CN105422042B - Drilling-free two-stage cementing device - Google Patents
Drilling-free two-stage cementing device Download PDFInfo
- Publication number
- CN105422042B CN105422042B CN201510918464.5A CN201510918464A CN105422042B CN 105422042 B CN105422042 B CN 105422042B CN 201510918464 A CN201510918464 A CN 201510918464A CN 105422042 B CN105422042 B CN 105422042B
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- Prior art keywords
- plug
- gravity
- closing
- cylinder
- obturating
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- 230000005484 gravity Effects 0.000 claims abstract description 115
- 239000002002 slurry Substances 0.000 claims abstract description 44
- 239000010985 leather Substances 0.000 claims abstract description 36
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000004568 cement Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 241001074085 Scophthalmus aquosus Species 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000009955 starching Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to the technical field of cementing devices, and discloses a drilling-free two-stage cementing device, which comprises: the device comprises an upper joint, a closing cylinder telescopic locking block, a closing cylinder starting shear pin, a closing cylinder sliding shear pin, a closing plug seat, an outer cylinder, a cement injection hole, a gravity opening plug seat starting shear pin, a gravity opening plug seat sliding shear pin, a gravity opening plug seat, a flexible plug cylinder telescopic locking block, a flexible plug cylinder shear pin, a flexible plug seat, a flexible plug cylinder, a lower joint, a slurry replacing plug leather cup, a slurry replacing plug central tube, a closing plug leather cup, a closing plug central tube, a gravity opening plug upper end cover, a gravity opening plug weighting lead block, a gravity opening plug shell, a flexible plug leather cup, a flexible plug central tube and a flexible plug guide head. The drilling-free two-stage cementing device provided by the embodiment of the invention naturally falls to the bottom of the well under the action of gravity, eliminates the barrier effect of a closing plug cup on fluid in the falling process, is favorable for falling, and ensures the construction quality and success rate.
Description
Technical field
The present invention relates to hook-up for cementing technical field, more particularly to one kind is exempted to bore two stage cementing device.
Background technology
Cementing well tool is to be drilled in well construction operation a kind of common cement infusion well cementing device.
Existing two stage cementing cementing unit, level-one cementing terminate that a large amount of cement can be remained in rear sleeve, lead to one
Grade cementing success rate is relatively low.To the Probability maximum of shaft bottom dropping process and casing card resistance, these all reduce and apply existing tool
The success rate of work, finally influences cementing quality.And need brill plug or drifting operation that could solve.
Invention content
The present invention provides one kind and exempts to bore two stage cementing device, and solution will bore plug or drifting, one in the prior art, after construction
Success rate is low and tool falls into the low success rate of problem in shaft bottom for starching for grade cementing job.
In order to solve the above technical problems, exempt to bore two stage cementing device the present invention provides one kind, including：Top connection (1),
Lower contact (16) and outer barrel (7)；Further include：Shut-off plug module, gravity open plug module and around property plug modules；
The shut-off plug module includes：Shut-off plug closes cylinder (2), closes the flexible closing piece (3) of cylinder, closes cylinder startup shear pin
(4), it closes cylinder sliding shear pin (5) and closes obturating plug (6)；
The closing cylinder (2) and the outer barrel (7) are cylindrical shape, and the closing cylinder (2) is arranged in the outer barrel (7)
It is interior, the outer barrel (7) top is fixed on by the flexible closing piece (3) of the closing cylinder；
The closing obturating plug (6) starts shear pin (4) by the closing cylinder and is fixed on closing cylinder (2) upper inside wall；
First groove is set on the closing obturating plug (6), and the closing cylinder sliding shear pin (5) is fixed on the closing cylinder (2), deeply
In first groove, and for along the bar-shaped trough for closing cylinder (2) axial direction in first groove；
The gravity opens plug module：Gravity opens plug, gravity opens obturating plug and starts shear pin (9), gravity opening plug
Seat sliding shear pin (10) and gravity open obturating plug (11)；
The gravity opens obturating plug (11) and is fixed on the closing cylinder (2) by gravity opening plug startup shear pin (9)
Inner wall lower；The gravity, which is opened, is arranged the second groove on obturating plug (11), the gravity opens plug startup shear pin (9) and is fixed on institute
It states and closes on cylinder (2), go deep into second groove, and for along the bar shaped for closing cylinder (2) axial direction in second groove
Slot；
It is described to include around property plug module：Around property plug, around property plug tube stretch closing piece (12), around property plug tube shear pin (13), around property
Obturating plug (14) and around property plug tube (15)；
Described around property plug tube (15) is cylindrical shape, and setting is locked around property plug tube is flexible by described in the closings cylinder (2)
Block (12) is fixed on closing cylinder (2) lower part；
It is described to be fixed on closing cylinder (2) inner wall around property plug tube shear pin (13) by described around property obturating plug (14)；
Wherein, cementing hole (8) is opened up on outer barrel (7) side wall, and is opened up in the corresponding position of the closing cylinder (2)
Through-hole；
The top connection (1) and lower contact (16) are separately fixed at the outer barrel (7) top and bottom；The lower contact
(16) positive stop lug boss is set on inner wall, limits the downslide displacement for closing cylinder (2)；
The closing obturating plug (6) is located above the through-hole, the gravity opens obturating plug (11) and blocks the through-hole；
The radius of the shut-off plug is more than the radius that the gravity opens plug, and the radius that the gravity opening is filled in is more than described
Around the radius of property plug；
The closing obturating plug (6), gravity open obturating plug (11) and are tubular structure around property obturating plug (14).
