Drilling fluid degassing device

Abstract

The invention belongs to the technical field of oil-gas exploration gas detection, and particularly relates to a drilling fluid degassing device. The drilling fluid degassing device comprises a fixed disc and a fixed disc, wherein a through hole is formed in the fixed disc along the axis in a penetrating manner; the rotary lifting disc is coaxially and rotatably arranged on the fixed disc, and a screw hole is formed in the rotary lifting disc along the axis in a penetrating manner; the screw rod is arranged in the screw hole through a thread; and the degasser is fixedly arranged at the lower end of the screw rod. Manual operation can be facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of gas detection in oil and gas exploration, and in particular, relates to a drilling fluid degassing device. Background Art

[0002] Gas detection is an important part of comprehensive logging construction services. Gas detection is a geochemical logging method that directly discovers and evaluates oil and gas layers by analyzing the content and components of oil and natural gas in drilling fluid. The main hardware equipment includes: total hydrocarbon detector, hydrocarbon component detector, non-hydrocarbon component detector (or carbon dioxide detector), hydrogen sulfide detector, degasser, hydrogen generator and air compressor, etc. Among them, the degasser is the basis of all the above gas detections. Its function is to separate and disperse the gas free in the drilling fluid through stirring, which is also a gas-liquid separation device.

[0003] There are many types of degassers, including float type, thermal vacuum distillation type, electric continuous type and quantitative type. The electric continuous degasser is commonly used at oil and gas exploration sites.

[0004] The float type degasser cannot ensure continuous degassing. At the same time, the drilling fluid needs to flow at a certain speed through the crushing teeth to remove the gas therein, and the degassing efficiency is low. Therefore, this type of degasser has been basically eliminated.

[0005] Thermal vacuum distillation degasser is a laboratory equipment that performs intermittent degassing. Although it has high degassing efficiency, it cannot meet the requirements of continuous degassing.

[0006] The quantitative degasser has high degassing efficiency, but if heavy hydrocarbon gases are to be separated, multiple sets of equipment must be added. This is limited by many conditions within the limited working space on site and has a low cost-performance ratio.

[0007] Electric continuous degassers are widely used in the field of gas detection in oil and gas exploration. During use, electric continuous degassers need to be adjusted up and down according to the liquid level of the drilling fluid. This height adjustment relies on the staff to control the adjustment part of the electric continuous degasser. However, in the process of adjusting the height of the existing electric continuous degasser, its adjustment part will change with the position of the degasser. The adjustment height range of the electric continuous degasser is large, which also causes a large range of height changes in its adjustment part. This change in the height of the adjustment part requires the staff to adjust the height of the degasser by climbing up. On the one hand, it is inconvenient to operate and will prolong the time required for the height adjustment of the electric continuous degasser, which will lead to untimely height adjustment of the degasser, affecting the degassing effect or damaging the motor; on the other hand, there are safety hazards, which are not conducive to the health of the staff. Summary of the invention

[0008] In view of the above-mentioned technical problems, the present invention aims to provide a drilling fluid degassing device which can be easily operated manually.

[0009] According to the present invention, there is provided a drilling fluid degassing device, comprising:

[0010] A fixed plate, wherein a through hole is provided along the axis of the fixed plate;

[0011] A rotating disk is coaxially rotatably arranged on the fixed disk, and a thread hole is arranged along the axis of the rotating disk;

[0012] A screw rod threadably disposed in the screw hole;

[0013] And a degasser fixedly arranged at the lower end of the screw rod.

[0014] In a preferred embodiment, the rotating disk is located above the fixed disk, and a plurality of balls are arranged between the rotating disk and the fixed disk.

[0015] In a preferred embodiment, ball grooves are provided at the lower end of the rotating disk and the upper end of the fixed disk, and the plurality of balls are arranged in the ball grooves.

[0016] In a preferred embodiment, the sum of the depth of the ball groove of the rotating plate and the depth of the ball groove of the fixed plate is smaller than the diameter of the ball.

[0017] In a preferred embodiment, the drilling fluid degassing device also includes two semi-circular ring-shaped chucks, which are interlocked and wrapped around the outside of the fixed plate and the rotating plate, and the chucks are configured to limit the relative axial movement between the fixed plate and the rotating plate.

[0018] In a preferred embodiment, the outer side surfaces of the fixed disk and the rotating disk are both provided with clamping grooves, and the inner side surface of the clamping disk is provided with flanges corresponding to the clamping grooves.

