Control device adapted to control angle and reactive moment of gerotor engine with spindle and drilling bit inside bended drilling string

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

 

The invention relates to a device for drilling directional oil and gas wells, namely the angle regulators and reactive torque gerotor motor with a spindle and a bit curved string of drill pipes.

Known gerotor motor, containing a hollow body placed inside multiple gyratory mechanism comprising coaxially located stator and mounted inside the stator, the rotor and the spindle is directly connected to the drive shaft with the rotor and placed inside the spindle, and the motor housing and the spindle are connected by a bent sub with threads at its edges [1].

In the famous statement of the motor housing and the spindle is connected with a bent sub with threaded housings, rotor and spindle are connected to the driving shaft through the threaded adapter into the internal cavity of one of the screw housing are made annular collar with ring, and the inner diameter of the ring is made with a gap relative to the drive shaft and does not exceed the outer diameter of the adapter, with the bent sub is made with skew axes threads at its edges, and the greatest distance between the axes of the crossed threads is equal to the eccentricity of the rotor relative to the stator.

A disadvantage of the known construction is t is, what to set the other values of the angle and the lateral force compensation from the bit reactive torque on the transmission, the engine and the curved spindle of the drill pipe requires disconnecting the motor from the spindle to replace the sub.

Another disadvantage of the known construction is incomplete use of the possibilities of compensating lateral force on the bit (at a certain angle on the sub), and its narrow range is the greatest distance between the axes of the crossed threads does not exceed the value of the eccentricity of the rotor relative to the stator. It is not possible to compensate for positive and negative emissions fluctuations of the axial load on the bit and to maintain an optimal axial load on the bit by saving the current values of the axial loads without buckling controlled directional curved the drill pipe string.

A known angle regulator, consisting of a Central hollow element and United with him three non-axial hollow between the tubular elements, each of which has an inner through hole, while the inner hollow tubular element is located in the center between the first and second elements and the first and second tubular elements are connected with the inner hollow tubular element threads on them facing each other, the edges of the ri, the first and the second tubular element is connected by a threaded housing gerotor motor. [2]. In the known construction of the first or second tubular element designed to connect the housing gerotor motor with a spindle or drill pipe, and the Central and inner hollow tubular elements connected by a splined connection and require a reinstall of the new angle when lifting the drill pipe string without end with a downhole motor.

A disadvantage of the known designs is the lack of compensation of lateral forces from the bit reactive torque on the angle regulator, motor and curved spindle of the drill pipe in the drilling process heterogeneity for wells.

Consequently, it is difficult to optimize the drilling of wells because of the difficulty of accounting component of the lateral force on the bit, causing reactive bending moment, changing its direction (sign) when the buckling is directed obliquely angled the drill pipe string [3]. This reduces the precision drilling of directional wells due to the unpredictable component of the lateral force on the bit, it is not possible to optimize the process parameters of drilling, in particular, to maintain the optimum axial load on the bit by saving the current values of the axial loads without buckling, curved the drill pipe string.

Closest to the claimed design, the work is the angle Adjuster and reactive torque gerotor motor, consisting of a Central hollow element and United with him three hollow tubular elements, each of which has a through hole, the first hollow tubular element has a single axis, the second another, and the inner hollow element is located in the center between the first and second elements and has a third axis, the first and second tubular elements are connected with the inner hollow element threads on facing each other, the edges of the first hollow tubular element is connected by a threaded spindle, a second hollow tubular element is connected by a thread with a motor housing, a Central hollow element is connected with the inner hollow element slots, internal the hollow element is made from intersecting with the Central axis and between the axes of the threads on its edges, and the greatest distance between the axes of skew between the threads is equal to twice the amount of eccentricity of the rotor relative to the stator gyratory motor, with the greatest distance between the Central axis and the axes of any of the threads on the sides is equal to the eccentricity of the rotor relative to the stator gyratory motor [4].

A disadvantage of known construction is incomplete use of the possibilities to increase the deflection angle and "cross" gyratory motor spindle and bit into a curved string of drill pipe through the comp is ncacii resultant radial unbalanced forces produced by the rotation of the drill bit in the wellbore.

In known constructions do not own contact segment sites on the controller, which increases the stability of a curved, the drill pipe string, for example, on different sides relative to the plane of curvature of the column, and provided continuous contact with the wall of the wellbore during drilling, and also increased the accuracy of the sinking of heterogeneity for wells due to optimum axial load on the bit without buckling, curved the drill pipe string.

