CN117825105A - Drilling fluid intelligent sampling device - Google Patents

Abstract

The present invention discloses an intelligent drilling fluid sampling device, comprising a device body, a circulating sampling component and a drilling fluid constant flow suction system; the drilling fluid constant flow suction system is divided into an automatic sampling control system and a sampling pump; the sampling pump is connected to a controller of the automatic sampling control system to control the switch and flow rate control through the controller; the sampling pump is provided with a sampling tube component extending to the outside of the device body; the sampling device also includes an integrated logging instrument; the integrated logging instrument communicates with the automatic sampling control system. The device of the present invention has the advantages of accurate sampling time, reliable sampling quality, and convenient operation. On the basis of saving a large amount of human resources, it has greatly promoted the development process of automation and real-time logging operations.

Description

Drilling fluid intelligent sampling device

Technical Field

The invention relates to the technical field of oil and gas exploration, and in particular to an intelligent drilling fluid sampling device.

Background technique

During the drilling work, technicians need to collect drilling fluid samples regularly and analyze various data of drilling fluid in order to adjust the drilling method. Due to the complex composition of drilling fluid itself, the real-time sampling requirements are high, the sampling frequency varies greatly with the drilling process, and the quality and quantity of the samples are strictly required. At present, a small number of liquid sampling equipment on the market is only used for clean water or a single pure medium. There is no sampling device suitable for drilling fluid with complex physical and chemical components, and there is no equipment that can meet the requirements of automatic sampling of drilling fluid. Drilling site technicians still rely on manual calculation of the time to collect drilling fluid and manually obtain drilling fluid samples. In the era of rapid development of drilling technology, manual sampling obviously cannot meet the needs of drilling construction technology, especially in the case of fast drilling. The rate of manual sampling is far behind the demand of drilling production rate, which will delay drilling operations; especially in windy, frost, rain and snowy weather, it is easy for sampling personnel to fall and cause sample spillage and personnel injuries. Not only is the quality and quantity of samples difficult to guarantee, but also safety hazards are left behind.

In order to change the backward status of drilling fluid automatic sampling technology, it is an arduous and urgent task to seek a method to solve the backwardness of drilling fluid sampling equipment.

Therefore, based on the above technical problems, technicians in this field urgently need to develop an intelligent drilling fluid sampling device.

Summary of the invention

The purpose of the present invention is to provide an intelligent sampling device for drilling fluid, which uses a pneumatic diaphragm pump as a sampling device and combines an automatic sampling control component and an integrated logging instrument to perform sequential sampling operations of multiple sampling bottles with high control accuracy; and uses a multi-layer filtering component to filter the drilling fluid to ensure the purity of the sampling.

In order to achieve the above object, the present invention provides the following technical solutions:

A drilling fluid intelligent sampling device of the present invention comprises:

A device body, wherein the interior of the device body is a sampling operation space;

A circulating sampling assembly integrated in the sampling operation space of the device body, the circulating sampling assembly having a plurality of sampling bottles arranged in sequence; and

A drilling fluid constant flow suction system integrated inside the device body and located on the upper part of the device body;

The drilling fluid constant flow suction system is divided into:

Automatic sampling control system and sampling pump, wherein the sampling pump is a pneumatic diaphragm pump;

The sampling pump is connected to the controller of the automatic sampling control system so as to control the switch and flow rate through the controller;

The sampling pump is provided with a sampling tube assembly extending to the outside of the device body, and the liquid inlet end of the sampling tube assembly is located in the mud tank, and the liquid inlet end of the sampling tube assembly is provided with a filter assembly, and the drilling fluid in the mud tank is filtered by the filter assembly and then drawn into the device body by the sampling tube assembly of the sampling pump and transported to the corresponding sampling bottles respectively;

The sampling device also includes:

Integrated mud logging instrument;

The integrated logging instrument communicates with the automatic sampling control system.

Furthermore, the device body is configured as a rectangular box structure, and a handle is provided on one side or both sides of the device body;

The bottom of the device body is provided with walking wheels.