[0019] In a preferred embodiment, the degasser comprises:

[0020] a degassing chamber, wherein the drilling fluid enters from the bottom of the degassing chamber and the degassing gas is discharged from the upper part of the degassing chamber;

[0021] A stirring rod coaxially rotatably arranged in the degassing chamber;

[0022] A crushing plate is fixedly arranged in the degassing chamber, and the crushing plate is located above the stirring rod. Under the stirring of the stirring rod, the drilling fluid splashes to the crushing plate, thereby accelerating the separation of gas in the drilling fluid.

[0023] In a preferred embodiment, the stirring rod includes a vertical rod and a horizontal rod, the vertical rod is axially arranged in the degassing chamber, the horizontal rod is vertically fixed at the lower end of the vertical rod, and a plurality of stirring teeth are evenly arranged on the horizontal rod.

[0024] In a preferred embodiment, the crushing plate is configured to be a conical cylinder that is wider at the top and narrower at the bottom.

[0025] In a preferred embodiment, a motor is fixedly installed on the outer part of the upper end of the degassing chamber, and the output shaft of the motor extends to the interior of the degassing chamber and is fixedly connected to the stirring rod. A tower plate is fixedly installed above the motor, and a plurality of bolts for connecting with the degassing chamber are evenly arranged on the tower plate along the circumferential direction, and the tower plate is fixedly connected to the screw rod.

[0026] Compared with the prior art, the advantages of the present application are as follows.

[0027] The rotating disc of the present invention serves as a height adjustment part of the degasser, that is, the height of the degasser can be adjusted by rotating the rotating disc, and the height position of the rotating disc is fixed, thereby avoiding the frequent height climbing of the staff following the adjustment part, on the one hand, it can save time and avoid the motor of the degasser being submerged in the drilling fluid due to untimely adjustment, thereby damaging the motor, or the degasser being separated from the liquid level of the drilling fluid, allowing air to mix in and affecting the degassing effect. On the other hand, it reduces the safety risk of the staff during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be described below with reference to the accompanying drawings.

[0029] Figure 1 A schematic diagram showing an embodiment of a drilling fluid degassing device according to the present invention;

[0030] Figure 2 A schematic diagram showing an embodiment of a fixing plate according to the present invention;

[0031] Figure 3 A schematic diagram showing an embodiment of a spinning disc according to the present invention;

[0032] Figure 4 A schematic diagram showing an embodiment of a chuck according to the present invention is shown;

[0033] Figure 5 A schematic diagram of an embodiment of a righting mechanism according to the present invention is shown.

[0034] In the figure:

[0035] 1. Fixed plate; 11. Perforation; 12. Fixing piece; 2. Rotary plate; 21. Thread hole; 22. Rotating plate; 3. Screw rod; 31. Blocking plate; 32. Blocking bolt; 4. Degasser; 41. Degassing chamber; 411. Slurry outlet pipe; 412. Sample gas outlet; 413. Air inlet; 42. Stirring rod; 421. Vertical rod; 422. Horizontal rod; 423. Stirring teeth; 43. Crushing plate; 44 , chassis; 441, slurry inlet; 5, ball bearing; 51, ball groove; 6, chuck; 61, groove; 62, flange; 63, lock nose; 64, keyhole; 7, motor; 71, tower plate; 72, coupling; 73, fixing plate; 74, connecting screw; 75, fixing nut; 76, chassis; 8, righting mechanism; 81, righting block; 82, slide rod; 83, holder; 100, drilling fluid degassing device.

[0036] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present invention and are not drawn according to the actual scale. DETAILED DESCRIPTION

[0037] The present invention will be described below with reference to the accompanying drawings.

[0038] It should be noted that the directional terms or qualifiers "upper", "lower", "left", "right", etc. used in this application are all with reference to the drawings to which they are referred. They are not used to limit the absolute positions of the components involved, but can be changed according to specific circumstances.

[0039] Figure 1 The structure of the drilling fluid degassing device 100 according to the present invention is shown. Figure 1 As shown, the drilling fluid degassing device 100 includes a fixed plate 1 , a rotating plate 2 , a screw 3 and a degasser 4 .

[0040] The fixing plate 1 is set in a cylindrical shape, and a through hole 11 is set through the central axis of the fixing plate 1, and the screw rod 3 can pass through the through hole 11, and the through hole 11 will not restrict the movement of the screw rod 3. In actual use, the fixing plate 1 can be fixedly set above the liquid surface of the drilling fluid according to the actual installation situation.

