# Method of control over hydraulic face motor under face conditions

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

The method of controlling the mode of operation of hydraulic downhole motor in downhole conditions

The invention relates to the drilling of oil and gas wells hydraulic downhole motors, and in particular to methods of operating mode control of hydraulic downhole motor in downhole conditions.

A known method of controlling the mode of operation of the downhole motor in downhole conditions on the testimony downhole hydrocooler (see source - book of Wadesboro JV Drilling oil and gas wells. - M.: Nedra, 1973, p.59). In this way the control over the generated axial load is on the ground the weight indicator and the frequency of rotation of the bit is an output shaft of the engine is controlled by hydrocooler. The reading of the pressure gauge on the riser in this way fixes the engine stop and the accompanying sharp increase in pressure drop.

A known method of controlling the operation mode of rock cutting tool during drilling screw downhole motors (SU # 1376649, E21B 4/02, publ. 30.09.1990), including the pressure in the discharge line during engine operation at constant load, it is permissible wear of the tool is determined from the ratio of pressures measured at different operating conditions of the engine, and replace the tool when the values of this ratio not exceeding in azannyh limits:

$P-Px.x'P0-Px.x=1,3÷1,7$

The known method provides for the registration of the pressure corresponding to the operation mode of the engine on the bottom with no load after washing the borehole bottom, and the stabilization of the pressure drop in the discharge line and under load, and the pressure in the discharge line is produced at a constant weight on the bit, measured by ground-based weight indicator. It is permissible wear of rock cutting tool is determined from the ratio of pressures measured at the beginning of drilling and its current value.

For all the above methods, the drilling control characteristic low quality the axial load on the rock-breaking tool for drilling horizontal and directional wells, the downhole motor.

When drilling downhole motor are often problems associated with the instability of his work - interleaved modes from optimal to brake and stop the engine, due to the heterogeneity (hardness) to be drilled rocks. P is acesse PDM work in horizontal and directional wells causes frequent stops of the engine is the lack of precise control of the brake torque, directly related to the uncontrollability of the generated axial load. The impossibility of determining the load is directly connected with the work of the friction of the drill string in the borehole. In the process of deepening the horizontal part she perceives as compressional, shear, and bending loads. Friction (landing) of the drilling tool due to both the heterogeneity of the drilled rocks (physico-mechanical properties), corners well curvature and angle of twist of the drill string due to the perception of the reactive torque of the engine, affecting its spatial position in the borehole. The increased friction associated with the change in the flow rate Q and the hydraulic force W at variable engine operating conditions that affect the lower quality of treatment and, as a consequence, leads to salamouny the annulus of the well.

In most drilling companies in drilling horizontal sections of the wells included in the layout of the bottom hole Assembly (BHA) of the downhole motor determining the axial load on the bit is as follows: carry out the descent BHA 5-10 m before reaching the slaughter; determining the weight on the hook; includes pump and run PDM without load; record the pressure on the manifold (riser drilling rig) when the engine is running, nicholaston course; lower BHA to the bottom and again record the pressure on the manifold with a smooth creating a load on the bit. With the growing pressure on the manifold is determined by the axial load on bit and torque on a shaft of the engine when operating optimally (according to passport characteristics SDM), and the brake mode. Then on the metro GTI (geological-technical research), which provides information about the magnitude of the axial load is determined only by the weight of the column (loss - weighting) in the process of descent and drilling, producing the actual adjustment of the axial load on the bit.

Method of operating mode control screw engine in downhole conditions (SU # 1128646, IPC E21B 4/02, publ. 30.09.1990) adopted for the prototype. The method consists in the implementation of measurement readings of the pressure in the discharge line when the engine is under load and without load, and maintain the desired shaft speed of the engine is carried out by maintaining a constant difference between the measured pressure. The accuracy of the control mode of the engine, this method is satisfactory when drilling a strong and homogeneous medium breeds.

The disadvantages of the method include the fact that, as experience has shown, it is not possible with sufficient accuracy to control and manage the operation modes of the engine when drilling Laborem nirvanah soft rock, since under these conditions the cutters of the drill bit penetrate to a great depth, and the liquid is not completely washes out the cut rock, which reduces the quality of the barrel and the rate of penetration, this mode helps clinicoanatomical.

