WO2022148325A1

WO2022148325A1 - Thermal separation apparatus for recycling oil-based drilling waste of offshore oilfield

Info

Publication number: WO2022148325A1
Application number: PCT/CN2021/143965
Authority: WO
Inventors: 方健; 车连发; 阚子健; 徐龙波; 魏子路
Original assignee: 中海油天津化工研究设计院有限公司
Priority date: 2021-01-11
Filing date: 2021-12-31
Publication date: 2022-07-14
Also published as: CN112843758A

Abstract

A thermal separation apparatus for recycling oil-based drilling waste of an offshore oilfield, comprising a servo motor (2), a thermal separation bin body (5), a mixing bin (13), a second feed pipe (16), and a rotating shaft (17). A cover body (4) is fixedly installed on one side of the thermal separation bin body (5) by means of a fastening screw (1). A ceramic wear-resistant arc plate (7) is fixedly installed below the inner wall of the thermal separation bin body (5). A hole is formed in the middle of one side of the cover body (4) and a second bearing (18) is embedded in the hole. A first bearing (8) is embedded in one side of the inner wall of the thermal separation bin body (5). The inner wall of the first bearing (8) and the inner wall of the second bearing (18) are fixedly connected to both ends of a rotating shaft (17), respectively. A hole is formed in the bottom of the thermal separation bin body (5) and communicates with one end of the second feed pipe (16). The other end of the second feed pipe (16) communicates with the bottom of the mixing bin (13). The top of the mixing bin (13) communicates with a first feed pipe (9), and a liquid level sensing apparatus (12) is embedded in one side of the top of the mixing bin (13).

Description

A thermal separation device for recycling oil-based drilling waste in offshore oil fields

technical field

The invention relates to the technical field of recycling and utilization of petroleum wastes, in particular to a thermal separation device for recycling and utilization of oil-based drilling wastes in marine oil fields.

Background technique

In the past decade or two, China has attached great importance to marine environmental protection. On September 20, 1990, the State Oceanic Administration of China issued the "Measures for the Implementation of the Regulations on Environmental Protection Management of Offshore Petroleum Exploration and Development". Article 15 of the Measures stipulates that when oil-based mud needs to be used, low-toxicity oil-based mud should be used; effective technical measures should be taken to fully separate drilling cuttings from mud; oil-based mud must be recovered and not discharged into the sea; When the oil content in drill cuttings exceeds 15% by weight, discharge into the sea is prohibited. Drilling cuttings with an oil content of less than 15% (by weight) are indeed difficult to recover. With the approval of the competent department of the sea area, they can be discharged into the sea, but a sewage fee shall be paid. Strict environmental protection laws and regulations and drilling fluid and waste discharge standards have restricted offshore drilling and drilling fluid companies and brought huge economic pressure to offshore drilling and drilling fluid companies. Therefore, foreign drilling and drilling fluid companies have taken various technical measures to meet the requirements of environmental laws and regulations. According to relevant statistics, in the development of petroleum science and technology in the 1990s, 80% of the exploration and development research budget of the American Petroleum Institute (API) was spent on projects related to environmental protection.

However, in the process of frictionally heating oil-based drilling waste and forming mixed steam in the currently used thermal separation device, the inner wall of the thermal separation device wears greatly after long-term friction, and it is difficult to replace, resulting in excessive maintenance costs. At the same time, it is difficult to control the amount of material injected when the thermal separation device is injected, which leads to excessive injection of material in the thermal separation device, which may easily lead to excessive workload of the thermal separation device, and also makes it difficult for oil-based drilling waste to be quickly removed. Evaporation, so that the work efficiency cannot be improved. Therefore, a thermal separation device for recycling and utilization of oil-based drilling waste in offshore oil fields is required to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a thermal separation device for recycling and utilization of oil-based drilling wastes in offshore oil fields, which has the advantages of convenient maintenance and automatic adjustment of the feeding amount, and solves the problems of excessive maintenance cost of the thermal separation device and difficult control of the feeding amount. .