Furthermore, a control box is provided at the upper part of the interior of the device body;

An automatic sampling control system is integrated on one side of the control box, and the sampling pump is integrated on the other side through a pump seat;

The control box is provided with a liquid outlet hole, the output end of the sampling pump is connected to the liquid outlet pipe, and the output end of the liquid outlet pipe is close to the upper end of one of the sampling bottles of the circulation sampling assembly;

The control box is provided with a sampling tube hole for passing the sampling tube of the sampling pump, and the bottom of the device body is provided with a sampling tube hole. The sampling tube of the sampling pump passes through the two sampling tube holes in sequence and extends toward the outside of the device body.

Further, the circulating sampling component comprises:

a drive motor disposed at the bottom of the device body; and

A sampling disc connected to the output end of the driving motor, the sampling disc is configured as a disc structure, and a plurality of the sampling bottles are arranged at intervals near the circumference of the sampling disc, and the driving motor drives the sampling disc to rotate to control the sampling bottles to pass directly under the liquid outlet pipe of the sampling pump in sequence;

The front of the device body is provided with a door, and the door can be opened to expose the internal circulation sampling device.

Furthermore, an annular frame is provided in the main body of the device, the sampling disk is located in the inner frame of the annular frame, and the inner diameter of the annular frame is at least 5 mm greater than the outer diameter of the sampling disk;

The annular frame is provided with an infrared sensor near the position facing the liquid outlet pipe. The infrared sensor communicates with the automatic sampling control system. When the infrared sensor detects that there is a sampling bottle in front of it, the automatic sampling control system controls the driving motor to stop working.

Furthermore, 12 sampling bottles are evenly arranged on the sampling plate, and the sampling bottles have a bottle body with a volume of 300 ml;

The sampling time of a single sampling bottle is 0.2s-3276s, with an increment of 0.2s.

Furthermore, the sampling tube is divided into two parts: a steel tube and a hose;

The steel pipe is connected to the liquid inlet end of the sampling pump, and the end of the steel pipe extends from the sampling pipe hole at the bottom of the device body to the outside of the device body, and a pipe joint is installed at the end of the steel pipe;

The hose is connected to the steel pipe through a pipe joint, and the other end of the hose is connected to the filter assembly through a pipe joint.

Furthermore, one end of the steel pipe close to the sampling pump is connected to a branch, and the branch extends to the outside of the device body and is provided with a pipe joint;

The branch line is configured as a backwashing line, and the branch line is connected to an external water pump through a pipe joint to backwash the sampling tube and the filter assembly.

Furthermore, the filtering component comprises:

A filter cartridge, the bottom of which is a perforated plate having a plurality of liquid inlet holes; and

A multi-layer filter screen integrated into the filter cartridge;

The filter screen is divided into:

A double-layer filter screen integrated in the lower part of the filter cartridge, and a single-layer filter screen integrated in the upper part of the filter cartridge;

The filter cartridge is provided with a connecting pipe along its axial direction, and the upper end of the connecting pipe extends to the outside of the filter cartridge and is connected to the hose through a pipe joint;

The space between the double-layer filter screen and the single-layer filter screen is a suction space, and the lower end of the connecting pipe extends into the suction space.

Furthermore, the bottom of the sampling plate and the bottom of the device body are both provided with a plurality of drainage holes, and the excess drilling fluid is discharged from any of the drainage holes.

In the above technical solution, the present invention provides an intelligent drilling fluid sampling device, which has the following beneficial effects:

The intelligent sampling device of the present invention not only improves the structure, but also combines the mutual integration of electronic technology and computer technology, and utilizes the two-way communication mechanism between the remote control software and the integrated logging instrument for control, thereby realizing the start and stop of the sampling device, and a high degree of integration between the command issuing system and the integrated logging instrument, completing the timed and quantitative collection of drilling fluid, and achieving a real-time controllable effect.

The device of the present invention has the advantages of accurate sampling time, reliable sampling quality, convenient operation, etc., and greatly promotes the development of automation and real-time logging operations on the basis of saving a large amount of human resources.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

FIG1 is a schematic diagram of the structure of an intelligent drilling fluid sampling device provided by an embodiment of the present invention;

FIG2 is a schematic structural diagram of a circulating sampling assembly of a drilling fluid intelligent sampling device provided by an embodiment of the present invention;

FIG3 is a schematic structural diagram of a filter assembly of a drilling fluid intelligent sampling device provided by an embodiment of the present invention;

FIG. 4 is a wiring diagram of an electric control box and a sampling device of an intelligent drilling fluid sampling device provided by an embodiment of the present invention.

