CN217681559U - Screw drill assembly - Google Patents

Abstract

The utility model provides a screw drill tool assembly, which relates to the technical field of screw drill tools and comprises a rotating shaft and a bearing shell, wherein the rotating shaft is sequentially sleeved with a lower TC bearing moving coil, a thrust bearing and an upper TC bearing moving coil, the outer rotating sleeve of the lower TC bearing moving coil is sleeved with a lower TC bearing static coil, the outer rotating sleeve of the upper TC bearing moving coil is sleeved with an upper TC bearing static coil, and the bearing shell is sleeved outside the rotating shaft and is simultaneously connected with the lower TC bearing static coil and the upper TC bearing static coil; and carbide wear-resistant layers are arranged between the lower TC bearing moving coil and the lower TC bearing static coil and between the upper TC bearing moving coil and the upper TC bearing static coil. The carbide wearing layer promotes the wearability between TC bearing movable coil and the lower TC bearing static coil and between last TC bearing movable coil and the last TC bearing static coil down, has increased the life of product.

Description

Screw drill assembly

Technical Field

The utility model relates to a screw rod drilling tool technical field, more specifically relates to a screw rod drilling tool subassembly.

Background

The screw drilling tool is a downhole power drilling tool which is most widely used in petroleum exploration and development at present, is mainly used for deflecting and twisting azimuth construction of directional wells and horizontal wells, and is partially used for drilling/repairing special process wells such as straight well left-hand thread or sidetracking windowing. The rotating shaft assembly comprises a rotating shaft and a shell thereof, an upper radial bearing, a lower radial bearing, a thrust bearing group, a water cap and the like.

In the drilling construction process, the lower end of the rotating shaft of the screw drilling tool is connected with a drill bit, the stress change of the drill bit is large when the drill meets a special rock stratum or under a complex working condition, the rotating shaft bears alternating loads such as axial load, radial load, torque and the like, and the stress is complex, so that large friction can be generated between a moving ring and a static ring of an upper radial bearing and a lower radial bearing, and the service life is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a screw rod drilling tool subassembly has better wearability between the movable coil and the quiet circle of radial bearing and lower radial bearing on it, has increased its life, has solved the problem among the above-mentioned background art.

The embodiment of the utility model is realized like this:

some embodiments of the utility model provide a screw rod drilling tool subassembly, including axis of rotation and bearing housing, the axis of rotation is the step shaft, the cover is equipped with lower TC bearing movable coil, thrust bearing and upper TC bearing movable coil in proper order on the axis of rotation, the outer movable sleeve of lower TC bearing movable coil is equipped with lower TC bearing quiet circle, the outer movable sleeve of upper TC bearing movable coil is equipped with upper TC bearing quiet circle, bearing housing cover is established in the axis of rotation outside and is connected with lower TC bearing quiet circle and upper TC bearing quiet circle simultaneously;

the side wall of the lower TC bearing movable coil facing to the lower TC bearing static coil, the side wall of the lower TC bearing static coil facing to the lower TC bearing movable coil, the side wall of the upper TC bearing movable coil facing to the upper TC bearing static coil and the side wall of the upper TC bearing static coil facing to the upper TC bearing movable coil are all provided with carbide wear-resistant layers.

The utility model discloses an in some embodiments, still include the pin, first pinhole has been seted up to the lateral wall of lower TC bearing movable coil, and the second pinhole that corresponds with first pinhole is seted up to the lateral wall of axis of rotation, and lower TC bearing movable coil is connected with the axis of rotation through the pin of wearing to establish first pinhole and second pinhole simultaneously.

The utility model discloses an in some embodiments, still include the jump ring, the draw-in groove has been seted up to the inner wall of first pinhole, and the draw-in groove is located to the jump ring card, the tip and the jump ring butt of pin.

In some embodiments of the present invention, the first pin holes and the second pin holes are provided in plural, the first pin holes are uniformly arranged around the side wall of the lower TC bearing moving coil, and the second pin holes are arranged in one-to-one correspondence with the first pin holes.

In some embodiments of the present invention, the opposite ends of the upper TC bearing static ring and the lower TC bearing static ring are provided with the first external thread portion, and the two ends of the bearing housing are respectively provided with the first internal thread portion matched with the upper TC bearing static ring and the lower TC bearing static ring.

