Acidification sand prevention workboat for offshore drilling platform and assembly method

Abstract

The invention relates to the technical field of offshore oilfield drilling platform service, and discloses an acidification sand prevention workboat for an offshore drilling platform. The workboat comprises a 700-type oil field working pump and a 1000-type oil field working pump which are installed in a left cabin and a right cabin of the workboat respectively, a left small stirring cabin and a right small stirring cabin are arranged in the middles of the cabins, an engineering fresh water cabin and a deck are arranged behind the cabins, and the working pumps are fixed in pump cabins in a welding and rivet riveting mode and driven by corresponding diesel engines. The inlets and outlets of the pumps are connected with a manifold system, the manifold system can achieve mutual communication of the left and right engineering fresh water tanks and the left and right small stirring tanks, the interiors of the manifold system are communicated with the inlets and outlets of the pumps respectively, and a plurality of valves are arranged on a manifold and can control the flowing direction of liquid. According to the method, operation equipment and a ship are integrally designed and assembled, the hoisting cost is greatly saved, and the construction scale of acidification sand prevention can be increased through an efficient pump and an integrated manifold system.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore oilfield drilling platform services, in particular to an acidizing and sand control operation vessel for an offshore drilling platform and an assembly method thereof. Background Art

[0002] At present, in the routine oil field operations of domestic offshore drilling platforms, including acidizing, sand control, well washing and other operations, there are no special operation ships to provide services. All operations are based on lifting the operation equipment onto the deck of the transport ship for sea operations. This not only increases the operation costs, but also increases the safety risks brought by the wind and waves at sea. There is a lot of noise during the operation. At the same time, the storage and lifting process of harmful liquids during the construction of the drilling platform are prone to environmental pollution and other problems.

[0003] Therefore, an environmentally friendly acidizing and sand control operation vessel for offshore drilling platforms and its assembly method are proposed. The vessel is specially designed to provide acidizing, sand control, and well washing services for offshore drilling platforms, which is of great significance to the development of offshore oil. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides an acidizing sand control operation vessel for an offshore drilling platform and an assembly method thereof, which solves the problems raised by the above-mentioned background technology.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an acidizing and sand control operation vessel for an offshore drilling platform, comprising an operation vessel, wherein the operation vessel comprises: a 700 type oilfield operation pump and a 1000 type oilfield operation pump respectively installed in its left and right cabins, two small mixing chambers on the left and right sides of the cabin, and an engineering fresh water tank and a deck behind them. The operation pumps are fixed to the pump cabin by welding and riveting, and are all driven by corresponding diesel engines. The inlet and outlet of the pumps are connected to a manifold system, thereby saving deck space and reducing noise pollution.

[0008] As a preferred technical solution of the present invention, the manifold system can realize the mutual connection between the two left and right engineering fresh water tanks and the two left and right small mixing tanks, and the internal parts are respectively connected to the inlets and outlets of the two pumps. There are multiple valves on the manifold to control the flow direction of the liquid, and the inlets and outlets on the external deck can realize the connection with the wellhead pipeline of the drilling platform. The manifold system connects the inlet and outlet ends of the pump, and is interconnected with the fresh water compartment and the mixing compartment. The switch of the compartment is controlled by a butterfly valve. The outlet is connected to the high-pressure pipeline of the deck. A safety alarm valve is installed at the outlet end of the pump, and the pipe at the outlet end is a high-pressure pipeline that can withstand an internal pressure of 105MPa.

[0009] As a preferred technical solution of the present invention, the two small mixing chambers on the left and right are composed of two layers, upper and lower, with six stirring blades. The stirring blades are driven by a motor, the motor circuit is connected to the ship's engine room, and the motor is driven by the ship's power system to ensure uniform mixing of high-viscosity mud liquids during operation.

[0010] As a preferred technical solution of the present invention, the engineering fresh water tank is transformed from a regulating water tank, and the interior is treated with acid and corrosion prevention. The engineering fresh water tank is connected to the manifold system to realize the discharge and discharge operations of fresh water in the cabin by two pumps.

[0011] As a preferred technical solution of the present invention, an operating room is provided on the deck, and the 700 type oilfield operating pump and the 1000 type oilfield operating pump are located in the operating room. An instrument control system and an instrument display panel are installed inside the operating room. A monitoring system is provided in the operating room, which is connected to the left and right control rooms on the deck through a circuit system to realize remote operation of the two pumps respectively. An instrument control system and an instrument display panel are installed inside the operating room, which can record construction data in real time and observe changes in pressure and displacement during construction. A monitoring system is also installed in the pump cabin to monitor the operation of the two pumps in the pump cabin in real time to ensure operation safety.