The technical problem on which the invention is directed, is to increase the stability of the gyratory motor, controller and spindle in the plane of curvature of the drill pipe string, the increase of the deflection angle and "cross" gyratory motor spindle and bit into a curved string of drill pipe due to the compensation of the resulting unbalanced radial forces produced by the rotation of the drill bit in the wellbore, and holding their own contact segment sites on the controller, on different sides relative to the plane of curvature of the drill pipe, in contact with the wall of the wellbore during drilling, as well as increase the accuracy of the sinking unevenly the tee for wells for by providing optimum axial load on the bit without buckling, curved the drill pipe string.

The essence of the technical solution is that the control angle and the reactive torque gerotor motor with a spindle and a chisel in a curved string of drill pipe comprising a Central hollow element and United with him three hollow, non-axial interconnected tubular elements, each of which has an inner through hole, the inner hollow element is located in the center between the first and second elements and the first and second tubular elements are connected with the inner hollow element threads on facing each other, the edges of the first hollow tubular element is connected by a threaded spindle, a second hollow tubular element is connected by a thread with housing engine, a Central hollow element is connected with the inner hollow element slots, the inner hollow element is made from intersecting with the Central axis and between the axes of the threads on its edges, and the greatest distance between the axes of skew between the threads is equal to twice the amount of eccentricity of the rotor relative to the stator gyratory motor, with the greatest distance between the Central axis and the axes of any of the threads on the sides is equal to the eccentricity of the rotor relative to the stator gyratory motor according to the invention, the Central hollow element and the first hollow tubular element, from preprogram the Oia with the spindle, each made with their own contact segment platform and form between a pair of the contact segment of the sites located on different sides relative to the Meridian plane of the spindle in the plane of curvature of the drill pipe, and along the Central axis of the first hollow tubular element at the distance L between the near edges of the contact segment sites, which with an outer diameter D of the spindle is connected by the relation: L≥D, the angular deviation of the contact segment areas of the first hollow tubular element (in cross section) from the Meridian plane of the spindle in the plane of curvature of the drill pipe string is made in the opposite direction relative to the torque reaction from bits.

In addition, forming the contact segment sites in the Central hollow element and on the first floor of a tubular element located on the outer surface of the corresponding tubular element, and each of the contact segment of the sites contains the ranks secured in the tubular element inserts or pins, hardness exceeding the hardness of these sites.

A Central hollow element and the first hollow tubular element, the coupling of the spindle, each with their own contact segment area, the formation is between a pair of the contact segment sites, located on opposite sides relative to the Meridian plane of the spindle in the plane of curvature of the drill pipe, and along the Central axis of the first hollow tubular element at the distance L between the near edges of the contact segment sites, which with an outer diameter D of the spindle is connected by the relation L≥D, the angular deflection of the contact segment areas of the first hollow tubular element from the Meridian plane of the spindle in the plane of curvature of the drill pipe is made in the opposite direction relative to the reactive torque from the drill bit allows you to shift the center of rotation of the bit against the rotation of the bit and to compensate for the lateral force at the mouth curved columns downhole pipe, without changing Zenith angle due to the redistribution reactions lateral force on the bit, depending on the axial load without buckling, curved the drill pipe string. This allows you to optimize and improve the accuracy of the borehole due to the increased accuracy of the accounting component of the lateral force on the bit, causing reactive bending moment, changing its direction (sign) when the buckling is directed obliquely angled the drill pipe string.

The location of forming the contact segment sites on the Central floor of the m element and on the first floors of the tubular element over the outer surface of the corresponding tubular element, and each of the contact segment with rows fixed in the tubular element inserts or pins, hardness exceeding the hardness of these sites increases the stability of the gyratory motor, controller and spindle in the plane of curvature of the drill pipe, increases the resource controller in the conditions of abrasive wear on the walls of the well and provides compensation of positive and negative emission fluctuations of the axial load on the bit and the optimal axial load on the bit by saving the current values of the axial loads without buckling, curved the drill pipe string.

In General, this allows you to compensate for the resulting unbalanced radial force produced by the rotation of the drill bit in the wellbore, and to keep their own contact segment pad on the controller in different directions relative to the plane of curvature of the drill pipe in contact with the wall of the wellbore during drilling.

Figure 1 shows the gyratory motor with angle Adjuster and the reactive torque from the spindle and bit into a curved string of drill pipe.

Figure 2 shows the element I in figure 1 the output part of the gyratory motor connected to control the angle and the reagent is on point with the spindle.

Figure 3 shows the control angle and the reactive torque gerotor motor in the plane of curvature of the drill pipe string.

Figure 4 shows the section a-a in figure 3 along regulator across the plane of curvature of the drill pipe string.

Figure 5 shows a section b-B in figure 3 across the first hollow tubular element.

Figure 6 shows the appearance of the first hollow tubular element.

