CN104405334B - Stage cementer - Google Patents
Stage cementer Download PDFInfo
- Publication number
- CN104405334B CN104405334B CN201410601090.XA CN201410601090A CN104405334B CN 104405334 B CN104405334 B CN 104405334B CN 201410601090 A CN201410601090 A CN 201410601090A CN 104405334 B CN104405334 B CN 104405334B
- Authority
- CN
- China
- Prior art keywords
- borehole jack
- inner sleeve
- perforate
- conical surface
- cementing device
- 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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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention provides a stage cementer. The stage cementer comprises a body, a hole closing sleeve and a hole opening sleeve, wherein the lower end of the body is connected with a lower inner sleeve; the body is provided with a plurality of circulation holes along the circumferential direction; the hole closing sleeve is connected into the body through a first shear pin in a penetrating manner and is positioned above the plural circulation holes; the inner side of the upper end of the hole closing sleeve is connected with an inner core in the penetrating manner; the hole opening sleeve is arranged in the body in the penetrating manner; the upper end of the hole opening sleeve is in hermetical contact with the lower end of the hole closing sleeve, and the lower end of the hole opening sleeve is connected to the lower inner sleeve through a second shear pin. According to the stage cementer, hole opening or hole closing of the stage cementer can be safely and smoothly realized, and smooth cementing operation is guaranteed; the stage cementer has a simple structure and is easy to machine, the production and manufacturing cost is reduced, and the field use is convenient.
Description
Technical field
The present invention is related to a kind of cementing device, more particularly to application in a kind of petroleum natural gas exploration field
Stage cementing device.
Background technology
In petroleum natural gas exploration field, fraclional well cementing can be effectively improved cementing quality, reduces and is drilled well operations
Risk.At present, the stage cementing device used in completion construction needs twice throwing plug in tubing string to build the pressure mostly
Cementing well operation, this stage cementing device structure is complicated, complex operation, and instrument overall length is long,
Production and processing cost is high, and machining accuracy is difficult to ensure that.
Therefore, it is necessary to provide a kind of new stage cementing device, overcome drawbacks described above.
Summary of the invention
It is an object of the invention to provide a kind of stage cementing device, can safely and smoothly realize the perforate of stage cementing device
Or hole, pass, it is ensured that being smoothed out of well cementing operation, its simple in construction, be prone to processing, reduce manufacturing cost,
Onsite application is convenient.
The above-mentioned purpose of the present invention can use following technical proposal to realize:
The present invention provides a kind of stage cementing device, and described stage cementing device includes:
Body, its lower end connects lower inner sleeve, and described body along the circumferential direction offers multiple circulation port；
Close borehole jack, its wear by the first shear pin be connected to described internal, described in described pass borehole jack is positioned at
The top of multiple circulation ports, wearing connection inside the upper end of described pass borehole jack has inner core；
Perforate set, its be located in described internal, the lower end of upper end and the described pass borehole jack of described perforate set seals
Contact, described perforate set lower end by the second shear pin be connected to described lower in put；
Wherein, the upper end outer wall of described lower inner sleeve is formed with the outer self-locking conical surface, and the lower end inside of described pass borehole jack is formed
Hole, the pass conical surface matched with the described outer self-locking conical surface；The lower end outside of described perforate set is formed with the perforate conical surface, described
The interior self-locking conical surface matched with the described perforate conical surface it is formed with inside the upper end of lower inner sleeve.
In a preferred embodiment, the upper surface of described inner core along the circumferential direction offers multiple groove.
In a preferred embodiment, the outside of described circulation port is provided with gasket seal.
In a preferred embodiment, it is connected between described lower inner sleeve and described body and has stopping screw.
In a preferred embodiment, between described body and described pass borehole jack, described perforate set and described pass borehole jack it
Between, described perforate set with described lower inner sleeve between and the upper end of described lower inner sleeve outside be equipped with sealing ring and back-up ring.
