Well drilling return guiding seabed foundation device

Abstract

The invention discloses a drilling return guiding seabed foundation device, which relates to the technical field of seabed drilling and comprises a seabed base plate device positioned at the lower part and a traction device positioned at the upper part, the seabed basal disc device comprises a basal disc wellhead and a basal disc clamp which are arranged on a seabed basal disc frame; the seabed base plate frame is connected with the traction device through a cable; the traction device comprises a traction frame, the middle of the traction frame is a butt joint pipe opening, an electrical butt joint device is installed on one side of the traction frame, the ship draws an electrical butt joint through a winch, and the electrical butt joint is guided by a pulley to be lowered into water to be connected with the electrical butt joint device. The position of the seabed base device is determined through a positioning signal, the seabed base plate device and the traction device are connected through a cable and can be retracted and released according to operation requirements, and guide butt joint of drill rods is achieved. A novel drill rod guiding butt joint method is adopted, and the success rate of well drilling return butt joint under the large-depth environment can be effectively increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean drilling, in particular to a drilling reentry guiding seabed foundation device. BACKGROUND

[0002] When carrying out ocean drilling operation, in addition to the drilling machine on the operation ship as the operation foundation, auxiliary equipment is also needed to ensure the smooth progress of the drilling operation, and the most important part is the seabed foundation device. The seabed foundation device is an operation support structure device for the drilling operation to be located on the seabed surface, which can provide functions such as guiding, clamping, cutting, state monitoring for the drilling rod, and can play the roles of wellhead support, drilling monitoring and wellhead plugging effect, and is the core component for maintaining the orderly progress of the drilling operation and preventing damage to the operation equipment and environment.

[0003] However, the current technology still has obvious technical deficiencies in one aspect, i.e. drilling reentry technology. When the operation ship cannot complete the operation at one drilling hole position at one time or needs to carry out operation on the drilling hole at a later stage, drilling reentry is needed. At present, the operation ship and platform mainly navigate by positioning record and positioning acoustic beacon to the exact position above the original operation position. Such offshore operation ships and platforms generally have dynamic positioning equipment, so the ship and platform can be stably stopped at the specified position. After completing the positioning of the ship, the drilling rod is reconnected and lowered, and the docking with the seabed foundation is attempted, during which underwater equipment such as ROV can be used for state monitoring. This method is relatively applicable in shallow water environment, because the water depth is shallow, the drilling rod is less affected by the ship and ocean current, the drilling is relatively stable, and the possibility of completing docking is larger. However, as the operation depth increases, the mass of the underwater part of the drilling rod becomes larger and larger, and the influence of the ocean current becomes more and more obvious, and the stability requirement of the operation platform and ship becomes higher and higher, which makes the operation difficulty rise exponentially. Even if the underwater robot is used for direct guidance, it is also difficult to succeed, and the long-distance and deep-water operation condition becomes the core pain point.

[0004] Therefore, it is necessary to propose a new type of seabed foundation device. SUMMARY

[0005] The purpose of the present application is to provide a drilling reentry guiding seabed foundation device to solve the problems existing in the prior art, and to use a new type of drilling rod guiding and docking method to effectively improve the success rate of drilling reentry docking in deep water environment.

[0006] To achieve the above object, the present application provides the following scheme: the present application provides a drilling reentry guiding seabed foundation device, which comprises a seabed base device located at a lower part and a traction device located at an upper part; the seabed base device comprises a base wellhead and a base clamp provided on a seabed base frame, a drill rod passes through the base wellhead and is clamped by the base clamp; the seabed base frame is connected with the traction device through a cable;

[0007] The traction device comprises a traction frame, a middle part of the traction frame is a butt joint pipe opening, one side of the traction frame is provided with an electrical butt joint device, a ship pulls the electrical butt joint joint through a winch, the electrical butt joint joint is guided to be lowered into water through a pulley and is connected with the electrical butt joint device; the seabed foundation device is linked with a ship signal through a positioning signal.

