CN112145095A - Emergency release device and method with tie-back function - Google Patents
Emergency release device and method with tie-back function Download PDFInfo
- Publication number
- CN112145095A CN112145095A CN202011028683.3A CN202011028683A CN112145095A CN 112145095 A CN112145095 A CN 112145095A CN 202011028683 A CN202011028683 A CN 202011028683A CN 112145095 A CN112145095 A CN 112145095A
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- CN
- China
- Prior art keywords
- emergency release
- emergency
- head
- workover riser
- well
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/06—Releasing-joints, e.g. safety joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
- E21B33/038—Connectors used on well heads, e.g. for connecting blow-out preventer and riser
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
- E21B43/013—Connecting a production flow line to an underwater well head
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/12—Underwater drilling
Abstract
The invention discloses an emergency release device with a tie-back function and a method. The emergency releasing and well sealing device comprises an emergency releasing joint, a power system and a well sealing joint; the emergency release joint comprises an emergency release male head and an emergency joint female head, the emergency release male head is connected with the power system through an upper power pipeline, and the well shut-in joint is connected with the power system through a lower power pipeline; under the condition of emergency release, the upper workover riser is lifted upwards to separate the emergency release male head from the emergency release female head, and when the upper power pipeline is disconnected with the power system, the lower power pipeline provides power liquid for the well sealing joint to trigger well sealing action. The invention can be used for both conventional drilling operation ships and engineering ships, has strong adaptability and flexible and convenient operation, and can be widely applied to well workover operation of deep water oil and gas fields adopting an underwater wellhead development mode.
Description
Technical Field
The invention relates to an emergency release device with a tie-back function and a method, belonging to the technical field of workover in an underwater wellhead mode of an offshore oil and gas field.
Background
For an oil-gas well developed by adopting an underwater wellhead mode, a well workover riser is generally required to be adopted to establish a circulating channel between a floating drilling operation ship and the underwater wellhead in the well workover process. Because the floating drilling operation ship has the risk of positioning failure under the emergency conditions of typhoon, internal wave flow and the like, the drilling operation ship deviates from the safe operation range, and further serious accidents such as breakage of a workover riser or damage of an underwater wellhead and the like occur, an emergency release device needs to be arranged in the workover string, the emergency release of the workover riser and the wellhead is realized, and the safety of equipment and operators such as the workover riser, the underwater wellhead and the like is ensured. The conventional emergency release device usually adopts a remote control mode, the related matched equipment comprises a control box, a control pipe cable, a pipe cable roller and the like, and when the emergency release function is triggered, a control signal needs to be transmitted to an emergency release executing mechanism from a floating drilling operation ship through the control pipe cable to start a related release action. Although the mode can effectively realize the releasing function, the control logic and the related equipment are complex, the requirements on the bearing capacity and the deck space of the drilling operation ship are higher, the operation amount of the tie-back after releasing is increased, and the operation efficiency is lower.
Disclosure of Invention
The invention aims to provide a simple emergency release device with a tie-back function, which has a simple structure, does not need to install control equipment related to conventional release tie-back devices such as a control box, a control pipe cable, a pipe cable roller and the like, triggers a power system integrated with the emergency release device to start release and well sealing actions by lifting a workover riser upwards, and realizes the tie-back of a workover string by matching with a designed positioning device and an underwater robot.
