Drilling fluid pressure detection control device

Abstract

The utility model relates to a drilling fluid pressure detection control device, and relates to the technical field of drilling fluid pressure control. The drilling fluid pressure detection and control device comprises a liquid conveying pipe; the pressure control assembly comprises a shell, the shell comprises a first cavity, a pressure relief opening and a pressurization opening, the pressure relief opening and the pressurization opening are communicated with the first cavity, and the first cavity is communicated with the infusion tube; the adjusting part is arranged in the first cavity of the shell, the adjusting part can move in the first cavity in the axial direction of the shell according to the pressure of drilling fluid in the first cavity, and the adjusting part is constructed to be that the pressure relief opening is opened and the pressurization opening is closed when the adjusting part moves to the first position, or the pressure relief opening is closed and the pressurization opening is opened when the adjusting part moves to the second position. According to the drilling fluid pressure detection control device, the pressure of the drilling fluid can be adjusted in real time according to the pressure of the drilling fluid in the drilling engineering construction process, and the drilling fluid can be stably recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling fluid pressure control, and particularly to a drilling fluid pressure detection and control device. Background Art

[0002] Drilling fluid is a liquid substance used to protect the drill bit, extend the life of the drill bit, cool the drill bit, and help maintain the wellbore.

[0003] During the construction process of the drilling project, according to the different degrees of drilling, the flow rate and pressure of the drilling fluid discharged from the bottom of the well are also different. Generally, the drilling fluid is slowly lost, so the pressure of the drilling fluid is constantly decreasing. When the crushed stones at the bottom of the well increase, the pressure will rise. Therefore, it is necessary to adjust the pressure of the drilling fluid in real time according to the size of the drilling fluid pressure during the construction process to control the increase and decrease of the drilling fluid pressure and enable the drilling fluid to be recycled stably. Summary of the Utility Model

[0004] The utility model provides a drilling fluid pressure detection and control device, which can adjust the pressure of the drilling fluid in real time according to the size of the drilling fluid pressure during the construction process of the drilling project, so that the drilling fluid can be recycled stably.

[0005] An embodiment of the utility model provides a drilling fluid pressure detection and control device. The drilling fluid pressure detection and control device includes: an infusion pipe; and a pressure control component. The pressure control component includes: a housing, including a first chamber, a pressure relief port and a pressure boost port communicated with the first chamber, and the first chamber is communicated with the infusion pipe; and an adjusting member, arranged in the first chamber of the housing, and the adjusting member can move axially in the first chamber according to the pressure of the drilling fluid in the first chamber. The adjusting member is configured such that when it moves to the first position, the pressure relief port is opened and the pressure boost port is closed, or when it moves to the second position, the pressure relief port is closed and the pressure boost port is opened.

[0006] According to any of the foregoing embodiments of the utility model, the adjusting member includes: an adjusting cylinder, slidably installed in the first chamber, the adjusting cylinder includes a second chamber, a first opening and a second opening respectively communicated with the second chamber; a check valve assembly, arranged at the first opening, and the check valve assembly is configured to conduct from the inside of the second chamber to the outside of the second chamber; and a connecting member, connected between the adjusting cylinder and the housing, for adjusting the sliding of the adjusting cylinder axially in the first chamber of the housing. Among them, the drilling fluid pressure detection and control device includes a pressure relief state and a pressure boost state: the adjusting cylinder is configured to block the pressure boost port of the housing in the pressure relief state and open the pressure relief port; and block the pressure relief port of the housing in the pressure boost state, and the pressure boost port is communicated with the second chamber of the adjusting cylinder through the second opening.

[0007] According to any of the foregoing embodiments of the present utility model, the connecting member includes: a connecting rod; one end of the connecting rod is fixedly connected to the adjusting cylinder, and the other end passes through the housing and is slidably connected to the housing; and an elastic member sleeved on the connecting rod, one end of the elastic member is connected to the end of the connecting rod away from the adjusting cylinder, and the other end is fixedly connected to the housing.

[0008] According to any of the foregoing embodiments of the present utility model, the connecting member further includes: an adjusting bolt threadedly connected to the end of the connecting rod away from the adjusting cylinder; an adjusting plate fixedly connected to the end of the adjusting bolt away from the adjusting cylinder; a pressure plate provided with a through hole, the end of the connecting rod away from the adjusting cylinder passes through the through hole and is slidably connected to the pressure plate, and the end of the elastic member away from the adjusting cylinder is fixedly connected to the pressure plate; and a connecting plate disposed between the pressure plate and the adjusting plate, one end is fixedly connected to the adjusting plate, and the other end is fixedly connected to the pressure plate.

[0009] According to any of the foregoing embodiments of the present utility model, the infusion tube includes a liquid inlet tube and a liquid outlet tube, and the pressure control assembly is communicated with the liquid outlet tube; the drilling fluid pressure detection and control device further includes: a filtering device, the filtering device includes a top cover, a bottom cover, a side wall, a liquid inlet and a liquid outlet, the side wall encloses between the top cover and the bottom cover and forms a filtering chamber, the liquid inlet and the liquid outlet are communicated with the filtering chamber, the liquid inlet is communicated with the liquid outlet end of the liquid inlet tube, and the liquid outlet is communicated with the liquid inlet end of the liquid outlet tube.