Feature and the advantage of the stage cementing device of the present invention be: this stage cementing device can safely and smoothly realize perforate
With pass hole operation, it is ensured that being smoothed out of well cementing operation, Guan Konghou is by the outer self-locking conical surface of lower inner sleeve and pass borehole jack
The self-locking that coordinates closing the hole conical surface ensure that the permanent of pass hole operation；It addition, this stage cementing device, simple in construction,
Be prone to processing, easy to use, reduce manufacturing cost；The perforate set top of the present invention is built in borehole jack bottom, pass,
Make stroke during perforate set perforate overlapping with stroke when closing hole, borehole jack pass, thus shorten the entirety of stage cementing device
Length, has reached to reduce the purpose of cost.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below required for make
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention,
For those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is the front view of the stage cementing device of the present invention.
Fig. 2 is the state diagram that the stage cementing device perforate set of the present invention is opened.
Fig. 3 is the state diagram of the stage cementing device pass borehole jack closedown circulation port of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.
Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
Every other embodiment, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, the present invention provides a kind of stage cementing device, it includes body 1, closes borehole jack 2 and perforate set
3, wherein: the lower end of body 1 connects lower inner sleeve 4, and described body 1 along the circumferential direction offers multiple circulation
Hole 11；Closing borehole jack 2 to be worn by the first shear pin 21 and be connected in described body 1, described pass borehole jack 2 is positioned at
The top of the plurality of circulation port 11, wearing connection inside the upper end of described pass borehole jack 2 has inner core 5；Perforate set 3
Being located in described body 1, the lower end of upper end and the described pass borehole jack 2 of described perforate set 3 is in sealing contact, described in open
The lower end of borehole jack 3 is connected in described lower inner sleeve 4 by the second shear pin 31.
Specifically, body 1 is substantially in cylinder barrel shaped, and its lower end inside is threaded a lower inner sleeve 4, in the present invention,
Can be connected between lower inner sleeve 4 and body 1 and have stopping screw 41, the middle part of body 1 along the circumferential direction offers multiple
Circulation port 11, in the present embodiment, body 1 the most uniformly offers six circulation ports 11, each follows
The outside of annular distance 11 is equipped with gasket seal 111, before this gasket seal 111 is used for preventing stage cementing device cementing,
Mud particles or dust granules in well fall in stage cementing device through circulation port 11.
Close borehole jack 2 substantially in cylinder barrel shaped, in it is located in body 1 and be positioned at the top of multiple circulation port 11, should
Close borehole jack 2 to be connected on body 1 by the first shear pin 21, when the first shear pin 21 is cut off,
Close borehole jack 2 and axially move down the multiple circulation ports 11 closed on body 1, in the present invention, the upper end of lower inner sleeve 4 with
Ring groove 42 it is formed with between body 1, when closing borehole jack 2 and closing multiple circulation ports 11 on body 1,
The lower end closing borehole jack 2 is inserted in this ring groove 42, and contacts with the upper end outer side seal of lower inner sleeve 4.In this enforcement
In example, the lateral wall closing borehole jack 2 offers flow channel for liquids groove (not shown), when it can make pass borehole jack 2 close hole,
The lower end closing borehole jack 2 can successfully fall in ring groove 42, prevents from forming dead space, causes closing borehole jack 2 and falls not
Situation occurs smoothly.
Inner core 5 is substantially in oblate tubular, and it is threaded in inside the upper end closing borehole jack 2, in the present invention, interior
The upper surface of core 5 along the circumferential direction offers multiple groove 51.
Perforate set 3, substantially in cylinder barrel shaped, is connected to down in it is located in body 1 and by the second shear pin 31
Inside the upper end of inner sleeve 4, it is in sealing contact with the lower end inside closing borehole jack 2 outside the upper end of perforate set 3, thus closes hole
The lower end of set 2, perforate set 3 form a sealing structure, by multiple circulation ports of body 1 with the upper end of lower inner sleeve 4
11 keep apart with the centre bore 12 of the stage cementing device of the present invention, and the two is not attached to lead to.