In order to achieve the above purpose, the present invention provides the following technical solutions: a thermal separation device for recycling oil-based drilling waste in an offshore oil field, comprising a servo motor, a thermal separation bin body, a solenoid valve, a mixing bin, a second feed pipe, and a rotating shaft and the main body of the oil condensing bin, a cover body is fixedly installed on one side of the heat separation bin body by tightening screws, a ceramic wear-resistant arc-shaped plate is fixedly installed under the inner wall of the heat separation bin body, and one side of the cover body is open in the middle. A second bearing is embedded and installed in the hole, and a first bearing is embedded and installed on one side of the inner wall of the heat separation bin body. The inner wall of the first bearing and the inner wall of the second bearing are respectively fixedly connected to both ends of the rotating shaft. The second bearing extends out and is rotatably connected to one side of the servo motor. The bottom end of the heat separation bin body is open and installed in communication with one end of the second feed pipe, and the other end of the second feed pipe is connected to the bottom end of the mixing bin. The top of the mixing silo is connected and installed with a first feeding pipe, and one side of the top of the mixing silo is opened and a sealing ring is embedded and installed, and a liquid level sensing device is embedded and installed in the sealing ring.

Preferably, the top of the heat separation silo body is raised and installed in communication with one end of the first gas delivery pipe, the other end of the first gas delivery pipe is installed in communication with one side of the upper surface of the oil condensation silo body, and the other side of the upper surface of the oil condensation silo body is provided with Opening, the oil condensation tank body below the opening on the upper surface of the oil condensation tank body is fixedly installed with a partition plate, a hole is opened in the middle of one side of the partition plate, and a filter plate is movably installed in the hole on the partition plate. The top end is fixedly connected with a rubber gasket, the upper surface of the rubber gasket is fixedly installed with a pull ring, the oil condensation chamber body and the heat separation chamber body are connected and installed on the upper side of the side facing away from the heat separation chamber body, and the oil condensation chamber body is close to the heat separation chamber. A discharge pipe is connected and installed at the bottom of the side, the lower surface of the inner wall of the discharge pipe and the lower surface of the partition plate are at the same level, and a temperature gauge is embedded in the front of the outer wall of the heat separation bin body.

Preferably, the surface of the rotating shaft is distributed at equal distances in an annular array and is fixedly connected with friction rods, and one end of the friction rods away from the rotating shaft is in contact with the inner wall of the ceramic wear-resistant arc plate but is not fixedly connected.

Preferably, the servo motor is fixedly installed on the side of the cover away from the body of the thermal separation bin through a support frame.

Preferably, a screw conveying device is fixedly installed on the second feeding pipe.

Preferably, the liquid level sensing device is electrically connected to a solenoid valve, the solenoid valve is fixedly installed on the first feeding pipe, and the bottom end of the liquid level sensing device and the top end of the ceramic wear-resistant arc plate are at the same level.

Compared with the prior art, the beneficial effects of the present invention are as follows:

In the present invention, the cover body is provided, and the cover body is fixedly connected with the heat separation chamber body by tightening screws, so that the disassembly and assembly of the heat separation chamber body is more convenient. The shaped plate is taken out and replaced, so as to facilitate maintenance and reduce maintenance costs.

In the present invention, the liquid level sensing device is arranged, the bottom end of the liquid level sensing device and the ceramic wear-resistant arc-shaped plate are set on the same horizontal plane, and the liquid level sensing device is electrically connected with the electromagnetic valve, and the oil-based drilling waste in the silo is mixed. When reaching the bottom of the liquid level sensing device, the solenoid valve automatically closes the first feed pipe, and the oil-based drilling waste flows into the heat separation bin body through the second feed pipe under the action of pressure, and reaches the ceramic wear-resistant arc plate. When the top is stopped, the injection is stopped, and the effect of automatic adjustment of the feeding amount is achieved.

In the present invention, the heat separation bin body is arranged, the top of the heat separation bin body is set as an upwardly raised structure, and the bottom end of the raised structure is higher than the top of the ceramic wear-resistant arc plate, so that the oil-based drilling waste in the heat separation bin body has the highest liquid level. It is lower than the bottom end of the uplift structure, so as to maximize the liquid level cross-sectional area of the oil-based drilling waste in the thermal separation bin body, thereby improving the steam generation efficiency of the oil-based drilling waste, and the generation of oil-based drilling waste. A large amount of steam from the heat separation chamber can go upward along the inner wall of the heat separation bin body and be discharged through the first gas delivery pipe, so as to achieve the effect of improving the steam generation efficiency.

