Quantitative sampling and guiding device for drilling fluid at outlet

Abstract

The utility model relates to the technical field of drilling fluid sampling and measuring devices, in particular to an outlet drilling fluid quantitative sampling and flow guiding device which comprises a buffer tank and a sampling and detecting device, the sampling and detecting device is installed on the front side of the buffer tank and comprises a communicating pipe, a flow guiding pipe, a sampling pipe and a liquid outlet pipe, and the rear end of the communicating pipe is communicated with the buffer tank. The upper side of the communicating pipe is provided with at least one liquid inlet, the lower end of the communicating pipe is connected with a diversion pipe, and the outlet end of the diversion pipe is connected with a sampling pipe. The device is reasonable and compact in structure and convenient to use, the sampling device is arranged on the outer side of the buffer tank, the sampling pipe is arranged, the sensor can detect drilling fluid parameters in the sampling pipe, and the problems that when detection is conducted in the buffer tank, the sensor cannot achieve quantitative measurement due to irregular liquid level flowing and pipeline height limitation are solved. And the drilling fluid discharged by the gas-liquid separator is inconvenient to collect and detect.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling fluid sampling and measuring devices, in particular to an outlet drilling fluid quantitative sampling and diversion device. Background Art

[0002] During the oil drilling and development process, the performance parameters of the outlet drilling fluid are monitored to determine whether engineering anomalies, oil and gas content, etc. have occurred. At present, various sensors are installed in the buffer tank to monitor the performance parameters of the drilling fluid. There are four deficiencies in use. First, due to the irregular flow of the drilling fluid, the sensor cannot meet the optimal working conditions; second, the displacement, flow rate and flow rate of the drilling fluid are different, resulting in different flow rates and pressures of the sensor, and the measured parameters are different from the actual; third, the buffer tank capacity (size) is different and the overhead pipe angle is different, resulting in the sensor measurement environment cannot achieve quantitative measurement; fourth, during pressure-controlled drilling or throttling circulation, the drilling fluid needs to be separated by gas-liquid separator, and the gas-liquid separator, as a well control equipment, has certain requirements for the outlet height. The drilling fluid outlet pipe after gas-liquid separation cannot be installed on the buffer tank according to the standard, resulting in the drilling fluid having no buffering effect, and even unable to flow into the buffer tank, resulting in the sensor being unable to measure effectively and causing damage to the sensor. The above deficiencies are likely to cause deviations between the measured parameters and the actual, affecting the monitoring of engineering anomalies and the discovery and evaluation of oil and gas displays. Summary of the invention

[0003] The utility model provides an outlet drilling fluid quantitative sampling and diversion device, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that the results of measuring drilling fluid parameters through sensors in the existing buffer tank are different or even inconvenient to measure.

[0004] The technical scheme of the utility model is realized through the following measures: an outlet drilling fluid quantitative sampling and diversion device, comprising a buffer tank and a sampling and detection device, a sampling and detection device is installed on the front side of the buffer tank, the sampling and detection device comprises a connecting pipe, a diversion pipe, a sampling pipe, and a liquid outlet pipe, the rear end of the connecting pipe is connected with the buffer tank, at least one liquid inlet is arranged on the upper side of the connecting pipe, the lower end of the connecting pipe is connected with the diversion pipe, the outlet end of the diversion pipe is connected with the sampling pipe, the outlet end of the sampling pipe is connected with the liquid outlet pipe, the liquid outlet pipe is connected with the buffer tank, and a measuring device is installed on the sampling pipe to measure the drilling fluid in the sampling pipe.

[0005] The following are further optimizations and / or improvements to the above utility model technical solution:

[0006] Preferably, the buffer tank has a triangular notch on the front side, a placement platform is provided at the notch, and two liquid inlets are provided on the connecting pipe. The drilling fluid outlet end of the elevated pipe is placed on the placement platform and connected with the liquid inlet at the rear, and the liquid inlet at the front is connected with the drilling fluid outlet end of the gas-liquid separator. The heights of the two liquid inlets are determined according to the heights of the elevated pipe and the gas-liquid separator pipeline.

