CN210714511U - Centering guide - Google Patents

Abstract

The utility model provides a centralizer, include: a central tube; the inner hole of the centering ring is matched with the outer wall of the central tube, the centering ring is sleeved on the central tube, and the centering ring is detachably connected with the central tube; the centering rings are arranged at intervals along the extending direction of the central pipe; the centralizing ring comprises a plurality of convex parts and a plurality of concave parts, and the convex parts and the concave parts are alternately arranged around the circumference of the centralizing ring. The utility model discloses a centralizer has solved among the prior art because the centralizer easily takes place wearing and tearing and lead to the whole condemned problem of becoming invalid of centralizer.

Description

Centering guide

Technical Field

The utility model relates to an oil development technical field particularly, relates to a centralizer.

Background

In the coiled tubing dragging jet staged fracturing or infinite well cementation sliding sleeve staged fracturing process, a longer tool string needs to be put into the coiled tubing for operation, a centralizer with the length of about 1-2 meters is usually used for ensuring the tool string to be centered, and the mode of integrally machining or welding a centralizing block is generally used on site at present.

However, according to the specifications of the downhole operation industry, in order to simultaneously ensure the running performance and the centering effect of the tool, centralizers with different outer diameters need to be used in different inner diameters of the shaft casing, so that centralizers with complete specifications need to be prepared to meet the field requirements, and the number of tools and the cost are high; meanwhile, when the centralizer is put in and put out or is abraded in the fracturing construction process, the whole centralizer is failed and scrapped.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a centralizer for solving the problem of prior art that the centralizer is worn and out easily to result in the overall failure of the centralizer.

In order to achieve the above object, the utility model provides a centralizer, include: a central tube; the inner hole of the centering ring is matched with the outer wall of the central tube, the centering ring is sleeved on the central tube, and the centering ring is detachably connected with the central tube; the centering rings are arranged at intervals along the extending direction of the central pipe; the centralizing ring comprises a plurality of convex parts and a plurality of concave parts, and the convex parts and the concave parts are alternately arranged around the circumference of the centralizing ring.

Further, right the ring and be two, two are right the ring and are included first right ring and second and right the ring, and first right ring and second are right the ring and are set up along the extending direction interval of center tube.

Further, the center tube has the backstop step, and the one end that the second righting ring was kept away from to first righting ring is established on the backstop step.

Further, the protruding part is a prism table, and a concave part is formed between every two adjacent prism tables.

Further, the extending direction of the convex portion and the extending direction of the concave portion are both the same as the extending direction of the center pipe.

Further, the centralizer still includes: the fastener is provided with first fastening hole on righting the ring, is provided with the second fastening hole on the center tube, and the fastener is worn to establish in first fastening hole and second fastening hole.

Further, the first fastening hole is provided on the recess.

Further, the fastener is a plurality of, and a plurality of fasteners are arranged around the circumference interval of righting ring.

The utility model discloses a centralizer includes the center tube and rights the ring, rights the hole of ring and the outer wall looks adaptation of center tube, rights the ring cover and establishes on the center tube, rights the ring and is connected with center tube detachably. The centering device is detachably connected with the central pipe, and when the centering ring or the central pipe is worn, only the centering ring or the central pipe can be replaced, so that the problem that the centering device is worn easily to cause the integral failure and scrapping of the centering device is solved; and, when the centralizer of different specifications of needs, can change the ring of rightting of different specifications to satisfy the use under the different work condition, the cost is reduced. And, right the ring and be a plurality of, a plurality of rings of rightting set up along the extending direction interval of center tube, and such setting makes the righting effect of centralizer better. In addition, this ring of righting includes a plurality of bulges and a plurality of depressed parts that circumference set up in turn for the righting of centralizer is effectual, and has improved the life of the ring of righting.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a centralizer according to the invention.

Wherein the figures include the following reference numerals:

10. a central tube; 11. a stopping step; 20. a righting ring; 21. a first centralizing ring; 22. a second centralizing ring; 23. a projection; 24. a recessed portion; 30. a fastener.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The utility model provides a centralizer please refer to fig. 1, include: a central tube 10; the inner hole of the centering ring 20 is matched with the outer wall of the central tube 10, the centering ring 20 is sleeved on the central tube 10, and the centering ring 20 is detachably connected with the central tube 10; the number of the centralizing rings 20 is multiple, and the plurality of centralizing rings 20 are arranged at intervals along the extending direction of the central tube 10; centralizing ring 20 includes a plurality of projections 23 and a plurality of recesses 24, with the plurality of projections 23 and the plurality of recesses 24 alternating about the circumference of centralizing ring 20.