In the present invention, a first gas transmission pipe is arranged, and the heat separation bin body and the oil condensation bin body are connected and installed through the first gas transport pipe, and the generated mixed steam is transported into the oil condensation bin body through the first gas transport pipe, and is installed in the oil condensation bin body through a movable installation. The filter plate in the oil condensation tank body filters the mixed steam, so that the solid dust mixed in the mixed steam is adsorbed on the filter plate. At the same time, the heavy oil in the mixed steam is condensed and dripped into the oil condensation tank through the oil condensation tank body. At the bottom of the main body, it is automatically discharged through the discharge pipe, which achieves the effect of effectively filtering the solid dust and heavy oil in the mixed steam.

Description of drawings

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is the front view structure schematic diagram of the present invention;

Fig. 3 is the side view sectional structure schematic diagram of the thermal separation bin body of the present invention;

Fig. 4 is the side view sectional structure schematic diagram of the oil condensation bin body of the present invention;

FIG. 5 is a schematic top view of the structure of the present invention.

In the figure: 1. Fastening screw; 2. Servo motor; 3. Support frame; 4. Cover body; 5. Body of thermal separation bin; 6. First gas pipe; 7. Ceramic wear-resistant arc plate; 8. Section 1. Bearing; 9. First feeding pipe; 10. Solenoid valve; 11. Sealing ring; 12. Liquid level sensing device; 13. Mixing bin; 14. Screw conveying device; 15. Friction rod; 16. Second feeding Feed pipe; 17, rotating shaft; 18, second bearing; 19, discharge pipe; 20, oil condensation tank body; 21, partition plate; 22, filter plate; 23, second gas pipe; 24, pull ring; 25 , Rubber gasket; 26, temperature gauge.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end" and "the other end" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, a specific orientation, and a specific orientation. The orientation configuration and operation are therefore not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense, for example, "connected" may be a fixed connection It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Please refer to FIG. 1 to FIG. 5, an embodiment provided by the present invention: a thermal separation device for recycling oil-based drilling waste in an offshore oil field, comprising a servo motor 2, a thermal separation bin body 5, a solenoid valve 10, and a mixing bin 13. The second feed pipe 16, the rotating shaft 17 and the oil condensing bin body 20, the top of the heat separation bin body 5 is raised and is installed in communication with one end of the first gas pipe 6. By setting the heat separation bin body 5, the heat separation bin body is 5. The top end is set as an upward raised structure, and the bottom end of the raised structure is higher than the top of the ceramic wear-resistant arc plate 7, so that the maximum liquid level of the oil-based drilling waste in the heat separation bin body 5 is lower than the bottom end of the raised structure, so that the oil-based drilling waste The liquid level cross-sectional area of the drilling waste in the thermal separation bin body 5 is maximized, thereby promoting the efficiency of steam generation from the oil-based drilling waste, and a large amount of steam generated by the oil-based drilling waste can pass along the thermal separation bin body 5. The inner wall is upward, and is discharged through the first gas delivery pipe 6, so as to achieve the effect of improving the steam generation efficiency. The other end of the first gas delivery pipe 6 is installed in communication with one side of the upper surface of the oil condensation silo body 20, the other side of the upper surface of the oil condensation silo body 20 is provided with an opening, and the oil condensation silo body below the opening on the upper surface of the oil condensation silo body 20 A partition plate 21 is fixedly installed in 20, a hole is opened in the middle of one side of the partition plate 21, a filter plate 22 is movably installed in the hole on the partition plate 21, and a rubber gasket 25 is fixedly connected to the top of the filter plate 22. A pull ring 24 is fixedly installed on the upper surface of the pad 25, the oil condensation chamber body 20 and the heat separation chamber body 5 are connected with a second gas pipe 23 on the side away from the side, and the oil condensation chamber body 20 is close to the lower side of the heat separation chamber body 5. A discharge pipe 19 is connected and installed, and the lower surface of the inner wall of the discharge pipe 19 and the lower surface of the partition plate 21 are at the same level. The main body 20 is connected and installed, and the generated mixed steam is transported to the oil condensation chamber body 20 through the first gas delivery pipe 6, and the mixed steam is filtered through the filter plate 22 movably installed in the oil condensation chamber body 20, so that the mixed steam is filtered. The mixed solid dust is adsorbed on the filter plate 22, and at the same time, the heavy oil in the mixed steam is condensed through the oil condensation chamber body 20 and drips to the bottom of the oil condensation chamber body 20, and is automatically discharged through the discharge pipe 19, achieving effective filtration. Effect of mixing solid dust and heavy oil in steam. A temperature gauge 26 is embedded in the front surface of the outer wall of the heat separation chamber body 5 . The cover body 4 is fixedly installed on one side of the thermal separation bin body 5 by tightening screws 1 , and a ceramic wear-resistant arc-shaped plate 7 is fixedly installed under the inner wall of the thermal separation bin body 5 . The cover body 4 is fixedly connected with the heat separation chamber body 5, which makes the disassembly and assembly of the heat separation chamber body 5 more convenient. To facilitate maintenance and reduce maintenance costs.