[0007] Preferably, the flow guide tube and the sampling tube are coaxial and the angle between them and the horizontal direction is 9° to 15°.

[0008] Preferably, the angle between the flow guide tube and the sampling tube and the horizontal direction is 9°.

[0009] Preferably, ball valves are provided on the flow guide pipe and the liquid outlet pipe at the inlet and outlet ends of the sampling tube.

[0010] Preferably, a filter screen is installed at the inlet end of the guide pipe.

[0011] The utility model has a reasonable and compact structure and is easy to use. The sampling device is arranged outside the buffer tank and a sampling tube is arranged. The sensor can detect the drilling fluid parameters in the sampling tube, which solves the problems of irregular flow of the liquid surface during detection in the buffer tank, the inability of the sensor to achieve quantitative measurement due to pipeline height limitation, and the inconvenience of collecting and detecting the drilling fluid discharged from the gas-liquid separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model.

[0013] Attached Figure 2 For attachment Figure 1 Schematic diagram of the top view structure.

[0014] Attached Figure 3 For attachment Figure 1 Schematic diagram of the enlarged top view of the filter structure.

[0015] The codes in the attached drawings are: 1 is a buffer tank, 2 is a placement platform, 3 is a connecting pipe, 4 is a guide pipe, 5 is a sampling tube, 6 is a liquid outlet pipe, 7 is a liquid inlet, 8 is a ball valve, 9 is a filter screen, and a is an angle. DETAILED DESCRIPTION

[0016] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0017] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0018] The present invention is further described below in conjunction with the embodiments and drawings:

[0019] Embodiment 1: As attached Figure 1 , 2 As shown in Figure 3, the outlet drilling fluid quantitative sampling and diversion device includes a buffer tank 1 and a sampling and detection device. The sampling and detection device is installed on the front side of the buffer tank 1. The sampling and detection device includes a connecting pipe 3, a diversion pipe 4, a sampling pipe 5, and a liquid outlet pipe 6. The rear end of the connecting pipe 3 is connected to the buffer tank 1. At least one liquid inlet 7 is provided on the upper side of the connecting pipe 3. The lower end of the connecting pipe 3 is connected to the diversion pipe 4. The outlet end of the diversion pipe 4 is connected to the sampling pipe 5. The outlet end of the sampling pipe 5 is connected to the liquid outlet pipe 6. The liquid outlet pipe 6 is connected to the buffer tank 1. A measuring device is installed on the sampling pipe 5 to measure the drilling fluid in the sampling pipe 5.

[0020] The sensor can be connected to the sampling tube 5 as required. The gas-liquid separator outlet or the overhead pipe outlet is connected from the liquid inlet 7, and the drilling fluid is introduced into the sampling tube 5 at a certain speed through the guide tube 4. The drilling fluid flow rate, pressure and flow rate are kept constant in the sampling tube 5 to meet the optimal measurement conditions of the sensor, and the problems of unstable and inaccurate measurement results on the buffer tank 1 and the inconvenience of detecting the drilling fluid after gas-liquid separation are fundamentally solved, and more accurate and stable drilling fluid parameters can be obtained. After passing through the sampling tube 5, the drilling fluid enters the buffer tank 1 from the liquid outlet pipe 6. When the flow rate of the liquid inlet 7 is too large, it will also flow into the buffer tank 1 through the rear end of the connecting pipe 3 to avoid overflow.

[0021] The above outlet drilling fluid quantitative sampling and diversion device can be further optimized and / or improved according to actual needs:

[0022] Embodiment 2: As attached Figure 1 , 2 As shown, the buffer tank 1 has a triangular notch on the front side, a placement platform 2 is provided at the notch, and two liquid inlets 7 are provided on the connecting pipe 3. The drilling fluid outlet end of the elevated pipe is placed on the placement platform 2 and connected with the liquid inlet 7 at the rear, and the liquid inlet 7 at the front is connected with the drilling fluid outlet end of the gas-liquid separator. The heights of the two liquid inlets 7 are determined according to the heights of the elevated pipe and the gas-liquid separator pipeline.

