Oilfield drilling testing tool and testing method

Abstract

The invention relates to the technical field of testing tools, and proposes an oilfield drilling testing tool and a testing method. The tool and the testing method can be connected to a conveying pipeline of a matching drilling fluid, so as to realize online detection. The detection has little influence on the normal delivery of the drilling fluid, has good detection repeatability, high detection reliability, more convenient detection operation, and good practicality. The tool comprises a box body and a pipeline structure, wherein the pipeline structure comprises an assembly pipe, the box body is fixedly connected to the assembly pipe, and the interior of the assembly pipe is communicated with the interior of the box body, an axle frame is rotatably connected in the box body, a disc frame is fixedly connected to the axle frame, four fixed pipes are fixedly connected to the disc frame, telescopic pipes are slidably connected to the four fixed pipes, mounting pipes are slidably connected to the four telescopic pipes, composite valve assemblies are installed in the four mounting pipes, four elastic traction members are installed on the axle frame, the four elastic traction members are respectively connected to the four mounting pipes, and a central extension tube and an offset extension tube are fixedly connected to the bottom end of the box body.

Description

Technical Field

[0001] The present invention relates to the technical field of testing tools, and in particular to an oilfield drilling testing tool and a testing method. Background Art

[0002] As is known to all, oilfield drilling test tools are mainly used to perform a series of performance tests on drilling fluids during oilfield drilling, including but not limited to the measurement of viscosity, conductivity and pH value. The tests of these indicators are intended to ensure the safety and effectiveness of drilling operations. An oilfield drilling test tool and test method are auxiliary devices and methods for realizing drilling fluid detection under drilling fluid test conditions.

[0003] After searching, the Chinese patent publication number CN221148413U discloses an oilfield drilling test tool, which is roughly described as comprising a box body, a motor is fixedly connected to the other side of the top of the box body, an arm is fixedly connected to the output end of the motor, a first automatic telescopic rod is fixedly connected to one side of the arm, the output end of the first automatic telescopic rod is fixedly connected to the support arm, and a second automatic telescopic rod is fixedly connected to the top of the support arm. When in use, the liquid is discharged into a filter loss meter to measure the filter loss, and then the third automatic telescopic rod pulls the filter loss meter back to the bottom of the sealing cover, and the fourth automatic telescopic rod is used to push the sealing cover to fit tightly with the filter loss meter, and the filter is pumped by an air pump. Gas is injected into the inside of the loss meter so that the drilling fluid inside the loss meter drips into the liquid accumulation box for collection, and the pH value of the drilling fluid can be measured immediately by pH test paper. The Chinese patent announcement number CN115979894A discloses a drilling fluid viscosity detection device and method, which is roughly described as comprising a fixed seat, a support plate is provided on the top surface of the rear side of the fixed seat, a top seat is provided on the upper end of the support plate, a rotating rod is provided on the top surface of the rear side of the top seat, a pressure rod is provided on the front side of the rotating rod, a funnel is provided on the upper end of the front side of the fixed seat, a filter bucket is provided inside the rear side of the upper end of the funnel, an adjustment plate is provided on the left side of the movable plate, a stopwatch is provided on the upper side of the left end of the fixed seat, a top rod is provided on the front side of the upper end of the fixed seat, and a fixed A placing plate is provided on the upper side of the seat, and a measuring cylinder is provided on the upper side of the front end of the placing plate. When in use, the drilling fluid is first poured into the filter bucket, and then flows into the funnel through the filter bucket until the drilling fluid height reaches the bottom surface of the filter bucket. At this time, the mass of the added drilling fluid is converted according to the sum of the three pressure sensing components, and then the difference between the measured mass value and the reference mass value is displayed on the display module. The operator selects a mass block with the same mass as the difference and puts it into the square groove, then holds the handle and quickly pulls back the connected moving plate. At this time, the sealing plate opens, so that the drilling fluid in the funnel can flow into the measuring cylinder on the lower side. At the same time, the adjusting plate connected to the moving plate will be connected to the button on the stopwatch. The button is pressed and the stopwatch starts timing. At the same time, the unrestricted placement plate will rise under the action of the spring A under the push rod to limit the moving plate. As the drilling fluid in the measuring cylinder increases, the spring A will contract and the placement plate will move down. When the drilling fluid in the measuring cylinder reaches the detected amount, the top surface of the upper end of the placement plate just moves to the bottom surface of the moving plate, so that the moving plate is unrestricted. The moving plate will move forward under the action of the tension spring A, and the transmission plate will contact the outer wall of the funnel and move backward, so that the rack drives the sealing plate connected to the gear to seal the opening of the funnel. The adjusting plate will contact the button on the stopwatch again, so that the button is pressed down, the stopwatch is paused, and the data is recorded.

[0004] Although the above-mentioned existing technical solutions can realize auxiliary detection of drilling fluid, in actual operation, the drilling fluid is usually transported through pipelines, and the above-mentioned two forms of detection and testing are more suitable for sampling and detection of drilling fluid in an open or static state. Therefore, if the above-mentioned technical solution is used to detect the drilling fluid transported in the pipeline, it is first necessary to discharge the drilling fluid in the pipeline for sampling, which makes the detection operation more difficult and less practical. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an oilfield drilling testing tool and a testing method, which can be connected to a drilling fluid delivery pipeline to facilitate online detection of the drilling fluid delivery state. The detection process has little impact on the normal delivery of the drilling fluid, the detection repeatability is good, the detection reliability is also high, the detection operation is more convenient, and the practicality is also good.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an oilfield drilling test tool, comprising a box body and a pipeline structure, wherein the pipeline structure comprises an assembly pipe, the box body is fixedly connected to the assembly pipe, and the interior of the assembly pipe is communicated with the interior of the box body, an axle frame is rotatably connected in the box body, a disc frame is fixedly connected to the axle frame, four fixed pipes are fixedly connected to the disc frame, telescopic pipes are slidably connected to the four fixed pipes, installation pipes are slidably connected to the four telescopic pipes, composite valve assemblies are installed in the four installation pipes, and four elastic traction members are installed on the axle frame The four elastic traction members are respectively connected to the four mounting tubes, the bottom end of the box is fixedly connected with a central protruding tube and an offset protruding tube, the top of the box is provided with three external through holes, the central protruding tube and the offset protruding tube are respectively installed with an electric telescopic rod and a servo motor, the servo motor is used for driving the rotation of the shaft frame, a pushing ring is slidably connected in the box, the pushing ring is connected to the telescopic rod of the electric telescopic rod, the pushing ring is used for auxiliary pushing of the four mounting tubes, the three external through holes are respectively installed with a first detection member, a second detection member and a return pipe, the return pipe is connected with the assembly pipe through a one-way valve.