The invention provides an emergency release device with a tie-back function, which comprises an emergency release head, a power system and a well sealing joint, wherein the emergency release head is connected with the power system;
the emergency release head comprises an emergency release male head and an emergency release female head, the emergency release male head is fixed on an upper workover riser connected with an operation ship, the emergency release female head is fixed on a lower workover riser connected with an underwater wellhead, when the emergency release male head is matched with the emergency release female head, the internal communication of the upper workover riser and the lower workover riser is realized, the emergency release male head and the lower workover riser are arranged in a sealing way, when the upper workover riser is lifted, the sealing arrangement plays roles in sealing a well hole (the upper workover riser and the lower workover riser) and delaying, and ensures that the well sealing joint has enough time to complete well sealing;
a retaining valve is arranged at the lower port of the emergency release male head, and when the emergency release male head is matched with the emergency release female head, the retaining valve is opened under the pushing action of the lower workover riser; when the emergency release male head is disengaged from the emergency release female head, the retention valve is closed to close the upper workover riser;
the emergency release male connector is connected with the power system through an upper power pipeline;
the well sealing joint is connected with the power system through a lower power pipeline;
under the condition of emergency release, the upper workover riser is lifted upwards to separate the emergency release male head from the emergency release female head, and when the upper power pipeline is disconnected with the power system, power liquid is provided for the well sealing joint through the lower power pipeline to trigger well sealing action.
In the emergency release device with the tie-back function, the retaining valve is preferably a baffle valve, has the function of sealing the workover riser, and can ensure that the well fluid retained in the upper workover riser cannot overflow to protect the marine environment when the working ship is released from the underwater wellhead, namely the emergency release male head is completely separated from the emergency release female head.
In the emergency release device with a tie-back function, a seal arrangement structure between the emergency release male head and the lower workover riser is as follows:
be fixed in a plurality of rigidity rings on the periphery wall of lower part workover tubular, the outer cladding of rigidity ring has elastic sealing material, works as emergent public head of liberation with during the workover riser cooperation of lower part, elastic sealing material is in emergent public head of liberation's extrusion produces deformation down, thereby realizes emergent public head of liberation with sealed between the workover riser of lower part.
In the emergency release device with a tie-back function described above, preferably, the elastic sealing material is arranged along a circumferential direction or an axial direction of the rigid ring.
In the emergency release device with a tie-back function, the emergency release male head and the emergency release female head are fixed by the shear pin;
the shearing pin is provided with a handle;
the shearing pin with be equipped with the interval between the female head of emergent liberation, make things convenient for underwater robot to snatch.
In the emergency release device with a tie-back function, the emergency release male head and the emergency release female head are positioned by matching the positioning male head with the positioning female head;
the positioning male head is arranged on the emergency release male head, and the positioning female head is arranged on the emergency release female head.
In the emergency release device with the tie-back function, the well sealing joint has the main functions of shearing the internal pipe column and sealing the shaft under the emergency release condition to realize well sealing so as to ensure that oil gas in the shaft cannot overflow the shaft to pollute the marine environment after the emergency release connector is released.
When the emergency release device with the tie-back function is used, the emergency release device can be used according to the following steps:
the underwater wellhead and the workover riser are connected through the emergency release device with the tie-back function;
when the working condition of emergent release takes place, upwards carry the upper portion workover riser, under the effect of lifting force, emergent release public head with emergent release female head begins to break away from, works as upper portion power pipeline with when the driving system disconnection, through lower part power pipeline does the shut-in well connects provides power liquid, triggers the action of shutting in the well.
That is, a valve is provided between the upper power line and the lower power line, and when the upper power line is disconnected from the valve, the lower power line is automatically connected.
When the male head of emergency release with the female head of emergency release does not break away from completely, the male head of emergency release with the effect of sealed well and time delay is played to the rigid circle between the workover riser of lower part, guarantees the shut-in joint has enough time to accomplish the shut-in, and fluid can't spill over in the well, the protection marine environment.
When the emergency releasing male head is separated from the rigid ring, the well sealing joint completes well sealing, the retention valve is closed, the condition that the fluid in the well reserved in the upper workover riser cannot overflow is guaranteed, and the marine environment is protected;
and continuously recovering the emergency releasing male connector to realize the emergency releasing function.
When the emergency release device with the tie-back function is tied back, the underwater robot is lowered, and the underwater robot is used for taking out the connecting device (namely the residual shearing pin after shearing) remained on the emergency release female head.
