CN208430986U - Switchable pitching sliding sleeve - Google Patents
Switchable pitching sliding sleeve Download PDFInfo
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- CN208430986U CN208430986U CN201820733659.1U CN201820733659U CN208430986U CN 208430986 U CN208430986 U CN 208430986U CN 201820733659 U CN201820733659 U CN 201820733659U CN 208430986 U CN208430986 U CN 208430986U
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- slip pipe
- shell
- sliding sleeve
- switchable
- lower contact
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- 230000004308 accommodation Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
A kind of switchable pitching sliding sleeve suitable for horizontal well, belong to oil gas industry downhole tool technical field, including top connection, shell, slip pipe, ball seat, lower contact, shear pin, top connection, shell, lower contact once connects, slip pipe is connected with shell by shear pin, slip pipe and ball seat are threadedly coupled, the shell and slip pipe offer multiple recirculation holes, the recirculation hole of shell and the recirculation hole of slip pipe are dislocatedly distributed, top connection, slip pipe and lower contact are designed with the serration type structure for adjusting recirculation hole relative position, by the way of rotarily opening sliding sleeve, realize that circulation passage fully opens.
Description
Technical field
The utility model relates to field of petroleum machinery, in particular to a kind of switchable pitching sliding sleeve.
Background technique
In recent years, horizontal well is because its own has the special feature that on the side of thin storage, hyposmosis, viscous crude oil-gas reservoir and small reserves
The advantage shown in the exploitation of border oil-gas reservoir etc. rapidly becomes China and improves oil gas well production and promote the comprehensive effect of oil field prospecting
The important means of benefit, however cause in low-permeability oil deposit exploitation because its permeability is lower, osmotic resistance is big, permeability is poor
Horizontal well well yield is also difficult to be promoted, it is difficult to meet the requirement of economic development, then horizontal well storey increase design problem quarter is not allowed
It is slow, for this purpose, having developed horizontal well fracturing pitching slip pipe.
Horizontal well fracturing pitching slip pipe have combined in structure it is relatively simple, operate in construction it is more convenient,
Can realize that the sleective fracturing transformation of reservoir and conjunction are adopted in the case where fixed tubular column in horizontal well, and each lamination split successively into
The advantages of row, operating risk is small, effectively shortens the activity duration with increasing production, so that horizontal well fracturing pitching slip pipe is in the industry
It is widely used.
However after existing pitching slip pipe is all pitching, certain displacement liquid pumps ball to ball seat position, and ball is matched with ball seat
It closes after realizing upper tube column sealing, then after suppressing shear pin by oil pipe, promotion slip pipe downlink opens circulation passage.It is sliding
The unlatching of pipe is all to realize that slip pipe is opened by the pressure action power of shear pin and the active force of a fixed displacement fluid.Slip pipe
Circulation passage is gradually opened, and the active force after opening is to be gradually reduced, and after there is pin cutting and opening passage portion, is made
It is firmly not enough to the case where continuing to press on slip pipe downlink, i.e. pitching slip pipe does not fully open.It will appear as slip pipe in operation field
The unconspicuous problem of pressure drop after unlatching.Circulation passage not exclusively opens also the effect that will affect subsequent fracturing work.
Utility model content
For the above-mentioned deficiency of the prior art, the utility model provides a kind of switchable pitching sliding sleeve.It is practical using this
Novel ingehious design, to achieve the purpose that pitching sliding sleeve rotarily opens, it is ensured that pitching sliding sleeve circulation passage is all turned on,
Pressure drop shows the effect for obviously greatly improving fracturing work after pitching sliding sleeve is opened.
To achieve the goals above, the technical solution of the utility model is as follows: a kind of switchable pitching sliding sleeve, including above connects
Head, shell, slip pipe, ball seat, lower contact, shear pin, one end of the shell and the connection of top connection, the other end of shell with
Lower contact connection, slip pipe connects with shell by shear pin, slip pipe and ball seat threaded connection, and shell and slip pipe offer multiple
Recirculation hole, the recirculation hole of shell and the recirculation hole of slip pipe are dislocatedly distributed, and top connection, slip pipe and lower contact are designed with for adjusting stream
The serration type structure of through-hole relative position.
Further, one end of the shell is threadedly coupled with top connection, and the other end of shell is threadedly coupled with lower contact.
Further, the serration type structure in circular ring shape be respectively arranged at slip pipe both ends and with two end in contact of slip pipe
The end face of top connection, lower contact.