[0007] Preferably, the first detection member and the second detection member both include a sealing ring and a rotating frame, the two sealing rings are fixedly connected to the box body, the two rotating frames are rotatably connected in the two sealing rings respectively, and the two rotating frames are provided with connecting ports, and detection bottles can be detachably installed in the two connecting ports, and a detector is installed in the detection bottle, and the two detectors are provided with external leads, and auxiliary rotating frames are provided on the two rotating frames.

[0008] Preferably, the two communicating ports are provided with inner thread grooves, the two detection bottles are provided with outer thread grooves at their bottle mouths, and the two inner thread grooves are respectively detachably threadedly connected to the two outer thread grooves.

[0009] Preferably, the four composite valve assemblies each include an outer ring seat, a middle step ring and a step column, the four outer ring seats are respectively fixedly connected in the four mounting tubes, the four middle step rings are respectively slidably connected in the four outer ring seats, the four outer ring seats are each fixedly connected with an outer ring spring, the four outer ring springs are respectively fixedly connected to the four middle step rings, the four step columns are respectively slidably connected in the four middle step rings, the four middle step rings are each fixedly connected with an inner ring spring, and the four inner ring springs are respectively fixedly connected to the four step columns.

[0010] Preferably, the two auxiliary rotating frames are both provided with side grooves, the two side grooves are fixedly connected with round shaft rods, the two round shaft rods are rotatably connected with the first rotating frame, the two first rotating frames are both fixedly connected with access limit springs, the two access limit springs are both fixedly connected with the second rotating frame, the two second rotating frames are both rotatably connected with connecting shafts, and the two connecting shafts are fixedly connected to the box body.

[0011] Preferably, the two detection bottles are both connected with a pump-in quick-connect pipe and an outflow quick-connect pipe, and the two pump-in quick-connect pipes and the two outflow quick-connect pipes are both equipped with solenoid valves.

[0012] Preferably, the four elastic traction members each include an articulated tube and an articulated rod, the four articulated tubes are each articulated to the axle frame, the four articulated rods are respectively slidably connected to the four articulated tubes, the four articulated tubes are each fixedly connected with a tension spring, the four tension springs are respectively fixedly connected to the four articulated rods, and the four articulated rods are respectively articulated to the four mounting tubes.

[0013] Preferably, a transmission shaft and a driving shaft are fixedly connected to the output shaft of the servo motor and the telescopic rod of the electric telescopic rod, respectively, and a driving gear and a driven gear ring are installed on the transmission shaft and the shaft frame, respectively, and the driving gear and the driven gear ring are meshed with each other. A transmission ring frame is rotatably connected to the driving shaft, and the transmission ring frame is slidably connected to the shaft frame. The push ring is rotatably connected to the transmission ring frame, and a liquid port is opened on the push ring, and the inner diameter of the liquid port is smaller than the inner diameter of the mounting tube and larger than the outer diameter of the middle step column.

[0014] Preferably, an installation groove is provided in the box body, a pressure sensor is installed in the installation groove, an auxiliary pressure rod is slidably connected in the installation groove, the auxiliary pressure rod is connected to the push ring through a connecting spring, a sealing pipe section is slidably connected in the assembly tube, an outer ridge tube is fixedly connected outside the assembly tube, an electric push-pull rod is installed at one end of the outer ridge tube, a bridge plate is connected to the push-pull rod of the electric push-pull rod through a sealing rod, the bridge plate is slidably connected in the outer ridge tube, and the bridge plate is fixedly connected to the sealing pipe section, and the front and rear ends of the assembly tube are fixedly connected with installation flanges.

[0015] A method for testing an oilfield drilling test tool comprises the following steps:

[0016] S1. When in use, firstly, the assembly pipe is connected to the conveying pipeline of the drilling fluid so that the drilling fluid can flow through the inside of the assembly pipe, and the control power of the electric telescopic rod and the servo motor is turned on. A computer for information reading and control is installed for the first detection member and the second detection member, and the information detected by the first detection member and the second detection member can be read and recorded by the computer, and the electric telescopic rod and the servo motor are connected to the computer, so as to achieve the purpose of controlling the operation of the electric telescopic rod and the servo motor by the computer;

[0017] S2. When the drilling fluid flows through the conveying pipeline of the drilling fluid, the drilling fluid will pass through the inside of the assembly pipe, and the servo motor will be powered on to realize the rotation drive of the shaft frame, and the rotation of the shaft frame will drive the disc frame to rotate, and the rotation of the disc frame will drive the four fixed pipes to form synchronous rotation. During the rotation of the four fixed pipes, the four telescopic pipes and the four installation pipes will be driven to rotate synchronously. When the four installation pipes rotate sequentially into the area where the push ring cannot form an obstruction, that is, the corresponding installation pipe enters the sampling position, the drilling fluid will form a contact with the composite valve assembly, and under the pressure of the drilling fluid, the composite valve assembly will be linked to open, and finally the drilling fluid will enter the sampling space formed by the fixed pipe, the telescopic pipe and the installation pipe;

[0018] S3. With the staged power-on operation of the servo motor, the positions of the four sampling spaces are changed, so that the four sampling spaces are rotated sequentially through the sampling position and the three external through holes. The four sampling spaces that sequentially pass through the sampling position will form sequential sampling. When the sampling space rotates into the three external through holes, the composite valve assemblies in the installation tubes corresponding to the three sampling spaces will be limited by the push rings, and a contact seal will be formed between the installation tubes and the push rings.