The emergency release device with the tieback function can be tieback according to the following steps:
lowering the emergency release male joint, and jacking the retaining valve by the lower workover riser (rigid ring) to communicate the interiors of the upper workover riser and the lower workover riser;
continuing to lower the emergency releasing male head to enable the emergency releasing male head to be matched with the emergency releasing female head and to be fixed;
connecting the upper power line to the power system using the underwater robot (i.e. resetting the valve);
supplementing energy to the power system to an initial value using the underwater robot.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the power transmission equipment for emergency release and well sealing is integrated underwater, and conventional control pipe cables, rollers and other equipment are not needed, so that the requirements on the bearing capacity and deck space of the drilling operation ship are reduced.
2. The invention can be used for both conventional drilling operation ships and engineering ships, has strong adaptability and flexible and convenient operation, and can be widely applied to well workover operation of deep water oil and gas fields adopting an underwater wellhead development mode.
Drawings
Fig. 1 is a schematic view of the emergency release apparatus of the present invention in a connected state.
Fig. 2 is a schematic view of the emergency release apparatus of the present invention in an open state.
Fig. 3 is a schematic view of the emergency release apparatus of the present invention in a reversed configuration.
The respective symbols in the figure are as follows:
the system comprises an emergency release joint 1, a power system 2, a well shut-in joint 3, a well workover riser 4, a wellhead connector 5, an underwater robot 6, an emergency release male joint 101, an emergency release female joint 102, a rigid ring 103, a retaining valve 104, a shearing pin 105, a positioning male joint 106 and a positioning female joint 107.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.
As shown in fig. 1, the emergency release device with a tie-back function according to the present invention includes: the well workover riser 4, emergent release joint 1, driving system 2, shut-in joint 3, well head connector 5.
Wherein, the emergency release joint 1 comprises an emergency release male head 101 and an emergency joint female head 102, the emergency release male head 101 is fixed on an upper workover riser connected with an operation ship, the emergency release female head 102 is fixed on a lower workover riser connected with an underwater wellhead, when the emergency release male head 101 is matched with the emergency release female head 102, the internal communication between the upper workover riser and the lower workover riser is realized, and the emergency release male head 101 and the lower workover riser are sealed by 3 rigid rings 103 arranged along the axial direction of the peripheral wall of the lower workover riser, the rigid rings 103 are externally coated with elastic sealing materials (not shown in the figure) and arranged along the axial interval of the rigid rings 103, when the emergency release male head 101 is matched with the lower workover riser, the elastic sealing materials are deformed under the extrusion of the emergency release male head 101, thereby realizing the sealing between the emergency release male head 101 and the lower workover riser, the rigid ring 103 can play the roles of sealing the well and delaying, and ensures that the well sealing joint has enough time to complete well sealing.
The bottom of emergent public head 101 of freeing is provided with holds and stays valve 104, specifically is the flapper valve, when emergent public head 101 of freeing and emergent female head 103 of freeing cooperate, hold and stay valve 104 and open under the top of lower workover riser's top pushes away the operation, when the operation ship and the underwater wellhead are freed from, when emergent public head 101 of freeing breaks away from with emergent female head 102 of freeing promptly completely, hold and stay valve 104 closed, can guarantee to remain in the unable overflow of the interior fluid of upper portion workover riser, the marine environment is protected.
The emergency release male head 101 and the emergency release female head 102 are positioned by a positioning male head 106 and a positioning female head 107, wherein the positioning male head 106 is arranged on the emergency release male head 101, and the positioning female head 107 is arranged on the emergency release female head 102. The emergency disengaging male head 101 is provided with a fixed upper power line 201, the upper power line 201 being connected to the power system 2. The well shut-in sub 3 is provided with a lower power line 202, the lower power line 202 being connected to the power system 2.
The emergency release male head 101 and the emergency joint female head 102 are fixed together by 4 shearing pins 105 uniformly distributed on the periphery, the shearing pins 105 are designed to have handle-type shapes, and a distance is reserved between the shearing pins 105 and the emergency release female head 102, so that the underwater robot 6 can conveniently grab the emergency release male head and the emergency joint female head.
