CN204060607U - A kind of automatically controlled compression downhole blow-out preventer - Google Patents
A kind of automatically controlled compression downhole blow-out preventer Download PDFInfo
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- CN204060607U CN204060607U CN201420583047.0U CN201420583047U CN204060607U CN 204060607 U CN204060607 U CN 204060607U CN 201420583047 U CN201420583047 U CN 201420583047U CN 204060607 U CN204060607 U CN 204060607U
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Abstract
The utility model relates to a kind of automatically controlled compression downhole blow-out preventer; Belong to oil-well drilling equipment field.This preventer comprises upper center tube, lower center tube, toroidal torque motor, top connection, lower contact and slips.Upper center tube is provided with mud overcurrent axle, toroidal torque motor is equipped with by motor set casing in mud overcurrent axle one end, described toroidal torque motor is made up of rotary output axis, motor stator and rotor, rotary output axis is sleeved on upper center tube, and rotary output axis is connected with mud overcurrent male thread.This preventer structure is simple, easy to maintenance, the packing of inside and outside annular space is realized by toroidal torque motor, improve the automatization level of downhole blow-out preventer, do not need to realize setting and deblocking by lift power on working rig or rotation tubing string, it also avoid and realize top tubing string press down packing element by cutting off pin, can repeatedly use, decrease the maintenance of downhole blow-out preventer and change number of times.
Description
Technical field
The utility model relates to a kind of automatically controlled compression downhole blow-out preventer; Belong to oil-well drilling equipment field.
Background technology
In petroleum natural gas exploration, when the pressure of drilling well fluid column can not balance each other with the pressure of formation fluid, just there will be overflow and well kick, if now do not controlled, will gas blowout accident be caused, cause huge casualties and economic loss.When find well kick, blowout sign time, rapidly and efficiently carry out closing well and kill job is the important guarantee effectively reducing blowout out of control accident.
Usually the blowout prevention technology adopted in current oil drilling and equipment are wellhead blowout preventor groups, and this blowout prevention technology can make formation fluid enter too much in pit shaft drilling fluid, and after wellhead shut-in, casing pressure is very high, causes too high risk to well control operation.Adopt downhole blow-out preventer can realize in down-hole early finding early closing well, well control risk can be reduced, be more conducive to well control operation.But downhole blow-out preventer technology and equipment comparatively unripe both at home and abroad at present, that the electronic control system be equipped with mutually due to it constrains its development on the one hand, mostly it is to transfer drill string by doing industry machine pull-up on the other hand, or the mode of pitching realizes blowout prevention and the deblocking of downhole blow-out preventer, this mode often needs time long reaction, can not realize quick blowout prevention.
The feature that have developed this downhole blow-out preventer of downhole blow-out preventer in a kind of drill string by American scientist in 1974 is: downhole blow-out preventer is provided with the pressure chamber communicated with drilling tool, is provided with the one way valve not allowing liquid reverse flow in pressure chamber.This preventer belongs to packing in drill string, the outer annular space not packing of drill string.
Nineteen eighty-three, American scientist Jobn M. Bednar have developed a kind of push-pull valve downhole blow-out preventer, and its main feature is: drilling rod sound wave transfer control signal, electric screw mechanism are empty and be designed with to lose efficacy and solve alternative scheme as power source, plate packing drill string, inflatable packer packing spacer ring.Shortcoming is: can not bear high pressure without circulation canal, push-pull valve on packing position.
Thereafter 1986, Norway scientist develops a kind of plug valve downhole blow-out preventer, and main feature is: by mud-pulse transfer control signal, use the open and close of electromagnetic valve control flow check road, drilling fluid as power source, plug valve packing drill string, inflatable packer packing spacer ring sky.Shortcoming is that solution plug valve of being honored as a queen can not be opened, and can not set up normal circulation.