[0041] The rotating disk 2 is set to be cylindrical in shape, and the rotating disk 2 is coaxially rotatably arranged on the fixed disk 1. A thread hole 21 is penetrated at the central axis of the rotating disk 2, and the screw rod 3 is threadedly arranged in the thread hole 21. When the rotating disk 2 and the screw rod 3 rotate relative to each other, the screw rod 3 can move along the axial direction relative to the rotating disk 2.

[0042] The degasser 4 is fixedly disposed at the lower end of the screw rod 3 , and the degasser 4 is configured to move in a vertical direction.

[0043] In this embodiment, the fixed disk 1 is fixed, the rotating disk 2 can rotate relative to the fixed disk 1, and the rotating disk 2 cannot move along the axial direction. When the rotating disk 2 rotates relative to the fixed disk 1, the screw rod 3 cannot rotate under the action of the degasser 4, so the screw rod 3 and the rotating disk 2 will rotate axially relative to each other, and the screw rod 3 will move along the axial direction under the action of the thread of the thread hole 21, thereby driving the degasser 4 to move along the axial direction, and adjusting the height of the degasser 4.

[0044] In a specific embodiment, the rotating disk 2 is located above the fixed disk 1, and a plurality of balls 5 are arranged between the rotating disk 2 and the fixed disk 1. The balls 5 can reduce the friction between the rotating disk 2 and the fixed disk 1, so that the rotating disk 2 can rotate more smoothly relative to the fixed disk 1.

[0045] Figure 2 A top view of the fixing plate 1 is shown, Figure 3 A bottom view of the rotating disk 2 is shown. Figure 2 No. Figure 3 As shown, ball grooves 51 are provided at the lower end of the rotating disk 2 and the upper end of the fixed disk 1. The two ball grooves 51 are arranged in annular shapes, and the annular sizes of the two ball grooves 51 are the same. Each ball 5 is arranged in the ball groove 51. When the rotating disk 2 rotates relative to the fixed disk 1, the ball 5 can rotate in the ball groove 51, thereby converting the sliding friction between the rotating disk 2 and the fixed disk 1 into rolling friction, thereby reducing the friction between the rotating disk 2 and the fixed disk 1.

[0046] Furthermore, the sum of the depth of the ball groove 51 of the rotating disk 2 and the depth of the ball groove 51 of the fixed disk 1 is smaller than the diameter of the ball 5. That is, after the ball 5 is arranged in the ball groove 51 between the rotating disk 2 and the fixed disk 1, there is a gap between the lower end surface of the rotating disk 2 and the upper end surface of the fixed disk 1. In this way, the rotating disk 2 is prevented from contacting with the fixed disk 1, thereby reducing friction.

[0047] In a preferred embodiment, the drilling fluid degassing device 100 further includes two semi-circular chucks 6. Figure 4 As shown, the two chucks 6 can form a ring after being buckled with each other, so as to wrap around the outside of the fixed disk 1 and the rotating disk 2, thereby ensuring that the central axes of the fixed disk 1 and the rotating disk 2 coincide with each other, and preventing the screw rod 3 from contacting the fixed disk 1. The chuck 6 is configured to limit the relative axial movement between the fixed disk 1 and the rotating disk 2, so that the height of the rotating disk 2 remains unchanged.

[0048] Specifically, a clamping groove 61 is provided on the outer side of the fixed disk 1 and the rotating disk 2, and the clamping groove 61 is set in the shape of an annular groove that is recessed inward. A flange 62 corresponding to the clamping groove 61 is provided on the inner side of the chuck 6. When the two chucks 6 are buckled with each other, the flanges 62 of the two chucks 6 are buckled with each other to form a circular ring shape corresponding to the shape of the clamping groove 61, that is, the flange 62 can extend into the clamping groove 61, so as to limit the axial position of the rotating disk 2 and the fixed disk 1 without hindering the relative rotation of the rotating disk 2 and the fixed disk 1.

[0049] It is easy to understand that at least one slot 61 is provided on each of the fixed disk 1 and the rotating disk 2. In this embodiment, one slot 61 is provided on each of the fixed disk 1 and the rotating disk 2. Accordingly, two flanges 62 are provided in sequence along the axial direction on the inner side surface of the chuck 6, and the two flanges 62 correspond to the slot 61 of the rotating disk 2 and the slot 61 of the fixed disk 1, respectively.