The use process of this stage cementing device is as follows: first, is connected to by stage cementing device on solid completion tubular string,
By design requirement down to precalculated position, from well head cementing, the centre bore 12 of the classified cementing device of cement injects well
The end；After completing one-level cementing job, building the pressure pipe string, highly pressurised liquid forms pressure differential on perforate set 3
And the second shear pin 31 is cut off, make perforate set 3 move down the multiple circulation ports 11 opening body 1, such as figure
Shown in 2, thus realizing recementing operation, cement, when circulation port 11 injects into well, will be washed open to be arranged on and follow
Gasket seal 111 outside annular distance 11；When after the recementing end of job, in order to prevent cement mortar from returning, need
Carry out closing hole operation, be now pressed into shut-off plug 6 on ground, when shut-off plug 6 walks to inner core 5, build the pressure, make
Shut-off plug 6 promotes inner core 5, thus promotes pass borehole jack 2 and cut off the first shear pin 21, closes borehole jack 2 and has come downwards to
Fully closed hole, as it is shown on figure 3, in the present invention, the lower end of shut-off plug 6 is provided with multiple multiple with inner core 5 upper surface
The protuberance that groove 51 coordinates, it can effectively prevent follow-up brill except the rotation of inner core 5 during shut-off plug 6；After closing hole pressure release,
In the present invention, the upper end outer wall of lower inner sleeve 4 is formed with the outer self-locking conical surface 43, and the lower end inside closing borehole jack 2 is formed
There is hole, the pass conical surface 22 matched with the outer self-locking conical surface 43, close borehole jack 2 by closing the hole conical surface 22 and the outer self-locking conical surface
The conical surface self-locking stopping function of 43, it is achieved permanent pass hole operation, thus ensure that the trouble-free operation of well cementing operation.
The stage cementing device of the present invention, can safely and smoothly realize perforate and close hole operation, it is ensured that well cementing operation suitable
Profit is carried out, Guan Konghou by the outer self-locking conical surface 43 of lower inner sleeve 4 with close borehole jack 2 close the hole conical surface 22 coordinate self-locking
Ensure that and close the permanent of hole operation；It addition, this stage cementing device, simple in construction, it is prone to processing, easy to use,
Reduce manufacturing cost；The perforate of the present invention is overlapped 3 tops and is built in borehole jack 2 bottom, pass, makes perforate overlap 3 perforates
Time stroke overlapping with the stroke closed when borehole jack 2 closes hole, thus shorten the entire length of stage cementing device, reach
Reduce the purpose of cost.
Further, the lower end outside of described perforate set 2 is formed with the perforate conical surface 23, the upper end of described lower inner sleeve 4
Inner side is formed with the interior self-locking conical surface 44 matched with the described perforate conical surface 23.This perforate conical surface 23 is bored with interior self-locking
The design in face 44, when perforate set 3 can be made to open multiple circulation port 11 and contact with lower inner sleeve 4, effectively prevents follow-up
Bore except the axial-rotation of perforate set 3 during shut-off plug 6.
According to an embodiment of the invention, between described body 1 and described pass borehole jack 2, described perforate set 3
And between described pass borehole jack 2, between described perforate set 3 and described lower inner sleeve 4 and outside the upper end of described lower inner sleeve 4
Side is equipped with sealing ring 7 and back-up ring 8.This sealing ring 7 and back-up ring 8 for seal body 1 and close between borehole jack 2,
Perforate set 3 and close between borehole jack 2, gap between perforate set 3 and lower inner sleeve 4, and closing borehole jack 2, to insert ring recessed
After in groove 42, close the gap between borehole jack 2 and lower inner sleeve 4, thus improve the close of the stage cementing device of the present invention
Sealing property.
The foregoing is only several embodiments of the present invention, those skilled in the art is according to application documents disclosure
The embodiment of the present invention can be carried out various change or modification without departing from the spirit and scope of the present invention.