Theory of rock failure was based on the axial load on the bit, as the easiest and most affordable option, which was continuously monitored via hydraulic weight indicator. The research was conducted in two directions: the dependence of the mechanical drilling speed on the magnitude of the axial load on the bit and the dependence of the rate of drilling speed bits:

$Vm=f(G)andVm=f(n);(1)$

where: V mechanical ROP;

f - function; G is the axial load; n - rotational speed of the bit.

In accordance with the laws of physics, the velocity of any process depends on the magnitude of energy consumed, as well as the drilling process is no exception, and the rate of drilling depends on the amount of energy consumed, ie,

$Vm=f(W/mi> d);(2)$

where: W - the energy spent on the bit, it consists of hydraulic W and mechanical W.

$Wd=Wg+Wm;Wg=ΔPd*Q;Wm=6,28M*n;(3)$

where: Δ - pressure drop in the bit, Q is the flow rate of drilling fluid, M is the torque on the bit, n is the frequency of rotation of the bit.

Hydraulic energy at the bit constant as the flow rate and the difference in the bit constant, therefore, to simplify the task at this stage is not considered.

Mechanical energy is dependent on the torque on the drill and the frequency of rotation of the bit. During turbine drilling to define neither one nor the other values without additional complicated and expensive devices is not possible, so the choice was made to control one component torque and speed - axial load on the bit.

$M=f(Gmo> );n=f(G);(4)$

For turbine drilling this approach is fair and efficient.

With regard to the use of downhole motors, then there exists a simpler, more accurate and reliable method of determining and controlling spent on the bit of mechanical energy at a known poster the characteristics of PDM and the known flow rate of drilling fluid.

As already mentioned, the mechanical speed of penetration depends only on the quantity spent a bit of energy. If the bit receives mechanical energy, the rate of penetration will correspond to the magnitude of this energy and geological conditions, and it does not matter what the true axial load is present on the bit. The energy spent on the destruction of the breed consists of works of only 2 units (5), namely, torque and speed, as you can see, there is no axial load. Torque on the bit depends on several unknown parameters: mechanical rock properties, axial load, status bits, and others - all this is unknown, but known to itself the amount of torque and its constituent parts in Yes who " lose their meaning.

$Wm=6,28M*n,KInt;gde:(5)$

W - output mechanical power of PDM, is mechanical energy transmitted to the bit spent on the destruction of the breed, kW;

M - torque on the bit, CNM;

n is the frequency of rotation of the bit, C-1.

Torque on the bit, as it is known, can easily be determined by the magnitude of the differential pressure during drilling and marking characteristics of PDM. The frequency of rotation of the bit is also easily determined by the flow of drilling fluid and nameplate capacity PDM.

Thus, it is enough to control the size of the mechanical energy expended by the chisel on the destruction of the breed to ensure the necessary mechanical ROP. However, as practice has shown, there are geological conditions (loose rocks), in which the nominal amount spent on the bit of mechanical energy is excessive, and then deteriorates the quality of the barrel walls and deteriorating removal of drilling cuttings.

The present invention is to improve the efficiency of drilling wells by the Opera of the positive changes the mode of operation of hydraulic downhole motor with the introduction of the cutters of the bit in rocks of different plasticity (solid, soft, sebastiendrums etc.) by improving the quality control of the feed speed of the bit.

The technical result is achieved due to the fact that the method of controlling the mode of operation of hydraulic downhole motor in downhole conditions, including measurements of the pressure in the discharge line under load and no load on the bit, maintain a constant difference between the measured pressure readings, according to the invention, determine the maximum value of the feed speed of the drill bit (V p) by the formula:

$Vp.daboutp=a×h×n,m/handwith a,gde:(6)$

V. - the maximum permissible feed speed of the bit, m/h;

a - experimental value-dependent plasticity of rocks (from 0.5 to 0.95),-1;

h - the height of the working part of the cutters of the bit, m;

n is the frequency of rotation of the bit, R/h; carry out measurements of the feed speed of the bit and in case of exceeding the above maximum value is reduced to V..

Figure 1 shows the performance of wells drilled on the same Bush.