[0012] As a preferred technical solution of the present invention, a marine crane is installed in the middle of the port side of the deck, with a lifting height of 8m, a turning radius of 6m, and a rated load of 30 tons to meet the ship's lifting needs for equipment, pipelines and other materials required for offshore drilling platform operations.

[0013] As a preferred technical solution of the present invention, an open tank is placed on the deck, four hoisting rails required for hoisting are installed on the outer side of the upper part of the open tank, two quick connector openings are installed on the bottom, and two quick connectors are welded to connect with the pipeline to realize the pumping in and out of the liquid.

[0014] As a preferred technical solution of the present invention, the deck is equipped with 8 dormitories and 3 offices to meet the office and accommodation needs of 10 workers of the offshore drilling platform operation and construction team.

[0015] As a preferred technical solution of the present invention, the manifold system and the interiors of the left and right small mixing chambers are coated with a hydrochloric acid anti-corrosion coating, which is composed of epoxy resin, xylene, diacetone alcohol, cyclohexanone, phenolic resin, chromium oxide green, precipitated barium sulfate, graphite, polytetrafluoroethylene, polyacrylate copolymer solution, polymethyl alkylsiloxane solution, and polyamide wax.

[0016] An assembly method for an acidizing sand control operation vessel for an offshore drilling platform is as follows:

[0017] S1. First, install pumps in the left and right compartments in the middle of the ship. Hoist the 700 and 1000 type service pumps to the left and right pump rooms respectively, and then weld and fix them at the bottom.

[0018] S2. Based on S1, the left and right regulating water tanks are transformed into mixing tanks. The upper deck is cut off, and mixing paddles are installed. A motor is installed, and the circuit control system is connected to the engine room to realize the control of the mixing tank by the engine room. A steel mesh is installed on the upper part of the mixing tank to be flush with the deck.

[0019] S3. Based on S2, a manifold system is installed. Openings are opened for the engineering fresh water tank and mixing tank respectively, corresponding to the left and right pump compartments, so that a single pump can control the pumping in and out of the two fresh water tanks and two mixing tanks. A valve is installed at each outlet. The manifold system connects the two pumps and the outlet end is connected to the deck through a tee to achieve docking with the offshore drilling platform. A safety valve is installed at the outlet end to monitor the outlet pressure in real time.

[0020] S4. Based on S3, a control room is installed on the second deck, the pump control system is connected to the control room, an instrument panel is installed, and a monitoring system is installed in the pump compartment. The monitoring system circuit and display are connected to the control room to realize remote operation and real-time monitoring of the pump;

[0021] S5. Based on S4, a ship crane is installed on one side of the deck to lift some operating equipment and pipelines;

[0022] S6: Based on S5, two movable opening tanks are installed on the deck and equipped with several 2-7 / 8-inch hoses with a pressure resistance of 35MPa to achieve docking with the drilling platform.

[0023] (3) Beneficial effects

[0024] Compared with the prior art, the present invention provides an acidizing sand control operation vessel for offshore drilling platforms and an assembly method thereof, which has the following beneficial effects:

[0025] 1. The acidizing sand control workboat and assembly method for offshore drilling platforms frees up deck space by installing the work pump directly inside the hull. A control room is installed on the deck to enable remote operation and monitoring of the pump inside the hull, effectively avoiding noise pollution. Traditional workboats skid-mount the acidizing sand control equipment and hoist it onto the deck when operations are required, with the vessel serving as a transport. The present invention is specifically designed for offshore drilling platform services. The work equipment and boat are designed and assembled in an integrated manner, significantly saving hoisting costs. At the same time, the efficient pump and integrated manifold system increase the scale of acidizing sand control operations.

