Drilling fluid sampling device

Abstract

The utility model relates to a drilling fluid sampling device, and relates to the field of drilling fluid sampling equipment.The drilling fluid sampling device comprises an outer cylinder, a sampling barrel is slidably connected to the interior of the outer cylinder, a floating bag is fixedly connected to the side wall of the outer cylinder, a water inlet hole is formed in the side wall of the sampling barrel, and a fixing assembly is arranged on the side wall of the outer cylinder; the fixing assembly limits the sampling barrel to be separated from the interior of the outer cylinder. The drilling fluid sampling device can be used for sampling drilling fluid in a deep layer in a mud pit, and the situation that the final test result is affected due to sedimentation layering of the obtained drilling fluid sample is avoided.

Description

Technical Field

[0001] The present application relates to the field of drilling fluid sampling equipment, and in particular to a drilling fluid sampling device. Background Art

[0002] After working underground, the drilling fluid drives the rock cuttings drilled by the drill bit to the ground. After screening by the high-frequency vibrating screen, the rock cuttings and part of the mud in the drilling fluid are screened out. The screened drilling fluid enters the mud pool and mixes with other drilling fluids in the mud pool. The properties of the drilling fluid change after mixing, and the properties of the drilling fluid affect the drilling speed. The staff needs to sample and test the drilling fluid in the mud pool many times.

[0003] Existing oilfield drilling fluid rapid sampling devices mostly require workers to stand next to the mud pool and hold the oilfield drilling fluid rapid sampling device to sample the drilling fluid. However, the existing oilfield drilling fluid rapid sampling device is mostly a simple sampling bucket that directly samples the liquid inside the well.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the existing sampling methods can only sample the surface of the drilling fluid and are unable to sample and analyze the deep-layer fluid. Utility Model Content

[0005] In order to sample drilling fluid deep in the mud pool and avoid sedimentation and stratification of the obtained drilling fluid samples, which affects the final test results, the present application provides a drilling fluid sampling device.

[0006] The present application provides a drilling fluid sampling device, which adopts the following technical solution:

[0007] A drilling fluid sampling device includes an outer cylinder, a sampling barrel is slidably connected to the interior of the outer cylinder, a float bag is fixedly connected to the side wall of the outer cylinder, a water inlet hole is provided on the side wall of the sampling barrel, and a fixing component is provided on the side wall of the outer cylinder, which limits the sampling barrel from detaching from the interior of the outer cylinder.

[0008] Optionally, a water inlet groove is opened on the side wall of the outer cylinder, and the water inlet groove is opposite to the water inlet hole. The opening direction of the water inlet groove is the same as the moving direction of the sampling bucket inside the outer cylinder.

[0009] Optionally, the side wall of the outer cylinder is fixedly connected to a protective shell, and a water stop column is horizontally arranged inside the protective shell. When the water inlet hole is opposite to the water stop column, the water stop column closes the water inlet hole. One end of the water stop column is connected to a first elastic member, and the end of the first elastic member is fixedly connected to the protective shell.

[0010] Optionally, the fixing assembly includes a stop block fixed to the side wall of the sampling barrel, a stop plate is arranged below the water stop column, the stop block is opposite to the stop plate, the width of the stop plate is not less than the sum of the widths of the water stop column and the stop block, a connecting plate is arranged between the water stop column and the first elastic member, the stop plate is slidably connected to the connecting plate, the stop plate is slidably connected to the sampling barrel, and a second elastic member is vertically arranged below the stop plate.

[0011] Optionally, a first magnet is fixedly connected to the protective shell, and a second magnet is fixedly connected to the side wall of the sampling barrel at a position relative to the first magnet, and the first magnet and the second magnet are relatively adsorbed.

[0012] Optionally, the sampling barrel includes a main body and a plurality of bottom covers arranged opposite to each other at the bottom end of the main body, and the plurality of bottom covers are fixed by fasteners.

