Hanging logging instrument of balance-free system

Abstract

The utility model relates to a balance-system-free hanging logging instrument which comprises a shell, a motor set, a transmission lead screw and a pushing part, the shell is of a hollow structure with an opening in one end, the interior of the shell extends in the length direction perpendicular to the shell to form a mounting part, the interior of the shell is divided into a closed space and an open space by the mounting part, and the open space communicates with the opening of the shell; the motor set is arranged in the closed space of the shell, the pushing part is arranged in the open space of the shell, the transmission lead screw is rotationally arranged at the mounting part of the shell and is in sealed connection with the mounting part, and one end of the transmission lead screw extends into the closed space to be connected with the motor set to drive the transmission lead screw to rotate in the axial direction. And one end of the push rod extends into the open space, the other end of the push rod extends into the open space to be connected with the push part, the push part is driven to move in the length direction of the shell, the push part is placed in an underground liquid medium, and when the hung logging instrument moves, no matter how the push part moves, the size of the logging instrument is not changed, and the original balance state is kept stable all the time.

Description

Technical Field

[0001] This application relates to the technical field of downhole logging tools, and particularly to a hanging logging tool without a balance system. Background Art

[0002] In oil logging, for instruments with mechanical mechanisms (including but not limited to all types of pushing instruments), due to the influence of the downhole hydraulic environment, a balance system is an essential device.

[0003] All logging tools with a pushing mechanism are bound to design a balance system device. The principle of the balance system device is the principle of "equal input and output", so as to prevent the pushed mechanism from increasing the internal pressure in the wellbore and causing damage to the housing of the hanging logging tool or the pushed mechanism. Utility Model Content

[0004] In view of this, this application proposes a hanging logging tool without a balance system. Regardless of how the pushing components move, the volume of the logging tool remains unchanged and the original balanced state remains stable.

[0005] According to one aspect of this application, there is provided a hanging logging tool without a balance system, including: a housing, a motor set, a transmission lead screw, and pushing components;

[0006] The housing is a hollow structure with one end open, and an installation part extends inside along the direction perpendicular to the opening of the housing. The installation part divides the interior of the housing into a closed space and an open space, and the open space communicates with the opening of the housing;

[0007] The motor set is arranged inside the closed space of the housing;

[0008] The pushing components are arranged inside the open space of the housing;

[0009] The transmission lead screw is rotatably arranged at the position of the installation part of the housing, is hermetically connected to the installation part, extends to the inside of the closed space at one end and is connected to the motor set, driving the transmission lead screw to rotate around the axial direction, and extends to the inside of the open space at the other end and is connected to the pushing components, driving the pushing components to make a reciprocating motion along the length direction of the housing.

[0010] In a possible implementation manner, the installation part is annular, and the internal hollow structure matches the transmission lead screw.

[0011] In a possible implementation manner, it further includes: a sealing ring;

[0012] A sealing ring installation groove is provided at the position where the transmission lead screw is connected to the installation part, and the sealing ring installation groove is arranged around the circumferential direction of the transmission lead screw;

[0013] The sealing ring matches the sealing ring installation groove, and the sealing ring is embedded inside the sealing ring.

[0014] In a possible implementation manner, the pushing component includes: a moving screw sleeve, a pull rod, and an elastic claw;

[0015] The moving screw sleeve is arranged inside the open space of the housing, is threadedly connected to the transmission lead screw, and moves back along the length direction of the housing as the transmission lead screw rotates;

[0016] The pull rod is arranged inside the open space of the housing, and both ends are respectively connected to the moving screw sleeve and the elastic claw, and the pull rod drives the elastic claw to move back as the moving screw sleeve moves back.

[0017] In a possible implementation manner, it further includes: a guide key;

[0018] The guide key is arranged on the inner side wall of the housing, inside the open space, and the guide key is key-connected to the moving screw sleeve groove to limit the movement of the moving screw sleeve.

[0019] In a possible implementation manner, it further includes: a flexible coupling;

[0020] The flexible coupling is arranged inside the closed space of the housing, and is respectively connected to the motor set and the transmission lead screw to drive the transmission lead screw to rotate.

[0021] In a possible implementation manner, the open space of the housing communicates with the outside.

[0022] Beneficial effects of the hanging logging tool with the balance-free system according to the embodiments of the present application: The pusher-type components are placed in the downhole liquid medium. When the hanging logging tool moves, regardless of how the above pusher components move, the volume of the logging tool remains unchanged, and the original balanced state always remains stable. There cannot be any force value. Therefore, even without the action of the balance system, the influence on the housing of the hanging logging tool can be avoided. The hanging logging tool with the balance-free system of the present application solves this problem from the balance principle, greatly simplifies the mechanical structure, shortens the length of the tool, reduces the production cost, and saves a lot of labor costs and time in aspects such as processing and manufacturing, assembly and debugging, and maintenance and repair. Specifically, in the present application, a transmission lead screw that can rotate axially is added inside the housing, and both ends in the length direction extend into the closed space and the open space inside the housing respectively. The motor set inside the closed space drives the transmission lead screw to rotate. The rotating transmission lead screw is threadedly connected to the pusher components. By the rotation of the transmission lead screw, the pusher components are driven to move back and forth relative to the opening direction of the housing. The pusher components located inside the open space of the housing are immersed in the downhole liquid medium, so there will be no change in volume. Thus, even without using the balance system for the hanging logging tool, it can ensure that the internal and external pressures of the housing do not change.

