CN213039226U

CN213039226U - Novel submarine coiled tubing drilling machine

Info

Publication number: CN213039226U
Application number: CN202021207651.5U
Authority: CN
Inventors: 肖文生; 刘占鹏; 崔俊国; 梅连朋; 赵海洋; 谭利萍
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-04-23
Anticipated expiration: 2030-06-28

Abstract

The invention discloses a novel submarine continuous pipe drilling machine and a drilling method in the field of drilling equipment. The system comprises a control base station, a pipe cable system, a centralized valve seat, a solid control system, an integrated platform, a continuous pipe system, a power drilling tool and a wellhead device. The control base station is positioned on the barge and provides power and signals for the seabed module through a pipe cable system; the centralized valve seat divides the lines to each execution and control mechanism; the solid control system is positioned on the seabed, and drilling fluid does not need barge storage and umbilical cable conveying; the drilling fluid is purified at the seabed without returning to a barge; the integrated platform has the functions of pneumatic control floating and sinking, directional submerging and seabed fastening, and the movement of the platform is not limited by a seabed soft mud layer; the coiled tubing system drives the coiled tubing to directly reach a target stratum by one-time drilling through the injection head without casing running and bit changing, and the drilling depth is not limited by the casing capacity; the power drilling tool comprises a drill bit, a permanent magnet motor and a locking device, wherein the permanent magnet motor directly drives the drill bit; after the locking device is unlocked, the power drilling tool is salvaged and recovered by the rope, and the continuous pipe reserves the stratum to be used as a sleeve.

Description

Novel submarine coiled tubing drilling machine

Technical Field

The invention relates to the technical field of drilling equipment, in particular to a novel submarine continuous pipe drilling machine.

Background

In the field of drilling equipment, a submarine drilling rig is mainly used for submarine geological investigation and resource exploration at present, a drill column is adopted for drilling to realize a core sampling function, and the drilling depth of the submarine drilling rig is limited due to the capacity limitation of the drill column; the conventional submarine continuous pipe drilling machine can effectively solve the problem that the drilling depth of the submarine drilling machine is limited, but is still limited by the casing capacity, and the technology is complex and the reliability is not high in practical submarine drilling application, and casing running exists; changing a drill bit; purifying the drilling fluid; moving underwater; drilling tool recovery and the like. In order to solve the technical problems of the conventional submarine drilling rig, a novel submarine continuous pipe drilling rig is provided.

Disclosure of Invention

The invention discloses a novel submarine continuous pipe drilling machine in the technical field of drilling equipment. The invention comprises a control base station, a pipe cable system, a centralized valve seat, a solid control system, an integrated platform, a continuous pipe system, a power drilling tool and a wellhead device.

The control base station is arranged on a barge and provides the pneumatic and electric power and the control signal for the seabed module of the seabed continuous pipe drilling machine through an umbilical cable.

An umbilical cable of the pipe cable system is connected with the centralized valve seat, and is connected with each executing and controlling mechanism after being shunted by the valve seat, wherein the fixed control cable provides power and signals for the fixed control system; the slurry supply pipeline supplies drilling fluid for the roller, and the drilling fluid enters the power drilling tool through the continuous pipe; after the drilling fluid returns to the wellhead, the drilling fluid returns to the solid control system through a slurry return pipeline; the pipe cable system is positioned along with the fixed control system by lowering the seabed, and is quickly connected by an underwater robot;

the centralized valve seat is a sealing structure and is used for branching each actuating mechanism and each control mechanism of the pipe cable system;

the solid control system stores drilling fluid and cement, is an integral sealing system, and comprises a mud tank, a mud pump, a vibrating screen, a desander, a conveyor and other drilling fluid purification equipment, and is used for storing and purifying the drilling fluid and treating rock debris; the drilling fluid does not need barge storage and umbilical cable transportation, and can be stored and purified only at the seabed, so that the barge, umbilical cable structure and drilling process flow are greatly simplified;

the integrated platform comprises a buoyancy tank, a walking device and a fixing device, and is used for bearing and fixing the centralized valve seat and the continuous pipe system; the integrated platform is controlled to float and sink through the inflation and deflation control of the buoyancy tank, is directionally submerged through the multidirectional propeller of the walking device, and is fastened with the seabed through the spiral cone of the fixing device, so that the movement of the integrated platform is not limited by the seabed soft mud layer; the buoyancy tank is fully sealed, the umbilical cable provides a buoyancy and sinking control air source, and the sealing performance is monitored in real time.

