CN203321418U - Near-bit downhole blowout preventer - Google Patents
Near-bit downhole blowout preventer Download PDFInfo
- Publication number
- CN203321418U CN203321418U CN2013203786040U CN201320378604U CN203321418U CN 203321418 U CN203321418 U CN 203321418U CN 2013203786040 U CN2013203786040 U CN 2013203786040U CN 201320378604 U CN201320378604 U CN 201320378604U CN 203321418 U CN203321418 U CN 203321418U
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- electromagnetic valve
- valve
- pressure
- setting
- flap valve
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Abstract
The utility model discloses a near-bit blowout preventer belonging to the field of downhole blowout preventers. The near-bit downhole blowout preventer comprises a by-pass pressure release valve assembly, a singlechip, an electromagnetic valve, a base sealing glue barrel, a pressure sensor, an arrow-shaped check valve, and the like. The near-bit downhole blowout preventer is characterized in that the electromagnetic valve is arranged at the lower part of the singlechip; the pressure sensor is arranged on the upper end of the arrow-shaped check valve; the base sealing glue barrel is arranged in a long-ring-shaped body groove positioned in the lower part of the electromagnetic valve. According to the near-bit blowout preventer, when the arrow-shaped check valve is switched off, the pressure sensor transmits a signal to the singlechip and controls the electromagnetic valve to open the base sealing glue barrel to safely carry out base sealing in time, so that the blowout is prevented.
Description
Technical field
The utility model relates to a kind of while for the oil gas drilling process, because of down-hole, well kick or blowout occurring, and carries out the downhole blow-out preventer of packing in time in down-hole.
Background technology
Current preventer mainly is installed on well head, while in down-hole, violent well kick phenomenon occurring, relies on operating personnel's experience and sense of responsibility, opens in time the trade control system and completes preventer pass well operations, prevents that gas blowout accident from occurring.If careless carelessness, may cause major accident.
In the actual well drilled process, generation for fear of blowout, well kick process, the guideline of early finding, early processing is taked in well control work, and during in the face of complicated subsurface picture, often occur down-hole that well kick, blowout have occurred and significantly lagging behind appears in wellhead blowout preventor group work on several kms, increased the risk of well control work, for example Gulf of Mexico BP company " 420 " offshore drilling platform Blowout firing explosion accident.In addition, ground preventer is can not solve borehole wall side leakage and the gas blowout accident that causes, as Chongqing Kaixian " 1223 " gas blowout accident has caused huge property loss and serious environmental disruption.Large pressure reduction blowout prevention risk is higher, and the packing pressure reduction that ground arranges preventer is large more than shaft bottom.Therefore, the drilling well downhole blow-out preventer is the blocking high-pressure layer more early, is an important research direction.
Summary of the invention
The purpose of this utility model is: providing a kind of can shunt in a well automatically in down-hole, and timely deblocking as required, guarantees to realize drilling safety, quantity-produced downhole blow-out preventer reliably.
The technical scheme that the utility model solves above-mentioned technical barrier employing is: a kind of nearly drill bit downhole blow-out preventer comprises that the long annular groove of bypass relief valve assembly, single-chip microcomputer, electromagnetic valve, setting packing element, setting pressure cavity, flap valve baffle ring seat, pressure sensor, pressure-transmission tube, arrow type flap valve and body forms.Bypass relief valve assembly is positioned at the body upper end; Single-chip microcomputer is arranged in the body of middle part; Electromagnetic valve is arranged on the single-chip microcomputer bottom; Setting packing element is arranged in the long cannelure of body of electromagnetic valve bottom; Arrow type flap valve is arranged on body hollow cylinder middle part.
Press such scheme, pressure sensor is arranged between flap valve baffle ring seat and pressure-transmission tube, and pressure-transmission tube (8) lower end is arrow type flap valve.Press such scheme, the long annular groove of setting packing element two ends and body is sealed at both ends fixing, between setting packing element inwall and the long annular groove of body, is setting pressure cavity.
Press such scheme, electromagnetic valve is communicated with setting pressure cavity; Electromagnetic valve is communicated with the body cavity of arrow type flap valve bottom; Hole link is passed through in electromagnetic valve and body outside.Electromagnetic valve enters or gets rid of setting pressure cavity for controlling fluid.
The utility model compared with prior art, has following beneficial effect:
(1) install near nearly drill bit, when well kick occurs, the timely and effective automatic plugging of energy, prevent blowout.
(2) control when pressure, at the needs deblocking be, deblocking, can repeatedly be used automatically, needn't make a trip, and saves drilling cost.
(3) simple in structure, reliable operation.
The accompanying drawing explanation
Fig. 1 is nearly drill bit preventer structural representation.
In figure: 1. bypass relief valve assembly, 2. single-chip microcomputer, 3. electromagnetic valve, 4. setting packing element, 5. setting pressure cavity, 6. flap valve baffle ring seat, 7. pressure sensor, 8. pressure-transmission tube, 9. the arrow type returns valve, 10. the long annular groove of body.
The specific embodiment
The utility model is described in further detail for following structure drawings and Examples.
