The angle adjuster and reactive torque gerotor motor

 

(57) Abstract:

The invention relates to a device for drilling directional wells, namely the angle regulators and reactive torque gerotor motor in a curved string of drill pipes. The invention consists in that the control angle and the reactive torque gerotor motor consists 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 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 to each other the edges, with the first or second tubular element is connected by a threaded housing gerotor motor, and 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 it is to be sinking heterogeneity for wells due to the expansion of the range of compensation of lateral forces from the bit reactive torque on the knob and maintain optimal axial load on the bit by saving the current values of the axial loads without buckling, curved the drill pipe string. 9 Il.

The invention relates to a device for drilling directional wells in earth formations, namely the angle regulators and reactive torque gerotor motor in a curved string of drill pipe.

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 known construction 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 skreshival 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.

Closest to the claimed design is that the 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 of the m element threads on facing to each other the edges, while 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 controlled directional curved 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 Buren is loads without buckling, curved the drill pipe string.

The technical problem on which the invention is directed, is to improve the accuracy of the sinking of heterogeneity downhole directional wells by compensating the resulting radial unbalanced force produced by the rotation of the bit in the borehole, as well as compensation of positive and negative emission fluctuations of the axial load on the bit reactive torque on the controller without buckling, curved the drill pipe string.

The essence of the technical solution is that the control angle and the reactive torque gerotor motor, consisting of a Central hollow element and United with him three hollow tubular elements, each of which has an inner 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 tubular element threads on facing to each other the edges, and the first or second tubular element is connected by a threaded housing gerotor motor according to the invention, the inner hollow tubular element wybie 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.

Implementation of the internal hollow tubular element 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 equal to twice the amount of eccentricity of the rotor relative to the stator gyratory engine that allows you to shift the center of rotation of the bit in the cross-section against rotation of the bit and to compensate for the 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.

Run the greatest distance between the Central axis of the inner hollow tubular element and the axes of any of the threads on the sides is equal to the eccentricity of the rotor relative to the stator gyratory engine allows to compensate the positive and negative emissions fluctuations of the axial load on the bit and to maintain an optimal axial Agroskin pipes.

In General, this allows you to compensate for the resulting radial unbalanced force produced by the rotation of the drill bit in the wellbore, and to keep supporting surface located on the body of the drill bit and / or regulator, in contact with the wall of the wellbore during drilling.

In Fig. 1 shows the control angle and the reactive torque gerotor motor.

In Fig.2 shows the section a-a along the slider.

In Fig.3 shows a downhole screw motor for drilling directional wells.

In Fig. 4 shows the output portion of the gyratory motor connected to control the angle and the reactive torque from the input part of the spindle.

In Fig.5 shows the appearance of the inside of the hollow tubular element.

In Fig.6 shows an external view of the Central hollow element.

In Fig.7 shows the appearance of the first hollow tubular element.

In Fig. 8 shows the first tubular element in a section along the axis of the threaded region.

In Fig.9 shows cross-section B-B across the gerotor motor.

Below are the most preferable embodiment of the control angle and reactive momis Central hollow element 1 and United with him three hollow tubular elements 2, 3 and 4, each of which has an inner through holes 5, 6 and 7. The first hollow tubular element 2 has one axis 8, the second tubular element 3 has a different axle 9 and the inner hollow tubular element 4 is located in the center between the first tubular element 2 and the second tubular element 3 and has a third axis 10 (see Fig.1). The Central hollow tubular element 1 is connected with an inner hollow tubular element 4 slots 11. The first tubular element 2 and the second tubular element 3 are connected each with an inner hollow tubular element 4 threads 12 and 13 respectively, facing each other, the edges 14, 15. On the edge 14 of the first inner tubular element 2 and on the edge of the Central hollow element 1 made slots 16, through which is set to the desired angle and the reactive torque control. The first tubular element 2 is connected by threads 17 with the body 18 of the spindle section 19, and the second tubular element 3 is connected by threads 20 with housing 21 gyratory motor 22. The inner hollow tubular element 4 is made from intersecting with the Central axis 10 and between the axes 23 and 24 of the threads 12 and 13 at its edges 25, 26 (see Fig.2). The greatest distance between the axes 23 and 24 of the skew between them is the engine 22 (see Fig.2 and 9). The greatest distance between the Central axis 10 of the inner hollow tubular element 4 and the axes 23 and 24 threads 12 or 13 at its edges 25 and 26 is equal to the eccentricity e of the rotor 27 relative to the stator 28 gyratory motor 22 (see Fig.2 and 9).

Axis 23, 24 at the edges 25, 26 of the inner hollow tubular element 4 is subjected to unbalanced load reactive torque gerotor motor, are located respectively at different distances E1 and E2 of the Central axis 10 (see Fig.2 and 9).

Skew angle between the Central axis 10 of the inner hollow tubular element 4 and the axis 24 of the thread 13 is indicated (see Fig.1). Skew angle between the Central axis 10 of the inner hollow tubular element 4 and the axis 23 of the thread 12 is indicated (see Fig.1). The hollow tubular element 2 can be made with curved axis 8 of its threaded portion 12 at an angle (see Fig.1).

The angle Adjuster and reactive torque gerotor motor works as follows: washing fluid under pressure through the string of drill pipe is fed into the helical cavity between the rotor 27 and the stator 28. Emerging on the rotor torque causes its planetary motion relative to the stator 28, which is using the card. the ri drilling heterogeneous rocks on the angle Adjuster and reactive torque and spindle gyratory motor and bit occurs reactive bending moment due to the cutting forces on the bit. The above reaction torque is compensated by an internal hollow tubular element 4 with skew with its Central axis 10 and between the axes 23 and 24 of the threads 12, 13 at its edges 25, 26.

The planetary motion of the rotor 27 inside the stator 28 is opposite to the transfer of torque from the rotor to the spindle Assembly and the bit. The offset (in cross section) axis 23 and 24 about the axis 10, it is advisable to perform against the rotation of the bit, because in this case there is no loss of direction, i.e., character, sustainability curved columns with both positive and negative emissions fluctuations of the axial load on the bit. In practice, the vertical wellbore is drilled to the desired depth. Then drill string is extracted, partially turn the inner hollow tubular elements 2 and or 3 threads 12 and (or) 13, is moved in the slots 11 of the Central hollow tubular element 1. This spline connection 16 of the first hollow tubular element 2 comes out of engagement from the Central poles.

In known constructions with the passage of solid rock is required to reduce the force on the bit. The proposed controller design does not require reduction of the axial force on the bit, since the inner hollow tubular member intersecting with the Central axis and between the axes of the threads on the edges compensates for the positive and negative emissions fluctuations of the axial load on the bit without buckling, curved the drill pipe string, while holding a support surface located on the body of the drill bit and / or regulator, in contact with the wall of the wellbore during drilling, which increases the accuracy of the sinking of the heterogeneity of the borehole bottom.

Sources of information

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

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

3. EN, "Gas industry", February 1998, S. 42-44.

The angle Adjuster and reactive torque gerotor motor, 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 element is located in the center between the first and second elements and the first and second the m first or second tubular element is connected by a threaded housing gerotor motor, characterized in that 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 gerotor motor.

 

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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

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