CN211856435U

CN211856435U - Shale rock core resistivity measurement device

Info

Publication number: CN211856435U
Application number: CN202020538654.0U
Authority: CN
Inventors: 郭红梅; 李农; 陈骁; 周竹影; 何家欢; 唐志娟
Original assignee: Sichuan Kelite Oil Gas Technology Services Co ltd
Current assignee: Sichuan Kelite Oil Gas Technology Services Co ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-11-03
Anticipated expiration: 2030-04-14

Abstract

The utility model discloses a shale rock core resistivity survey device, including placing the rock core test piece in the box, fixed mounting has first electric telescopic handle in the box, a cushion cap, a heater, a temperature sensor and a controller, and the controller simultaneously with temperature sensor, the heater electricity is connected, install a fixture through the straight plate on first electric telescopic handle's the drive end, and the cavity has been seted up in the straight plate, and the rock core test piece is placed in fixture, fixed mounting has the bearing piece on the cushion cap, the straight-bar, the U-shaped groove has been seted up on the bearing piece, install two electrode slices through a telescopic machanism on the straight-bar, there is one to place the pipe through opening fixed mounting on the box, and place the top that the pipe lies in fixture. Has the advantages that: simple structure, reasonable in design can be fixed firm with the rock core test piece, guarantees the stability of experiment test piece, also can be a invariable value with the temperature control during the experiment, the accuracy that can effectual improvement survey.

Description

Shale rock core resistivity measurement device

Technical Field

The utility model relates to a technical field of rock core resistivity measurement especially relates to a shale rock core resistivity measurement device.

Background

The core resistivity is one of basic parameters of rock physical properties, is mainly used for exploring whether rock stratum contains petroleum and natural gas, and can be used for detecting the oil and gas reserves through the resistivity, so the accuracy is particularly important;

the measurement mode that is widely used at present is that the manual holder of hourglass formula second grade method detects, and this kind of mode exists the centre gripping and is stable firm inadequately, the electrode can't laminate with the rock core stick accuracy problem, and is easily influenced by ambient temperature, causes the resistivity of establishing to have great error, therefore urgent need design a shale rock core resistivity survey device and solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the centre gripping is insecure among the prior art, easily receive the temperature influence, and the shale rock core resistivity survey device that provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a shale rock core resistivity survey device, including placing the rock core test piece in the box, fixed mounting has a first electric telescopic handle in the box, a cushion cap, a heater, a temperature sensor and a controller, and the controller simultaneously with temperature sensor, the heater electricity is connected, a fixture is installed through a straight board on first electric telescopic handle's the drive end, and the cavity has been seted up in the straight board, and the rock core test piece is placed in fixture, fixed mounting has a bearing piece on the cushion cap, a straight-bar, a U-shaped groove has been seted up on the bearing piece, install two electrode slices through a telescopic machanism on the straight-bar, it places the pipe to install one through an opening fixed mounting on the box, and place and have the tube cap on the pipe, and place the top that the pipe is located fixture.

In foretell shale rock core resistivity survey device, fixture includes the second electric telescopic handle of fixed mounting in the straight board cavity, and the one end fixed mounting that first electric telescopic handle was kept away from to second electric telescopic handle has a second rack, and the both ends of second rack all mesh has a second gear, and two second gears all rotate through a bull stick and install on straight board, and the both ends of two bull sticks all are located the outside of straight board, equal fixed mounting has a centre gripping arm on two bull sticks.

In foretell shale rock core resistivity survey device, telescopic machanism includes the motor of fixed mounting in the straight-bar, has a first gear through a dwang fixed mounting on the drive end of motor, and the left and right sides of first gear has all meshed a first rack, and first rack passes through slide mechanism slidable mounting in the straight-bar, and the equal fixed mounting of one end of keeping away from first gear on two first racks has a horizontal pole, and two electrode slices install the one side that is close to each other on two horizontal poles respectively.

In the shale core resistivity measuring device, the inner sides of the two clamping arms are fixedly provided with the sponge blocks, and the sponge blocks are attached to the core test piece.

In the shale core resistivity measuring device, the sliding mechanism comprises a trapezoidal sliding groove formed in the straight rod, a sliding block is fixedly mounted on the first rack, and the sliding block is clamped in the trapezoidal sliding groove.

Compared with the prior art, the utility model discloses the advantage lies in:

1: through setting up fixture, the sponge piece in the fixture can with the inseparable laminating of rock core test piece to through two centre gripping arms with rock core test piece fixed clamp tight make it can not remove when the survey, can effectual improvement survey the degree of accuracy.

