CN218265868U

CN218265868U - Shallow water drilling system without underwater robot or diver assisting in cleaning waste

Info

Publication number: CN218265868U
Application number: CN202121649155.XU
Authority: CN
Inventors: 斯迈·格莱迪奇
Original assignee: Paige Underwater Technology Guangzhou Co ltd
Current assignee: Paige Underwater Technology Guangzhou Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2023-01-10
Anticipated expiration: 2031-07-20

Abstract

The utility model provides a shallow water drilling system which does not need an underwater robot or a diver to assist in cleaning waste, and comprises a drilling platform and a drilling assembly; the drilling assembly comprises an underwater waste cleaning unit, wherein an upper suction port and a lower suction port are arranged on the underwater waste cleaning unit; the drilling system also comprises a shallow water drilling solid waste cleaning system, wherein the upper suction port and the lower suction port are communicated with the shallow water drilling solid waste cleaning system, and a control switch is arranged on a pipeline from the upper suction port and the lower suction port to the shallow water drilling solid waste cleaning system; the shallow water drilling system without the assistance of an underwater robot or a diver for cleaning wastes can automatically clean the fixed and redundant drilling fluid generated by drilling, and is efficient, flexible and convenient.

Description

Shallow water drilling system without underwater robot or diver assisting in cleaning waste

Technical Field

The utility model relates to an oil recovery technical field, in particular to need not underwater robot or diver and helps clearing up shallow water drilling system of wastes material.

Background

In drilling on the seabed, the bottom hole assembly is rotated into the seabed while a large amount of formation solids are displaced out of the wellbore and deposited on the seabed around the wellbore. When conducting a conduit and surface casing installation, a large amount of excess cement builds up on the wellbore solids. These solids build-up around the wellbore template and wellhead often affect the installation of other equipment such as production templates, control modules, piping, etc. Installing a drilling template or a well head area below the seabed level, requiring cleanup of wellbore solids; therefore, significant capital is spent to clean the accumulated solids on the seabed after drilling is completed. In environmentally sensitive areas, such as the coral seabed area, these accumulated wellbore solids can cause significant damage to the surrounding coral and other marine organisms.

Therefore, there is a need for a device that can automatically clean up the drilling fluid from the drilling process, both the drilling fluid and the drilling fluid.

SUMMERY OF THE UTILITY MODEL

Based on this, there is a need for a shallow water drilling system that does not require underwater robots or divers to assist in cleaning up waste.

In order to solve the technical problem, the utility model provides a shallow water drilling system which does not need an underwater robot or a diver to assist in cleaning waste, comprising a drilling platform and a drilling assembly; the drilling assembly comprises an underwater waste cleaning unit, wherein an upper suction port and a lower suction port are arranged on the underwater waste cleaning unit; the drilling system also comprises a shallow water drilling solid waste cleaning system, wherein the upper suction port and the lower suction port are communicated with the shallow water drilling solid waste cleaning system, and a control switch is arranged on a pipeline from the upper suction port and the lower suction port to the shallow water drilling solid waste cleaning system; this shallow water drilling system still includes instrument, control module and the solid cleaning unit under water of transferring, the instrument of transferring includes instrument lock and umbilical, control module with umbilical is connected, be provided with the locking groove on the solid cleaning unit under water, umbilical with the instrument of transferring is connected, makes the instrument lock of transferring can insert automatically in the locking groove.

Preferably, the shallow water drilling solid waste cleaning system comprises a suction hose, an underwater injection unit, a discharge hose, a power device and a control module; the underwater jet unit is provided with a suction inlet, a discharge outlet and a power interface, the suction hose is communicated with the suction inlet, the discharge hose is communicated with the discharge outlet, one end of the power hose is communicated with the power interface, and the other end of the power hose is communicated with the power device; the power device is electrically connected with the control module.

Preferably, the underwater spray unit comprises a safety valve, a back flush valve and a spray pump, wherein an inlet of the safety valve is communicated with the suction hose, an outlet of the safety valve is communicated with an inlet of the back flush valve, an outlet of the back flush valve is communicated with an inlet of the spray pump, and an outlet of the spray pump is communicated with the discharge hose; the power hose is communicated between the safety valve and the back flush valve.