[0019] S4. When the electric telescopic rod is powered on to realize the movement drive of the push ring, the push ring will realize the sliding movement of the four installation tubes relative to the four telescopic tubes, and will also make the four telescopic tubes slide relative to the four fixed tubes, so as to realize the compression of the four sampling spaces. When the sampling space corresponding to the external through hole corresponding to the first detection member is compressed, the sample of the drilling fluid in the sampling space will be pushed into the first detection member for detection. When the sampling space corresponding to the external through hole corresponding to the second detection member is compressed, the sample of the drilling fluid in the sampling space will be pushed into the second detection member for detection. When the sampling space corresponding to the external through hole corresponding to the return pipe is compressed, the sample of the drilling fluid in the sampling space will be pushed into the return pipe. The drilling fluid entering the return pipe will eventually be guided to flow back into the assembly pipe.

[0020] S5. When the electric telescopic rod working control push ring moves and resets in the box, its pushing action on the four mounting tubes becomes invalid. Under the corresponding action of the four elastic traction members, the four mounting tubes respectively slide and reset relative to the four telescopic tubes, and the four telescopic tubes respectively slide and reset relative to the four fixed tubes, so that the four compressed sampling spaces are restored to their original sizes. In this way, the samples entering the first detection member and the samples entering the second detection member are respectively returned to their corresponding sampling spaces, so as to be rotated into the next external through hole for corresponding operations;

[0021] S6. The sample discharged through the reflux pipe will not flow back into the corresponding sampling space under the action of the one-way valve. When the installation pipe corresponding to the sampling space fails to be pushed by the push ring, since the pressure in the sampling space is lower than the pressure outside the sampling space, the movement of the corresponding installation pipe will have a certain hysteresis relative to the movement of the push ring, so that the installation pipe and the push ring are separated from each other, and the shielding effect of the push ring on the installation pipe corresponding to the sampling space fails. The drilling fluid in the box will pass through the composite valve assembly and enter the sampling space to dilute the residual sample in the sampling space. When the installation pipe corresponding to the sampling space rotates and enters the area where the push ring cannot form a shielding area, the push ring compresses and pushes the sampling space again, and the drilling fluid in the sampling space will pass through the composite valve assembly and be discharged. The discharged drilling fluid will be separated from the assembly pipe along with the flow of the drilling fluid.

[0022] S7. When the compression and pushing effect of the push ring on the sampling space fails again, the sampling space is enlarged and reset again under the traction effect of the corresponding elastic traction member, so that the drilling fluid is sampled again. Since the drilling fluid discharged in the previous step has flowed away, it will not affect the sampling of the drilling fluid. With the coordinated operation of the servo motor and the electric telescopic rod, the online sampling and detection of the drilling fluid can be realized.

[0023] Compared with the prior art, the present invention provides an oilfield drilling test tool and a test method, which have the following beneficial effects:

[0024] (1) In the present invention, an access structure matching the drilling fluid delivery pipeline is formed through the design of the pipeline structure, so that the drilling fluid can be sampled while the drilling fluid can pass normally, which is convenient for online detection of the drilling fluid delivery state. The detection process has little impact on the normal delivery of the drilling fluid. After the detection is completed, the drilling fluid can flow back into the drilling fluid delivery pipeline.

[0025] (2) In the present invention, through the design of the first detection component and the design of the second detection component, the drilling fluid is matched to form a corresponding direct detection functional component, so that the detection of the corresponding indicators of the drilling fluid can be achieved while the detection repeatability is good.

[0026] (3) In the present invention, through the design of the composite valve assembly, the sampling space formed by the matching fixed pipe, the telescopic pipe and the installation pipe can form a corresponding inflow or outflow of the drilling fluid sample, thereby facilitating the sampling and discharge of the drilling fluid, making the detection operation more convenient and the practicality better. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0028] Figure 2 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0029] Figure 3 It is a schematic diagram of the three-dimensional structure of the mounting tube, the central outrigger tube and the offset outrigger tube of the present invention;

[0030] Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0031] Figure 5 It is a schematic diagram of the exploded three-dimensional structure of the push ring, the drive shaft and the transmission ring frame of the present invention;

[0032] Figure 6 It is a schematic diagram of a three-dimensional structure of a stepped section of the outer ring seat, the middle step ring and the step column of the present invention;

[0033] Figure 7 It is a schematic diagram of the exploded three-dimensional structure of the step ring, step column and outer ring spring in the present invention;

[0034] Figure 8 It is a schematic diagram of the three-dimensional structure of the shaft frame, the disc frame and the fixed pipe of the present invention;

[0035] Fig. 9 It is a partially cutaway three-dimensional structural schematic diagram of the box body, the assembly pipe and the disc rack of the present invention;

[0036] Fig.10 For the present invention Fig. 9 A schematic diagram of the local enlarged structure at C in the middle;

[0037] Fig.11 It is a schematic diagram of a three-dimensional structure of the present invention viewed from the bottom with a partial cross-section of the whole;

[0038] Fig.12 It is a bottom-up three-dimensional structural schematic diagram of the shaft frame, the mounting tube and the electric telescopic rod of the present invention;

[0039] Fig.13 It is a bottom-up three-dimensional structural schematic diagram of the disc frame, the fixed tube and the driven gear ring of the present invention;

[0040] Fig.14 It is a schematic diagram of the exploded three-dimensional structure of the push ring, the drive shaft and the transmission ring frame of the present invention;

[0041] Fig.15 It is a schematic diagram of the three-dimensional structure of the present invention as a whole when viewed from above;

[0042] Fig.16 It is a partially cutaway three-dimensional structural schematic diagram of the cooperation of the detection bottle, the detection instrument and the external lead wire of the present invention;

[0043] Fig.17 It is a schematic diagram of the exploded three-dimensional structure of the sealing ring, the rotating frame and the first rotating connecting frame of the present invention.

