MXPA06001893A - Angle and reactive torque control device for a gerotor type motor provided with a spindle and drilling bit in a bended drill string - Google Patents

Abstract

The invention relates to devices for drilling controlled directional wells. The inventive control device consists of a central hollow element and three hollow out-of-line with respect to each other tubular elements connected thereto. Said central element and the first element on the side of the connection thereof to a spindel are provided for each with its own contact segmental section, thereby forming a pair of contact segmental sections arranged therebetween. Said sections are disposed on the opposite sides with respect to the meridian plane of the spindle in the bending plane of the drill string and at a distance L between the nearest edges of the contact segmental sections along the central axis of the first element at L>=D. The contact segmental section of the first element is deviated from the meridian plane of the spindel in the bending plane of the drilling string in an opposite direction with respect to the reaction torque of a drilling bit. Said invention improves stability, increases the deviation angle of a gerotor type motor provided with a spindle and drilling bit and the drilling accuracy of a bottom hole heterogeneity.

Description

AN ANGULAR REGULATOR AND MOMENT OF REACTION OF AN ENGINE OF TYPE GERROTOR, WHICH HAS A MANDREL AND ONE PERFORATION DRILL BIT INCLINED FIELD OF THE INVENTION The invention relates to devices for drilling inclined oil and gas wells; and in particular it relates to angle and momentum regulators of a gerrotor-type motor having an axis and a drill bit in an angle drill string.

BACKGROUND OF THE INVENTION Gerotor-type motors are known, which comprise a hollow housing, a multi-conductor gear-wheel mechanism, which is arranged in the housing, and includes a stator arranged coaxially, and a rotor disposed within the stator, and also a mandrel that is coupled, by means of a transmission shaft, to the rotor, and is positioned within the housing of the mandrel; the motor and mandrel housings being interconnected by an angle substitute having threads on their edges [patent RU 2,149,971, E 21B4 / 02, 7/08, 1999].

In this prior art design, the motor and mandrel housings are connected to the angle substitute, by means of threaded enclosures; the rotor and the mandrel being connected by means of the transmission shaft, using threaded adapters; the internal cavity of one of the threaded enclosures is provided with an annular rim; and said flange accommodates a ring; the inner diameter of the ring is provided with a spacing with respect to the transmission shaft, and the value of that spacing does not exceed that of the outer diameter of the replacement; the angle substitute, on its edges, has threads that have intersecting axes, and the maximum distance between the axes of the threads is equal to the eccentricity of the rotor with respect to the stator. A disadvantage of this known design is the following: fix another angle value and compensate the lateral force imparted by the drill bit using the reaction moment that occurs in the substitute, the motor and the axis of the drill string at an angle, the uncoupling of the mandrel motor is necessary, so that the substitute can be replaced. Another disadvantage of this known design consists in an incomplete use of the possibilities of compensating for the lateral force imparted by the drill bit (at a certain angle value in the substitute), and in a narrow range of said force, since the distance Longer between threads that intersect does not exceed the value of the eccentricity of the rotor with respect to the stator.

