CN104533312B - Coiled tubing hydraulic centering guide - Google Patents
Coiled tubing hydraulic centering guide Download PDFInfo
- Publication number
- CN104533312B CN104533312B CN201410811743.7A CN201410811743A CN104533312B CN 104533312 B CN104533312 B CN 104533312B CN 201410811743 A CN201410811743 A CN 201410811743A CN 104533312 B CN104533312 B CN 104533312B
- Authority
- CN
- China
- Prior art keywords
- coiled tubing
- sliding sleeve
- centralizer
- adapter sleeve
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000003825 pressing Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 11
- 238000010276 construction Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 11
- 210000000078 claw Anatomy 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 11
- 229920003266 Leaf® Polymers 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000003978 infusion fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000638 stimulation Effects 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
- E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a coiled tubing hydraulic centering guide comprising a body. One side of the body is connected with an upper connector through a connecting sleeve, the other side of the body is connected with a lower connector, centering claws are arranged in the body, arched spring pieces are arranged on the centering claws, pressing boards are arranged on the spring pieces, the pressing boards are fixed on the body through screws, a sliding sleeve which controls the working state is arranged on the inner wall of the body, one end of the sliding sleeve extends into a connecting sleeve, and the other end of the sliding sleeve is contacted with the lower connector. Steps are arranged on the side, where the sliding sleeve is contacted with the lower connector, of the sliding sleeve. The steps are connected with springs through spring collars. The coiled tubing hydraulic centering guide solves the problem that an existing coiled tubing shakes continuously because the coiled tubing cannot be centered in working course, and then service life of a packer rubber barrel is affected. The structure is ingenious, stable centering effect is achieved for a construction tool in construction operation of coiled tubing, and the working efficiency is improved.
Description
Technical field
The invention belongs to oil gas field stimulation technology field is and in particular to a kind of coiled tubing hydraulic type centralizer.
Background technology
Coiled tubing can replace conventional oil pipe to carry out twenties kinds of operations, and it has small volume, flexible, automatization's journey
Degree is high, labor strength is low, duty cycle is short, efficiency high many advantages, such as.Continuous oil pipe operation equipment enables with pressure dragging
Action industry, continuously play lower tubular column, be continuously injected into, the construction operation that many routine oil pipes cannot be carried out can be carried out.
The domestic at present grasp to coiled tubing construction operation technology and equipment also lags far behind Foreign Advanced Lerel, tool
The coiled tubing construction tool having independent research level also cannot fully meet the demand of construction operation.In coiled tubing list underseal
In annular space injection volume fracturing construction, because coiled tubing itself outside dimension is less, well track out of plumb, tool string is difficult to
It is in the center of sleeve pipe, lead to tubing string in pressing crack construction process can ceaselessly shake, tool string shake can affect packer rubber
The service life of cylinder, also can produce certain impact to the construction stability of ejector and whole tubing string simultaneously, then affect
Construction operation efficiency.
Content of the invention
It is an object of the invention to provide a kind of coiled tubing hydraulic type centralizer, solve existing coiled tubing worked
The problem that oil pipe does not stop to shake is not caused between two parties in journey.
The technical solution adopted in the present invention is：A kind of coiled tubing hydraulic type centralizer, including body, the one of body
Side is connected with top connection by adapter sleeve, and the opposite side of body is connected with lower contact, and this is provided with righting pawl, on righting pawl in vivo
It is provided with the spring leaf of arch, spring leaf is provided with pressing plate, pressing plate is fixed by screws on described body, in inner body wall
It is provided with the sliding sleeve controlling working condition, one end of sliding sleeve is stretched in described adapter sleeve, and the other end of sliding sleeve is contacted with lower contact,
The side that sliding sleeve is contacted with lower contact is provided with step, and step contacts connection by check ring with spring.
The feature of the present invention also resides in：
It is fixed with the single current valve assembly for off-load in adapter sleeve.
Righting pawl is 14 × 28 °～16 × 32 ° with casing wall contact surface in each chamfering in both sides along along body axial direction.