In recent years, Domestic Scientific Research mechanism also conducts in-depth research downhole drill preventer technology, and have developed product, but prove through field trial, mostly its technical scheme is to realize setting and deblocking by lift power on working rig or rotation tubing string, and hydraulic setting mode easily causes the radial deformation of joint component, shorten the application life of preventer.Use shear pin to realize packing element compression, after using once, namely preventer lost efficacy.
Summary of the invention
The purpose of this utility model is: provide a kind of output torque of motor that utilizes to realize automatic blowout-prevention and to unlock in time, and can realize the automatically controlled automatically controlled compression downhole blow-out preventer of downhole blow-out preventer.
The technical solution of the utility model is:
A kind of automatically controlled compression downhole blow-out preventer, comprise upper center tube, lower center tube, toroidal torque motor, top connection, lower contact and slips, it is characterized in that: upper center tube is provided with mud overcurrent axle, toroidal torque motor is equipped with by motor set casing in mud overcurrent axle one end, described toroidal torque motor is by rotary output axis, motor stator and rotor are formed, rotary output axis is sleeved on upper center tube, rotary output axis is connected with mud overcurrent male thread, motor stator is arranged on rotary output axis, between motor stator and rotary output axis, rotor is housed, rotor and rotary output axis are connected with a joggle, one end of upper center tube is provided with top connection by motor set casing screw thread, and top connection is provided with one way valve, and the other end of upper center tube is provided with lower center tube, and lower center tube is threaded with upper center tube, mud overcurrent axle is provided with sliding sleeve by splined sleeve, and the mud overcurrent axle of sliding sleeve side is equipped with spline slider, and spline slider is threaded with sliding sleeve, mud overcurrent axle is threaded with spline slider by the external screw thread on its surface, be provided with branch sleeve between splined sleeve and motor set casing, branch sleeve is threaded with motor set casing and splined sleeve respectively, the lower center tube of sliding sleeve side is provided with packing element A, packing element B and packing element C by spacer ring A and spacer ring B interval shape, and the lower center tube of packing element C side is provided with centrum by centrum seat, and the ends screw of lower center tube is provided with lower contact, the lower center tube of lower contact side is provided with slip spider by stage clip, slip spider is equipped with slips, centrum is connected with slips wedging.
Be provided with plugging plate in described upper center tube one end centre bore, on the tube wall of plugging plate both sides, symmetry shape is provided with mud and crosses chute A and mud crosses chute B.
Described mud overcurrent axle is provided with the mud corresponding with crossing chute B with crossing chute A and crosses circulation groove.
The inner side of described splined sleeve is provided with restricted driving groove.
The utility model has the advantage of:
This automatically controlled compression downhole blow-out preventer utilizes the toroidal torque motor be set on central tube realize the automatic blowout-prevention of downhole blow-out preventer and unlock in time.When drilling well is normally carried out, toroidal torque motor does not work, and drilling rod realizes normal drilling well work; When finding the situation of overflow or well kick, start toroidal torque motor, driven by motor mud overcurrent axle is utilized to rotate the sealing realizing interior annular space on the one hand, on the other hand rotary motion is become rectilinear motion by helical structure, sliding sleeve is utilized to promote glue tube base, compression packing element, realizes the sealing of outer annular space, and sets up new circulation on packing top; After reaching new pressure balance, utilize the reversion of motor to realize deblocking, and recover normal circulation, continue drilling well.There is structure simple, feature easy to maintenance, improves the automatization level of downhole blow-out preventer, does not need to realize setting and deblocking by lift power on working rig or rotation tubing string, it also avoid and realize top tubing string press down packing element by cutting off pin, the utilization rate of downhole blow-out preventer can be improved; Realized the packing of outer annular space by compression packing element, the application life of packing element can be improved.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the perspective view of mud overcurrent axle of the present utility model;
Fig. 3 is the perspective view of splined sleeve of the present utility model;
Fig. 4 is the perspective view of upper center tube of the present utility model;
Fig. 5 is the sectional structure schematic diagram of upper center tube of the present utility model.