Preferably, the well cleaning system further comprises a counterweight unit, wherein the counterweight unit is fixedly connected with the discharge hose and is positioned at one end of the discharge hose far away from the underwater jet unit.

Preferably, the shallow water drilling solid waste cleaning system further comprises a winch and a winch rope, wherein one end of the winch rope is fixedly connected with the counterweight unit, and the other end of the winch rope is connected with the winch.

Preferably, still include umbilical and control module group, the control module group set up in on the drilling platform, the one end of umbilical with the control module group is connected, the other end with power device is connected, and this shallow water drilling solid waste cleaning system still includes the winch, umbilical or/and power hose coil around on the winch.

Preferably, power device is sea water pump, sea water pump with control module group electric connection, sea water pump is close to the control module group sets up, sea water pump with still be connected with the cross-over connection hose between the winch.

Preferably, the underwater waste cleaning unit comprises a fixed seat and a conduit, the fixed seat is fixedly connected with the conduit, a waste cavity is formed in the middle of the fixed seat, the waste cavity is communicated with the conduit, the upper suction port is arranged on the conduit and communicated with the conduit, and the lower suction port is arranged on the fixed seat and communicated with the waste cavity.

Preferably, the control switch is a remote control suction road changer, and the shallow water drilling solid waste cleaning system further comprises a control module, wherein the control module is connected with the remote control suction road changer.

The utility model discloses a need not underwater robot or diver and help the shallow water drilling system who clears up the wastes material can clear up automatically and fall the fixed and unnecessary drilling fluid that the drilling produced, high-efficient, nimble and convenient.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic diagram of a shallow water drilling system without the assistance of an underwater robot or diver to clean waste in accordance with a preferred embodiment of the present invention;

2-6 are schematic diagrams of the installation process of the shallow water drilling system without the assistance of an underwater robot or diver to clean waste in accordance with the embodiments of the present invention;

FIG. 7 is a schematic illustration of the lowering tool and bottom hole assembly after it has been disengaged from the subsea solids removal unit.

In the figure: 1. sea surface; 2. a seabed; 3. seawater; 4. a drilling platform; 5. a drilling center; 6. a drill stem; 7. a wellbore; 8. a counterweight unit; 9. an underwater waste cleaning unit; 10. lowering the tool; 11. placing a tool lock; 12. drilling tool assembly; 13. an underwater spray unit; 14. a suction hose; 15. fluids with wellbore solids; 16. a discharge hose; 17. a power hose; 18. a winch rope; 19. a power plant; 20. a winch; 21. an engineering ship; 22. excavating an area; 23. drilling fluid; 24. a jumper hose; 25. drilling fluid and seawater contact interface; 26. solid-liquid waste; 27. a wire rope; 28. an upper suction port; 29. a lower suction port; 30. a flapper valve; 31. drilling fluid pumped by a drilling platform; 32. a camera; 33. a backwash valve; 34. a lower slide rigging; 35. a drill cuttings discharge zone; 36. drilling fluid reflowing from the outside of the drill pipe; 37. remotely controlling the suction circuit-changing device; 38. a cable pulling winch for the suction hose; 39. a rotation prevention plate; 40. a float.

Detailed Description

To facilitate an understanding of the present invention, reference will now be made to the more complete description of the invention, as illustrated in the accompanying drawings.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-7, the present invention provides a shallow water drilling system that does not require an underwater robot or diver to assist in cleaning up waste, comprising a drilling platform 4 and a drilling assembly; the drilling assembly comprises an underwater waste cleaning unit 9, wherein the underwater waste cleaning unit 9 is provided with an upper suction port 28 and a lower suction port 29 which can be used for extracting solids in an open hole drilling process and can also be used for extracting solids or backflow cement in casing installation, and when the underwater waste cleaning unit is used, the suction ports are selected according to conditions. The drilling system also comprises a shallow water drilling solid waste cleaning system, the upper suction port 28 and the lower suction port 29 are communicated with the shallow water drilling solid waste cleaning system, and a control switch is arranged on a pipeline from the upper suction port 28 and the lower suction port 29 to the shallow water drilling solid waste cleaning system. The return drilling fluid 23 from the upper suction port 28 and solids from the lower suction port are pumped by the shallow water drilling solids waste disposal system and discharged to a location remote from the drilling area, i.e., the cuttings discharge area 35, reducing the impact of contaminants on the visibility of the drilling area. In the process of discharging the solid-liquid waste 26, the position of discharging the solid-liquid waste 26 can be flexibly changed, and the use is flexible and convenient. The region outside the drilling zone is a drill cuttings discharge zone 35 that is at a distance from the drilling zone so that the discharged solid-liquid waste 26 does not affect the drilling operation or has little effect. Specifically, fixedly connected with camera 32 on the rubbish clearance unit 9 under water for shoot operating condition under water, camera 32 is through making a video recording cable and control module electric connection.