Description of reference numerals:

1. Device body; 2. Drilling fluid constant flow suction system; 3. Circulation sampling assembly; 4. Integrated logging instrument; 5. Filter assembly; 6. Mud tank;

101. handle;

201, sampling pump; 202, automatic sampling control system; 203, liquid outlet pipe; 204, steel pipe; 205, hose; 206, backwash pipeline;

301, sampling plate; 302, ring frame; 303, sampling bottle; 304, driving motor; 305, infrared sensor;

501, filter cartridge; 502, connecting pipe; 503, double-layer filter screen; 504, single-layer filter screen.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

See Figures 1 to 4;

This embodiment discloses a drilling fluid intelligent sampling device, which includes:

The device body 1, the interior of the device body 1 is a sampling operation space;

A circulating sampling assembly 3 integrated in the sampling operation space of the device body 1, wherein the circulating sampling assembly 3 has a plurality of sampling bottles 303 arranged in sequence; and

A drilling fluid constant flow suction system 2 integrated inside the device body 1 and located on the upper part of the device body 1;

The drilling fluid constant flow suction system 2 is divided into:

Automatic sampling control system 202 and sampling pump 201, the sampling pump 201 is a pneumatic diaphragm pump;

The sampling pump 201 is connected to the controller of the automatic sampling control system 202 so as to control the switch and flow rate control through the controller;

The sampling pump 201 is provided with a sampling tube assembly extending to the outside of the device body 1, and the liquid inlet end of the sampling tube assembly is located in the mud tank 6, and the liquid inlet end of the sampling tube assembly is provided with a filter assembly 5. The drilling fluid in the mud tank 6 is filtered by the filter assembly and then drawn into the device body 1 by the sampling tube assembly of the sampling pump 201 and transported to the corresponding sampling bottles 303 respectively.

The sampling device also includes:

Integrated logging instrument 4;

The integrated logging instrument 4 communicates with the automatic sampling control system 202 .

Specifically, the present embodiment discloses an intelligent sampling device, which is mainly used for intelligent sampling of drilling fluid, and meets the requirements of real-time, accurate and reliable quality. The device of the present embodiment mainly includes a device body 1, and a comprehensive logging instrument 4 that communicates with the control element inside the device body 1; in addition, a circulating sampling component 3 is arranged inside the device of the present embodiment, and the sampling bottle 303 on the sampling disk 301 of the circulating sampling component 3 is driven to pass through the outlet of the liquid outlet of the sampling pump 201 in sequence through the rotation of the sampling disk 301, and single-bottle sampling is performed in sequence, and a program is set in the automatic sampling control system 202 of the device body 1 to deliver the sucked drilling fluid to the corresponding sampling bottle 303 in a timely and quantitative manner. In addition, in order to ensure the quality of the sucked drilling fluid, a filter component 5 is arranged at the liquid inlet end of the sampling pump 201 of the present embodiment, and the particulate matter in the mud is filtered through a multi-layer filter screen to avoid clogging the sampling tube and improve the service life of the sampling pump 201.

The sampling pump 201 of this embodiment adopts a pneumatic diaphragm pump. The diaphragm pump is selected mainly because it has the following advantages: no water filling is required, the maximum suction range is up to 7m, and the maximum head is up to 70m; low shear performance, good passing performance, and can pump particulate and viscous liquids; adjustable function, the head and flow rate can be adjusted by the air source pressure; explosion-proof feature, can be used in flammable and explosive places; can be immersed in the medium to work; can be dry-primed and can run idly; simple structure, few wearing parts, easy installation and maintenance.

Preferably, the device body 1 of this embodiment is configured as a rectangular box structure, and a handle 101 is provided on one side or both sides of the device body 1;

The bottom of the device body 1 is provided with running wheels.

