A rheological testing instrument for detecting drilling fluid

Abstract

The present application discloses a rheological test instrument for detecting drilling fluid, which belongs to the field of drilling fluid flow performance detection. The rheological test instrument for detecting drilling fluid comprises: a base, which is used to fix a first rheological test unit and a second rheological test unit; the first rheological test unit and the second rheological test unit; a transmission pipe, which connects a first transmission block and a second transmission block, the ends of the first arc rod and the second arc rod are subjected to the same air pressure, and then the transmission pipe can transmit the torque received by the first transmission block to the second transmission block; a scale indicating device, which can indicate the rotation angle of the indicating disk.

Description

Technical Field

[0001] The invention relates to the field of rheological property detection of drilling fluid, and in particular to a rheological property testing instrument for detecting drilling fluid. Background Art

[0002] Drilling fluid is the circulating flushing medium used in the hole during the drilling process. Drilling fluid is the blood of drilling, also known as drilling flushing fluid. Drilling fluid can be divided into clean water, mud, clay-free flushing fluid, emulsion, foam and compressed air according to its composition. Clean water is the earliest drilling fluid used. It does not need to be treated and is easy to use. It is suitable for intact rock formations and areas with sufficient water sources. Mud is a widely used drilling fluid, mainly suitable for loose, cracked, easy to collapse and fall off, and unstable rock formations such as swelling and peeling when exposed to water.

[0003] In the prior art, the rheological properties of drilling fluid are mainly detected by a single detection device, which is easily affected by external forces, uneven drilling fluid properties, and other factors, resulting in large detection errors. At the same time, the spring of the detection device will shrink during detection, causing the entire internal rotating drum to shrink, affecting the detection effect. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and disclose a rheological testing instrument for detecting drilling fluid, comprising:

[0005] A base, which is used to fix the first rheological detection unit and the second rheological detection unit;

[0006] A first rheological property detection unit includes a first rotating outer cylinder and a first inner stator located inside the first rotating outer cylinder, wherein a gap is provided between the first inner stator and the first rotating outer cylinder to accommodate drilling fluid; the first inner stator is connected to a first connecting rod, the first connecting rod is connected to an indicator disk, the indicator disk is connected to a first transmission block, the first transmission block is connected to a spring assembly, and the spring assembly can prevent the first transmission block from rotating;

[0007] The second rheological property detection unit includes a second rotating outer cylinder and a second inner stator located inside the second rotating outer cylinder, wherein a gap is provided between the second inner stator and the second rotating outer cylinder to accommodate drilling fluid; the second inner stator is connected to a second connecting rod, and the second connecting rod is connected to a second transmission block;

[0008] A transmission pipe, which connects a first transmission block and a second transmission block, the transmission pipe includes arc-shaped parts at both ends and a straight pipe part in the middle, a transmission channel is provided inside the transmission pipe in the axial direction of the transmission pipe, the first transmission block is connected with a first arc-shaped rod, the shape of the first arc-shaped rod and the transmission channel inside the arc-shaped part match each other so that the first arc-shaped rod can be inserted into the transmission channel and can move in the transmission channel; the second transmission block is connected with a second arc-shaped rod, the shape of the second arc-shaped rod and the transmission inside the arc-shaped part match each other so that the second arc-shaped rod can be inserted into the transmission channel and can move in the transmission channel; the ends of the first arc-shaped rod and the second arc-shaped rod are subjected to the same air pressure, so that the transmission pipe can transmit the torque received by the first transmission block to the second transmission block;

[0009] A scale indicating device, which can indicate the rotation angle of the indicating disk.

[0010] In a preferred embodiment, the spring assembly includes an elastic connecting assembly and a spring. In its axial direction, the elastic connecting assembly can extend when the tensile force exceeds a threshold value. The elastic connecting assembly includes a first elastic connecting rod and a second elastic connecting rod. The second elastic connecting rod is provided with a channel inside. The first elastic connecting rod is inserted into the channel. The channel is connected to a pressure control unit through a connecting hose. The pressure control unit includes a pressure control chamber, which is connected to the connecting hose. A pressure control piston is provided in the pressure control chamber, and the pressure control piston is connected to a load-bearing block.

[0011] In a preferred embodiment, the scale indicating device includes a vertical plate connected to the base and an indicating needle located at the end of the vertical plate.

[0012] In a preferred solution, the first transmission block is connected via a first fixing rod and a first arc-shaped rod, a horizontal cross-section of the first transmission block is circular, and the first arc-shaped rod can rotate around a central axis of the first transmission block.