[0023] Other features and aspects of the present application will become clear from the following detailed description of the exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings included in and constituting a part of the specification illustrate the exemplary embodiments, features, and aspects of the present application together with the specification, and are used to explain the principles of the present application.

[0025] Figure 1 Schematic diagram showing the hanging logging tool with the balance-free system according to the embodiments of the present application;

[0026] Figure 2 Schematic diagram showing the closed space of the hanging logging tool with the balance-free system according to the embodiments of the present application;

[0027] Figure 3 Schematic diagram showing the open space of the hanging logging tool with the balance-free system according to the embodiments of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will detail various exemplary embodiments, features, and aspects of the present application with reference to the drawings. The same reference numerals in the drawings denote elements with the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0029] Among them, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0031] The special term "exemplary" herein means "serving as an example, embodiment or illustration". Any embodiment described as "exemplary" here does not have to be construed as superior to or better than other embodiments.

[0032] In addition, for better illustration of the present application, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some instances, methods, means, elements and circuits well-known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0033] Refer to Figure 1 、 Figure 2 and Figure 3, the suspended logging tool of the balance-free system in the embodiment of the present application includes: a housing 100, a motor set 200, a transmission lead screw 300, and a pushing component 400. The housing 100 is a hollow structure with an open end, and an installation part 600 extends along the length direction perpendicular to the housing 100 inside. The installation part 600 divides the interior of the housing 100 into a closed space 120 and an open space 130. The open space 130 communicates with the opening of the housing 100. The motor set 200 is arranged inside the closed space 120 of the housing 100, the pushing component 400 is arranged inside the open space 130 of the housing 100, and the transmission lead screw 300 is rotatably arranged at the position of the installation part 600 of the housing 100, is hermetically connected to the installation part 600, extends to the inside of the closed space 120 at one end and is connected to the motor set 200, driving the transmission lead screw 300 to rotate around the axial direction, and extends to the inside of the open space 130 at the other end and is connected to the pushing component 400, driving the pushing component 400 to reciprocate along the length direction of the housing 100.

[0034] In this embodiment, the pushing component is placed in the downhole liquid medium. When the suspended logging tool moves, no matter how the above-mentioned pushing component 400 moves, the volume of the logging tool remains unchanged, and the original balanced state always remains stable, so there cannot be a force value. Therefore, the influence on the housing 100 of the suspended logging tool can be avoided without the action of the balance system. The suspended logging tool of the balance-free system of the present application solves this problem from the balance principle, greatly simplifies the mechanical structure, shortens the instrument length, reduces the production cost, and saves a lot of labor costs and time in aspects such as processing and manufacturing, assembly and debugging, and maintenance and repair. Specifically, in the present application, a transmission lead screw that can rotate axially is added inside the housing 100, and both ends in the length direction extend to the inside of the closed space 120 and the open space 130 of the housing 100 respectively. The motor set 200 inside the closed space 120 drives the transmission lead screw 300 to rotate. The rotating transmission lead screw 300 is threadedly connected to the pushing component 400. By the rotation of the transmission lead screw 300, the pushing component 400 is driven to move back and forth relative to the opening direction of the housing 100. The pushing component 400 located inside the open space of the housing 100 is immersed in the downhole liquid medium, so there will be no change in volume. Therefore, even without using the balance system for the suspended logging tool, the internal and external pressures of the housing 100 can be ensured not to change.

[0035] In a specific embodiment, the installation part 600 is annular, and the internal hollow structure matches the transmission lead screw 300. The middle annular structure can facilitate the rotation of the transmission lead screw 300 inside the installation part 600.

[0036] In a specific embodiment, the hanging logging tool of the unbalanced system further includes: a sealing ring. A sealing ring installation groove is provided at the position where the transmission lead screw 300 is connected to the installation part 600. The sealing ring installation groove is arranged along the circumferential direction of the transmission lead screw 300, and the sealing ring matches the sealing ring installation groove. The sealing ring is embedded inside the sealing ring. In order to ensure the sealing performance inside the closed space 120 of the housing 100, a sealing ring is provided at the position of the transmission lead screw 300 corresponding to the installation part 600, so that the sealed space of the housing 100 and the open space 130 are separated by the installation part 600, the transmission lead screw 300 and the sealing ring. The inside of the open space 130 is immersed in the downhole liquid medium, while the inside of the sealed space is in a sealed state and cannot enter the downhole liquid medium.