Further, the serration type structure includes the first sawtooth, the second sawtooth, the first serrated slot and the second serrated slot,
First sawtooth is located at one end of slip pipe, and the second sawtooth is located at lower contact, and the first serrated slot is located at top connection, and the second serrated slot is located at
The slip pipe other end, the first sawtooth and the setting of the first serrated slot relative dislocation, are used cooperatively, rotation engagement, the second sawtooth and second
The setting of serrated slot relative dislocation, is used cooperatively, rotation engagement.
Further, the slip pipe outer surface offers accommodation groove, and the locking ring of shrinkable deformation is equipped in accommodation groove,
The inner surface of shell offers and the matching used lock slots of locking ring.
Further, the lock slots on the shell are two.
Further, the ball seat side is equipped with multiple blind holes.
Compared with prior art, the utility model has the beneficial effects that 1, achievable slip pipe fully opens, be conducive to pressure break
Operation.2, mode is rotarily opened, orifice size variation is increased, it is unobvious that ground pressure drop after slip pipe is opened is solved on tool construction
The problem of.3, because having opened up blind hole, ball seat is easier to bore mill, improves the efficiency of drilling and grinding operation.
It elaborates with reference to the accompanying drawings and detailed description to the utility model.
Detailed description of the invention
Fig. 1 is switchable pitching sliding sleeve schematic diagram in the open state.
Fig. 2 is that switchable pitching sliding sleeve is in close state schematic diagram.
Fig. 3 is circulation passage closed state schematic diagram.
Fig. 4 is circulation passage opening state schematic diagram.
When Fig. 5 is that slip pipe is contacted with lower contact, the planar development schematic diagram of serration type structure.
When Fig. 6 is slip pipe and locked lower contact, the planar development schematic diagram of serration type structure.
Wherein, 1. top connection, 2. shells, 3. slip pipes, 4. ball seats, 5. lower contacts, 6. locking rings, 7. shear pins, 8. saws
Tooth-like structure, 9a. recirculation hole, 9b. recirculation hole, 10a. lock slots, 10b. lock slots, 11. blind holes.
Specific embodiment
As shown in Fig. 1 to 2, a kind of switchable pitching sliding sleeve, including top connection 1, shell 2, slip pipe 3, ball seat 4, lower contact
5, shear pin 7, one end of shell 2 and the connection of top connection 1, the other end of shell 2 are connect with lower contact 5, slip pipe 3 and shell
2 are connected by shear pin 7, and slip pipe 3 and ball seat 4 are threadedly coupled, and shell 2 and slip pipe 3 offer multiple recirculation holes, shell
The recirculation hole 9b of recirculation hole 9a and slip pipe is dislocatedly distributed, and top connection 1, slip pipe 3 and lower contact 5 are designed with for adjusting recirculation hole phase
To the serration type structure 8 of position.
One end of shell 2 is threadedly coupled with top connection 1, and the other end of shell 2 is threadedly coupled with lower contact 5.
Serration type structure 8 in circular ring shape be respectively arranged at slip pipe 3 both ends and with the top connection 1 of 3 liang of end in contact of slip pipe, under
The end face of connector 5, circular ring shape design neither hinder the circulation of inner passage that can play the purpose for rotating slip pipe 3 again.
Serration type structure 8 includes the first sawtooth 8a, the second sawtooth 8b, the first serrated slot 8c and the second serrated slot 8d, and first
Sawtooth 8a is located at one end of slip pipe 3, and the second sawtooth 8b is located at lower contact 5, and the first serrated slot 8c is located at top connection 1, the second sawtooth
Slot 8d is located at 3 other end of slip pipe, the first sawtooth 8a and the setting of the first serrated slot 8c relative dislocation, is used cooperatively, rotation engagement, the
Two sawtooth 8b and the setting of the second serrated slot 8d relative dislocation, are used cooperatively, rotation engagement.
3 outer surface of slip pipe offers accommodation groove, and the locking ring 6 of shrinkable deformation, the material of locking ring are equipped in accommodation groove
Matter is elastic material, and the inner surface of shell 2 offers and the matching used lock slots of locking ring 6.
Lock slots on shell 2 are two, are locked out slot 10a and lock slots 10b respectively.
4 side of ball seat is equipped with multiple blind holes 11, and blind hole makes ball seat be easier to bore mill, improves the efficiency of drilling and grinding operation.