Claims (5)
1. a stage cementing device, it is characterised in that described stage cementing device includes:
Body, its lower end connects lower inner sleeve, and described body along the circumferential direction offers multiple circulation port；
Close borehole jack, its wear by the first shear pin be connected to described internal, described in described pass borehole jack is positioned at
The top of multiple circulation ports, wearing connection inside the upper end of described pass borehole jack has inner core；
Perforate set, its be located in described internal, the lower end of upper end and the described pass borehole jack of described perforate set seals
Contact, described perforate set lower end by the second shear pin be connected to described lower in put；
Wherein, the upper end outer wall of described lower inner sleeve is formed with the outer self-locking conical surface, and the lower end inside of described pass borehole jack is formed
Hole, the pass conical surface matched with the described outer self-locking conical surface；The lower end outside of described perforate set is formed with the perforate conical surface, described
The interior self-locking conical surface matched with the described perforate conical surface it is formed with inside the upper end of lower inner sleeve.
2. stage cementing device as claimed in claim 1, it is characterised in that the upper surface of described inner core is circumferentially
Direction offers multiple groove.
3. stage cementing device as claimed in claim 1, it is characterised in that the outside of described circulation port is provided with close
Gasket.
4. stage cementing device as claimed in claim 1, it is characterised in that described lower inner sleeve and described body it
Between connect have stopping screw.
5. stage cementing device as claimed in claim 1, it is characterised in that described body and described pass borehole jack it
Between, between described perforate set and described pass borehole jack, between described perforate set and described lower inner sleeve and described lower inner sleeve
Sealing ring and back-up ring it is equipped with outside upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410601090.XA CN104405334B (en) | 2014-10-30 | 2014-10-30 | Stage cementer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410601090.XA CN104405334B (en) | 2014-10-30 | 2014-10-30 | Stage cementer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104405334A CN104405334A (en) | 2015-03-11 |
| CN104405334B true CN104405334B (en) | 2017-01-11 |
Family
ID=52642991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410601090.XA Active CN104405334B (en) | 2014-10-30 | 2014-10-30 | Stage cementer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405334B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227943B (en) * | 2017-07-21 | 2023-07-28 | 中国石油天然气集团有限公司 | Tieback insertion cementing assembly |
| CN109779566A (en) * | 2019-01-08 | 2019-05-21 | 青岛海蚨奥工贸有限公司 | One kind can bore sizing collar |
| CN114075944B (en) * | 2020-08-14 | 2024-03-08 | 中国石油化工股份有限公司 | Device and method for closing circulation hole of stage cementing device |
| CN114427373B (en) * | 2020-09-16 | 2024-02-09 | 中国石油化工股份有限公司 | Open plug for stage cementing device and stage cementing device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201428426Y (en) * | 2009-05-30 | 2010-03-24 | 中国石油集团西部钻探工程有限公司克拉玛依钻井工艺研究院 | Rubber plug assembly |
| CN201439701U (en) * | 2009-06-26 | 2010-04-21 | 大港油田集团有限责任公司 | Stage cementing distributor |
| US8800655B1 (en) * | 2010-02-01 | 2014-08-12 | Michael E. Bailey | Stage cementing tool |
| CN202381033U (en) * | 2011-11-25 | 2012-08-15 | 中国石油天然气股份有限公司 | Snubbing cement squeezing type tubing plug |
| CN202850939U (en) * | 2012-10-14 | 2013-04-03 | 天津德瑞克石油工具有限公司 | Novel classification cement injector of sealing device |
| CN202850941U (en) * | 2012-10-21 | 2013-04-03 | 中国石油集团西部钻探工程有限公司 | Drilling-free-type grading cementing device |
| CN204175238U (en) * | 2014-10-30 | 2015-02-25 | 中国石油天然气集团公司 | Stage cementing device |
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2014
- 2014-10-30 CN CN201410601090.XA patent/CN104405334B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104405334A (en) | 2015-03-11 |
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