotation, the rotor 3 within the elastomeric sheath 2, fixed in the housing 1.

Screw mnogozahodnoy the camera between the helical teeth of the rotor 3 and the helical teeth of elastomer plates 2 have a variable volume and is periodically moved by the flow of drilling mud 4, which has a density of 1500 kg/m3contains up to 1% sand and 10% petroleum products.

Planetary-rotor rotation of the screw rotor 3 within the casing 2, fixed in the housing 1, transmits torque (in opposite direction) through the drive shaft 17, the shaft 7 of the spindle section 6 to 24 bit, by drilling the while to prevent sticking at the same time carry out the rotation of the drill string in the borehole of the rotor of the drilling machine, for example, AU right, the rotational speed of the drill string 1020 rpm

In maximum mode, the rotational speed of the shaft 7, the spindle section 6 and the bit 24 is 110310 rpm, the torque on the shaft 7, the spindle section 6 is 65 kgfm, the differential pressure (interturn, teeth elastomeric lining 2) the maximum capacity is 64 kgf/cm2maximum permissible axial load on the bit 24 is 5000 kgs.

In the fields of Western and Eastern Siberia using gyratory screw hydraulic motors DRU-RS, DRU-RS, DRU-RS, DRU-RS, DRU-RS and drilling machine EU were drilled dozens of challenging wells to a depth of 35004500 meters and then cut a window in a casing by means of a mill-reamer and drilled lateral trunks length of 350450 meters through a window in a casing for the production of oil.

The value of the stress ratio in bending (Stress ratio, the ratio of variable amplitude voltage to secondary voltage) at passage sites curvature in the rotary drilling of a lateral wellbore of an oil well screw gyratory hydraulic motor in which the shaft 7 of the spindle section 6 and grabs the sleeve 31 with the fishing clamp 32 bottom fishing device 30 rigidly connected to each other through a common thread 41 with the possibility of providing tension on the ends 42, 43 of the thrust ring 33 located between the end face 44 of the fishing bushing 31 and the end face 45 of the inner sleeve 15 of the lower radial bearing 11 of the slide, and the direction of screwing of the thread 41 the shaft 7 of the spindle section 6 and grabs the sleeve 31 and the bottom of the fishing device 30 coincides with the direction of rotation of the drill string when lifting from the well decreases and is essentially (2,23,5), thus increasing the rigidity of the lower radial bearing, as close as possible to the bit, easier to assemble and repair the spindle section when generating a resource bearings.

Run the spindle section 6 placed inside the shaft 7, mounted on an axial bearing 8, made in the form of radial multi-row ball bearing 9, and the upper 10 and lower 11 radial slide bearing so that the KJV is a great ring 33 is made with an outer collar 46, in contact with an end face 42 of the outer collar 46 with an end face 45 of the inner sleeve 15 of the lower radial bearing 11 of the slip, the maximum diameter 47 of the outer collar 46 of the thrust ring 33 is equal to the outer diameter 48 of the inner sleeve 15 of the lower radial bearing 11 of the slide, and a diameter of 49, D domestic fishing zone, fixed in the housing 5, the spindle section 6 of the lower threaded sub 14, and the outer diameter 50, D1fishing clamp 32 fishing bushing bottom 31 of the fishing device 30 connected by the relation: D=D1-(0,030,05)D, the outer sleeve lower radial sliding bearing and the lower threaded sub 14 is made as a single structure with the plates 39 of the solid alloy, bonded by impregnation of a solid alloy components ligament-solder in the lower threaded sub 14, and the hardness of the plates 39 carbide, such as tungsten carbide-cobalt, is (8992) HRA provides fewer accidents when using hydraulic downhole motor when lifting with the rotation of the drill string with a bit of lateral wellbore in the destruction of the spindle shaft, increases the life and reliability of the engine, precision sinking of wells and the rate of curvature parameters as well as ensuring a higher permeability, i.e. reduces the resistance and voltage in Kononov the e bottom of the drill string.