[0013] Optionally, a stirring assembly is provided inside the sampling barrel, and the stirring assembly stirs the medium inside the sampling barrel. A driving member for driving the stirring assembly to rotate is provided inside the outer cylinder.

[0014] Optionally, the stirring assembly includes a stirring shaft connected to the driving member, a stirring rod is fixedly connected to the outer side of the stirring shaft, and the stirring shaft is a retractable structure.

[0015] Optionally, the stirring shaft includes a square shaft located inside, and a connecting shaft is sleeved on the outside of the square shaft, and the connecting shaft slides along the axial direction of the square shaft.

[0016] Optionally, the bottom wall of the sampling barrel is fixedly connected to a buckle seat, a slot is provided on the buckle seat, the bottom wall of the connecting shaft is fixedly connected to a buckle, the buckle is located in the slot, and the buckle is rotatably connected to the buckle seat.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] The device can be thrown into drilling fluid through a rope connection. Part of the device floats to the surface of the drilling fluid, and the other part continues to sink as the drilling fluid is absorbed. In addition, the upper and lower parts are provided with retractable stirring mechanisms to achieve moderate stirring while collecting drilling fluid samples deep in the drilling fluid to prevent it from settling and stratification. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a drilling fluid sampling device in an embodiment of the present application.

[0020] Figure 2 This is a cross-sectional view of the overall structure of a drilling fluid sampling device in an embodiment of the present application.

[0021] Figure 3 yes Figure 2 Enlarged view of part A.

[0022] Figure 4 yes Figure 2 Magnified view of part B.

[0023] Explanation of the accompanying reference numerals: 1. outer cylinder; 11. tie rope member; 12. float; 13. water inlet tank; 2. sampling bucket; 21. water storage chamber; 22. water inlet hole; 23. main body; 231. positioning block; 232. slide groove; 233. second magnet; 24. bottom cover; 241. protrusion; 242. fastening block; 243. fastener; 25. push block; 3. locking assembly; 31. protective shell; 311. first magnet; 32. connecting plate; 33. first spring; 34. water stop column; 35. push plate; 36. second spring; 4. stirring assembly; 41. stirring shaft; 411. square shaft; 412. connecting shaft; 413. buckle; 42. rotating motor; 43. stirring rod; 44. buckle seat; 441. slot. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0026] The following is combined with Figure 1-4 This application is described in further detail.

[0027] The present application discloses a drilling fluid sampling device. Figure 1 、 Figure 2 A drilling fluid sampling device includes an outer barrel 1, with a sampling barrel 2 vertically slidably connected thereto. A locking assembly 3 is provided at the lower portion of the outer barrel 1 relative to the sampling barrel 2 to limit the position of the sampling barrel 2. A stirring assembly 4 is provided within the sampling barrel 2 to stir the medium within the sampling barrel 2.

[0028] The outer tube 1 is a hollow cylindrical barrel with an open bottom. The top of the outer tube 1 is fixedly connected to a tie rope part 11. A through hole for connecting a pull rope is horizontally opened on the tie rope part 11. The pull rope can be fixed relative to the tie rope part 11 through the through hole, and then the outer tube 1 can be operated by stretching it.

[0029] The side wall of the outer tube 1 is fixedly connected with a float bladder 12 by bolts. The float bladder 12 is a circular ring structure and is coaxially arranged with the outer tube 1. The float bladder 12 drives the outer tube 1 to float on the surface of the liquid.

[0030] The sampling barrel 2 is a hollow cylindrical structure coaxially arranged with the outer barrel 1. The outer wall of the sampling barrel 2 abuts and slides relative to the inner wall of the outer barrel 1. A water storage chamber 21 is defined within the sampling barrel 2. A water inlet 22 is horizontally defined in the sidewall of the sampling barrel 2. This connects the outside world to the water storage chamber 21, allowing external media to enter the water storage chamber 21 through the water inlet 22.