[0044] In the figure: 1, box body; 2, assembly tube; 3, shaft frame; 4, disc frame; 5, fixed tube; 6, telescopic tube; 7, installation tube; 8, center extension tube; 9, offset extension tube; 10, electric telescopic rod; 11, servo motor; 12, push ring; 13, return pipe; 14, sealing ring; 15, rotating frame; 16, connecting port; 17, detection bottle; 18, detector; 19, external lead wire; 20, auxiliary rotating frame; 21, threaded inner groove; 22, threaded outer groove; 23, outer ring seat; 24, middle step ring; 25, step column; 26, outer ring spring; 27, inner ring spring; 28, side groove; 29 , round shaft rod; 30, first rotating frame; 31, access limit spring; 32, second rotating frame; 33, connecting shaft; 34, pump inlet quick pipe; 35, outflow quick pipe; 36, solenoid valve; 37, hinged cylinder; 38, hinged rod; 39, tension spring; 40, transmission shaft; 41, drive shaft; 42, drive gear; 43, driven gear ring; 44, transmission ring frame; 45, liquid port; 46, pressure sensor; 47, auxiliary pressure rod; 48, connecting spring; 49, sealing pipe section; 50, outer ridge cylinder; 51, electric push-pull rod; 52, sealing rod; 53, bridge plate; 54, mounting flange. DETAILED DESCRIPTION

[0045] 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 described embodiments 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.

[0046] For examples, see Figure 1-Figure 17, an oilfield drilling test tool, including a box body 1, and also including a pipeline structure, the pipeline structure includes an assembly pipe 2, the front and rear ends of the assembly pipe 2 are fixedly connected with mounting flanges 54, which facilitate the assembly pipe 2 to form an access installation with a drilling fluid delivery pipeline, the box body 1 is fixedly connected to the assembly pipe 2, and the interior of the assembly pipe 2 is connected to the interior of the box body 1, the box body 1 is rotatably connected with an axis frame 3, the axis frame 3 is fixedly connected with a disc frame 4, the disc frame 4 is fixedly connected with four fixed pipes 5, the four fixed pipes 5 are slidably connected with telescopic pipes 6, the four telescopic pipes 6 are slidably connected with mounting pipes 7, the four mounting pipes 7 are installed with composite valve assemblies, and the four composite valve assemblies include outer ring seats 23, middle step ring 24 and step column 25, four outer ring seats 23 are respectively fixedly connected in four mounting tubes 7, four middle step rings 24 are respectively slidably connected in four outer ring seats 23, four outer ring seats 23 are respectively fixedly connected with outer ring springs 26, four outer ring springs 26 are respectively fixedly connected with four middle step rings 24, four step columns 25 are respectively slidably connected in four middle step rings 24, four middle step rings 24 are respectively fixedly connected with inner ring springs 27, four inner ring springs 27 are respectively fixedly connected with four step columns 25, through the design of the composite valve assembly, the sampling space formed by the matching fixed tube 5, telescopic tube 6 and mounting tube 7 can form the corresponding inflow of drilling fluid samples Or outflow, thereby facilitating the sampling and discharge of drilling fluid, making the detection operation more convenient and practical. Four elastic traction members are installed on the shaft frame 3, and the four elastic traction members are respectively connected to the four mounting tubes 7. The four elastic traction members all include hinged tubes 37 and hinged rods 38. The four hinged tubes 37 are all hinged to the shaft frame 3, and the four hinged rods 38 are respectively slidably connected to the four hinged tubes 37. Tension springs 39 are fixedly connected in the four hinged tubes 37, and the four tension springs 39 are respectively fixedly connected to the four hinged rods 38. The four hinged rods 38 are respectively hinged to the four mounting tubes 7. The bottom end of the box body 1 is fixedly connected with a central protruding tube 8 and an offset protruding tube 9, and the top of the box body 1 is provided with three external passages. The central extension tube 8 and the offset extension tube 9 are respectively equipped with an electric telescopic rod 10 and a servo motor 11. The servo motor 11 is used to drive the rotation of the shaft frame 3. A pushing ring 12 is slidably connected in the box body 1. The pushing ring 12 is connected to the telescopic rod of the electric telescopic rod 10. The pushing ring 12 is used for auxiliary pushing of the four mounting tubes 7. Through the design of the pipeline structure, an access structure matching the drilling fluid delivery pipeline is formed to ensure the normal passage of the drilling fluid while realizing the sampling of the drilling fluid, so as to facilitate the online detection of the drilling fluid under the state of delivery. The normal delivery of the drilling fluid is less affected during the detection process. The drilling fluid after the detection is completed can flow back into the drilling fluid delivery pipeline.

[0047] It should be further explained that a transmission shaft 40 and a drive shaft 41 are fixedly connected to the output shaft of the servo motor 11 and the telescopic rod of the electric telescopic rod 10, respectively. A driving gear 42 and a driven gear ring 43 are installed on the transmission shaft 40 and the shaft frame 3, respectively. The driving gear 42 and the driven gear ring 43 are meshed with each other. A transmission ring frame 44 is rotatably connected to the drive shaft 41. The transmission ring frame 44 is slidably connected to the shaft frame 3, and the push ring 12 is rotatably connected to the transmission ring frame 44, so as to ensure that the servo motor 11 drives the shaft frame 3 to rotate while the electric telescopic rod 10 is driven. The push force point of the movable telescopic rod 10 on the push ring 12 is closer to the axis of the push ring 12, so that the force on the push ring 12 is more uniform, and a liquid through hole 45 is opened on the push ring 12, the inner diameter of the liquid through hole 45 is smaller than the inner diameter of the installation tube 7 and larger than the outer diameter of the middle step column 25. When the installation tube 7 rotates into the position corresponding to the liquid through hole 45, the limiting effect of the push ring 12 on the composite valve assembly fails. Thereafter, when the sampling space is compressed and the drilling fluid in it cannot be discharged, after the internal pressure of the sampling space increases, the pressure in the composite valve assembly increases. The step column 25 will overcome the elastic force of the inner ring spring 27 and move relative to the middle step ring 24, so that a flow space is formed between the step column 25 and the middle step ring 24, so as to promote the drainage of the drilling fluid in the sampling space for subsequent sampling of the sampling space. The first detection member, the second detection member and the return pipe 13 are respectively installed at the three external through holes. The return pipe 13 is connected to the assembly pipe 2 through a one-way valve. The first detection member and the second detection member both include a sealing ring 14 and a rotating frame 15. The two sealing rings 14 are fixedly connected to the box body 1. The two rotating frames 15 are rotatably connected in the two sealing rings 14 respectively. A connecting port 16 is opened on the two rotating frames 15. A detection bottle 17 can be detachably installed in the two connecting ports 16. A detector 18 is installed in the detection bottle 17. Both detectors 18 are provided with external leads 19. Auxiliary rotating frames 20 are provided on the two rotating frames 15. Through the design of the first detection component and the design of the second detection component, the corresponding direct detection functional components are formed with the matching drilling fluid, so that the detection of the corresponding indicators of the drilling fluid can be achieved while the detection repeatability is good.

[0048] It should be further explained that a threaded inner groove 21 is provided in the two connecting ports 16, and a threaded outer groove 22 is provided at the bottle mouth of the two detection bottles 17. The two threaded inner grooves 21 are respectively detachably threadedly connected with the two threaded outer grooves 22, so as to facilitate the relative installation and disassembly of the detection bottle 17 relative to the rotating frame 15, and then facilitate the replacement and maintenance of the detection bottle 17 to adapt to the application of various detectors 18. The two auxiliary rotating frames 20 are provided with side grooves 28, and the two side grooves 28 are fixedly connected with round shafts 29. The two round shafts 29 are rotatably connected with the first rotating frames 30, and the two first rotating frames 30 are fixedly connected with access limit springs 31, and the two access limit springs 31 are fixedly connected with the second rotating frames 32, and the two second rotating frames 32 Both are rotatably connected with a connecting shaft 33, and the two connecting shafts 33 are fixedly connected to the box body 1, and can limit and control the relative angle between the rotating frame 15 and the sealing ring 14, so that when the detection bottle 17 is connected and used, the relative position after the connection is formed with respect to the corresponding external through hole is stable, and when the detection bottle 17 is not connected and used, the relative position after the rotation is formed with respect to the corresponding external through hole is stable. The two detection bottles 17 are connected with a pump-in quick-connect pipe 34 and an outflow quick-connect pipe 35, and the two pump-in quick-connect pipes 34 and the two outflow quick-connect pipes 35 are installed with electromagnetic valves 36, which are connected to the external cleaning pump and the reflux guide pipe respectively by connecting the pump-in quick-connect pipe 34 and the outflow quick-connect pipe 35, and the external cleaning liquid is pumped into the corresponding detection bottle 17 through the cleaning pump. The cleaning operation of the detection bottle 17 can be realized to ensure the detection reliability of the detection bottle 17 when it is used multiple times. An installation groove is arranged in the box body 1, and a pressure sensor 46 is installed in the installation groove. An auxiliary pressure rod 47 is slidably connected in the installation groove. The auxiliary pressure rod 47 is connected to the push ring 12 through a connecting spring 48. A sealing pipe section 49 is slidably connected in the assembly tube 2. An outer ridge tube 50 is fixedly connected outside the assembly tube 2. An electric push-pull rod 51 is installed at one end of the outer ridge tube 50. A bridging plate 53 is connected to the push-pull rod of the electric push-pull rod 51 through a sealing rod 52. The bridging plate 53 is slidably connected in the outer ridge tube 50, and the bridging plate 53 is fixedly connected to the sealing pipe section 49, which can form an isolation for the connection between the box body 1 and the assembly tube 2. When the pipeline structure is only used for drilling When the liquid is transported without sampling and testing, the push ring 12 pushes the installation tube 7 to realize the linkage of the telescopic tube 6, so that the push ring 12, the installation tube 7 and the telescopic tube 6 are all moved out of the assembly tube 2 and into the box body 1, that is, the push ring 12 pushes the auxiliary pressure rod 47 through the connecting spring 48 to form a pressure effect on the pressure sensor 46, and the reading of the pressure sensor 46 enters the corresponding range value of the push ring 12 moving out of the assembly tube 2 and entering the box body 1, and the electric push-pull rod 51 is operated to realize the corresponding push adjustment of the sealing pipe section 49. When the sealing pipe section 49 isolates the connection between the box body 1 and the assembly tube 2, it can form a closed protection for the fixed tube 5, the telescopic tube 6 and the installation tube 7, etc., to reduce the influence of the flow of drilling fluid in the assembly tube 2 on them.In order to improve the service life of the equipment as a whole and reduce the resistance of the drilling fluid circulation, the sealing pipe section 49 will keep covering the connection between the outer ridge tube 50 and the assembly pipe 2 during the entire movement process in the assembly pipe 2 to ensure the sealing effect inside and outside the assembly pipe 2.

[0049] The solenoid valve 36, the one-way valve, the servo motor 11, the electric telescopic rod 10, the pressure sensor 46, the detector 18 and the electric push-pull rod 51 in this embodiment are all conventional devices purchased on the market and known to those skilled in the art. In the present invention, we only use them without improving their structures and functions. For those skilled in the art, their setting methods, installation methods and electrical connection methods only need to be debugged and operated according to the requirements of their instruction manuals, and they will not be described in detail here.

[0050] In summary, the working principle of the oilfield drilling test tool and the test method is as follows: first, the assembly pipe 2 is connected to the delivery pipeline of the drilling fluid so that the drilling fluid can flow through the inside of the assembly pipe 2, and the pump-in quick-connect pipe 34 and the outflow quick-connect pipe 35 are respectively connected to the external cleaning pump and the reflux guide pipe, and the cleaning pump, the solenoid valve 36, the one-way valve, the servo motor 11, the electric telescopic rod 10, the pressure sensor 46, the detector 18 and the electric push-pull rod 51 are formed, and the external lead 1 on the detector 18 in the first detection member and the second detection member is connected. 9 is connected to a computer for information reading and control, and the computer can realize the reading and recording of the information detected by the detector 18 in the first detection member and the detector 18 in the second detection member, and the cleaning pump, the solenoid valve 36, the one-way valve, the servo motor 11, the electric telescopic rod 10, the pressure sensor 46, the detector 18 and the electric push-pull rod 51 are all connected to the computer, so that the cleaning pump, the solenoid valve 36, the one-way valve, the servo motor 11, the electric telescopic rod 10, the pressure sensor 46, the detector 18 and the electric push-pull rod 51 are controlled by the computer. For the purpose of the control, when the drilling fluid flows through the conveying pipeline of the drilling fluid, the drilling fluid will pass through the inside of the assembly pipe 2, and through the meshing transmission effect of the driving gear 42 and the driven gear ring 43, the servo motor 11 is powered on to realize the rotation drive of the shaft frame 3, and the rotation of the shaft frame 3 will drive the disc frame 4 to rotate, and the rotation of the disc frame 4 will drive the four fixed pipes 5 to form synchronous rotation, and the rotation of the four fixed pipes 5 will drive the four telescopic pipes 6 and the four installation pipes 7 to rotate synchronously, and when the four installation pipes 7 rotate sequentially into the area where the push ring 12 cannot form a shielding, that is, the corresponding The mounting tube 7 enters the sampling position. At this time, the middle step ring 24 and the step column 25 in the composite valve assembly will be exposed at the liquid passage 45. The drilling fluid will contact the composite valve assembly and cause the composite valve assembly to open in linkage under the pressure of the drilling fluid. That is, the middle step ring 24 overcomes the outer ring spring 26 to move relative to the outer ring seat 23, thereby forming a through channel between the middle step ring 24 and the outer ring seat 23. The drilling fluid enters the corresponding mounting tube 7 through the through channel, and finally reaches the sampling space formed by the fixed tube 5, the telescopic tube 6 and the mounting tube 7.