Preferably, a control box is provided at the upper part of the interior of the device body 1 of this embodiment;

An automatic sampling control system 202 is integrated on one side of the control box, and a sampling pump 201 is integrated on the other side through a pump seat;

The control box is provided with a liquid outlet hole, the output end of the sampling pump 201 is connected to the liquid outlet pipe 203, and the output end of the liquid outlet pipe 203 is close to the upper end of one of the sampling bottles 303 of the circulation sampling assembly 3;

The control box is provided with a sampling tube hole for passing the sampling tube of the sampling pump 201 , and the bottom of the device body 1 is provided with a sampling tube hole. The sampling tube of the sampling pump 201 passes through the two sampling tube holes in sequence and extends toward the outside of the device body 1 .

As an extended implementation method, the liquid outlet pipe 203 of this embodiment can be designed as a split structure, that is, the part located inside the device body 1 is the first liquid outlet pipe, wherein the lower end part of the first liquid outlet pipe extends from the liquid outlet pipe hole to the outside of the device body 1, and is provided with a pipe joint, such as a flange, and the liquid outlet pipe 203 also includes a second liquid outlet pipe located outside the device body 1, and the two pipes are connected by a pipe joint, and the design purpose of the second liquid outlet pipe is to select a second liquid outlet pipe of appropriate length according to the specifications of different sampling bottles 303, thereby adjusting the length of the entire liquid outlet pipe 203 to achieve equipment sharing.

Preferably, the circulating sampling assembly 3 of this embodiment includes:

A drive motor 304 disposed at the bottom of the device body 1; and

A sampling disc 301 connected to the output end of the driving motor 304, the sampling disc 301 is configured as a disc structure, and a plurality of sampling bottles 303 are arranged at intervals near the circumference of the sampling disc 301, and the driving motor 304 drives the sampling disc 301 to rotate to control the sampling bottles 303 to pass directly under the liquid outlet pipe 203 of the sampling pump 201 in sequence;

The front of the device body 1 is provided with a door, and the internal circulation sampling assembly 3 can be exposed when the door is opened.

In addition, a ring frame 302 is provided in the device body 1 of this embodiment, and the sampling disk 301 is located in the inner frame of the ring frame 302, and the inner diameter of the ring frame 302 is at least 5 mm greater than the outer diameter of the sampling disk 301;

An infrared sensor 305 is provided near the position of the annular frame 302 facing the liquid outlet pipe 203. The infrared sensor 305 communicates with the automatic sampling control system 202. When the infrared sensor 305 detects that there is a sampling bottle 303 in front of it, the automatic sampling control system 202 controls the driving motor 304 to stop working.

This embodiment further defines the structure of the cyclic sampling assembly 3, which drives the sampling plate 301 to rotate through the driving motor 304, and according to the number of sampling bottles 303 set on the sampling plate 301, the driving motor 304 is set in the program to drive the sampling plate 301 to rotate at an angle each time, for example, 12 sampling bottles 303, when a sampling bottle 303 is sampled, the driving motor 304 is used to drive the sampling plate 301 to rotate 30°, so that the next sampling bottle 303 enters the sampling station. The annular frame 302 of this embodiment is set on the outer ring of the sampling plate 301, in order to further ensure the accuracy of the rotation of the sampling plate 301, so as to cooperate with the controller to realize the control of the driving motor 304, the annular frame 302 of this embodiment integrates an infrared sensor 305, and the infrared sensor 305 is used to detect whether the corresponding sampling bottle 303 has reached the sampling station. When it reaches the sampling station, the controller sends information to control the driving motor 304 to stop.

Preferably, 12 sampling bottles 303 are evenly arranged on the sampling plate 301 of this embodiment, and the sampling bottles 303 have a bottle body with a volume of 300 ml;

The sampling time of sampling bottle 303 is 0.2s-3276s, with an increment of 0.2s.

Preferably, the sampling tube of this embodiment is divided into two parts: a steel tube 204 and a hose 205;

The steel pipe 204 is connected to the liquid inlet end of the sampling pump 201, and the end of the steel pipe 204 extends from the sampling pipe hole at the bottom of the device body 1 to the outside of the device body 1, and a pipe joint is installed at the end of the steel pipe 204;

The hose 205 is connected to the steel pipe 204 through a pipe joint, and the other end of the hose 205 is connected to the filter assembly 5 through a pipe joint.