2: through setting up telescopic machanism, telescopic machanism can stretch out and draw back and closely laminate two electrode slices and the upper and lower end of rock core test piece, can guarantee that the electrode slice can not take place the skew with the rock core test piece at the during operation, can effectively reduce the error of survey.

3: through setting up temperature sensor and heater, link to each other through the controller between the two, temperature sensor is used for monitoring the temperature variation in the box to reach the heater again with signal conduction to controller, heat up by the heater, can be with the temperature of controlling in the box to a invariable temperature, the temperature of simulation rock core in the rock promptly, can improve the precision of survey.

To sum up, the utility model discloses simple structure, reasonable in design can be fixed firm with the rock core test piece, guarantees the stability of experiment test piece, also can be a constancy value with the temperature control when experimenting, can effectual improvement survey the accuracy.

Drawings

Fig. 1 is a schematic structural diagram of a shale core resistivity measurement apparatus according to the present invention when an inner clamping arm is not clamped tightly;

FIG. 2 is a schematic view of the clamping mechanism of FIG. 1 with the clamping arms clamped;

fig. 3 is a perspective view of the receiving block of fig. 1.

In the figure: the device comprises a box body 1, a first electric telescopic rod 2, a straight plate 3, a second electric telescopic rod 4, a bearing platform 5, a bearing block 6, a clamping arm 7, a rock core test piece 8, a straight rod 9, a first rack 10, a first gear 11, a cross rod 12, an electrode plate 13, a heater 14, a temperature sensor 15, a placing pipe 16, a second gear 17, a second rack 18 and a sponge block 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-3, a shale rock core resistivity survey device, including placing the rock core test piece 8 in box 1, fixed mounting has a first electric telescopic handle 2 in the box 1, a cushion cap 5, a heater 14, a temperature sensor 15 and a controller, install a fixture through a straight plate 3 on the drive end of first electric telescopic handle 2, and set up the cavity in the straight plate 3, and the rock core test piece 8 is placed in fixture, fixed mounting has a bearing block 6 on the cushion cap 5, a straight-bar 9, install two electrode slices 13 through a telescopic machanism on the straight-bar 9, it places pipe 16 to install one through an opening fixed mounting on box 1, and it has the tube cap to place block on the pipe 16, and it is located fixture's top to place pipe 16.

The following points are notable:

1. the controller is simultaneously electrically connected with the temperature sensor 15 and the heater 14, the temperature sensor 15 is used for monitoring the temperature change in the box body 1 and transmitting a signal to the controller, the controller controls the heater 14 to start heating, when the temperature reaches a constant value, the heater 14 stops working, and the temperature in the box body 1 can be controlled to be the constant value, namely the temperature of the rock core in the rock.

2. The first electric telescopic rod 2 can push the clamping mechanism to move, and then the core test piece 8 can be driven to move to the lifting mechanism.

3. The bearing block 6 is provided with a U-shaped groove which can play a role of bearing the core test piece 8 in an initial state and can slide on the U-shaped groove, and the groove depth of the U-shaped groove is set to be that when the core test piece 8 is placed on the U-shaped groove, the core test piece 8 and the central point of the telescopic mechanism are ensured to be positioned on the same horizontal line, so that the two electrode plates 13 can be simultaneously connected with the upper surface and the lower surface of the core test piece 8.

4. The electrode sheet 13 can calculate the resistance R by applying the relationship between the voltage and the current and looking at the ohmmeter, which is prior art and not specifically described herein.

5. The core sample 8 is a standard length sample, that is, the length is set to be the same, but the sectional area is set to be different, that is, the calculation can be performed by the formula ρ ═ RS/L, where ρ is the resistivity, S is the sectional area, R is the resistance value, and L is the length of the wire.

6. Fixture includes second electric telescopic handle 4 of fixed mounting in the 3 cavities of bar, the one end fixed mounting that first electric telescopic handle 2 was kept away from to second electric telescopic handle 4 has a second rack 18, the both ends of second rack 18 all mesh has a second gear 17, and two second gears 17 all rotate through a bull stick and install on bar 3, and the both ends of two bull sticks all are located the outside of bar 3, equal fixed mounting has a centre gripping arm 7 on two bull sticks, fixture can press from both sides tight the fixing with rock core test piece 8, make it can not squint when detecting.

7. The sponge piece 19 is fixedly mounted on the inner sides of the two clamping arms 7, the sponge piece 19 is attached to the rock core test piece 8, the sponge piece 19 can play a role in protecting the rock core test piece 8, friction between the sponge piece and the clamping arms 7 can be increased, and clamping is firmer.