[0051] Furthermore, along with the staged power-on operation of the servo motor 11, the position change of the four sampling spaces is realized, so that the four sampling spaces are rotated in sequence through the sampling position and the three external through holes, and the four sampling spaces that pass through the sampling position in sequence will form sequential sampling. When the sampling space rotates into the three external through holes, the composite valve assemblies in the mounting tubes 7 corresponding to the three sampling spaces will be limited by the push ring 12, so that the step column 25 in the composite valve assembly cannot slide outward relative to the middle step ring 24, and the mounting tube 7 and the push ring 12 are spaced apart. In this state, when the electric telescopic rod 10 is powered on to realize the movement drive of the push ring 12, the push ring 12 will realize the sliding movement of the four mounting tubes 7 relative to the four telescopic tubes 6, and will also make the four telescopic tubes 6 slide relative to the four fixed tubes 5, so as to realize the compression of the four sampling spaces. When the sampling space corresponding to the external through hole corresponding to the first detection member is compressed, the sample of the drilling fluid in the sampling space is pushed into the detection bottle 17 in the first detection member to form a detection, and the external through hole corresponding to the second detection member is compressed. When the sampling space corresponding to the hole is compressed, the drilling fluid sample in the sampling space is pushed into the detection bottle 17 in the second detection member to form a detection. When the sampling space corresponding to the outer through hole corresponding to the return pipe 13 is compressed, the drilling fluid sample in the sampling space is pushed into the return pipe 13. The drilling fluid entering the return pipe 13 will eventually be guided to flow back into the assembly pipe 2. When the electric telescopic rod 10 controls the push ring 12 to move and reset in the box body 1, its pushing effect on the four mounting pipes 7 fails, and the pull rings in the four elastic traction members are pulled back. Under the corresponding action of the elastic pulling of the spring 39, the four hinged rods 38 are inserted into the four hinged tubes 37 through relative sliding, so that the four mounting tubes 7 are respectively slid and reset relative to the four telescopic tubes 6, and the four telescopic tubes 6 are respectively slid and reset relative to the four fixed tubes 5, so that the four compressed sampling spaces are restored to their original sizes. In this way, the samples entering the first detection component and the samples entering the second detection component will flow back from the two detection bottles 17 to their corresponding sampling spaces, so as to be rotated into the next external through hole for corresponding operations.

[0052] Furthermore, the sample discharged through the reflux pipe 13 will not flow back into the corresponding sampling space under the action of the one-way valve. When the installation pipe 7 corresponding to the sampling space fails due to the pushing action of the push ring 12, since the pressure in the sampling space is lower than the pressure outside the sampling space, the movement of the corresponding installation pipe 7 will have a certain hysteresis relative to the movement of the push ring 12, so that the installation pipe 7 and the push ring 12 are separated from each other, and the shielding effect of the push ring 12 on the installation pipe 7 corresponding to the sampling space fails, and the drilling fluid in the box 1 will enter the sampling space through the composite valve assembly. In order to dilute the residual sample in the sampling space, when the installation tube 7 corresponding to the sampling space rotates into the push ring 12 and cannot form a shielding area, that is, when the composite valve assembly and the liquid port 45 form a rotational overlap, the push ring 12 compresses and pushes the sampling space again, and the drilling fluid in the sampling space will be discharged through the composite valve assembly, that is, the sampling space has a tendency to become smaller, and the pressure in the sampling space is greater than the pressure outside the sampling space. The pressure difference acting on the step column 25 will cause the step column 25 to overcome the elastic tension of the inner ring spring 27 and form a relative pullout relative to the middle step ring 24. So that a flow channel is formed between the middle step ring 24 and the step column 25, the drilling fluid in the sampling space is discharged, and the discharged drilling fluid will be separated from the flow of the drilling fluid relative to the assembly pipe 2, so as to clean the residual sample in the previous detection process in the sampling space. When the compression and pushing effect of the push ring 12 on the sampling space fails again, the sampling space is enlarged and reset again under the pulling effect of the corresponding elastic pulling member. In this process, the external pressure of the sampling space is again greater than its internal pressure, and the pressure difference acting on the step column 25 has an effect on the step column 25 relative to the sampling space. The relative pulling-out pushing effect of the middle step ring 24 fails, and the step column 25 is inserted into the middle step ring 24 again under the elastic reset effect of the inner ring spring 27, and the outer ring spring 26 is elastically stretched under the action of the new internal and external pressure difference, and a flow channel is formed between the outer ring seat 23 and the middle step ring 24, so that the drilling fluid can be sampled again. Since the drilling fluid discharged in the previous step has formed a flow away, it will not affect the sampling of the drilling fluid. With the coordinated operation of the servo motor 11 and the electric telescopic rod 10, the online sampling and detection of the drilling fluid can be realized. The sampling and detection can be carried out continuously, which is more practical.