[0013] In a preferred solution, the second transmission block is connected via a second fixed rod and a second arc-shaped rod, the horizontal cross-section of the second transmission block is circular, and the second arc-shaped rod can rotate around the central axis of the second transmission block.

[0014] In a preferred solution, the two arc-shaped portions of the transmission pipe are respectively concentric with the first transmission block and the second transmission block.

[0015] In a preferred solution, the transmission pipe is fixed on the base via a support frame.

[0016] In a preferred solution, pistons are provided at the ends of the first arc-shaped rod and the second arc-shaped rod, and the pistons are movable in the transmission channel.

[0017] In a preferred solution, the rheological test instrument for detecting drilling fluid further includes a mounting plate, and the top end of the spring assembly is fixed on the mounting plate.

[0018] In a preferred solution, the second transmission block is connected to a third connecting rod, and the third connecting rod is connected to a rotating top seat, and the rotating top seat can fix the third connecting rod, and the rotating top seat does not generate rotational resistance to the third connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of this application;

[0020] Figure 2 It is a structural schematic diagram of the transmission pipe;

[0021] Figure 3 is a structural schematic diagram of a pressure control unit;

[0022] Markings in the figure: 100-base, 200-first rheological property detection unit, 210-first rotating outer cylinder, 220-first inner stator, 230-first connecting rod, 240-indicator plate, 250-first transmission block, 251-first fixed rod, 252-first arc rod, 300-second rheological property detection unit, 310-second rotating outer cylinder, 320-second inner stator, 330-second connecting rod, 340-second transmission block, 341-second fixed rod, 342-second arc shaped rod, 350-third connecting rod, 360-rotating top seat, 400-scale indicating device, 500-spring assembly, 510-elastic connecting assembly, 511-first elastic connecting rod, 512-second elastic connecting rod, 513-channel, 520-spring, 600-transmission pipe fitting, 610-transmission channel, 700-support frame, 800-mounting plate, 810-pressure control unit, 811-pressure control chamber, 812-pressure control piston, 813-load-bearing block, 820-connecting hose. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1As shown, this embodiment discloses a rheological testing instrument for detecting drilling fluid, including a base 100, a first rheological testing unit 200, a second rheological testing unit 300, a transmission pipe 600, and a transmission pipe 600, wherein the base 100 is used to fix the first rheological testing unit 200 and the second rheological testing unit 300;

[0025] Continue as Figure 1 The first rheological property detection unit 200 includes a first rotating outer cylinder 210, a first inner stator 220 located inside the first rotating outer cylinder 210, a gap is provided between the first inner stator 220 and the first rotating outer cylinder 210 to accommodate drilling fluid; the first inner stator 220 is connected to a first connecting rod 230, the first connecting rod 230 is connected to an indicator disk 240, the indicator disk is connected to a first transmission block 250, the first transmission block 250 is connected to a spring assembly 500, and the spring assembly 500 can prevent the rotation of the first transmission block 250. During the detection, the drilling fluid is contained in the gap between the first inner stator 220 and the first rotating outer cylinder 210, and the first rotating outer cylinder 210 is driven to rotate at a uniform speed, and then the first inner stator 220 is rotated under the drive of the drilling fluid, and the indicator disk 240 is further rotated, and the performance index of the rheological property of the drilling fluid is judged by detecting the rotation angle of the indicator disk 240.

[0026] The second rheological property detection unit 300 includes a second rotating outer cylinder 310 and a second inner stator 320 located inside the second rotating outer cylinder 310. A gap is provided between the second inner stator 320 and the second rotating outer cylinder 310 to accommodate drilling fluid. The second inner stator 320 is connected to a second connecting rod 330, and the second connecting rod 330 is connected to a second transmission block 340. The principles of the second rheological property detection unit 300 and the first rheological property detection unit 200 are basically the same, except that it ultimately drives the second transmission block 340 to rotate, and there is no elastic component to apply resistance.

[0027] In a more specific solution, the spring assembly 500 includes an elastic connection assembly 510 and a spring 520. The elastic connection assembly 510 can be stretched in its axial direction when the tensile force exceeds a threshold value. In a more specific solution, as shown in FIG. Figure 3As shown, the elastic connection assembly 510 includes a first elastic connection rod 511 and a second elastic connection rod 512. The second elastic connection rod 512 is provided with a channel 513 inside. The first elastic connection rod 511 is inserted into the channel 513. The channel 513 is connected to a pressure control unit 810 through a connecting hose 820. The pressure control unit 810 includes a pressure control chamber 811. The pressure control chamber 811 is connected to the connecting hose 820. A pressure control piston 812 is provided in the pressure control chamber 811. The pressure control piston 812 is connected to a load-bearing block 813. The pressure control piston 813 is connected to the load-bearing block 813. 12 can move freely up and down in the pressure control chamber 811, so the air pressure in the pressure control chamber 811 can be maintained at a fixed level. Further, the air pressure in the channel 513 can be fixed at a fixed level. Further, when the spring 520 is excessively twisted, the tensile force between the first elastic connecting rod 511 and the second elastic connecting rod 512 can be fixed, and the first elastic connecting rod 511 and the second elastic connecting rod 512 are stretched to compensate for the contraction distance of the rotation of the spring 520, so that the device below can be fixed to improve the detection accuracy.