The utility model discloses a centralizer includes center tube 10 and right ring 20, and the hole of right ring 20 and the outer wall looks adaptation of center tube 10 right ring 20's cover and establish on center tube 10, right ring 20 and center tube 10 detachably are connected. The centralizer is detachably connected with the central pipe 10 through the righting ring 20, when the righting ring 20 or the central pipe 10 is abraded, only the righting ring 20 or the central pipe 10 can be replaced, and the problem that the centralizer is damaged due to the fact that the centralizer is easily abraded is solved; and, when the centralizer of different specifications is required, can change the ring 20 of righting of different specifications to satisfy the use under the different operating modes, the cost is reduced. Moreover, the centralizing rings 20 are arranged in a plurality, and the plurality of centralizing rings 20 are arranged at intervals along the extending direction of the central tube 10, so that the centralizing effect of the centralizer is better. In addition, this righting ring 20 includes a plurality of bulges 23 and a plurality of depressed parts 24 that circumference set up in turn for the righting of centralizer is effectual, and has improved the life of righting ring 20.

In one embodiment, as shown in fig. 1, there are two centralizing rings 20, and the two centralizing rings 20 include a first centralizing ring 21 and a second centralizing ring 22, and the first centralizing ring 21 and the second centralizing ring 22 are arranged at intervals along the extending direction of the base pipe 10. On the basis of ensuring the centering effect, the centering device has optimal performance in all aspects.

In a specific implementation, as shown in fig. 1, the central tube 10 has a stopping step 11, and one end of the first centering ring 21 away from the second centering ring 22 abuts against the stopping step 11. Such setting is better to the spacing effect of first righting ring 21, and is convenient for the installation of first righting ring 21.

In specific implementation, the central tube 10 is provided with a positioning hole, a positioning block is inserted into the positioning hole, and the positioning block protrudes out of the outer surface of the central tube 10; when the second centering ring 22 is installed, the positioning block is inserted into the positioning hole, so that one end of the second centering ring 22 abuts against the positioning hole, and the second centering ring 22 is convenient to position and install; after the second centralizing ring 22 is installed, the locating block is removed from the locating hole.

In specific implementation, the positioning holes are blind holes.

During specific implementation, the second centering rings 22 and the positioning holes are multiple, the second centering rings 22 are arranged at intervals along the extending direction of the central tube 10, the positioning holes and the second centering rings 22 are arranged in a one-to-one correspondence manner, and the positioning blocks in the positioning holes are used for positioning the corresponding second centering rings 22.

In the present embodiment, as shown in fig. 1, the centralizing ring 20 includes a plurality of protrusions 23 and a plurality of recesses 24, and the plurality of protrusions 23 and the plurality of recesses 24 are alternately arranged around the circumference of the centralizing ring 20. The arrangement ensures that the centering effect of the centering device is good, and the service life of the centering ring 20 is prolonged.

Preferably, as shown in fig. 1, the protruding portion 23 is a frustum of a prism, and a recessed portion 24 is formed between two adjacent frustums.

Preferably, as shown in fig. 1, the extending direction of the convex portion 23 and the extending direction of the concave portion 24 are both the same as the extending direction of the center tube 10. The arrangement ensures that the centralizer has good flow guiding effect on fluid.

In order to realize the connection between the centering ring 20 and the central tube 10, as shown in fig. 1, the centering device further includes a fastener 30, the centering ring 20 is provided with a first fastening hole, the central tube 10 is provided with a second fastening hole, and the fastener 30 is inserted into the first fastening hole and the second fastening hole. Such an arrangement facilitates removal of the centralizing ring 20.

In a specific implementation, as shown in fig. 1, the first fastening hole is provided in the recess 24.

In particular, as shown in FIG. 1, a plurality of fasteners 30 are spaced circumferentially around centralizing ring 20. A plurality of fasteners 30 are disposed in one-to-one correspondence with the plurality of recesses 24, with each fastener 30 disposed on a respective recess 24.

In one embodiment, as shown in FIG. 1, the recesses 24 and the protrusions 23 are four in number.

Preferably, the fastener is a set screw.

In this embodiment, the central tube 10 is a short section. The outer diameter of the centralizing ring can be selected and assembled according to needs, and the centralizing ring or the short section can be independently replaced when deformed or worn. Compared with an integral centralizer, on one hand, the combined centralizer can be assembled and disassembled, so that the use flexibility is improved; on the other hand, the damaged part is independently replaced, so that the whole tool is prevented from being failed and scrapped, and the tool cost is reduced.

Wherein, the external diameter of the centralizing ring can be selectively assembled according to the internal diameter of the sleeve, and is fixed on the short section through a fastening screw to prevent movement or rotation.

The centralizing rings are sleeved and connected through independent processing, and compared with the whole steel processing, the material processing cost can be reduced.

When the centralizing ring or the short section is damaged, the centralizing ring or the short section can be independently replaced, so that the whole scrapping is avoided, and the maintenance cost of the tool is reduced.

