A three-arm well diameter potentiometer bellows assisted oil filling device and a method of using the same

Abstract

The application discloses a three-arm well diameter potentiometer bellows auxiliary oiling device and a use method thereof, which comprises a base plate, a baffle and a positioning rod. A slide is arranged on the base plate and extends from the first side of the base plate to the second side. A scale is arranged on the first surface of the base plate and extends from the first side of the base plate to the second side and is located at the side of the slide. The baffle is vertically fixed at the second side end of the base plate. The positioning rod is vertically arranged in the slide, and the end of the positioning rod is at least partially exposed on the first surface of the base plate. The positioning rod is in sliding connection with the slide. The length of the bellows is adjusted by pushing the positioning rod to extrude, and the oiling work is performed without holding the potentiometer all the time. Meanwhile, the length of the bellows is conveniently and accurately adjusted, the oiling speed is effectively increased, and the work efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of auxiliary tools for oil logging equipment, and particularly relates to a three-arm caliper potentiometer bellows auxiliary oiling device and a use method thereof. BACKGROUND

[0002] In order to understand the real state of the oil and gas well after drilling is completed, the well wall diameter of the open hole needs to be measured to assist subsequent operations. Among them, the commonly used instrument for measuring the diameter of the open hole is a three-arm caliper logging instrument. As a commonly used instrument in the field of oil logging, the bellows of the three-arm caliper logging instrument needs to be oiled before each use to ensure that the potentiometer element is in an isolated and insulated state from the well fluid, and the length of the bellows needs to be adjusted according to the bottom hole pressure, so that the internal and external pressures of the bellows can be balanced when the bellows is at a preset depth in the well.

[0003] The existing oiling work is complex and inefficient. Specifically, the oiling nozzle screw needs to be disassembled, then the potentiometer assembly is stood up with the oiling nozzle position upward, and the oiling nozzle is injected with silicone oil using a syringe. This process needs to be operated by holding the instrument throughout the process. After exhausting, the oiling nozzle screw is tightened. Then it is installed on the three-arm caliper instrument with the oiling nozzle upward, the oiling nozzle screw is disassembled, the bellows is squeezed by experience to a suitable length, the excess oil is discharged, and the oiling nozzle screw is tightened again. It can be seen that the existing oiling work is time-consuming, the length of the bellows is not accurate, and the excess oil needs to be discharged, and the operation procedure is complex. SUMMARY

[0004] In view of the technical problems existing in the prior art, the present application provides a three-arm caliper potentiometer bellows auxiliary oiling device and a use method thereof to solve the technical problems of complex operation procedure and low accuracy of adjusting the length of the bellows in the oiling process of the existing three-arm caliper logging instrument.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] The present application provides a three-arm caliper potentiometer bellows auxiliary oiling device, which comprises a base plate, a baffle and a positioning rod. The base plate is provided with a slide, which extends from the first side to the second side of the base plate. The first surface of the base plate is provided with a scale, which extends from the first side to the second side of the base plate and is located at the side of the slide.

[0007] The baffle is vertically fixed at the second end of the base plate.

[0008] The positioning rod is vertically arranged in the slide, and the end of the positioning rod is at least partially exposed on the first surface of the base plate. The positioning rod is in sliding connection with the slide.

[0009] Further, the number of the slide tracks is two, and the two slide tracks are parallel and spaced apart; the number of the positioning rods is two, and the two positioning rods are respectively arranged in the two slide tracks.

[0010] Further, the reference sheet is arranged on the first surface of the substrate and located between the two positioning rods; one end of the reference sheet is fixedly sleeved on one of the positioning rods, and the other end is sleeved on the other positioning rod.

[0011] Further, the zero point of the scale is located at the second side end of the substrate.

