CN207609412U - One kind being used for underwater well head explosion fracturing working string - Google Patents

One kind being used for underwater well head explosion fracturing working string Download PDF

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Publication number
CN207609412U
CN207609412U CN201720870156.4U CN201720870156U CN207609412U CN 207609412 U CN207609412 U CN 207609412U CN 201720870156 U CN201720870156 U CN 201720870156U CN 207609412 U CN207609412 U CN 207609412U
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CN
China
Prior art keywords
well head
underwater well
damper
tube body
explosion fracturing
Prior art date
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Application number
CN201720870156.4U
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Chinese (zh)
Inventor
孙林
黄波
杨万里
邹信波
林海春
杨继明
唐贤弟
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China National Offshore Oil Corp CNOOC
CNOOC Energy Technology and Services Ltd
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China National Offshore Oil Corp CNOOC
CNOOC Energy Technology and Services Ltd
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Application filed by China National Offshore Oil Corp CNOOC, CNOOC Energy Technology and Services Ltd filed Critical China National Offshore Oil Corp CNOOC
Priority to CN201720870156.4U priority Critical patent/CN207609412U/en
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Publication of CN207609412U publication Critical patent/CN207609412U/en
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Abstract

The utility model provides a kind of for underwater well head explosion fracturing working string, it is made of tube body, the tube body is disposed with damper, pressure drilling initiator, time-delay mechanism, bear gun and gun breech from top to bottom, and the tube body is hung on by underwater well head hanger on the tubing head of underwater well head;At least two dampers are set on the tube body, it is disposed with packer and Telescopic short piece between the damper and the underwater well head hanger, the tubing string can solve to avoid oil leaking pollution seawater from causing environmentally friendly accident in the underwater well head explosion fracturing operation process of oil field, ensure tubing string and underwater well head secure connection, tubing string is effectively prevent to buckle technical problem.