In a preferred embodiment, the shallow water drilling system further comprises a lowering tool 10, a control module and an underwater solids cleaning unit 9, the lowering tool 10 comprising a lowering tool lock 11 and an umbilical, the umbilical being reeled in and out by a winch together with a power hose 17, the underwater solids cleaning unit 9 being provided with a locking groove, the umbilical being connected to the lowering tool 10 so that the lowering tool lock 11 can be automatically inserted into the locking groove. Specifically, the locking groove is a J-shaped groove that mates with the drop tool lock 11. In use, the lowering tool 10 is connected to the bottom hole assembly for installation to the subsea solids cleaning unit 9 for deployment of the pre-connected complete system. The drilling system is used in shallow and medium water depth environments, pressurized seawater is pumped from a drilling platform to the underwater jet pump unit 13, the underwater jet unit 13 is communicated with the underwater solid cleaning unit 9, and the solids and liquid in a well bore are sucked out and discharged to the seabed in a region far away from the well bore by negative pressure generated in the underwater jet unit 13.

The rig 4 further comprises a drill pipe 6 and a drilling assembly 12, the drill pipe 6 being fixedly connected to the drilling assembly 12, the drill pipe 6 extending from the location of the drilling centre 5 to the seabed for drilling the borehole.

In a preferred embodiment, the shallow water drilling solid waste cleaning system comprises a suction hose 14, a underwater jet unit 13, a discharge hose 16, a power hose 17, a power plant 19 and a control module; the underwater jet unit 13 is provided with a suction inlet, a discharge outlet and a power interface, a suction hose 14 is communicated with the suction inlet, a discharge hose 16 is communicated with the discharge outlet, one end of the power hose 17 is communicated with the power interface, and the other end of the power hose 17 is communicated with a power device 19; the power device 19 is electrically connected with the control module. The solid-liquid waste 26 generated by drilling is discharged through the action of the safety valve, the back flush valve 33 and the jet pump, and the fluid 15 with the wellbore solids flows to the drill cuttings discharge area 35 without causing adverse effects on the drilling operation. The suction hose 14 is lowered to the sea floor using a cable winch 20 and the discharge hose 16 is lowered to the sea floor using a glide lock.

In the preferred embodiment, the underwater injection unit 13 includes a safety valve, a back flush valve 33, and an injection pump, an inlet of the safety valve is communicated with the suction hose 14, an outlet of the safety valve is communicated with an inlet of the back flush valve 33, an outlet of the back flush valve 33 is communicated with an inlet of the injection pump, and an outlet of the injection pump is communicated with the discharge hose 16; the power hose 17 is connected between the safety valve and the back flush valve 33. When the pipeline is blocked, the back-flushing valve is closed to perform back-flushing operation, so that the problem of blockage is automatically solved. During the back flushing process, if the pressure in the pipeline is overlarge, the safety valve is automatically opened to discharge the seawater, so that the pressure in the pipeline is restored to the normal range.

In a preferred embodiment, the wellbore clearing system further comprises a counterweight unit 8, the counterweight unit 8 being fixedly connected to the discharge hose 16 and being located at an end of the discharge hose 16 remote from the subsea jet unit 13. The counterweight unit 8 can fix the position of the discharge hose 16, and the discharge hose 16 can sink on the seabed 2 against the buoyancy of the seawater 3, and in addition, in the process of discharging the solid-liquid waste 26, the discharge position can be changed by moving the counterweight unit 8, the position of discharging the solid-liquid waste 26 can be flexibly changed, and the use is flexible and convenient. Specifically, the shallow water drilling solid waste cleaning system further comprises a winch 20 and a winch rope 18, wherein one end of the winch rope 18 is fixedly connected with the counterweight unit 8, and the other end of the winch rope 18 is connected with the winch 20. The discharging position is changed by the winch 20 and the winch rope 18, and the discharging position is easier and more convenient. In use, the engineering vessel 21 and the wireline 27 are used to place the counterweight unit 8 into the sea floor and to move the counterweight unit 8 into position. Further, the counterweight unit 8 may be fixedly connected to the winch cable 18 using a float 40 during use, such that one end of the winch cable 18 floats on the sea surface 1.

In the preferred embodiment, the system further comprises an umbilical cable and a control module, the control module is arranged on the drilling platform 4, one end of the umbilical cable is connected with the control module, the other end of the umbilical cable is connected with the power device 19, the shallow water drilling solid waste cleaning system further comprises a winch 20, and the umbilical cable or/and the power hose 17 are wound on the winch 20. Specifically, power device 19 is the sea water pump, and the sea water pump is close to the control module group setting, and power hose 17 coils on winch 20, still is connected with cross-over connection hose 24 between sea water pump and the winch 20. The condition is suitable for a drilling system in a shallow sea area.

In the preferred embodiment, the underwater waste cleaning unit 9 comprises a fixed seat and a guide pipe, the fixed seat is fixedly connected with the guide pipe, the fixed seat is provided with a rotation preventing plate 39, and the rotation preventing plate 39 enables the fixed seat to be fixed more firmly. A waste chamber is formed in the middle of the holder and is in communication with the catheter, an upper suction port 28 is provided in the catheter and is in communication with the catheter, and a lower suction port 29 is provided in the holder and is in communication with the waste chamber. When the device is used, the fixed seat is inserted into the seabed and fixed on the seabed, so that the position of a drilled well is fixed.

In the preferred embodiment, the control switch is a remote suction switch 37, and the shallow water drilling solid waste cleaning system further comprises a control module connected to the remote suction switch 37. The remote suction diverter 37 can be remotely controlled by a remote control device to control the communication of the upper suction port 28 and the lower suction port 29 with the shallow water drilling solid waste disposal system.

Referring to fig. 2-6, the present invention also provides a method of drilling a well, comprising the steps of:

digging an excavation area 22 for erecting a drilling assembly on the seabed 2;

the drilling assembly is secured within the excavated area 22 while the shallow water drilling solid waste cleanup system is placed on the drilling platform into the seafloor.

Because the seabed 2 in shallow sea areas such as Bohai Bay is soft and is not suitable for drilling operation, before drilling, a hard bottom layer is dug to form an excavated area 22, and then the drilling device is arranged in the excavated area 22. Installation of shallow water drilling solid waste disposal systems is accomplished entirely on the rig and then lowered to the seafloor by the winch lines 18, since shallow sea visibility is not suitable for underwater operations by underwater robots or divers.

Performing drilling operation in a drilling area by using the drilling platform 4 and the drilling assembly;

shallow water drilling solid waste cleanup systems are used to discharge the produced water from the drilling process to sea areas outside the drilling area. The drilling fluid 23 conveyed by the drilling platform 4 enters the drill bit of the drilling assembly 12 from the drill rod 6, the drilling fluid 23 returned from the outside of the drill rod 6 is mixed with solid waste to form solid-liquid waste 26, the solid-liquid waste 26 does not exceed a contact interface 25 of the drilling fluid and seawater, then the liquid is discharged from an upper suction port 28, the solid is discharged from a lower suction port 29, and the solid is discharged to a drilling cuttings discharge area 35 far away from a drilling area through a shallow water drilling solid waste cleaning system.

When erecting the open hole drilling device on the seabed 2, the underwater solid cleaning unit 9 is installed by lowering, and the well bore 7 is drilled on the seabed 2 by using the drilling mechanism. The lowering tool 10 is locked to the subsea solids cleaning unit 9 by a lowering tool lock 11. The lowering tool 10 is used to deploy the subsea solids cleaning unit 9 and fall to a final location. The lowering tool 10 is mounted on the drill pipe 6 and the bottom hole assembly 12 can be disconnected from the lowering tool 10 and drilling commenced while the lowering tool 10 is still in place, and when it is desired to replace a different size bottom hole assembly 12 or to install the first conductor, the lowering tool 10 and bottom hole assembly 12 are first disconnected from the subsea solids cleaning unit 9, as shown in figure 7. When the underwater jet pump unit 13 is in operation, the flapper valve 30 in the lowering tool 10 controls the entry of seawater 3 into the underwater solids cleaning unit 9.