In the emergency release device of the invention, the power system 2 mainly has the following functions: in the emergency release situation, when the upper power pipeline 201 is disconnected from the power system 2, linkage is realized, and power liquid is provided for the well shut-in joint 3 through the lower power pipeline 202.
In the emergency release device, the well sealing joint 3 has the main functions of: the internal pipe column is cut and the shaft is sealed under the emergency release condition, so that well sealing is realized, and oil gas in the shaft cannot overflow the shaft to pollute the marine environment after the emergency release connector is released.
When the emergency release occurs, as shown in fig. 2, the shearing pin 105 is sheared by lifting the workover riser 4 (an upper pipe section connected with the working ship) upwards, the emergency release male head 101 and the emergency release female head 102 start to be separated, the upper power pipeline 201 is disconnected with the power system 2, power fluid is guided to enter the well plugging joint 3, and the well plugging action is triggered.
The emergency releasing male head 101 continues to move upwards, at the moment, the rigid ring 103 plays roles in sealing the well and delaying, the well sealing joint 3 is guaranteed to have enough time to complete well sealing, fluid in the well cannot overflow, and the marine environment is protected.
When the emergency releasing male head 101 is separated from the rigid ring 103, the well sealing joint 3 is already sealed, the retention valve 104 is closed, the fluid in the well reserved in the upper workover riser 4 cannot overflow, and the marine environment is protected. And continuously recovering the emergency releasing male head 101 to realize the emergency releasing function.
As shown in fig. 3, when a tie-back is required, move the workboat over the emergency disconnect box 102; the underwater robot 6 is lowered, and the underwater robot is used to take out the shear pins remaining on the emergency release female head 102.
And (3) lowering the emergency release male head 101, ejecting the retaining valve 104 by the rigid ring 103, and communicating the interiors of the workover marine riser 4.
The emergency releasing male head 101 is continuously lowered, and the positioning male head 106 and the positioning female head 107 are used for realizing positioning; the shear pin 105 is reinstalled using the underwater robot 6, both to effect the reinstallation.
The upper power line 201 is connected to the power system 2, and the power system 2 is supplied with energy to an initial value by the underwater robot 6.
And continuing the workover treatment.
Claims (10)
1. An emergency release device with a tie-back function comprises an emergency release head, a power system and a well plugging joint;
the emergency release head comprises an emergency release male head and an emergency release female head, the emergency release male head is fixed on an upper workover riser connected with an operation ship, the emergency release female head is fixed on a lower workover riser connected with an underwater wellhead, when the emergency release male head is matched with the emergency release female head, the internal communication between the upper workover riser and the lower workover riser is realized, the emergency release male head and the lower workover riser are arranged in a sealing manner, and when the upper workover riser is lifted, the sealing arrangement plays roles in sealing a well and delaying;
a retaining valve is arranged at the lower port of the emergency release male head, and when the emergency release male head is matched with the emergency release female head, the retaining valve is opened under the pushing action of the lower workover riser; when the emergency release male head is disengaged from the emergency release female head, the retention valve is closed to close the upper workover riser;
the emergency release male connector is connected with the power system through an upper power pipeline;
the well sealing joint is connected with the power system through a lower power pipeline;
under the condition of emergency release, the upper workover riser is lifted upwards to separate the emergency release male head from the emergency release female head, and when the upper power pipeline is disconnected with the power system, power liquid is provided for the well sealing joint through the lower power pipeline to trigger well sealing action.
2. The emergency release device with tie-back function according to claim 1, wherein: the retention valve is a flapper valve.
3. The emergency release device with tieback function according to claim 1 or 2, wherein: the emergency release male head and the lower well workover riser are arranged in a sealing mode as follows:
be fixed in a plurality of rigidity rings on the periphery wall of lower part workover tubular, the outer cladding of rigidity ring has elastic sealing material, works as emergent public head of liberation with during the workover riser cooperation of lower part, elastic sealing material is in emergent public head of liberation's extrusion produces deformation down, thereby realizes emergent public head of liberation with sealed between the workover riser of lower part.
