Erasing device for oil well mouth crude oil moisture content on-line monitor

Abstract

The utility model belongs to the technical field of measuring instruments in the petroleum industry, and particularly relates to an oil well mouth crude oil moisture content online monitor erasing device which comprises a lower shell of a monitor, a threaded connector is arranged at the bottom of the lower shell, a detection probe is fixedly connected in the lower shell, an erasing assembly is installed in the lower shell, and the detection probe is fixedly connected with the erasing assembly. The erasing assembly comprises a piston ring and a sealing seat; crude oil enters the detection cavity through the circulation opening, the detection probe detects moisture in the crude oil, and after detection is completed, the driving assembly drives the piston ring to slide downwards, so that the piston ring scrapes oil stains or wax on the surface of the detection probe.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments in the petroleum industry, in particular to an erasing device for an online monitoring instrument for the water content of crude oil at a wellhead of an oil well. Background Art

[0002] The water content of crude oil at the wellhead is not only an important reservoir data of the oil well, but also an important production parameter. It is of great significance and practical value for determining the water-producing and oil-producing strata, estimating production and predicting the development life of the oil well, as well as the production quality control of the oil field, oil well status detection, cost reduction and automation of oil production management.

[0003] At present, due to the long sampling time, high labor intensity, strong randomness, large errors and low efficiency of the manual sampling and testing method, the oil field field work has gradually begun to use the oil wellhead crude oil water content online monitor to measure the oil water content; in the production operation process, due to the use of cluster well group single pipe unheated (wellhead dosing) oil collection process, when the water content online monitor is operated in winter, the wellhead temperature is too low, the wax deposition rate in the oil collection pipeline is fast, and it is easy to hang wax on the surface of the water content online monitor probe, causing the water content monitoring data to be distorted, affecting the oil wellhead crude oil water content measurement. Therefore, in the actual production of oil field wellhead unheated oil collection process, how to take appropriate measures to improve the surface wax hanging phenomenon of the water content online detector probe, so that the detection of water content data is accurate and authentic, and improve the oil field production management level, is of great significance to the smooth operation of actual industrial production; therefore, in view of the above problems, an oil wellhead crude oil water content online monitor erasing device is proposed. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the utility model proposes an erasing device for an online monitor of the water content of crude oil at the wellhead of an oil well.

[0005] The utility model adopts the following technical scheme to solve the technical problem: the utility model discloses an erasing device for an online monitor of the water content of crude oil at the wellhead of an oil well, comprising a lower shell of the monitor, a threaded joint is provided at the bottom of the lower shell, a detection probe is fixedly connected to the interior of the lower shell, an erasing assembly is installed inside the lower shell, the erasing assembly comprises a piston ring and a sealing seat, the piston ring is sleeved on the outside of the detection probe, and the piston ring is installed inside the lower shell, a driving assembly is installed above the piston ring, the sealing seat is located at the bottom of the detection probe, and the sealing seat is fixedly connected to the lower shell, the sealing seat divides the internal space of the lower shell into an upper detection chamber and a lower circulation chamber, a plurality of circulation ports are provided on the surface of the sealing seat, the threaded joint is connected to the detection port of the crude oil pipeline for installation, when working, the crude oil enters the interior of the detection chamber from the circulation port, so that the detection probe detects the water content in the crude oil, and after the detection is completed, the driving assembly drives the piston ring to slide downward, so that the piston ring scrapes off the oil stains or wax hanging on the surface of the detection probe.

[0006] Preferably, a plurality of cleaning heads are fixedly connected to the bottom of the piston ring, and the cleaning heads are located directly above the circulation openings. The cleaning heads are inserted into the interior of the circulation openings for cleaning, thereby preventing the circulation openings from being clogged by wax.

[0007] Preferably, the cleaning head consists of a cylindrical connecting end and a truncated cone-shaped cleaning end, and the diameter of the connecting end is the same as the diameter of the flow port.

[0008] Preferably, a sealing ring is provided on the outer sleeve of the connecting end. When the monitor is idle, the piston ring gradually descends until it fits the sealing seat to push the crude oil in the detection cavity out, and the connecting end is inserted into the interior of the flow port, and the flow port and the sealing seat are blocked by the cooperation of the sealing ring, so that the detection probe does not contact the crude oil when idle, avoiding the problem of wax hanging.

[0009] Preferably, the sealing seat is configured to be convex.

[0010] Preferably, a filter screen is fixedly connected to the lower side wall of the lower shell, and solid particle impurities can be filtered through the filter screen.

[0011] Preferably, the driving assembly includes a plurality of connecting rods and air holes. The connecting rod is fixedly mounted on the top of the piston ring and passes through the lower shell and extends to the outside. The upper shell is driven to slide along the lower shell through the movement of the electric push rod, so that the connecting rod pushes the piston ring to slide to realize the automatic cleaning function of the detection probe.