Also include every sand ring, every the sand ring two ends end face respective end contact with top connection and adapter sleeve respectively, contact surface
Between gap width be less than 0.2mm.
Sliding sleeve and adapter sleeve contact position in axial direction and are respectively arranged with O-ring seal b in the middle part of described sliding sleeve, O-shaped
Sealing ring b and adapter sleeve junction are provided with two lines cutting seam.
It is provided with O-ring seal c on adapter sleeve outer wall axial direction.
Sliding sleeve and lower contact contact position are in axial direction provided with O-ring seal d.
Righting dog collar is evenly arranged with 3 around described body.
The invention has the beneficial effects as follows：A kind of present invention coiled tubing hydraulic type centralizer, the setting of sliding sleeve delays to be helped
The high voltage startup of positive device, in lower tubular column, centralizer does not work, and when reaching predeterminated position, centralizer is just started working；Sliding sleeve
On spring make centralizer that work can be repeated several times；After single current valve assembly ensure that oil pipe pressure release, righting pawl can successfully be retracted
This is internal, it is to avoid cause bit freezing；Righting pawl upper design becomes long trough to ensure that the support of righting pawl has on casing wall and with casing wall
Enough contacts area, to reach preferable righting effect, long trough are designed with big chamfering, and it is at collar and set
Pipe is difficult to be blocked when producing friction, makes coiled tubing centralizer cause the risk of bit freezing to greatly reduce；Setting energy every sand ring
Prevent sand enter but high pressure liquid physical ability pass through, oil pipe inner high voltage liquid can be made with 0.18mm thick molybdenum filament wire cutting thin seam out
Body passes through, but sand cannot pass through thin seam and enters righting pawl stroke intracavity.
Brief description
Fig. 1 is a kind of structural representation of present invention coiled tubing hydraulic type centralizer；
Fig. 2 is a kind of working state figure of present invention coiled tubing hydraulic type centralizer；
Fig. 3 is a kind of profile in present invention coiled tubing hydraulic type centralizer not actuated constantly sliding sleeve pressure reduction face；
Fig. 4 is the enlarged drawing at A in Fig. 3；
Fig. 5 is the structural representation of righting pawl in a kind of present invention coiled tubing hydraulic type centralizer；
Fig. 6 is the left view of Fig. 5.
In figure, 1. top connection, 2. every sand ring, 3. single current valve assembly, 4.O type sealing ring a, 5. adapter sleeve, 6.O type sealing ring
B, 7. sliding sleeve, 8. body, 9. screw, 10. pressing plate, 11. spring leafs, 12.O type sealing ring c, 13. righting pawls, 14. check rings,
15. springs, 16.O type sealing ring d, 17. lower contacts.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
Embodiment 1
A kind of structure of present invention coiled tubing hydraulic type centralizer as shown in figure 1, include body 8 and and top connection 1,
One end of body 8 is connected by adapter sleeve 5 with top connection 1, and the other end of body 8 is connected with lower contact 17, is provided with body 8
Righting pawl 13, righting pawl 13 is provided with the spring leaf 11 of arch, and spring leaf 11 is provided with pressing plate 10, and pressing plate 10 passes through screw
9 are fixed on body 8, body 8 inwall are provided with the sliding sleeve 7 controlling working condition, one end of sliding sleeve 7 is stretched in adapter sleeve 5,
The other end of sliding sleeve 7 is contacted with lower contact 17, and the side that sliding sleeve 7 is contacted with lower contact 17 is provided with step, and step passes through spring
Back-up ring 14 contacts connection with spring 15, is fixed with the single current valve assembly 3 for off-load in adapter sleeve 5, and righting pawl 13 top is length
Flute profile and have larger chamfering, bottom is cylinder, and righting pawl 13 bottom is provided with O-shaped close along body 8 radial direction both sides
Seal c12, righting pawl 13 and casing wall contact surface each chamfering in both sides along along body 8 axial direction be 14 × 28 °～16 ×
32 °, also include every sand ring 2, every the sand ring 2 two ends end face respective end contact with top connection 1 and adapter sleeve 5 respectively, contact surface
Between gap width be less than 0.2mm, sliding sleeve 7 and adapter sleeve 5 contact position are respectively arranged with axial direction and in the middle part of sliding sleeve 7
O-ring seal b6, O-ring seal b6 and adapter sleeve 5 junction are provided with two seams with the symmetrical wire cutting of molybdenum filament, and sliding sleeve 7 is stretched
O-ring seal b6 and adapter sleeve 5 formation radial seal are passed through in the one end entering adapter sleeve 5, and adapter sleeve 5 outer wall axial direction is arranged
There is O-ring seal c4, sliding sleeve 7 and lower contact 17 contact position are in axial direction provided with O-ring seal d16.