In figure: 1, top connection, 2, motor set casing, 3, rotor, 4, motor stator, 5, rotary output axis, 6, branch sleeve, 7, upper center tube, 8, spline slider, 9, mud overcurrent axle, 10, splined sleeve, 11, mud crosses chute A, 12, sliding sleeve, 13, packing element A, 14, spacer ring A, 15, lower center tube, 16, cone seat, 17, cone, 18, slips, 19, slip spider, 20, stage clip, 21, lower contact, 22, one way valve, 23, packing element B, 24, packing element C, 25, spacer ring B, 26, plugging plate, 27, mud crosses chute B, 28, mud crosses circulation groove, 29, external screw thread, 30, restricted driving groove.
Detailed description of the invention
This automatically controlled compression downhole blow-out preventer comprises upper center tube 7, lower center tube 15, toroidal torque motor, top connection 1, lower contact 21 and slips 18.Upper center tube 7 is provided with mud overcurrent axle 9, toroidal torque motor is equipped with by motor set casing 2 in mud overcurrent axle 9 one end.Toroidal torque motor is made up of rotary output axis 5, motor stator 4 and rotor 3, rotary output axis 5 is sleeved on upper center tube 7, rotary output axis 5 is threaded with mud overcurrent axle 9, motor stator 4 is arranged on rotary output axis 5, rotor 3 is housed between motor stator 4 and rotary output axis 5, rotor 3 and rotary output axis 5 are connected with a joggle, and rotor 3 drives rotary output axis 5 to rotate and output torque; Rotary output axis 5 drives mud overcurrent axle 9 to rotate.
One end of upper center tube 7 is provided with top connection 1 by motor set casing 2 screw thread, top connection 1 is provided with one way valve 22; When normally creeping into, one way valve 22 is closed, and after inside and outside annular space is all closed, opening one way valve 22, realizing mud circulation by building the pressure, and is replaced set up new balance by invading drilling fluid by well killing fluid.
The other end of upper center tube 7 is provided with lower center tube 15, and lower center tube 15 is threaded with upper center tube 7.Be provided with plugging plate 26 in the centre bore of upper center tube 7 one end, thus make the centre bore of upper center tube 7 be shutoff shape; On the tube wall of plugging plate 26 both sides, symmetry shape is provided with mud and crosses chute A11 and mud crosses chute B27.
Mud overcurrent axle 9 is provided with sliding sleeve 12 by splined sleeve 10, and the mud overcurrent axle 9 of sliding sleeve 12 side is equipped with spline slider 8, and spline slider 8 is threaded with sliding sleeve 12; Mud overcurrent axle 9 is threaded with spline slider 8 by the external screw thread 29 on its surface, and drives spline slider 8 to rotate.Mud overcurrent axle 9 is provided with and crosses chute A11 and mud with mud and cross mud corresponding to chute B27 and cross circulation groove 28.During normal work, mud is crossed chute A11 and mud and is crossed and cross circulation groove 28 by mud between chute B27 and communicate, and mud freely can pass through and enter in lower center tube 15.When well kick or blowout occur, start toroidal torque motor, mud overcurrent axle 9 is driven to rotate, by controlling the rotating cycle of annular torque motor, when toroidal torque motor is stopped, mud on upper center tube 7 crosses chute A11, mud crosses chute B27 and mud on mud overcurrent axle 9 is crossed circulation groove 28 and staggered 60 degree, thus the mud blocked on upper center tube 7 crosses chute A11 and mud crosses chute B27, and then the packing of annular space in realizing.
Be provided with branch sleeve 6 between splined sleeve 10 and motor set casing 2, branch sleeve 6 is threaded with motor set casing 2 and splined sleeve 10 respectively.