In some embodiments of the present invention, the first external thread portion and the first internal thread portion have a thread direction opposite to a relative rotation direction of the rotation shaft and the bearing housing.

In some embodiments of the present invention, the end of the rotating shaft is provided with a second external thread portion, and the end of the upper TC bearing moving coil is provided with a second internal thread portion matching the second external thread portion.

In some embodiments of the present invention, an outer adjustment ring is clamped between the end of the first outer threaded portion of the upper TC bearing stationary ring and the end of the outer ring of the thrust bearing, and an inner adjustment ring is clamped between the end of the second inner threaded portion and the end of the inner ring of the thrust bearing.

In some embodiments of the utility model, the tip that lower TC bearing quiet circle was kept away from to upper TC bearing quiet circle is provided with the threaded connection portion that is used for with outside cardan shaft connection.

In some embodiments of the present invention, the thrust bearing is a multi-row radial thrust ball bearing.

Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:

the utility model provides a screw drilling tool assembly, including axis of rotation and bearing housing, the axis of rotation is the step shaft, overlap in proper order on the axis of rotation and be equipped with lower TC bearing movable coil, thrust bearing and upper TC bearing movable coil, the outer movable sleeve of lower TC bearing movable coil is equipped with lower TC bearing stationary coil, the outer movable sleeve of upper TC bearing movable coil is equipped with upper TC bearing stationary coil, bearing housing cover is established in the axis of rotation outside and is connected with lower TC bearing stationary coil and upper TC bearing stationary coil simultaneously; the side wall of the lower TC bearing movable ring towards the lower TC bearing static ring, the side wall of the lower TC bearing static ring towards the lower TC bearing movable ring, the side wall of the upper TC bearing movable ring towards the upper TC bearing static ring, and the side wall of the upper TC bearing static ring towards the upper TC bearing movable ring are all provided with carbide wear-resistant layers.

The rotating shaft, the lower TC bearing moving coil, the thrust bearing and the upper TC bearing moving coil are taken as a first whole, and the bearing shell, the lower TC bearing static coil and the upper TC bearing static coil are taken as a second whole. In the drilling construction process, the first whole body and the second whole body rotate relatively, and large friction can be generated between the lower TC bearing movable ring and the lower TC bearing static ring and between the upper TC bearing movable ring and the upper TC bearing static ring. The carbide wear-resistant layer improves the wear resistance of the friction part and prolongs the service life of the product.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a sectional view of the overall structure of a screw drill assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view of the connection structure of the rotating shaft, the lower TC bearing moving coil and the lower TC bearing stationary coil according to the embodiment of the present invention;

FIG. 3 is an exploded view of the connection structure of the rotating shaft, the lower TC bearing moving coil, the lower TC bearing stationary coil and the bearing housing according to the embodiment of the present invention;

FIG. 4 is an exploded view of the connection structure of the rotating shaft, the upper TC bearing moving ring, the upper TC bearing stationary ring and the bearing housing in accordance with the embodiment of the present invention;

FIG. 5 is an exploded view of another angle connection structure of the rotating shaft, the upper TC bearing moving coil, the upper TC bearing stationary coil and the bearing housing according to the embodiment of the present invention;

FIG. 6 is an enlarged view of a portion A of FIG. 1;

FIG. 7 is an enlarged view of a portion of FIG. 3 at B;

fig. 8 is a partial enlarged view of fig. 1 at C.

Icon: 1-a rotating shaft; 2-a bearing housing; 3-lower TC bearing moving coil; 4-a thrust bearing; 5-mounting a TC bearing moving coil; 6-lower TC bearing static ring; 7-upper TC bearing static ring; 8-carbide wear layer; 9-a first pin hole; 10-a second pin hole; 11-a pin; 12-a card slot; 13-a clamp spring; 14-a first external threaded portion; 15-a first internal threaded portion; 16-a second external thread; 17-a second internal threaded portion; 18-a friction segment; 19-a first connection section; 20-a second connection section; 21-a threaded connection; 22-polygonal section; 23-outer adjusting backing ring; 24-inner adjusting backing ring.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Examples

Please refer to fig. 1-8.

