CN86105631A - Isolate wellhead assembly - Google Patents
Isolate wellhead assembly Download PDFInfo
- Publication number
- CN86105631A CN86105631A CN198686105631A CN86105631A CN86105631A CN 86105631 A CN86105631 A CN 86105631A CN 198686105631 A CN198686105631 A CN 198686105631A CN 86105631 A CN86105631 A CN 86105631A CN 86105631 A CN86105631 A CN 86105631A
- Authority
- CN
- China
- Prior art keywords
- further characterized
- explosive
- detonator
- sleeve
- detonator part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002360 explosive Substances 0.000 claims abstract description 32
- 239000004033 plastic Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 3
- 238000005422 blasting Methods 0.000 abstract description 2
- 230000009172 bursting Effects 0.000 abstract description 2
- 239000000945 filler Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/12—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground specially adapted for underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/02—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground by explosives or by thermal or chemical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geophysics And Detection Of Objects (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Shovels (AREA)
Abstract
Device 1 is to adopt bursting charge 2 (being represented by dotted lines in Fig. 1) to isolate the well head of sub-sea drilled wells system.This device 1 comprises that two detonator parts 3 and 4 are connected to the sleeve pipe or the housing of blasting charge 2.In sleeve pipe 5 the insides explosive 2 is housed, means that the explosive that adopts standard weights can isolate the well head of different-thickness, that just provides the ignition charge of a minimum thickness under maximum explosion effect.
Description
The present invention relates to isolate wellhead assembly, or isolate the device of well system other parts (for example many casing strings) with explosive.
In a single day as everyone knows, in petroleum industry, find callable oil or exhaustion or the dilution of gas reserves in the oil well, must isolate well head.Requirement according to the rules, this mouthful oil well is sealed and is reinforced, and removes all devices more than 10 inches (3.05 meters) below mud line, is not that the mechanical cutting sleeve pipe is placed explosive exactly usually.
Mechanical cutting is a timely and expensive operation, and usually the explosive payload cut off of blast is big, and poor efficiency and unreliable causes people to be reluctant to use them.
Provide the equipment that cuts sleeve pipe reliably according to the object of the invention, the surrounding devices of sleeve pipe is caused less damage, use a small amount of explosive and reduce the problem of subsequent explosion effect, for example by hydraulic blow, damage is close to the oil tank of explosive.
According to the device in well head isolation well system provided by the invention, comprise a sleeve pipe, and explosive is arranged at inner sleeve with inside and outside sleeve.
There is frangible medium in space between sleeve, and frangible medium can comprise foamed plastic or concrete.Each sleeve pipe is made of concentric cylinder, and an annular space is provided thus.
Said apparatus comprises two detonator parts, and they lay respectively at the two ends of sleeve pipe.
This device is included in two ends the detonating charge device takes place basically simultaneously.
Provided take place simultaneously basically priming device be included in one in the detonator part blast igniting primer and be connected to the blast igniting primer of another detonator part from a detonator part, two blast igniting primers are same length basically.
A detonator part has guiding device, and this guiding device passes through from the space between the sleeve, and extends to another detonator part, and two blast igniting primers between the detonator part are accepted and guided to guiding device.
Guiding device comprises two pipes of rigidity basically, extends to another detonator part from a detonator part by the space between the sleeve pipe.
Another detonator part has the protective casing that rigidity pipe two ends are installed.
Each detonator part comprises a plane waveform.
Each detonator part comprises a body with inner and outer shell, and the space between the housing comprises frangible medium.
Frangible medium can comprise for example cement of foamed plastic or adhesives.
The inner sleeve of sleeve pipe and the inner casing of each detonator part are same diameter basically, and the outer sleeve of sleeve pipe and the shell of each detonator part also are same diameter basically.
The cap sensitive rope can be connected to the central point of explosive one end and the central point of the relative end of explosive material.
Primacord comprises four sections, and they are connected to two junction boxes in explosive bottom, and one section cap sensitive rope is connected to an end of explosive from a detonator box, and is connected to the other end of explosive charge from another detonator box, and two segment length equate substantially.
Four sections primacords are separated by 90 ° basically.
Isolate wellhead assembly and describe hereinafter as embodiment, and with reference to accompanying drawing.
Fig. 1 is the decomposition diagram according to apparatus of the present invention.
Corresponding half elevation of top detonator part during Fig. 2 A-C represents to use (in the longitudinal cross-section) and top and bottom perspective views.
Corresponding half elevation of bottom detonator part during Fig. 3 and Fig. 3 A represent to use (in the longitudinal cross-section) and upward view.