The first well No. 1 was drilled in limestone is Tomo method, and up to 10 hours PDM just passed 161 m of penetration, the average mechanical speed reached 121, 1million m/hour.

The second well No. 2 was drilled by the invention method, and for 10 hours passed 426 m of penetration with average mechanical speed 79 m/hour. Both wells are drilled the same type of PDM and similar bits.

Figure 2 shows the depth of penetration of the cutter bits on the rocks.

On Figa shows the depth of destruction h1 hard rock cutter bit with the height of the working part is equal to h corresponding to the feed speed of the tool V1 when the frequency of rotation of the bit n.

On Figb shows the depth of penetration of the bit into the soft rock, in nominal mode of drilling, the feed speed of the tool V2 when the frequency of rotation of the bit n, the depth of penetration of the bit into the soft rock corresponds to h2.

On FIGU presents the scheme of drilling soft rock with an estimated maximum ROP V3. The slice thickness of the breed for one revolution of the bit (the depth of penetration of the cutter bit) is h×a, where h is the height of the working part of the cutters of the bit, m; a - experimental value-dependent plasticity of the breed. The drilling mode in this period is less than the nominal.

The method is as follows. Determine the maximum value of the feed speed of the drill bit (V..) by the formula (6). After the descent of the drill to the Onna into the borehole and including mud pumps, bring the rock-breaking tool (chisel) to the bottom and slowly increase the load on the bit, by feeding the drill string. While watching the growth of pressure in the discharge line, and when the pressure of the working values of the feed rate will stabilize at this level. With further drilling, in case of pressure drop to maintain the desired mode of operation SDM feed rate of the bit increases, but as soon as it has reached its maximum value calculated by the formula (6), further feeding the carry bit on the estimated speed and the engine operation mode is changed, and in this period, the mode does not match the nominal. This mode continues until the end of the soft layer. When implementing incisors bit more hard rock moment on the bit and the load will increase rapidly (due to high feed speed of the tool), as evidenced by the increase in working pressure, at this time reduce or completely stop the flow of bits, and resume only after the fall of the pressure to the recommended nominal value. Further, the feed speed of the bit fitting for the rate at which mechanical energy at the bit to be permanent and to meet the recommended amount of weight on the hook can be changed at any range, but not below mi the distribution panel is minimal valid, specified in the documentation. The proposed method can be used to control drilling for screw downhole motors and turbodrills.

Experience drilling wells in Western Siberia has shown that the construction of wells in identical conditions using the same equipment is very different. It was assumed that this is due to excessive wear of the working bodies of the engine, but after removing energy performance exhaust engines was that the technical condition of all good engines.

Subsequent studies have shown that at the time of well construction adversely affected by high feed speed of the tool at a nominal flow on the bit of mechanical energy. As in the case of the contact of the bit with the softer the rock, the presence of nominal mechanical energy in the bit will lead to a very deep incision not only cutters and blades of the bit. I.e. there will be puncturing of the breed, the breed is not cut, crushed and stuck on the bit and other elements of the BHA. The wall of the wellbore for this reason have an uneven appearance, and the barrel is complicated, so we have to build-up a long time to work out. There are cases when the time of the study, and wash well in front of the building exceeded the time of mechanical Boo is placed in three - four times. And therefore increased the time of well construction. Making data adjustments in the operating mode control PDM by limiting the feed rate of the tool to the calculated value, are excluded for further accelerates the process of well construction.

Thus, the proposed method by taking into account the influence of the properties of the formations drilled and timely changes in drilling mode, reducing the feed speed of the tool to the maximum permitted value, significantly increases the drilling efficiency.

The specific implementation of the method of controlling the mode of operation of hydraulic downhole motor consider the example of drilling wells No. 1 and No. 2 Eat-Yoga field Tyumen region Drilling was carried out downhole motor DR-178. 6/7 .62 with depth 738-747 m the First drilled well # 1 using well-known ways of controlling engine operation mode of the prototype. For the first day passed 161 m up to 10 hours of PDM, the average mechanical speed was 121, 1million m/hour, i.e. from 10 hours PDM only 1,33 h was clean drilling.