Description

One kind being used for underwater well head explosion fracturing working string
Technical field
The utility model belongs to oil gas body machinery field, more particularly to is used for a kind of underwater well head explosion fracturing working pipe Column.
Background technology
Explosion fracturing is carry out pressure break to stratum using gunpowder or propellant combustion generation high temperature and high pressure gas one Technological means, also known as high enegry gas fracturing.This technology since operation is simple, low-cost, effect protrudes, particularly suitable for The fracturing yield increasing of bottom water oil cap oil reservoir.At present explosion fracturing technology at sea oil field obtain remarkable result, be and hydraulic fracturing it Afterwards, the inexpensive gas fracturing technique that offshore oilfield is given priority to.
Offshore oilfield has currently formed the explosion fracturing tubing string or device of series of knowledge property right, but is suitable for conventional marine Platform explosion fracturing operation, with the exploration and development of China's ocean deepwater resource, for there is explosion fracturing to increase production the deep water of demand This particular form of oil field underwater well head, presently, there are risk, such as semisubmersible platform is teetertottered to drilling rod card due to the water surface Watt impact risk, effectively cause junk bit freezing;And well head can then be impacted using underwater hanger;The omnipotent blowout prevention that original uses Device fixing seal, there are the hidden danger of underwater water proof tracheal rupture, effectively cause the environmentally friendly accident such as ocean oil leak;If using packer Fixing seal can solve well head shock problem, and prevent well head splash, but it is possible that deblocking is difficult.Therefore current state Inside lack offshore oilfield underwater well head explosion fracturing working string, limitation is played to technology field scale application at sea.
In conclusion lacking offshore oilfield underwater well head explosion fracturing working string at present.
Invention content
For technical problem of the existing technology, the present invention provides a kind of for underwater well head explosion fracturing working pipe Column, the tubing string can solve to avoid oil leaking pollution seawater from causing environmentally friendly accident in the underwater well head explosion fracturing operation process of oil field, Ensure tubing string and underwater well head secure connection, tubing string is effectively prevent to buckle technical problem.
In order to solve to exist in the prior art technical problem, the present invention adopts the following technical scheme that:
A kind of tubing string for underwater well head explosion fracturing operation is made of, the tube body is set successively from top to bottom tube body It is equipped with damper, pressure drilling initiator, time-delay mechanism, bear gun and gun breech, the tube body is outstanding by underwater well head hanger It is hung on the tubing head of underwater well head;At least two dampers, the damper and the underwater well head are set on the tube body Packer and Telescopic short piece are disposed between hanger.
The first damper and the second damper are provided between the pressure drilling initiator and the Telescopic short piece, it is described First damper bottom is connect with the pressure drilling initiator, and second damper exists with the first damper distance Between 25m~35m.
The packer is 150m or more apart from the hanger.
The Telescopic short piece telescopic extensions are between 0.5m~2.0m.
It is additionally provided with damper group on second damper.
Advantageous effect
1, to effective supplement of current explosion fracturing tubing string:Tubing string is made suitable for offshore oilfield underwater well head explosion fracturing Industry.
2, using safer hang:The suspension of normal platform slips is changed to underwater hanger suspension, is avoided Semisubmersible platform due to when the water surface teetertotters to the impact risk of drill pipe slip.
3, ensure underwater well head safety:Using a RTTS packer, packer carries hydraulic anchor, and fixed tubing string prevents Explosion fracturing operation impact causes well mouth hanger to tubing head equivalent damage.
4, ocean oil leak environmental protection accident is avoided:Using a RTTS packer, seal shaft prevents the greasy dirt of well head from spraying It splashes, while avoiding the hidden danger for the underwater water proof tracheal rupture that the sealing of conventional universal blowout preventer is likely to occur.
5, downhole tool failure is prevented:Using one or more dampers, oil pipe impact failure is avoided;It is flexible using one Pipe nipple, can be with axial stretching, the problems such as preventing oil pipe from driving RTTS packers, impact hydraulic anchor, cause removing seal for packer difficult.
Description of the drawings
Fig. 1 is a kind of underwater well head explosive fracturing working string structural schematic diagram of the utility model.
Reference sign:
1-tube body;2-semisubmersible platforms;3-underwater well heads;4-underwater well head hangers;5- tubing heads;6—RTTS Packer;7-Telescopic short pieces;8-dampers;9-pressure drilling initiators;10-time-delay mechanisms;11-bear gun;12-rifles Tail
Specific implementation mode
The present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, offshore oilfield underwater well head explosion fracturing working string provided by the utility model, by 1 structure of tube body At the tube body is disposed with damper 8, pressure drilling initiator 9, time-delay mechanism 10, bear gun 11 and rifle from top to bottom Tail 12, the tube body 1 are hung on by underwater well head hanger 4 on the tubing head 5 of underwater well head 3;Be arranged on the tube body to Few two dampers (81,82), be disposed between the damper (81,82) and the hanger 4 RTTS packers 6 and Telescopic short piece 7.The first damper 81 and the second damping are provided between the pressure drilling initiator 9 and the Telescopic short piece 7 Device 82,81 bottom of the first damper are connect with the pressure drilling initiator 9, second damper 82 and described first 81 distance of damper is between 25m~35m.The RTTS packers 6 are 150m or more apart from the underwater well head hanger 4. 7 telescopic extensions of Telescopic short piece are between 0.5m~2.0m.It is additionally provided with damper group 83 on second damper 82. The damper group 83 is made of multiple dampers, and each damper can be connected closely or according to equidistant arrangement and tube body phase Even.The utility model can be teetertottered pair to avoid semisubmersible platform due to the water surface by underwater well head hanger tool assembly The impact risk of drill pipe slip;By RTTS packer assemblies, protection underwater well head safety, and prevent pit shaft splash and marine riser Rupture;By damper, Telescopic short piece tool assembly, avoid operation moment impact that from may causing tubing string impact failure and RTTS The problems such as removing seal for packer difficulty.Offshore oilfield underwater well head explosion fracturing operation may be implemented in the utility model, and ensures water Lower well head safe, the problems such as avoiding the environmentally friendly accident such as ocean oil leak and prevent downhole tool failure.
In practice, the tube body 1 of the utility model is made of multiple-tubing string;One underwater well head hanger, 4, RTTS envelopes Every 6, Telescopic short pieces 7 of device, 8, one, two or more dampers time-delay mechanism 10, one of pressure drilling initiator 9, one Or the oil pipe 1 described in multiple 11, gun breeches 12 of bear gun is used for the basic connection of whole tubing string, explosion fracturing tubing string by up to Under the basic order of connection be oil pipe 1, pressure drilling initiator 9, time-delay mechanism 10, bear gun 11, gun breech 12, the damping Device 8 is located on pressure drilling initiator 9, and the Telescopic short piece 7 is located at damper 8 between RTTS packers 6, the water Lower well mouth hanger 4 is located at 6 or more RTTS packers.The underwater well head hanger 4 hangs on the tubing head of underwater well head 3 On 5, while oil pipe 1 cannot seat slips on semisubmersible platform 2.The RTTS packers 6 are needed apart from underwater well head hanger 4 150m or more.The Telescopic short piece 7 is the axial stretching tool for compensating oil pipe, and distance of stretch out and draw back is no more than 2m.Described subtracts It is longitudinal damper to shake device 8, and first is connected with pressure drilling initiator 9 and oil pipe 1, and second is located at pressure drilling initiator On 9 at 30m, both ends are connected with oil pipe 1, remaining can connect with second or individually be connect with oil pipe 1.
The above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art Under the inspiration of the present invention, it in the case where not departing from present inventive concept and claimed range, can also make very Shape changeable, these belong to the row of the protection of the present invention.