[0031] A water inlet groove 13 is horizontally provided on the side wall of the outer cylinder 1 at a position relative to the water inlet hole 22. The water inlet groove 13 completely penetrates the side wall of the outer cylinder 1, and the water inlet groove 13 is opposite to the water inlet hole 22. The opening direction of the water inlet groove 13 is opened along the moving direction of the sampling barrel 2 inside the outer cylinder 1, so that when the sampling barrel 2 is located inside the outer cylinder 1 and slides relatively, the water inlet hole 22 can be relatively connected with the water inlet groove 13 at any time, and the external medium can enter the interior of the water inlet hole 22 through the water inlet groove 13, and then enter the water storage cavity 21 inside the sampling barrel 2 through the water inlet hole 22.

[0032] Reference Figure 2 、 Figure 3 The sampling barrel 2 includes a main body 23 located at the upper part, and two bottom covers 24 are relatively provided at the bottom end of the main body 23. When the two bottom covers 24 are relatively abutted, the two bottom covers 24 completely seal the interior of the water storage chamber 21. When the two bottom covers 24 slide in opposite directions, the two bottom covers 24 open the interior of the water storage chamber 21.

[0033] Reference Figure 3 、 Figure 4 The side wall of the bottom cover 24 is fixedly connected to a protrusion 241. The bottom end of the protrusion 241 is slidably connected to the main body 23, and the side wall of the protrusion 241 extends from the outer wall of the bottom cover 24. The bottom end of the main body 23 is fixedly connected to a positioning block 231. The positioning block 231 has a horizontal groove 232 at the position relative to the protrusion 241. The protrusion 241 is located within the groove 232 and slides relative to it.

[0034] A fastening block 242 is fixedly connected to one side of the bottom wall of the bottom cover 24, and the two opposing fastening blocks 242 are fixed relative to each other via a fastener 243. When the two fastening blocks 242 are fixed relative to each other via the fastener 243, the two bottom covers 24 abut against each other via the fastening blocks 242, forming a sealed water storage chamber 21 inside the sampling barrel 2. When the fastener 243 is removed from the side walls of the two fastening blocks 242, the two bottom covers 24 can move in opposite directions within the chute 232 via the protrusion 241, and the two bottom covers 24 open the water storage chamber 21 inside the sampling barrel 2, allowing the medium inside the water storage chamber 21 to be discharged through the opening between the two bottom covers 24.

[0035] Reference Figure 2 、 Figure 4 The locking device includes a protective shell 31, which is fixedly connected to the outer tube 1. A connecting plate 32 is vertically arranged inside the protective shell 31. An opening is opened on the top wall of the protective shell 31 at a position relative to the connecting plate 32. The top end of the connecting plate 32 extends from the position of the opening, and the connecting plate 32 is slidably connected to the protective shell 31.

[0036] A first spring 33 is horizontally disposed on the side of the connecting plate 32 facing away from the sampling barrel 2. One end of the first spring 33 is fixedly connected to the protective shell 31, and the other end of the first spring 33 is fixedly connected to the connecting plate 32. A water stop column 34 is horizontally disposed on the side of the connecting plate 32 facing away from the first spring 33 and is fixedly connected to the connecting plate 32.

[0037] The structure of the water stop column 34 is relatively matched with the interior of the water inlet hole 22. When the sampling barrel 2 slides downward, the water inlet hole 22 on the sampling barrel 2 is opposite to the water stop column 34. The first spring 33 pushes the connecting plate 32 to move toward the side close to the sampling barrel 2, and the connecting plate 32 pushes the water stop column 34 into the interior of the water inlet hole 22, and the water inlet hole 22 is completely closed by the water stop column 34.

[0038] A stop plate 35 is horizontally disposed below the water stop column 34. One end of the stop plate 35 is slidably connected to the connecting plate 32, and the other end of the stop plate 35 is slidably connected to the outer wall of the sampling barrel 2. A second spring 36 is vertically disposed below the stop plate 35. The bottom end of the second spring 36 is fixedly connected to the protective shell 31, and the top end of the second spring 36 is fixedly connected to the stop plate 35.