In the process of drilling soft rock mechanical speed up to 250 m/h. Technological ROP, including the time of leaching and elaborations in front of the building amounted to \$ 16.1 m/hour. During the drilling of well No. 2 on this W the Bush according to the formula of the present invention is defined allowable value of the feed speed of the tool, which was 100 m/h during drilling without rotation of the tool and 130 m/h with rotation of the tool rotor 60 rpm Drilling of well No. 2 was carried out in the same modes as well # 1 except drilling speed plots soft rocks, where the feed speed of the tool was limited to the calculated values. As a result, over 10 hours PDM passed 426 m for 5.39 hours of drilling, the average mechanical speed was 79 m/h, which is 35% lower than in the first well. Despite the fact that the average mechanical speed for drilling the second well has decreased over the same time PDM drilled 2.64 times more meters, and speed rose to 42,6 m/h

Proposed method of control the mode of operation of hydraulic downhole motor in downhole conditions allowed with sufficiently high accuracy to control and manage the operation mode of the engine when the input and output bits in soft rocks that have improved the cleaning of the shaft and bit. In the stopped clinicabarcelona, improved patency of BHA in the wellbore. Technological rate of penetration increased by 2.64 times. Time PDM during the drilling of all wells decreased, and accordingly decreased engine wear. redlagaemyi method has improved the accuracy of the operating mode control of hydraulic downhole motor in downhole conditions, especially when drilling soft, weakly cemented rocks, quickly change the mode of operation of the engine when changing downhole conditions, to reduce the time of operation of the engine and the wear rate, to improve the cleaning of the bottom hole drilling, improve the technology of drilling performance and durability of the working bodies of the engine, reduce cost, save time drilling wells.

The method of controlling the mode of operation of hydraulic downhole motor in downhole conditions, including measurements of the pressure in the discharge line under load and no load on the bit, maintaining a constant difference of the measured readings of pressure, characterized in that to determine the maximum value of the feed speed (V.) bits according to the formula:
V.=a·h·n, m/h,
where V. - the maximum permissible feed speed of the bit, m/h;
a - experimental value-dependent plasticity of rocks (0,5-0,95)-1;
h - the height of the working part of the cutters of the bit, m;
n is the frequency of rotation of the bit, R/h;
carry out measurements of the feed speed of the bit and in case of exceeding the above maximum value is reduced to V..

Same patents:

FIELD: oil and gas industry.

EFFECT: development of method for bit load regulation during lateral drilling against actual load characteristic of hydroturbine motor plotted against simultaneous data received in drilling process about rotational velocity and bit load.

6 dwg

FIELD: mining.

SUBSTANCE: adaptive control method of well drilling conditions is based on control of well sinking speed by changing an axial load on a drilling tool, frequency of its rotation and flow rate of flushing fluid separately or in their combination; with that, the above parameters shall be strictly in compliance with geological working face conditions determined with hardness of mine rock as per the specified algorithm. A well drilling bit includes a housing, a shaft with a pilot bit and a central flushing channel, which is attached to the housing; a flushing assembly in the form of radial channels and head pieces. With that, in upper part of the shaft and opposite teeth of rolling cutter located in upper position relative to the teeth contacting the working face, there installed are additional head pieces for flushing of inter-teeth gaps blocked with slurry.

EFFECT: creation of adaptive drilling conditions by strict compliance of working face mine rock destruction conditions, conditions of working face cleaning from destructed rock and geological conditions determined with mine rock hardness.

FIELD: oil and gas industry.

SUBSTANCE: method includes stress inducing in formation around well shaft in order to generate in it some special feature related to induced stress. Measurements presenting well shaft geometry are performed using assembly of drilling string bottom rotated in well shaft, which geometry presents induced stresses in formation. Creation of well shaft image based on its geometry measurements. Evaluation of azimuth variation of induced voltage in formation by well depth. Change of parameter of drilling mode for assembly of drilling string bottom using evaluation of azimuth variation of induced voltage in formation by well depth.

EFFECT: using data obtained in real-time mode, checking stress model for certain region, so that the path may be corrected constantly for achievement of optimum ratio with measured characteristics of stress for this region.

21 cl, 12 dwg

FIELD: oil and gas industry.