[0008] In an embodiment, the seabed base device further comprises a battery cabin and a measurement and control cabin A, both of which are installed on the seabed base frame, the measurement and control cabin A is provided with an acoustic communication module, and the battery cabin is used for supplying power for the overall operation of the drilling reentry guiding seabed foundation device.

[0009] In an embodiment, the top of the seabed base frame is provided with two release devices, and the measurement and control cabin A is used for controlling the opening and closing of the clamp jaw of the base clamp and the working state of the release device.

[0010] In an embodiment, the seabed base frame is provided with a winch A and a winch B, the winch A is provided with a load cable, the load cable is used for connecting with the traction device and transmitting electric energy, and the winch B is provided with a positive buoyancy cable, the positive buoyancy cable is used for load traction with the traction device.

[0011] In an embodiment, a pair of traction clamps are installed in the butt joint pipe opening, and the traction clamps are used for preliminary butt joint and clamping of the drill rod.

[0012] In an embodiment, the electrical butt joint device is a barrel-shaped structure with a horn opening at the top, the electrical butt joint device is provided with an electrical interface capable of wet plugging under water; the bottom of the electrical butt joint device is connected with the load cable.

[0013] In an embodiment, one attitude control thruster is arranged in each of the four directions of the traction frame, the attitude control thruster is used for constant position and attitude of the traction device; the other side of the traction frame is provided with a measurement and control cabin B, and the measurement and control cabin B is used for controlling the attitude control thruster.

[0014] In an embodiment, a plurality of groups of floating balls are symmetrically distributed in the traction frame, and the floating balls are used for providing buoyancy for the floating of the whole traction device.

[0015] In an embodiment, a positioning beacon is further installed on the traction frame, and the positioning beacon is configured to send a position signal of the traction device; an ultra-short baseline positioning receiver is installed on the bottom of the ship, and the ultra-short baseline positioning receiver is configured to acquire the positioning signal sent by the positioning beacon on the traction device.

[0016] In an embodiment, the electrical docking joint is in an inverted conical column structure, an upper part of the electrical docking joint is connected with a load cable on the ship, and a thruster is distributed around the electrical docking joint; an electrical interface is arranged in a middle part of a lower part of the electrical docking joint; and a spherical camera is arranged at a front end of the lower part of the electrical docking joint.

[0017] The present application has the following beneficial technical effects compared with the prior art:

[0018] The drilling reentry guiding seabed foundation device comprises a seabed base device at a lower part and a traction device at an upper part; the seabed base device comprises a base wellhead and a base clamp arranged on a seabed base frame, a drill rod passes through the base wellhead and is clamped by the base clamp; the seabed base frame is connected with the traction device through a cable; the traction device comprises a traction frame, a middle part of the traction frame is a docking pipe, an electrical docking device is installed on one side of the traction frame, the ship pulls the electrical docking joint through a winch, the electrical docking joint is guided to be lowered into water through a pulley and connected with the electrical docking device. The drilling reentry guiding seabed foundation device determines the position of the seabed foundation device through a positioning signal, then the electrical docking joint is connected with the electrical docking device, the docking pipe is used to complete the guiding docking of the drill rod, the seabed base device and the traction device are connected through the cable, and the cable can be retracted or extended according to the operation requirement, so that the guiding docking of the drill rod is realized. The drilling reentry guiding seabed foundation device breaks through the general operation water depth limit and is suitable for most engineering operations using the seabed foundation device; the operation efficiency can be effectively improved, the time required for personnel operation and equipment positioning and alignment during the docking of the drill rod can be effectively shortened; the demand for the positioning of the operation ship and the operation precision of personnel is reduced, the error caused by long-distance operation delay is reduced, and the reentry docking success rate is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0020] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the drilling reentry guiding seabed foundation device;

[0021] Figure 2Top view of the drilling reentry guide seabed foundation device;

