CN218117711U - Righting device - Google Patents

Abstract

The utility model discloses a righting device has solved the unstable technical problem in logging operation in-process logging instrument position. The device comprises a base body which is arranged in a cylindrical shape and is used for being inserted into a shaft; at least one group of roller assemblies which are respectively arranged on the base body; the roller assembly can roll and abut against two positions of the well wall at least, the two abutting positions are symmetrically distributed along the axial lead of the vertical shaft, and one inner radial line passing through the axial lead of the vertical shaft can pass through the two abutting positions at the same time. The utility model discloses can keep the stable in position of logging instrument, reduce the risk that the logging instrument appears rocking to improve and measure the precision.

Description

Righting device

Technical Field

The utility model belongs to the technical field of logging instrument, concretely relates to righting device.

Background

In the logging projects such as cross dipole logging, microresistivity scanning imaging logging (especially horizontal well logging) and the like in the cable logging projects, the instrument needs to be kept at the central axis of a borehole so as to ensure the accuracy of logging parameters.

Most logging instruments realize the instrument through the structure that the spring leaned on the arm between two parties, and the spring arm mainly utilizes the laminating of probe and the wall of a well, realizes rightting to the instrument. However, the spring arm is elastically abutted with the well wall, so that the righting force of the spring arm is relatively small. When the instrument and the spring arm move along the axis direction of the vertical shaft, the spring arm can generate elastic deformation, so that the instrument is driven to shake, and the instrument cannot be stably kept in the central position.

Therefore, the position of the logging instrument is kept stable in the using process of the logging instrument, and the method has important significance on measuring accuracy.

SUMMERY OF THE UTILITY MODEL

In order to solve all or part of the problems, the utility model aims to provide a righting device can reduce the risk that the logging instrument appears rocking to keep the position relatively stable of logging instrument.

The utility model provides a righting device, include:

a base body arranged in a cylindrical shape and used for being inserted into the shaft;

at least one group of roller assemblies which are respectively arranged on the base body;

the roller components can roll and abut against two positions of the well wall at least, the two abutting positions are symmetrically distributed along the axial lead of the vertical shaft, and one inner radial line passing through the axial lead of the vertical shaft can pass through the two abutting positions at the same time.

Optionally, the roller assembly includes an assembly hole, a pin shaft, and a rotating wheel, the assembly hole is opened on the base body and penetrates through the thickness direction of the base body, two end portions of the pin shaft are respectively connected to corresponding inner walls of the assembly hole, and the rotating wheel is sleeved on the pin shaft.

Optionally, the included angle between two adjacent rotating wheels is 45 °.

Optionally, the centralising apparatus further comprises at least one sub connected to a respective end of the base body, the sub being connectable to a logging tool.

Optionally, the righting device further comprises at least one protective cap, which is detachably connected to the joint or to the corresponding end of the base body, and when the protective cap is connected to the joint or the base body, the joint is located inside the protective cap.

Optionally, the protective cap is threadedly connected to the nipple or the base.

Optionally, the protective cap is sealed to the fitting or the base body by at least one sealing ring.

Optionally, a pull ring is fixed on the protective cap.

Optionally, the substrate is made of 0Cr17Ni4Cu4 Nb.

According to the above technical scheme, the utility model provides a righting device has following advantage:

the roller components in the device are in a rigid butt joint with the well wall, so that the righting force of the logging instrument is improved, the risk of shaking of the logging instrument is reduced, the position of the logging instrument is kept stable, the logging instrument can be located in the central axis of a well, and the measuring accuracy is improved. Simultaneously, the rolling wheel components and the wall of a well slip butt reduce the frictional force between the righting device and the wall of a well, can improve the motion ride comfort of righting device and logging instrument, can also alleviate the degree of wear of righting device, effective increase of service life.

Other features and advantages of the present invention will be set forth in the description that follows.