This circumstance does not allow to compensate the positive and negative peaks of the fluctuations of the axial load on the drill bit, and to maintain the optimum axial load on the drill bit, maintaining the current values of the axial load without loss of stability of a string drilling at an angle, in a slanted direction. The angle regulators are known, which consist of a central hollow element and three hollow, mutually misaligned tubular elements, connected to the central element; each of said three tubular elements has an internal through opening; wherein the hollow tubular element is disposed in the center between the first and second elements, and the first and second tubular elements are connected to the internal hollow tubular element, by the threads provided at their edges, facing each other; the first and second tubular elements being connected by a thread to the housing of the gerrotor-type motor (US Pat. No. 5,343,966, E 21B7 / 08, 1994). In this known design, the first and second tubular elements are adapted to connect the motor housing of the gerrotor type to the mandrel or to the drill pipe; the central and internal hollow tubular elements are interconnected by a grooved joint and provide the restoration of a new angle value when the drill string is lifted, without uncoupling the motor that is lowered to the bottom of the hole. A disadvantage of this prior art design is the lack of lateral force compensation imparted by the drill bit by the use of the reaction moment occurring on the angle regulator, the motor and the mandrel of an inclined drill string. , during the penetration through a heterogeneity of the bottom of the well. In these circumstances, the optimization of the penetration wells is difficult to achieve, due to the difficulty to correct the component of the lateral force exerted on the drill bit.; force that effects the moment of bending by reaction that changes its direction (signal) when a drill string at an angle, directed in a biased direction, loses its stability (see Gazovaya Promyshlennost Journal [Gas Industry], February 1998], page 42 -44). This difficulty affects the precision of the deepening of the inclined wells, due to the unpredictable component of the lateral force exerted on the drill string, so that the drilling parameters can not be optimized, and in particular, the optimum axial load acting The drill string can not be maintained by preserving the current values of axial load without loss of stability of the drill string at an angle. The most relevant technique for the claimed design is a regulator of the angle and moment of reaction of a gerotor-type motor, comprising: a central hollow element and three hollow tubular elements, connected with the central hollow element; each of said hollow tubular elements has a through opening; a first hollow tubular element having an axis; a second tubular element having another axis; a hollow internal element, which is arranged in the center, between the first and second elements, and having a third axis; wherein the first and second tubular elements are connected to the internal hollow element by means of the threads provided on the mutually facing edges; the first hollow tubular element is connected to a mandrel by a thread; the second hollow tubular element is connected to the motor housing by means of a thread; the central hollow element is connected to the internal hollow element, by grooves; the internal hollow element has threads on its edges; the threads have intersecting axes that cross the central axis; the longest distance between the axes of the thread is double the value of the eccentricity of the rotor, with respect to the stator of the gerrotor-type motor; the longest distance between its central axis and the axes of any of the threads at its edges equals the eccentricity of the rotor with respect to the stator of the gerrotor-type motor (US Patent 2,186,923, E 21B4 / 02, 7/08, 2000 ). A disadvantage of this known design is the incomplete use of the possibility of increasing the deflection angle and improving the penetration capacity of the gerrotor-type motor, which has a mandrel and a drill bit in an angle drill string, by means of the compensation of the resultant radially unbalanced force generated during the rotation of a drill bit in a drill hole. In this prior art design, the regulator does not have its own sections of contact segments; sections that would improve the stability of a drill string at an angle, for example, any sections that would be provided on different sides with respect to the bending plane of the string, and would ensure continuous contact with the wall of the drill hole at the moment of drilling, and would also further increase the penetration accuracy within a bottomhole heterogeneity, by providing an optimum axial load on the drill bit, without loss of drilling string stability at an angle.