Fig. 4 and Fig. 4 A represent to load the explosive sleeve pipe, and be similar with the view of Fig. 3 and Fig. 3 A.
Fig. 5 and Fig. 5 A represent corresponding half elevation of each detonator part lining (in the longitudinal cross-section) and vertical view.
With reference to accompanying drawing, indication device 1 is to dot in the drawings with bursting charge 2(among the figure) isolate the device of sub-sea drilled wells system well head, device 1 comprises two detonator parts 3 and 4, they are connected to the sleeve pipe or the housing 5 of explosive 2.
The device of explosive 2 is housed in sleeve pipe 5, the well head of segregate different-thickness is used the explosive of standard weights, the explosive initiation of supply minimum thickness under maximum explosion effect.This is to contrast with existing technical level, and explosive is around the center packing.In the sort of structure, must use to double the well head that comes 40 centimetres of isolation diameter as the explosive of 20 centimetres of well heads of isolation diameter, therefore the invention provides standardized explosive charging.
Foaming fillers has good transmission impact property in each sleeve, is frangible and densification, so may absorb energy less when detonating.
In use, top detonator part 3 has a web-like blast igniting primer to terminate at explosive 2 places.The blast igniting primer of same length 13 extends to bottom (in use) detonator part 4 along each post 14 as the web-like detonator in the space, and it has contacted fried powder charge 2 there, and the contact point of another detonator is arranged on relative position.
In use, a pair of blast igniting primer detonates basically simultaneously, because their equal in length are just exploded with the phase same rate.So that they simultaneously or almost simultaneously locate ignition charge 2 together at relative two ends, therefore explosive 2 is to detonate at two ends, and lining or plane wave 8 guarantee that two plane waveforms lead to the center of detonator part, they take place and the rectangular explosive force of length that installs 1 simultaneously there, so clarity ground has isolated well head.
The actual connection of blast igniting primer can variation, but the central point of cap sensitive rope at the explosive top begins in a kind of structure, has four sections primacords of 90 ° of being separated by to be connected to two on the bottom circumference is separated by 180 ° terminal box. Two sections primacords are collided and are detonated at once in terminal box. Be contained in the end that the bottom interior equal length primacord of detonator part is fixed on relative detonator part, namely be fixed on an end of top detonator part. Primacord here contacts with primacord from the opposite terminal box, and this terminal box is on the top of plane wave or transmitter, and plane wave or transmitter are positioned at the middle position of detonator part bottom, top.
Claims (15)
1, isolate the wellhead assembly of well system, it is characterized in that: sleeve pipe (5) has an inner sleeve (11) and an outer sleeve (12), and in inner sleeve (11) the inside explosive (2) is housed.
2, device according to claim 1, it is further characterized in that: the used frangible medium in the space between sleeve (11,12) is concrete preferably.
3, according to claim 1,2 described devices, it is further characterized in that: sleeve (11,12) is made up of the letter of concentric circle.
4, according to any one described device among the claim 1-3, it is further characterized in that: two detonator parts (3,4) lay respectively at the two ends of sleeve pipe (5).
5, according to any one described device among the claim 1-4, it is further characterized in that: the device in order to ignition charge (2) detonates basically simultaneously at every end.
6, device according to claim 5, it is further characterized in that: the device that detonates simultaneously basically is provided, be included in blast igniting primer in the detonator part (4) and one and be connected to the blast igniting primer of detonator part (3) from detonator part (4), length is identical basically for two blast igniting primers.
7, device according to claim 6, it is further characterized in that: detonator part (4) has guiding device (14), guiding device is from sleeve (11,12) space between by and extend to another detonator part (3), and by the blast igniting primer between guiding device (14) acceptance and the guiding detonator part (3,4).
8, device according to claim 7, it is further characterized in that: guiding device by two basically the pipe of rigidity form.
9, device according to claim 8, it is further characterized in that: the promising protective casing of accepting guiding device rigidity pipe (14) of detonator part (3).
10, device according to claim 9, it is further characterized in that: the body that each detonator part (3,4) is made up of an inner and outer shell, the space between the inside and outside housing holds frangible medium, preferably foamed plastic or concrete or cement.
11, according to any one described device among the claim 4-10, it is further characterized in that: each detonator part comprises a wavy thing 8 in plane.
12, according to any one described device among the claim 4-11, it is further characterized in that: the inner sleeve (11) of sleeve pipe (5) and the internal diameter of each detonator part are identical substantially, and the outer tube (12) of sleeve pipe (5) is also identical substantially with each detonator part (4) external diameter.