[0012] Further, the slide track is a reverse T-shaped groove or a dovetail groove, one end of the positioning rod is provided with a clamping head matched with the reverse T-shaped groove or the dovetail groove, the clamping head is clamped in the reverse T-shaped groove or the dovetail groove in a sliding manner, and the other end of the positioning rod extends out of the first surface of the substrate.

[0013] Further, the slide track penetrates the first surface and the second surface of the substrate, and the two ends of the positioning rod extend out of the two surfaces of the substrate and are fastened on the substrate through nuts.

[0014] Further, the second scale and the second reference sheet are further included;

[0015] The second scale is arranged on the second surface of the substrate; the second scale extends from the first side to the second side of the substrate and is located at the side of the slide track; and the zero point of the second scale is located at the second side end of the substrate.

[0016] The second reference sheet is arranged on the second surface of the substrate and located between the two positioning rods; one end of the second reference sheet is fixedly sleeved on one of the positioning rods, and the other end is sleeved on the other positioning rod.

[0017] Further, the length of the extending end of the positioning rod is the same as the length of the baffle extending out of the two surfaces of the substrate.

[0018] Further, the elastic top holder is arranged in the slide track; one end of the elastic top holder is connected to the baffle in abutment, and the other end is connected to the positioning rod in abutment.

[0019] The application also provides a use method of the three-arm well diameter potentiometer bellows auxiliary oiling device, which comprises the following steps:

[0020] The fixing block of the potentiometer assembly of the three-arm well diameter potentiometer is inserted on the positioning rod;

[0021] The bellow head of the three-arm well diameter potentiometer is abutted against the baffle, the positioning rod is pushed along the slide channel to extrude and adjust the length of the bellow; wherein, the extrusion and adjustment process adjusts the length of the bellow based on the scale on the first surface of the base plate;

[0022] After the air in the bellow and the potentiometer assembly is extracted, oil injection operation is performed.

[0023] Compared with the prior art, the beneficial effects of the present application are:

[0024] The present application provides a three-arm well diameter potentiometer bellow auxiliary oiling device and a use method thereof, which comprises the following steps: a slide channel is arranged on a base plate, a positioning rod is slidably arranged in the slide channel, and the base plate is fixedly connected with a baffle; a fixing block of a potentiometer assembly of the three-arm well diameter potentiometer is fixed by the positioning rod, the head of the bellow is abutted against the baffle, and the length of the bellow is extruded and adjusted by pushing the positioning rod, so that the oiling work is not needed to be performed by holding the potentiometer all the time, the length of the bellow is conveniently and accurately adjusted, the oiling speed is effectively increased, and the work efficiency is improved.

[0025] Further, the slide channel is arranged in parallel to realize the fixation of two insertion holes on the fixing block of the potentiometer assembly of the three-arm well diameter potentiometer, so that the reliable fixation of the three-arm well diameter potentiometer is ensured, and the accuracy of the length adjustment of the bellow is ensured.

[0026] Further, a reference sheet is arranged, and the reference sheet is connected with the positioning rod, so that the numerical value on the scale is conveniently and accurately read.

[0027] Further, the slide channel is arranged in a reverse T-shaped groove or a dovetail groove, and a clamping head matched with the reverse T-shaped groove or the dovetail groove is arranged on the positioning rod, so that the stable connection between the positioning rod and the slide channel is ensured.

[0028] Further, an elastic supporting piece is arranged in the slide channel, and the two ends of the elastic supporting piece are respectively connected with the baffle and the positioning rod in abutment, so that the elastic supporting piece can provide a reset force for the positioning rod, and the reset operation of the positioning rod is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic view of the auxiliary oiling device described in embodiment 1;

[0030] Figure 2 It is a structural schematic view of the auxiliary oiling device described in embodiment 2.

[0031] Wherein, 1 base plate, 2 baffle, 3 positioning rod, 4 reference sheet, 5 elastic supporting piece; 11 slide channel, 12 scale. DETAILED DESCRIPTION

[0032] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thoroughly and completely comprehended, and so that the scope of the present disclosure will be completely conveyed to those skilled in the art.