8. Telescopic machanism includes the motor of fixed mounting in straight-bar 9, there is a first gear 11 through a dwang fixed mounting on the drive end of motor, first gear 11's the left and right sides all meshes has a first rack 10, and first rack 10 passes through slide mechanism slidable mounting in straight-bar 9, the equal fixed mounting of one end of keeping away from first gear 11 on two first racks 10 has a horizontal pole 12, and two electrode slices 13 install the one side that is close to each other on two horizontal poles 12 respectively, telescopic machanism can start when rock core test piece 8 removes to between two electrode slices 13, drive electrode slice 13 make it with the inseparable laminating of the upper and lower extreme of rock core test piece 8, can begin the survey of resistivity.

9. The sliding mechanism comprises a trapezoidal sliding groove formed in the straight rod 9, a sliding block is fixedly mounted on the first rack 10 and is also trapezoidal, and the sliding block is clamped in the sliding groove, so that the sliding block and the sliding groove cannot be separated, and the first rack 10 can slide in the straight rod 9.

10. The first electric telescopic rod 2 and the second electric telescopic rod 4 are the same as the electric telescopic rods used in the patent document with the patent number of CN 208414826U; the motor is the same as the "motor" used in patent document No. CN 207891421U.

In the utility model, a constant value of the temperature sensor 15 is set first, the temperature in the box body 1 is controlled to be a constant value by the heater 14, then an operator can put the rock core test piece 8 in the placing pipe 16, the rock core test piece passes through the clamping mechanism to be placed in the U-shaped groove on the bearing block 6, the pipe cover is clamped again, the second electric telescopic rod 4 is opened, the second rack 18 is driven to descend by the contraction of the second electric telescopic rod, the second gear 17 meshed with the second rack rotates, the two clamping arms 7 on the rotating rod can be driven to be close to each other, the rock test piece 8 can be clamped and fixed, the first electric telescopic rod 2 is started again, the rock core test piece 8 is pushed to be between the two electrode plates 13, then the motor is started, the two electrode plates 13 are moved to be attached to the upper end and the lower end of the rock core test piece 8, the resistivity can be measured, the resistance R is, the resistivity of the core sample 8 can be calculated by the resistivity formula ρ ═ RS/L.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A shale rock core resistivity measuring device comprises a rock core test piece (8) placed in a box body (1), and is characterized in that a first electric telescopic rod (2), a bearing platform (5), a heater (14), a temperature sensor (15) and a controller are fixedly installed in the box body (1), the controller is simultaneously electrically connected with the temperature sensor (15) and the heater (14), a clamping mechanism is installed on a driving end of the first electric telescopic rod (2) through a straight plate (3), a cavity is formed in the straight plate (3), the rock core test piece (8) is placed in the clamping mechanism, a bearing block (6) and a straight rod (9) are fixedly installed on the bearing platform (5), a U-shaped groove is formed in the bearing block (6), two electrode plates (13) are installed on the straight rod (9) through a telescopic mechanism, the box body (1) is fixedly provided with a placing pipe (16) through an opening, a pipe cover is clamped on the placing pipe (16), and the placing pipe (16) is positioned above the clamping mechanism.

2. The shale core resistivity measurement device as claimed in claim 1, wherein the clamping mechanism comprises a second electric telescopic rod (4) fixedly installed in a cavity of the straight plate (3), one end of the second electric telescopic rod (4) far away from the first electric telescopic rod (2) is fixedly installed with a second rack (18), two ends of the second rack (18) are respectively engaged with a second gear (17), the two second gears (17) are respectively installed on the straight plate (3) through a rotating rod in a rotating mode, two ends of each rotating rod are respectively located outside the straight plate (3), and a clamping arm (7) is respectively and fixedly installed on the two rotating rods.

3. The shale core resistivity measuring device as claimed in claim 1, wherein the telescoping mechanism comprises a motor fixedly mounted in a straight rod (9), a first gear (11) is fixedly mounted on a driving end of the motor through a rotating rod, first racks (10) are respectively meshed on the left side and the right side of the first gear (11), the first racks (10) are slidably mounted in the straight rod (9) through a sliding mechanism, a cross rod (12) is respectively fixedly mounted at one ends, far away from the first gear (11), of the two first racks (10), and two electrode plates (13) are respectively mounted at one sides, close to each other, of the two cross rods (12).

4. The shale core resistivity measurement device as claimed in claim 2, wherein a sponge block (19) is fixedly mounted on the inner sides of the two clamping arms (7), and the sponge block (19) is attached to the core test piece (8).

5. The shale core resistivity measuring device as claimed in claim 3, wherein the sliding mechanism comprises a trapezoidal sliding groove formed in the straight rod (9), a sliding block is fixedly mounted on the first rack (10), and the sliding block is clamped in the trapezoidal sliding groove.