The lower center tube 15 of sliding sleeve 12 side is provided with packing element A13, packing element B23 and packing element C24 by spacer ring A14 and spacer ring B25 interval shape, the lower center tube 15 of packing element C24 side is provided with centrum 17 by centrum seat 16, and the ends screw of lower center tube 15 is provided with lower contact 21; The lower center tube 15 of lower contact 21 side is provided with slip spider 19 by stage clip 20, slip spider 19 is equipped with slips 18, centrum 17 is connected with slips 18 wedging.
The toroidal torque motor of this automatically controlled compression downhole blow-out preventer is controlled by ground by wire, the inner side of splined sleeve 10 is provided with restricted driving groove 30, to limit the stroke of spline slider 8, avoids in packing process, mud enters into threaded engagement part, affects the normal work of preventer.
When this automatically controlled compression downhole blow-out preventer normally creeps in the course of the work, toroidal torque motor does not work, mud crosses chute A11 by the mud on upper center tube 7, mud crosses chute B27 and mud on mud overcurrent axle 9 is crossed circulation groove 28 and entered lower center tube 15, enter shaft bottom, cleaning cooling drill bit.
When there is well kick anomaly in down-hole, transmit control signal by giving toroidal torque motor, toroidal torque motor starts to rotate, rotary output axis 5 and mud overcurrent axle 9 is driven to rotate, because spline slider 8 is subject to the restricted driving groove 30 circumference constraint of spline sleeve 10, can only rectilinear motion, thus promote the sliding sleeve 12 each packing element of compression downwards, realize the sealing of outer annular space thus.In this course, because sliding sleeve 12 is set on mud overcurrent axle 9, upper end is threaded with spline slider 8, and forms compression situation to each packing element.When normally creeping into, sliding sleeve 12 is fixed on spline slider 8, does not compress each packing element; When downhole blow-out preventer works, sliding sleeve 12 just forms compression to each packing element, and promotes cone 17 and move downward, and slips 18 is softened, and slips 18 is under the effect of slip spider 19 and stage clip 20, and card jail is on casing wall.
This automatically controlled compression downhole blow-out preventer is by controlling stroke (L=n+1/6) p of spline slider 8, (p is the pitch of spline slider 8 and mud overcurrent axle 9 matching thread, n positive integer,) specify stroke L when spline slider 8 moves to, when encountering restricted driving groove 30 termination on splined sleeve 10, toroidal torque motor stalls, the chute of crossing on upper center tube 7 and mud overcurrent axle 9 staggers 60 degree, the sealing of annular space in realizing thus.
After realizing the packing of inner ring annular space, opening one way valve 22 by building the pressure, realizing mud circulation, then replaced by well killing fluid and set up new balance by invading drilling fluid.
During deblocking, transmit control signal by again giving toroidal torque motor, toroidal torque motor reversal, drive sliding sleeve 12 to move upward, be returned to initial position, the mud on upper center tube 7 crosses chute A11, mud crosses chute B27 and mud on mud overcurrent axle 9 is crossed circulation groove 28 overlap and coincide, interior annular space deblocking, each packing element under the effect of its own resilient, slips 18 under the effect of stage clip 20, restore to the original state, can proceed normally to creep into operation.
This automatically controlled compression downhole blow-out preventer structure is simple, easy to maintenance, the packing of inside and outside annular space is realized by toroidal torque motor, improve the automatization level of downhole blow-out preventer, do not need to realize setting and deblocking by lift power on working rig or rotation tubing string, it also avoid and realize top tubing string press down packing element by cutting off pin, can repeatedly use, decrease the maintenance of downhole blow-out preventer and change number of times.