13, according to any one described device among the claim 6-12, it is further characterized in that: the cap sensitive rope is connected to the central point of explosive (2) one ends, and links the central point of a relative end of explosive (2).
14, device according to claim 13, it is further characterized in that: primacord has four sections, be connected to two junction boxes in explosive 2 bottoms, be connected to an end of explosive (2) from a junction box by one section cap sensitive rope, and being connected to the other end of explosive (2) from another junction box, this two segment length is equal substantially.
15, device according to claim 14, it is further characterized in that: four sections primacords are 90 ° and separate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB858519111A GB8519111D0 (en) | 1985-07-29 | 1985-07-29 | Severing wellhead |
| GB8519111 | 1985-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86105631A true CN86105631A (en) | 1987-02-04 |
Family
ID=10583029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198686105631A Pending CN86105631A (en) | 1985-07-29 | 1986-07-23 | Isolate wellhead assembly |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0211515A2 (en) |
| CN (1) | CN86105631A (en) |
| DK (1) | DK329086A (en) |
| GB (2) | GB8519111D0 (en) |
| NO (1) | NO863042L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018149070A1 (en) * | 2017-02-15 | 2018-08-23 | 中国石油大学(北京) | Energy-concentrating and nest-shaped structure-forming bundle device for preventing lost circulation and reinforcing bore wall, and application thereof in prevention of lost circulation in karst cavity |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8516542D0 (en) * | 1985-06-29 | 1985-07-31 | Deepwater Oil Services Ltd | Cutting device |
| US10145195B2 (en) | 2014-05-12 | 2018-12-04 | Halliburton Energy Services, Inc. | Well-component severing tool with a radially-nonuniform explosive cartridge |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB707380A (en) * | 1949-11-21 | 1954-04-14 | Arwyn Randall Davies | Improvements in or relating to cartridges for explosive charges |
| GB1367011A (en) * | 1971-11-25 | 1974-09-18 | Ridgeway J J | Linear shaped-charge device |
| US4037536A (en) * | 1975-09-08 | 1977-07-26 | Imc Chemical Group, Inc. | Enclosure for explosive material |
| US4184430A (en) * | 1977-06-29 | 1980-01-22 | Jet Research Center, Inc. | Method and apparatus for severing tubing |
| US4290486A (en) * | 1979-06-25 | 1981-09-22 | Jet Research Center, Inc. | Methods and apparatus for severing conduits |
| US4378844A (en) * | 1979-06-29 | 1983-04-05 | Nl Industries, Inc. | Explosive cutting system |
| EP0057308B1 (en) * | 1981-01-29 | 1985-05-02 | Wang, Shu-Jen | Apparatus and method of blasting undersea rocks |
| GB2134630B (en) * | 1983-01-10 | 1986-10-15 | Wang Su Jen | Apparatus and method of blasting rocks |
| GB8410631D0 (en) * | 1984-04-26 | 1984-05-31 | Hotforge Ltd | Explosive cutting device |
-
1985
- 1985-07-29 GB GB858519111A patent/GB8519111D0/en active Pending
-
1986
- 1986-06-30 EP EP86305064A patent/EP0211515A2/en not_active Withdrawn
- 1986-06-30 GB GB08615903A patent/GB2178831A/en not_active Withdrawn
- 1986-07-10 DK DK329086A patent/DK329086A/en not_active Application Discontinuation
- 1986-07-23 CN CN198686105631A patent/CN86105631A/en active Pending
- 1986-07-28 NO NO863042A patent/NO863042L/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018149070A1 (en) * | 2017-02-15 | 2018-08-23 | 中国石油大学(北京) | Energy-concentrating and nest-shaped structure-forming bundle device for preventing lost circulation and reinforcing bore wall, and application thereof in prevention of lost circulation in karst cavity |
| US10822913B2 (en) | 2017-02-15 | 2020-11-03 | China University Of Petroleum-Beijing | Energy-gathered bundle type nesting plugging and wall reinforcing device and application thereof in karst cave plugging |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2178831A (en) | 1987-02-18 |
| GB8615903D0 (en) | 1986-08-06 |
| NO863042L (en) | 1987-01-30 |
| DK329086D0 (en) | 1986-07-10 |
| GB8519111D0 (en) | 1985-09-04 |
| EP0211515A2 (en) | 1987-02-25 |
| DK329086A (en) | 1987-01-30 |
| NO863042D0 (en) | 1986-07-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |