CN-121976765-A - Drilling fluid flow monitoring device and method suitable for slurry runway

Abstract

The invention provides a drilling fluid flow monitoring device and method suitable for a slurry runway, relates to the field of petroleum drilling ground test instruments, and solves the problem that overflow cannot be found in time due to low overflow prediction precision in the existing monitoring method. The device comprises a flow measurement unit (1), wherein the left side and the right side of the flow measurement unit (1) are respectively connected with a flow guide unit (2) and a flow blocking unit (4) through flange plates, the upper part of the flow guide unit (2) is connected with a video monitoring unit (3), the flow measurement unit (1) is an electromagnetic flowmeter and is used for realizing the measurement of outlet displacement, the flow guide unit (2) is used for guiding drilling fluid to flow to the flowmeter, and the flow blocking unit (4) is used for realizing the control of stable flow of the drilling fluid. This drilling fluid flow monitoring devices suitable for mud runway can realize the accurate monitoring in real time of drilling fluid outlet flow, and then realizes the monitoring of drilling fluid overflow, leakage, ensures well control safety.

Inventors

• QI YUE
• LI RUNQI
• ZHAO HANQING
• PANG HAIBO
• YANG ZHIJIAN
• TAN XIAOPENG
• ZHAO QIANG
• ZHANG XIN

Assignees

• 大庆钻探工程有限公司
• 中国石油天然气集团有限公司

Dates

Publication Date

20260505

Application Date

20241025

Claims (16)