Claims (4)
1. an automatically controlled compression downhole blow-out preventer, comprise upper center tube (7), lower center tube (15), toroidal torque motor, top connection (1), lower contact (21) and slips (18), it is characterized in that: upper center tube (7) is provided with mud overcurrent axle (9), toroidal torque motor is equipped with by motor set casing (2) in mud overcurrent axle (9) one end, described toroidal torque motor is by rotary output axis (5), motor stator (4) and rotor (3) are formed, rotary output axis (5) is sleeved on upper center tube (7), rotary output axis (5) is threaded with mud overcurrent axle (9), motor stator (4) is arranged on rotary output axis (5), rotor (3) is housed between motor stator (4) and rotary output axis (5), rotor (3) and rotary output axis (5) are connected with a joggle, one end of upper center tube (7) is provided with top connection (1) by motor set casing (2) screw thread, top connection (1) is provided with one way valve (22), the other end of upper center tube (7) is provided with lower center tube (15), and lower center tube (15) is threaded with upper center tube (7), mud overcurrent axle (9) is provided with sliding sleeve (12) by splined sleeve (10), the mud overcurrent axle (9) of sliding sleeve (12) side is equipped with spline slider (8), and spline slider (8) is threaded with sliding sleeve (12), mud overcurrent axle (9) is threaded with spline slider (8) by the external screw thread (29) on its surface, be provided with branch sleeve (6) between splined sleeve (10) and motor set casing (2), branch sleeve (6) is threaded with motor set casing (2) and splined sleeve (10) respectively, by spacer ring A(14 on the lower center tube (15) of sliding sleeve (12) side) and spacer ring B(25) interval shape is provided with packing element A(13), packing element B(23) and packing element C(24), packing element C(24) side lower center tube (15) on by centrum seat (16), centrum (17) is installed, the ends screw of lower center tube (15) is provided with lower contact (21), the lower center tube (15) of lower contact (21) side is provided with slip spider (19) by stage clip (20), slip spider (19) is equipped with slips (18), centrum (17) is connected with slips (18) wedging.
2. the automatically controlled compression downhole blow-out preventer of one according to claim 1, it is characterized in that: be provided with plugging plate (26) in described upper center tube (7) one end centre bore, on the tube wall of plugging plate (26) both sides, symmetry shape is provided with mud and crosses chute A(11) and mud cross chute B(27).
3. the automatically controlled compression downhole blow-out preventer of one according to claim 1, is characterized in that: described mud overcurrent axle (9) is provided with and crosses chute A(11) and mistake chute B(27) corresponding mud crosses circulation groove (28).
4. the automatically controlled compression downhole blow-out preventer of one according to claim 1, is characterized in that: the inner side of described splined sleeve (10) is provided with restricted driving groove (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420583047.0U CN204060607U (en) | 2014-10-10 | 2014-10-10 | A kind of automatically controlled compression downhole blow-out preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420583047.0U CN204060607U (en) | 2014-10-10 | 2014-10-10 | A kind of automatically controlled compression downhole blow-out preventer |
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| CN204060607U true CN204060607U (en) | 2014-12-31 |
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| CN201420583047.0U Expired - Fee Related CN204060607U (en) | 2014-10-10 | 2014-10-10 | A kind of automatically controlled compression downhole blow-out preventer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314506A (en) * | 2014-10-10 | 2015-01-28 | 长江大学 | Electric-control compression type downhole blow-out preventer |
| CN107060681A (en) * | 2017-04-13 | 2017-08-18 | 长江大学 | A kind of deep water packer |
| US11708738B2 (en) | 2020-08-18 | 2023-07-25 | Schlumberger Technology Corporation | Closing unit system for a blowout preventer |
-
2014
- 2014-10-10 CN CN201420583047.0U patent/CN204060607U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314506A (en) * | 2014-10-10 | 2015-01-28 | 长江大学 | Electric-control compression type downhole blow-out preventer |
| CN107060681A (en) * | 2017-04-13 | 2017-08-18 | 长江大学 | A kind of deep water packer |
| CN107060681B (en) * | 2017-04-13 | 2023-03-14 | 长江大学 | Deep water packer |
| US11708738B2 (en) | 2020-08-18 | 2023-07-25 | Schlumberger Technology Corporation | Closing unit system for a blowout preventer |
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| 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: 20141231 Termination date: 20161010 |
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| CF01 | Termination of patent right due to non-payment of annual fee |