[0033] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the common meanings understood by those skilled in the art to which the present application pertains.

[0034] The present application provides a three-arm well diameter potentiometer bellows auxiliary oiling device, including base plate 1, baffle 2, positioning rod 3, reference sheet 4 and elastic top holder 5;The base plate 1 is provided with a slide 11, the slide 11 extends from the first side to the second side of the base plate 1;The first surface of the base plate 1 is provided with a scale 12;The scale 12 extends from the first side to the second side of the base plate 1 and is located at the side of the slide 11;Preferably, the zero point of the scale 12 is located at the second side end of the base plate 1;The baffle 2 is vertically fixed at the second side end of the base plate 1;The positioning rod 3 is vertically arranged in the slide 11, and the end of the positioning rod 3 is at least partially exposed on the first surface of the base plate 1;The positioning rod 3 is in sliding connection with the slide 11;The elastic top holder 5 is arranged in the slide 11;One end of the elastic top holder 5 is connected with the baffle and the other end is connected with the positioning rod 3.

[0035] In the present application, the number of slides 11 is two, and the two slides are parallel and spaced apart;The number of positioning rods 3 is two, and the two positioning rods are arranged in the two slides respectively;The reference sheet 4 is slidably arranged on the first surface of the base plate 1 and located between the two positioning rods;One end of the reference sheet 4 is fixedly sleeved on one of the positioning rods, and the other end is sleeved on the other positioning rod.

[0036] In the present application, the slide 11 is a inverted T-shaped groove or a dovetail groove, one end of the positioning rod 3 is provided with a chuck matched with the inverted T-shaped groove or the dovetail groove, the chuck is slidably connected in the inverted T-shaped groove or the dovetail groove, and the other end of the positioning rod 3 extends out of the first surface of the base plate 1.

[0037] The auxiliary oiling device disclosed in the present application further comprises a fixing frame fixedly arranged on the base plate 1 for fixing the vacuum pipe of the vacuum pump.

[0038] Another implementation of the present application is that the slide 11 penetrates the first surface and the second surface of the substrate 1, both ends of the positioning rod 3 protrude from the two surfaces of the substrate 1, and are fastened on the substrate 1 by nuts; preferably, the length of the protruding end of the positioning rod 3 is the same as the length of the baffle 2 protruding from the two surfaces of the substrate 1; the auxiliary oiling device further comprises a second scale and a second reference sheet; the second scale is arranged on the second surface of the substrate 1; the second scale extends from the first side to the second side of the substrate 1 and is located at the side of the slide 11; the zero point of the second scale is located at the second end of the substrate 1; the second reference sheet is slidably arranged on the second surface of the substrate 1 and located between the two positioning rods; one end of the second reference sheet is fixedly sleeved on one of the positioning rods, and the other end is sleeved on the other positioning rod.

[0039] Working principle and use method:

[0040] When the three-arm well diameter potentiometer bellows auxiliary oiling device is used for oiling operation, the specific operation is as follows: the fixed block of the potentiometer assembly of the three-arm well diameter potentiometer is inserted on the positioning rod 3; the head of the bellows of the three-arm well diameter potentiometer is abutted on the baffle 2, and the positioning rod 3 is pushed along the slide 11 to extrude and adjust the length of the bellows; wherein, the extrusion and adjustment process is based on the scale 12 on the first surface of the substrate 1 to adjust the length of the bellows; after the air in the bellows and the potentiometer assembly is exhausted, oiling operation is performed.

[0041] The three-arm well diameter potentiometer bellows auxiliary oiling device and the use method thereof, by arranging the slide on the substrate, slidingly arranging the positioning rod in the slide, and fixedly connecting the substrate and the baffle, fixing the fixed block of the potentiometer assembly of the three-arm well diameter potentiometer by the positioning rod, abutting the head of the bellows on the baffle, and extruding and adjusting the length of the bellows by pushing the positioning rod, the oiling work can be performed without holding the potentiometer all the time, the length of the bellows can be accurately adjusted, the oiling speed is effectively increased, and the work efficiency is improved.