1. 1. Drilling fluid flow monitoring device suitable for mud runway, its characterized in that: The device comprises a flow measurement unit (1), wherein the left side and the right side of the flow measurement unit (1) are respectively connected with a flow guiding unit (2) and a flow blocking unit (4) through flange plates, the upper part of the flow guiding unit (2) is connected with a video monitoring unit (3), and the flow measurement unit (1) is an electromagnetic flowmeter and is used for measuring outlet displacement; the flow guiding unit (2) is used for guiding the drilling fluid to flow to the flowmeter; the flow blocking unit (4) is used for realizing the rising and the falling of the liquid level of the drilling fluid and ensuring that the flowmeter is always in a full pipe state.
2. 2. The drilling fluid flow monitoring device for the slurry runway according to claim 1, wherein the flow guiding unit (2) comprises a flow guiding groove (201), a flow guiding plate (202) with a central hole is arranged on the right side of the flow guiding groove body and communicated with the slurry runway, the flow guiding plate is connected with a flange plate (205) through a cylinder (203), and the flow guiding unit (2) is connected with the flange plate at one end of the flow measuring unit (1) through the flange plate (205).
3. 3. The drilling fluid flow monitoring device for a slurry runway according to claim 2 wherein the flow guide groove is a cone for guiding the drilling fluid to the flow meter.
4. 4. The drilling fluid flow monitoring device suitable for the slurry runway according to claim 2 is characterized in that two connecting rods are connected to the opening of the top of the diversion trench (201), a first cross rod (204) and a second cross rod (207), the first cross rod is connected with a video monitoring unit (3) through the connecting rods, and a lifting lug A (206) is connected to the second cross rod.
5. 5. The drilling fluid flow monitoring apparatus for a slurry runway according to claim 4 wherein the first cross bar is positioned in the middle of the trough and the second cross bar (207) is positioned near one end of the right baffle (202).
6. 6. The drilling fluid flow monitoring device for the slurry runway according to claim 4, wherein the video monitoring unit (3) is fixed to a preset hole site in the middle of a first cross rod (204) on the diversion unit (2) through a connecting piece, the video monitoring unit (3) extends out of a wire and is connected to a wireless transmission unit, the wire is transmitted to the wireless signal transmission unit through a data wire, the wireless signal transmission unit transmits signals to a wireless signal receiving unit arranged outside a working board room, the wireless signal receiving unit converts wireless signals into 485 format signals, and then the data are transmitted to a monitoring notebook.
7. 7. The drilling fluid flow monitoring device for the slurry runway according to claim 6, wherein the video monitoring unit (3) is a camera, and the connecting piece is a bolt.
8. 8. The drilling fluid flow monitoring device suitable for the slurry runway according to claim 1, wherein the flow blocking unit (4) comprises a square flow blocking groove body, the flow blocking groove body comprises a front side plate and a rear side plate (402) and a bottom plate at the lower part, the right side of the flow blocking groove body is communicated with the slurry runway, the left side of the flow blocking groove body is connected with a square flow blocking top plate (403) with a center hole, the flow blocking top plate (403) is connected with an outlet flange (404) through a communicating pipe (408), and the flow blocking unit (4) is connected with a right end flange of the flow measuring unit (1) through the port flange (404).
9. 9. The drilling fluid flow monitoring apparatus for a slurry runway according to claim 8 wherein the inner walls of the front and rear side plates (402) are longitudinally opposed to each other and are connected to a pair of rails (410) in which spoilers (406) are insertable.
10. 10. The drilling fluid flow monitoring apparatus as claimed in claim 9, wherein the bottom of the flow blocking plate (406) is zigzag for realizing stable flow of the drilling fluid.
11. 11. The drilling fluid flow monitoring device for the slurry runway according to claim 9, wherein the top of the spoiler (406) is provided with a lug (411), and the spoiler (406) is connected with the other end of the motor (407) belt through the lug to drive the spoiler (406) to move up and down along the track, so that the spoiler can ascend and descend.
12. 12. The drilling fluid flow monitoring apparatus as set forth in claim 11, wherein the motor (407) is a stepper motor.
13. 13. The drilling fluid flow monitoring device for a slurry runway according to claim 12 wherein a shelf is mounted on the upper portion of the flow blocking tank body, and a motor (407) and a lifting lug B (409) are mounted on the shelf.
14. 14. The drilling fluid flow monitoring device suitable for the slurry runway according to claim 1 is characterized in that the flow measuring unit (1) is used for realizing real-time measurement data transmission, data measured by the flow measuring unit are transmitted to the wireless signal transmission unit in a data line mode, the wireless signal transmission unit transmits signals to the wireless signal receiving unit arranged outside a working board room, the wireless signal receiving unit transmits the wireless signal data to a monitoring notebook, control software is installed in the monitoring notebook, and the control software can control forward rotation and reverse rotation of a motor.
15. 15. A drilling fluid flow monitoring apparatus for a mud runway according to claim 14, wherein the flow measuring unit (1) is an electromagnetic flowmeter.
16. 16. A method of drilling fluid flow monitoring using the apparatus of any one of claims 1 to 15 comprising the steps of: the drilling fluid flow monitoring device is placed at the middle and rear parts of the slurry runway, and the diversion unit faces towards the wellhead and faces to the flowing direction of the drilling fluid; After the drilling fluid system starts to circulate, the drilling fluid passes through a wellhead and a slurry runway, and passes through a drilling fluid flow monitoring device, a flow blocking plate is at the uppermost part at the moment, the liquid level of the drilling fluid in the drilling fluid flow monitoring device is checked, the section of the whole drilling fluid flow monitoring device is not fully filled with the liquid level of the drilling fluid at the moment, the section is in a non-full pipe state, and the data measured by the drilling fluid flow monitoring device are inaccurate at the moment; The height of the flow blocking plate is reduced by controlling the switch of the flow blocking unit, the height of the liquid level of the drilling fluid in the drilling fluid flow monitoring device is increased, when the height is increased to the section of the drilling fluid flow monitoring device, the elevation is stopped, whether the drilling fluid flow monitoring device can measure real data is observed, after the liquid level of the drilling fluid is stable, the liquid level is checked in real time through the video monitoring unit, when the circulating drilling fluid flow fluctuates severely, the drilling fluid flow monitoring device can be ensured to be in a full pipe state by adjusting the height of the flow blocking plate, and the accurate measurement of the drilling fluid flow is realized.