[0022] Figure 3 Schematic diagram of the arrangement of the ship-based foundation equipment;

[0023] Figure 4 Schematic diagram of the composition of the electrical docking joint;

[0024] Figure 5 Schematic diagram of the lower view of the seabed foundation device;

[0025] Figure 6 Schematic diagram of the floating of the traction device;

[0026] Figure 7 Schematic diagram of the reentry docking;

[0027] Figure 8 Schematic diagram of the drilling rod passing through the docking port during the reentry docking process;

[0028] Figure 9 Schematic diagram of the wellhead reentry completion of the drilling rod;

[0029] Figure 10 Schematic diagram of the separation of the ship and the seabed foundation device;

[0030] Figure 11 Electrical connection diagram of the drilling reentry guide seabed foundation device;

[0031] Figure 12 Principle diagram of the attitude control of the traction device;

[0032] Among them, 1, traction tongs; 2, floating ball; 3, electrical docking device; 4, attitude control thruster; 5, base disc tongs; 6, load cable; 7, winch A; 8, battery cabin; 9, seabed base disc frame; 10, docking port; 11, positioning beacon; 12, traction frame; 13, measurement and control cabin B; 14, release device; 15, base disc wellhead; 16, load steel cable; 17, winch B; 18, measurement and control cabin A; 19, electrical docking winch; 20, electrical docking joint; 21, ultra-short baseline positioning receiver; 23, electrical interface; 24, spherical camera. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0034] The purpose of the present invention is to provide a drilling re-entry guidance submarine basic device to solve the problems existing in the above-mentioned prior art. By adopting a new drill pipe guidance docking method, the success rate of drilling re-entry docking in a deep-sea environment can be effectively improved.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figures 1-12 As shown, the present invention provides a subsea foundation device for drilling re-entry guidance. The device is mainly divided into two parts, the lower part being the subsea base plate device, and the upper part being the traction device. The subsea base plate mainly consists of a subsea base plate frame 9, a base plate wellhead 15, and a base plate clamp 5. During downhole operations, the drill pipe passes through the base plate wellhead 15 and is clamped by the base plate clamp 5 to prevent the drill pipe from swinging with the ocean current, allowing downhole tools to operate stably. To adapt to deep-sea operating environments, the subsea base plate frame 9 is also equipped with a battery compartment 8 and a measurement and control compartment A18. Due to the deep water depth, the use of cables for power transmission places high demands on the ship's power system, and the drill pipe and cable extending from top to bottom are particularly prone to entanglement. Therefore, a cable-connected measurement and control method is not adopted. The measurement and control compartment A18 has the function of acoustic communication with the ship, enabling long-distance underwater signal reception and transmission and controlling the operation of the equipment. At the same time, the battery compartment 8 is used to power the entire equipment operation.

[0037] Winch A7 and winch B17 are mounted on the subsea template frame 9 and driven by electric motors. Winch A7 is equipped with a load cable 6, which connects to the upper traction device and transmits power. Winch B17 is equipped with a positive buoyancy cable, which can be a load cable 16. The load cable 16 is used to pull the load with the upper traction device. Two release devices 14 are also installed on the top of the subsea template frame 9. These control the opening and closing of the template clamp 5 through the measurement and control cabin A18, thereby fixing the position of the re-entry device under normal conditions.

[0038] The upper part of the seabed foundation device is a traction device for re-docking, which is mainly installed in the traction frame 12 made of high-strength lightweight material. The center of the traction device is the docking port 10, in which a pair of traction clamps 1 is installed for preliminary docking and clamping of the drill pipe to prepare for subsequent traction docking. One side of the traction frame 12 is provided with an electrical docking device 3, which is a barrel-shaped structure with a horn-shaped opening at the top, and has an electrical interface 23 capable of wet plugging under water. The bottom of the electrical docking device 3 is connected with the load cable 6, so that the electrical docking can be used to transmit electrical energy from the ship to the seabed foundation device. Four attitude control thrusters 4 are installed on the traction frame 12 in the four directions, which are used to maintain the position and attitude of the traction device. The other side of the traction frame 12 is provided with a control cabin B13 for controlling the attitude of the traction device. A plurality of groups of floating balls 2 are symmetrically distributed in the traction frame 12 to provide buoyancy for the floating of the entire traction device. A positioning beacon 11 is also installed on the traction frame 12 to send the position signal of the traction device.