7 shows the first hollow tubular element in a section along the axis of the threaded region.

On Fig shows the appearance of the interior of the hollow tubular element.

Figure 9 shows an external view of the Central hollow element.

Figure 10 shows the section b-b In figure 2 across the gerotor motor.

Below are the most preferable embodiment of the control angle and the reactive torque gerotor motor.

Gyratory engine 1 with controller 2 of the angle and the reactive torque from the spindle 3 and bit 4 in the curved string of drill pipes 5 are depicted in figure 1, 2.

The controller 2 of the angle and the reactive torque gerotor motor 1 consists of a Central hollow element 6 and United with him three hollow tubular elements 7, 8, and 9, each of which has an inner through holes 10, 11 and 12, smfh. The first hollow tubular element 7 has a single axis 13, the second tubular element 8 has another axis 14, and GNC is Rennie hollow tubular element 9 is located in the center between the first tubular element 7 and the second tubular element 8 and has a third axis 15, smpeg, 4. The Central hollow tubular element 6 is connected with an inner hollow tubular element 9 slots 16, smpeg, 9.

The first hollow tubular element 7 and the second hollow tubular element 8 is connected with the inner hollow element 9 threads 17, 18 facing each other, the edges 19, 20. On the edge 21 of the first hollow tubular element 7, and the edge 22 of the Central hollow element 6 provided with slots 23, which is set to the desired angle and the reactive torque regulator, smpeg, 6, 9.

The first hollow tubular element 7 is connected by threads 24 with the housing 25 of the spindle 3 gyratory motor 1, smpeg, 3. The inner hollow element 9 is made from intersecting with the Central axis 15 and between the axes 26 and 27 of the threads 17 and 18 at its edges 28, 29, smfh.

The maximum distance between the axes 26 and 27 skew between the threads 17 and 18 is equal to 2E, i.e. twice the value of the eccentricity E of the rotor 30 relative to the stator 31 gyratory motor 1, see figure 4, 10. The maximum distance between the Central axis 15 of the inner hollow element 9 and the axes 26 and 27 of the threads 17 or 18 at its edges 28 and 29 is equal to the eccentricity E of the rotor 30 relative to the stator 31 gyratory motor 1, smpeg, 10.

The axes 26, 27 at the edges 28, 29 of the inner hollow element 9 is subjected to unbalanced load reactive moment gerotor the wow engine, located respectively at different distances E1 and E2 of the Central axis 15, smfh. Skew angle between the Central axis 15 of the inner hollow element 9 and the axis 27 of the thread 18 is marked α (smfg). Skew angle between the Central axis 15 of the inner hollow element 9 and the axis 26 of the thread 17 is marked β (smfg). The first hollow tubular element 7 can be made with curved axis 13 of its threaded portion 24 at an angle γ (see figure 3).

The Central hollow element 6 and the first hollow tubular element 7, by the coupling of the spindle 3, each made with their own contact segment platform 32, 33 and is formed between a pair of the contact segment of the sites located on different sides relative to the Meridian plane 34 of the spindle 3 in the plane of curvature of the drill pipe string, for example, in the plane of figure 1, and along the Central axis 13 of the first hollow tubular element 7 is at the distance L between the near edges 35, 36 of the contact segment areas 32, 33, which with an outer diameter D of the spindle 3 is connected by the relation L≥ D, smpeg, 4

The angular deviation of 37 contact segment pads 33 of the first hollow tubular element 7 (in cross section) from the Meridian plane of the spindle in the plane 34 of the curvature of the drill pipe 5 is made in the opposite direction Rel is relatively reactive moment M rfrom bits 4, smfh

Forming a contact 38 of segment areas 32, 33 on the Central hollow element 6 and on the first floors of the tubular element 7 is located above the outer surface 39 of the respective tubular element 6 or 7, smfh

The contact segment platform 32, 33 contain rows bonded with their walls inserts or pins marked POS, hardness exceeding the hardness of the contact segment platform 32, 33 of the respective tubular element 6 or 7, smpeg, 7, 9

The angle Adjuster and reactive torque gerotor motor with a spindle and a chisel in a curved string of drill pipe works as follows: washing fluid under pressure through the string of drill pipes 5 is fed into the helical cavity between the rotor 30 and the stator 31. Emerging on the rotor 30 torque causes its planetary motion relative to the stator 31, which by means of universal joints, drive shaft is converted into rotational movement of the rotor spindle 3 and bit 4. When drilling heterogeneous rocks on the knob 2 of the angle and torque reaction, and the spindle 3, the gyratory motor 1 and bit 4 occurs reactive bending moment Mrdue to the cutting force on the bit 4. The above reaction moment Mrcompensated by an internal hollow tubular ele is enta 9 with skew with its Central axis 15 and between the axes 26 and 27 of the threads 17, 18 at its edges 28, 29.