1. Downhole hydraulic engine, which in operation can be used in a drill string for rotary drilling, containing a hollow body placed inside gyratory screw mechanism comprising coaxially located in the housing, the stator and mounted inside the stator, the rotor, the rotation of which is pumping flow of fluid, spindle section, which includes a shaft mounted on the axial support made in the form of radial multi-row bearing, and the upper and lower radial slide bearing comprising inner and outer sleeves, accommodated in the housing, the spindle sections, respectively, on a shaft section, the shaft the spindle sections are fastened on the input drive shaft with the rotor, and the output is connected with the bit, the engine is equipped with top of the fishing device consisting of a shaft, the stop and nuts, and lower the fishing device made in the form of extractor sleeve with outer fishing collar, thrust ring and the lower threaded adapters with internal fishing clamp, top fishing device is bonded with the upper part of the rotor screw screw mechanism, and the bottom fishing device is mounted on a shaft section between the inner sleeve of the lower radial bearing and axial bearing, made in the form of the porn-multi-row radial bearing, characterized in that the spindle shaft section and sleeve fishing bottom fishing device with external fishing collar rigidly connected to each other through a common thread with the possibility of providing tension on the ends of the thrust ring located between the ends of the extractor sleeve and inner sleeve of the lower radial sliding bearing when the direction of screwing of the threaded spindle shaft section and sleeve fishing bottom fishing device coincides with the direction of rotation of the drill string when climbing out of the well.

2. Downhole hydraulic motor according to claim 1, characterized in that the diameter D of the internal fishing zone in the lower threaded sub and the outer diameter D1fishing clamp sleeve fishing bottom fishing device connected by the relation: D=D1-(0,030,05)D.

3. Downhole hydraulic motor according to claim 1, characterized in that the retaining ring lower radial sliding bearing is made with an outer collar in contact with the inner sleeve of the lower radial sliding bearing, the diameter of the outer collar thrust ring does not exceed the outer diameter of the inner sleeve of the lower radial sliding bearing.

4. Downhole hydraulic motor according to claim 1, characterized in that the outer sleeve of the lower radial sliding bearing and the lower mesibov the th sub made in the form of a uniform design with hard-alloy plates, when this plate is made of hard alloy is installed in the inner bore of the lower threaded sub and bonded together by impregnation of a solid alloy components ligament-solder.

5. Downhole hydraulic motor according to claim 4, characterized in that the molten powder ligament-solder for mounting hard-alloy plates in the lower threaded sub contains components in the following ratio, wt.%: Ni 3247, Fe-2, Cr 714, Si 2, WC rest.



 

Same patents:

FIELD: oil-and-gas industry.

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EFFECT: higher efficiency of drilling.

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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: machine building.

SUBSTANCE: screw hydraulic machine includes rotor and stator of screw shape without any elastomeric coating, which are installed with a gap. Stator is solid metal alloy ceramic or composite material. Rotor is directed on its ends with guide system to exclude direct contact to stator. In addition, rotor surface or stator surface have grooves.

EFFECT: improvement of screw machine design is provided.

16 cl, 7 dwg

FIELD: mining.

SUBSTANCE: invention relates to trilling equipment, particularly, to hydraulic motors at drill string bottom that define design motor angularity angle in inclined and horizontal oil wells. Regulator toothed coupling with internal lengthwise spline slots and teeth on face side directed toward curved tube adapter features inclined face on teeth side. Point in intersection between toothed coupling teeth central lengthwise axis with central lengthwise axis of its internal spline slots is located in coupling face on teeth side. Point of intersection between hollow curved shaft thread lengthwise axis and central lengthwise axis of said hollow tube adapter is located in face plane of toothed coupling on teeth side. Curved tube adapter has bearing segment site in cross-section of which located is the plane with point of intersection between central lengthwise axis of curved tube adapter connecting it with thread of hollow curved shaft and lengthwise central axis of curved hollow adapter thread for joint with spindle section body thread.

EFFECT: higher transmitted torque, longer life, higher reliability.

5 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: test bench for hydraulic bottomhole motors (HBM) includes base 1, clamping devices 3 to fix HBM, pump 2, receiving service tank, braking disc device 4 with hydraulic clamp and hydraulic drive, braking moment sensor, control device, frame, brake calipers with hydraulic cylinders, brake disc, power shaft with fixed brake disc and rigidly attached to HBM outlet shaft. Braking disc device 4 includes support, at least two brake discs combined into a unit located inside the support on power shaft; the same number of pairs of calipers with hydraulic cylinders, which are rigidly connected to each other in each pair and enclosing each disc in the unit. Frame is movable and kinematically connected to brake calipers. Braking moment sensor is installed on the support opposite movable frame. Base 1 is made in the form of receiving service tank.