The continuous pipe system comprises a roller, a derrick, an injection head and a continuous pipe, which are all arranged on the integrated platform, the roller stores and releases the continuous pipe, and a drilling fluid interface is arranged; the derrick is arranged above the wellhead, and is used for fixing and driving the injection head to move up and down so as to recover the power drilling tool;

the power drilling tool comprises a drill bit, a permanent magnet motor and a locking device, wherein one end of the permanent magnet motor is connected with the coiled tubing through the locking device, and the other end of the permanent magnet motor directly drives the drill bit to perform drilling operation. After the operation is finished, the locking device is unlocked, and the permanent magnet motor and the drill bit can be recovered by adopting a rope to realize recycling.

The wellhead assembly includes a blowout preventer and a wellhead base for pressure control and drilling fluid diversion.

Preferably, the solid control system stores drilling fluid and cement, and barges do not need to store and transmit umbilical cables when drilling and cementing wells, so that the structures of the barges and the umbilical cables are greatly simplified;

preferably, the solid control system comprises drilling fluid purification and rock debris treatment equipment, drilling fluid does not need to return to a barge on the sea surface, the self-circulation of seabed purification can be realized, and the solid control process is greatly simplified;

preferably, the fixed control system and the centralized valve seat adopt a sealing structure, and the sealing performance is monitored in real time;

preferably, the integrated platform is provided with a buoyancy tank, a walking device and a fixing device, so that the movement of the integrated platform is not limited by a seabed soft mud layer, and pneumatic control floating, directional submerging and seabed fastening can be realized;

preferably, the continuous pipe system adopts a one-trip drilling technology, casing pipe running and drill bit changing are not needed, the drilling depth is not limited by the capacity of a drill string and the casing pipe, and the drilling machine is simple and compact in structure and high in practicability.

Preferably, the coiled tubing is left in the seabed formation for use as casing after the drilling operation is completed;

preferably, the integrated platform and the continuous pipe system are electrically driven, and air charging and discharging are carried out to realize sinking and floating;

preferably, the permanent magnet motor and the drill bit can be salvaged and recycled by using a rope, so that the recycling is realized.

The technical scheme of the embodiment of the invention has the following advantages:

1. the invention provides a novel submarine continuous pipe drilling machine. The integrated platform realizes the floating and sinking of the buoyancy tank through the air supply of the umbilical cable, realizes the directional underwater navigation through the walking device, and realizes the seabed fastening through the fixing device, so that the movement of the integrated platform is not limited by a seabed soft mud layer any more; the continuous pipe system adopts a one-trip drilling technology, casing pipe running and bit changing are not needed, so that the drilling depth is not limited by the capacity of a drill string and the casing pipe, and the structure of the drilling machine is compact; the solid control system stores the drilling fluid and the cement, and barge storage and umbilical cable conveying are not needed during drilling and cementing, so that the structures of the drilling fluid and the cement are greatly simplified; the permanent magnet motor and the drill bit can be salvaged and recovered by using the rope through unlocking the locking device, so that the recycling is realized, and the cost is greatly reduced.

2. The invention adopts a one-trip drilling technology to realize one-time drilling into a target stratum without tripping out, casing and bit replacement are not needed, and after the drilling operation is finished, the indwelling continuous pipe is used as a casing in a seabed stratum, so that the drilling process flow is greatly simplified; the solid control system is a seabed sealing system, and comprises drilling fluid purification and rock debris treatment equipment, the drilling fluid can realize seabed purification self-circulation without returning to a sea surface barge, the solid control process is greatly simplified, the safety and the reliability of the system are greatly improved, and the cost is greatly reduced.

