Rapid dredging device and method for oil field

Abstract

The invention discloses a rapid dredging device and method for an oil field, and belongs to the technical field of oil field produced water. A container is included; a pollution discharge pipeline winch is arranged in the container; a cable winch is arranged above the pollution discharge pipeline winch; a hydraulic station is arranged on one side of the sewage discharge pipeline winch; an operation table is arranged on the other side of the sewage discharge pipeline winch; a distribution box is arranged above the operation table; an underwater operation end is also placed in the container; the underwater operation end comprises spiral push wheels which are symmetrically arranged at the bottom; the rear end of the spiral push wheel is connected with a driving motor; a conveying pump is arranged at the front end of the spiral push wheel; a mud pushing plate is further arranged between the conveying pump and the spiral pushing wheel; a rotating auger and an auger rotating motor are further arranged at one end of the conveying pump; the rotary auger is perpendicular to the spiral push wheel; the delivery pump outlet is connected with a blow-off pipe inlet; a closed bin is arranged between the blow-off pipe and the spiral push wheel; and a hydraulic control valve is arranged in the closed bin. Deposited oil sludge at the bottom of the sludge tank can be removed.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield produced water and relates to an oilfield rapid silt removal device and method. Background Art

[0002] In order to maintain reservoir energy and oil production rate during oilfield development, water injection development is still the main technical measure for the current development of Changqing Oilfield. The quality of water injection plays an important role in oilfield development. The structural characteristics of low permeability reservoirs result in high requirements for water injection quality. The produced water treatment system must continuously improve the quality of the treated effluent. In addition to being related to the key treatment process of produced water treatment, the quality of the effluent from produced water treatment is also related to the auxiliary process of produced water treatment. The auxiliary process of produced water treatment includes treatment units such as dosing, sludge discharge, sludge treatment, and sludge reduction. In order to improve the water quality of produced water treatment without changing the main treatment process, it is necessary to effectively treat the oily sludge generated by the water treatment system, and clean up the removed oily sludge from the produced water treatment system in a timely and efficient manner. Otherwise, it will form a vicious cycle within the system, seriously affecting the water quality and operation effect.

[0003] At present, the fluidity and homogeneity of fresh sludge in the oily sludge pool are relatively good, and it can be lifted well by conventional sludge lifting pumps. However, in actual operation, the oily sludge is often not cleaned in time, resulting in the oily sludge in the sludge pool to easily aggregate or settle due to gravity after a period of time to form sedimentary sludge with poor fluidity. When the sludge lifting pump is used for lifting again, it is affected by the fluidity, and the sludge lifting pump will have a conical local suction centered on the lifting pump, the displacement becomes smaller, and the efficiency becomes lower, making it difficult to clean and lift the sludge pool. Manual cleaning has problems such as high labor intensity and safety hazards. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems in the prior art of large manual dredging intensity, difficulty in dredging and potential safety hazards in underground oily sludge pools, and to provide an oilfield rapid dredging device and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention provides an oilfield rapid dredging device, comprising a container; a sewage pipeline winch is arranged in the container; a cable winch is arranged above the sewage pipeline winch; a hydraulic station is arranged on one side of the sewage pipeline winch; an operating table is arranged on the other side of the sewage pipeline winch; a distribution box is arranged above the operating table; an underwater working end is also placed in the container; the underwater working end includes a spiral push wheel symmetrically arranged at the bottom; the rear end of the spiral push wheel is connected to a driving motor; a conveying pump is arranged at the front end of the spiral push wheel; a mud pushing plate is also arranged between the conveying pump and the spiral push wheel; a rotating auger and an auger rotating motor are also arranged at one end of the conveying pump; the rotating auger is perpendicular to the spiral push wheel; the conveying pump outlet is connected to the sewage pipe inlet; the sewage pipe is located above the spiral push wheel; a closed chamber is arranged between the sewage pipe and the spiral push wheel; a hydraulic control valve is arranged in the closed chamber.