EFFECT: creation of general-purpose test bench with wide range of standard sizes of HBM without readjustment of the bench; increase in maximum braking torque moment, improvement of measurement accuracy and efficiency.

3 cl, 3 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has metallic hubs of stator and rotor, wherein crowns of stator and rotor are concentrically pressed. Crowns of stator and rotor are made of durable ceramics and are additionally equipped with connections, allowing to exclude non-controlled turning of crowns in hubs and spontaneous axial displacement thereof.

EFFECT: higher reliability and efficiency.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes physical-chemical treatment of metallic body parts, made in form of two half-cylinders, placement of puncheon within them, preparation of fresh rubber mixture, heating press-form up to 1502C, with following vulcanization of rubber mixture, detaching press-form, removing puncheon and controlling manufacture. Three compounds of rubber mixture are prepared, with following calendaring thereof on shafts and preparing fresh rubber strip of each compound, 0.5-0.6 mm thick, which prior to placement of puncheon in half-cylinders is wound in halving fashion onto the latter. Of rubber strip of compound, providing for durability, inner layer of rubber winding is made, of compound strip, providing for auto-compensation of wear - middle layer, and of strip, providing for hardness of connection between resin and half-cylinders - outer layer. Each layer of rubber winding is made of thickness, determined from relation khw, where h - thickness of each winding layer, mm; k - coefficient, determined empirically, equal to 30-0.35 for inner layer, 0.50-0.60 for middle layer, 0.10-0.15 for outer layer; hw - total thickness of rubber mixture winding, mm. glue covering is applied to each layer and rolled under pressure. After heating of press-form, the latter is placed into one of half-cylinders. Puncheon with rubber winding is deployed and connected to second half-cylinder. After vulcanization and removal of puncheon, rubber-metallic portion of stator is fixed in body pipe.

EFFECT: higher durability and simplified maintenance.

4 cl, 2 dwg, 5 ex

Face engine // 2248436

FIELD: oil and gas industry.

SUBSTANCE: device has turbine module, screw gear couple, including stator and rotor, assembly for connection of rotor of screw gear couple to turbine module and spindle, according to invention, rotor of screw gear couple has pass channel, into which a valve is mounted, including locking element and saddle, while locking element is mounted on resilient element with space to saddle surface and with possible contact with saddle surface. When engine is launched whole flow of drilling mud skirts screw gear couple through pass channel in rotor and open valve, i.e. through space between locking element and saddle surface and is directed into turbine module. In face engine loads on elements of gear couple are decreased during its launch due to redistribution of flows of working liquid between screw gear couple and turbine.

EFFECT: higher reliability, higher durability.

2 cl, 3 dwg

Gear mechanism // 2250340

FIELD: mechanical engineering.

SUBSTANCE: rotor axis of gear mechanism, performing a planetary movement, is displaced relatively to stator axis for distance of engagement eccentricity. As source auxiliary contour ellipse is used, while proportional coefficient k, determining radius of guiding circle, is taken equal to half necessary number of teeth z of wheel (k = z/2), optimal shape of its teeth is provided by rational combination of ellipse shape coefficient λ, equal to relation of lengths of its semi-axes and eccentricity coefficient of auxiliary contour, in form of relation of length of greater ellipse semi-axis to rolling circle radius, while inner and outer profiles are made in form of elliptic profiles from common ellipse contour.

EFFECT: simplified manufacture.

3 cl, 11 dwg

FIELD: oil and gas industry.

SUBSTANCE: roller tracks at edge inner and outer rings are made on same side, roller tracks at inner and outer rings are made with possible contact of balls with roller tracks of inner and outer rings at angle, greater than 45°, angle being formed by line, passing through points of contact of balls with roller tracks of inner and outer rings and line, perpendicular to longitudinal axis of bearing, profile of roller tracks on inner and outer rings is made from inequality condition D1 > (Din + Dout)/2, where D1 - diameter of circle passing through centers of balls in assembled bearing, Din - inner diameter of inner ring, Dout - outer diameter of outer ring, hardness of inner and outer rings being greater than 48 HRC, application point of radius of roller tracks profile on inner rings is placed in plane of stopping end of inner ring.

EFFECT: higher durability and reliability.

4 dwg

Boring rig // 2255194

FIELD: oil and gas well boring equipment.