The invention solves a plurality of problems in the practical application of the conventional submarine drilling rig, and ensures that the submarine drilling rig has compact structure, strong practicability, reduced drilling cost, simplified drilling and production process and improved reliability. The invention is suitable for the exploitation of seabed natural gas hydrate and seabed oil gas and the sampling of seabed deep rock core.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a specific example of a subsea continuous tubular drilling rig in embodiment 1 of the present invention;

reference numerals: 1-control base station, 2-pipe cable system, 21-umbilical cable, 22-mud return pipeline, 23-solid control cable, 24-mud supply pipeline, 3-centralized valve seat, 4-solid control system, 5-integrated platform, 51-buoyancy tank, 52-walking device, 53-fixing device, 6-coiled pipe system, 61-roller, 62-derrick, 63-injection head, 64-coiled pipe, 7-power drilling tool, 71-drilling head, 72-permanent magnet motor, 73-locking device and 8-wellhead device.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In describing the present invention, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and/or "comprising," when used in this specification, are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; the two elements can be directly connected, indirectly connected through an intermediate medium, or communicated with each other inside; either a wireless or a wired connection. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a subsea continuous pipe drilling rig, as shown in fig. 1, comprising: the system comprises a control base station 1, a pipe cable system 2, a centralized valve seat 3, a solid control system 4, an integrated platform 5, a continuous pipe system 6, a power drilling tool 7 and a wellhead device 8.

The control base station 1 is installed on a barge and provides the pneumatic and electric power and control signals for the seabed module of the seabed continuous pipe drilling machine through an umbilical cable 21.

An umbilical cable 21 of the pipe cable system 2 is connected with the centralized valve seat 3 and is connected with each executing and controlling mechanism after being shunted by the valve seat, wherein a fixed control cable 23 provides power and signals for the fixed control system 4; the slurry supply pipeline 24 supplies drilling fluid for the roller 61, and the drilling fluid enters the power drilling tool 7 through the continuous pipe 64; after the drilling fluid returns to the wellhead, the drilling fluid returns to the solid control system 4 through a slurry return pipeline 22; the pipe cable system 2 is positioned along with the solid control system 4 by lowering the seabed, and is quickly connected by an underwater robot;

the centralized valve seat 3 is a sealing structure and divides the cable system 2 into various actuating mechanisms and control mechanisms;

the solid control system 4 stores drilling fluid and cement, is an integral sealing system, and is internally provided with drilling fluid purification equipment for storing and purifying the drilling fluid and treating rock debris; the drilling fluid can be stored and purified on the seabed;

the integrated platform 5 comprises a buoyancy tank 51, a walking device 52 and a fixing device 53, and is used for bearing and fixing the centralized valve seat 3 and the continuous pipe system 6; the integrated platform 5 is controlled to float and sink through the inflation and deflation control of the buoyancy tank 51, is directionally submerged through the multi-directional propeller of the walking device 52, and is fastened with the seabed through the spiral cone of the fixing device 53, so that the movement of the integrated platform 5 is not limited by the seabed soft mud layer; the buoyancy tank 51 is fully sealed, a floating and sinking air source is provided by the umbilical cable 21, and the sealing performance is monitored in real time.

The continuous pipe system 6 comprises a roller 61, a derrick 62, an injection head 63 and a continuous pipe 64 which are all arranged on an integrated platform, and the roller 61 stores and releases the continuous pipe 64 and is provided with a drilling fluid interface; the derrick 62 is arranged above the wellhead, fixes and drives the injection head 63 to move up and down so as to recover the power drilling tool;

the power drilling tool 7 comprises a drill bit 71, a permanent magnet motor 72 and a locking device 73, wherein one end of the permanent magnet motor 72 is connected with the coiled tubing through the locking device 73, and the other end of the permanent magnet motor is directly driven by the drill bit 71 to drill. The locking device 73 is unlocked, and the permanent magnet motor 72 and the drill bit 71 can be recovered by throwing and fishing ropes, so that the recycling is realized.

Wellhead assembly 8 includes blowout preventer 81 and wellhead base 82 for pressure control and drilling fluid diversion.

Preferably, the solid control system 4 stores drilling fluid and cement, and no barge storage and umbilical cable 21 transportation are needed during drilling and cementing, so that the structure of the barge and the umbilical cable 21 is greatly simplified;

preferably, the solid control system 4 contains drilling fluid purification and rock debris treatment equipment, drilling fluid does not need to return to a barge on the sea surface, the self-circulation of seabed purification can be realized, and the solid control process is greatly simplified;

preferably, the solid control system 4 and the centralized valve 3 seat adopt sealing structures, and the sealing performance of the solid control system and the centralized valve is monitored in real time;

preferably, the integrated platform 5 is provided with a buoyancy tank 51, a walking device 52 and a fixing device 53, so that the movement of the integrated platform is not limited by a seabed soft mud layer, and pneumatic control floating, directional submerging and seabed fastening can be realized;

preferably, the continuous pipe system 6 adopts one-time drilling technology, casing pipe running and bit changing 71 are not needed, so that the drilling depth is not limited by the capacity of a drill string and the casing pipe, and the drilling machine is simple and compact in structure and high in practicability.

Preferably, the coiled tubing 74 is left in the subsea formation for use as casing after the drilling operation is completed;

preferably, the integrated platform 5 and the continuous pipe system 6 are electrically driven, inflated and deflated;

preferably, the permanent magnet motor 72 and the drill bit 71 are salvaged and recycled by using a rope.

The integrated platform 5 of the novel submarine continuous pipe drilling machine realizes the floating and sinking of the buoyancy tank 51 through the air supply of the umbilical cable 21, realizes the directional underwater navigation through the walking device 52, and realizes the submarine fastening through the fixing device 53, so that the movement of the integrated platform 5 is not limited by a submarine soft mud layer any more; the continuous pipe system 6 adopts a one-trip drilling technology, casing pipe running and bit changing 71 are not needed, so that the drilling depth is not limited by the capacity of a drill string and the casing pipe, and the structure of the drilling machine is compact; the solid control system 4 of the invention stores drilling fluid and cement, and no barge is required to store and transmit by the umbilical cable 21 during drilling and cementing, so that the structures of the drilling fluid and the cement are greatly simplified; the permanent magnet motor 72 and the drill bit 71 can be salvaged and recovered by using the rope by unlocking the locking device 73, so that the recycling is realized, the cost is greatly reduced, and the safety and the reliability of the system are greatly improved.

The novel seabed continuous pipe drilling machine adopts a one-trip drilling technology to realize that the target stratum is drilled in one time without tripping out, casing and bit changing 71 are not needed, and after the drilling operation is finished, the indwelling continuous pipe 64 is used as a casing in the seabed stratum, so that the drilling process flow is greatly simplified; the solid control system 4 is a seabed sealing system, and comprises drilling fluid purification and rock debris treatment equipment, so that the drilling fluid can realize seabed purification self-circulation without returning to a sea surface barge, the solid control process is greatly simplified, and the cost is greatly reduced.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A novel subsea coiled tubing rig, comprising: the system comprises a control base station (1), a pipe cable system (2), a centralized valve seat (3), a solid control system (4), an integrated platform (5), a continuous pipe system (6), a power drilling tool (7) and a wellhead device (8);

the control base station (1) is positioned on a barge on the sea surface and provides gas, electric power and control signals for the seabed equipment through an umbilical cable (21);

an umbilical cable (21) of the umbilical cable system (2) is connected with the centralized valve seat (3) and is connected with each execution and control mechanism after being shunted by the valve seat, wherein the solid control cable (23) provides power and signals for the solid control system (4); a slurry supply pipeline (24) supplies drilling fluid for the roller (61), and the drilling fluid enters the power drilling tool (7) through a continuous pipe (64); the drilling fluid returns to the wellhead and then returns to the solid control system (4) through a slurry return pipeline (22);

the centralized valve seat (3) is a sealing structure and is used for branching each actuating mechanism and each control mechanism of the pipe cable system (2);

the solid control system (4) stores drilling fluid and cement, is an integral sealing system, comprises a mud tank, a mud pump, a vibrating screen, a sand remover, a conveyor and other drilling fluid purifying equipment, and is used for storing and purifying the drilling fluid and treating rock debris; the drilling fluid does not need barge storage and umbilical cable transportation, and can be stored and purified only at the seabed, so that the barge, umbilical cable structure and drilling process flow are greatly simplified;

the integrated platform (5) comprises a buoyancy tank (51), a walking device (52) and a fixing device (53), and is used for bearing and fixing the centralized valve seat (3) and the continuous pipe system (6); the integrated platform (5) is controlled to float and sink through the inflation and deflation control of a buoyancy tank (51), is directionally submerged through a multi-directional propeller of a walking device (52), is fastened with the seabed through a spiral cone of a fixing device (53), and is not limited by a seabed soft mud layer when moving; the buoyancy tank (51) is fully sealed, a buoyancy and sinking control air source is provided by an umbilical cable, and the sealing performance is monitored in real time;

the coiled tubing system (6) comprises a roller (61), a derrick (62), an injection head (63) and a coiled tubing (64), which are all arranged on the integrated platform (5), and the roller (61) stores and releases the coiled tubing and is provided with a drilling fluid interface; the derrick (62) is arranged above the wellhead, fixes and drives the injection head (63) to move up and down so as to recover the power drilling tool (7);

the power drilling tool (7) comprises a drill bit (71), a permanent magnet motor (72) and a locking device (73), one end of the permanent magnet motor (72) is connected with the continuous pipe (64) through the locking device (73), and the other end of the permanent magnet motor directly drives the drill bit (71) to drill; after the operation is finished, the locking device (73) is unlocked, and the permanent magnet motor (72) and the drill bit (71) can be salvaged and recovered by using a rope and can be recycled;

the wellhead device (8) comprises a blowout preventer and a wellhead base and is used for controlling pressure and guiding drilling fluid.

2. Subsea continuous pipe drilling rig according to claim 1, characterized in that the centralized valve seat (3) and the solid control system (4) are placed in a watertight enclosure.

3. Subsea continuous pipe drilling rig according to claim 1, characterized in that the solid control system (4) stores drilling fluid and cement, the drilling fluid being stored and purified only on the seabed without barge storage and umbilical transport.

4. Subsea coiled tubing rig according to claim 1, wherein the integrated platform (5) is buoyant by compressed air, submersible and stationary on the seabed.

5. Subsea coiled tubing rig according to claim 1, wherein the coiled tubing system (6) comprises a drum (61), a derrick (62), an injection head (63) and coiled tubing (64), the drum (61) being used for storing and releasing coiled tubing.

6. Subsea coiled tubing drilling rig according to claim 1, wherein the power drill (7) comprises a drill bit (71), a permanent magnet motor (72) and a locking device (73), one end of the permanent magnet motor (72) being connected to the coiled tubing (64) via the locking device (73) and the other end directly driving the drill bit (71) for drilling operations.

7. Subsea continuous pipe drilling rig according to claim 1, characterized in that the integrated platform (5) and the continuous pipe system (6) are electrically driven.

8. Subsea continuous tube drilling rig according to claim 5, characterized in that the derrick (62) is mounted above the wellhead, securing and driving the injection head (63) up and down for recovery of the power drill (7).

9. Subsea continuous pipe drilling rig according to claim 6, characterized in that the output of the permanent magnet motor (72) directly drives the drill bit (71) for drilling operations.

10. The subsea continuous pipe drilling rig according to claim 6, wherein after the locking device (73) is unlocked, the permanent magnet motor (72) and the drill bit (71) can be recovered by rope fishing for recycling.