A kind of nearly drill bit downhole blow-out preventer, comprise that bypass relief valve assembly (1), single-chip microcomputer (2), electromagnetic valve (3), setting packing element (4), setting pressure cavity (5), flap valve baffle ring seat (6), pressure sensor (7), pressure-transmission tube (8), arrow type flap valve (9) and the long annular groove of body (10) form.Bypass relief valve assembly (1) is positioned at the body upper end; Single-chip microcomputer (2) is arranged in the body of middle part; Electromagnetic valve (3) is arranged on single-chip microcomputer (2) bottom; Setting packing element (4) is arranged in the long cannelure of body of electromagnetic valve (3) bottom; Arrow type flap valve (9) is arranged on body hollow cylinder middle part.
Pressure sensor (7) is arranged between flap valve baffle ring seat (6) and pressure-transmission tube (8), and pressure-transmission tube (8) lower end is arrow type flap valve (9).Setting packing element (4) two ends and the long annular groove of body (10) are sealed at both ends fixing, between setting packing element (4) inwall and the long annular groove of body (10), are setting pressure cavity (5).The setting pressure cavity of electromagnetic valve (3) (5) is communicated with; Electromagnetic valve (3) is communicated with the body cavity of arrow type flap valve (9) bottom; Electromagnetic valve (3) passes through hole link with the body outside.When abnormal conditions occurring, arrow type flap valve (9) cuts out.The drilling tool internal pressure reaches certain value, the pressure sensor (7) be arranged in downhole blow-out preventer passes to single-chip microcomputer (2) by signal, and control electromagnetic valve (3) and open, make drilling tool inner high voltage drilling fluid enter setting packing element (4) from hydraulic tube, realize the packing high pressure zone.Set up circulation time, from surface pump people weighted mud, the by-pass valve assembly of flowing through (1) enters annular space; When kill job completes, while needing deblocking, single-chip microcomputer (2) is controlled electromagnetic valve (3) and is opened, and setting pressure cavity (5) inner high voltage liquid enters annular space, thereby realizes deblocking.
Claims (4)
1. a nearly drill bit downhole blow-out preventer, comprise that bypass relief valve assembly (1), single-chip microcomputer (2), electromagnetic valve (3), setting packing element (4), setting pressure cavity (5), flap valve baffle ring seat (6), pressure sensor (7), pressure-transmission tube (8), arrow type flap valve (9) and the long annular groove of body (10) form; It is characterized in that: bypass relief valve assembly (1) is positioned at the body upper end; Single-chip microcomputer (2) is arranged in the body of middle part; Electromagnetic valve (3) is arranged on single-chip microcomputer (2) bottom; Setting packing element (4) is arranged on the long cannelure of body interior (10) of electromagnetic valve (3) bottom; Pressure sensor (7) is arranged on arrow type flap valve (9) upper end; Arrow type flap valve (9) is arranged on body hollow cylinder middle part.
2. nearly drill bit downhole blow-out preventer according to claim 1, it is characterized in that: pressure sensor (7) is arranged between flap valve baffle ring seat (6) and pressure-transmission tube (8), and pressure-transmission tube (8) lower end is arrow type flap valve (9).
3. nearly drill bit downhole blow-out preventer according to claim 1, it is characterized in that: setting packing element (4) two ends and the long annular groove of body (10) are sealed at both ends fixing, between setting packing element (4) inwall and the long annular groove of body (10), are setting pressure cavity (5).
4. nearly drill bit downhole blow-out preventer according to claim 1, is characterized in that: the setting pressure cavity of electromagnetic valve (3) (5) connection; Electromagnetic valve (3) is communicated with the body cavity of arrow type flap valve (9) bottom; Electromagnetic valve (3) passes through hole link with the body outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203786040U CN203321418U (en) | 2013-06-28 | 2013-06-28 | Near-bit downhole blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203786040U CN203321418U (en) | 2013-06-28 | 2013-06-28 | Near-bit downhole blowout preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203321418U true CN203321418U (en) | 2013-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203786040U Expired - Fee Related CN203321418U (en) | 2013-06-28 | 2013-06-28 | Near-bit downhole blowout preventer |
Country Status (1)
| Country | Link |
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| CN (1) | CN203321418U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863502A (en) * | 2015-04-22 | 2015-08-26 | 常州工学院 | Safe drilling device and method for preventing overflow and blowout in gas-bearing soil layers |
| CN109751008A (en) * | 2017-11-01 | 2019-05-14 | 中国石油化工股份有限公司 | pipe string |
-
2013
- 2013-06-28 CN CN2013203786040U patent/CN203321418U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863502A (en) * | 2015-04-22 | 2015-08-26 | 常州工学院 | Safe drilling device and method for preventing overflow and blowout in gas-bearing soil layers |
| CN104863502B (en) * | 2015-04-22 | 2017-03-29 | 常州工学院 | A kind of gassiness soil layer anti-overflow and the safe drill devices and methods therefor of blowout |
| CN109751008A (en) * | 2017-11-01 | 2019-05-14 | 中国石油化工股份有限公司 | pipe string |
| CN109751008B (en) * | 2017-11-01 | 2021-01-05 | 中国石油化工股份有限公司 | Pipe string |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20150628 |
|
| EXPY | Termination of patent right or utility model |