The utility model provides a screw rod drilling tool subassembly: the device comprises a rotating shaft 1 and a bearing shell 2, wherein the rotating shaft 1 is a stepped shaft, a lower TC bearing moving coil 3, a thrust bearing 4 and an upper TC bearing moving coil 5 are sequentially sleeved on the rotating shaft 1, a lower TC bearing static coil 6 is sleeved outside the lower TC bearing moving coil 3 in a rotating manner, an upper TC bearing static coil 7 is sleeved outside the upper TC bearing moving coil 5 in a rotating manner, and the bearing shell 2 is sleeved outside the rotating shaft 1 and is simultaneously connected with the lower TC bearing static coil 6 and the upper TC bearing static coil 7; the side wall of the lower TC bearing moving coil 3 facing the lower TC bearing static coil 6, the side wall of the lower TC bearing static coil 6 facing the lower TC bearing moving coil 3, the side wall of the upper TC bearing moving coil 5 facing the upper TC bearing static coil 7, and the side wall of the upper TC bearing static coil 7 facing the upper TC bearing moving coil 5 are all provided with carbide wear-resistant layers 8.

In this embodiment, based on as shown in fig. 1, fig. 3 and fig. 4, the rotating shaft 1 is a stepped shaft, and has three shaft sections with successively decreasing diameters, the middle shaft section is sleeved with the lower TC bearing moving coil 3, and the outer side of the lower TC bearing moving coil 3 is rotatably sleeved with the lower TC bearing stationary coil 6. The upper TC bearing moving coil 5 is arranged at the end part of the rotating shaft 1, and the outer side of the upper TC bearing moving coil 5 is rotatably sleeved with an upper TC bearing static coil 7. The rotating shaft 1, the lower TC bearing moving coil 3, the thrust bearing 4 and the upper TC bearing moving coil 5 are taken as a first whole, and the bearing shell 2, the lower TC bearing static coil 6 and the upper TC bearing static coil 7 are taken as a second whole.

In the drilling construction process, the first whole body and the second whole body rotate relatively, and large friction is generated between the lower TC bearing moving coil 3 and the lower TC bearing static coil 6 and between the upper TC bearing moving coil 5 and the upper TC bearing static coil 7. The carbide wear-resistant layer 8 improves the wear resistance of the friction part and prolongs the service life of the product.

The concrete connection mode of each part in the screw drill assembly is as follows:

based on that fig. 1, fig. 3, fig. 6 and fig. 7 show, first pinhole 9 has been seted up to the lateral wall of lower TC bearing moving coil 3, and the second pinhole 10 that corresponds with first pinhole 9 has been seted up to the middle part shaft part lateral wall of axis of rotation 1, and lower TC bearing moving coil 3 is through wearing to establish first pinhole 9 and second pinhole 10's pin 11 and axis of rotation 1 fixed connection simultaneously to realize the synchronous rotation of lower TC bearing moving coil 3 and axis of rotation 1. Simultaneously, draw-in groove 12 has been seted up at the inner wall of first pinhole 9, and draw-in groove 12 inside callipers is equipped with jump ring 13 to stop pin 11, prevent that pin 11 from dropping because of factors such as vibrations. Meanwhile, the end of the pin 11 abuts against the snap spring 13 to prevent the pin 11 from moving.

Preferably, the number of the first pin holes 9, the second pin holes 10 and the pins 11 is four, the four first pin holes 9 are uniformly arranged around the side wall of the lower TC bearing moving coil 3, the four second pin holes 10 are arranged in one-to-one correspondence with the fourth first pin holes 9, the pins 11 are arranged in each group of the first pin holes 9 and the second pin holes 10, and the pins 11 are all fixed by the snap springs 13, so that the uniformity of the connection strength between the lower TC bearing moving coil 3 and the rotating shaft 1 in each direction is ensured.

In other embodiments than the above embodiments, the number of the first pin holes 9, the second pin holes 10, and the pins 11 may be three or five, and the designer may adjust the number adaptively according to the actual load situation.

Further, the thrust bearing 4 is a multi-row radial thrust ball bearing, and in the present embodiment, an eleven-row radial thrust ball bearing is used. Twelve columns or thirteen columns, etc. may be provided in other embodiments depending on the actual size.