Further, further include：It is filled in for slurry；
Wherein, described to include for slurry plug：For slurry plug central tube (18) and it is fixed on its external wall for slurry plug leather cup
(17)；
Described for slurry plug central tube (18) is hollow tube, described around property plug tube (15) inner wall by replacing slurry plug shear pin to be fixed on
On；
The edge for slurry plug leather cup (17) is resisted against on the lower contact inner wall；
The radius around property plug is more than the caliber for slurry plug central tube (18).
Further, it is described for slurry plug leather cup (17) include multilayer laminated setting dentation fringe edge, be resisted against it is described under
On connector (16) inner wall.
Further, the gravity, which is opened to fill in, includes：Cock body；
Bulb is arranged in the cock body tail portion, can cover and seal the nozzle that the gravity opens obturating plug (11).
Further, weight is set in the cock body.
Further, step-like teeth structure is arranged in the bulb lower part of the cock body, and the gravity opens obturating plug (11)
Internal wall of pipe orifice on engageable matched step-like teeth structure therewith is set.
Further, lock ring slot is arranged in the top of the bulb of the cock body, what the shut-off plug bottom setting matched
Lock ring slot makes the two that can be fixedly connected.
Further, lock ring slot is set at the top of the closing obturating plug (6) on tube wall, is arranged in the middle part of the shut-off plug and matches
Lock ring slot, both make to be fixedly connected.
Further, the shut-off plug top setting shut-off plug leather cup (19)；It is described that around property, portion is arranged around property plug plug beyond the Great Wall
Leather cup (24).
Further, described that around property plug bottom, seeker is set.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages：
1, what is provided in the embodiment of the present application exempts from brill two stage cementing device, can be carried out continuously two stage cementing operation,
Do not have to bore plug after operation.It is final whole to close cylinder 2, the flexible closing piece 3 of closing cylinder, closing obturating plug 6 and gravity opening obturating plug 11
It locks together, and outer diameter is less than casing inner diameter, falls on shaft bottom naturally under the effect of gravity, is not necessarily to lower tubular column drifting, saves significantly
The time has been saved, has been improved work efficiency.
2, what is provided in the embodiment of the present application exempts to bore two stage cementing device, the design sealing for slurry plug leather cup 17 of use
It works well, is used cooperatively with around property plug, fully ensured that level-one is cemented for slurry success rate, after level-one cementing terminates
Ensure not stay cement in casing.
3, what is provided in the embodiment of the present application exempts from brill two stage cementing device, is closed using the 19 final retraction of shut-off plug leather cup
In obturating plug 6, shut-off plug leather cup 19 is eliminated in dropping process to the inhibition of fluid, is conducive to fall, ensures construction quality.