[0050] In a preferred embodiment, a blocking disk 31 is fixedly arranged on the top of the screw rod 3, and the size of the blocking disk 31 is larger than that of the screw rod 3. Under this arrangement, when the blocking disk 31 abuts against the upper end surface of the rotating disk 2 during the downward movement of the screw rod 3 relative to the rotating disk 2, it indicates that the screw rod 3 has been lowered to the limit position, thereby preventing the screw rod 3 from being separated from the rotating disk 2.

[0051] Specifically, the central axis of the blocking disk 31 coincides with the central axis of the screw rod 3 , a blocking bolt 32 is provided at the central axis of the blocking disk 31 , and the blocking bolt 32 is fixedly connected to the screw rod 3 by threaded connection.

[0052] According to the present invention, the degasser 4 includes a degassing chamber 41 , a stirring rod 42 , a breaking plate 43 and a motor 7 .

[0053] The degassing chamber 41 is configured to be in the shape of a hollow cylinder. During operation, the lower end of the degassing chamber 41 is immersed in drilling fluid, the drilling fluid enters from the bottom of the degassing chamber 41 , and the degassing gas is then discharged from the upper portion of the degassing chamber 41 .

[0054] Preferably, a chassis 44 is fixedly provided at the lower end of the degassing chamber 41, and a slurry inlet 441 is provided through the center of the chassis 44. A slurry outlet pipe 411 is provided on the cylindrical side wall of the degassing chamber 41, and the slurry outlet pipe 411 is inclined downward. The drilling fluid enters the degassing chamber 41 from the slurry inlet 441, and then continuously rolls under the action of the stirring rod 42. In this process, on the one hand, the gas in the drilling fluid is released, and on the other hand, part of the drilling fluid can be discharged from the slurry outlet pipe 411. That is to say, during the operation, the liquid level of the drilling fluid is located between the lower end of the slurry outlet pipe 411 and the slurry inlet 441, so that the degassed drilling fluid can be discharged from the degassing chamber 41 in time, and the drilling fluid containing gas can be replenished in time. A sample gas outlet 412 and an air inlet 413 are provided at the upper end of the degassing chamber 41, and the gas released from the drilling fluid is discharged from the degassing chamber 41 through the sample gas outlet 412, and the air inlet 413 is switched on and off according to the actual situation.

[0055] The stirring rod 42 is coaxially rotatably disposed in the degassing chamber 41. During operation, the stirring rod 42 impacts and stirs the drilling fluid entering the degassing chamber 41, forcing the gas in the drilling fluid to escape from the drilling fluid.

[0056] Specifically, the stirring rod 42 includes a vertical rod 421 and a horizontal rod 422. The vertical rod 421 is axially arranged in the degassing chamber 41, and the horizontal rod 422 is vertically fixed at the lower end of the vertical rod 421. A plurality of stirring teeth 423 are evenly arranged on the horizontal rod 422. The stirring teeth 423 can enhance the stirring effect on the drilling fluid.

[0057] The crushing plate 43 is configured to be a conical cylinder with a wide upper portion and a narrow lower portion, and the upper end diameter of the crushing plate 43 is equal to the inner diameter of the degassing chamber 41. The upper end of the crushing plate 43 is fixedly disposed at the inner upper end of the degassing chamber 41, and the crushing plate 43 is located above the stirring rod 42. Under the stirring of the stirring rod 42, the drilling fluid splashes to the crushing plate 43, and after the drilling fluid collides with the crushing plate 43, the gas separation speed in the drilling fluid can be further accelerated.

[0058] A fixing plate 73 is coaxially fixedly disposed outside the upper end of the degassing chamber 41, and the motor 7 is coaxially fixedly disposed on the upper end surface of the fixing plate 73. The output shaft of the motor 7 extends into the degassing chamber 41 and is coaxially fixedly connected to the vertical rod 421 of the stirring rod 42 through a coupling 72.

[0059] A tray 71 is fixedly arranged above the motor 7, and the central axis of the tray 71 coincides with the central axis of the degassing chamber 41. A plurality of connecting screws 74 for connecting with the degassing chamber 41 are evenly arranged along the circumferential direction on the tray 71. Specifically, the lower end of the connecting screw 74 is fixedly connected to the fixing plate 73 by threaded connection, and two fixing nuts 75 are arranged at the upper end of the connecting screw 74 by threaded connection. The tray 71 is located between the two fixing nuts 75, and the tray 71 is fixed by rotating the two fixing nuts 75 respectively.