[0053] Going further, the sample entering the detection bottle 17 will form a detection operation under the action of the detector 18. The detector 18 is a detection device such as a camera, a PH detection sensor, a density sensor and a conductivity sensor. The camera can collect images of the sample entering the detection bottle 17 to provide judgment materials for the color, transparency and flow of the sample. The PH detection sensor can detect the PH value of the sample, the density sensor can detect the density of the sample, and the conductivity sensor can detect the conductivity of the sample, which is helpful to understand the content of salts and other electrolytes in the drilling fluid. After the detection bottle 17 is used, the external cleaning fluid is pumped into it through the cleaning pump, and the cleaning operation of the detection bottle 17 can be realized, so that the detection bottle 17 can be used for re-detection, which can better maintain the reliability of the detection data. When the detection bottle 17 is maintained or replaced, the rotating frame 15 is adjusted by rotating it relative to the sealing ring 14 so that the detection bottle 17 on the rotating frame 15 is rotated away from the corresponding external through hole. The access limit spring 31 will extend again after experiencing extreme compression to ensure that the relative position of the detection bottle 17 after the detection bottle 17 is rotated away from the external through hole, and the external through hole will be sealed and blocked by the rotating frame 15. Thereafter, the detection bottle 17 can be maintained or replaced. After the maintenance or replacement of the detection bottle 17 is completed, the rotating frame 15 is adjusted by rotating it in the opposite direction relative to the rotation direction of the aforementioned rotating frame 15 so that the access limit spring 31 is compressed again. When the access limit spring 31 is extended again after extreme compression, the detection bottle 17 will be connected and aligned with the corresponding external through hole again, and the relative position of the connected alignment will be stabilized, so that the detector 18 in the detection bottle 17 can be reconnected and used.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oilfield drilling test tool, comprising a housing (1), characterized in that: The invention also comprises a pipeline structure, wherein the pipeline structure comprises an assembly pipe (2), the housing (1) is fixedly connected to the assembly pipe (2), and the interior of the assembly pipe (2) is communicated with the interior of the housing (1), an axial frame (3) is rotatably connected to the housing (1), a disc frame (4) is fixedly connected to the axial frame (3), four fixed pipes (5) are fixedly connected to the disc frame (4), the four fixed pipes (5) are slidably connected to telescopic pipes (6), the four telescopic pipes (6) are slidably connected to mounting pipes (7), the four mounting pipes (7) are installed with composite valve assemblies, four elastic traction members are installed on the axial frame (3), the four elastic traction members are respectively connected to the four mounting pipes (7), the housing ( The bottom end of the housing (1) is fixedly connected to a central extension tube (8) and an offset extension tube (9), and the top end of the housing (1) is provided with three external through holes. The central extension tube (8) and the offset extension tube (9) are respectively installed with an electric telescopic rod (10) and a servo motor (11), and the servo motor (11) is used to drive the shaft frame (3) to rotate. A push ring (12) is slidably connected inside the housing (1), and the push ring (12) is connected to the telescopic rod of the electric telescopic rod (10). The push ring (12) is used to assist in pushing four mounting tubes (7). A first detection member, a second detection member and a return pipe (13) are respectively installed at the three external through holes, and the return pipe (13) is connected to the assembly pipe (2) through a one-way valve.

2. An oilfield drilling test tool according to claim 1, characterized in that: The first detection member and the second detection member both comprise a sealing ring (14) and a rotating frame (15); the two sealing rings (14) are both fixedly connected to the box body (1); the two rotating frames (15) are respectively rotatably connected in the two sealing rings (14); the two rotating frames (15) are each provided with a connecting port (16); a detection bottle (17) is detachably installed in each of the two connecting ports (16); a detector (18) is installed in the detection bottle (17); the two detectors (18) are each provided with an external lead wire (19); and an auxiliary rotating frame (20) is provided on each of the two rotating frames (15).

3. An oilfield drilling testing tool according to claim 2, characterized in that: The two communication ports (16) are provided with inner thread grooves (21), and the two detection bottles (17) are provided with outer thread grooves (22) at their bottle mouths. The two inner thread grooves (21) are respectively detachably threadedly connected to the two outer thread grooves (22).

4. An oilfield drilling testing tool according to claim 3, characterized in that: The four composite valve assemblies each comprise an outer ring seat (23), a middle step ring (24) and a step column (25); the four outer ring seats (23) are respectively fixedly connected in the four mounting tubes (7); the four middle step rings (24) are respectively slidably connected in the four outer ring seats (23); the four outer ring seats (23) are each fixedly connected with an outer ring spring (26); the four outer ring springs (26) are respectively fixedly connected with the four middle step rings (24); the four step columns (25) are respectively slidably connected in the four middle step rings (24); the four middle step rings (24) are each fixedly connected with an inner ring spring (27); the four inner ring springs (27) are respectively fixedly connected with the four step columns (25).

5. An oilfield drilling testing tool according to claim 4, characterized in that: The two auxiliary rotating frames (20) are each provided with an edge groove (28), a round shaft rod (29) is fixedly connected in the two edge grooves (28), a first rotating frame (30) is rotatably connected to the two round shaft rods (29), the two first rotating frames (30) are each fixedly connected to an access limit spring (31), the two access limit springs (31) are each fixedly connected to a second rotating frame (32), the two second rotating frames (32) are each rotatably connected to a connecting shaft (33), and the two connecting shafts (33) are each fixedly connected to the box body (1).

6. An oilfield drilling testing tool according to claim 5, characterized in that: The two detection bottles (17) are both connected to a pump-in quick-connect pipe (34) and an outflow quick-connect pipe (35), and the two pump-in quick-connect pipes (34) and the two outflow quick-connect pipes (35) are both equipped with a solenoid valve (36).

7. An oilfield drilling testing tool according to claim 6, characterized in that: The four elastic traction members each comprise an articulated tube (37) and an articulated rod (38); the four articulated tubes (37) are each articulated to the shaft frame (3); the four articulated rods (38) are respectively slidably connected to the four articulated tubes (37); tension springs (39) are fixedly connected inside the four articulated tubes (37); the four tension springs (39) are respectively fixedly connected to the four articulated rods (38); and the four articulated rods (38) are respectively articulated to the four mounting tubes (7).

8. An oilfield drilling testing tool according to claim 7, characterized in that: A transmission shaft (40) and a drive shaft (41) are fixedly connected to the output shaft of the servo motor (11) and the telescopic rod of the electric telescopic rod (10), respectively; a driving gear (42) and a driven gear ring (43) are installed on the transmission shaft (40) and the shaft frame (3), respectively; the driving gear (42) and the driven gear ring (43) are meshed with each other; a transmission ring frame (44) is rotatably connected to the drive shaft (41); the transmission ring frame (44) is slidably connected to the shaft frame (3); the push ring (12) is rotatably connected to the transmission ring frame (44); and a liquid passage port (45) is provided on the push ring (12); the inner diameter of the liquid passage port (45) is smaller than the inner diameter of the mounting tube (7) and larger than the outer diameter of the middle step column (25).