SUBSTANCE: model is adapted to downhole conditions by means of its coefficients changing, calculation of optimal parameters and drilling of a well in optimal modes which is determined by minimum vibration frequency of drill pipe. The method envisages multiple coefficients updating for power law model by results of well measurements, calculation of optimal parameters of control against the criterion of maximum mechanical speed, performance of drilling at calculated parameters with optimum control against minimum vibration of the drill pipe. Besides drilling model the method uses flushing model for the purpose of even drilling and cleaning of wellbore from drill cuttings and also strata model characterising ability of formations for drilling.

EFFECT: increasing accuracy for control of drilling mode and increasing mechanical speed of hole making due to optimisation of control over minimum vibration of the drill pipe.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes acquisition of log data on depth and time for a well drilling by means of a well string; log data on depth and time including data related to factors of torsional and axial loads and data related to hydraulic factor; and determination of a drill string neutral point at the moment of drilling based on factors of torsional and axial loads and hydraulic factor.

EFFECT: determination of a drill string neutral point during well drilling.

20 cl, 4 dwg

FIELD: mining.

SUBSTANCE: method to calculate instantaneous speed of drilling string assembly bottom rotation at a lower end of the drilling string, with a drive from a drilling mechanism on the upper end of the drilling string exposed to oscillations of sticking-slipping, having the rated or observed main frequency, besides, the method contains stages of detecting changes in a torque on a shaft of the drilling mechanism, combining the available torsion pliability of the drilling string with changes of the torque at the shaft and generation of an output signal, which represents instantaneous speed of rotation.

EFFECT: tuning of proportional-integral or proportional-integral-differential controller for damping of twisting waves energy at sticking-slipping frequency or near it.

15 cl, 15 dwg

FIELD: mining.

SUBSTANCE: method contains the following stages: (a) damping of sticking-slipping oscillations using a drilling mechanism above a drilling string, (b) control of drilling mechanism speed of rotation using a PI controller, (c) turning of a PI controller so that the drilling mechanism absorbs a larger part of twisting energy from the drilling string at the frequency of sticking-slipping oscillations or near it.

EFFECT: tuning of proportional-integral or proportional-integral-differential controller for damping of twisting waves energy at sticking-slipping frequency or near it.

21 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: construction machine includes load-carrying plant, actuating device installed with possibility of adjusting the position relative to the load-carrying plant, at least one sensor to sense the position of supporting strut of mast, and at least one sensor to sense pulling force in auxiliary rope, and computing device provided with possibility of determining (based on the data of the above sensors) at least one adjustment range of actuating device, in which the actuating device can be adjusted at pre-specified stability of construction machine against turning over.

EFFECT: determination of overturning moment of construction machine and provision of stability of construction machine.

10 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves the following stages: obtaining the entry including the specified drilling trajectory to target location; determination of predicted location of equipment of drilling string bottom of drilling system at continuous drilling; comparison of predicted location of equipment of drilling string bottom with the specified drilling trajectory for determination of deviation value; creation of the changed drilling trajectory to target location, which is chosen based on deviation value from the specified drilling trajectory; automatic and electronic creation of one or several control signals of drilling device on the well surface to direct the equipment of drilling string bottom of drilling system to target location as per the changed drilling trajectory.

EFFECT: improved control of equipment of drilling string bottom, which leads to improved response of equipment of drilling string bottom and quicker operation of equipment of drilling string bottom.

21 cl, 11 dwg

FIELD: oil and gas production.

SUBSTANCE: proposed method comprises adjusting and maintaining optimum differential pressure by defining and adjusting flushing fluid density, allowing fro mechanical rate of boring depending on formation drillability index. In compliance with proposed method, drilling parameters are controlled directly at well bottom. Here, adjusted are differential pressure above screw device bit and flushing fluid density by mounting separator there above. Note here that all components feature equal diameter while drilling rate is optimised by calculation of drilling parameters. The latter include bit rpm, load on bit, flushing fluid flow rate to be defined from mathematical expressions. Besides, drilling string bottom comprises bit, sludge trap and drilling tubes. In compliance with this invention, screw device and separator are mounted above the bit. Note here that diameter of external generator of screw, separator and other components should be equal.

EFFECT: higher efficiency of rock breaking.

2 cl, 1 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: 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 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

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