[0026] 2. The acidizing and sand control operation vessel and assembly method for the offshore drilling platform further saves deck space by utilizing the fresh water compartment and mixing compartment transformed from the ship's own regulating water tank. The interior of the compartment has been treated with anti-corrosion, which enables the storage of harmful liquids and the preparation of chemical liquids for oilfield construction. It can meet the oilfield operation needs of offshore drilling platforms such as acidizing, well washing, and fracturing and sand control. The deck of the operation vessel has open tanks that have been treated with anti-corrosion. During construction, it can be used to store some oilfield waste liquids generated by the drilling platform and transport them to land for professional treatment, avoiding pollution to the environment and expanding the scope of use of the acidizing and sand control operation vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a side structural diagram of the acidizing sand control operation vessel of the present invention;

[0028] Figure 2 This is a schematic diagram of the deck plan structure of the acidizing sand control operation vessel of the present invention;

[0029] Figure 3 This is a schematic diagram of the bottom structure of the acidizing sand control operation ship of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the manifold system of the acidizing sand control operation vessel of the present invention;

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of the open tank on the deck of the acidizing sand control operation ship from one perspective. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] Reference Figure 1-5 , provides an acidizing and sand control operation vessel for offshore drilling platforms, the operation vessel includes: a 700 type oilfield operation pump and a 1000 type oilfield operation pump installed in its left and right cabins respectively, two small mixing chambers on the left and right sides are arranged in the middle of the cabin, and there are engineering fresh water tanks and decks behind them. The operation pumps are fixed to the pump cabin by welding and riveting, and are all driven by corresponding diesel engines. The inlet and outlet of the pumps are connected to the manifold system.

[0034] In this embodiment, two oilfield operation pumps are installed in the left and right pump rooms, one 700 type and the other 1000 type. Two regulating water tanks are converted into fresh water tanks, and the other two regulating water tanks are converted into mixing tanks. The fresh water tanks and mixing tanks are connected to the inlet and outlet ends of the left and right pumps through manifolds. The outlet end is a high-pressure pipeline connected to the deck. During operation, the high-pressure hose line is connected to the drilling platform to achieve the required operations of the oilfield.

[0035] The 700 oilfield operation pump is a 700 horsepower plunger mud pump with a plunger size of 4 inches. It can achieve a construction displacement of 1.7m at 14.6MPa. 3 / min, under 54.9MPa, the construction displacement can be 0.185m 3 / min, the 1000 oilfield operation pump is a 1000 horsepower plunger mud pump with a plunger size of 4 inches. It can achieve a construction displacement of 2.78m at 14.6MPa. 3 / min, and the construction displacement can reach 0.309m at 54.9MPa 3 / min.

[0036] The manifold system can realize the mutual connection between the two engineering fresh water tanks on the left and right and the two small mixing tanks on the left and right. The inlets and outlets of the two pumps are connected internally. There are multiple valves on the manifold to control the flow direction of the liquid. The inlets and outlets on the external deck can be connected with the wellhead pipeline of the drilling platform.

[0037] In this embodiment, it is specifically a manifold system, which connects the fresh water tank and the mixing tank, and leads to the inlet and outlet ends of the left and right pumps respectively. The outlet end is a high-pressure pipeline, each of which is equipped with a safety alarm valve and connected to the high-pressure elbow on the deck surface, which can be connected to the drilling platform through a hose line.

[0038] The two small mixing chambers on the left and right are composed of two layers, upper and lower layers, and six mixing blades. The mixing blades are driven by a motor. The motor circuit is connected to the ship's engine room, and the motor is driven by the ship's power system.

[0039] In this embodiment, it is specifically a mixing tank, which is transformed from a water regulating tank. The upper deck is cut open and replaced with a mesh cover that can be opened on the deck to facilitate the addition of liquid ingredients during construction and the observation of the liquid level during construction. A mixing suspended blade is installed in the middle of each mixing tank to stir the liquid during construction. Its control system is independently controlled by the ship's own power system.

[0040] The engineering fresh water tank is transformed from a regulating water tank, and its interior is treated with acid and corrosion prevention. The engineering fresh water tank is connected to the manifold system and is used to realize the discharge and discharge of fresh water in the tank by two pumps.

[0041] An open tank is placed on the deck, with four lifting rails required for lifting installed on the outer side of the upper part of the open tank, and two quick connector openings installed on the bottom.

[0042] In this embodiment, the open tank on the deck is an independently welded 18m 3 The cubic tank is made of steel structure, with anti-corrosion treatment inside. The bottom is open and equipped with quick connectors for easy connection of hose lines. A hanging rail is welded on the upper outer edge for easy lifting and movement.

[0043] There is an operation room on the deck. The 700 type oilfield operation pump and the 1000 type oilfield operation pump are located in the operation room. The instrument control system and instrument display panel are installed inside the operation room, and a monitoring system is installed in the operation room.

[0044] In this embodiment, it is specifically an operating room installed on the deck, which can realize remote control of the left and right pumps respectively. At the same time, a monitoring system is installed to observe the operating conditions in the pump room.