One side of the cover body 4 has a hole in the middle and is fitted with a second bearing 18 , and one side of the inner wall of the heat separation bin body 5 is fitted with a first bearing 8 . The ends are fixedly connected, the surface of the rotating shaft 17 is distributed in an annular array at equal distances and is fixedly connected to the friction rod 15. The end of the friction rod 15 away from the rotating shaft 17 contacts the inner wall of the ceramic wear-resistant arc plate 7 but is not fixedly connected. One end of the rotating shaft 17 protrudes from the second bearing 18 and is rotatably connected to one side of the servo motor 2 . The bottom end of the heat separation bin body 5 has a hole and is installed in communication with one end of the second feed pipe 16 , and a screw conveying device 14 is fixedly installed on the second feed pipe 16 . The other end of the second feeding pipe 16 is installed in communication with the bottom end of the mixing silo 13, the top of the mixing silo 13 is connected and installed with the first feeding pipe 9, and the top side of the mixing silo 13 has a hole and is embedded with a sealing ring 11. A liquid level sensing device 12 is embedded and installed in the sealing ring 11 . The liquid level sensing device 12 is electrically connected to the solenoid valve 10 , and the solenoid valve 10 is fixedly installed on the first feeding pipe 9 . By arranging the liquid level sensing device 12 and setting the bottom end of the liquid level sensing device 12 and the ceramic wear-resistant arc-shaped plate 7 to the same horizontal plane, and at the same time electrically connecting the liquid level sensing device 12 and the solenoid valve 10, the oil in the mixing bin 13 is When the base drilling waste reaches the bottom end of the liquid level sensing device 12, the solenoid valve 10 automatically closes the first feeding pipe 9, and the oil-based drilling waste flows into the heat separation bin body 5 through the second feeding pipe 16 under the action of pressure. And when it reaches the top of the ceramic wear-resistant arc plate 7, the material injection is stopped, and the effect of automatic adjustment of the feeding amount is achieved.

Working principle: when the present invention is used, the oil-based drilling waste is stored in the mixing bin 13 through the first feeding pipe 9, and the oil-based drilling waste is connected to the second feeding pipe 16 installed at the bottom end of the mixing bin 13. Under the action of the pressure and the screw conveying device 14, it enters the heat separation bin body 5. When the oil-based drilling waste entering the heat separation bin body 5 reaches the top of the ceramic wear-resistant arc plate 7, the oil in the mixing bin 13 When the liquid level of the base drilling waste reaches the bottom of the liquid level sensing device 12, the solenoid valve 10 is automatically closed, so that the first feeding pipe 9 no longer injects material into the mixing silo 13. At this time, the screw conveying device 14 automatically closes and stops. The material is injected into the heat separation bin body 5, and the high temperature generated by the friction between the friction rod 15 and the inner wall of the ceramic wear-resistant arc plate 7 is driven by the servo motor 2 to heat the oil-based drilling waste and generate steam, and the generated steam passes through the first The gas delivery pipe 6 is discharged into the oil condensing bin body 20, and the heavy oil in the steam is condensed and dripped at the bottom of the oil condensing bin body 20 through the oil condensing bin body 20, and can be automatically discharged through the discharge pipe 19, removing the heavy oil. When the steam passes through the holes on the partition plate 21 , it is filtered by the filter plate 22 , thereby effectively removing the solidified substances such as dust mixed in the steam, and the filtered steam is discharged through the second air pipe 23 .