[0039] In addition to the seabed foundation device itself, the drilling re-entry also requires the support of the ship-based equipment. In addition to the basic drilling system, the ship needs to pull the electrical docking connector 20 through the electrical docking winch 19, which is guided by the pulley and can be lowered from the moon pool position to the water. An ultra-short baseline positioning receiver 21 needs to be installed at the bottom of the ship, so that the positioning signal sent by the positioning beacon 11 on the traction device can be obtained.

[0040] The electrical docking connector 20 is a reverse conical column structure, the upper part is connected with the load cable 6, and a plurality of small thrusters 22 are distributed around to control the attitude and movement of the electrical docking connector 20. The lower part has an electrical interface 23 in the middle, which can realize the transmission of electrical energy after connecting with the docking device on the traction device. The front end of the lower part is a spherical camera 24 with a wide viewing angle, which can obtain video information during the lowering process.

[0041] As shown in Figures 5-10 , the operation process of the drilling re-entry guide seabed foundation device is as follows:

[0042] First, as shown in Figure 5 , the ship carries out normal offshore drilling engineering operation. Since there is no mechanical connection between the seabed foundation device and the ship, the drill pipe is first driven through the center of the seabed foundation device, the base disc clamp 5 clamps the drill pipe, and the seabed foundation device is lowered to the seabed surface together with the drill pipe during the connection process through the moon pool.

[0043] After completing a drilling operation, the drill pipe is recovered, the ship sails away, and the seabed foundation device remains on the seabed until the ship performs re-entry operation.

[0044] As shown inFigure 6 As shown, when the ship returns to a certain range of the seabed foundation device according to the previous navigation data, the ship can send a signal remotely. After the seabed foundation device receives the signal, the release device 14 will be opened, and the brakes of the winch A7 and the winch B17 will be released, so that the upper part of the traction device is lifted under the action of the floating ball 2.

[0045] During the lifting process, the control cabin B13 monitors the position and attitude of the traction device in real time, and controls the release degree of the brake of the four-way attitude control thruster 4 and the electrical docking winch 19, so that the attitude of the traction device is stable and on the same vertical position of the seabed foundation device. When the traction device is lifted to a certain distance from the sea surface, the winch A7 and the winch B17 complete the brake, and the positioning beacon 11 starts to send a positioning signal. By receiving the positioning signal, the ship can more accurately position the relative position between the traction device and the ship, and correct the ship's parking position to align the moon pool with the traction device, preparing for re-docking.

[0046] As shown, Figures 7-8 During the re-docking operation, the electrical docking connector 20 and the drill pipe are lowered at the same time. During the lowering process, the camera of the electrical docking connector 20 starts to obtain visual signals, searches for the traction device and provides visual guidance for the docking of the drill pipe.

[0047] With the aid of double position confirmation through vision and positioning signals, the drill pipe passes through the docking pipe port 10 of the traction device. Then, the electrical docking connector 20 is driven to insert into the electrical docking device 3, and is clamped by the traction clamp 1, completing the mechanical and electrical connection between the ship and the seabed foundation device.

[0048] Before completing the electrical docking, since the operation of the seabed docking device relies on the battery for power supply, in order to save energy, the electrical docking device 3 is lifted by the floating ball 2, and the attitude control thruster 4 is also maintained in the lowest operation state, only to maintain the attitude stability of the docking device itself.

[0049] As shown, Figure 9As shown, the electrical interface 3 can continue to maintain the connection for a period of time, and after the battery compartment 8 of the seabed base device is fully charged, the electrical interface 3 is disconnected. Until the electrical interface 20 is recovered and the drilling re-entry interface process is completed, the operation can be restarted.