[0012] Preferably, the top end of the connecting rod is fixedly connected to an upper shell, and the upper shell is sleeved on the outside of the lower shell. The air holes are respectively opened at the top ends of the lower shell and the upper shell. The air circulation inside the detection cavity above the piston ring is maintained through the air holes to avoid negative pressure.

[0013] Preferably, electric push rods are fixedly connected to both sides of the top of the upper shell, and the driving end of the electric push rod is fixedly connected to the lower shell.

[0014] The utility model is beneficial in that:

[0015] 1. The utility model allows crude oil to enter the interior of the detection chamber from the flow port, so that the detection probe detects the moisture in the crude oil. After the detection is completed, the driving component drives the piston ring to slide downward, so that the piston ring scrapes off the oil stains or wax on the surface of the detection probe.

[0016] 2. The utility model pushes the crude oil in the detection cavity out by gradually lowering the piston ring until it fits the sealing seat, and inserts the connecting end into the flow port, and blocks the flow port and the sealing seat through the cooperation of the sealing ring, so that the detection probe does not contact the crude oil when idle, avoiding the problem of wax hanging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional view of the lower shell and the upper shell of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the erasing component of the utility model;

[0021] Figure 4 For this utility model Figure 3 A structural diagram of ;

[0022] Figure 5 This is a schematic diagram of the structure of the drive assembly of the utility model.

[0023] In the figure: 1. lower shell; 2. detection probe; 3. erasing assembly; 31. piston ring; 32. sealing seat; 33. flow port; 34. cleaning head; 35. sealing ring; 341. connecting end; 342. cleaning end; 4. driving assembly; 41. connecting rod; 42. upper shell; 43. electric push rod; 44. air vent; 5. filter. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0025] See also Figure 1-4 As shown, an erasing device for an online monitor of water content in crude oil at the wellhead of an oil well, comprising a lower shell 1 of the monitor, a threaded joint is provided at the bottom of the lower shell 1, a detection probe 2 is fixedly connected to the interior of the lower shell 1, an erasing component 3 is installed inside the lower shell 1, the erasing component 3 comprises a piston ring 31 and a sealing seat 32, the piston ring 31 is sleeved on the outside of the detection probe 2, and the piston ring 31 is installed inside the lower shell 1, a driving component 4 is installed above the piston ring 31, the sealing seat 32 is located at the bottom of the detection probe 2, and the sealing seat 32 is fixedly connected to the lower shell 1, the sealing seat 32 divides the internal space of the lower shell 1 into an upper detection chamber and a lower circulation chamber, a plurality of circulation ports 33 are provided on the surface of the sealing seat 32, the threaded joint is connected to the detection port of the crude oil pipeline for installation, when working, the crude oil enters the interior of the detection chamber from the circulation port 33, so that the detection probe 2 detects the water content in the crude oil, and after the detection is completed, the driving component 4 drives the piston ring 31 to slide downward, so that the piston ring 31 scrapes off the oil stains or wax hanging on the surface of the detection probe 2.

[0026] A plurality of cleaning heads 34 are fixedly connected to the bottom of the piston ring 31 , and the cleaning heads 34 are located directly above the circulation port 33 . The cleaning heads 34 are inserted into the circulation port 33 for cleaning, so as to prevent the circulation port 33 from being blocked by wax.

[0027] The cleaning head 34 is composed of a cylindrical connecting end 341 and a truncated cone-shaped cleaning end 342 . The diameter of the connecting end 341 is the same as the diameter of the flow port 33 .

[0028] A sealing ring 35 is sleeved on the outside of the connection end 341. When the monitor is idle, the piston ring 31 gradually descends until it fits the sealing seat 32, pushing the crude oil in the detection cavity out, and the connection end 341 is inserted into the inside of the flow port 33, and the flow port 33 and the sealing seat 32 are blocked by the cooperation of the sealing ring 35, so that the detection probe 2 does not contact the crude oil when idle, avoiding the problem of wax hanging.

[0029] The sealing seat 32 is configured to be convex.

[0030] A filter screen 5 is fixedly connected to the lower side wall of the lower shell 1 , and solid particle impurities can be filtered through the filter screen 5 . Example

[0031] For comparison with Example 1, please refer to Figure 5 As shown, the utility model provides another embodiment, the driving assembly 4 includes a plurality of connecting rods 41 and air holes, the connecting rod 41 is fixedly installed on the top of the piston ring 31, and the connecting rod 41 passes through the lower shell 1 and extends to the outside, and the upper shell 42 is driven to slide along the lower shell 1 through the movement of the electric push rod 43, so that the connecting rod 41 pushes the piston ring 31 to slide to realize the automatic cleaning function of the detection probe 2.