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and range of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

Claims

A thermal separation device for recycling oil-based drilling waste in an offshore oil field, comprising a servo motor (2), a thermal separation bin body (5), a solenoid valve (10), a mixing bin (13), and a second feed pipe (16) ), the rotating shaft (17) and the oil condensation bin body (20), characterized in that a cover (4) is fixedly installed on one side of the heat separation bin body (5) by tightening screws (1). A ceramic wear-resistant arc-shaped plate (7) is fixedly installed under the inner wall of the bin body (5), a second bearing (18) is embedded and installed with a hole in the middle of one side of the cover body (4), and the heat separation bin body ( 5) A first bearing (8) is embedded and installed on one side of the inner wall, and the inner wall of the first bearing (8) and the inner wall of the second bearing (18) are respectively fixedly connected to both ends of the rotating shaft (17), and the rotating shaft (17) One end protrudes from the second bearing (18) and is rotatably connected to one side of the servo motor (2). The other end of the second feeding pipe (16) is installed in communication with the bottom end of the mixing silo (13), the top of the mixing silo (13) is connected with a first feeding pipe (9), and the mixing silo (13) 13) A hole is opened on one side of the top end and a sealing ring (11) is embedded and installed, and a liquid level sensing device (12) is embedded and installed in the sealing ring (11).
The thermal separation device for recycling oil-based drilling waste in offshore oil fields according to claim 1, characterized in that the top of the thermal separation bin body (5) is uplifted and installed in communication with one end of the first gas pipeline (6), The other end of the first gas delivery pipe (6) is installed in communication with one side of the upper surface of the oil condensation chamber body (20), the other side of the upper surface of the oil condensation chamber body (20) is provided with an opening, and the upper surface of the oil condensation chamber body (20) is provided with an opening. A partition plate (21) is fixedly installed in the oil condensation tank body (20) below the opening, a hole is opened in the middle of one side of the partition plate (21), and a filter plate is movably installed in the hole on the partition plate (21). (22), a rubber gasket (25) is fixedly connected to the top of the filter plate (22), a pull ring (24) is fixedly installed on the upper surface of the rubber gasket (25), and the oil condensation chamber body (20) and the heat separation chamber body ( 5) A second gas delivery pipe (23) is connected and installed on the upper side of the opposite side, and a discharge pipe (19) is connected and installed under the side of the oil condensation silo body (20) close to the heat separation silo body (5), and the discharge pipe ( 19) The lower surface of the inner wall and the lower surface of the partition plate (21) are at the same level, and a thermometer (26) is embedded in the front of the outer wall of the heat separation bin body (5).
A thermal separation device for recycling oil-based drilling waste in offshore oilfields according to claim 1, characterized in that: the surface of the rotating shaft (17) is distributed in a circular array at equal distances and is fixedly connected with friction rods (15), which are (15) One end away from the rotating shaft (17) is in contact with the inner wall of the ceramic wear-resistant arc-shaped plate (7) but is not fixedly connected.
A thermal separation device for recycling oil-based drilling waste in offshore oilfields according to claim 1, characterized in that: the servo motor (2) is fixedly installed on the cover (4) through the support frame (3) away from the thermal separation One side of the bin body (5).
The thermal separation device for recycling oil-based drilling waste in offshore oil fields according to claim 1, characterized in that a screw conveying device (14) is fixedly installed on the second feed pipe (16).
A thermal separation device for recycling oil-based drilling waste in offshore oil fields according to claim 1, characterized in that: the liquid level sensing device (12) is electrically connected to the solenoid valve (10), and the solenoid valve (10) is fixed Installed on the first feeding pipe (9), the bottom end of the liquid level sensing device (12) and the top end of the ceramic wear-resistant arc-shaped plate (7) are at the same level.