4, what is provided in the embodiment of the present application exempts to bore two stage cementing device, and gravity opens plug module and executes unlatching cementing
The foundation of inner-outer circulation is realized in the operation in hole 8；The process for closing cementing hole 8 for coordinating shut-off plug module, realizes two level water filling
Mud operates；Fluent movements between structure, keying flow is smooth, greatly improves cementing efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram provided in an embodiment of the present invention for exempting to bore two stage cementing device；
Fig. 2 is the structural schematic diagram provided in an embodiment of the present invention for closing cylinder；
Fig. 3 is the structural schematic diagram that gravity provided in an embodiment of the present invention opens plug；
Fig. 4 is the structural schematic diagram provided in an embodiment of the present invention around property plug；
Fig. 5 is the structural schematic diagram provided in an embodiment of the present invention thrown around property plug；
Fig. 6 is the structural schematic diagram that throwing gravity provided in an embodiment of the present invention opens plug；
Fig. 7 is the structural schematic diagram provided in an embodiment of the present invention for throwing shut-off plug.
Specific implementation mode
The embodiment of the present application is exempted to bore two stage cementing device by providing one kind, solves in the prior art, to bore after construction
Plug or drifting, success rate is low and tool falls into the low success rate of problem in shaft bottom for starching for level-one cementing job；Reach and has promoted to apply
Tool smoothly falls into shaft bottom after work, and cement is not remained in pipe sleeve, promotes the technique effect of operation success rate and efficiency.
In order to solve the above technical problems, the general thought that the embodiment of the present application provides technical solution is as follows：
One kind is exempted to bore two stage cementing device, including：Top connection 1, lower contact 16 and outer barrel 7；Further include：Shut-off plug mould
Block, gravity open plug module and around property plug modules；
The shut-off plug module includes：Shut-off plug closes cylinder 2, closes the flexible closing piece 3 of cylinder, close cylinder startup shear pin 4, close
It closes cylinder sliding shear pin 5 and closes obturating plug 6；
The closing cylinder 2 and the outer barrel 7 are cylindrical shape, and the closing cylinder 2 is arranged in the outer barrel 7, passes through institute
It states and closes the cylinder closing piece that stretches and 3 be fixed on 7 top of the outer barrel；
The closing obturating plug 6 starts shear pin 4 by the closing cylinder and is fixed on 2 upper inside wall of closing cylinder；The pass
First groove is set on occlusion seat 6, and the closing cylinder sliding shear pin 5 is fixed on the closing cylinder 2, gos deep into first groove
It is interior, and for along the 2 axial bar-shaped trough of closing cylinder in first groove；
The gravity opens plug module：Gravity opens plug, gravity opens obturating plug and starts shear pin 9, gravity opening obturating plug
It slides shear pin 10 and gravity opens obturating plug 11；
The gravity is opened obturating plug 11 and is fixed under 2 inner wall of closing cylinder by gravity opening plug startup shear pin 9
Portion；The gravity, which is opened, is arranged the second groove on obturating plug 11, the gravity opens plug startup shear pin 9 and is fixed on the closing cylinder 2
On, go deep into second groove, and for along the 2 axial bar-shaped trough of closing cylinder in second groove；
It is described to include around property plug module：Around property plug, around property plug tube stretch closing piece 12, around property plug tube shear pin 13, around property obturating plug
14 and around property plug tube 15；
Described around property plug tube 15 is cylindrical shape, is arranged in the closings cylinder 2, by described around the flexible closing piece of property plug tube 12
It is fixed on 2 lower part of closing cylinder；
It is described to be fixed on 2 inner wall of closing cylinder around property plug tube shear pin 13 by described around property obturating plug 14；
Wherein, cementing hole 8 is opened up on 7 side wall of the outer barrel, and opens up through-hole in the corresponding position for closing cylinder 2；
The top connection 1 and lower contact 16 are separately fixed at 7 top and bottom of the outer barrel；The inner wall of the lower contact 16
Upper setting positive stop lug boss limits the downslide displacement for closing cylinder 2；
The closing obturating plug 6 is located above the through-hole, the gravity opens obturating plug 11 and blocks the through-hole；
The radius of the shut-off plug is more than the radius that the gravity opens plug, and the radius that the gravity opening is filled in is more than described
Around the radius of property plug；
The closing obturating plug 6, gravity open obturating plug 11 and are tubular structure around property obturating plug 14.