[0032] The top of the connecting rod 41 is fixedly connected to the upper shell 42, and the upper shell 42 is sleeved on the outside of the lower shell 1. Air holes are respectively opened at the top of the lower shell 1 and the upper shell 42. Through the air hole 44, the air circulation inside the detection cavity above the piston ring 31 is maintained to avoid the generation of negative pressure.

[0033] Electric push rods 43 are fixedly connected to both sides of the top of the upper shell 42 , and the driving end of the electric push rod 43 is fixedly connected to the lower shell 1 .

[0034] Through the personnel in this field, all the electrical components in this case are connected to the power supply adapted thereto through wires, and according to the actual situation, a suitable controller should be selected to be electrically connected to the electric push rod 43, and the controller is electrically connected to the crude oil water content analyzer, and the crude oil water content analyzer is electrically connected to the detection probe 2 to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the working sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0035] Working principle: connect the threaded joint to the detection port of the crude oil pipeline for installation. During operation, the crude oil enters the detection chamber from the flow port 33, so that the detection probe 2 detects the moisture in the crude oil. After the detection is completed, the driving component 4 drives the piston ring 31 to slide downward, so that the piston ring 31 scrapes off the oil stains or wax on the surface of the detection probe 2.

[0036] When the monitor is idle, the piston ring 31 gradually descends until it fits the sealing seat 32, pushing the crude oil in the detection chamber out, and the connecting end 341 is inserted into the flow port 33, and the flow port 33 and the sealing seat 32 are blocked by the cooperation of the sealing ring 35, so that the detection probe 2 does not contact the crude oil when idle, avoiding the problem of wax hanging.

[0037] The upper shell 42 is driven to slide along the lower shell 1 by the movement of the electric push rod 43, so that the connecting rod 41 pushes the piston ring 31 to slide to realize the automatic cleaning function of the detection probe 2, and the air vent 44 keeps the air circulation inside the detection cavity above the piston ring 31 to avoid the generation of negative pressure.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. 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 utility model. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An erasing device for an online monitor of water content in crude oil at the wellhead of an oil well, comprising a lower housing (1) of the monitor, characterized in that: A threaded joint is provided at the bottom of the lower shell (1); a detection probe (2) is fixedly connected to the interior of the lower shell (1); an erasing assembly (3) is installed inside the lower shell (1); the erasing assembly (3) comprises a piston ring (31) and a sealing seat (32); the piston ring (31) is sleeved on the outside of the detection probe (2) and installed inside the lower shell (1); a driving assembly (4) is installed above the piston ring (31); the sealing seat (32) is located at the bottom of the detection probe (2) and is fixedly connected to the lower shell (1); the sealing seat (32) divides the internal space of the lower shell (1) into an upper detection chamber and a lower circulation chamber; a surface of the sealing seat (32) is provided with a plurality of circulation openings (33).

2. The erasing device for the online monitoring instrument for the water content of crude oil at the wellhead of an oil well according to claim 1 is characterized in that: A plurality of cleaning heads (34) are fixedly connected to the bottom of the piston ring (31), and the cleaning heads (34) are located directly above the flow opening (33).

3. The erasing device for the online monitoring instrument of the water content of crude oil at the wellhead of an oil well according to claim 2 is characterized in that: The cleaning head (34) is composed of a cylindrical connecting end (341) and a truncated cone-shaped cleaning end (342); the diameter of the connecting end (341) is the same as the diameter of the flow port (33).

4. The erasing device for the online monitoring instrument for the water content of crude oil at the wellhead of an oil well according to claim 3 is characterized in that: The connection end (341) is sleeved externally with a sealing ring (35).

5. The erasing device for the online monitoring instrument of the water content of crude oil at the wellhead of an oil well according to claim 1 is characterized in that: The sealing seat (32) is configured to be convex.

6. The erasing device for the online monitoring instrument of the water content of crude oil at the wellhead of an oil well according to claim 1 is characterized in that: A filter screen (5) is fixedly connected to the lower side wall of the lower shell (1).

7. The erasing device for the online monitoring instrument of the water content of crude oil at the wellhead of an oil well according to claim 1 is characterized in that: The driving assembly (4) comprises a plurality of connecting rods (41) and air vents (44); the connecting rods (41) are fixedly mounted on the top of the piston ring (31); and the connecting rods (41) penetrate the lower housing (1) and extend to the outside.

8. The erasing device for the online monitoring instrument for the water content of crude oil at the wellhead of an oil well according to claim 7 is characterized in that: The top end of the connecting rod (41) is fixedly connected to an upper shell (42), the upper shell (42) is sleeved on the outside of the lower shell (1), and the air holes (44) are respectively provided at the top ends of the lower shell (1) and the upper shell (42).

9. The erasing device for the online monitoring instrument for the water content of crude oil at the wellhead of an oil well according to claim 8, characterized in that: Electric push rods (43) are fixedly connected to both sides of the top of the upper shell (42), and the driving end of the electric push rod (43) is fixedly connected to the lower shell (1).

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