During use, as shown in figures 2-6, the choke valve instrument such as waterpower spray gun is connected on coiled tubing operating tool string, when from
During oil-line pump fluid injection body, certain chock pressure difference can be produced between oil pipe internal liquid and oil jacket annulus fluid.Coiled tubing
Connect construction tool string and design attitude in pit shaft is dropped to certain speed, coiled tubing is because of the spy of itself flexible hose
Levy, during decentralization, need in oil pipe infusion liquid to assist tubing string preferably to enter well, the chock pressure difference of generation controls
In below 5MPa, the pressure difference value that chock pressure difference now is formed at sliding sleeve 7 step surface two ends can not overcome spring 15 completely
Elastic force sliding sleeve 7 is pushed in lower contact 17, the liquid in oil pipe can not by sliding sleeve 7 upper end enter centralizer inner chamber and act on
In righting pawl 13, that is, righting pawl 13 in the case will not be to overhanging in body 8, and centralizer does not possess righting effect, pipe
Post can in sleeve pipe freely dragging.
Need to carry out normal pressure break construction operation, discharge capacity during normal construction operation after tool string is dragged to design attitude
Will be far above infusion discharge capacity during lower tubular column, now chock pressure difference is far above 5MPa, and sliding sleeve 7 is differential sliding sleeve, its step surface
The difference of two ends institute stress can overcome the elastic force of spring 15 completely, and sliding sleeve 7 slides until reaching firmly spacing into lower contact 17, this
When the displacement that produces in adapter sleeve 5 of sliding sleeve 7 upper end just make the thin seam that on adapter sleeve 5, wire cutting is formed allow oily liquid in pipe with
Centralizer inner chamber is connected, and highly pressurised liquid acts on righting pawl 13 after entering centralizer inner chamber, makes righting pawl 13 in body 8
On casing wall, the spring leaf 11 between righting pawl 13 and pressing plate 10 is crushed, and centralizer circumference has 3 pieces of rightings for protruding support
Pawl, under the huge restoring force effect of spring leaf 11, centralizer body 8 can be in the middle of sleeve pipe, and that is, centralizer is provided with
Righting effect.
When constructed one layer after, stop oil pipe infusion, wait tubing pressure drop to below 5MPa or oil jacket pressure balance
When, the pressure differential at sliding sleeve 7 step surface two ends is reduced to very little or disappearance, and sliding sleeve 7 and check ring 14 can be in the recoveries of spring 15
The lower rapid reset of power effect, righting pawl 13 also can bounce back in body 8 because of the restoring force of spring leaf 11 simultaneously, centralizer inner chamber
Liquid be squeezed and be back in oil pipe at single current valve assembly 3, now again can smoothly drag tubing string and apply to next
Work interval.Ball-and-seat total performance is the aggregation of ball-and-seat, belongs to known technology, does not just do here and describe one by one.
Embodiment 2
In the above-described embodiments, in order that righting pawl can smoothly bounce back in body 8 all the time, it is fixed with adapter sleeve 5
Single current valve assembly 3, highly pressurised liquid can only be by single current valve assembly 3 come off-load, and the effect of single current valve assembly 3 is ensuring that oil pipe is let out
After pressure, righting pawl 13 can successfully be retracted and be avoided causing bit freezing in body 8.