Through the above as can be seen that by being brought into described in device around property plug, apply pressure by injecting cement
Around property plug module action described in power drive, release is described to open the gravity and opens plug module around the flexible closing piece 12 of property plug tube, then
The gravity plug is put into, applies gravity opening plug module action described in pressure-driven by injecting cement, the gravity is opened
Obturating plug 11 pushes down on, and gradually exposes the cementing hole (8), and outer cycle of establishing carries out two level cementing in the device；Then
The shut-off plug is put into, applies shut-off plug module action described in pressure-driven by injecting cement, pushes the closing cylinder 2 gradually
The cementing hole 8 is closed, operation is completed.Realize that continuous cementing, guarantee tool smoothly fall well, operating efficiency greatly improves；
Brill plug drifting is avoided simultaneously, ensures the cemented success rate of level-one.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
It states technical solution to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the application skill
The detailed description of art scheme, rather than to the restriction of technical scheme, in the absence of conflict, the embodiment of the present application
And the technical characteristic in embodiment can be combined with each other.
Embodiment one
Referring to Fig. 1, hook-up for cementing provided in this embodiment, including：Top connection 1, lower contact 16 and outer barrel 7；Also wrap
It includes：Shut-off plug module, gravity open plug module and around property plug modules；
The shut-off plug module includes：Shut-off plug closes cylinder 2, closes the flexible closing piece 3 of cylinder, close cylinder startup shear pin 4, close
It closes cylinder sliding shear pin 5 and closes obturating plug 6；
The closing cylinder 2 and the outer barrel 7 are cylindrical shape, and the closing cylinder 2 is arranged in the outer barrel 7, passes through institute
It states and closes the cylinder closing piece that stretches and 3 be fixed on 7 top of the outer barrel；
The closing obturating plug 6 starts shear pin 4 by the closing cylinder and is fixed on 2 upper inside wall of closing cylinder；The pass
First groove is set on occlusion seat 6, and the closing cylinder sliding shear pin 5 is fixed on the closing cylinder 2, gos deep into first groove
It is interior, and for along the 2 axial bar-shaped trough of closing cylinder in first groove；
The gravity opens plug module：Gravity opens plug, gravity opens obturating plug and starts shear pin 9, gravity opening obturating plug
It slides shear pin 10 and gravity opens obturating plug 11；
The gravity is opened obturating plug 11 and is fixed under 2 inner wall of closing cylinder by gravity opening plug startup shear pin 9
Portion；The gravity, which is opened, is arranged the second groove on obturating plug 11, the gravity opens plug startup shear pin 9 and is fixed on the closing cylinder 2
On, go deep into second groove, and for along the 2 axial bar-shaped trough of closing cylinder in second groove；
It is described to include around property plug module：Around property plug, around property plug tube stretch closing piece 12, around property plug tube shear pin 13, around property obturating plug
14 and around property plug tube 15；
Described around property plug tube 15 is cylindrical shape, is arranged in the closings cylinder 2, by described around the flexible closing piece of property plug tube 12
It is fixed on 2 lower part of closing cylinder；
It is described to be fixed on 2 inner wall of closing cylinder around property plug tube shear pin 13 by described around property obturating plug 14；
Wherein, cementing hole 8 is opened up on 7 side wall of the outer barrel, and opens up through-hole in the corresponding position for closing cylinder 2；
The top connection 1 and lower contact 16 are separately fixed at 7 top and bottom of the outer barrel；The inner wall of the lower contact 16
Upper setting positive stop lug boss limits the downslide displacement for closing cylinder 2；
The closing obturating plug 6 is located above the through-hole, the gravity opens obturating plug 11 and blocks the through-hole；
The radius of the shut-off plug is more than the radius that the gravity opens plug, and the radius that the gravity opening is filled in is more than described
Around the radius of property plug；
The closing obturating plug 6, gravity open obturating plug 11 and are tubular structure around property obturating plug 14.
The structure of the hook-up for cementing and the use in operation process will be introduced respectively below.
First, structure is introduced.
Referring to Fig. 3, the gravity opens plug and includes：Cock body；
Bulb is arranged in the cock body tail portion, can cover and seal the nozzle that the gravity opens obturating plug 11.
Weight is set in the cock body, the highdensity material such as lead may be used.
Step-like teeth structure is arranged in the bulb lower part of the cock body, and the gravity is opened on the internal wall of pipe orifice of obturating plug 11
Engageable matched step-like teeth structure therewith is set.
Lock ring slot is arranged in the top of the bulb of cock body, and the lock ring slot to match is arranged in shut-off plug bottom, makes the two that can consolidate
Fixed connection.