BRIEF DESCRIPTION OF THE INVENTION The technical problem to be solved by the invention consists in improving the stability of a gerrotor-type motor, the regulator and the mandrel in the angle plane of the drill string; increase a deflection angle and improve the penetration capacity of a gerotor-type motor having a mandrel and a drill bit in a drill string inclined at an angle, compensating for the resulting radially unbalanced force generated during the rotation of a drill of drilling in a well hole, and keeping the segmental sections of own contact in the regulator, on different sides, with respect to the angle plane of the drill string, in contact with the well hole while drilling, as well as by an increased penetration accuracy in a downhole heterogeneity, by providing an optimum axial load on the drill bit, without loss of stability in the drill string at an angle. The essence of the claimed technical solution is the following: in a regulator of angle and moment of reaction of a gerrotor-type motor, which has a mandrel and a drill bit in an angle drilling string, consisting of a hollow element central and three hollow, mutually misaligned tubular elements, connected to the central hollow element; each of the three elements has an internal through opening; the internal hollow element is disposed in the center, between the first and second elements; the first and second tubular elements are connected to the internal hollow element by means of the threads provided at their edges which look at each other; the first hollow tubular element being connected to the mandrel, by means of a thread, the second hollow tubular element being connected to the motor housing of the reciprocating rotor type by means of a thread; the central hollow element being connected to the internal hollow element by means of grooves; the internal hollow element having threads on its edges; the threads having crossed axes, and cross the central axis of the hollow internal element; the longest distance between the threads is double the value of the eccentricity of the rotor with respect to the stator of the gerrotor-type motor; the maximum distance between its central axis of the hollow internal element and any of the threads at its edges, is equal to the eccentricity of the rotor with respect to the stator of the gerrotor-type motor; The central hollow section and the first hollow tubular element, on the side where the first element is connected to the mandrel, are both provided with their own segmental contact section; and said segmental contact sections constitute the pair of the segmental contact sections arranged on different sides with respect to the meridian plane of the mandrel in the inclination plane of the drill string; where the proximal edges of the segmental contact sections are arranged along the central axis, at a distance L, which has the following relationship with the outer diameter of the mandrel: D: L > . D; and the angular deviation of the contact segmental section of the first hollow tubular element (in cross section) from the meridian plane of the mandrel, in the inclination plane of the drill string, is provided in the opposite direction with respect to the imparted reaction moment by the drill bit. Additionally, the generatrices of the segmental contact sections in the central hollow element and in the first hollow tubular element are disposed on the outer face of a respective tubular element, and each of the segmental contact sections comprises rows of teeth or bolts, secured in the tubular element; where the hardness of the teeth or bolts is greater than that of the sections. The implementation of the central hollow element and the first tubular element, on the side where the first element is connected to the mandrel, is such that each of the elements has its own segmental section, so that they constitute together pairs of segmental sections of contact, arranged on different sides with respect to the meridian plane of the mandrel in the inclination plane of the drill string, and along the central axis of the first hollow element; and the sections are disposed at a distance L between the proximal edges of the segmental contact sections, distance having the following relationship with the outer diameter of the mandrel: D: L > _ D; wherein the angular deviation of the contact segmental section of the first hollow tubular member from the meridian plane of the mandrel in the inclination plane of the drill string is provided in the opposite direction with respect to the reaction moment imparted by the drill bit; what allows the displacement of the boring center of the drill bit coniras its roiation, and compensates for the force that acíúa in the head of the slant of the inclined well, preventing in that way a change in the angle of inclination caused by the re -distribution of the reactions of the force that affected the drill bit, depending on the axial load, without loss of siability of the drill rig inclined. This arrangement allows to optimize and improve the accuracy of the deepening of the well, due to an increased precision in the correction of the component of the lathe force that acts on the drill bit; compose that makes the moment of inclination that alíera its direction (sign) when the drill slant inclined loses esiability. The disposition of the generairices of the segmental sections of conical in the hollow elemental element and in the first hollow bulbar elemenio, on the exíerna surface of the respective lubular element, and the provision of each of the segmental sections of contact with the rows of teeth or bolts secured in the tubular element; the hardness of said dienies or bolts is greater than that of the sections; improves the stability of the gerrofor type motor, the regulator and the mandrel in the inclination plane of the drilling rig; It prolongs the service life of the regulator when it degass that confers the walls of the well, and ensures the compensation of the positive and negative peaks of the fluciuaciones of the axial load on the drilling bit, as well as the axial load on the drill bit perforation, by preserving the axial values of axial load without loss of stability of a drilling rig inclined in a biased direction. In general, this technical solution allows to compensate the radially unbalanced force, which is generated during the drill bit operation in the bottom of the well, and to maintain its own segmental contact sections in the regulator, in different sides with respect to the plane of inclination of the drill string, in coníacfo with the wall of the well hole, at the time of drilling.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a model of a gerroor that has an angle regulator and the moment of reaction; a mandrel and a drill bit in an inclined drilling rig. Figure 2 shows the element I illustrated in figure 1, of the exit portion of the gerroir engine; mofor that is connected to the mandrel by means of the angle and momentum regulator. Figure 3 shows the angle regulator and the reaction time of the gerotor-type motor in the inclination plane of the drill string. Figure 4 shows an angle section following the line A-A of figure 3. Figure 5 shows a section, outlined following line B-B of figure 3. Figure 6 shows a visis in perspective of the first hollow bulbar element. Figure 7 shows the first hollow fibrous element in the section ignited following the axis of its threaded edge. Figure 8 shows a perspective view of the internal hollow tubular element. Figure 9 shows a perspective view of the central hollow element. Figure 10 shows the section taken along line C-C of Figure 2.