The sampling tube disclosed in this embodiment is a split structure, which mainly includes a steel pipe 204 located inside the device body 1, and a hose 205 located outside the device body 1; the purpose of designing the detachable and replaceable hose 205 is to be able to adjust and replace the hose 205 according to the position of the mud tank 6, and at the same time, it can also facilitate later maintenance. The cost of the hose 205 is lower than that of the steel pipe 204, and it is easy to purchase and replace, so this design can reduce operating costs.

Preferably, the steel pipe 204 of this embodiment is connected to a branch at one end close to the sampling pump 201, and the branch extends to the outside of the device body 1 and is provided with a pipe joint;

The branch line is configured as a backwash line 206 , and the branch line is connected to an external water pump through a pipe joint to backwash the sampling tube and the filter assembly 5 .

The backwash design can further reduce operating costs and effectively flush out mud impurities in the sampling tube.

In order to improve the sampling quality, this embodiment adopts a multi-layer filter screen structure, specifically:

The filter assembly 5 of this embodiment includes:

A filter cartridge 501, the bottom of which is a perforated plate having a plurality of liquid inlet holes; and

A multi-layer filter integrated into the filter cartridge 501;

Filters are divided into:

A double-layer filter screen 503 integrated in the lower part of the filter cartridge 501, and a single-layer filter screen 504 integrated in the upper part of the filter cartridge 501;

The filter cartridge 501 is provided with a connecting pipe 502 along its axial direction, and the upper end of the connecting pipe 502 extends to the outside of the filter cartridge 501 and is connected to the hose 205 through a pipe joint;

The space between the double-layer filter screen 503 and the single-layer filter screen 504 is a suction space, and the lower end of the connecting pipe 502 extends into the suction space.

Preferably, the sampling plate 301 and the bottom of the device body 1 of this embodiment are both provided with a plurality of drainage holes, and the excess drilling fluid is discharged from any drainage hole.

In the above technical solution, the present invention provides an intelligent drilling fluid sampling device, which has the following beneficial effects:

The intelligent sampling device of the present invention not only improves the structure, but also combines the mutual integration of electronic technology and computer technology, and utilizes the two-way communication mechanism between the remote control software and the integrated logging instrument for control, thereby realizing the start and stop of the sampling device, and a high degree of integration between the command issuing system and the integrated logging instrument, completing the timed and quantitative collection of drilling fluid, and achieving a real-time controllable effect.

The device of the present invention has the advantages of accurate sampling time, reliable sampling quality, convenient operation, etc., and greatly promotes the development of automation and real-time logging operations on the basis of saving a large amount of human resources.

The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that, for those skilled in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims (10)