[0007] Furthermore, a high-pressure water nozzle is arranged above the auger rotating motor; the delivery pump is a crude oil pump, a vacuum pump or a slurry pump.

[0008] Furthermore, an anti-collision wheel is provided at the rear end of the spiral push wheel, and the anti-collision wheel is located outside the driving motor; a baffle is also provided above the spiral push wheel, and the baffle is provided below the closed chamber.

[0009] Furthermore, a camera is provided above the auger rotating motor for remote video monitoring.

[0010] Furthermore, the side walls of the container at two opposite positions are hydraulic movable panels.

[0011] Furthermore, a high-pressure water pump is provided on one side of the sewage pipeline winch, and the high-pressure water pump is connected to a high-pressure water gun.

[0012] Furthermore, an air pump is arranged above the high-pressure water pump, and the air pump is connected to a high-pressure air gun.

[0013] Furthermore, a crane is provided above the sewage pipeline winch.

[0014] Furthermore, the side wall of the container is also provided with an annular shower; the bottom wall of the container is also connected with a ramp and an oil collecting tank for conveniently moving the underwater working end and collecting oily sludge.

[0015] In a second aspect, the present invention provides a method for rapid desilting of an oil field using the above-mentioned device, comprising the following steps:

[0016] Transport the container to the vicinity of the sludge pool, connect the underwater operation end and the cable and sewage pipeline; provide a crane to lift the underwater operation end into the sludge pool;

[0017] The operator controls the underwater working end to move forward, backward, left and right within the working range. The rotating auger disperses, mixes, cuts and crushes the deposited silt, and collects it with the mud pusher. The conveying pump sucks the material into the sewage pipe.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention discloses a rapid desilting device and method for oil fields, which uses a rotating auger at the underwater operation end to impact, disperse, mix, cut and crush the deposited oil sludge, silt and sand, so as to achieve the effect of rapid fluidization treatment; the treated sludge is collected by a mud pusher, and a delivery pump is used to suck out the material into the sewage pipe, and then transported to the back-end processing equipment, with closed-loop transportation, safety and environmental protection. The present invention optimizes and integrates various required equipment together, and is equipped with intelligent control. The entire device is skid-mounted and movable; the oil sludge deposited at the bottom of the sludge pool can be removed, and the amount of sludge will not be increased during the desilting process; the front-end device after desilting can be automatically flushed and recovered, with low labor intensity and high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the present invention;

[0023] Figure 3 It is a schematic diagram of the overall structure of the underwater operation end of the present invention;

[0024] Figure 4 Schematic diagram of the bottom structure of the underwater operation end of the present invention

[0025] Among them: 1-container; 2-hydraulic movable plate; 3-hydraulic station; 4-high-pressure water gun; 5-high-pressure air gun; 6-cable winch; 7-crane; 8-sewage pipeline winch; 9-air pump; 10-high-pressure water pump; 11-ramp and oil collection tank; 12-operating table; 13-distribution box; 14-anti-collision wheel; 15-baffle; 16-enclosed warehouse; 17-sewage pipe; 18-camera; 19-high-pressure water nozzle; 20-auger rotating motor; 21-rotating auger; 22-mud pusher; 23-screw push wheel; 24-delivery pump; 25-drive motor; 26-ring shower. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0033] See also Figure 1 and Figure 3 The present invention discloses an oilfield rapid desilting device, comprising a container 1; a sewage pipeline winch 8 is arranged in the container 1; a cable winch 6 is arranged above the sewage pipeline winch 8; a hydraulic station 3 is arranged on one side of the sewage pipeline winch 8; an operating table 12 is arranged on the other side of the sewage pipeline winch 8; a distribution box 13 is arranged above the operating table 12; an underwater operation end is also placed in the container 1; the underwater operation end includes a spiral push wheel 23 symmetrically arranged at the bottom; the rear end of the spiral push wheel 23 is connected to A driving motor 25 is provided at the front end of the spiral push wheel 23; a mud pusher plate 22 is also provided between the conveying pump 24 and the spiral push wheel 23; a rotating auger 21 and an auger rotating motor 20 are also provided at one end of the conveying pump 24; the rotating auger 21 is perpendicular to the spiral push wheel 23; the outlet of the conveying pump 24 is connected to the inlet of the sewage pipe 17; the sewage pipe 17 is located above the spiral push wheel 23; a closed chamber 16 is provided between the sewage pipe 17 and the spiral push wheel 23; a hydraulic control valve is provided in the closed chamber 16. The deposited sludge, silt and sand are impacted, stirred, cut and crushed by the rotating auger 21 at the underwater operation end to achieve the effect of rapid fluidization treatment; the treated sludge is collected by the mud pusher plate 22, and the conveying pump 24 is used to suck the material into the sewage pipe 17, and transport it to the back-end processing equipment, closed-loop transportation, safety and environmental protection.