Referring to Fig. 2, closes and lock ring slot is set on 6 top tube wall of obturating plug, the lock ring that setting matches in the middle part of the shut-off plug
Slot makes the two that can be fixedly connected.
Shut-off plug leather cup 19 is arranged in shut-off plug top；It is described that around property, portion is arranged around property plug plug leather cup 24 beyond the Great Wall.
Referring to Fig. 4, seeker is set around property plug bottom, convenient for across each structure.
Specifically, topmost inside can open up internal thread for top connection 1, convenient for being connected with casing.Lower end outside is provided with outer
Screw thread is fixedly connected with outer barrel 7 by screw thread, is constituted and firm is vertically connected with relationship.
7 middle part of outer barrel is provided with cementing hole 8.
1 internal face of top connection has ladder, and the upper surface for closing cylinder 2 is withstood on ladder, and vibrations is avoided to cause structural cut piece.
It closes the middle part of cylinder 2 and opens up square hole, place and close cylinder and stretch closing piece 3.Middle part is drilled with circular hole, places closing cylinder startup and cuts
Nail 4.It closes 2 middle part of cylinder and is provided with circular hole, place and close cylinder sliding shear pin 5.It closes 2 lower part of cylinder and is provided with circular hole, place gravity and open
Obturating plug starts shear pin 9.It closes 2 lower part of cylinder and is provided with circular hole, place gravity and open obturating plug sliding shear pin 10.Cylinder is closed to stretch closing piece 3
It is fixed together with the groove cooperation on the inside of 7 upper end of outer barrel.Cylinder startup shear pin 4 is closed to be fixed on closing cylinder 2 with obturating plug 6 is closed
Together.Cylinder sliding shear pin 5 is closed to slide up and down in the rectangular elongated slot for closing obturating plug 6.6 upper outside of obturating plug is closed in radial side
It holds out against upwards and closes cylinder and stretch closing piece 3.Effective fixed and locking is realized by shear pin and closing piece, is gradually being pressurized, clipping is cut
Nail, the fixed structure of release institute realize the foundation and closing of the inside cycle of hook-up for cementing.
It closes 6 upper inner of obturating plug and is provided with lock ring slot, be connected and fixed with the lock ring slot at 20 middle part of shut-off plug center-pole.Outer barrel
7 lower ends are provided with internal thread, can be connected and fixed by external screw thread with lower contact 16.
Gravity opening obturating plug startup shear pin 9 will close cylinder 2 and gravity opens obturating plug 11 and is fixed together.Gravity opens obturating plug
Sliding shear pin 10 slides up and down in the rectangular elongated slot that gravity opens obturating plug 11.Gravity is opened and is provided with rank inside 11 upper end of obturating plug
Ladder, gravity open end cap 21 beyond the Great Wall and hold out against and be fixed on ladder, realize sealing and fixed function.
It is fixed together with the groove cooperation inside 2 lower end of closing cylinder around the flexible closing piece 12 of property plug tube.Around property plug tube shear pin
13 will be fixed together around property obturating plug 14 and around property plug tube 15.It holds out against around 14 upper end of property obturating plug and is stretched around property plug tube in radial directions
Contracting closing piece 12.It is provided with lock ring slot inside 14 upper end of property obturating plug, is connected and fixed with the lock ring slot around 26 middle part of property plug seeker.Around
Property 15 lower end of plug tube be provided with square hole, place and stretch closing piece 12 around property plug tube.It is provided with circular hole around 15 lower end of property plug tube, is placed around property plug
Cylinder shear pin 13.
Shut-off plug leather cup 19 coordinates with the sealing of 6 internal face of obturating plug is closed.Shut-off plug leather cup 19 is sleeved on shut-off plug center-pole 20
On.19 lower face of shut-off plug leather cup is withstood on the step at 20 middle part of shut-off plug center-pole.20 lower end outside of shut-off plug center-pole is opened
There is lock ring slot, the lock ring slot opened on the inside of 21 upper end of end cap beyond the Great Wall with gravity is connected and fixed.Gravity opens 21 lower part of end cap beyond the Great Wall
It is provided with external screw thread, open plug shell 23 with gravity is fixedly connected by screw thread.Gravity opens plug exacerbation lead 22 and is placed on gravity
It opens inside plug shell 23.It is sleeved on property plug center-pole 25 around property plug leather cup 24.It is withstood on around property around 24 lower face of property plug leather cup
Fill in 26 upper surface of seeker.It is provided with external screw thread around 25 lower end of property plug center-pole, passes through screw thread phase fixed with around property plug seeker 26
It is fixed.