Drawings

The accompanying drawings are included to provide a further understanding of the technical solutions of the present invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the present invention for explaining the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

Fig. 1 is a front view of a centralizer in an embodiment of the present invention;

fig. 2 is a schematic structural view of a centralizer provided with a set of roller assemblies according to an embodiment of the present invention;

fig. 3 is a schematic structural view of the centering device according to an embodiment of the present invention, wherein the centering device is provided with two sets of roller assemblies;

fig. 4 is a cross-sectional view of a centralizer in an embodiment of the invention;

fig. 5 is a top view of the centering device according to the embodiment of the present invention, showing a state where an included angle between two adjacent rotating wheels is 45 °;

fig. 6 is a top view of the centering device according to the embodiment of the present invention, showing a state where an included angle between two adjacent rotating wheels is 90 °;

fig. 7 is an exploded view of a centralizer in an embodiment of the invention;

fig. 8 is an enlarged schematic view of the area a in fig. 4.

Description of reference numerals:

1. a substrate; 2. a roller assembly; 21. an assembly hole; 22. a pin shaft; 23. a rotating wheel; 3. a joint; 4. A protective cap; 5. a seal ring; 6. and (4) a pull ring.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other.

As shown in fig. 1 to 8, the embodiment of the present invention discloses a righting device, which includes a base 1, the base 1 is disposed in a cylinder, and the base 1 is used for being inserted into a shaft. Three groups of roller assemblies 2 are arranged on the base body 1, and the three groups of roller assemblies 2 are uniformly distributed along the axial lead direction of the base body 1.

Any one group of roller assemblies 2 can roll and abut against two positions of the well wall, the two abutting positions are symmetrically distributed along the axial lead of the vertical shaft, and one inner diameter line passing through the axial lead of the vertical shaft can simultaneously pass through the two abutting positions.

In other embodiments, as shown in fig. 2 and 3, the roller assemblies 2 can be one, two or more, and the number is determined according to the actual length and actual condition of the base 1.

The righting device in this embodiment is the rigidity butt form through wheel components 2 and the wall of a well, improves the righting power to logging instrument, reduces logging instrument and appears rocking's risk to keep logging instrument's position stable, make logging instrument can be in the central axis department of well, and then improve and measure the precision.

Moreover, roller components 2 and the wall of a well slip butt reduce the frictional force between the device of righting and the wall of a well, can improve the motion ride comfort of the device of righting and logging instrument, can also alleviate the degree of wear of the device of righting, effective increase of service life.

In one embodiment, as shown in fig. 1 and 4, the scroll wheel assembly 2 includes a mounting hole 21, a pin 22, and a rotating wheel 23, the mounting hole 21 is opened on the base 1, and the mounting hole 21 penetrates through the thickness direction of the base 1. Meanwhile, two end portions of the pin shaft 22 are respectively and fixedly connected to corresponding inner walls of the assembling holes 21, the rotating wheel 23 is sleeved on the pin shaft 22, and the rotating wheel 23 is used for abutting against a well wall.

In one embodiment, as shown in fig. 4 and 5, an included angle between two adjacent rotating wheels 23 is 45 degrees, so that the three rollers can abut against six different positions of the well wall, and the six abutting positions are symmetrically distributed, so that the stress uniformity is improved, and the centering effect is improved.

In other embodiments, as shown in fig. 6, the included angle between two adjacent rotating wheels 23 is 30 °, 60 °, or 90 ° (fig. 6 only shows the state that the included angle between two adjacent rotating wheels 23 is 90 °), which may be determined according to the length of the substrate 1 or the actual situation.

In one embodiment, as shown in fig. 1 and 7, the two end portions of the base body 1 are respectively provided with the joints 3, and the joints 3 are used for the logging instruments to connect, so that a plurality of logging instruments and a plurality of centralizing devices can be connected in series to be used in a string, and the practicability is improved.

In other embodiments, it is also possible that one of the ends of the base body 1 is provided with a joint 3, so that a logging tool can be brought into the shaft together with a centralising apparatus.