The utility model discloses a need not underwater robot or diver and help the shallow water drilling system who clears up the wastes material can clear up automatically and fall the fixed and unnecessary drilling fluid 23 that the drilling produced, high-efficient, nimble and convenient.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "preferred embodiment," "yet another embodiment," "other embodiments," or "specific examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A shallow water drilling system without the need for an underwater robot or diver to assist in the cleaning of waste comprising a drilling platform and a drilling assembly; the drilling assembly comprises an underwater waste cleaning unit, wherein an upper suction port and a lower suction port are arranged on the underwater waste cleaning unit; the drilling system also comprises a shallow water drilling solid waste cleaning system, wherein the upper suction port and the lower suction port are communicated with the shallow water drilling solid waste cleaning system, and a control switch is arranged on a pipeline from the upper suction port and the lower suction port to the shallow water drilling solid waste cleaning system; this shallow water drilling system still includes instrument, control module and the solid cleaning unit under water of transferring, the instrument of transferring is including transferring instrument lock and umbilical, control module with the umbilical is connected, be provided with the locking groove on the solid cleaning unit under water, the umbilical with the instrument of transferring is connected, makes the instrument of transferring lock can insert voluntarily in the locking groove.

2. The shallow water drilling system for waste cleaning without assistance of an underwater robot or diver as claimed in claim 1, wherein the shallow water drilling solid waste cleaning system comprises a suction hose, an underwater jet unit, a discharge hose, a power plant and a control module; the underwater jet unit is provided with a suction inlet, a discharge outlet and a power interface, the suction hose is communicated with the suction inlet, the discharge hose is communicated with the discharge outlet, one end of the power hose is communicated with the power interface, and the other end of the power hose is communicated with the power device; the power device is electrically connected with the control module.

3. The shallow water drilling system without assistance of an underwater robot or diver in cleaning waste as claimed in claim 2, wherein the underwater injection unit comprises a safety valve, a back flush valve and an injection pump, an inlet of the safety valve is communicated with the suction hose, an outlet of the safety valve is communicated with an inlet of the back flush valve, an outlet of the back flush valve is communicated with an inlet of the injection pump, and an outlet of the injection pump is communicated with the discharge hose; the power hose is communicated between the safety valve and the back flush valve.

4. A shallow water drilling system without the need for an underwater robot or diver to assist in the cleaning of waste as claimed in claim 2, wherein the wellbore cleaning system further comprises a counterweight unit fixedly connected to the discharge hose and located at an end of the discharge hose remote from the underwater jet unit.

5. The shallow water drilling system without assistance of an underwater robot or diver for waste cleaning as claimed in claim 4, further comprising a winch and a winch rope, one end of said winch rope being fixedly connected to said counterweight unit and the other end being connected to said winch.

6. The shallow water drilling system without assistance of an underwater robot or diver in cleaning waste as claimed in claim 1, further comprising an umbilical and a control module, wherein the control module is disposed on the drilling platform, one end of the umbilical is connected to the control module and the other end is connected to a power unit, the shallow water drilling solid waste cleaning system further comprises a winch, and the umbilical or power hose is coiled around the winch.

7. The shallow water drilling system without assistance of an underwater robot or diver in waste cleaning as claimed in claim 6, wherein the power plant is a sea water pump electrically connected to the control module, the sea water pump being disposed adjacent to the control module, and a jumper hose being connected between the sea water pump and the winch.

8. The shallow water drilling system for assisting in cleaning of waste without an underwater robot or diver as claimed in claim 1, wherein the underwater waste cleaning unit comprises a holder fixedly connected with the guide pipe and a guide pipe, a waste chamber is formed at a middle portion of the holder and communicated with the guide pipe, the upper suction port is provided at the guide pipe and communicated with the guide pipe, and the lower suction port is provided at the holder and communicated with the waste chamber.

9. The shallow water drilling system without assistance of an underwater robot or diver in cleaning waste as claimed in claim 1, wherein the control switch is a remote control suction circuit changer, and the shallow water drilling solid waste cleaning system further comprises a control module connected with the remote control suction circuit changer.