[0037] In a specific embodiment, the pushing component 400 includes: a moving nut 410, a pull rod 420 and an elastic claw 430. The moving nut 410 is arranged inside the open space 130 of the housing 100, is threadedly connected to the transmission lead screw 300, and moves back and forth along the length direction of the housing 100 as the transmission lead screw 300 rotates. The pull rod 420 is arranged inside the open space 130 of the housing 100, and its two ends are respectively connected to the moving nut 410 and the elastic claw, and the pull rod 420 drives the elastic claw 430 to move back and forth as the moving nut 410 moves back and forth.

[0038] In a specific embodiment, the hanging logging tool of the unbalanced system further includes: a guide key 500. The guide key 500 is arranged on the inner side wall of the housing 100, inside the open space, and the guide key 500 is in keyway connection with the moving nut 410. The guide key 500 is arranged on the side wall inside the open space 130 of the housing 100, and the guiding directions of multiple guide keys 500 are the same, which can limit the moving nut 410 from moving along the opening direction of the housing 100 when the transmission lead screw 300 rotates circumferentially through the threaded connection with the transmission lead screw 300.

[0039] Among them, the hanging logging tool of the unbalanced system is in a long strip shape, and the opening direction of the housing 100 is the length direction of the housing 100.

[0040] In a specific embodiment, the hanging logging tool of the unbalanced system further includes: a flexible coupling 110; the flexible coupling 110 is arranged inside the closed space 120 of the housing 100, and is respectively connected to the motor set 200 and the transmission lead screw 300 to drive the transmission lead screw 300 to rotate. By connecting the motor set 200 and the transmission lead screw 300 through a flexible coupling, the power of the motor set 200 can be effectively transmitted to the transmission lead screw 300.

[0041] Among them, it should be noted that the interior of the housing 100 of the present application is divided into two parts, a closed space 120 and an open space 130, by the installation part 600, and the closed space 120 is located inside the housing 100 relative to the open space 130. The closed space 120 is separated from the open space of the chassis through the matching installation part 600 and the transmission lead screw 300. In addition, when the hanging logging tool is placed downhole, the downhole liquid medium will submerge the open space 130 of the housing 100.

[0042] The various embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skilled artisans in the art to understand the embodiments disclosed herein.

Claims

1. A hanging logging tool without a balance system, characterized in that: include: Housing, motor unit, transmission screw and push parts; The shell is a hollow structure with one end open, and a mounting portion extends inside along a direction perpendicular to the opening of the shell, the mounting portion divides the inside of the shell into a closed space and an open space, and the open space is connected to the opening of the shell; The motor group is arranged inside the closed space of the housing; The pushing component is arranged inside the open space of the housing; The transmission screw is rotatably arranged at the mounting position of the shell, and is sealed and connected to the mounting portion. One end extends to the inside of the closed space and is connected to the motor group, driving the transmission screw to rotate in the axial direction, and the other end extends to the inside of the open space and is connected to the pushing component, driving the pushing component to reciprocate along the length direction of the shell.

2. The hanging logging tool of the balance-free system according to claim 1, characterized in that: The mounting portion is annular, and the internal hollow structure matches the transmission screw.

3. The balance-free system hanging logging tool according to claim 2, characterized in that: Also includes: Sealing ring; A sealing ring installation groove is provided at a position where the transmission screw is connected to the installation portion, and the sealing ring installation groove is arranged in a circumferential direction around the transmission screw; The sealing ring matches the sealing ring installation groove, and the sealing ring is embedded in the interior of the sealing ring.

4. The hanging logging tool of the balance-free system according to any one of claims 1 to 3, characterized in that: The pushing parts include: a moving screw sleeve, a pull rod and an elastic claw; The moving screw sleeve is arranged inside the open space of the housing, is threadedly connected to the driving screw, and moves back along the length direction of the housing as the driving screw rotates; The pull rod is arranged inside the open space of the shell, and its two ends are respectively connected with the moving screw sleeve and the elastic claw, and the pull rod drives the elastic claw to move back along with the moving screw sleeve.

5. The hanging logging tool of the balance-free system according to claim 4, characterized in that: Also includes: Guide key; The guide key is arranged on the inner side wall of the shell, located inside the open space, and the guide key is connected with the groove key of the motion screw sleeve to limit the rotation of the motion screw sleeve.

6. The hanging logging tool of the balance-free system according to any one of claims 1 to 3, characterized in that: Also includes: Flexible coupling; The flexible coupling is arranged inside the closed space of the shell, and is respectively connected to the motor group and the transmission screw to drive the transmission screw to rotate.

7. The hanging logging tool of the balance-free system according to claim 1, characterized in that: The open space of the housing communicates with the outside.

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