SUBSTANCE: boring rig comprises turbodrill, drill bit and reducer including several planetary mechanisms and installed in-between. Sun gears of both planetary mechanisms are secured to turbodrill rotor shaft. Carrier with plane pinion axes of upper planetary mechanism is connected to boring rig body. Ring gear is attached to upper link of drill bit. Ring gear of lower planetary mechanism is linked with plane pinion axes of upper planetary mechanism, carrier thereof is connected with lower link of drill bit.

EFFECT: increased efficiency due to increase in turbodrill rotor speed up to optimal value, reduced number of turbodrill steps and hydraulic resistance thereof, increased flushing liquid flow velocity, reduced reactive moment on turbodrill stator and pipe string.

1 dwg

FIELD: oil and gas well drilling equipment, particularly hydraulic downhole motors.

SUBSTANCE: device has screw bottomhole motor comprising sub and body for arranging operating tool sections. Tool sections are mating rotor and stator surfaces made in the form of multistart screw pair. Tangential current-speed and inlet drilling mud direction transducer is installed above screw pair. The transducer comprises body, retaining ring and sealing collar. Blades of the transducer are right-handed (in opposition to helical teeth of the rotor and the stator).

EFFECT: increased mechanical penetration rate due to increased load applied to drilling bit without reduction in power and shaft torque indexes.

3 dwg

FIELD: drilling equipment, particularly for directional drilling, namely control devices adapted to control angle and reactive moment.

SUBSTANCE: control device has hollow central member and three hollow tubular noncoaxial members connected to hollow central member. Inner member is disposed in center between the first and the second members. The first and the second members are connected with inner members by threaded connection. The first member is connected to spindle by threaded coupling, the second member is attached to engine body by threaded coupling and central member is connected to inner member by spline. Each of central member and the first member are provided with sectional contact seats located from spindle connection side, wherein a pair of sectional contact seats arranged from either sides of meridional spindle plane in drilling string curvature plane are defined between central and the first members. Sectional contact seats defined between central and the first members are spaced a distance L from the nearest edges of sectional contact seats of central and the first members along central axis of the first member. The distance L is more or equal to spindle diameter D. Angular deviation of the sectional contact seat formed in the first member from meridian spindle plane in drilling string curvature plane is oppositely directed relative reactive drilling bit moment.

EFFECT: increased stability and angle of gerotor engine deflection and increased accuracy of non-uniform well bottom zone penetration.

2 cl, 10 dwg

FIELD: well drilling equipment, particularly bearings adapted to work in abrasive medium.

SUBSTANCE: radial bearing has body and shaft, as well as thrust collars secured in the body and spring-loaded holders arranged between the shaft and the body. Inserts with conical outer surfaces are located between the holders and the shaft so that inserts cooperate with the shaft and with inner surfaces of the holders. Radial bearing is made as two oppositely arranged blocks and as compression spring inserted in-between. Each block has stop member secured in the body and made as slotted bush. Inserts are arranged in the bush and may perform displacement in radial direction. Thrust collars have conical surfaces cooperating with outer surfaces of the inserts. Angles α at apexes of the cones defined by interacted conical surfaces of bearing support inserts, thrust collars and holders are correlated with friction coefficient μ of interacted surfaces as tg(α/2)≈μ. Insert surfaces cooperating with shaft surface may have coating of elastomeric or hard-alloy material. In accordance with the second embodiment surfaces of inserts, thrust collars and holders interacting one with another may have flat contact zones, which are inclined at (α/2) angle to longitudinal shaft axis.

EFFECT: increased operational reliability of radial bearing.

6 cl, 3 dwg

FIELD: oil and gas well drilling equipment with the use of hydraulic downhole motors.

SUBSTANCE: support-and-centering member is made as metal hub with blades connected to spindle connector. Spindle connector has support cone formed on outer surface thereof and adapted to provide rigid connection with metal hub from inner surface thereof. Support cone of the connector is formed from side of conical thread connecting spindle body with connector. Spindle connector has splines to connect thereof with metal hub. Metal hub is pressed with pressing cone, retaining washer and nut from another side thereof. Metal hub may be installed concentrically or eccentrically to spindle connector axis or outer surface thereof may be differently shaped and arranged eccentrically, concentrically or obliquely with respect to spindle connector axis.

EFFECT: reduced costs of spindle usage.

5 dwg

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