[0028] like Figure 2 As shown, the transmission pipe 600 connects the first transmission block 250 and the second transmission block 340, and the transmission pipe 600 includes arc-shaped portions at both ends and a straight pipe portion in the middle. The transmission pipe 600 is provided with a transmission channel 610 that penetrates the transmission pipe 600 in the axial direction of the transmission pipe 600. The first transmission block 250 is connected with a first arc-shaped rod 252, and the shape of the first arc-shaped rod 252 matches the transmission channel 610 inside the arc-shaped portion so that the first arc-shaped rod 252 can be inserted into the transmission channel 610. 10 and can move in the transmission channel 610; the second transmission block 340 is connected to the second arc rod 342, the shape of the second arc rod 342 matches the transmission channel 610 inside the arc portion so that the second arc rod 342 can be inserted into the transmission channel 610 and can move in the transmission channel 610; the first arc rod 252 and the second arc rod 342 are subjected to the same air pressure at the ends, so that the transmission pipe 600 can transmit the torque received by the first transmission block 250 to the second transmission block 340;

[0029] The scale indicating device 400 can indicate the rotation angle of the indicating plate 240 , and the scale indicating device 400 includes a vertical plate connected to the base 100 and an indicating needle located at the end of the vertical plate.

[0030] The first transmission block 250 is connected by a first fixed rod 251 and a first arc rod 252. The horizontal cross section of the first transmission block 250 is circular, and the first arc rod 252 can rotate around the central axis of the first transmission block 250. The second transmission block 340 is connected by a second fixed rod 341 and a second arc rod 342. The horizontal cross section of the second transmission block 340 is circular, and the second arc rod 342 can rotate around the central axis of the second transmission block 340. The two arc parts of the transmission pipe are respectively concentric with the first transmission block 250 and the second transmission block 340. The transmission pipe 600 of the present application is fixed on the base 100 through a support frame 700.

[0031] The ends of the first arc rod and the second arc rod 342 are provided with pistons, and the pistons can move in the transmission channel 610. The rheological test instrument for detecting drilling fluid also includes a mounting plate 800, and the top end of the spring assembly 500 is fixed on the mounting plate 800; the second transmission block 340 is connected to the third connecting rod 350, and the third connecting rod 350 is connected to the rotating top seat 360, and the rotating top seat 360 can fix the third connecting rod 350, and the rotating top seat 360 does not generate rotation resistance to the third connecting rod 350.

[0032] The rheological property testing method of drilling fluid in this application is as follows:

[0033] First, the drilling fluid is put into the gap between the first inner stator 220 inside the first rotating outer cylinder 210 and fills the gap, then the first rotating outer cylinder 210 is started to rotate at a constant speed, and the indicator disk 240 is further rotated. Due to the presence of the spring 520, the rotation angle of the indicator disk 240 is proportional to the rheological property (such as viscosity), and the rheological property is calculated based on the rotation angle of the indicator disk 240.