[0039] A stop block 25 is fixedly connected to the outer wall of the sampling barrel 2 at a position relative to the stop plate 35. The width of the stop plate 35 is not less than the sum of the widths of the stop block 25 and the water stop column 34, so that when the stop plate 35 abuts the connecting plate 32, a gap is left between the water stop column 34 and the outer wall of the sampling barrel 2 for the stop block 25 to slide.

[0040] When the sampling barrel 2 moves downward, the stop block 25 passes through the gap between the water stop column 34 and the sampling barrel 2, and the stop block 25 abuts against the stop plate 35, and then the stop block 25 pushes the stop plate 35 to move downward, compressing the second spring 36, and the stop plate 35 is separated from the connecting plate 32, and the connecting plate 32 pushes the water stop column 34 into the interior of the water inlet hole 22 to close the water inlet hole 22.

[0041] A first magnet 311 is fixedly connected to the bottom wall of the protective shell 31 , and a second magnet 233 is fixedly connected to the top wall of the positioning block 231 at a position relative to the first magnet 311 . The first magnet 311 and the second magnet 233 can be relatively attracted.

[0042] When the device is placed inside the medium, the medium enters the water storage chamber 21 of the sampling barrel 2 through the water inlet groove 13 and the water inlet hole 22. When the overall gravity of the sampling barrel 2 is greater than the adsorption force of the first magnet 311 and the second magnet 233, the first magnet 311 and the second magnet 233 are separated, allowing the sampling barrel 2 to slide vertically inside the outer tube 1.

[0043] The stop block 25 located on the outside of the sampling barrel 2 abuts against the stop plate 35 through the gap between the water stop column 34 and the sampling barrel 2. As the sampling barrel 2 descends, the stop block 25 pushes the stop plate 35 to move downward, and the stop plate 35 is relatively separated from the connecting plate 32. The connecting plate 32 pushes the water stop column 34 into the water inlet hole 22, thereby sealing the water storage chamber 21 inside the sampling barrel 2.

[0044] Reference Figure 2 、 Figure 3 The stirring assembly 4 includes a stirring shaft 41 located at the center. The stirring shaft 41 is arranged vertically and coaxially with the sampling barrel 2. A rotary motor 42 is fixedly connected to the interior of the outer barrel 1 relative to the stirring shaft 41. The drive shaft of the rotary motor 42 is fixedly connected to the stirring shaft 41. A power supply for the rotary motor 42 is fixedly connected to the interior of the outer barrel 1. A plurality of stirring rods 43 are fixedly connected to the outer wall of the stirring shaft 41. The stirring rods 43 are driven by the rotation of the stirring shaft 41 to rotate within the sampling barrel 2, thereby stirring the medium within the water storage chamber 21.

[0045] The stirring shaft 41 includes a square shaft 411 located inside, and the horizontal cross-section of the square shaft 411 is a square structure. A connecting shaft 412 is sleeved on the outside of the square shaft 411, and the connecting shaft 412 is vertically slidably connected to the square shaft 411. The stirring rod 43 is fixed to the outer wall of the connecting shaft 412.

[0046] A snap seat 44 is fixedly connected to the bottom of the inner side wall of the sampling barrel 2. The snap seat 44 is divided into two parts relative to the bottom shell, and a slot 441 is defined within the snap seat 44. A snap 413 is fixedly connected to the bottom end of the connecting shaft 412 at a position relative to the slot 441. The snap 413 extends into the slot 441 and is connected to the connecting shaft for relative rotation.

[0047] When the two bottom covers 24 are relatively disengaged, the slot 441 of the snap seat 44 opens, and the snap 413 located inside the slot 441 is disengaged; when the two bottom covers 24 are relatively abutted, the snap seat 44 snaps the snap 413 into the inside of the slot 441; in the process of the sampling barrel 2 moving downward, the sampling barrel 2 drives the connecting shaft 412 to move along the axial direction through the relative cooperation between the snap seat 44 and the snap 413, thereby increasing the length of the stirring shaft 41, and continuously stirring the medium inside the sampling barrel 2 through the stirring rod 43 located outside the connecting shaft 412.