9. An oilfield drilling testing tool according to claim 8, characterized in that: The box body (1) is provided with an installation groove, a pressure sensor (46) is installed in the installation groove, an auxiliary pressure rod (47) is slidably connected in the installation groove, the auxiliary pressure rod (47) is connected to the push ring (12) via a connecting spring (48), a sealing pipe section (49) is slidably connected in the assembly tube (2), an outer ridge tube (50) is fixedly connected outside the assembly tube (2), an electric push-pull rod (51) is installed at one end of the outer ridge tube (50), a bridging plate (53) is connected to the push-pull rod of the electric push-pull rod (51) via a sealing rod (52), the bridging plate (53) is slidably connected in the outer ridge tube (50), and the bridging plate (53) is fixedly connected to the sealing pipe section (49), and the front and rear ends of the assembly tube (2) are fixedly connected with installation flanges (54).

10. A method for testing an oilfield drilling test tool, characterized in that: An oilfield drilling test tool according to any one of claims 1 to 9 is used, comprising the following steps: S1. When in use, firstly, the assembly pipe (2) is connected to a conveying pipe for drilling fluid so that the drilling fluid can flow through the interior of the assembly pipe (2), and the control power supply of the electric telescopic rod (10) and the servo motor (11) is turned on. A computer for information reading and control is installed for the first detection member and the second detection member, so that the information detected by the first detection member and the second detection member can be read and recorded by the computer, and the electric telescopic rod (10) and the servo motor (11) are connected to the computer, so as to achieve the purpose of controlling the operation of the electric telescopic rod (10) and the servo motor (11) by the computer; S2. When the drilling fluid flows through the conveying pipeline of the drilling fluid, the drilling fluid will pass through the inside of the assembly pipe (2), and the servo motor (11) will be powered on to realize the rotation drive of the shaft frame (3). The rotation of the shaft frame (3) will drive the disc frame (4) to rotate, and the rotation of the disc frame (4) will drive the four fixed pipes (5) to form synchronous rotation. During the rotation of the four fixed pipes (5), the four telescopic pipes (6) and the four installation pipes (7) will be driven to rotate synchronously. When the four installation pipes (7) rotate sequentially into the area where the push ring (12) cannot form an obstruction, that is, the corresponding installation pipe (7) enters the sampling position, the drilling fluid will form contact with the composite valve assembly, and under the pressure of the drilling fluid, the composite valve assembly will be linked to open, and finally the drilling fluid will enter the sampling space formed by the fixed pipe (5), the telescopic pipe (6) and the installation pipe (7); S3, along with the staged power-on operation of the servo motor (11), the position change of the four sampling spaces is realized, so that the four sampling spaces are rotated in sequence through the sampling position and the three external through holes, and the four sampling spaces that pass through the sampling position in sequence will form sequential sampling. When the sampling space rotates and enters the three external through holes, the composite valve assemblies in the mounting tubes (7) corresponding to the three sampling spaces will be limited by the push ring (12), and a contact seal will also be formed between the mounting tube (7) and the push ring (12); S4, when the electric telescopic rod (10) is powered on to realize the movement drive of the push ring (12), the push ring (12) will realize the sliding movement of the four installation tubes (7) relative to the four telescopic tubes (6), and will also make the four telescopic tubes (6) slide relative to the four fixed tubes (5), so as to realize the compression of the four sampling spaces. When the sampling space corresponding to the external through hole corresponding to the first detection member is compressed, the drilling fluid sample in the sampling space is pushed into the first detection member to form a detection. When the sampling space corresponding to the external through hole corresponding to the second detection member is compressed, the drilling fluid sample in the sampling space is pushed into the second detection member to form a detection. When the sampling space corresponding to the external through hole corresponding to the return pipe (13) is compressed, the drilling fluid sample in the sampling space is pushed into the return pipe (13). The drilling fluid entering the return pipe (13) will eventually be guided to flow back into the assembly pipe (2); S5. When the electric telescopic rod (10) controls the pushing ring (12) to move and reset in the housing (1), the pushing action on the four mounting tubes (7) becomes invalid. Under the corresponding action of the four elastic traction members, the four mounting tubes (7) respectively slide and reset relative to the four telescopic tubes (6), and the four telescopic tubes (6) respectively slide and reset relative to the four fixed tubes (5), so that the four compressed sampling spaces are restored to their original sizes. In this way, the sample entering the first detection member and the sample entering the second detection member are respectively returned to their corresponding sampling spaces, so as to be ready to rotate into the next external through hole to perform corresponding operations; S6. The sample discharged through the reflux pipe (13) will not flow back into the corresponding sampling space under the action of the one-way valve. When the installation pipe (7) corresponding to the sampling space fails to be pushed by the push ring (12), since the pressure in the sampling space is lower than the pressure outside the sampling space, the movement of the corresponding installation pipe (7) will have a certain hysteresis relative to the movement of the push ring (12), so that the installation pipe (7) and the push ring (12) are separated from each other, and the push ring (12) has a certain pressure on the sampling space. When the shielding effect of the installation tube (7) corresponding to the sampling space fails, the drilling fluid in the box (1) will enter the sampling space through the composite valve assembly to dilute the residual sample in the sampling space. When the installation tube (7) corresponding to the sampling space rotates into the push ring (12) and cannot form a shielding area, the push ring (12) will compress and push the sampling space again, and the drilling fluid in the sampling space will pass through the composite valve assembly and be discharged. The discharged drilling fluid will be separated from the assembly tube (2) along with the flow of the drilling fluid. S7. When the compressive pushing effect of the push ring (12) on the sampling space fails again, the sampling space is enlarged and reset again under the traction effect of the corresponding elastic traction member, so that the drilling fluid is sampled again. Since the drilling fluid discharged in the previous step has already flowed away, it will not affect the sampling of the drilling fluid. With the coordinated operation of the servo motor (11) and the electric telescopic rod (10), the online sampling and detection of the drilling fluid is realized.

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