[0042] Embodiment 1

[0043] As shown in the accompanying drawings, Figure 1 Embodiment 1 provides a three-arm well diameter potentiometer bellows auxiliary oiling device, which comprises a substrate 1, a baffle 2, a positioning rod 3 and a reference sheet 4; the substrate 1 is provided with a slide 11 from a first side to a second side, and a scale 12 is arranged on the first surface of the substrate 1 in the direction from the first side to the second side; the baffle 2 is arranged at the end of the second side of the substrate 1; the positioning rod 3 is arranged in the slide 11 and at least partially exposed from the first surface, and the positioning rod 3 is slidably connected with the slide 11.

[0044] In the embodiment 1, the substrate 1 and the baffle 2 are made of metal plates, or the substrate 1 and the baffle 2 can also be made of plastic materials, that is, the substrate 1 and the baffle 2 only need to have a predetermined strength; the substrate 1 and the baffle 2 are preferably rectangular plate bodies, and the thickness and size thereof can not be limited, and the thickness and size thereof can be determined according to the use requirements; the baffle 2 and the substrate 1 can be connected by welding or can be connected by screws.

[0045] In the embodiment 1, the first side and the second side of the substrate 1 are two opposite sides, the slide 11 arranged on the substrate 1 can be a single slide or two parallel slides, the structure of the slide 11 can be a commonly used long groove or a guide rail structure which can cooperate with the positioning rod 3; the scale 12 is arranged parallel to the slide 11; for example, the scale 12 is arranged at a position close to the side edge of the substrate 1, or can be arranged near the slide 11, and the scale 12 is arranged as a millimeter unit scale of international standard units according to the use requirements.

[0046] In the embodiment 1, the positioning rod 3 is preferably a rod body made of metal material, the diameter of the rod body is matched with the through hole on the fixing block of the potentiometer assembly of the three-arm well diameter potentiometer; the connection between the positioning rod 3 and the slide 11 ensures that the positioning rod 3 does not separate from the substrate 1, and ensures that the positioning rod 3 can slide in the slide 11; for example, the positioning rod 3 can be clamped with the slide 11 through a clamping block.

[0047] In the embodiment 1, the slide 11 is two parallel slides with a predetermined distance, and the number of the positioning rods 3 is two; the distance between the two slides needs to be matched with the distance between the two through holes on the fixing block of the potentiometer assembly of the three-arm well diameter potentiometer, so as to ensure that the two positioning rods 3 can be inserted into the two through holes on the fixing block.

[0048] The two ends of the reference sheet 4 are connected with the two positioning rods respectively, the reference sheet 4 slides along the first surface of the substrate 1 with the positioning rod 3, and is used for indicating the value of the scale 12; the zero point of the scale 12 is located at the end of the second side of the substrate 1.

[0049] In the embodiment 1, the function of the reference sheet 4 is similar to that of a pointer, the reference sheet 4 is connected to the two positioning rods 3; after the positioning rod 3 moves, the side edge of the reference sheet 4 corresponds to a certain scale value of the scale 12, which can be used for direct reading and has the effect of facilitating reading; meanwhile, the zero point of the scale 12 is arranged at the end of the second end of the substrate 1, that is, the position of the baffle 2, so that after the bellows of the three-arm well diameter potentiometer is installed on the auxiliary oiling tool provided by the application, the end of the bellows is located at the position of the zero scale 12 line, and the scale 12 value corresponding to the reference sheet 4 is the length of the bellows, so that the reading is further facilitated, and the positioning of the length of the bellows is facilitated.