[0010] According to any of the foregoing embodiments of the present utility model, the liquid inlet is disposed at a position on the side wall close to the top cover, the liquid outlet is disposed on the top cover, one end of the liquid outlet tube passes through the liquid outlet and extends into the filtering chamber, the cross-sectional area of the filtering device gradually decreases from the top cover to the bottom cover along its own axis, and / or, a guiding thread is provided on the inner surface of the side wall.

[0011] According to any of the foregoing embodiments of the present utility model, the filtering device further includes an exhaust assembly, and the exhaust assembly includes an exhaust port disposed on the top cover, and the exhaust port is communicated with the filtering chamber.

[0012] According to any of the foregoing embodiments of the present utility model, the exhaust assembly further includes a housing, a first liquid blocking plate and a second liquid blocking plate, the housing has an accommodating chamber, the accommodating chamber is communicated with the filtering chamber, the exhaust port is disposed at one end of the housing away from the top cover, the liquid outlet tube passes through the housing and enters the filtering chamber, the outer edge of the first liquid blocking plate is hermetically connected to the inner wall of the housing, the first liquid blocking plate is in clearance fit with the tube wall of the liquid outlet tube, the outer edge of the second liquid blocking plate is hermetically connected to the tube wall of the liquid outlet tube, the outer edge of the second liquid blocking plate is in clearance fit with the inner wall of the housing, and the first liquid blocking plate and the second liquid blocking plate are spaced apart along the axis of the filtering device in the accommodating chamber.

[0013] According to any of the aforementioned embodiments of the utility model, the filtering device also includes a stirring assembly, which includes: a driving device, the driving device is arranged on the top cover, the driving device is provided with a driving shaft, and the driving shaft is passed through the filter chamber; a first turntable, fixedly connected to the driving shaft; a second turntable, transmission connected to the first turntable, the side of the second turntable facing the top cover and the side of the top cover facing the filter chamber are rotatably engaged with each other, and a stirring rod, one end of the stirring rod is fixedly connected to the side of the second turntable facing away from the top cover.

[0014] According to any of the aforementioned embodiments of the utility model, the stirring assembly also includes: a third turntable, which is sleeved on the outer tube wall of the liquid outlet pipe near the liquid inlet, the third turntable is rotatably connected to the outer tube wall of the liquid outlet pipe, and the other end of the stirring rod is rotatably connected to the third turntable.

[0015] The utility model provides a drilling fluid pressure detection control device. The drilling fluid pressure detection control device includes a fluid delivery pipe and a pressure control assembly. The pressure control assembly includes a housing and an adjusting member. The housing includes a first chamber and a pressure relief port and a pressure boost port respectively connected to the first chamber. The first chamber is connected to the fluid delivery pipe. The adjusting member is arranged in the first chamber of the housing, and the adjusting member can move in the first chamber along the axial direction of the housing according to the pressure of the drilling fluid in the first chamber. The adjusting member is configured to open the pressure relief port and close the pressure boost port when it moves to the first position, or close the pressure relief port and open the pressure boost port when it moves to the second position. According to the drilling fluid pressure detection control device of the embodiment of the present application, when in use, the fluid delivery pipe is connected to the drilling fluid in the drilling engineering construction process. Since the first chamber of the housing in the pressure control assembly is connected to the fluid delivery pipe, the drilling fluid in the fluid delivery pipe can enter the first chamber of the housing, and then the adjusting member arranged in the first chamber of the housing can move in the first chamber along the axial direction of the housing according to the pressure of the drilling fluid in the first chamber. When the adjusting member moves to the first position, the pressure relief port of the housing is opened and the pressure boosting port is closed, and the drilling fluid in the first chamber can be depressurized through the first pressure relief port, so that the pressure of the drilling fluid in the first chamber is reduced. When the adjusting member moves to the second position, the pressure relief port is closed and the pressure boosting port is opened, and the external drilling fluid in communication with the pressure boosting port can enter the first chamber of the housing through the pressure boosting port, so that the pressure of the drilling fluid in the first chamber is increased, and then the pressure of the drilling fluid can be adjusted in real time during the drilling project construction process, so that the drilling fluid can be stably circulated and used, thereby improving the construction efficiency of the drilling project. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of a drilling fluid pressure detection and control device in an embodiment of the utility model;

[0018] Figure 2 is a cross-sectional schematic view of the drilling fluid pressure detection and control device in the embodiment of the present utility model;

[0019] Figure 3 is a structural schematic view of the pressure control component in the drilling fluid pressure detection and control assembly in the embodiment of the present utility model;

[0020] Figure 4 is a cross-sectional schematic view of the pressure control component in the drilling fluid pressure detection and control device in the embodiment of the present utility model.