16 lower end outside of lower contact is provided with external screw thread, is fixedly connected with casing.
It is provided with ladder on the inside of 16 upper end of lower contact, closes cylinder 2 and finally holds out against on ladder.
Embodiment two increases on the basis of embodiment one for slurry plug module.
Include for slurry plug：For slurry plug central tube (8 and it is fixed on its external wall for slurry plug leather cup 17；It is described to be filled in for slurry
Central tube 18 is hollow tube, described on 15 inner wall of property plug tube by replacing slurry plug shear pin to be fixed on；
The edge for slurry plug leather cup 17 is resisted against on the lower contact inner wall；
The radius around property plug is more than the caliber for slurry plug central tube 18.
The dentation fringe edge for including multilayer laminated setting for slurry plug leather cup 17, is resisted against 16 inner wall of the lower contact
On.Promote the effect of removal residual mud.
It is provided with internal thread on the inside of 15 bottom of property plug tube, is connect with the external screw thread for 18 upper end of slurry plug central tube solid
It is fixed.It is withstood on for the upper surface of slurry plug leather cup 17 around the lower face of property plug tube 15.
It is sleeved on slurry plug central tube 18 for slurry plug leather cup 17.It is withstood on for slurry plug central tube 18 for 17 lower face of slurry plug leather cup
On the step of lower end.Coordinate for slurry plug leather cup 17 and the sealing of 16 internal face of lower contact.
The course of work is described below.
During construction operation, exempt to bore internal thread and casing connection tripping in of the two stage cementing device by top connection 1
Precalculated position in well carries out level-one cementing job.
It is put into around property plug after injecting the cement of design flow referring to Fig. 5, level-one cementing job, squeezing into mud into casing pushes away
It is dynamic around property plug downlink, until locking together with meeting around property obturating plug 14, continue to suppress to certain pressure around property plug tube shear pin 13
It is cut, is run down to for slurry plug central tube 18 upper surface around property obturating plug 14, is released around the property plug tube closing piece 12 that stretches, around property
Plug tube 15 is detached with cylinder 2 is closed.Continue to suppress then around property plug, around the flexible closing piece 12 of property plug tube, around property plug tube shear pin 13, around property plug
Seat 14 moves to shaft bottom downwardly together around property plug tube 15, for slurry plug leather cup 17, for slurry plug central tube 18, fills in leather cup 17 for slurry
Under the action of, the cement of inside pipe casing is all extruded outside casing.
Referring to Fig. 6, continue to put into gravity and open to fill in, it freely falls to gravity and opens obturating plug under the effect of gravity
On 11, continue to suppress to certain pressure, gravity is opened obturating plug startup shear pin 9 and cut, and gravity opens plug and opens obturating plug with gravity
11 open the rectangular elongated slot slide downward of 11 lower end of obturating plug along gravity together, and after sliding a distance, gravity opens obturating plug cunning
Dynamic shear pin 10 is located at the upper end of rectangular elongated slot, blocks gravity and opens obturating plug 11 and continues to glide, at this point, cementing hole 8 opening,
Establish the cementing channel of top pit shaft.