[0045] A marine crane is installed in the middle of the port side of the deck, with a lifting height of 8m, a turning radius of 6m and a rated load of 30 tons.

[0046] In this embodiment, a crane is installed on the right side of the deck, with a slewing radius of 6m, a lifting height of 6m, and a rated load of 30 tons, which can basically meet the lifting requirements required for acidizing sand control operations.

[0047] The deck is equipped with 8 dormitories and 3 offices to meet the office and accommodation needs of 10 staff members of the offshore drilling platform operation and construction team.

[0048] The manifold system and the interior of the two small mixing chambers on the left and right are coated with a hydrochloric acid anti-corrosion coating, which is composed of epoxy resin, xylene, diacetone alcohol, cyclohexanone, phenolic resin, chromium oxide green, precipitated barium sulfate, graphite, polytetrafluoroethylene, polyacrylate copolymer solution, polymethyl alkylsiloxane solution, and polyamide wax.

[0049] A method for assembling an acidizing sand control operation vessel for an offshore drilling platform specifically comprises the following steps:

[0050] S1. First, install pumps in the two left and right compartments in the middle of the ship. Cut the deck open, hoist the 700 type and 1000 type oilfield operation pumps into the two left and right pump rooms respectively, and then weld and fix them at the bottom.

[0051] S2. Based on S1, the left and right regulating water tanks are transformed into mixing tanks. The upper deck is cut off, and mixing paddles are installed. A motor is installed, and the circuit control system is connected to the ship's engine room to realize the engine room's control over the mixing tank. A steel mesh is installed on the top of the mixing tank to be flush with the deck.

[0052] S3. On the basis of S2, a manifold system is installed, and the engineering fresh water tank and mixing tank are opened separately, corresponding to the left and right pump chambers, so that a single pump can control the pumping in and out of the two fresh water tanks and two mixing tanks. A valve is installed at each outlet, and the manifold system connects the two pumps, and the outlet end is connected to the deck through a tee to achieve docking with the offshore drilling platform. A safety valve is installed at the outlet end to monitor the outlet pressure in real time. Once the pressure exceeds the construction pressure limit, the control system automatically stops the pump.

[0053] S4. Based on S3, a control room is installed on the second deck, the pump control system is connected to the control room, and a monitoring system is installed in the pump compartment. The monitoring system circuit and display screen are connected to the control room to realize remote operation and real-time monitoring of the pump.

[0054] S5. Based on S4, a ship crane is installed on one side of the deck to lift some operating equipment and pipelines.

[0055] S6, based on S5, two 18m 3 The removable open tank is equipped with several 2-7 / 8-inch hose lines with a pressure resistance of 35MPa to achieve docking with the drilling platform during operation.

[0056] Working principle: When the drilling platform needs acidizing operation, a 700 oilfield operation pump is sufficient to meet the construction requirements. The high-pressure pipeline on the deck can be connected to the oil and gas wellhead of the drilling platform through a high-pressure hose line. The acid can be stored in the mixing chamber or stored independently in an acid tank on the deck. The acid is connected through the manifold system to achieve suction at the pump inlet. The pump is operated through the control room to realize the acidizing operation of the oil and gas well.

[0057] When the drilling platform needs to clean the well, the outlet of the high-pressure pipeline is connected to the drilling platform through a hose line. At the same time, the drilling platform is connected to the open tank on the deck with another high-pressure hose line to realize the circulation of the well cleaning fluid and complete the well cleaning operation. The waste liquid, mud and sand in the well and crude oil generated by the well cleaning can be stored in the open tank and transported to the land for special treatment;

[0058] When the drilling platform needs fracturing and sand control operations, the 1000 oilfield operation pump and the 700 oilfield operation pump can be operated at the same time, and the pressure of 2-3m can be achieved under the normal 30MPa conditions. 3 / min construction displacement to meet the needs of fracturing and sand control. The deck surface can be used to place skid-mounted sand tanks and fracturing fluid tanks required for sand control. The mixing chamber can realize the sand mixing function and provide sand mixing fluid for the pump. Through the high-pressure outlet of the pump, the high-pressure hose line is connected to the oil and gas wellhead of the drilling platform to realize the injection of sand mixing fluid into the well, realizing high-sand ratio fracturing and filling sand control operations in the formation.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An acidizing sand control operation vessel for an offshore drilling platform, comprising an operation vessel, characterized in that: The work boat comprises: a 700 type oilfield work pump and a 1000 type oilfield work pump respectively installed in its left and right cabins, two left and right small mixing chambers are arranged in the middle of the cabin, and there are engineering fresh water tanks and decks behind them. The work pumps are fixed to the pump cabin by welding and riveting, and are all driven by corresponding diesel engines. The inlet and outlet of the pumps are connected to the manifold system.