[0021] Reference numerals:

[0022] 1000 - drilling fluid pressure detection and control device;

[0023] 100 - liquid delivery pipe; 110 - liquid inlet pipe; 120 - liquid outlet pipe;

[0024] 200 - pressure control component; 210 - housing; Q1 - first chamber; 211 - pressure relief port; 212 - pressure boosting port; 220 - adjusting member; 221 - adjusting cylinder; Q2 - second chamber; 2211 - first opening; 2212 - second opening; 222 - one-way valve assembly; 223 - connecting member; 2231 - connecting rod; 2232 - elastic member; 2233 - adjusting bolt; 2234 - adjusting plate; 2235 - pressing disc; 2236 - connecting plate;

[0025] 300 - filtering device; 310 - top cover; 320 - bottom cover; 330 - side wall; S - guiding thread; 340 - liquid inlet; 350 - liquid outlet; 360 - exhaust assembly; 361 - exhaust port; 362 - outer shell; 363 - first liquid baffle; 364 - second liquid baffle; 370 - stirring assembly; 371 - driving device; 372 - first turntable; 373 - second turntable; 374 - stirring rod; 375 - third turntable. Detailed implementation manners

[0026] The present utility model will be further described below in conjunction with the accompanying drawings.

[0027] The present utility model provides a drilling fluid pressure detection and control device, which can adjust the pressure of the drilling fluid in real time according to the magnitude of the drilling fluid pressure during the construction process of the drilling project, so that the drilling fluid can be recycled stably.

[0028] Figure 1 is a structural schematic view of the drilling fluid pressure detection and control device in the embodiment of the present utility model; Figure 2 is a cross-sectional schematic view of the drilling fluid pressure detection and control device in the embodiment of the present utility model; Figure 3It is a schematic structural diagram of the pressure control component in the drilling fluid pressure detection and control component in the embodiment of the present utility model; Figure 4 It is a schematic cross-sectional view of the pressure control component in the drilling fluid pressure detection and control device in the embodiment of the present utility model. As Figures 1-4 shown, the embodiment of the present utility model provides a drilling fluid pressure detection and control device. The drilling fluid pressure detection and control device 1000 includes an infusion pipe 100 and a pressure control component 200. The pressure control component 200 includes a housing 210 and an adjusting member 220. The housing 210 includes a first chamber Q1, a pressure relief port 211 and a pressure boost port 212 that are respectively communicated with the first chamber Q1. The first chamber Q1 is communicated with the infusion pipe 100. The adjusting member 220 is arranged in the first chamber Q1 of the housing 210, and the adjusting member 220 can move axially in the first chamber Q1 according to the pressure of the drilling fluid in the first chamber Q1. The adjusting member 220 is configured such that when it moves to the first position, the pressure relief port 211 is opened and the pressure boost port 212 is closed, or when it moves to the second position, the pressure relief port 211 is closed and the pressure boost port 212 is opened.

[0029] It should be noted that the infusion pipe 100 is communicated with the drilling fluid during the drilling operation, that is, the drilling fluid during the drilling process can enter the pipeline of the infusion pipe 100, so the pressure of the drilling fluid in the first chamber Q1 of the housing 210 is the same as the pressure of the drilling fluid in the infusion pipe 100. The pressure relief port 211 of the housing 210 is communicated with the pressure relief pipeline. When the pressure relief port 211 is opened, the drilling fluid in the first chamber Q1 can flow into the pressure relief pipeline through the pressure relief port 211. The pressure boost port 212 of the housing 210 is communicated with the pressure boost pipeline, and the pressure boost pipeline is communicated with the external drilling fluid. When the pressure boost port 212 is opened, the external drilling fluid can flow into the first chamber Q1 through the pressure boost port 212.

[0030] It can be understood that the adjusting member 220 can be an adjusting cylinder 221 assembly disposed in the first chamber Q1 of the housing 210, or a switching valve assembly disposed at the pressure relief port 211 and the pressure boosting port 212. When the adjusting member 220 is the adjusting cylinder 221 assembly, when the drilling fluid pressure in the first chamber Q1 is normal, the pressure relief port 211 and the pressure boosting port 212 of the housing 210 are respectively blocked, so that the pressure relief port 211 and the pressure boosting port 212 are in a closed state. When the drilling fluid pressure in the first chamber Q1 increases, it can push the adjusting cylinder 221 to move axially along the housing 210, so that the adjusting cylinder 221 moves to the first position. When the drilling fluid pressure in the first chamber Q1 decreases, the adjusting cylinder 221 can move axially along the housing 210 to the second position. Similarly, when the adjusting member 220 is a switching valve assembly disposed at the pressure relief port 211 and the pressure boosting port 212, the pressure control assembly 200 is equivalent to a three-way valve connected to the infusion tube 100. One of the pipelines of the three-way valve is connected to the infusion tube 100, and the other two pipelines are respectively a pressure boosting pipeline and a pressure relief pipeline. When the drilling fluid pressure in the pipeline connected to the infusion tube 100 increases, the switching valve at the pressure relief port 211 opens, and the switching valve at the pressure boosting port 212 closes. When the drilling fluid in the pipeline connected to the infusion tube 100 decreases, the switching valve at the pressure relief port 211 closes, and the switching valve at the pressure boosting port 212 opens.