The planetary motion of the rotor 30 within the stator 31 is opposite to the transfer of torque from the rotor 30 on the spindle 3 and bit 4. The offset (in cross section) axis 26 and 27 relative to the axis 15 perform against the rotation of the bit 4, since in this case there is no loss of direction, i.e. the sign of the resilience of the curved columns with both positive and negative emissions fluctuation of axial load on bit 4. A Central hollow element 6 and the first hollow tubular element 7, by the coupling of the spindle 3, each with their own contact segment platform 32, 33, with formation between a pair of the contact segment of the sites located on different sides relative to the Meridian plane 34 of the spindle 3 in the plane 34 of the curvature of the drill pipe 5, and along the Central axis 15 of the first hollow tubular element 7 is at the distance L between the near edges of the contact segment areas 32, 33, which with an outer diameter D of the spindle is connected by the relation L≥D, angular deviation 37 contact segment pads 33 of the first hollow tubular element 7 from the Meridian plane of the spindle in the plane 34 of the curvature of the drill pipe 5 is performed in the opposite direction relative to the reactive moment Mrfrom bits 4, additional what about increasing the accuracy of the displacement of the center of rotation of the bit 4 against rotation of the bit, i.e. against its torque Mkr.

This allows you to optimize and compensate for lateral force at the mouth curved columns downhole pipe, preventing the change of the Zenith angle due to the redistribution reactions lateral force on the bit, depending on the axial load without buckling, curved the drill pipe string.

In practice, the vertical wellbore is drilled to the desired depth. Then drill string is extracted, partially turn the inner hollow tubular elements 7 and (or) 8 threads 17 and (or) 18, is moved in the slots 16 of the Central hollow element 6.

This spline connection 23 of the first hollow tubular element 7 is out of engagement from the Central hollow element 6 to set the desired angle and the reactive torque gerotor motor 1.

The proposed controller design increases the stability of the gyratory motor, controller and spindle in the plane of curvature of the drill pipe, increases the angle of deviation and the accuracy of the sinking of the heterogeneity of the borehole bottom gyratory motor spindle and bit into a curved string of drill pipe due to the compensation of the resulting unbalanced radial forces produced by the rotation of the drill bit in the wellbore, and holding their own contact segment on the different sites on the controller, on different sides relative to the plane of curvature of the drill pipe, in contact with the wall of the wellbore during drilling.

Sources of information:

1. RU, patent 2149971, E 21 In 4/02, 7/08, 1999.

2. US patent 5343966, E 21 In 7/08, 1994.

3. EN, "Gas industry", February 1998, page 42...44.

4. RU, patent 2186923, E 21 In 4/02, 7/08, 2000 prototype.

1. The angle Adjuster and reactive torque gerotor motor with a spindle and a chisel in a curved string of drill pipe comprising a Central hollow element and United with him three hollow, non-axial interconnected tubular elements, each of which has an inner through hole, the inner hollow element is located in the center between the first and second elements and the first and second tubular elements are connected with the inner hollow element threads on facing each other, the edges of the first hollow tubular element is connected by a threaded spindle, a second hollow tubular element is connected by a thread with a motor housing, a Central hollow element is connected with the inner hollow item slots, the inner hollow element is made from intersecting with the Central axis and between the axes of the threads on its edges, and the greatest distance between the axes of skew between the threads is equal to twice the amount of eccentricity of the rotor relative to the stator, garoto the tion of the engine, with the greatest distance between the Central axis and the axes of any of the threads on the sides is equal to the eccentricity of the rotor relative to the stator gyratory motor, characterized in that the Central hollow element and the first hollow tubular element from the coupling of the spindle are made each with its own contact segment platform and form between a pair of the contact segment of the sites located on different sides relative to the Meridian plane of the spindle in the plane of curvature of the drill pipe, and along the Central axis of the first hollow tubular element at the distance L between the near edges of the contact segment sites, which with an outer diameter D of the spindle is connected by the relation L≥D, the angular deviation of the contact segment areas of the first hollow tubular element from the Meridian plane of the spindle in the plane of curvature of the drill pipe string is made in the opposite direction relative to the reactive torque from the bit.

2. The angle Adjuster and reactive torque gerotor motor with a spindle and a chisel in a curved string of drill pipe according to claim 1, wherein forming the contact segment sites in the Central hollow element and on the first floor of a tubular element located on the outer surface of the corresponding tubular element, while each of the contact segment of the sites contains the ranks secured in the tubular element inserts or pins, hardness exceeding the hardness of these sites.



 

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