2. The acidizing sand control operation vessel for offshore drilling platforms according to claim 1, characterized in that: The manifold system can realize the mutual connection between the two left and right engineering fresh water tanks and the two left and right small mixing tanks. The inlets and outlets of the two pumps are connected internally. There are multiple valves on the manifold to control the flow direction of the liquid. The inlets and outlets on the external deck can realize the connection with the wellhead pipeline of the drilling platform.

3. The acidizing sand control operation vessel for offshore drilling platforms according to claim 1, characterized in that: The two left and right small mixing chambers are composed of two layers, upper and lower layers, and six mixing suspended blades. The mixing suspended blades are driven by a motor. The motor circuit is connected to the engine room of the ship, and the motor is driven by the power system of the ship.

4. The acidizing sand control operation vessel for offshore drilling platforms according to claim 1, characterized in that: The engineering fresh water tank is transformed from a regulating water tank, and the interior is treated with acid and corrosion resistance. The engineering fresh water tank is connected to the manifold system and is used to realize the discharge and discharge operations of fresh water in the cabin by two pumps.

5. The acidizing sand control operation vessel for offshore drilling platforms according to claim 1, characterized in that: An operation room is arranged on the deck, the 700 type oilfield operation pump and the 1000 type oilfield operation pump are located in the operation room, an instrument control system and an instrument display panel are installed inside the operation room, and a monitoring system is arranged in the operation room.

6. The acidizing sand control operation vessel for offshore drilling platforms according to claim 5, characterized in that: A marine crane is installed in the middle of the port side of the deck, with a lifting height of 8m, a turning radius of 6m and a rated load of 30 tons.

7. The acidizing sand control operation vessel for offshore drilling platforms according to claim 5, characterized in that: An open tank is placed on the deck, four hoisting rails required for hoisting are installed on the outer side of the upper part of the open tank, and two quick-connector openings are installed on the bottom.

8. The acidizing sand control operation vessel for offshore drilling platforms according to claim 5, characterized in that: The deck is equipped with 8 dormitories and 3 offices.

9. The acidizing sand control operation vessel for offshore drilling platforms according to claim 2, characterized in that: The manifold system and the interiors of the left and right small mixing chambers are coated with a hydrochloric acid anti-corrosion coating, which is composed of epoxy resin, xylene, diacetone alcohol, cyclohexanone, phenolic resin, chromium oxide green, precipitated barium sulfate, graphite, polytetrafluoroethylene, polyacrylate copolymer solution, polymethyl alkyl siloxane solution, and polyamide wax.

10. A method for assembling an acidizing sand control operation ship for an offshore drilling platform, characterized in that: The assembly method is as follows: S1. First, install pumps in the left and right cabins in the middle of the ship. Lift the 700-type and 1000-type operating pumps to the left and right pump cabins respectively, and then fix them by welding at the bottom. S2. Based on S1, the left and right regulating water tanks are transformed into mixing tanks, the upper deck is cut off, mixing suspended blades are installed, motors are installed, and the circuit control system is connected to the ship's engine room to realize the control of the mixing tank by the engine room. A steel mesh is installed on the top of the mixing tank to be flush with the deck; S3. On the basis of S2, a manifold system is installed, and the engineering fresh water tank and mixing tank are opened separately, corresponding to the left and right pump chambers, so that a single pump can control the pumping in and out of the two fresh water tanks and two mixing tanks. A valve is installed at each outlet, and the manifold system connects the two pumps, and the outlet end is connected to the deck through a tee to achieve docking with the offshore drilling platform. A safety valve is installed at the outlet end to monitor the outlet pressure in real time; S4. Based on S3, a control room is installed on the second deck, the pump control system is connected to the control room, an instrument panel is installed, and a monitoring system is installed in the pump room. The monitoring system circuit and display screen are connected to the control room to realize remote operation and real-time monitoring of the pump; S5. Based on S4, a ship crane is installed on one side of the deck to lift some operating equipment and pipelines; S6. Based on S5, two movable open tanks are installed on the deck, and several 2*7 / 8-inch hose lines with a pressure resistance of 35MPa are configured to achieve docking with the drilling platform.

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