Description

Drilling fluid flow monitoring device and method suitable for slurry runway Technical Field The invention relates to the field of petroleum drilling ground test instruments, in particular to a drilling fluid flow monitoring device and method suitable for a slurry runway. Background For shale oil strata with good crack development and connectivity, reservoir associated gas development and high stratum pressure, the drilling and completion process faces a plurality of technical problems of high leakage risk, low aging and the like, and the shale oil drilling speed, efficiency and quality improvement under complex geological conditions are restricted. At present, overflow is mainly predicted by monitoring the liquid level of a mud tank or manually measuring the density and the like, and the prediction method has low precision, and when the overflow leakage occurs more manually. Overflow is predicted by monitoring the liquid level of the mud tank or manually measuring the density, and when the liquid level change is found by an ultrasonic detector on the mud tank, the defects that overflow cannot be found in time, early warning time is delayed and the like exist. Disclosure of Invention The invention provides a drilling fluid flow monitoring device suitable for a slurry runway, aiming at the problem that overflow cannot be found in time due to low overflow accuracy in the existing monitoring method in the background technology. This drilling fluid flow monitoring devices suitable for mud runway can realize the accurate monitoring in real time of drilling fluid outlet flow, and then realizes the monitoring of drilling fluid overflow, leakage, ensures well control safety. The invention also provides a drilling fluid flow monitoring method suitable for the slurry runway. The invention solves the problems by adopting the technical scheme that the drilling fluid flow monitoring device suitable for the slurry runway comprises a flow measuring unit, wherein the left side and the right side of the flow measuring unit are respectively connected with a flow guiding unit and a flow blocking unit through flange plates; the flow measuring unit is an electromagnetic flowmeter and is used for measuring the outlet displacement; the flow guiding unit is used for guiding the drilling fluid to flow to the flowmeter; the flow blocking unit is used for realizing the rising and the falling of the liquid level of the drilling fluid and ensuring that the flowmeter is always in a full pipe state. The flow guiding unit comprises a flow guiding groove, a flow guiding plate with a central hole is arranged on the right side of the flow guiding groove body and is communicated with a slurry runway, the flow guiding plate is connected with a flange plate through a cylinder, and the flow guiding unit is connected with a flange plate at one end of the flow measuring unit through the flange plate. Furthermore, the diversion trench body is a conical body, so that the drilling fluid can be conveniently guided to flow to the flowmeter. Further, two connecting rods are connected to the opening of the top of the diversion trench, a first cross rod and a second cross rod are connected to the first cross rod, the first cross rod is connected with the video monitoring unit through the connecting rods, and a lifting lug is connected to the second cross rod. Further, the first cross bar is located at the middle of the groove body, and the second cross bar is located at one end close to the right side guide plate. The video monitoring unit extends out of a wire and is connected to the wireless transmission unit, the wire is transmitted to the wireless signal transmission unit through the data wire, the wireless signal transmission unit transmits signals to the wireless signal receiving unit arranged on the outer side of the working board house, the wireless signal receiving unit converts the wireless signals into 485 format signals, and then the data are transmitted to the monitoring notebook. Further, the video monitoring unit is a camera. The flow blocking unit comprises a flow blocking groove body, wherein the flow blocking groove body comprises a front side plate, a rear side plate and a bottom plate, the bottom plate is arranged at the lower part of the flow blocking groove body, the right side of the flow blocking groove body is communicated with a slurry runway, the left side of the flow blocking groove body is connected with a square flow blocking top plate with a center hole, the flow blocking top plate is connected with an outlet flange through a communication pipe, and the flow blocking unit is connected with a flange at the right end of the flow measuring unit through the outlet flange. Furthermore, the inner walls of the front side plate and the rear side plate are longitudinally and oppositely connected with a pair of rails, and flow blocking plates can be inserted into the rails. Furthermore, the bottom of the flow blocking plate is zigzag a