Embodiment 3
In the above-described embodiments, the shape of righting pawl as shown in Figures 5 and 6, its top is long trough, and bottom is cylinder
Shape, cylindrical part guarantee righting pawl 13 to overhanging and inwardly bouncing back and sealing function in body 8, protect by long trough part
Card righting pawl 13 supports on casing wall and has enough contacts area to reach preferable righting effect with casing wall.Righting pawl 13
With casing wall contact surface in 15 × 30 ° of each chamfering in both sides along along body 8 axial direction, sleeve pipe passes through section hoop with sleeve pipe and is connected,
Junction can form a circle annulus, when coiled tubing centralizer moves back and forth in sleeve pipe, even if righting pawl 13 fails
Be fully retracted to body 8, also be difficult to when righting pawl 13 is by section hoop can by section bind round in oil pipe end face withstand and make continuous oil
Pipe centralizer is stuck at section hoop position.Righting pawl 13 upper design becomes long trough and has big chamfering, its at collar with
Sleeve pipe is difficult to be blocked when producing friction, and that is, coiled tubing centralizer causes the risk of bit freezing to greatly reduce.
Embodiment 4
In the above-described embodiments, in order to prevent sand from entering in centralizer body 8, body 8 is provided with every sand ring 2,
Every the sand ring 2 two ends end face respective end contact with top connection 1 and adapter sleeve 5 respectively, the gap width between contact surface is less than
0.2mm, can prevent sand from entering but high pressure liquid physical ability is passed through.
Embodiment 5
In the above-described embodiments, in order that centralizer has better seal effect, therefore in described sliding sleeve 7 and adapter sleeve 5
Contact position in axial direction and is respectively arranged with O-ring seal b6 in the middle part of described sliding sleeve 7, described O-ring seal b6 be connected
Cover 5 junctions and be provided with two seams, when sliding sleeve 7 is not opened, rely on the sealing function of O-ring seal b6, liquid is with sand all not
Righting pawl stroke intracavity can be entered, when sliding sleeve 7 is opened after chock pressure difference because reaching, sliding sleeve 7 still can not fully slide out connection
Outside set 5, its periphery is coordinated still in less gap with adapter sleeve 5, and the front end sliding sleeve 7 of adapter sleeve 5 stretches into part to be had
0.18mm thick molybdenum filament wire cutting thin seam out, after sliding sleeve 7 fully opens, oil pipe inner high voltage liquid can enter righting by thin seam
Pawl 13 stroke intracavity struts righting pawl, but sand cannot pass through thin seam and enters righting pawl 13 stroke intracavity.
In the above-described embodiments, in order that righting pawl 13 can play good righting effect, so around described body 8
It is evenly arranged with 3 righting pawls 13.
The only illustration to the present invention exemplified as above, does not constitute the restriction to protection scope of the present invention, all
It is that same or analogous design belongs within protection scope of the present invention with the present invention.
A kind of present invention coiled tubing hydraulic type centralizer, solves existing coiled tubing and does not make between two parties in the course of the work
Become oil pipe not stop to shake, and then affect the problem of the service life of packing element, 3 righting pawls being uniformly arranged around body
Support makes coiled tubing placed in the middle on jacket wall, and top is long trough, and it is enough that the righting pawl that bottom is cylindrical makes itself and jacket wall have
Contact area, and reduce the risk of bit freezing, unique spring design enable centralizer after power cut-off righting pawl and
Shi Fuwei, enables centralizer to repeatedly use.This coiled tubing hydraulic type centralizer structure is exquisite, applies in coiled tubing
In work industry, stable righting effect is played to construction tool, improve work efficiency.