[0034] At the same time, the second rheology detection unit 300 is started, and drilling fluid is put into it for detection. The second transmission block 340 rotates, and the torque applied to the second transmission block 340 is further completely transmitted to the first transmission block 250 through the transmission pipe 600 (the specifications of the two rheology detection units are the same), thereby further superimposing the detection effect of the second rheology detection unit 300 and the detection effect of the first rheology detection unit 200, thereby reducing the large error caused by a single detection device and improving the accuracy of the detection.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rheological testing instrument for detecting drilling fluid, characterized in that: Included are: A base (100) used to fix the first rheological property detection unit (200) and the second rheological property detection unit (300); A first rheological property detection unit (200), comprising a first rotating outer cylinder (210), a first inner stator (220) located inside the first rotating outer cylinder (210), a gap being provided between the first inner stator (220) and the first rotating outer cylinder (210) to accommodate drilling fluid; the first inner stator (220) is connected to a first connecting rod (230), the first connecting rod (230) is connected to an indicating disk (240), the indicating disk (240) is connected to a first transmission block (250), the first transmission block (250) is connected to a spring assembly (500), and the spring assembly (500) is capable of preventing the first transmission block (250) from rotating; The second rheological property detection unit (300) comprises a second rotating outer cylinder (310), a second inner stator (320) located inside the second rotating outer cylinder (310), a gap being provided between the second inner stator (320) and the second rotating outer cylinder (310) to accommodate drilling fluid; the second inner stator (320) is connected to a second connecting rod (330), and the second connecting rod (330) is connected to a second transmission block (340); A transmission pipe (600) is connected to a first transmission block (250) and a second transmission block (340); the transmission pipe (600) comprises arc-shaped portions at both ends and a straight pipe portion in the middle; a transmission channel (610) is provided inside the transmission pipe (600) and penetrates the transmission pipe (600) in the axial direction of the transmission pipe (600); the first transmission block (250) is connected to a first arc-shaped rod (252); the shape of the first arc-shaped rod (252) and the transmission channel (610) inside the arc-shaped portion match each other so that the first arc-shaped rod (252) can be inserted into the transmission channel (610). ) and can move in the transmission channel (610); the second transmission block (340) is connected to a second arc-shaped rod (342), and the shape of the second arc-shaped rod (342) matches the transmission channel (610) inside the arc portion so that the second arc-shaped rod (342) can be inserted into the transmission channel (610) and can move in the transmission channel (610); the ends of the first arc-shaped rod (252) and the second arc-shaped rod (342) are subjected to the same air pressure, so that the transmission pipe (600) can transmit the torque received by the first transmission block (250) to the second transmission block (340); A scale indicating device (400) capable of indicating the rotation angle of the indicating disk (240); The spring assembly (500) comprises an elastic connection assembly (510) and a spring (520). In the axial direction of the elastic connection assembly (510), when the tensile force exceeds a threshold value, the elastic connection assembly (510) can be extended. The elastic connection assembly (510) comprises a first elastic connection rod (511) and a second elastic connection rod (512). A channel (513) is provided inside the second elastic connection rod (512). The first elastic connection rod (511) is inserted into the channel (513). The channel (513) is connected to a pressure control unit (810) via a connecting hose (820). The pressure control unit (810) comprises a pressure control chamber (811). The pressure control chamber (811) is connected to the connecting hose (820). A pressure control piston (812) is provided in the pressure control chamber (811). The pressure control piston (812) is connected to a load-bearing block (813). The pressure control piston (812) can move freely up and down in the pressure control chamber (811).

2. The rheological test instrument for detecting drilling fluid according to claim 1, characterized in that: The scale indicating device (400) comprises a vertical plate connected to the base (100) and an indicating needle located at the end of the vertical plate.

3. The rheological test instrument for detecting drilling fluid according to claim 1, characterized in that: The first transmission block (250) is connected via a first fixing rod (251) and a first arc-shaped rod (252); the horizontal cross section of the first transmission block (250) is circular; and the first arc-shaped rod (252) is capable of rotating around a central axis of the first transmission block (250).

4. The rheological testing instrument for detecting drilling fluid according to claim 3, characterized in that: The second transmission block (340) is connected via a second fixing rod (341) and a second arc-shaped rod (342); the horizontal cross-section of the second transmission block (340) is circular; and the second arc-shaped rod (342) is capable of rotating around a central axis of the second transmission block (340).

5. The rheological testing instrument for detecting drilling fluid according to claim 4, characterized in that: The two arc-shaped portions of the transmission pipe are respectively concentric with the first transmission block (250) and the second transmission block (340).

6. The rheological property testing instrument for detecting drilling fluid according to claim 4, characterized in that: The transmission pipe (600) is fixed on the base (100) via a support frame (700).

7. The rheological testing instrument for detecting drilling fluid according to claim 6, characterized in that: Pistons are provided at the ends of the first arc-shaped rod (252) and the second arc-shaped rod (342), and the pistons are capable of moving in the transmission channel (610).

8. The rheological property testing instrument for detecting drilling fluid according to claim 7, characterized in that: The rheological testing instrument for detecting drilling fluid also includes a mounting plate (800), and the top end of the spring assembly (500) is fixed on the mounting plate (800).

9. The rheological testing instrument for detecting drilling fluid according to claim 8, characterized in that: The second transmission block (340) is connected to a third connecting rod (350), and the third connecting rod (350) is connected to a rotating top seat (360). The rotating top seat (360) is capable of fixing the third connecting rod (350), and the rotating top seat (360) does not generate rotational resistance to the third connecting rod (350).

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