BEST WAY TO PUT INTO PRACTICE THE INVENTION It is shown in figures 1 and 2 a motor 1 of the gerroor type, which has a regulator 2 of angle and moment of reaction, a mandrel 3 and a drill bit 4, in a sarfa inclined perforation 5. The regulator 2 of angle and moment of reaction of the mofor 1 of the gerroor type consists of a central hollow element 6 (figure 3) and hollow tubular elements 7, 8 and 9, connected with the central element 6; Each of the elementary elements having an initial aberration will pass 10, 11, 12, respectively. The first hollow bulbar element 7 has an axis 13; the second tubular element 8 has an axis 14, and the hollow internal tubular element 9 is disposed in the center, between the first tubular element 7 and the second tubular element 8, and has an axis 15 (figures 3, 4). The hollow central hollow tubular element 6 is connected to the inverse hollow tubular element 9 by means of grooves 16 (FIGS. 4, 9). The first hollow fluted element 7 and the second hollow tubular element 8 are connected to the inverse hollow element 9 by means of threads 17, 18, at the edges 19, 20 which remain frenfe a frenfe. An edge 21 of the first hollow bulge element 7, and an edge 22 of the hollow central element 6 are provided with grooves 23, using said grooves a desired value of angle and reaction moment of the regulator is fixed (figures 4, 6, 9) . The first hollow tubular element 7 was connected, by means of a thread 24, to the housing 25 of mandrel 3 of moratorium 1 of the gerrotor type. The axes 26 and 27 of the threads 17 and 18 at the edges 28, 29 of the inverse hollow element 9 (FIG. 4) intersect each other, and with the center axis 15 of the hollow element 9. The maximum distance between the axes 26 and 27 of the threads 17 and 18 is 2E, that is, twice the value of the eccentricity E of a rofor 30 with respect to a stator 31 of the motor 1 of the gerrotor type (FIGS. 4, 10). The maximum distance between the central axis 15 of the inverse hollow element 9 and the axes 26 and 27 of the threads 17 and 18 at their edges 28 and 29 is equal to the eccentricity E of the rofor 30 with respect to the axis 31 of the molar 1 of gerroíor fipo (figures 4, 10). The axes 26, 27 at the edges 28, 29 of the hollow internal element 9, exposed to the asymmetric load exerted by the reaction moment of the gerotor-type motor, are arranged, respectively, at different distances e1 and e2 from their central axis. (figure 4). The angle α is formed between the central axis 15 of the inverse hollow element 9 and the axis 27 of the thread 18. The angle ß is formed between the central axis 15 of the inverse hollow element 9 and the axis 26 of the thread 17. The first can the tilting axis 13 of its threaded portion 24 have the angle? with respect to the central axis 15 of the hollow inertial flaring element.

Each of the hollow central element 6 and the first hollow bulbar elemenum 7, on the side of its connection to the mandrel 3, it is provided with its own segmental conjoint section 32, 33, respectively, which constitute the pair of the segmentary contact sections disposed on different sides with respect to the meridian plane 34 of the mandrel 3, in the inclination plane of the drill string, for example, in the plane of Figure 1. The proximal edges 35, 36 of the segmental sections 32, 33, are disposed at a distance L, along the axis 15 of the first hollow flute element 7, disiancia that is the following relation with the former diameter D of the mandril 3: L >; D; (Figures 2, 4). The angular deviation 37 of the confocal section 33 of the first hollow bulging element 7 (in cross section) from the meridian plane 34 of the mandrel, in the inclination plane of the drill string 5, is provided in the opposite direction with respec at the Mr moment impaired by the drill bit 4 (figure 5). The generairices 38 of the segmental sections 32, 33, in the hollow elemental part 6 and in the first hollow bulbar elemenion 7 are arranged on the outer surface 39 of the respective hollow element 6 or 7 (FIG. 2). The segmental contact sections 32, 33 comprise rows of teeth or bolts 40, secured in their walls; the hardness of said teeth or bolts is greater than that of the sections 32, 33 of the respective fugular element 6 or 7 (figures 6, 7, 9). The regulator of angle and reactive moment of the geriferous temperature, which comes from the mandrel and the drill bit in the inclined drilling bush, operates as follows: A pressurized flood fluid is supplied through the sill of the drilling rig. perforation 5, to the helical cavities formed between the rotor 30 and the rotor 31. There is a torque of torsion on the rotor 30, and causes its orbital movement around the rotor 31, movement that, by means of cardan shafts, the Transmission arrow converts to ripple movement of a mandrel 3 and drill bit 4. When drilling heterogeneous rocks, in the angle regulator 2 and the moment of reaction, and also in the mandrel 3, the parameter 1 moíor Gerroor and the drill bit 4 the moment of reactive inclination M4 occurs due to the shear forces applied on the drill bit 4. Said moment of reaction Mr is compensated or due to the presence of the internal hollow tubular element 9, which has the axes 26 and 27 of the threads 17, 18, on its edges 28, 29; axes that intersect one with ofro and with the center axis 15 of the aforementioned element. The orbital motion of the rotor 30 of the rotor 31 is directed opposite to the transmission of torque from the rotor 30 to the mandrel 3 and the drill bit 4. A displacement or deviation (in cross section) of the axes 26 and 27 with with respect to the axis 15 it is carried out against the rotation of the drill bit 4, since in this case, no loss of direction was observed, that is, a sign of the stability of the string deviated in the positive and negative peaks of the fluctuations of the the axial load on the drill bit 4. The precision of the displacement of the center of rotation of the drill bit 4 against the rotation of the drill bit, ie against its torque Mt, is further improved by the provision of each of the central hollow element 6 and the first hollow tubular element 7, on the side where the element 7 connects with the mandrel 3, with its own segmental sections of 32, 33 , respectively, which constitute a pair of the segmentary cones sections disposed on different sides with respect to the meridian plane 34 of the mandrel 3, in the inclination plane of the drill string 5; and along the central axis 15 of the first hollow tubular element 7, are disposed at the gap L, enwire the proximal edges of the segmental conical sections 32, 33; Disance that follows the relationship with the outer diameter of the mandrel D: L > D, and also together, form the angular deviation 37 of the segmental segment 33 of the first hollow bulge element 7, from the meridian plane 34 of the mandrel in the inclination plane of the drill string; deviation that is provided in the opposite direction with respect to the moment of reaction Mr, allocated by the drill bit 4.