The utility model relates to an oil development technical field for coiled tubing drags and sprays operations such as staged fracturing or infinite well cementation sliding sleeve staged fracturing.

To above problem, the utility model aims at developing a suit formula centralizer increases application range and flexibility, reduces the instrument cost simultaneously.

In order to achieve the above object, the utility model provides a suit formula centralizer includes: righting ring, nipple joint and fastening screw.

Furthermore, the centralizing rings with corresponding outer diameters can be selected according to the inner diameter of the casing pipe for assembly, different well condition requirements can be met only by preparing the centralizing rings with series size specifications, tool storage is reduced, and construction cost is further reduced.

Furthermore, the centralizing ring is fixed on the short section through a fastening screw, so that axial and radial locking is realized, and the centralizing ring is prevented from moving or rotating.

Furthermore, when the centralizer is subjected to diameter shrinkage with the abrasion of the sleeve in the process of being put in and taken out or is eroded and damaged by fracturing sand in the process of fracturing, the failed centralizing ring or short section can be independently replaced, the integral scrapping of the tool is avoided, and the use cost of the tool is reduced.

When the sleeved centralizer of this embodiment is used for work, firstly two centralizing rings of corresponding specifications are selected according to the inner diameter of a casing to be sleeved on the short section, the mounting screws are fixed, then tools are respectively connected to the coiled tubing according to the structural sequence of the tool string, and the tool string is lowered to the designed position to be operated according to the construction requirements. After the operation is finished, the tool string and the centralizer are put forward, the abrasion condition of the centralizer is observed, the outer diameter of the centralizing ring is measured, if the centralizer is damaged or is reduced in diameter, the failed part is detached for replacement, and the follow-up operation is carried out after the requirements on the site are met.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the utility model discloses a centralizer includes center tube 10 and right ring 20, and the hole of right ring 20 and the outer wall looks adaptation of center tube 10 right ring 20's cover and establish on center tube 10, right ring 20 and center tube 10 detachably are connected. The centralizer is detachably connected with the central pipe 10 through the righting ring 20, when the righting ring 20 or the central pipe 10 is abraded, only the righting ring 20 or the central pipe 10 can be replaced, and the problem that the centralizer is damaged due to the fact that the centralizer is easily abraded is solved; and, when the centralizer of different specifications is required, can change the ring 20 of righting of different specifications to satisfy the use under the different operating modes, the cost is reduced. Moreover, the centralizing rings 20 are arranged in a plurality, and the plurality of centralizing rings 20 are arranged at intervals along the extending direction of the central tube 10, so that the centralizing effect of the centralizer is better. In addition, this righting ring 20 includes a plurality of bulges 23 and a plurality of depressed parts 24 that circumference set up in turn for the righting of centralizer is effectual, and has improved the life of righting ring 20.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 (9)

1. A centralizer, comprising:

a central tube (10);

the inner hole of the centering ring (20) is matched with the outer wall of the central pipe (10), the centering ring (20) is sleeved on the central pipe (10), and the centering ring (20) is detachably connected with the central pipe (10);

the number of the centralizing rings (20) is multiple, and the plurality of centralizing rings (20) are arranged at intervals along the extending direction of the central pipe (10);

the centralizing ring (20) comprises a plurality of protrusions (23) and a plurality of recesses (24), and the plurality of protrusions (23) and the plurality of recesses (24) are alternately arranged around the circumference of the centralizing ring (20).

2. The centralizer according to claim 1, characterized in that the two centering rings (20) are provided, the two centering rings (20) comprising a first centering ring (21) and a second centering ring (22), the first centering ring (21) and the second centering ring (22) being arranged at intervals along the extension direction of the central tube (10).

3. The centraliser of claim 2, wherein the base pipe (10) has a stop step (11), the end of the first righting ring (21) remote from the second righting ring (22) resting on the stop step (11).

4. A centraliser according to claim 3, wherein the protrusion (23) is a frustum of a pyramid, between two adjacent frustums the recess (24) is formed.

5. A centraliser according to claim 3, wherein the direction of extension of the protrusions (23) and the direction of extension of the recesses (24) are both the same as the direction of extension of the base pipe (10).

6. The centralizer of claim 3, further comprising:

the centering ring (20) is provided with a first fastening hole, the central pipe (10) is provided with a second fastening hole, and the fastening piece (30) penetrates through the first fastening hole and the second fastening hole.

7. The centralizer according to claim 6, characterized in that the first fastening hole is provided on the recess (24).

8. The centralizer of claim 6, wherein the fasteners (30) are plural, the plural fasteners (30) being spaced circumferentially around the centralizing ring (20).

9. The centralizer of claim 6, wherein the fastener (30) is a set screw.

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