[0060] A chassis 76 is coaxially fixedly disposed on the upper end of the tower plate 71 , and the tower plate 71 and the screw rod 3 are coaxially fixedly connected via the chassis 76 .

[0061] In a specific embodiment provided according to the present invention, the degassing chamber 41 is the main body for degassing the drilling fluid and is configured in a cylindrical shape with a height of 400 mm× an outer diameter of 200 mm× a wall thickness of 2 mm.

[0062] The bottom plate 44 is the bottom cover of the degassing chamber 41, and is set to be a cylindrical tube with a certain height and an upper end opening. Specifically, the bottom plate 44 has an inner diameter of 200 mm, a height of 50 mm, and a wall thickness of 2 mm. In this setting, the bottom plate 44 is sleeved on the outside of the degassing chamber 41, and the two are fixed with bolts. The stirring rod 42 can be installed and removed in the degassing chamber 41 by removing the bottom plate 44. A hole with a diameter of 100 mm is opened in the middle of the bottom plate 44, and the hole serves as a slurry inlet 441.

[0063] The stirring rod 42 is a horizontal and vertical connector made of stainless steel. Among them, the vertical rod 421 is 300mm long and 15mm in diameter, and the top is connected to the output shaft of the motor 7 through the coupling 72. A threaded rod with a diameter of 8mm is arranged at the bottom of the vertical rod 421, and the vertical rod 421 is fixedly connected to the horizontal rod 422 through the threaded rod. The horizontal rod 422 is 180mm long and 15mm in diameter, and a threaded hole with a diameter of 8mm is opened in the middle part of the horizontal rod 422. The central axis of the threaded hole is perpendicular to the central axis of the horizontal rod 422. The threaded hole of the horizontal rod 422 is fixed to the threaded rod of the vertical rod 421 by threaded connection, and is fixed with a pin after connection. A plurality of stirring teeth 423 are welded on the horizontal rod 422, and the stirring teeth 423 are used to improve the crushing effect of the drilling fluid.

[0064] The crushing plate 43 is an inverted cone plate with a height of 60 mm, a wall thickness of 2 mm, and a minimum inner diameter of 100 mm. The gas escapes upward from the hole with a minimum inner diameter of 100 mm in the middle. When the drilling fluid is stirred by the stirring rod 42, the splashing drilling fluid hits the crushing plate 43 upward at a high speed, so that the crushing plate 43 crushes the drilling fluid again. The crushing plate 43 cooperates with the stirring teeth 423 of the horizontal rod 422 to improve the crushing effect of the drilling fluid.

[0065] A hole with a diameter of 50 mm is opened on one side of the degassing chamber 41, and a 60 mm long slurry outlet pipe 411 is welded on the hole at an angle of 35 degrees downward. The drilling fluid stirred at high speed collides with the crushing plate 43 to cause the gas therein to escape, and then flows out of the degassing chamber 41 through the slurry outlet pipe 411. The escaped gas escapes into the sample gas outlet 412 through the middle hole of the crushing plate 43.

[0066] The top of the degassing chamber 41 is sealed with a steel plate with a diameter of 2 mm, and the steel plate is welded flush with the degassing chamber 41. Two holes with a diameter of 30 mm are opened on the steel plate, and a positive cone joint is welded on the holes. One of the two positive cone joints is used as the sample gas outlet 412, and the other is used as the air inlet 413. In this embodiment, the sample gas outlet 412 and the air inlet 413 are respectively located at the two ends of one diameter of the top end surface of the degassing chamber 41, so that the distance between the sample gas outlet 412 and the air inlet 413 is as far as possible.

[0067] A steel plate with a diameter of 120 mm and a wall thickness of 3 mm is welded at the center of the top steel plate of the degassing chamber 41, and the steel plate is used as a fixing plate 73. A plurality of threaded holes with a diameter of 8 mm are evenly opened along the circumferential direction on the fixing plate 73, and the threaded holes are used to connect with the connecting screw 74. A tower plate 71 is arranged at the upper end of the connecting screw 74. A motor 7 is fixedly arranged between the fixing plate 73 and the tower plate 71.

[0068] The connecting screw rod 74 has a diameter of 8 mm and a height of 250 mm. There are threads with a height of 50 mm at both ends of the connecting screw rod 74, and a smooth rod in the middle.