1. An intelligent sampling device for drilling fluid, characterized in that the sampling device comprises: A device body (1), wherein the interior of the device body (1) is a sampling operation space; A circulating sampling assembly (3) integrated in the sampling operation space of the device body (1), wherein the circulating sampling assembly (3) comprises a plurality of sampling bottles (303) arranged in sequence; and A drilling fluid constant flow suction system (2) integrated inside the device body (1) and located above the device body (1); The drilling fluid constant flow suction system (2) is divided into: An automatic sampling control system (202) and a sampling pump (201), wherein the sampling pump (201) is a pneumatic diaphragm pump; The sampling pump (201) is connected to the controller of the automatic sampling control system (202) so as to control the switch and flow rate through the controller; The sampling pump (201) is provided with a sampling tube assembly extending to the outside of the device body (1), and the liquid inlet end of the sampling tube assembly is located in the mud tank (6), and the liquid inlet end of the sampling tube assembly is provided with a filter assembly (5). The drilling fluid in the mud tank (6) is filtered by the filter assembly (5) and then drawn into the device body (1) by the sampling tube assembly of the sampling pump (201) and transported to the corresponding sampling bottles (303) respectively. The sampling device also includes: Integrated logging instrument (4); The integrated logging instrument (4) communicates with the automatic sampling control system (202). 2. The drilling fluid intelligent sampling device according to claim 1, characterized in that the device body (1) is configured as a rectangular box structure, and a handle (101) is provided on one side or both sides of the device body (1); The bottom of the device body (1) is provided with running wheels. 3. The drilling fluid intelligent sampling device according to claim 1, characterized in that a control box is provided at the upper part of the interior of the device body (1); An automatic sampling control system (202) is integrated on one side of the control box, and a sampling pump (201) is integrated on the other side via a pump seat; The control box is provided with a liquid outlet hole extending therethrough, the output end of the sampling pump (201) is connected to a liquid outlet pipe (203), and the output end of the liquid outlet pipe (203) is close to the upper end of one of the sampling bottles (303) of the circulating sampling assembly (3); The control box is provided with a sampling tube hole for passing the sampling tube of the sampling pump (201), and the bottom of the device body (1) is provided with a sampling tube hole, and the sampling tube of the sampling pump (201) passes through the two sampling tube holes in sequence and extends toward the outside of the device body (1). 4. The drilling fluid intelligent sampling device according to claim 3, characterized in that the circulating sampling component (3) comprises: a driving motor (304) arranged at the bottom of the device body (1); and A sampling disc (301) connected to the output end of the driving motor (304), the sampling disc (301) being configured as a disc structure, and a plurality of the sampling bottles (303) being arranged at intervals in the circumferential direction of the sampling disc (301), the driving motor (304) driving the sampling disc (301) to rotate so as to control the sampling bottles (303) to sequentially pass directly below the liquid outlet pipe (203) of the sampling pump (201); The front of the device body (1) is provided with a door, and the door can be opened to expose the internal circulation sampling component (3). 5. The drilling fluid intelligent sampling device according to claim 4, characterized in that an annular frame (302) is provided inside the device body (1), the sampling plate (301) is located inside the annular frame (302), and the inner diameter of the annular frame (302) is at least 5 mm greater than the outer diameter of the sampling plate (301); The annular frame (302) is provided with an infrared sensor (305) near a position directly opposite to the liquid outlet pipe (203). The infrared sensor (305) communicates with the automatic sampling control system (202). When the infrared sensor (305) detects that there is a sampling bottle (303) directly in front of it, the automatic sampling control system (202) controls the driving motor (304) to stop working. 6. The drilling fluid intelligent sampling device according to claim 5, characterized in that 12 sampling bottles (303) are evenly arranged on the sampling plate (301), and the sampling bottles (303) have a bottle body with a volume of 300 ml; The sampling time of a single bottle of the sampling bottle (303) is 0.2s-3276s, with an increment of 0.2s. 7. The drilling fluid intelligent sampling device according to claim 3, characterized in that the sampling tube is divided into two parts: a steel tube (204) and a hose (205); The steel pipe (204) is connected to the liquid inlet end of the sampling pump (201), and the end of the steel pipe (204) extends from the sampling pipe hole at the bottom of the device body (1) to the outside of the device body (1), and a pipe joint is installed at the end of the steel pipe (204); The hose (205) is connected to the steel pipe (204) via a pipe joint, and the other end of the hose (205) is connected to the filter assembly (5) via a pipe joint. 8. The drilling fluid intelligent sampling device according to claim 7, characterized in that one end of the steel pipe (204) close to the sampling pump (201) is connected to a branch, and the branch extends to the outside of the device body and is provided with a pipe joint; The branch line is configured as a backwashing pipeline (206), and the branch line is connected to an external water pump through a pipe joint to backwash the sampling tube and the filter assembly (5). 9. The drilling fluid intelligent sampling device according to claim 7, characterized in that the filtering component (5) comprises: A filter cartridge (501), wherein the bottom of the filter cartridge (501) is a perforated plate having a plurality of liquid inlet holes; and A multi-layer filter screen integrated into the filter cartridge (501); The filter screen is divided into: A double-layer filter screen (503) integrated in the lower part of the filter cartridge (501), and a single-layer filter screen (504) integrated in the upper part of the filter cartridge (501); The filter cartridge (501) is provided with a connecting pipe (502) along its axial direction, and the upper end of the connecting pipe (502) extends to the outside of the filter cartridge (501) and is connected to the hose (205) via a pipe joint; The space between the double-layer filter screen (503) and the single-layer filter screen (504) is a suction space, and the lower end of the connecting pipe (502) extends into the suction space. 10. The intelligent drilling fluid sampling device according to claim 4, characterized in that the sampling plate (301) and the bottom of the device body (1) are both provided with a plurality of drainage holes, and excess drilling fluid is discharged from any of the drainage holes.