Referring to Fig. 7, two level cementing job is carried out, after injecting the cement of design flow, shut-off plug is put into, is squeezed into casing
Mud pushes shut-off plug downlink, goes downwards to certain position, and 20 middle part of shut-off plug center-pole locks together with obturating plug 6 is closed, closes
Occlusion 19 retraction of leather cup is closed in obturating plug 6, continues to suppress to certain pressure, is closed cylinder startup shear pin 4 and is cut, shut-off plug and pass
Seat 6 is occluded together along the rectangular elongated slot slide downward for closing 6 lower end of obturating plug, after sliding a distance, is closed cylinder and is slided shear pin 5
It positioned at the upper end of rectangular elongated slot, blocks and closes obturating plug 6 and continue to glide, during this period, close the cylinder closing piece 3 that stretches and discharge, close
It closes the flexible closing piece 3 of cylinder to detach with outer barrel 7, simultaneously closing off plug 20 lower part of center-pole, end cap 21 is locked in one beyond the Great Wall with gravity opening
It rises, such gravity opens plug and shut-off plug is just connected to become an entirety.Continue to suppress, closes obturating plug 6 by closing cylinder sliding
Shear pin 5 drives closing cylinder 2 to move down, and gravity opens obturating plug 11 and drives closing cylinder 2 by gravity opening obturating plug sliding shear pin 10
It moves down, closes cylinder 2 and close cementing hole 8, the lower face for closing cylinder 2 finally withstands on the ladder on the inside of 16 upper end of lower contact
On.Continue to suppress, cylinder sliding shear pin 5 will be closed and gravity is opened obturating plug sliding shear pin 10 and cut simultaneously, shut-off plug leather cup 19 closes
Occluding center-pole 20, closing obturating plug 6, gravity opening, end cap 21, gravity opening plug aggravate lead 22 beyond the Great Wall, gravity opening fills in shell
23, gravity opens obturating plug 11 and falls into shaft bottom together as a whole, eliminates and bores plug flow journey, and two stage cementing operation terminates.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages：
1, what is provided in the embodiment of the present application exempts from brill two stage cementing device, can be carried out continuously two stage cementing operation,
Do not have to bore plug after operation.It is final whole to close cylinder 2, the flexible closing piece 3 of closing cylinder, closing obturating plug 6 and gravity opening obturating plug 11
It locks together, and outer diameter is less than casing inner diameter, falls on shaft bottom naturally under the effect of gravity, is not necessarily to lower tubular column drifting, saves significantly
The time has been saved, has been improved work efficiency.
2, what is provided in the embodiment of the present application exempts to bore two stage cementing device, the design sealing for slurry plug leather cup 17 of use
It works well, is used cooperatively with around property plug, fully ensured that level-one is cemented for slurry success rate, after level-one cementing terminates
Ensure not stay cement in casing.
3, what is provided in the embodiment of the present application exempts from brill two stage cementing device, is closed using the 19 final retraction of shut-off plug leather cup
In obturating plug 6, shut-off plug leather cup 19 is eliminated in dropping process to the inhibition of fluid, is conducive to fall, ensures construction quality.
4, what is provided in the embodiment of the present application exempts to bore two stage cementing device, and gravity opens plug module and executes unlatching cementing
The foundation of inner-outer circulation is realized in the operation in hole 8；The process for closing cementing hole 8 for coordinating shut-off plug module, realizes two level water filling
Mud operates；Fluent movements between structure, keying flow is smooth, greatly improves cementing efficiency.
It should be noted last that the above specific implementation mode is merely illustrative of the technical solution of the present invention and unrestricted,
Although being described the invention in detail with reference to example, it will be understood by those of ordinary skill in the art that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit of the technical scheme of the invention and range, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. one kind is exempted to bore two stage cementing device, including：Top connection (1), lower contact (16) and outer barrel (7)；It is characterized in that,
Further include：Shut-off plug module, gravity open plug module and around property plug modules；
The shut-off plug module includes：Shut-off plug, close cylinder (2), close cylinder stretch closing piece (3), close cylinder start shear pin (4),
It closes cylinder sliding shear pin (5) and closes obturating plug (6)；
The closing cylinder (2) and the outer barrel (7) are cylindrical shape, and closing cylinder (2) setting is led in the outer barrel (7)
It crosses the flexible closing piece (3) of the closing cylinder and is fixed on the outer barrel (7) top；
The closing obturating plug (6) starts shear pin (4) by the closing cylinder and is fixed on closing cylinder (2) upper inside wall；It is described
It closes on obturating plug (6) and the first groove is set, the closing cylinder sliding shear pin (5) is fixed on the closing cylinder (2), deeply described
In first groove, and for along the bar-shaped trough for closing cylinder (2) axial direction in first groove；
The gravity opens plug module：Gravity opens plug, gravity opens obturating plug startup shear pin (9), gravity opening obturating plug is slided
Dynamic shear pin (10) and gravity open obturating plug (11)；
The gravity opens obturating plug (11) and is fixed on closing cylinder (2) inner wall by gravity opening plug startup shear pin (9)
Lower part；The gravity, which is opened, is arranged the second groove on obturating plug (11), the gravity opens plug startup shear pin (9) and is fixed on the pass
It closes on cylinder (2), gos deep into second groove, and for along the bar-shaped trough for closing cylinder (2) axial direction in second groove；
It is described to include around property plug module：Around property plug, around property plug tube stretch closing piece (12), around property plug tube shear pin (13), around property obturating plug
(14) and around property plug tube (15)；
Described around property plug tube (15) is cylindrical shape, and setting is in the closings cylinder (2), by described around the flexible closing piece of property plug tube
(12) it is fixed on closing cylinder (2) lower part；
It is described to be fixed on closing cylinder (2) inner wall around property plug tube shear pin (13) by described around property obturating plug (14)；
Wherein, it opens up cementing hole (8) on outer barrel (7) side wall, and opens up in the corresponding position of the closing cylinder (2) logical
Hole；
The top connection (1) and lower contact (16) are separately fixed at the outer barrel (7) top and bottom；The lower contact (16)
Positive stop lug boss is set on inner wall, limits the downslide displacement for closing cylinder (2)；
The closing obturating plug (6) is located above the through-hole, the gravity opens obturating plug (11) and blocks the through-hole；
The radius of the shut-off plug is more than the radius that the gravity opens plug, and the radius that the gravity opening is filled in is more than described around property
The radius of plug；
The closing obturating plug (6), gravity open obturating plug (11) and are tubular structure around property obturating plug (14).