[0069] The tray 71 has a diameter of 120 mm and a thickness of 5 mm, and a plurality of holes corresponding to the fixing plate 73 are evenly arranged along the axial direction on the tray 71. During the installation process, a fixing nut 75 is first installed on the top thread of the connecting screw 74, and then the tray 71 is seated, and finally another fixing nut 75 is used to fix the tray 71.

[0070] A steel plate with a diameter of 60 mm and a thickness of 3 mm is welded at the center of the upper end surface of the tower plate 71 as the chassis 76. The chassis 76 is coaxially fixedly connected to the screw rod 3 by welding.

[0071] The screw rod 3 is threaded throughout, 1200 mm long and 25 mm in diameter, and is vertically welded to the chassis 76. A threaded hole is drilled along the central axis at the top of the screw rod 3, and a blocking plate 31 is provided at the top of the screw rod 3. The blocking plate 31 is fixed to the screw rod 3 by a blocking bolt 32. The blocking plate 31 is used to prevent the screw rod 3 from shaking out of the rotating lifting plate 2.

[0072] The fixed disk 1 is a cylindrical solid steel disk with a diameter of 160 mm and a thickness of 50 mm. A through hole 11 with a diameter greater than 25 mm is bored in the middle, and the hole is used as a through hole for the screw rod 3. A ball groove 51 with a diameter of 8 mm and a depth of 3.5 mm is bored on the top surface of the fixed disk 1, and a ball 5 with a diameter of 8 mm is placed in the ball groove 51. A plurality of fixing parts 12 are welded on the side of the fixed disk 1. When the whole device needs to be fixed in a certain position, the fixing parts 12 can be fixedly connected to the fixed objects in the construction site, so that the fixed disk 1 is fixed. A rectangular card groove 61 with a depth of 20 mm and a width of 10 mm is bored at the center of the height of the circumferential side of the fixed disk 1, and the card groove 61 is used to connect with the flange 62 of the chuck 6.

[0073] The lifting disk 2 is a solid cylindrical steel disk with a diameter of 160 mm and a thickness of 50 mm. A thread hole 21 with a diameter of 25 mm is bored in the middle. The thread hole 21 is used to cooperate with the screw rod 3. A ball groove 51 with a diameter of 8 mm and a depth of 3.5 mm is bored on the top surface of the lifting disk 2. The ball groove 51 has the same annular diameter as the ball groove 51 of the fixed disk 1. The ball 5 is arranged between the ball groove 51 of the fixed disk 1 and the ball groove 51 of the lifting disk 2. Under the action of the ball 5, the lifting disk 2 can rotate relative to the fixed disk 1, that is, the lifting disk 2 is non-fixed. A rectangular groove 61 with a depth of 20 mm and a width of 10 mm is bored on the cylindrical side of the lifting disk 2. The groove 61 is used to connect with the flange 62 of the chuck 6. The fixed disk 1 and the lifting disk 2 are connected by the chuck 6, thereby limiting the axial relative position between the fixed disk 1 and the lifting disk 2.

[0074] After the balls are placed on the fixed plate 1 and the rotating plate 2, a gap of 1 mm is formed to provide free rotation space for the two plates to rotate.

[0075] The chuck 6 is a pair of semicircular bodies, which are buckled together to form a ring with an outer diameter of 180 mm and a wall thickness of 20 mm. A raised flange 62 is provided inside the chuck 6, and the flange 62 is seated in the slot 61 of the fixed disk 1 and the rotating disk 2. The two halves of the chuck 6 are buckled together through the locking nose 63 and the keyhole 64, and fixed with screws. The two locking noses 63 are arranged up and down along the axis direction of the chuck 6 and welded to the chuck 6. The two keyholes 64 are grooves chiseled in the chuck 6 and corresponding to the shapes of the two locking noses 63. There are wire holes running through the middle of the locking noses 63 and the keyholes 64 for connecting screws. The curvature of the locking noses 63 and the keyholes 64 is the same as the circumferential curvature of the chuck 6.

[0076] A turntable 22 is provided on the top surface of the rotating disk 2. The turntable 22 is wound with a steel ring and welded to the top surface of the rotating disk 2. The turntable 22 has a diameter of 200 mm and is welded to the disk surface of the rotating disk 2 through four bending braces. The turntable 22 is turned by hand, and the turntable 22 drives the rotating disk 2 to rotate, thereby realizing the height change of the screw rod 3.