4. Emergency release device with tie-back functionality, according to claim 3, characterized in that
The elastic sealing material is arranged along the circumferential direction or the axial direction of the rigid ring.
5. Emergency release device with tie-back functionality according to any one of claims 1 to 4, characterized in that: the emergency releasing male head and the emergency releasing female head are fixed through a shearing pin.
6. The emergency release device with tie-back function according to claim 5, wherein: the shearing pin is provided with a handle;
and a space is arranged between the shearing pin and the emergency releasing female head.
7. Emergency release device with tie-back functionality according to any one of claims 1 to 6, characterized in that: the emergency releasing male head and the emergency releasing female head are positioned by matching the positioning male head with the positioning female head;
the positioning male head is arranged on the emergency release male head, and the positioning female head is arranged on the emergency release female head.
8. An emergency releasing and sealing method for an underwater wellhead comprises the following steps:
connecting an underwater wellhead and a workover riser by means of the emergency release device with tieback functionality of any one of claims 1 to 7;
when the working condition of emergent release takes place, upwards carry the upper portion workover riser, under the effect of lifting force, emergent release public head with emergent release female head begins to break away from, works as upper portion power pipeline with when the driving system disconnection, through lower part power pipeline does the shut-in well connects provides power liquid, triggers the action of shutting in the well.
9. The subsea wellhead emergency trip well shut-in method according to claim 8, characterized in that: and when the emergency release device with the tie-back function is tied back, the underwater robot is lowered, and the underwater robot is used for taking out the connecting device remained on the emergency release female head.
10. The subsea wellhead emergency trip well shut-in method according to claim 9, characterized in that: the emergency release device with the tieback function is tieback according to the following steps:
lowering the emergency release male joint, and jacking the retaining valve by the lower workover riser to communicate the upper workover riser with the interior of the lower workover riser;
continuing to lower the emergency releasing male head to enable the emergency releasing male head to be matched with the emergency releasing female head and to be fixed;
connecting the upper power line with the power system using the underwater robot;
supplementing energy to the power system to an initial value using the underwater robot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011028683.3A CN112145095B (en) | 2020-09-25 | 2020-09-25 | Emergency release device and method with tie-back function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011028683.3A CN112145095B (en) | 2020-09-25 | 2020-09-25 | Emergency release device and method with tie-back function |
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| CN112145095A true CN112145095A (en) | 2020-12-29 |
| CN112145095B CN112145095B (en) | 2022-05-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682004A (en) * | 2020-12-30 | 2021-04-20 | 纽威石油设备（苏州）有限公司 | Emergency releasing well-sealing equipment for underwater wellhead |
| CN112761565A (en) * | 2020-12-30 | 2021-05-07 | 纽威石油设备（苏州）有限公司 | Release device and emergent well plugging equipment that releases suitable for underwater wellhead |
| CN113309475A (en) * | 2021-07-15 | 2021-08-27 | 中海石油(中国)有限公司 | Anti-riser rebound system suitable for deep water light workover and use method |
| CN115258050A (en) * | 2022-07-15 | 2022-11-01 | 武汉鑫鼎泰技术有限公司 | Tube-shape gravity anchor |
| CN116683388A (en) * | 2023-08-04 | 2023-09-01 | 上海勘测设计研究院有限公司 | Marine wind power pipe cable circulation connected system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112682004A (en) * | 2020-12-30 | 2021-04-20 | 纽威石油设备（苏州）有限公司 | Emergency releasing well-sealing equipment for underwater wellhead |
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| CN115258050A (en) * | 2022-07-15 | 2022-11-01 | 武汉鑫鼎泰技术有限公司 | Tube-shape gravity anchor |
| CN116683388A (en) * | 2023-08-04 | 2023-09-01 | 上海勘测设计研究院有限公司 | Marine wind power pipe cable circulation connected system |
| CN116683388B (en) * | 2023-08-04 | 2023-10-10 | 上海勘测设计研究院有限公司 | Marine wind power pipe cable circulation connected system |
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|---|---|
| CN112145095B (en) | 2022-05-17 |
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