This arrangement allows to opimimize and compensate the lateral force in the head of the drill string inclined, which prevents a change in the angle of inclination due to the redistribution of the reactions of the lateral force acting on the drill bit, depending on the axial load, without loss of stability of a bent drill string. In practice, a vertical hole is drilled to a predetermined depth. Then the drill string is lifted, the hollow inferoal elements 7 and / or 8 are partially unscrewed in the thread 17 and / or 18, after which the central hollow element 6 is moved slidably along the grooves. When this occurs, the grooves 23 of the first hollow tubular element 7 are decoupled from the central hollow element 6 in order to isolate a desired value of the angle and the reaction moment of the molar 1 with a rotating gear. The claimed design of the regulator improves the stability of the gerroor-type mofor, the regulator and the mandrel in the inclination plane of the drill string, increases the angle of deviation and improves the penetration accuracy in a downhole heterogeneity by to the gerotor motor that comes with the mandrel and the drill bit in the inclined drilling bit, mediating the use of radially unbalanced force compensation, resulting, which is generated during the rotation of the drill bit at the bottom of the well , and retaining the segmental sections of own contac on the regulator, on different sides with respect to the inclination plane of the drilling rig, in conjunction with the wall of the well hole, during the drilling.

INDUSTRIAL APPLICABILITY The invention can be suitably used in the oil and gas producing industry, to extract oil and gas from wells, and also in industrial environments, in which electric moirares are used.

Claims (2)

1. - A regulator of angle and moment of reaction of a molar type of gerroor, which comes with a mandrel and a drill bit in an inclined drilling tunnel, comprising: a central hollow element and three hollow tubular elements, mutually misaligned, connected to the central hollow element; each of the three tubular elements has an internal through opening; the internal hollow tubular element is disposed at the center, between the first and second elements; the first and second tubular elements are connected to the inubrious hollow bulbar ele- mence by means of threads provided at their edges, which are looked at very mutely; the first fumular element is connected by a thread to the mandrel; the second hollow fluted element is connected by a thread to the motor housing; the hollow central element is connected to the hollow inlet element, by means of grooves; the internal hollow element has threads on its edges; the threads have axes that cross each other and with the central axis of the internal hollow element; the maximum distance between the axes of the threads is double the value of the rotor's eccentricity with respect to the stator of the gerrotor-type motor; the maximum distance between the central axis of the internal hollow element and any of the threads at its edges is equal to the eccentricity of the rotor with respect to the stator of the gerotor-type motor; characterized in that: the central hollow element and the first hollow tubular element, on the side in which the first element is connected to the use, both are provided with their own segmental section of coniact; and the segmentary conical sections constitute a pair of segmental cones sections disposed on different sides with respect to the meridian plane of the mandrel in the inclination plane of the drill string; where the proximal edges of the segmental counting sections are arranged along the central axis, at a distance L, which has the following relationship with the outer diameter of the mandrel D: L > D; and the angular deviation of the contact segmental section of the first hollow tubular member, from the meridian plane of the mandrel in the inclination plane of the drill string, is provided in the opposite direction relative to the reaction moment imparted by the drill bit. drilling.

2. The angle regulator and the moment of reaction of a gerotor-type motor, according to claim 1, further characterized in that the generatrices of the segmental sections of the central hollow element and the first hollow tubular element, they are arranged on the external face of the respective tubular element; and each contact segmental section comprises rows of teeth or bolts secured in the tubular member; where the hardness of the teeth or bolts is greater than that of the sections.