[0050] As shown, the electrical interface 3 can continue to maintain the connection for a period of time, and after the battery compartment 8 of the seabed base device is fully charged, the electrical interface 3 is disconnected. Until the electrical interface 20 is recovered and the drilling re-entry interface process is completed, the operation can be restarted. Figure 10

[0051] It should be noted that, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims should be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0052] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above embodiment descriptions are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges can be changed. In conclusion, the content of the present description should not be understood as a limitation of the present application.​

Claims

1. A subsea basic device for drilling reentry guidance, characterized by: The subsea template assembly comprises a subsea template assembly located at the bottom and a traction device located at the top. The subsea template assembly comprises a template wellhead and a template clamp provided on a subsea template frame. The drill pipe passes through the template wellhead and is clamped by the template clamp. The subsea template frame is connected to the traction device via a cable. The traction device includes a traction frame, the middle part of which is a docking pipe port, and an electrical docking device is installed on one side of the traction frame. The ship tows the electrical docking connector through a winch, and the electrical docking connector is lowered into the water through a pulley and connected to the electrical docking device; the submarine basic device is linked to the ship signal through a positioning signal.

2. The drilling reentry guidance subsea basic device according to claim 1, characterized in that: The seabed base device also includes a battery compartment and a measurement and control compartment A, both of which are installed on the seabed base frame. The measurement and control compartment A has an acoustic communication module, and the battery compartment is used to power the overall operation of the drilling return guidance seabed basic device.

3. The drilling reentry guidance subsea basic device according to claim 2, characterized in that: Two release devices are installed on the top of the seabed template frame, and the measurement and control cabin A is used to control the opening and closing of the jaws of the template clamp and the working status of the release device.

4. The drilling reentry guidance subsea basic device according to claim 1, characterized in that: Winch A and winch B are installed on the seabed base frame. Winch A is equipped with a load cable, which is used to connect with the traction device and transmit electrical energy. Winch B is equipped with a positive buoyancy cable, which is used to carry out load traction with the traction device.

5. The drilling reentry guidance subsea basic device according to claim 1, characterized in that: A pair of traction clamps are installed in the butt joint, and the traction clamps are used for preliminary butt jointing and clamping of the drill pipe.

6. The drilling reentry guidance subsea basic device according to claim 4, characterized in that: The electrical docking device is a barrel-shaped structure with a trumpet-shaped top. An electrical interface capable of wet plugging and unplugging underwater is provided inside the electrical docking device. The bottom of the electrical docking device is connected to the load cable.

7. The drilling reentry guidance subsea basic device according to claim 1, characterized in that: An attitude control thruster is installed on each of the four sides of the traction frame, and the attitude control thruster is used to maintain the position and attitude of the traction device; a measurement and control cabin B is installed on the other side of the traction frame, and the measurement and control cabin B is used to control the attitude control thruster.

8. The drilling reentry guidance subsea basic device according to claim 1, characterized in that: A plurality of groups of floating balls are symmetrically distributed in the traction frame, and the floating balls are used to provide buoyancy for the entire traction device to float upward.

9. The drilling reentry guidance subsea basic device according to claim 1, characterized in that: A positioning beacon is also installed on the traction frame, and the positioning beacon is used to send a position signal of the traction device; an ultra-short baseline positioning receiver is installed on the bottom of the ship, and the ultra-short baseline positioning receiver is used to obtain the positioning signal sent by the positioning beacon on the traction device.

10. The drilling reentry guidance subsea basic device according to claim 1, characterized in that: The electrical docking connector has an inverted conical columnar structure, the upper part of which is connected to the load cable on the ship, and thrusters are distributed around the electrical docking connector; an electrical interface is provided in the middle of the lower part of the electrical docking connector; and a spherical camera is provided at the front end of the lower part of the electrical docking connector.

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