Further, based on fig. 1 to 5, the opposite ends of the upper TC bearing stationary ring 7 and the lower TC bearing stationary ring 6 are provided with first external thread portions 14, and the two ends of the bearing housing 2 are provided with first internal thread portions 15 respectively matching with the upper TC bearing stationary ring 7 and the lower TC bearing stationary ring 6. The upper TC bearing static ring 7 and the lower TC bearing static ring 6 are respectively screwed at two ends of the bearing shell 2 so as to realize synchronous rotation of the two. Meanwhile, the first male screw portion 14 and the first female screw portion 15 are screwed in the opposite direction to the relative rotation direction of the rotary shaft 1 and the bearing housing 2, i.e., the first male screw portion 14 and the first female screw portion 15 are rotated in the screwing direction in use, to prevent the screw from being loosened due to the rotation during the operation.

Further, based on fig. 1 to 5, the end of the rotating shaft 1 is provided with a second external thread portion 16, and the end of the upper TC bearing moving coil 5 is provided with a second internal thread portion 17 that matches the second external thread portion 16. The upper TC bearing moving coil 5 is connected with the rotating shaft 1 in a screwing way so as to realize the synchronous rotation of the upper TC bearing moving coil and the rotating shaft.

In detail, the upper TC bearing moving coil 5 includes a friction section 18, and a first connection section 19 and a second connection section 20 respectively located at two sides of the friction section 18, the diameter of the friction section 18 is greater than that of the connection sections, and the first connection section 19, the second connection section 20 and the friction section 18 are all located inside the upper TC bearing stationary coil 7. The friction section 18 and the inner wall of the upper TC bearing static ring 7 rotate in a friction mode, and a gap is reserved between the first connecting section 19 and the second connecting section 20 and the inner wall of the upper TC bearing static ring 7 to prevent friction. The carbide wear layer 8 is arranged in the friction segment 18. The end of the first coupling section 19 is provided with the above-mentioned second internally threaded portion 17 to achieve the connection with the rotating shaft 1, and the end of the second coupling section 20 is also provided with an internal thread as a threaded connection portion 21 to achieve the connection with an external, externally threaded, universal shaft. Meanwhile, a polygonal section 22, for example, a hexagonal section, is provided around the end outer sidewall of the second connection section 20 to facilitate the screwing of the upper TC bearing moving coil 5 to the rotating shaft 1 by an externally mating torque wrench having a polygonal groove. The upper TC bearing moving coil 5 and the rotating shaft 1 can be fastened according to standard torque through the torque wrench.

In other embodiments than the above, if the external universal shaft has an internal thread, the threaded connection portion 21 needs to be correspondingly provided with an external thread.

Further, as shown in fig. 1 and 8, an outer adjustment grommet 23 is interposed between the end of the first male screw portion 14 of the upper TC bearing stationary ring 7 and the end of the outer ring of the thrust bearing 4, and an inner adjustment grommet 24 is interposed between the end of the second female screw portion 17 and the end of the inner ring of the thrust bearing 4.

In the present embodiment, the inner adjusting backing ring 24 and the outer adjusting backing ring 23 with specific thicknesses are provided to compensate for the error gap between the thrust bearing 4 and the upper TC bearing static ring 7 and the upper TC bearing moving ring 5, so as to ensure the tightness of the installation between the components.

To sum up, the utility model provides a screw drilling tool assembly, including axis of rotation 1 and bearing shell 2, axis of rotation 1 is the step shaft, the cover is equipped with lower TC bearing movable coil 3, thrust bearing 4 and upper TC bearing movable coil 5 on the axis of rotation 1 in proper order, the outer rotating sleeve of lower TC bearing movable coil 3 is equipped with lower TC bearing stationary coil 6, the outer rotating sleeve of upper TC bearing movable coil 5 is equipped with upper TC bearing stationary coil 7, bearing shell 2 is established outside axis of rotation 1 and is connected with lower TC bearing stationary coil 6 and upper TC bearing stationary coil 7 simultaneously; the side wall of the lower TC bearing moving coil 3 facing the lower TC bearing static coil 6, the side wall of the lower TC bearing static coil 6 facing the lower TC bearing moving coil 3, the side wall of the upper TC bearing moving coil 5 facing the upper TC bearing static coil 7, and the side wall of the upper TC bearing static coil 7 facing the upper TC bearing moving coil 5 are all provided with carbide wear-resistant layers 8.