[0031] The adjusting member 220 can move axially in the first chamber Q1 along the housing 210 according to the magnitude of the drilling fluid pressure in the first chamber Q1. It can be understood that when the adjusting member 220 does not move in the first chamber Q1, both the pressure relief port 211 and the pressure boosting port 212 of the housing 210 are in a closed state. When the drilling fluid pressure in the first chamber Q1 increases, the adjusting member 220 can move to the first position, so that the pressure relief port 211 opens, and at the same time the pressure boosting port 212 remains closed, so that the drilling fluid in the first chamber Q1 flows out from the pressure relief port 211, and the drilling fluid pressure in the first chamber Q1 decreases. When the drilling fluid pressure in the first chamber Q1 decreases, the adjusting member 220 moves to the second position, so that the pressure relief port 211 closes, and at the same time the pressure boosting port 212 opens, so that the drilling fluid in the pressure boosting pipeline enters the first chamber Q1 from the pressure boosting port 212, thereby increasing the drilling fluid pressure in the first chamber Q1.

[0032] According to the drilling fluid pressure detection and control device of the embodiments of the present application, during use, the infusion pipe 100 is connected to the drilling fluid in the drilling engineering construction process. Since the first chamber Q1 of the housing 210 in the pressure control assembly 200 is connected to the infusion pipe 100, the drilling fluid in the infusion pipe 100 can enter the first chamber Q1 of the housing 210, and then the adjusting member 220 provided in the first chamber Q1 of the housing 210 can move along the axial direction of the housing 210 in the first chamber Q1 according to the pressure of the drilling fluid in the first chamber Q1. When the adjusting member 220 moves to the first position, the pressure relief port 211 of the housing 210 is opened and the pressure increase port 212 is closed, and the drilling fluid in the first chamber Q1 can relieve the pressure of the drilling fluid in the first chamber Q1 through the first pressure relief port 211, so that the pressure of the drilling fluid in the first chamber Q1 is reduced. When the adjusting member 220 moves to the second position, the pressure relief port 211 is closed and the pressure increase port 212 is opened, and the external drilling fluid communicated with the pressure increase port 212 can enter the first chamber Q1 of the housing 210 through the pressure increase port 212, so that the pressure of the drilling fluid in the first chamber Q1 is increased. Furthermore, the magnitude of the drilling fluid pressure during the drilling engineering construction process can be adjusted in real time, so that the drilling fluid can be stably recycled, thereby improving the construction efficiency of the drilling engineering.

[0033] As Figure 1 shown, in some embodiments, the infusion pipe 100 includes a liquid inlet pipe 110 and a liquid outlet pipe 120. The pressure control assembly 200 is connected to the liquid outlet pipe 120. The drilling fluid pressure detection and control device further includes a filtering device 300. The filtering device 300 includes a top cover 310, a bottom cover 320, a side wall 330, a liquid inlet 340, and a liquid outlet 350. The side wall 330 encloses between the top cover 310 and the bottom cover 320 and forms a filtering chamber. The liquid inlet 340 and the liquid outlet 350 are both connected to the filtering chamber. The liquid inlet 340 is connected to the liquid outlet end of the liquid inlet pipe 110, and the liquid outlet 350 is connected to the liquid inlet end of the liquid outlet pipe 120.

[0034] In this embodiment, the liquid inlet pipe 110 of the infusion pipe 100 is connected to the liquid inlet 340 of the filtering device 300, so that the drilling fluid in the liquid inlet pipe 110 can flow into the filtering chamber of the filtering device 300 through the liquid inlet 340 for filtering, so that part of the sand and gravel contained in the drilling fluid during drilling can be filtered out. The filtered drilling fluid enters the liquid outlet pipe 120 from the liquid outlet 350 of the filtering chamber. Since the pressure control assembly 200 is connected to the liquid outlet pipe 120, the pressure control assembly 200 adjusts the pressure of the filtered drilling fluid and enables the drilling fluid to be maintained within a stable pressure range, thereby improving the construction efficiency of the drilling engineering.

[0035] It should be noted that in this embodiment, after the drilling fluid enters the filtration chamber of the filtration device 300, the filtration chamber can filter the drilling fluid. Specifically, the filtration structure of the filtration chamber is not limited. It can be a filtration chamber provided with a filter screen or a filtration chamber of a centrifugal device, as long as the filtration function can be achieved.

[0036] As Figure 1 shown, in some embodiments, the liquid inlet 340 is arranged at a position on the side wall 330 close to the top cover 310, the liquid outlet 350 is arranged on the top cover 310, one end of the liquid outlet pipe 120 penetrates through the second liquid outlet 350 and extends into the filtration chamber, and the cross-sectional area of the filtration device 300 gradually decreases along its own axis from the top cover 310 to the bottom cover 320, and / or, a diversion thread S is arranged on the inner surface of the side wall 330.

[0037] According to the drilling fluid pressure control device of the embodiment of the present application, the cross-sectional area of the filtration device 300 gradually decreases along its own axis from the top cover 310 to the bottom cover 320, and the liquid inlet 340 is arranged at a position on the side wall 330 close to the top cover 310, so that the drilling fluid entering the filtration chamber from the liquid inlet 340 can flow downward in a rotating manner, which helps the sedimentation and filtration of sand and gravel in the drilling fluid during the rotation process. The filtered drilling fluid can enter the liquid outlet pipe 120 from the filtration chamber through the liquid outlet 350.

[0038] In some alternative embodiments, a diversion thread S is arranged on the inner surface of the side wall 330 of the filtration device 300. The diversion thread S is used to guide the drilling fluid entering the filtration chamber, so that the sand and gravel contained in the drilling fluid can be better sedimented.