In one embodiment, as shown in fig. 1 and 7, each connector 3 is sleeved with a protective cap 4, and the protective cap 4 is detachably connected to the connector 3 to shield the connector 3. In other embodiments, the protective cap 4 may be detachably connected to the base 1, and when the protective cap 4 is connected to the base 1, the joint 3 is located inside the protective cap 4, so as to shield the joint 3. If one joint 3 is provided, one protective cap 4 is correspondingly provided, so that the joint 3 can be shielded and protected.

In one embodiment, as shown in fig. 1 and 7, the protective cap 4 is in threaded connection with the connector 3, in other embodiments, the protective cap 4 may also be in threaded connection with the base 1, and similarly, the protective cap 4 may also be in detachable connection with the connector 3 or the base 1 through clamping, magnetic attraction, or other detachable manners, and only the detachment of the protective cap 4 may be achieved.

In one embodiment, as shown in fig. 7 and 8, two sealing rings 5 are disposed between the protective cap 4 and the joint 3, the two sealing rings 5 are respectively fixedly sleeved on the joint 3 or the base body 1, and when the protective cap 4 is fixedly connected with the joint 3, the sealing rings 5 can seal the protective cap 4 with the joint 3, so as to achieve a sealing effect. In other embodiments, the sealing ring 5 may also be fixedly sleeved on the base 1.

In one embodiment, as shown in fig. 1 and 7, a pull ring 6 is integrally connected to the protective cap 4, so as to facilitate the user to quickly rotate and take the protective cap 4, thereby improving the convenience of operation.

In one embodiment, as shown in fig. 1, the substrate 1 is made of 0Cr17Ni4Cu4Nb, so that the substrate 1 can withstand high temperature and high pressure environment of 175 ℃ and 140 Mpa. In other embodiments, other stainless steel materials or other metal materials can be used for the substrate 1, as long as the substrate can adapt to high-temperature and high-pressure environments.

It should be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (9)

1. A centralizer, comprising:

the base body (1) is arranged in a cylindrical shape and is used for being inserted into a shaft;

at least one group of roller assemblies (2) are arranged on the base body (1) respectively;

the roller assemblies (2) can roll and abut against two positions of the well wall at least, the two abutting positions are symmetrically distributed along the axial lead of the vertical shaft, and one inner diameter line passing through the axial lead of the vertical shaft can pass through the two abutting positions at the same time.

2. The righting device according to claim 1, characterized in that the roller assembly (2) comprises an assembly hole (21), a pin shaft (22) and a rotating wheel (23), the assembly hole (21) is formed in the base body (1) and penetrates through the thickness direction of the base body (1), two end portions of the pin shaft (22) are respectively connected to corresponding inner walls of the assembly hole (21), and the rotating wheel (23) is sleeved on the pin shaft (22).

3. A centralising device according to claim 2, characterised in that the angle between two adjacent turning wheels (23) is 45 °.

4. A centraliser device according to claim 1, characterised in that the centraliser device further comprises at least one joint (3), the joints (3) being connected to respective ends of the base body (1), and the joints (3) being for connection of a logging instrument.

5. The righting device according to claim 4, characterized in that it further comprises at least one protective cap (4), said protective cap (4) being removably connected to the joint (3) or to a corresponding end of the base body (1), and said joint (3) being located inside the protective cap (4) when the protective cap (4) is connected to the joint (3) or to the base body (1).

6. The righting device according to claim 5, characterized in that the protective cap (4) is screwed with the nipple (3) or the base body (1).

7. The righting device according to claim 5, characterized in that the protective cap (4) is sealed with the joint (3) or the base body (1) by means of at least one sealing ring (5).

8. Righting device according to claim 5, characterized in that a pull ring (6) is fixed on the protective cap (4).

9. The centralising apparatus according to claim 1, characterised in that the matrix (1) is made of 0Cr17Ni4Cu4Nb material.

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