[0023] Since the size of the buffer tank 1 and the height angle of the elevated pipe are not easy to change, a placement platform 2 is set up to facilitate the passage of the elevated pipe and meet the height requirements of the elevated pipe. The height of the liquid inlet 7 at the rear is lower than that of the liquid inlet 7 at the front. At the same time, two liquid inlets 7 are set up to fix two pipelines at one time without frequent replacement. The two pipelines discharge drilling fluid for measurement at different times.

[0024] Embodiment 3: As attached Figure 1 , 2As shown, the flow guide pipe 4 and the sampling pipe 5 are coaxial and the angle a with the horizontal direction is 9° to 15°. The inclined flow guide pipe 4 can guide the flow by gravity, and when the flow rate of drilling fluid is small, it can still flow into the sampling pipe 5 for measurement.

[0025] Embodiment 4: As attached Figure 1 , 2 As shown, the angle a between the flow guide tube 4 and the sampling tube 5 and the horizontal direction is 9°. When the angle a is set to 9°, the flow rate and flow rate can better meet the detection requirements.

[0026] Embodiment 5: As attached Figure 1 , 2 As shown, ball valves 8 are provided on the flow guide pipe 4 and the liquid outlet pipe 6 at the inlet and outlet ends of the sampling tube 5. After the front and rear end ball valves 8 are closed, the sampling tube 5 and the sensor can be installed and maintained without stopping the drilling.

[0027] Embodiment 6: As attached Figure 1 , 2 As shown in Figure 3, a filter screen 9 is installed at the inlet end of the flow guide pipe 4. The filter screen 9 is used to filter impurities in the drilling fluid to avoid clogging the subsequent pipeline.

[0028] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A device for quantitative sampling and diversion of drilling fluid at an outlet, characterized in that It includes a buffer tank and a sampling detection device. The sampling detection device is installed on the front side of the buffer tank. The sampling detection device includes a connecting pipe, a guide pipe, a sampling pipe, and a liquid outlet pipe. The rear end of the connecting pipe is connected to the buffer tank. At least one liquid inlet is provided on the upper side of the connecting pipe. The lower end of the connecting pipe is connected to the guide pipe. The outlet end of the guide pipe is connected to the sampling pipe. The outlet end of the sampling pipe is connected to the liquid outlet pipe. The liquid outlet pipe is connected to the buffer tank. A measuring device is installed on the sampling pipe to measure the drilling fluid in the sampling pipe.

2. The outlet drilling fluid quantitative sampling and diversion device according to claim 1 is characterized in that The buffer tank is provided with a triangular notch on the front side, a placement platform is provided at the notch, and two liquid inlets are provided on the connecting pipe. The drilling fluid outlet end of the elevated pipe is placed on the placement platform and connected with the liquid inlet at the rear, and the liquid inlet at the front is connected with the drilling fluid outlet end of the gas-liquid separator. The heights of the two liquid inlets are determined according to the heights of the elevated pipe and the gas-liquid separator pipeline.

3. The outlet drilling fluid quantitative sampling and diversion device according to claim 1 or 2, characterized in that The flow guide tube and the sampling tube are coaxial and have an angle of 9° to 15° with the horizontal direction.

4. The outlet drilling fluid quantitative sampling and diversion device according to claim 3 is characterized in that The included angle between the flow guide tube and the sampling tube and the horizontal direction is 9°.

5. The outlet drilling fluid quantitative sampling and diversion device according to claim 1, 2 or 4, characterized in that Ball valves are provided on the flow guide pipe and the liquid outlet pipe at the inlet and outlet ends of the sampling pipe.

6. The outlet drilling fluid quantitative sampling and diversion device according to claim 3 is characterized in that Ball valves are provided on the flow guide pipe and the liquid outlet pipe at the inlet and outlet ends of the sampling pipe.

7. The outlet drilling fluid quantitative sampling and diversion device according to claim 1, 2, 4 or 6, characterized in that A filter is installed at the inlet end of the guide pipe.

8. The outlet drilling fluid quantitative sampling and diversion device according to claim 3, characterized in that A filter is installed at the inlet end of the guide pipe.

9. The outlet drilling fluid quantitative sampling and diversion device according to claim 5, characterized in that A filter is installed at the inlet end of the guide pipe.

Images