The course of work of switchable pitching sliding sleeve provided by the utility model is as follows:
Pitching sliding sleeve: pitching is opened, one fixed displacement of pumping to ball seat 4 promotes pressure after ball realizes sealing on ball seat 4
Power to shear pin 7 is sheared, 3 downlink of slip pipe.With the beginning of 3 downlink process of slip pipe, lock slots of the locking ring 6 from shell 2
In 10a deformation retract to accommodation groove, slip pipe 3 is continued traveling downwardly, until the second serrated slot 8d of slip pipe 3 and the second saw of lower contact 5
Tooth 8b is in contact, and is overlapped as shown in figure 5, the recirculation hole 9b of the recirculation hole 9a of slip pipe 3 and shell 2 is not corresponding at this time, flow channel
It being not switched on, slip pipe 3 is inside and outside to still have pressure difference, the second sawtooth 8b and the second serrated slot 8d rotation engagement, as shown in fig. 6, with
The rotation adjustment recirculation hole 9a and recirculation hole 9b of slip pipe 3 is completely coincident, as shown in figure 4, i.e. flow channel fully opens, and is locked
Determine the flexible locking in lock slots 10a of ring 6, the circulation passage opened at this time is locked, as shown in Figure 1.
It closes pitching sliding sleeve: separately offering a groove convenient for dragging slip pipe uplink on slip pipe 3, tripping in is opened with sliding sleeve
The pipe string of pass tool after the groove of sliding sleeve switch instrument and slip pipe 3 is worked good, above mentions sliding sleeve and opens to switchable pitching sliding sleeve position
Pass tool, 3 uplink of slip pipe.With the beginning of 3 uplink process of slip pipe, locking ring 6 from the lock slots 10b deformation retract of shell 2 to
In accommodation groove, the second sawtooth 8b and the second serrated slot 8d are gradually distance from, and with the uplink of slip pipe 3, circulation passage is closed, such as
Shown in Fig. 3.The continuation of slip pipe 3 is above mentioned, when reaching 1 one end of top connection, the first sawtooth 8a and the first serrated slot 8c rotation engagement,
To realize the reset of slip pipe, locking ring 6 stretches in lock slots 10b to be locked, that is, the circulation passage being closed is locked.
Claims (7)
1. switchable pitching sliding sleeve, including top connection, shell, slip pipe, ball seat, lower contact, shear pin, one end of the shell
It is connect with top connection, the other end of shell is connect with lower contact, and slip pipe is connected with shell by shear pin, slip pipe and ball seat spiral shell
Line connection, it is characterised in that: the shell and slip pipe offer multiple recirculation holes, and the recirculation hole of shell and the recirculation hole of slip pipe are wrong
Bit distribution, top connection, slip pipe and lower contact are designed with the serration type structure for adjusting recirculation hole relative position.
2. switchable pitching sliding sleeve according to claim 1, it is characterised in that: one end of the shell and top connection screw thread
Connection, the other end of shell are threadedly coupled with lower contact.
3. switchable pitching sliding sleeve according to claim 1, it is characterised in that: the serration type structure is distinguished in circular ring shape
It is set to the both ends of slip pipe and the end face with top connection, the lower contact of two end in contact of slip pipe.
4. switchable pitching sliding sleeve according to claim 1-3, it is characterised in that: the serration type structure includes
First sawtooth, the second sawtooth, the first serrated slot and the second serrated slot, the first sawtooth are located at one end of slip pipe, and the second sawtooth is located at
Lower contact, the first serrated slot are located at top connection, and the second serrated slot is located at the slip pipe other end, and the first sawtooth and the first serrated slot are opposite
It shifts to install, is used cooperatively, rotation engagement, the second sawtooth and the second serrated slot relative dislocation are arranged, and are used cooperatively, rotation is nibbled
It closes.
5. switchable pitching sliding sleeve according to claim 4, it is characterised in that: the slip pipe outer surface offers accommodating
Slot, the locking ring of shrinkable deformation is equipped in accommodation groove, and the inner surface of shell offers and the matching used locking of locking ring
Slot.
6. switchable pitching sliding sleeve according to claim 5, it is characterised in that: the lock slots on the shell are two.
7. switchable pitching sliding sleeve according to claim 1, it is characterised in that: the ball seat side is equipped with multiple blind holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820733659.1U CN208430986U (en) | 2018-05-17 | 2018-05-17 | Switchable pitching sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820733659.1U CN208430986U (en) | 2018-05-17 | 2018-05-17 | Switchable pitching sliding sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208430986U true CN208430986U (en) | 2019-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820733659.1U Expired - Fee Related CN208430986U (en) | 2018-05-17 | 2018-05-17 | Switchable pitching sliding sleeve |
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| CN (1) | CN208430986U (en) |
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