[0050] In the embodiment 1, the slide 11 is a inverted T-shaped slot or dovetail slot, one end of the positioning rod 3 is provided with a clamping head matched with the slide, the clamping head is clamped in the slide 11 and slides in the slide 11, and the other end of the positioning rod 3 extends out of the first surface of the base plate 1; specifically, in order to prevent the disengagement between the slide 11 and the positioning rod 3, the slide 11 can be set as a inverted T-shaped slot or dovetail slot as described above, and the clamping head is arranged at the first end of the positioning rod 3, the clamping head needs to be matched with the shape of the slide, so that after the clamping head of the positioning rod 3 is matched with the slide 11, the positioning rod 3 can slide in the slide 11 and cannot be separated; wherein the slide 11 is not limited to the inverted T-shaped slot or dovetail slot described above, and can also be other structures capable of achieving sliding clamping by matching with the clamping head.

[0051] The auxiliary oiling device in the embodiment 1 further comprises a fixing frame arranged on the base plate and used for fixing the vacuumizing pipe of the vacuum pump; preferably, the fixing frame can be a Y-shaped or U-shaped support or a pipe clamp with clamping force, as long as it can fix and support the vacuumizing pipe of the vacuum pump.

[0052] Use method:

[0053] The auxiliary oiling device for the three-arm well diameter potentiometer bellows in the embodiment 1 is used by inserting the fixing block of the potentiometer assembly of the three-arm well diameter potentiometer into the positioning rod 3 and abutting the head of the bellows against the baffle 2, and the length of the bellows is adjusted by pushing the positioning rod 3; wherein the length of the bellows can be accurately adjusted based on the scale 12 on the first surface of the base plate 1 according to the linear corresponding relationship between the external environment pressure and the length setting of the bellows.

[0054] Then, the air in the bellows and the potentiometer assembly is extracted by the vacuum pump.

[0055] Finally, the oiling operation is performed.

[0056] In the embodiment 1, the user does not need to hold the potentiometer during the whole oiling process, which is convenient for accurately adjusting the length of the bellows, and the use of the vacuum pump can shorten the air exhausting time, thereby effectively increasing the oiling speed and improving the work efficiency.

[0057] Embodiment 2

[0058] As shown in the accompanying drawings, Figure 2 The auxiliary oiling device for the three-arm well diameter potentiometer bellows in the embodiment 2 has basically the same principle and structure as the auxiliary oiling device for the three-arm well diameter potentiometer bellows in the embodiment 1, and the difference lies in that:

[0059] In this embodiment 2, the structure of the slide 11 matched with the positioning rod 3 is additionally provided with the elastic top holder 5; the elastic top holder 5 is arranged in the slide 11, and the two ends of the elastic top holder 5 are respectively connected with the positioning rod 3 and the baffle 2 for abutting, and the elastic top holder 5 is used for providing the preset reset force for the positioning rod 3.

[0060] Embodiment 3

[0061] The three-arm well diameter potentiometer bellows assisted oiling device provided in this embodiment 3 is basically the same as the three-arm well diameter potentiometer bellows assisted oiling device in the embodiment 1 or the embodiment 2 in principle and structure, and the difference is that:

[0062] In this embodiment 3, the slide 11 penetrates through the first surface and the second surface of the base plate 1, and the two ends of the positioning rod 3 protrude from the two surfaces of the base plate 1 and are fastened on the base plate 1 through nuts; specifically, external threads can be arranged on the positioning rod 3, the positioning rod 3 is inserted into the slide 11 of the base plate 1, and then the base plate 1 is positioned relative to the positioning rod 3 by arranging nuts on the first surface side and the second surface side of the base plate 1 and matched with the positioning rod 3. When the positioning rod 3 is needed to push the bellows to change the length, the nut on one side can be loosened, and after the length of the bellows is adjusted, the positioning rod 3 is positioned by tightening the nut.