Claims (5)

1. one kind being used for underwater well head explosion fracturing working string, it is made of tube body, the tube body is disposed with from top to bottom Damper, pressure drilling initiator, time-delay mechanism, bear gun and gun breech, it is characterised in that:The tube body is outstanding by underwater well head Hanging device is hung on the tubing head of underwater well head;At least two dampers, the damper and the water are set on the tube body It is disposed with packer and Telescopic short piece between lower well mouth hanger.
2. being used for underwater well head explosion fracturing working string as described in claim 1, it is characterised in that:The pressure drilling rises The first damper and the second damper, first damper bottom and the pressure are provided between quick-fried device and the Telescopic short piece Power trepanning initiator connects, and second damper and the first damper distance are between 25m~35m.
3. being used for underwater well head explosion fracturing working string as described in claim 1, it is characterised in that:The packer distance The hanger is 150m or more.
4. being used for underwater well head explosion fracturing working string as described in claim 1, it is characterised in that:The Telescopic short piece Telescopic extensions are between 0.5m~2.0m.
5. being used for underwater well head explosion fracturing working string as claimed in claim 2, it is characterised in that:Second damper On be additionally provided with damper group.
CN201720870156.4U 2017-07-18 2017-07-18 One kind being used for underwater well head explosion fracturing working string Active CN207609412U (en)

Priority Applications (1)

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CN201720870156.4U CN207609412U (en) 2017-07-18 2017-07-18 One kind being used for underwater well head explosion fracturing working string

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720870156.4U CN207609412U (en) 2017-07-18 2017-07-18 One kind being used for underwater well head explosion fracturing working string

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109025941A (en) * 2018-08-09 2018-12-18 中国海洋石油集团有限公司 Explosion fracturing and hydraulic blow pressure break axle-linked cable-car and connection make method
CN109779596A (en) * 2019-02-18 2019-05-21 中海油能源发展股份有限公司 A kind of offshore oilfield Hydraulic Surge Fracturing implementation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109025941A (en) * 2018-08-09 2018-12-18 中国海洋石油集团有限公司 Explosion fracturing and hydraulic blow pressure break axle-linked cable-car and connection make method
CN109025941B (en) * 2018-08-09 2020-09-01 中国海洋石油集团有限公司 Deflagration fracturing and hydraulic impact fracturing combined pipe column and combined method
CN109779596A (en) * 2019-02-18 2019-05-21 中海油能源发展股份有限公司 A kind of offshore oilfield Hydraulic Surge Fracturing implementation method

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Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Sun Lin

Inventor after: Huang Bo

Inventor after: Yang Wanyou

Inventor after: Zou Xinbo

Inventor after: Lin Haichun

Inventor after: Yang Jiming

Inventor after: Tang Xiandi

Inventor before: Sun Lin

Inventor before: Huang Bo

Inventor before: Yang Wanli

Inventor before: Zou Xinbo

Inventor before: Lin Haichun

Inventor before: Yang Jiming

Inventor before: Tang Xiandi

CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 100010 Chaoyangmen street, Dongcheng District, Dongcheng District, Beijing

Co-patentee after: CNOOC Energy Development Co., Ltd.

Patentee after: China Offshore Oil Group Co., Ltd.

Address before: 100010 Chaoyangmen street, Dongcheng District, Dongcheng District, Beijing

Co-patentee before: CNOOC Energy Development Co., Ltd.

Patentee before: China National Offshore Oil Corporation