The rotating shaft 1, the lower TC bearing moving coil 3, the thrust bearing 4 and the upper TC bearing moving coil 5 are taken as a first whole, and the bearing shell 2, the lower TC bearing static coil 6 and the upper TC bearing static coil 7 are taken as a second whole. In the drilling construction process, the first whole body and the second whole body rotate relatively, and large friction is generated between the lower TC bearing moving coil 3 and the lower TC bearing static coil 6 and between the upper TC bearing moving coil 5 and the upper TC bearing static coil 7. The carbide wear-resistant layer 8 improves the wear resistance of the friction part and prolongs the service life of the product.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the details of the foregoing illustrative embodiments, and that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A screw drilling tool assembly is characterized by comprising a rotating shaft and a bearing shell, wherein the rotating shaft is a stepped shaft, a lower TC bearing moving ring, a thrust bearing and an upper TC bearing moving ring are sequentially sleeved on the rotating shaft, a lower TC bearing static ring is sleeved outside the lower TC bearing moving ring in a rotating manner, an upper TC bearing static ring is sleeved outside the upper TC bearing moving ring in a rotating manner, and the bearing shell is sleeved outside the rotating shaft and is simultaneously connected with the lower TC bearing static ring and the upper TC bearing static ring;

lower TC bearing movable coil orientation the lateral wall of lower TC bearing quiet circle orientation the lateral wall of lower TC bearing movable coil, go up TC bearing movable coil orientation the lateral wall of last TC bearing quiet circle, go up TC bearing quiet circle orientation the lateral wall of going up TC bearing movable coil all is provided with the carbide wearing layer.

2. The progressive cavity drill assembly of claim 1, further comprising a pin, wherein a first pin hole is formed in a side wall of the lower TC bearing moving coil, a second pin hole corresponding to the first pin hole is formed in a side wall of the rotating shaft, and the lower TC bearing moving coil is connected to the rotating shaft through the pin passing through the first pin hole and the second pin hole simultaneously.

3. The screw drill assembly according to claim 2, further comprising a snap spring, wherein a clamping groove is formed in the inner wall of the first pin hole, the snap spring is clamped in the clamping groove, and the end portion of the pin abuts against the snap spring.

4. The progressive cavity drill assembly of claim 2, wherein the first pin holes and the second pin holes are each provided in plurality, the first pin holes are uniformly arranged around the side wall of the lower TC bearing moving coil, and the second pin holes are arranged in one-to-one correspondence with the first pin holes.

5. The progressive cavity drill assembly of claim 1 wherein the opposite ends of the upper TC bearing stationary ring and the lower TC bearing stationary ring are each provided with a first external threaded portion, and the opposite ends of the bearing housing are each provided with a first internal threaded portion that mates with the upper TC bearing stationary ring and the lower TC bearing stationary ring.

6. The screw drill assembly according to claim 5, wherein the first externally threaded portion and the first internally threaded portion are threaded in a direction opposite to the relative rotational direction of the rotary shaft and the bearing housing.

7. The progressive cavity drill assembly of claim 5 wherein the end of the rotating shaft is provided with a second external thread portion and the end of the upper TC bearing moving coil is provided with a second internal thread portion that mates with the second external thread portion.

8. The progressive cavity drill assembly of claim 7 wherein an outer adjustment grommet is captured between an end of the first outer threaded portion of the upper TC bearing stationary ring and an end of the outer race of the thrust bearing and an inner adjustment grommet is captured between an end of the second inner threaded portion and an end of the inner race of the thrust bearing.

9. The progressive cavity drill assembly of claim 1 wherein the end of the upper TC bearing stationary ring distal from the lower TC bearing stationary ring is provided with a threaded connection for connection with an external universal shaft.

10. The progressive cavity drill assembly of claim 1 wherein the thrust bearing is a plurality of rows of radial thrust ball bearings.

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