CN204283312U - A kind of downhole blow-out preventer - Google Patents
A kind of downhole blow-out preventer Download PDFInfo
- Publication number
- CN204283312U CN204283312U CN201420779882.1U CN201420779882U CN204283312U CN 204283312 U CN204283312 U CN 204283312U CN 201420779882 U CN201420779882 U CN 201420779882U CN 204283312 U CN204283312 U CN 204283312U
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- CN
- China
- Prior art keywords
- centralizer
- central tube
- top connection
- out preventer
- shear pin
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of downhole blow-out preventer, be arranged on drilling tool, described preventer comprises top connection centralizer and lower contact centralizer, described top connection centralizer is provided with center piston and pressure drop piston, in the pin-and-hole of described top connection centralizer, outer shear pin is installed, described outer shear pin is used for fixing described pressure drop piston, described center piston is provided with interior shear pin, described upper and lower joint centralizer is connected with central tube respectively, and be slidably connected with packing element assembly, described packing element assembly is connected with central tube, and described central tube is provided with inlet opening.Downhole blow-out preventer of the present utility model is that one prevents gas blowout accident from down-hole well control device instrument occurring, and Prevention of blowout accident once, can be saved the loss of 1,000,000 or ten million, more can effectively prevent the pollution of the environment, the generation of personnel casualty accidents.
Description
Technical field
The utility model belongs to oil exploration, development field field, the down-hole control tool that specifically in a kind of oil exploration, development process, effective Prevention of blowout accident occurs.
Background technology
In oil and gas well drilling construction, be drill-through hydraulic oil safely, gas-bearing formation avoid drilling well blowout out of control accident occurs, need, at the well head of drilling well or shaft bottom, a kind of equipment is installed---preventer.When the pressure in pit shaft is less than strata pressure, the oil in down-hole formation, gas, water enter pit shaft and form overflow or well kick, time serious, drilling well blowout and firing accident can occur.The effect of preventer exactly can quick closedown well head and down-hole annular when there is overflow, well kick in well, prevents the generation of gas blowout accident.
Preventer: be divided into downhole blow-out preventer and ground preventer, downhole blow-out preventer is blank at present at home.
Utility model content
In order to solve the existing problem that drilling well blowout and firing accident occur in oil and gas well drilling construction, the utility model provides a kind of downhole blow-out preventer.
The technical solution of the utility model is: a kind of downhole blow-out preventer, be arranged on drilling tool, described preventer comprises top connection centralizer and lower contact centralizer, described top connection centralizer is provided with center piston and pressure drop piston, in the pin-and-hole of described top connection centralizer, outer shear pin is installed, described outer shear pin is used for fixing described pressure drop piston, described center piston is provided with interior shear pin, on described, lower contact centralizer is connected with central tube respectively, and be slidably connected with packing element assembly, described packing element assembly is connected with central tube, described central tube is provided with inlet opening.
Preferably, described top connection centralizer is by screwed connection on lower screw thread and central tube.
Preferably, described lower contact centralizer is connected by the pin thread of box with central tube lower end.
Preferably, the inlet opening place of described central tube is provided with seal rubber sleeve, is provided with unidirectional feeding device between seal rubber sleeve and central tube.
The beneficial effects of the utility model: downhole blow-out preventer of the present utility model is that one prevents gas blowout accident from down-hole well control device instrument occurring, Prevention of blowout accident once, the loss of 1,000,000 or ten million can be saved, more can effectively prevent the pollution of the environment, the generation of personnel casualty accidents.
Accompanying drawing explanation
Fig. 1 is the utility model downhole blow-out preventer structural representation;
Fig. 2 is that in the utility model, preventer is arranged on state diagram drilling tool entering well;
Fig. 3 is that in the utility model, preventer sets state diagram;
Fig. 4 is the pressure reduction bypass passageways open mode schematic diagram of the top connection centralizer of preventer in the utility model;
Fig. 5 is preventer unset state schematic diagram in the utility model;
In figure: 1 top connection centralizer, 2 steel balls, 3 pressure drop pistons, 4 outer shear pins, 5 center piston, shear pin in 6,7 seal rubber sleeves, 8 packing element assemblies, 9 central tubes, 10 lower contact centralizers, 11 pressure reduction bypass passageways, 12 inlet openings, the 13 unidirectional feeding devices in space 14,15 preventers, 16 drilling tools, 17 wells, 18 packing element upper binding heads, 19 packing element lower union joints, 20 packing elements.
Detailed description of the invention
By reference to the accompanying drawings the embodiment that the utility model provides is described in further detail:
As Fig. 1, shown in 2, a kind of downhole blow-out preventer, be arranged on drilling tool 16, described preventer 15 comprises top connection centralizer 1 and lower contact centralizer 10, described top connection centralizer 1 is provided with center piston 5 and pressure drop piston 3, in the pin-and-hole of described top connection centralizer 1, outer shear pin 4 is installed, described outer shear pin 4 is for fixing described pressure drop piston 3, described center piston 5 is provided with interior shear pin 6, on described, lower contact centralizer is connected with central tube 9 respectively, and be slidably connected with packing element assembly 8, described packing element assembly 8 is connected with central tube 9, described central tube 9 is provided with inlet opening 12.
