CN108035694A - A kind of cement retainer - Google Patents
A kind of cement retainer Download PDFInfo
- Publication number
- CN108035694A CN108035694A CN201810004098.6A CN201810004098A CN108035694A CN 108035694 A CN108035694 A CN 108035694A CN 201810004098 A CN201810004098 A CN 201810004098A CN 108035694 A CN108035694 A CN 108035694A
- Authority
- CN
- China
- Prior art keywords
- liquid pass
- pass hole
- lower contact
- central tube
- cement retainer
- 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.)
- Granted
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- 239000004568 cement Substances 0.000 title claims abstract description 86
- 239000007788 liquid Substances 0.000 claims abstract description 85
- 230000000712 assembly Effects 0.000 claims abstract description 53
- 238000000429 assembly Methods 0.000 claims abstract description 53
- 238000012856 packing Methods 0.000 claims abstract description 34
- 238000003780 insertion Methods 0.000 claims abstract description 24
- 230000037431 insertion Effects 0.000 claims abstract description 24
- 241000239290 Araneae Species 0.000 claims description 10
- 239000007769 metal material Substances 0.000 claims description 7
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 239000013536 elastomeric material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 25
- 239000011083 cement mortar Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 201000011180 Dental Pulp Calcification Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013396 workstream Methods 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
Landscapes
- 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)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to downhole tool technical field, and in particular to a kind of cement retainer.Cement retainer provided by the invention, including the first slip assemblies, central tube, lower contact, the first centrum sleeve, packing element and inner sliding sleeve, it can be matched with conventional setting tool, cement retainer is connected by adapter with setting tool and transfers to designated position, is then set by setting tool；Completion is set at the predetermined setting depth that rear cement retainer is fixed in pit shaft, the supporting insertion tube of tripping in, promote inner sliding sleeve to connect the 3rd liquid pass hole and the first liquid pass hole, the second liquid pass hole, cement is then injected to pit shaft by above three liquid pass hole, completes the closure operation to high pressure water layer；After completing to block operation, insertion tube is extracted, insertion tube drives inner sliding sleeve to move during exiting, and the connection of inner sliding sleeve movement the first liquid pass hole of cut-out and the 3rd liquid pass hole, can be effectively prevented from the problem of liquid refluence occur.
Description
Technical field
The present invention relates to downhole tool technical field, and in particular to a kind of cement retainer.
Background technology
Since oil-well cement returns the perforation of high above casing corrosion, well cementing of cement section is leaked, made Middle-late Development Stages of Oil Fields In Other Countries
Oil reservoir flows into pit shaft adjacent to the water flooding of high pressure water layer, or oil reservoir energy declines neighbouring high pressure water layer and oil reservoir and mutually alters and cause oil well
Aqueous or reservoir water flooding, exceptional hardship is brought to oil field development.Some old well of production for many years at present, long-term High water cut, place
In closing well state, analysis judges：First, cause oil-reservoir water by long-term exploitation, the perforation of potential oil zone casing corrosion, casing leakage
Flood；Second, the long-term high pressure water injection of possible high-pressure water injection well, forms head cone with the well oil reservoir and in turn results in reservoir water flooding.Third, can
Can have high pressure water layer mutually to be altered with oil reservoir near oil reservoir causes reservoir water flooding.These wells are looked for by packer and are omitted in printing except casing
The possibility of corrosion failure leakage.Using radioisotope logging, find there is one mutually to be altered with oil reservoir adjacent to high pressure water layer in oil reservoir lower part, make
The well all produces water.
In this case, conventional processing method is first to penetrate out engineering hole in high pressure water layer, then high pressure water layer is carried out
Chemical plugging --- mainly cement mortar closure.Cement plug is bored again after having blocked and is opened, then recovers the exploitation of oil reservoir.But should
The production oil reservoir of well is on high pressure water layer and adjacent close, is not only carried using conventional method for blocking in engineering construction
Very big risk, and it is difficult to ensure that oil reservoir is not blocked by cement mortar, particularly high pressure water layer is squeezed stifled, it is possible to occur high
The outer guttation mud of water layer is pressed, makes to squeeze stifled failure.So only separated oil reservoir and high pressure water layer adjacent with it using tripping in instrument,
High pressure water layer is blocked again.
Cement retainer has been used many years, and traditional cement retainer uses metal material, by drilling rod or
Oil pipe G.I.H, although conventional cement retainer good airproof performance, resistance to pressure difference is high, Sealing period length, can also milling,
Liquid refluence is easy to cause at work, and then damages equipment；Meanwhile metal material, after mill is bored, bulk residues thing is possible to
Pit shaft is blocked, causes unnecessary loss.
The content of the invention
(1) technical problems to be solved by the invention are：Existing cement retainer is easy to cause liquid and falls at work
Stream, and then damage equipment；After cement retainer bores mill at the same time, bulk residues thing is possible to block pit shaft, causes unnecessary damage
Lose.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of cement retainer, including the first slip assemblies, center
Pipe, lower contact, the first centrum sleeve, packing element and inner sliding sleeve, the central tube and the lower contact are tubular structure, in described
Heart pipe is internally formed the first hollow cavity of both ends open, and the second hollow cavity of one end open, institute are formed in the lower contact
The one end for stating central tube is inserted into the second hollow cavity of the lower contact, and the 3rd hollow cavity, institute are formed in the inner sliding sleeve
Inner sliding sleeve is stated to be located in first hollow cavity, the central tube is equipped with the first liquid pass hole, the lower contact be equipped with
Second liquid pass hole of the first liquid pass hole connection, the inner sliding sleeve are equipped with the 3rd mistake connected with the 3rd hollow cavity
Fluid apertures, the inner sliding sleeve are slided in first hollow cavity to connect the first liquid pass hole and the 3rd liquid pass hole, or cut-out the
The connection of one liquid pass hole and the 3rd liquid pass hole；
The outer wall of the central tube other end is equipped with limiting section, is connect on the outside of the central tube along the limiting section under
The direction of head is arranged with the first slip assemblies, the first centrum sleeve and packing element successively；
First slip assemblies connect with the limiting section, and the packing element connects with the lower contact, first card
Watt wedge shaped shape of component, the first cone sleeve are equipped with the first inclined-plane coordinated with first slip assemblies, and described first
Inclined-plane tilts from inside to outside along the limiting section to the direction of the packing element.
Beneficial effects of the present invention：The present invention provides a kind of cement retainer, including the first slip assemblies, central tube, under
Connector, the first centrum sleeve, packing element and inner sliding sleeve, can match with conventional setting tool, cement retainer be passed through suitable
Orchestration is connected with setting tool, and cement retainer transfers to designated position by instruments such as cable, oil pipe, steel wires, then passes through
Setting tool is set；Completion is set at the predetermined setting depth that rear cement retainer is fixed in pit shaft, and tripping in is supporting
Insertion tube, insertion tube enter in the first hollow cavity in central tube, are inserted into inner sliding sleeve, promote inner sliding sleeve movement, make
The 3rd liquid pass hole on inner sliding sleeve connects to form path with the first liquid pass hole, the second liquid pass hole, so that by insertion tube to the 3rd
Injection cement, cement flow out to cement retainer by the 3rd liquid pass hole, the first liquid pass hole and the second liquid pass hole in hollow cavity
Outside enter pit shaft in, and then in pit shaft positioned at cement retainer downside formed a cement mortar plugged zone, complete pair
The closure operation of high pressure water layer；After completing to block operation, insertion tube is extracted, insertion tube drives inner sliding sleeve to move during exiting
Dynamic, the connection of inner sliding sleeve movement first liquid pass hole of cut-out and the 3rd liquid pass hole, this makes it possible to effectively prevent in pit shaft
Liquid or cement are returned in this cement retainer by the second liquid pass hole, the first liquid pass hole and the 3rd liquid pass hole, and inside is formed
Blind plugging, has carried out pit shaft comprehensive closure, and the cement of cement retainer lower part will be blocked under cement retainer, can
It is effectively prevented from the problem of liquid refluence occur, protects the normal operation of equipment.
Further, the cement retainer further includes throw-out collar, and the throw-out collar is socketed in the outside wall surface of the central tube,
First slip assemblies are connected by the throw-out collar with the limiting section.
Further, the cement retainer further includes the second slip assemblies and the second centrum sleeve, second slips
Component and the second centrum sleeve are socketed in the outside wall surface of the central tube successively by the packing element to the direction of the lower contact,
The packing element is connected by second slip assemblies and the second centrum sleeve with the lower contact, and second slip assemblies are in
Wedge shape, the second cone sleeve are equipped with the second inclined-plane coordinated with second slip assemblies, second inclined-plane edge
The direction ecto-entad of the packing element to the lower contact tilts.
Further, first slip assemblies and the second slip assemblies include slip spider and slips tooth, the slips
Cover for seat is connected on the outside of the central tube, and the slips tooth is fixed at the outer surface of the slip spider.
Further, the inner sliding sleeve includes connected linkage section and locking section, and the internal diameter of the locking section is more than described
The internal diameter of linkage section
Close to the lower contact and cylindrical, the 3rd liquid pass hole is arranged on the linkage section linkage section,
The 3rd hollow cavity of both ends open is formed in the cylindric linkage section；
The locking section includes the locking jaw of multiple strips made of elastic material, one end of multiple locking jaws
It is connected respectively with one end of the linkage section and forms the columned locking section, and is formed between the two neighboring locking jaw
Gap, the other end of each locking jaw are equipped with the protuberance protruded laterally, a ring on the inner wall of the central tube
The mounting groove of shape, in the mounting groove, the mounting groove is equipped with and is oriented to the protruding parts close to one end of the lower contact
Inclined-plane, direction ecto-entad of the guiding surface along central tube to lower contact tilt.
Further, quarter butt being equipped with second hollow cavity, the end of the central tube is resisted against on the short tube,
When the one end of the linkage section away from locking section is resisted against on the quarter butt, the first liquid pass hole and the 3rd the liquid pass hole connection.
Further, the slips tooth is made of cast iron materials, and the packing element is made of elastomeric material, the central tube and
The inner sliding sleeve is made of aluminium, and the first centrum sleeve, the second centrum sleeve, throw-out collar and the lower contact are by soluble metal
Material is made.
Brief description of the drawings
The advantages of above-mentioned and/or additional aspect of the invention, will be apparent in the description from combination accompanying drawings below to embodiment
Be readily appreciated that, wherein：
Fig. 1 is structure diagram of the cement retainer in the case where inner sliding sleeve is closed described in the embodiment of the present invention；
Fig. 2 is that the cement retainer described in the embodiment of the present invention is in the structure diagram under open mode in inner sliding sleeve.
Correspondence in wherein Fig. 1 and Fig. 2 between reference numeral and component names is：
1st, cement retainer, 11, central tube, the 111, first hollow cavity, the 112, first liquid pass hole, 113, limiting section,
114th, mounting groove, the 12, first slip assemblies, the 13, second slip assemblies 14, the first centrum sleeve, the 15, second centrum sleeve, 16,
Throw-out collar, 17, packing element, 18, inner sliding sleeve, 181, linkage section, the 182, the 3rd hollow cavity, 183, locking jaw, the 184, the 3rd liquid pass hole,
19th, lower contact, the 191, second hollow cavity, the 192, second liquid pass hole, 193, quarter butt.
Embodiment
It is to better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the case where there is no conflict, the implementation of the application
Feature in example and embodiment can be mutually combined.
As depicted in figs. 1 and 2, the present invention provides a kind of cement retainer 1, including the first slip assemblies 12, central tube 11,
Lower contact 19, the second centrum sleeve 15, packing element 17 and inner sliding sleeve 18, the central tube 11 and the lower contact 19 are tubulose knot
Structure, the central tube 11 are internally formed the first hollow cavity 111 of both ends open, one end open are formed in the lower contact 19
Second hollow cavity 191, one end of the central tube 11 are inserted into the second hollow cavity 191 of the lower contact 19, described interior
The 3rd hollow cavity 182 is formed in sliding sleeve 18, the inner sliding sleeve 18 is located in first hollow cavity 111, the central tube
11 are equipped with the first liquid pass hole 112, and the lower contact 19 is equipped with the second liquid pass hole connected with first liquid pass hole 112
192, the inner sliding sleeve 18 is equipped with the 3rd liquid pass hole 184 connected with the 3rd hollow cavity 182, and the inner sliding sleeve 18 exists
Slided in first hollow cavity 111 to connect the first liquid pass hole 112 and the 3rd liquid pass hole 184, or the first liquid pass hole of cut-out
112 and the 3rd liquid pass hole 184 connection；The outer wall of 11 other end of central tube is equipped with limiting section 113, in the central tube
11 outsides are arranged with the first slip assemblies 12, the second centrum sleeve 15 successively along the limiting section 113 to the direction of lower contact 19
With packing element 17；First slip assemblies 12 connect with the limiting section 113, and the packing element 17 connects with the lower contact 19,
First slip assemblies, the 12 wedge shaped shape, the first cone sleeve are equipped with first coordinated with first slip assemblies 12
Inclined-plane, first inclined-plane tilt from inside to outside along the direction of the limiting section 113 to the packing element 17.
Cement retainer 1 provided by the invention can be matched with conventional setting tool, cement retainer 1 be passed through suitable
Orchestration is connected with setting tool, and cement retainer 1 transfers to designated position by instruments such as cable, oil pipe, steel wires, then passes through
Setting tool is set；Completion is set at the predetermined setting depth that rear cement retainer 1 is fixed in pit shaft, and tripping in is supporting
Insertion tube, insertion tube enter in the first hollow cavity 111 in central tube 11, are inserted into inner sliding sleeve 18, promote inner sliding sleeve
18 movements, make the 3rd liquid pass hole 184 on inner sliding sleeve 18 connect with the first liquid pass hole 112, the second liquid pass hole 192 and to form path,
So as to inject cement into the 3rd hollow cavity 182 by insertion tube, cement passes through the 3rd liquid pass hole 184, the first liquid pass hole 112
The outside that cement retainer 1 is flowed out to the second liquid pass hole 192 enters in pit shaft, and then is located at cement retainer 1 in pit shaft
Downside formed a cement mortar plugged zone, complete the closure operation to high pressure water layer；After completing to block operation, insertion is extracted
Pipe, insertion tube drive inner sliding sleeve 18 to move during exiting, the movement of inner sliding sleeve 18 first liquid pass hole 112 and the 3rd of cut-out
The connection of liquid pass hole 184, this makes it possible to the liquid or cement effectively prevented in pit shaft to pass through the second liquid pass hole 192, the first mistake
112 and the 3rd liquid pass hole 184 of fluid apertures is returned in this cement retainer 1, and inside forms blind plugging, and comprehensive envelope has been carried out to pit shaft
Stifled, the cement of 1 lower part of cement retainer will be blocked under cement retainer 1, can be effectively prevented from liquid occur falling
The problem of stream, protect the normal operation of equipment.
Operating cost, while the work that cement retainer 1 is set can be greatly saved in the cement retainer 1 that the application provides
Sequence is simple, flow chart is few, can save the activity duration, operating efficiency is improved, after cement retainer 1 is set, with casing
Inner wall grappling consolidates, and bears the pressure from 1 lower part of cement retainer during the packing of oil gas well shaft.
As depicted in figs. 1 and 2, the cement retainer 1 further includes throw-out collar 16, and the throw-out collar 16 is socketed in the central tube
In 11 outside wall surface, first slip assemblies 12 are connected by the throw-out collar 16 with the limiting section 113, wherein described spacing
The outside diameter in portion 113 is more than the outside diameter of the central tube 11, this makes it possible to by throw-out collar 16 described in 113 card column of limiting section, makes
Used time, cement retainer 1 coordinate.The cement retainer 1 coordinates to set enters well after adapter is connected with setting tool together, reaches
After designing setting depth, it is produced certain thrust by triggering setting tool, promote throw-out collar 16 to move down, packing element 17
It will be squeezed and produce elastic deformation and contact to form initial sealing with internal surface of sleeve pipe.When thrust is more than upper and lower slip spider
After bursting force, slip spider will rupture, and be moved along the conical surface of upper lower cone, until slips tooth and the close anchor of internal surface of sleeve pipe
It is fixed；When the thrust that setting tool provides continues to increase, until more than set the connecting pin limit of adapter and central tube 11 by
Power, pin are pulled off destruction, set, action completion of giving up, and cement retainer 1 stays in design setting depth, recycles setting tool,
Cement retainer 1 stays in design setting depth, and the outside of cement retainer 1 is packing element 17, is compressed after packing element 17 is set to well
Cylinder has carried out comprehensive closure.
As depicted in figs. 1 and 2, the cement retainer 1 further includes the second slip assemblies 13 and the second centrum sleeve, described
Second slip assemblies 13 and the second centrum sleeve by the direction of the packing element 17 to the lower contact 19 be socketed in successively it is described in
In the outside wall surface of heart pipe 11, the packing element 17 passes through the 13 and second centrum sleeve of the second slip assemblies and the lower contact 19
Connect, the 13 wedge shaped shape of the second slip assemblies, the second cone sleeve is equipped with matches somebody with somebody with second slip assemblies 13
The second inclined-plane closed, direction ecto-entad of second inclined-plane along the packing element 17 to the lower contact 19 tilt, this implementation
Be equipped with two slip assemblies in example, two slip assemblies are arranged on the both sides of the packing element 17, while two slips respectively with it is right
The centrum sleeve answered coordinates, so dual-grip design can bidirectional bearing, what cement retainer 1 anchored more stablizes.
When being carried out using the cement retainer 1, cement retainer 1 is connected by adapter with setting tool, by
Different in the setting tool of field operation selection, cement retainer 1 can be by under the instruments such as oil pipe, drilling rod, coiled tubing, cable
Enter within oil gas casing, and set using setting tools such as hydraulic pressure and cables within oil gas casing, cement retainer 1
After the completion of being connected by adapter with setting tool, hold and stayed in 1 tripping in mode tripping in pit shaft of device according to traditional cements, set work
First hollow cavity 111 of the push rod of tool through central tube 11 is connected with pin, fixes the position of the lower contact 19；Then
Promote setting tool and extrude the central tube 11, central tube 11 promotes first slip assemblies 12 to the first cone sleeve one
Side is mobile, the second slip assemblies 13 are moved to the second centrum sleeve side, and the first slip assemblies 12 are along the first cone sleeve
First inclined-plane moves laterally, the second slip assemblies 13 move inclined-plane laterally along the second inclined-plane of the second cone sleeve, makes
The inner wall of the outside wall surface extruding pit shaft of first slip assemblies, 12 and second slip assemblies 13, the first slip assemblies 12 and second
Slip assemblies 13 are supportted on the inner wall of the pit shaft, then proceed to extruding center pipe 11, and central tube 11 promotes the first slip assemblies
12 and second slip assemblies 13 move together and extrude the packing element 17, the packing element 17 is in the first slip assemblies 12 and the second card
Compressive deformation expands between watt component 13, and extrudes the inner wall of the pit shaft, completes to set.
As depicted in figs. 1 and 2, the inner sliding sleeve 18 includes connected linkage section 181 and locking section, the locking section it is interior
Footpath is more than linkage section 181 described in the internal diameter of the linkage section 181 close to the lower contact 19 and cylindrical, the 3rd mistake liquid
Hole 184 is arranged on the linkage section 181, and the described 3rd that both ends open is formed in the cylindric linkage section 181 is hollow
Cavity 182；The locking section includes the locking jaw 183 of multiple strips made of elastic material, multiple locking jaws 183
One end be connected with one end of the linkage section 181 form the columned locking section respectively, and the two neighboring locking
Gap is formed between pawl 183, the other end of each locking jaw 183 is equipped with the protuberance protruded laterally, the center
The mounting groove 114 of a loop on the inner wall of pipe 11, in the mounting groove 114, the mounting groove 114 leans on the protruding parts
One end of the nearly lower contact 19 is equipped with guiding surface, and the guiding surface is along central tube 11 to the direction of lower contact 19 by extroversion
It is tilted；Quarter butt 193 is equipped with second hollow cavity 191, the end of the central tube 11 is resisted against on the short tube, institute
When stating the one end of linkage section 181 away from locking section and being resisted against on the quarter butt 193, first liquid pass hole 112 and the 3rd crosses liquid
Hole 184 connects.
After the completion of cement retainer 1 is set, the supporting insertion tube of tripping in, insertion tube enters first hollow in central tube 11
In cavity 111, it is inserted into inner sliding sleeve 18, the protuberance on locking jaw 183 is stuck in the mounting groove 114 at this time,
Since locking section is the cylindrical-shaped structure that has multiple locking jaws 183 to surround, while each locking jaw 183 is made of elastic material
, therefore when promoting insertion tube, the protuberance on locking jaw 183 can skid off mounting groove 114 along guiding surface, thus
The inner sliding sleeve 18 can be promoted to be moved to the direction of lower contact 19, and after locking jaw 183 is skidded off out of mounting groove 114, it is multiple
The space surrounded inside locking jaw 183 diminishes, and such locking jaw 183 can pin insertion tube, wherein the protruding parts in
First liquid pass hole 112 and the 3rd liquid pass hole 184 are disconnected described in when in mounting groove 114；The inner sliding sleeve 18 is promoted to institute
The direction movement of lower contact 19 is stated, until when the connecting portion of inner sliding sleeve 18 is resisted against on the quarter butt 193, the 3rd liquid pass hole at this time
184th, 192 formation path communicating together of the first liquid pass hole 112 and the second liquid pass hole, so that by insertion tube to the 3rd hollow cavity
Injection cement, cement are flowed out to cement and are held by the 3rd liquid pass hole 184, the first liquid pass hole 112 and the second liquid pass hole 192 in 182
Stay the outside of device 1 to enter in pit shaft, and then a cement mortar plugged zone formed positioned at the downside of cement retainer 1 in pit shaft,
Complete the closure operation to high pressure water layer；Complete block operation after, extract insertion tube, be inserted into exit during drive by
The insertion tube is pinned in locking jaw 183, therefore inner sliding sleeve 18 is moved together with the insertion tube, until the inner sliding sleeve 18
On protuberance be caught in the mounting groove 114, locking jaw 183 unclamps the insertion tube at this time, and inner sliding sleeve 18 is fixed on
In one hollow cavity 111, insertion tube continues to extract recycling, the first liquid pass hole 112 of cut-out of the inner sliding sleeve 18 movement at this time and the
The connection of three liquid pass holes 184, this makes it possible to the liquid or cement effectively prevented in pit shaft to pass through the second liquid pass hole 192, first
112 and the 3rd liquid pass hole 184 of liquid pass hole is returned in this cement retainer 1, and inside forms blind plugging, and comprehensive envelope has been carried out to folding
Stifled, the cement of 1 lower part of cement retainer will be blocked under cement retainer 1, can be effectively prevented from liquid occur falling
The problem of stream, protect the normal operation of equipment.
Preferably, the slips tooth is made of cast iron materials, and the packing element 17 is made of elastomeric material, the central tube 11
It is made with the inner sliding sleeve 18 of aluminium, the second centrum sleeve 15, the second centrum sleeve, throw-out collar 16 and the lower contact 19
It is made of soluble metal material.The second centrum sleeve 15, the second centrum sleeve, throw-out collar 16 and the lower contact 19 are by solvable
Metal material is made, after the end of job, the second centrum sleeve 15, the second centrum sleeve, throw-out collar 16 and the lower contact 19
Voluntarily it can dissolve or degrade in down-hole liquid environment, and its dissolving or degradation time can be by soluble metal materials and can
The dissolving of sol rubber material or degradation speed are pre-adjusted, and are reached cement retainer 1 and are dissolved or degrade in setting time
Purpose, can all dissolve or need to only bore mill part aluminum component, bore time consuming greatly shorten, fundamentally overcome existing cast iron water
Mud holds the deficiency for staying device 1.
As depicted in figs. 1 and 2,12 and second slip assemblies 13 of the first slip assemblies include slip spider and slips
Tooth, the slips tooth are arranged on the slip spider, are more conducively engaged with internal surface of sleeve pipe, and slips denticle product is very small, using returning
Row, while the slip spider and slips tooth are monolithic construction, optimize the mechanism of whole slips, wherein the first slips group
12 and second slip assemblies 13 of part are inserted structure, above 3 teeth, below 4 teeth；Cermet is used as slips tooth, (card
Watt seat is still soluble material) hardness is high, and it is small, it is reasonably distributed, it is more efficient to set.
In the description of the present invention, it is necessary to explanation, term " on ", " under ", "front", "rear", "left", "right", " interior ",
The orientation or position relationship of instructions such as " outer " are based on orientation shown in the drawings or position relationship, are for only for ease of and describe this hair
It is bright and simplify description, rather than instruction or imply that signified device or element must have specific orientation, with specific orientation
Construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for description purpose,
And it is not intended that instruction or hint relative importance.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.In addition, in the description of the present invention, unless otherwise indicated, " multiple " are meant that two or two
More than.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's all other embodiments obtained on the premise of creative work is not made, belong to the scope of protection of the invention.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (7)
- A kind of 1. cement retainer, it is characterised in that：Including the first slip assemblies, central tube, lower contact, the first centrum sleeve, Packing element and inner sliding sleeve, the central tube and the lower contact are tubular structure, and the central tube is internally formed both ends open First hollow cavity, forms the second hollow cavity of one end open in the lower contact, described in one end insertion of the central tube In second hollow cavity of lower contact, the 3rd hollow cavity is formed in the inner sliding sleeve, the inner sliding sleeve is located in described first In cavity body, the central tube is equipped with the first liquid pass hole, and the lower contact is equipped with the connected with first liquid pass hole Two liquid pass holes, the inner sliding sleeve are equipped with the 3rd liquid pass hole connected with the 3rd hollow cavity, and the inner sliding sleeve is described Slide in first hollow cavity to connect the first liquid pass hole and the 3rd liquid pass hole, or cut off the first liquid pass hole and the 3rd liquid pass hole Connection；The outer wall of the central tube other end is equipped with limiting section, along the limiting section to lower contact on the outside of the central tube Direction is arranged with the first slip assemblies, the first centrum sleeve and packing element successively；First slip assemblies connect with the limiting section, and the packing element connects with the lower contact, the first slips group The wedge shaped shape of part, the first cone sleeve are equipped with the first inclined-plane coordinated with first slip assemblies, first inclined-plane Tilted from inside to outside along the limiting section to the direction of the packing element.
- 2. cement retainer according to claim 1, it is characterised in that：The cement retainer further includes throw-out collar, described Throw-out collar is socketed in the outside wall surface of the central tube, and first slip assemblies are connected by the throw-out collar with the limiting section.
- 3. cement retainer according to claim 2, it is characterised in that：The cement retainer further includes the second slips group Part and the second centrum sleeve, second slip assemblies and the second centrum sleeve by the packing element to the direction of the lower contact according to It is secondary to be socketed in the outside wall surface of the central tube, the packing element by second slip assemblies and the second centrum sleeve with it is described Lower contact connects, the wedge shaped shape of the second slip assemblies, and the second cone sleeve is equipped with and second slip assemblies The second inclined-plane coordinated, direction ecto-entad of second inclined-plane along the packing element to the lower contact tilt.
- 4. cement retainer according to claim 3, it is characterised in that：First slip assemblies and the second slip assemblies Include slip spider and slips tooth, the slip spider is socketed in the outside of the central tube, and the slips tooth is fixed at institute State the outer surface of slip spider.
- 5. cement retainer according to any one of claims 1 to 4, it is characterised in that：The inner sliding sleeve includes what is be connected Linkage section and locking section, the internal diameter of the locking section are more than the internal diameter of the linkage sectionThe linkage section is close to the lower contact and cylindrical, and the 3rd liquid pass hole is arranged on the linkage section, cylinder The 3rd hollow cavity of both ends open is formed in the linkage section of shape；The locking section includes the locking jaw of multiple strips made of elastic material, one end difference of multiple locking jaws It is connected with one end of the linkage section and forms the columned locking section, and seam is formed between the two neighboring locking jaw Gap, the other end of each locking jaw are equipped with the protuberance protruded laterally, a loop on the inner wall of the central tube Mounting groove, the protruding parts in the mounting groove, the mounting groove be equipped with close to one end of the lower contact be oriented to it is oblique Face, direction ecto-entad of the guiding surface along central tube to lower contact tilt.
- 6. cement retainer according to claim 5, it is characterised in that：Quarter butt, institute are equipped with second hollow cavity The end for stating central tube is resisted against on the short tube, when the one end of the linkage section away from locking section is resisted against on the quarter butt, First liquid pass hole and the 3rd the liquid pass hole connection.
- 7. cement retainer according to claim 4, it is characterised in that：The slips tooth is made of cast iron materials, described Packing element is made of elastomeric material, and the central tube and the inner sliding sleeve are made of aluminium, the first centrum sleeve, the second centrum Sleeve, throw-out collar and the lower contact are made of soluble metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810004098.6A CN108035694B (en) | 2018-01-03 | 2018-01-03 | Cement retainer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810004098.6A CN108035694B (en) | 2018-01-03 | 2018-01-03 | Cement retainer |
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| CN108035694A true CN108035694A (en) | 2018-05-15 |
| CN108035694B CN108035694B (en) | 2023-11-24 |
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| CN201810004098.6A Active CN108035694B (en) | 2018-01-03 | 2018-01-03 | Cement retainer |
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| CN113279722A (en) * | 2021-06-09 | 2021-08-20 | 门万龙 | Packer for oil exploitation |
| WO2022087087A1 (en) * | 2020-10-23 | 2022-04-28 | Saudi Arabian Oil Company | Modular additive cementing |
| CN114809371A (en) * | 2022-04-29 | 2022-07-29 | 李孝虎 | Energy-conserving thermal insulation wall of assembled building |
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Address after: 610000 No.704, floor 7, building 1, No.167, Jinlu Second Road, Wuhou New Town Management Committee, Wuhou District, Chengdu City, Sichuan Province Applicant after: VERTECHS OIL & GAS TECHNOLOGY Co.,Ltd. Address before: 610000 No. 1-1, No. 1, No. 1, No. four, Wuhou District people south road, Chengdu, Sichuan Province, No. 1-1 24 layer 1-3 Applicant before: VERTECHS OIL & GAS TECHNOLOGY Co.,Ltd. |
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