[0048] In this application, the term "plurality" refers to at least two or more than two, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integrally connected; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0049] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A drilling fluid sampling device, characterized in that: The invention comprises an outer cylinder (1), wherein a sampling barrel (2) is slidably connected to the interior of the outer cylinder (1), a float bag (12) is fixedly connected to the side wall of the outer cylinder (1), a water inlet hole (22) is provided on the side wall of the sampling barrel (2), and a fixing component is provided on the side wall of the outer cylinder (1), wherein the fixing component restricts the sampling barrel (2) from being separated from the interior of the outer cylinder (1).

2. The drilling fluid sampling device according to claim 1, characterized in that: A water inlet groove (13) is provided on the side wall of the outer cylinder (1), and the water inlet groove (13) is opposite to the water inlet hole (22). The opening direction of the water inlet groove (13) is the same as the moving direction of the sampling barrel (2) inside the outer cylinder (1).

3. The drilling fluid sampling device according to claim 1, characterized in that: The side wall of the outer cylinder (1) is fixedly connected to a protective shell (31), and a water stop column (34) is horizontally arranged inside the protective shell (31). When the water inlet hole (22) is opposite to the water stop column (34), the water stop column (34) closes the water inlet hole (22). One end of the water stop column (34) is connected to a first elastic member, and the end of the first elastic member is fixedly connected to the protective shell (31).

4. The drilling fluid sampling device according to claim 3, characterized in that: The fixing assembly includes a stop block (25) fixed to the side wall of the sampling barrel (2), a stop plate (35) is provided below the water stop column (34), the stop block (25) is opposite to the stop plate (35), the width of the stop plate (35) is not less than the sum of the widths of the water stop column (34) and the stop block (25), a connecting plate (32) is provided between the water stop column (34) and the first elastic member, the stop plate (35) is slidably connected to the connecting plate (32), the stop plate (35) is slidably connected to the sampling barrel (2), and a second elastic member is vertically provided below the stop plate (35).

5. The drilling fluid sampling device according to claim 3, characterized in that: A first magnet (311) is fixedly connected to the protective shell (31), and a second magnet (233) is fixedly connected to the side wall of the sampling barrel (2) at a position relative to the first magnet (311), and the first magnet (311) and the second magnet (233) are relatively attracted to each other.

6. The drilling fluid sampling device according to claim 1, characterized in that: The sampling barrel (2) comprises a main body (23) and a plurality of bottom covers (24) arranged opposite to each other at the bottom end of the main body (23), and the plurality of bottom covers (24) are fixed by fasteners (243).

7. The drilling fluid sampling device according to claim 1, characterized in that: A stirring assembly (4) is provided inside the sampling barrel (2), and the stirring assembly (4) stirs the medium inside the sampling barrel (2). A driving member for driving the stirring assembly (4) to rotate is provided inside the outer cylinder (1).

8. The drilling fluid sampling device according to claim 7, characterized in that: The stirring assembly (4) comprises a stirring shaft (41) connected to the driving member, a stirring rod (43) is fixedly connected to the outer side of the stirring shaft (41), and the stirring shaft (41) is a retractable structure.

9. The drilling fluid sampling device according to claim 8, characterized in that: The stirring shaft (41) includes a square shaft (411) located inside, and a connecting shaft (412) is sleeved on the outside of the square shaft (411), and the connecting shaft (412) slides along the axial direction of the square shaft (411).

10. The drilling fluid sampling device according to claim 9, characterized in that: The bottom wall of the sampling barrel (2) is fixedly connected to a buckle seat (44), a slot (441) is provided on the buckle seat (44), the bottom wall of the connecting shaft (412) is fixedly connected to a buckle (413), the buckle (413) is located in the slot (441), and the buckle (413) is rotatably connected to the buckle seat (44).

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