2. as described in claim 1 exempt to bore two stage cementing device, which is characterized in that further include：It is filled in for slurry；
Wherein, described to include for slurry plug：For slurry plug central tube (18) and it is fixed on its external wall for slurry plug leather cup (17)；
Described for slurry plug central tube (18) is hollow tube, described on property plug tube (15) inner wall by replacing slurry plug shear pin to be fixed on；
The edge for slurry plug leather cup (17) is resisted against on the lower contact inner wall；
The radius around property plug is more than the caliber for slurry plug central tube (18).
3. as claimed in claim 2 exempt to bore two stage cementing device, it is characterised in that：It is described to fill in leather cup (17) including more for slurry
The dentation fringe edge of layer stackup setting, is resisted against on the lower contact (16) inner wall.
4. as claims 1 to 3 any one of them is exempted to bore two stage cementing device, which is characterized in that the gravity opens plug
Including：Cock body；
Bulb is arranged in the cock body tail portion, can cover and seal the nozzle that the gravity opens obturating plug (11).
5. as claimed in claim 4 exempt to bore two stage cementing device, it is characterised in that：Weight is set in the cock body.
6. as claimed in claim 5 exempt to bore two stage cementing device, it is characterised in that：The bulb lower part of the cock body is arranged
Step-like teeth structure, the gravity is opened is arranged engageable matched step-like teeth therewith on the internal wall of pipe orifice of obturating plug (11)
Structure.
7. as claimed in claim 6 exempt to bore two stage cementing device, it is characterised in that：It is set at the top of the bulb of the cock body
Lock ring slot is set, the lock ring slot to match is arranged in the shut-off plug bottom, makes the top of the bulb of cock body and the shut-off plug bottom
Portion can be fixedly connected.
8. as claimed in claim 7 exempt to bore two stage cementing device, it is characterised in that：Tube wall at the top of the closing obturating plug (6)
Upper setting lock ring slot, the lock ring slot that shut-off plug middle part setting matches make closing obturating plug (6) top and the closing
Plug middle part can be fixedly connected.
9. as claimed in claim 8 exempt to bore two stage cementing device, it is characterised in that：Shut-off plug is arranged in the shut-off plug top
Leather cup (19)；It is described that around property, portion is arranged around property plug leather cup (24) beyond the Great Wall.
10. as claimed in claim 7 exempt to bore two stage cementing device, it is characterised in that：Described be arranged around property plug bottom guides
Head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918464.5A CN105422042B (en) | 2015-12-10 | 2015-12-10 | Drilling-free two-stage cementing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918464.5A CN105422042B (en) | 2015-12-10 | 2015-12-10 | Drilling-free two-stage cementing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105422042A CN105422042A (en) | 2016-03-23 |
| CN105422042B true CN105422042B (en) | 2018-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510918464.5A Active CN105422042B (en) | 2015-12-10 | 2015-12-10 | Drilling-free two-stage cementing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111946295B (en) * | 2020-09-04 | 2022-10-04 | 中国石油天然气股份有限公司 | Plug seat |
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| CN105422042A (en) | 2016-03-23 |
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