[0034] In a possible embodiment of the present invention, see Figure 4 A high-pressure water nozzle 19 is also provided above the auger rotating motor 20; the delivery pump 24 is a crude oil pump, a vacuum pump or a slurry pump.

[0035] In a feasible embodiment of the present invention, an anti-collision wheel 14 is also provided at the rear end of the spiral push wheel 23, and the anti-collision wheel 14 is located outside the driving motor 25; a baffle 15 is also provided above the spiral push wheel 23, and the baffle 15 is arranged below the closed chamber 16.

[0036] In a feasible embodiment of the present invention, a camera 18 is further provided above the auger rotating motor 20 for remote video monitoring. The side walls of the container 1 at two opposite positions are hydraulic movable panels 2 .

[0037] In a possible embodiment of the present invention, see Figure 2 A high-pressure water pump 10 is also provided on one side of the sewage pipe winch 8, and the high-pressure water pump 10 is connected to a high-pressure water gun 4 for convenient flushing.

[0038] In a feasible implementation manner of the present invention, an air pump 9 is further arranged above the high-pressure water pump 10 , and the air pump 9 is connected to a high-pressure air gun 5 .

[0039] In a feasible embodiment of the present invention, a crane 7 is further provided above the sewage pipeline winch 8 for moving the underwater operation end.

[0040] In a feasible embodiment of the present invention, the side wall of the container 1 is further provided with an annular shower 26; the bottom wall of the container 1 is also connected with a ramp and an oil collecting tank 11 for conveniently moving the underwater working end and collecting oily sludge.

[0041] The embodiment of the present invention discloses a method for rapid desilting of an oil field using the above device, which is characterized by comprising the following steps:

[0042] S1, transport the container 1 to the vicinity of the sludge pool, connect the underwater operation end and the cable and sewage pipeline; provide a crane 7 to lift the underwater operation end into the sludge pool;

[0043] S2, the operator controls the underwater working end to move forward, backward, left and right within the working range, and the rotating auger 21 disperses, mixes, cuts, and crushes the deposited sludge, and collects it through the mud pusher 22, and the delivery pump 24 sucks the material into the sewage pipe 17.

[0044] The working principle of the present invention is as follows:

[0045] The device of the present invention adopts an integrated mobile container structure, and the device is mainly composed of three parts: a mobile underwater operation end, a ground power and control workstation, and connecting pipelines and control cables. The mobile underwater operation end can realize the mobile functions such as forward, backward, left, right, and in-situ rotation underwater, and the ground control station mainly realizes the functions of power drive supply, status video detection, and operation control of the underwater operation end. The connecting pipeline and control cable are used to connect the underwater operation end and the ground workstation. The device can solve the problem of deposition and hardening in the oily sludge pool, poor fluidity, and poor effect of using a sludge lifting pump alone. The deposited oily sludge that is hardened and hardened is impacted and dispersed by the stirring device (high-pressure water nozzle 19 / rotating auger 21) at the front end of the underwater operation end. The deposited oily sludge, silt, and sediment are subjected to impact stirring, mixing, cutting, and crushing. After treatment, the oily sludge is collected through the material collection port set at the bottom of the underwater mobile device, and the crude oil pump, vacuum pump or slurry pump is used to suck out the material, and the dredging material is transported to the sludge reduction device or other facilities at the rear end through the pipeline for treatment. The advantages of this device are that it can remove the oily sludge deposited at the bottom of the sludge pool, does not increase the amount of sludge during the dredging process, and can be automatically flushed and recovered after treatment. It has low labor intensity and a high degree of automation.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rapid desilting device for oil fields, characterized in that: The invention comprises a container (1); a sewage pipeline winch (8) is arranged in the container (1); a cable winch (6) is arranged above the sewage pipeline winch (8); a hydraulic station (3) is arranged on one side of the sewage pipeline winch (8); an operating table (12) is arranged on the other side of the sewage pipeline winch (8); a distribution box (13) is arranged above the operating table (12); an underwater operation end is also placed in the container (1); the underwater operation end comprises a spiral push wheel (23) symmetrically arranged at the bottom; a driving motor (25) is connected to the rear end of the spiral push wheel (23); the spiral push wheel ( A delivery pump (24) is arranged at the front end of the delivery pump (23); a mud pusher (22) is also arranged between the delivery pump (24) and the spiral push wheel (23); a rotating auger (21) and an auger rotating motor (20) are also arranged at one end of the delivery pump (24); the rotating auger (21) is perpendicular to the spiral push wheel (23); the delivery pump (24) outlet is connected to the inlet of a sewage pipe (17); the sewage pipe (17) is located above the spiral push wheel (23); a sealed chamber (16) is arranged between the sewage pipe (17) and the spiral push wheel (23); and a hydraulic control valve is arranged in the sealed chamber (16).

2. The oilfield rapid dredging device according to claim 1, characterized in that: A high-pressure water nozzle (19) is also provided above the auger rotary motor (20); the delivery pump (24) is a crude oil pump, a vacuum pump or a slurry pump.

3. The oilfield rapid silt removal device according to claim 2, characterized in that: The rear end of the spiral push wheel (23) is also provided with an anti-collision wheel (14), and the anti-collision wheel (14) is located outside the driving motor (25); a baffle (15) is also provided above the spiral push wheel (23), and the baffle (15) is arranged below the closed bin (16).

4. The oilfield rapid silt removal device according to claim 3, characterized in that: A camera (18) is also provided above the auger rotary motor (20) for remote video monitoring.

5. The oilfield rapid silt removal device according to claim 1, characterized in that: The side walls of the container (1) at two opposite positions are hydraulic movable panels (2).

6. The oilfield rapid silt removal device according to claim 5, characterized in that: A high-pressure water pump (10) is also provided on one side of the sewage pipeline winch (8), and the high-pressure water pump (10) is connected to a high-pressure water gun (4).

7. The oilfield rapid silt removal device according to claim 6, characterized in that: An air pump (9) is also arranged above the high-pressure water pump (10), and the air pump (9) is connected to a high-pressure air gun (5).

8. The oilfield rapid dredging device according to claim 7, characterized in that: A crane (7) is also provided above the sewage pipeline winch (8).

9. The oilfield rapid silt removal device according to claim 8, characterized in that: The side wall of the container (1) is also provided with an annular shower (26); the bottom wall of the container (1) is also connected with a ramp and an oil collecting tank (11) for conveniently moving the underwater operation end and collecting oily sludge.

10. A method for rapid desilting of oil fields using the device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The container (1) is transported to the vicinity of the sludge pool, and the underwater operation end is connected with the cable and the sewage discharge pipeline; a crane (7) is provided to lift the underwater operation end into the sludge pool; The operator controls the underwater operation end to move forward, backward, left and right within the operation range, and the rotating auger (21) disperses, mixes, cuts and crushes the deposited sludge, and collects it through the mud pusher (22), and the delivery pump (24) sucks the material into the sewage pipe (17).

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