[0063] In this embodiment 3, the length of the positioning rod 3 protruding from the two side surfaces of the base plate 1 is the same as the length of the baffle 2 protruding from the two side surfaces of the base plate 1; specifically, by setting the lengths of the baffle and the positioning rod protruding from one side of the base plate to be equal, the end of the positioning rod and the side of the baffle can be used as support to stably place the three-arm well diameter potentiometer bellows assisted oiling tool on the platform or the ground, and further facilitate the use and placement of the three-arm well diameter potentiometer bellows assisted oiling tool.

[0064] The assisted oiling device in this embodiment 3 further comprises a second scale and a second reference sheet; the second scale is arranged on the second surface of the base plate along the direction from the first side to the second side of the base plate, and the zero point of the second scale is located at the end of the second side; the second reference sheet is attached to the second surface of the base plate, and the two ends of the second reference sheet are respectively connected with the two positioning rods for sliding with the positioning rods to indicate the scale value; specifically, by arranging the second scale and the second reference sheet, the three-arm well diameter potentiometer bellows assisted oiling tool can also position the potentiometer assembly and the bellows on the second side of the base plate, and the practicability of the three-arm well diameter potentiometer bellows assisted oiling tool is effectively improved.

[0065] In the above embodiments 1-3, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0066] The three-arm well diameter potentiometer bellows auxiliary oiling device and the use method thereof belong to the technical field of auxiliary tools of oil logging equipment, and the auxiliary oiling device comprises a base plate, a slide is arranged on the base plate from a first side to a second side, and a scale is arranged on a first surface of the base plate in a direction from the first side to the second side; a baffle is arranged at an end of the second side of the base plate; a positioning rod is arranged in the slide and at least partially exposed on the first surface, and the positioning rod is in sliding connection with the slide; when the auxiliary oiling device is used for oiling operation, the user does not need to hold the potentiometer for the whole oiling process, and the length of the bellows can be accurately adjusted, and the exhaust time can be shortened by cooperating with the vacuum pump, so that the oiling speed can be effectively increased and the work efficiency can be improved.

[0067] It can be understood that the related features in the above device can be mutually referred. In addition, "first", "second" and the like in the above embodiments are used to distinguish the embodiments, and do not represent the advantages and disadvantages of the embodiments.

[0068] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the application can be practiced without these specific details. In some examples, well-known structures and techniques are not shown in detail in order not to obscure the understanding of the present specification.

[0069] Similarly, it should be understood that, in order to simplify the present application and help understand one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, various features of the present application are sometimes grouped together in a single embodiment, figure, or description thereof. However, this disclosed device should not be interpreted as reflecting the intention that the claimed application requires more features than those explicitly recited in each claim. More precisely, as reflected by the claims, the inventive aspects are in less than all the features of the previously disclosed single embodiment. Therefore, the claims following the specific embodiments are hereby expressly incorporated into this specific embodiment, wherein each claim itself is a separate embodiment of the present application.

[0070] Those skilled in the art will appreciate that the components of the apparatus in the embodiments can be adapted and arranged in one or more apparatuses other than the embodiments. The components in the embodiments can be combined into a component and, furthermore, can be divided into a plurality of sub-components. All the features disclosed in this specification (including the claims, abstract, and drawings) and all the elements of any apparatus disclosed can be combined in any combination, except to the extent that at least some of such features and / or elements are mutually exclusive. Each feature disclosed in this specification (including the claims, abstract, and drawings) can be replaced by alternative features providing the same, equivalent, or similar functionality unless stated otherwise.

[0071] Furthermore, those skilled in the art will appreciate that different embodiments of the application can be implemented in a different manner than that described herein, and that the combination of features of different embodiments means that they are within the scope of the application and form different embodiments. For example, in the claims below, any one of the claimed embodiments can be used in any combination. The various component embodiments of the application can be implemented in hardware, or in combinations thereof.