Wherein, preventer 15 is connected in the middle of drilling tool 16, generally be connected between drill collar and drilling rod, serve as drill pipe nipple during normal drilling well to use, described top connection centralizer 1 is by screwed connection on lower screw thread and central tube 9, described lower contact centralizer 10 is connected by the pin thread of box with central tube 9 lower end, inlet opening 12 place of described central tube 9 is provided with seal rubber sleeve 7, be provided with unidirectional feeding device 14 between seal rubber sleeve 7 and central tube 9, packing element assembly 8 comprises packing element upper binding head 18, packing element lower union joint 19 and packing element 20.
The course of work of downhole blow-out preventer: downhole blow-out preventer 15 is connected in the middle of drilling tool 16, is generally connected between drill collar and drilling rod, serves as drill pipe nipple and uses during normal drilling well.When needing closing well when finding overflow or well kick in drilling well, steel ball 2 is dropped in the drilling rod of ground, steel ball 2 to be delivered in downhole blow-out preventer center piston 5 on auspicious ball seat by ground installation borehole pump, continue to pump into drilling fluid, when pressure reaches the settings of interior shear pin 6, interior shear pin 6 is cut off, center piston 5 and steel ball 2 move down and put in place, drilling fluid enters seal rubber sleeve 7 and arrives packing element assembly 8 inner chamber, increase along with entering drilling well liquid measure, packing element assembly 8 is expanded increase, thus make packing element assembly 8 and well rock close contact, downhole blow-out preventer sets completely (as shown in Figure 3), preventer sets namely by the plugged annulus outside drill string and in well 17, such shaft bottom annular pressure is controlled, the drilling fluid density that pressure determines to need kill-job is found by rig floor, when after the drilling fluid being equipped with kill-job, continue to suppress in drilling tool, when pressure drop piston 3 ring area pressure reach outer shear pin 4 shear force is set time, outer shear pin 4 is cut off, pressure drop piston 3 will move right, pressure reduction bypass passageways 11 on downhole blow-out preventer is opened (as shown in Figure 4), the kill-job drilling fluid be equipped with is entered drilling rod by inlet opening 12 by unidirectional feeding device 14, by downhole blow-out preventer kill-job passage, carry out circulation kill-job, after down-hole pressure is effectively controlled, on carry drilling tool rotate forward, space 13 is formed between packing element upper binding head 18 and central tube 9, inner pressure can release through the space 13 shown in Fig. 5, preventer deblocking can be realized by downhole blow-out preventer deblocking (as shown in Figure 5), pull out of hole and change drilling tool.By said process, effectively oil-air pressure is effectively controlled in shaft bottom, prevents the generation of gas blowout accident.
In this description, the utility model is described with reference to its specific embodiment.But, still can make various amendment and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, manual and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (4)
1. a downhole blow-out preventer, be arranged on drilling tool, it is characterized in that, described preventer comprises top connection centralizer and lower contact centralizer, described top connection centralizer is provided with center piston and pressure drop piston, in the pin-and-hole of described top connection centralizer, outer shear pin is installed, described outer shear pin is used for fixing described pressure drop piston, described center piston is provided with interior shear pin, described upper and lower joint centralizer is connected with central tube respectively, and be slidably connected with packing element assembly, described packing element assembly is connected with central tube, and described central tube is provided with inlet opening.
2. downhole blow-out preventer according to claim 1, is characterized in that, described top connection centralizer is by screwed connection on lower screw thread and central tube.
3. downhole blow-out preventer according to claim 1, is characterized in that, described lower contact centralizer is connected by the pin thread of box with central tube lower end.
4. according to the downhole blow-out preventer in claim 1-3 described in any one, it is characterized in that, the inlet opening place of described central tube is provided with seal rubber sleeve, is provided with unidirectional feeding device between seal rubber sleeve and central tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420779882.1U CN204283312U (en) | 2014-12-12 | 2014-12-12 | A kind of downhole blow-out preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420779882.1U CN204283312U (en) | 2014-12-12 | 2014-12-12 | A kind of downhole blow-out preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204283312U true CN204283312U (en) | 2015-04-22 |
Family
ID=52866487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420779882.1U Expired - Fee Related CN204283312U (en) | 2014-12-12 | 2014-12-12 | A kind of downhole blow-out preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204283312U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453774A (en) * | 2014-12-12 | 2015-03-25 | 新疆力信油田工程技术有限公司 | Downhole blowout preventer |
| CN106522883A (en) * | 2016-11-15 | 2017-03-22 | 中国石油化工股份有限公司 | Oil/gas well pipe cleaning and well washing integrated tool |
-
2014
- 2014-12-12 CN CN201420779882.1U patent/CN204283312U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453774A (en) * | 2014-12-12 | 2015-03-25 | 新疆力信油田工程技术有限公司 | Downhole blowout preventer |
| CN106522883A (en) * | 2016-11-15 | 2017-03-22 | 中国石油化工股份有限公司 | Oil/gas well pipe cleaning and well washing integrated tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170725 Address after: 430040, Hubei, Wuhan, East and West Lake, gold and Silver Lake, Ma Chi Road, South Central School Patentee after: DOWNHOLE TESTING COMPANY OF SINOPEC JIANGHAN OILFIELD SERVICE CO.,LTD. Address before: 830000, 38 South Street, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region, Guangzhou Patentee before: XINJIANG LIXIN OILFIELD ENGINEERING Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20211212 |