[0039] In some alternative embodiments, a lower discharge pipeline is further arranged in the filtration chamber. The lower discharge pipeline is arranged at the bottom of the filtration device 300 and is used to discharge the sand and gravel deposited at the bottom of the filtration chamber.

[0040] As Figures 1-2 shown, in some embodiments, the filtration device 300 further includes an exhaust assembly 360. The exhaust assembly 360 includes an exhaust port 361 arranged on the top cover 310, and the exhaust port 361 is communicated with the filtration chamber.

[0041] According to the drilling fluid pressure control device of the embodiment of the present application, the gas in the drilling fluid entering the filtration chamber can be discharged through the exhaust port 361 on the top cover 310, and the drilling fluid is exhaustively treated to prevent the gas from entering the liquid outlet pipe 120 from the liquid outlet 350, thereby affecting the pressure of the drilling fluid in the liquid outlet pipe 120 and making the pressure of the drilling fluid more stable.

[0042] As Figures 1-2As shown, in some embodiments, the exhaust assembly 360 further includes a housing 362, a first liquid retaining plate 363, and a second liquid retaining plate 364. The housing 362 has a housing chamber, the housing chamber is connected to the filter chamber, the exhaust port 361 is arranged at one end of the housing 362 away from the top cover 310, the liquid outlet pipe 120 is penetrated by the housing 362 and enters the filter chamber, the outer edge of the first liquid retaining plate 363 is sealed and connected to the inner wall of the housing 362, the first liquid retaining plate 363 and the tube wall gap of the liquid outlet pipe 120 are matched, the outer edge of the second liquid retaining plate 364 is sealed and connected to the tube wall of the liquid outlet pipe 120, the outer edge of the second liquid retaining plate 364 and the inner wall gap of the housing 362 are matched, and the first liquid retaining plate 363 and the second liquid retaining plate 364 are spaced in the housing chamber along the axial direction of the filter device 300.

[0043] According to the drilling fluid pressure detection and control device 1000 of the embodiment of the present application, the gas escaping from the drilling fluid entering the filter chamber will gather at the top of the filter chamber. Since the outer shell 362 of the exhaust component 360 is arranged on the top cover 310, and the accommodating chamber of the outer shell 362 is connected to the filter chamber, the gas gathered at the top of the filter chamber can enter the shell 210 and be discharged from the exhaust port 361 of the shell 210. Since the liquid outlet pipe 120 passes through the outer shell 362 and enters the filter chamber, and has a gap with the top cover 310 of the filter device 300, the outer edge of the first liquid baffle plate 363 arranged on the outer shell 362 of the exhaust component 360 is sealedly connected to the inner wall of the outer shell 362, the first liquid baffle plate 363 has a gap with the tube wall of the liquid outlet pipe 120, the outer edge of the second liquid baffle plate 364 is sealedly connected to the tube wall of the liquid outlet pipe 120, and the outer edge of the second liquid baffle plate 364 has a gap with the inner wall of the outer shell 362, so that the exhaust component 360 can exhaust the drilling fluid in the filter chamber while avoiding the discharge of the drilling fluid.

[0044] like Figure 2 As shown, in some embodiments, the filter device 300 also includes a stirring assembly 370, which includes: a driving device 371, which is arranged on the top cover 310, and the driving device 371 is provided with a driving shaft, and the driving shaft is passed through the filter chamber; a first turntable 372, which is fixedly connected to the driving shaft; a second turntable 373, which is transmission-connected to the first turntable 372, and the side of the second turntable 373 facing the top cover 310 is rotatably engaged with the side of the top cover 310 facing the filter chamber, and a stirring rod 374, one end of which is fixedly connected to the side of the second turntable 373 facing away from the top cover 310.

[0045] One side of the second turntable 373 facing the top cover 310 is rotatably clamped with one side of the top cover 310 facing the filtration chamber. It can be understood that, on the side of the second turntable 373 facing the top cover 310, an annular protrusion may be provided, and correspondingly, on the side of the top cover 310 facing the filtration chamber, an annular groove is provided. The annular protrusion and the annular groove are clamped and matched, and at the same time, a clearance fit between the annular protrusions enables the annular protrusions to rotate relative to the annular groove. Alternatively, on the side of the second turntable 373 facing the top cover 310, a plurality of spaced sliders may also be provided on the circumference corresponding to the annular groove, and the sliders are rotatably clamped with the annular groove.

[0046] The first turntable 372 and the second turntable 373 are in transmission connection. It can be understood that the transmission between the first turntable 372 and the second turntable 373 may be gear transmission, or friction transmission, or belt transmission. Here, the transmission relationship between the first turntable 372 and the second turntable 373 is not limited.

[0047] According to the drilling fluid pressure detection and control device 1000 of the embodiment of the present application, the stirring assembly 370 provided in the filtering device 300 can stir the drilling fluid in the filtering chamber. Specifically, the driving device 371 provided on the top cover 310 can drive the driving shaft to rotate. Since the driving shaft passes through the top cover 310 and is fixedly connected to the first turntable 372 in the filtering chamber, when the driving shaft rotates, it drives the first turntable 372 to rotate, and then drives the second turntable 373 that is in transmission connection with the first turntable 372 to rotate, so that the stirring rod 374 provided on the side of the second turntable 373 away from the top cover 310 stirs the drilling fluid in the filtering chamber as the second turntable 373 rotates, accelerating the escape of gas in the drilling fluid.

[0048] As Figure 2 shown, in some embodiments, the stirring assembly 370 further includes a third turntable 375. The third turntable 375 is arranged in the filtering chamber and sleeved on the outer wall of the liquid outlet pipe 120. The third turntable 375 is rotatably connected to the outer wall of the liquid outlet pipe 120, and the other end of the stirring rod 374 is fixedly connected to the third turntable 375.

[0049] The drilling fluid pressure detection and control device 1000 according to the embodiments of the present application. Since the third turntable 375 is sleeved on the outer wall of the liquid outlet pipe 120 and is rotatably connected to the outer wall of the liquid outlet pipe 120, and at the same time, the second turntable 373 is fixedly connected to the third turntable 375 through the stirring rod 374. When the driving device 371 of the stirring assembly 370 drives the first turntable 372 to rotate, the second turntable 373 can drive the third turntable 375 to rotate while rotating with the first turntable 372. The stirring rod 374 connected between the second turntable 373 and the third turntable 375 can stir the drilling fluid in the filtering chamber to accelerate the escape of gas in the drilling fluid. Since the third turntable is rotatably connected to the outer wall of the liquid outlet pipe 120, the stirring rod 374 connected between the second turntable 373 and the third turntable 375 is more stable during the process of following the second turntable 373 to rotate.

[0050] As Figure 4 shown, in some embodiments, the adjusting member 220 includes an adjusting cylinder 221, a one-way valve assembly 222, and a connecting member 223. The adjusting cylinder 221 is slidably installed in the first chamber Q1. The adjusting cylinder 221 includes a second chamber Q2 and a first opening 2211 and a second opening 2212 respectively communicating with the second chamber Q2. The one-way valve assembly 222 is disposed at the first opening 2211. The one-way conduction assembly is configured to conduct from the inside of the second chamber Q2 to the outside of the second chamber Q2. The connecting member 223 is connected between the adjusting cylinder 221 and the housing 210 for adjusting the sliding of the adjusting cylinder 221 along the axial direction in the first chamber Q1 of the housing 210. Among them, the drilling fluid pressure detection and control device includes a pressure relief state and a pressure boost state. The adjusting cylinder 221 is configured to block the pressure boost port 212 of the housing 210 in the pressure relief state, and the pressure relief port 211 is opened; and in the pressure boost state, the pressure relief port 211 of the housing 210 is blocked, and the pressure boost port 212 is communicated with the second chamber Q2 of the adjusting cylinder 221 through the second opening 2212.

[0051] It should be noted that, in the present embodiment, the pressure relief port 211 and the pressure boost port 212 of the housing 210 are arranged in sequence along the axial direction of the housing 210. When the first chamber Q1 of the housing 210 is communicated with the infusion pipe 100, the pressure relief port 211 is located at the end close to the infusion pipe 100, and the pressure boost port 212 is located at the end far from the infusion pipe 100. The first opening 2211 of the adjusting cylinder 221 is disposed at one end of the adjusting cylinder 221 along the axial direction, and the second opening 2212 is disposed on the side wall 330 of the adjusting cylinder 221. The adjusting cylinder 221 is disposed in the first chamber Q1 of the housing 210, and the axial direction of the adjusting cylinder 221 itself is parallel to the axial direction of the housing 210. When the adjusting cylinder 221 moves along the axial direction of the housing 210 to the second position, the pressure boost port 212 can be communicated with the second chamber Q2 through the second opening 2212.

[0052] The connecting member 223 is connected between the adjusting cylinder 221 and the housing 210 and is used to adjust the axial sliding of the adjusting cylinder 221 in the first chamber Q1 of the housing 210. It can be understood that when the pressure of the drilling fluid in the first chamber Q1 is in a normal state, the connecting member 223 can make the adjusting cylinder 221 block the pressure relief port 211 and the pressure boosting port 212. At the same time, the connecting member 223 adjusts the magnitude of the pressure at which the adjusting cylinder 221 starts to move relative to the housing 210, that is, when the drilling fluid pressure increases to a certain value, the adjusting cylinder 221 starts to move relative to the housing 210 towards the first position, or when the drilling fluid pressure decreases to a certain value, the adjusting cylinder 221 can start to move relative to the housing 210 towards the second position.

[0053] For the drilling fluid pressure detection and control device 1000 according to the embodiment of the present application, the adjusting cylinder 221 can move axially along the housing 210 according to the magnitude of the pressure of the drilling fluid in the first chamber Q1. When the liquid pressure in the first chamber Q1 increases, it can push the adjusting cylinder 221 to move axially along the housing 210 away from the direction of the infusion pipe 100, so that the adjusting cylinder 221 moves away from the pressure relief port 211 of the housing 210, and the pressure relief port 211 is opened. The drilling fluid with a higher pressure in the first chamber Q1 flows into the pressure relief pipeline, thereby reducing the pressure of the drilling fluid in the first chamber Q1 of the housing 210 and making the liquid pressure in the first chamber Q1 decrease. When the pressure of the drilling fluid in the first chamber decreases, the adjusting cylinder 221 moves axially along the housing 210 towards the direction close to the infusion pipe 100, so that the second chamber Q2 of the adjusting cylinder 221 is connected to the pressure boosting pipeline through the second opening 2212. The drilling fluid in the pressure boosting pipeline enters the second chamber Q2, and due to the one-way conduction component provided by the adjusting cylinder 221 at the first opening 2211, it enters the first chamber Q1 of the housing 210 from the second chamber Q2, making the pressure of the drilling fluid in the first chamber Q1 increase. The adjusting cylinder 221 adjusts the pressure of the drilling fluid according to the magnitude of the pressure of the drilling fluid in the first chamber Q1, so that the pressure of the drilling fluid is always maintained within a stable pressure range during the drilling process, enabling the drilling fluid to be recycled stably, and improving the construction efficiency and construction quality of the drilling project.

[0054] As Figure 4 shown, in some embodiments, the connecting member 223 includes a connecting rod 2231 and an elastic member 2232. One end of the connecting rod 2231 is fixedly connected to the adjusting cylinder 221, and the other end passes through the housing 210 and is slidably connected to the housing 210. The elastic member 2232 is sleeved on the connecting rod 2231. One end of the elastic member 2232 is connected to the end of the connecting rod 2231 away from the adjusting cylinder 221, and the other end is fixedly connected to the housing 210.

[0055] In this embodiment, when the pressure of the drilling fluid in the first chamber Q1 increases, the adjusting cylinder 221 moves axially along the housing 210 under the pressure of the drilling fluid. When it moves to the first position, the pressure relief port 211 blocked by the adjusting cylinder 221 is opened, and the pressure boosting port 212 remains closed. The drilling fluid in the first chamber Q1 flows out through the pressure relief port 211, so that the pressure of the drilling fluid in the first chamber Q1 decreases.

[0056] When the pressure of the drilling fluid in the first chamber Q1 continues to rise, the adjusting cylinder 221 moves. During the movement, the connecting rod 2231 moves relative to the housing 210 along with the adjusting cylinder 221. During the movement, the elastic member 2232 is stretched until the pressure relief port 211 is opened and the drilling fluid can enter the pressure relief pipeline. When the pressure of the drilling fluid in the first chamber Q1 decreases, the adjusting cylinder 221 continuously descends. During the descent, the connecting rod 2231 descends relative to the housing 210 along with the adjusting cylinder 221, so that the elastic member 2232 is compressed and finally the pressure boosting port 212 is opened, and the pressure relief port 211 is closed. The elastic member 2232 can balance the force received by the adjusting cylinder 221 during the movement of the adjusting cylinder 221, so that the adjusting cylinder 221 can move as required.

[0057] It should be noted that in this embodiment, the connecting member 223 includes a connecting rod 2231 and an elastic member 2232. In some other alternative embodiments, the connecting member 223 may also only include the elastic member 2232. The elastic member 2232 is arranged in the first chamber Q1. One end of the elastic member 2232 is fixedly connected to the outer wall of the adjusting cylinder 221, and the other end is fixedly connected to the inner wall of the housing 210, which can also play a role in balancing the force on the adjusting cylinder 221. Specifically, the elastic member 2232 can be a spring or an elastic rubber member, which is not limited here.

[0058] As Figure 4 shown, in some embodiments, the connecting member 223 further includes an adjusting bolt 2233, an adjusting plate 2234, a pressure plate 2235 and a connecting plate 2236. The adjusting bolt 2233 is threadedly connected to the end of the connecting rod 2231 away from the adjusting cylinder 221. The adjusting plate 2234 is fixedly connected to the end of the adjusting bolt 2233 away from the adjusting cylinder 221. The pressure plate 2235 is provided with a through hole. The end of the connecting rod 2231 away from the adjusting cylinder 221 passes through the through hole and is slidably connected to the pressure plate 2235. One end of the elastic member 2232 away from the adjusting cylinder 221 is fixedly connected to the pressure plate 2235. The connecting plate 2236 is arranged between the pressure plate 2235 and the adjusting plate 2234. One end of the connecting plate 2236 is fixedly connected to the adjusting plate 2234, and the other end is fixedly connected to the pressure plate 2235.

[0059] According to the drilling fluid pressure control device of the embodiment of the present application, by adjusting the connection between the adjusting bolt 2233 and the connecting rod 2231, the distance between the pressure plate 2235 and the end of the connecting rod 2231 close to the adjusting cylinder 221 can be adjusted, that is, the stroke range of the elastic member 2232. The drilling fluid pressure detection and control device can control the position change of the adjusting cylinder 221 according to the pressure change of the drilling fluid in the first chamber Q1.

[0060] It should be noted that when the adjusting bolt 2233 is fully pressed down, the adjusting cylinder 221 still has enough movement range, so that the adjusting cylinder 221 can move to the second position.

[0061] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A drilling fluid pressure detection and control device, characterized in that, Comprising: An infusion tube; And A pressure control component, the pressure control component comprising: A housing, including a first chamber, a pressure relief port and a pressure boosting port communicating with the first chamber, the first chamber communicating with the infusion tube; And An adjusting member disposed in the first chamber of the housing, the adjusting member being capable of moving axially in the first chamber of the housing according to the pressure of the drilling fluid in the first chamber, the adjusting member being configured such that when it moves to a first position, the pressure relief port is opened and the pressure boosting port is closed, or when it moves to a second position, the pressure relief port is closed and the pressure boosting port is opened.

2. The drilling fluid pressure detection and control device according to claim 1, wherein, The adjusting member includes: An adjusting cylinder slidably mounted in the first chamber, the adjusting cylinder including a second chamber and a first opening and a second opening respectively communicating with the second chamber; A one-way valve assembly disposed at the first opening, the one-way valve assembly being configured to conduct from the inside of the second chamber to the outside of the second chamber; and A connecting member connected between the adjusting cylinder and the housing for adjusting the sliding of the adjusting cylinder axially in the first chamber of the housing. Wherein, the drilling fluid pressure detection and control device includes a pressure relief state and a pressure boosting state: The adjusting cylinder is configured to block the pressure boosting port of the housing in the pressure relief state, and the pressure relief port is opened; And in the pressure boosting state, block the pressure relief port of the housing, and the pressure boosting port communicates with the second chamber of the adjusting cylinder through the second opening.

3. The drilling fluid pressure detection and control device according to claim 2, characterized in that, The connecting member includes: A connecting rod; one end of the connecting rod is fixedly connected to the adjusting cylinder, and the other end passes through the housing and is slidably connected to the housing; and An elastic member sleeved on the connecting rod, one end of the elastic member is connected to the end of the connecting rod away from the adjusting cylinder, and the other end is fixedly connected to the housing.

4. The drilling fluid pressure detection and control device according to claim 3, wherein The connecting member further includes: An adjusting bolt threadedly connected to the end of the connecting rod away from the adjusting cylinder; An adjusting plate fixedly connected to the end of the adjusting bolt away from the adjusting cylinder; A pressure plate provided with a through hole, the end of the connecting rod away from the adjusting cylinder passes through the through hole and is slidably connected to the pressure plate, and the end of the elastic member away from the adjusting cylinder is fixedly connected to the pressure plate; and A connecting plate disposed between the pressure plate and the adjusting plate, one end is fixedly connected to the adjusting plate, and the other end is fixedly connected to the pressure plate.

5. The drilling fluid pressure detection and control device according to claim 1, wherein The infusion tube includes a liquid inlet tube and a liquid outlet tube, and the pressure control component communicates with the liquid outlet tube; The drilling fluid pressure detection and control device further includes: a filtering device, the filtering device including a top cover, a bottom cover, a side wall, a liquid inlet and a liquid outlet, the side wall enclosing between the top cover and the bottom cover and forming a filtering chamber, the liquid inlet and the liquid outlet communicating with the filtering chamber, the liquid inlet communicating with the liquid outlet end of the liquid inlet tube, and the liquid outlet communicating with the liquid inlet end of the liquid outlet tube.

6. The drilling fluid pressure detection and control device according to claim 5, characterized in that, The liquid inlet is arranged at a position of the side wall close to the top cover, the liquid outlet is arranged at the top cover, one end of the liquid outlet pipe is passed through the liquid outlet and extends toward the filter chamber, and the cross-sectional area of ​​the filter device gradually decreases from the top cover to the bottom cover along its own axial direction. And / or, the inner surface of the side wall is provided with a flow-guiding thread.

7. The drilling fluid pressure detection and control device according to claim 5, wherein The filter device further comprises an exhaust assembly, wherein the exhaust assembly comprises an exhaust port disposed on the top cover, and the exhaust port is communicated with the filter chamber.

8. The drilling fluid pressure detection and control device according to claim 7, wherein The exhaust assembly also includes an outer shell, a first liquid baffle plate and a second liquid baffle plate. The outer shell has a accommodating chamber, the accommodating chamber is communicated with the filter chamber, the exhaust port is arranged at one end of the outer shell away from the top cover, the liquid outlet pipe is penetrated by the outer shell into the filter chamber, the outer edge of the first liquid baffle plate is sealedly connected to the inner wall of the outer shell, the first liquid baffle plate and the tube wall of the liquid outlet pipe are gap matched, the outer edge of the second liquid baffle plate is sealedly connected to the tube wall of the liquid outlet pipe, the outer edge of the second liquid baffle plate and the inner wall of the outer shell are gap matched, and the first liquid baffle plate and the second liquid baffle plate are arranged in the accommodating chamber at intervals along the axial direction of the filtering device.

9. The drilling fluid pressure detection and control device according to claim 5, characterized in that, The filtering device further comprises a stirring assembly, wherein the stirring assembly comprises: A driving device, the driving device is arranged on the top cover, the driving device is provided with a driving shaft, and the driving shaft passes through the filter chamber; A first rotating disk, fixedly connected to the driving shaft; a second rotating disk, which is in driving connection with the first rotating disk, wherein a side of the second rotating disk facing the top cover and a side of the top cover facing the filter chamber are rotatably engaged with each other, and A stirring rod, one end of which is fixedly connected to a side of the second rotating disk facing away from the top cover.

10. The drilling fluid pressure detection and control device according to claim 9, characterized in that, The stirring assembly also includes: The third turntable is sleeved on the outer tube wall of the liquid outlet pipe close to the liquid inlet, the third turntable is rotationally connected to the outer tube wall of the liquid outlet pipe, and the other end of the stirring rod is rotationally connected to the third turntable.

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