[0077] In a specific embodiment provided according to the present invention, the drilling fluid degassing device 100 further includes a straightening mechanism 8, and the straightening mechanism 8 is used to further prevent the screw rod 3 from rotating in the circumferential direction.

[0078] like Figure 5 As shown, the straightening mechanism 8 includes a straightening block 81 , a slide bar 82 and a clamping seat 83 .

[0079] The straightening block 81 is a square steel tube with a length of 150 mm, an outer width of 40 mm, and a wall thickness of 5 mm, and is vertically welded to the outer wall of the degassing chamber 41 along the length direction.

[0080] The slide bar 82 is a square steel tube with an outer width of 30 mm, and the length of the slide bar 82 is determined according to the needs. The slide bar 82 is slidably inserted into the straightening block 81.

[0081] The holder 83 is fixedly disposed on the slide bar 82 . During the actual construction process, the slide bar 82 is fixedly connected to a fixed object on site through the holder 83 .

[0082] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0083] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drilling fluid degassing device, characterized in that: include: A fixed disk (1), wherein a through hole (11) is provided along the axis of the fixed disk (1); A rotating disk (2) is coaxially rotatably arranged on the fixed disk (1), and a thread hole (21) is provided along the axis of the rotating disk (2); A screw rod (3) threadably disposed in the screw hole (21); and a degasser (4) fixedly arranged at the lower end of the screw rod (3), wherein the degasser (4) is configured to move in a vertical direction.

2. The drilling fluid degassing device according to claim 1, characterized in that: The rotating disk (2) is located above the fixed disk (1), and a plurality of balls (5) are arranged between the rotating disk (2) and the fixed disk (1).

3. The drilling fluid degassing device according to claim 2, characterized in that: A ball groove (51) is provided at the lower end of the rotating disk (2) and the upper end of the fixed disk (1), and a plurality of the balls (5) are arranged in the ball groove (51).

4. The drilling fluid degassing device according to claim 3, characterized in that: The sum of the depth of the ball groove (51) of the rotating disk (2) and the depth of the ball groove (51) of the fixed disk (1) is smaller than the diameter of the ball (5).

5. The drilling fluid degassing device according to claim 1, characterized in that: The drilling fluid degassing device further comprises two semi-circular ring-shaped chucks (6), the two chucks (6) being interlocked and wrapped around the outer sides of the fixed plate (1) and the rotating plate (2), and the chucks (6) are configured to limit the relative axial movement between the fixed plate (1) and the rotating plate (2).

6. The drilling fluid degassing device according to claim 5, characterized in that: A clamping groove (61) is provided on the outer side surfaces of the fixed disk (1) and the rotating disk (2), and a flange (62) corresponding to the clamping groove (61) is provided on the inner side surface of the clamping disk (6).

7. The drilling fluid degassing device according to any one of claims 1 to 6, characterized in that: The degasser (4) comprises: a degassing chamber (41), wherein drilling fluid enters from the bottom of the degassing chamber (41), and degassing gas is discharged from the top of the degassing chamber (41); a stirring rod (42) coaxially rotatably arranged in the degassing chamber (41); A crushing plate (43) is fixedly arranged in the degassing chamber (41), and the crushing plate (43) is located above the stirring rod (42). Under the stirring of the stirring rod (42), the drilling fluid splashes onto the crushing plate (43), thereby accelerating the separation of gas in the drilling fluid.

8. The drilling fluid degassing device according to claim 7, characterized in that: The stirring rod (42) comprises a vertical rod (421) and a horizontal rod (422); the vertical rod (421) is axially arranged in the degassing chamber (41); the horizontal rod (422) is vertically fixed at the lower end of the vertical rod (421); and a plurality of stirring teeth (423) are evenly arranged on the horizontal rod (422).

9. The drilling fluid degassing device according to claim 7, characterized in that: The crushing plate (43) is configured to be a conical cylinder that is wider at the top and narrower at the bottom.

10. The drilling fluid degassing device according to claim 7, characterized in that: A motor (7) is fixedly arranged outside the upper end of the degassing chamber (41); an output shaft of the motor (7) extends into the interior of the degassing chamber (41) and is fixedly connected to the stirring rod (42); a tower plate (71) is fixedly arranged above the motor (7); a plurality of bolts for connecting to the degassing chamber (41) are evenly arranged on the tower plate (71) along a circumferential direction; and the tower plate (71) is fixedly connected to the screw rod (3).

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