[0072] The above embodiments are only one of the implementation manners of the technical solutions of the application, and the scope of the application claimed is not limited to the above embodiments, but also includes any changes, substitutions, and other implementation manners easily thought of by those skilled in the art within the technical scope disclosed by the application.

Claims

1. A three-arm borehole potentiometer bellows-assisted refueling device, characterized in that, It includes a base plate (1), a baffle (2) and a positioning rod (3); a slide (11) is provided on the base plate (1), the slide (11) extends from a first side to a second side of the base plate (1); a scale (12) is provided on a first surface of the base plate (1); the scale (12) extends from the first side to the second side of the base plate (1) and is located on the side of the slide (11); The baffle (2) is vertically fixed to the second side end of the base plate (1); The positioning rod (3) is vertically inserted in the slide rail (11), and at least part of the end of the positioning rod (3) is exposed on the first surface of the substrate (1); the positioning rod (3) is slidably connected to the slide rail (11); The fixing block of the potentiometer assembly of the three-arm well diameter potentiometer is inserted into the positioning rod (3); The bellows head of the three-arm caliper potentiometer is pressed against the baffle (2), and the positioning rod (3) is pushed along the slide (11) to squeeze and adjust the length of the bellows; wherein, during the squeezing and adjustment process, the length of the bellows is adjusted based on the scale (12) on the first surface of the substrate (1). After removing the air from the bellows and the potentiometer assembly, an oil filling operation is performed.

2. The three-arm caliper potentiometer bellows auxiliary refueling device according to claim 1, characterized in that, There are two slides (11), which are parallel and spaced apart; there are two positioning rods (3), which are respectively inserted into the two slides.

3. The three-arm caliper potentiometer bellows auxiliary lubrication device according to claim 2, characterized in that, It also includes a reference piece (4); the reference piece (4) is slidably disposed on the first surface of the substrate (1) and located between two positioning rods; one end of the reference piece (4) is fixedly sleeved on one of the positioning rods and the other end is sleeved on the other positioning rod.

4. The three-arm borehole potentiometer bellows auxiliary lubrication device according to claim 1, characterized in that, The zero point of the scale (12) is located at the second side end of the substrate (1).

5. The three-arm caliper potentiometer bellows auxiliary refueling device according to claim 1, characterized in that, The slide (11) is an inverted T-shaped groove or a dovetail groove. One end of the positioning rod (3) is provided with a locking head that is adapted to the inverted T-shaped groove or dovetail groove. The locking head is slidably engaged in the inverted T-shaped groove or dovetail groove. The other end of the positioning rod (3) extends out of the first surface of the substrate (1).

6. The three-arm caliper potentiometer bellows auxiliary refueling device according to claim 2, characterized in that, The slide (11) passes through the first and second surfaces of the substrate (1), and the two ends of the positioning rod (3) extend out of the two surfaces of the substrate (1) and are fastened to the substrate (1) by nuts.

7. The three-arm caliper potentiometer bellows auxiliary lubrication device according to claim 6, characterized in that, It also includes a second scale and a second reference plate; The second scale is disposed on the second surface of the substrate (1); the second scale extends from the first side of the substrate (1) to the second side and is located on the side of the slide (11); the zero point of the second scale is located at the second side end of the substrate (1); The second reference piece is slidably disposed on the second surface of the substrate (1) and located between two positioning rods; one end of the second reference piece is fixedly sleeved on one of the positioning rods and the other end is sleeved on the other positioning rod.

8. The three-arm borehole potentiometer bellows auxiliary lubrication device according to claim 6, characterized in that, The length of the extended end of the positioning rod (3) is the same as the length of the baffle (2) extending out of the two surfaces of the substrate (1).

9. The three-arm borehole potentiometer bellows auxiliary lubrication device according to claim 1, characterized in that, It also includes an elastic support member (5); the elastic support member (5) is disposed in the slide (11); one end of the elastic support member (5) is abutted and connected to the baffle, and the other end is abutted and connected to the positioning rod (3).

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