Claims (7)
1. a kind of coiled tubing hydraulic type centralizer is it is characterised in that include body (8) and top connection (1), described body (8)
One end be connected by adapter sleeve (5) with top connection (1), the other end of body (8) is connected with lower contact (17), also includes
Righting pawl (13), around described body (8) circumferentially around setting, described righting pawl (13) top is long trough to righting pawl (13)
And there is chamfering, bottom is cylinder, and described righting pawl (13) bottom and described body (8) contact position are provided with O-shaped close
Seal c (12), described righting pawl (13) is provided with the spring leaf (11) of arch, and spring leaf is provided with pressing plate on (11)
(10), pressing plate (10) is connected by screw (9) with described body (8), and described body (8) inwall is provided with sliding sleeve (7),
One end of sliding sleeve (7) is stretched in described adapter sleeve (5), and the other end of sliding sleeve (7) contacts and is provided with lower contact (17)
Step, described step is contacted with spring (15) by check ring (14).
2. a kind of coiled tubing hydraulic type centralizer as described in claim 1 is it is characterised in that described adapter sleeve (5) is interior
It is fixed with the single current valve assembly (3) for off-load.
3. a kind of coiled tubing hydraulic type centralizer as described in claim 1 is it is characterised in that also include every sand ring (2),
Every sand ring (2) the two ends end face respective end contact with top connection (1) and adapter sleeve (5) respectively, the gap between contact surface
Width is less than 0.2mm.
4. a kind of coiled tubing hydraulic type centralizer as described in claim 1 it is characterised in that described sliding sleeve (7) with even
Female connector (5) contact position is respectively arranged with O type sealing ring b (6), described O type in axial direction and in the middle part of described sliding sleeve (7)
Sealing ring b (6) and adapter sleeve (5) junction are provided with two seams.
5. a kind of coiled tubing hydraulic type centralizer as described in claim 1 it is characterised in that described adapter sleeve (5) outward
O type sealing ring a (4) is provided with wall axial direction.
6. a kind of coiled tubing hydraulic type centralizer as described in claim 1 it is characterised in that described sliding sleeve (7) with
Joint (17) contact position is in axial direction provided with O type sealing ring d (16).
7. a kind of coiled tubing hydraulic type centralizer as described in claim 1 is it is characterised in that described righting pawl (13) ring
It is evenly arranged with 3 around described body (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410811743.7A CN104533312B (en) | 2014-12-22 | 2014-12-22 | Coiled tubing hydraulic centering guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410811743.7A CN104533312B (en) | 2014-12-22 | 2014-12-22 | Coiled tubing hydraulic centering guide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104533312A CN104533312A (en) | 2015-04-22 |
| CN104533312B true CN104533312B (en) | 2017-02-22 |
Family
ID=52848913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410811743.7A Active CN104533312B (en) | 2014-12-22 | 2014-12-22 | Coiled tubing hydraulic centering guide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104533312B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2444060A (en) * | 2006-11-21 | 2008-05-28 | Swelltec Ltd | Swellable downhole apparatus |
| CN201517377U (en) * | 2009-11-07 | 2010-06-30 | 蔺亚 | Centralizer of rod part of sucker rod |
| CN204419066U (en) * | 2014-12-22 | 2015-06-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of coiled tubing hydraulic type centralizer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8622153B2 (en) * | 2007-09-04 | 2014-01-07 | Stephen John McLoughlin | Downhole assembly |
-
2014
- 2014-12-22 CN CN201410811743.7A patent/CN104533312B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2444060A (en) * | 2006-11-21 | 2008-05-28 | Swelltec Ltd | Swellable downhole apparatus |
| CN201517377U (en) * | 2009-11-07 | 2010-06-30 | 蔺亚 | Centralizer of rod part of sucker rod |
| CN204419066U (en) * | 2014-12-22 | 2015-06-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of coiled tubing hydraulic type centralizer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104533312A (en) | 2015-04-22 |
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Effective date of registration: 20201027 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1207 Patentee before: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING COMPANY LIMITED CHANGQING DOWNHOLE TECHNOLOGY Co. |