CN212054599U - Controllable soluble sleeve blanking plug - Google Patents
Controllable soluble sleeve blanking plug Download PDFInfo
- Publication number
- CN212054599U CN212054599U CN202020066213.5U CN202020066213U CN212054599U CN 212054599 U CN212054599 U CN 212054599U CN 202020066213 U CN202020066213 U CN 202020066213U CN 212054599 U CN212054599 U CN 212054599U
- Authority
- CN
- China
- Prior art keywords
- mandrel
- plug
- slip
- tailstock
- slip assemblies
- 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.)
- Active
Links
Images
Abstract
The utility model provides a controllable soluble sleeve pipe blanking plug, include: the slip-type pipe comprises a mandrel, two compression rings, two groups of slip assemblies, two taper sleeves, a rubber cylinder assembly and a plug; the upper end of the mandrel can be connected with a setting device, and the lower end of the mandrel is connected with a tailstock through external threads; the two compression rings are respectively sleeved on the upper part and the lower part of the mandrel, and the compression ring sleeved on the lower part of the mandrel leans against the upper end face of the tailstock; the two groups of slip assemblies are oppositely arranged in the opening direction, the upper parts of the slip assemblies lean against the lower end surface of one compression ring, and the lower parts of the slip assemblies lean against the upper end surface of the other compression ring; the two taper sleeves are respectively sleeved on the mandrel, and the conical surface of each taper sleeve respectively extends into the inner sides of the slip assemblies; the rubber cylinder assembly is arranged between the two taper sleeves; the upper end of the plug extends into the lower port of the mandrel, and a shearing pin is connected between the side wall of the lower end of the plug and the tailstock; the core shaft is made of magnesium-aluminum alloy, and waterproof coatings are sprayed on the core shaft except for the part where the plug is assembled.
Description
Technical Field
The utility model belongs to the technical field of oil gas well fracturing transformation, concretely relates to controllable soluble sleeve pipe blanking plug.
Background
At present, after fracturing construction is finished, oil pipes need to be put into the fracturing construction for production under the condition of operation under pressure in limited-grade and unlimited-grade sleeve sliding sleeve multi-layer multi-section fracturing construction developed domestically. Currently, this operation has: the construction risk is large, the operation cost is high and the operation period is long. Therefore, the casing pipe plugging device is urgently needed to be designed, the risk of drilling under pressure in the later period is avoided, the construction cost is saved, the construction period is shortened, and a foundation is laid for further large-scale application of the optical casing pipe fracturing technology.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is an object of the present invention to provide a controllable soluble casing plug for overcoming the above problems or at least partially solving or alleviating the above problems.
The utility model provides a controllable soluble sleeve pipe blanking plug, include:
the upper end of the mandrel can be connected with a setting device, and the lower end of the mandrel is connected with a tailstock through external threads;
the two compression rings are respectively sleeved on the upper part and the lower part of the core shaft, and the compression rings sleeved on the lower part of the core shaft lean against the upper end face of the tailstock;
the two groups of slip assemblies are arranged oppositely in the opening direction, the upper part of one group of slip assemblies leans against the lower end face of one compression ring, and the lower part of one group of slip assemblies leans against the upper end face of one compression ring;
the two taper sleeves are respectively sleeved on the mandrel, and the conical surface of each taper sleeve respectively extends into the inner sides of the slip assemblies;
the rubber sleeve assembly is arranged between the two taper sleeves;
the upper end of the plug extends into the lower port of the mandrel, and a shearing pin is connected between the side wall of the lower end of the plug and the tailstock;
the core shaft is made of magnesium-aluminum alloy, and waterproof coatings are sprayed on the core shaft except the contact position of the assembling plug.
The utility model discloses optional characteristic below still having.
Optionally, the taper sleeve is made of magnesium aluminum alloy, and a waterproof coating is sprayed on the outer surface of the taper sleeve.
Optionally, the pressure ring is made of magnesium aluminum alloy, and waterproof coatings are respectively sprayed on the surface of the pressure ring except the inner side surface.
Optionally, the rubber sleeve assembly comprises two side rubber sleeves and a middle rubber sleeve, the middle rubber sleeve is located between the two side rubber sleeves, and the two side rubber sleeves are respectively in contact with the two taper sleeves.
Optionally, the outer surfaces of the side rubber cylinders and the middle rubber cylinder are sprayed with waterproof coatings.
Optionally, the slip assembly comprises a plurality of slip pieces, binding grooves are respectively formed in side walls of the front end and the rear end of each slip piece, and a row of slip teeth are respectively arranged on the side walls of each slip piece.
The utility model has the advantages that:
the utility model discloses a controllable soluble sleeve pipe blanking plug accessible is set and is sealed and give up controllable soluble sleeve pipe blanking plug at the oil well sleeve intraductal with setting up the device, make it block up the oil well sleeve pipe, avoid the oil well sheathed tube internal high pressure to spill over, need not take the area the device just can be with the oil well cover of putting into under the production tubing pressure intraductal, toward the oil well sheathed tube in high-pressure liquid of beating again, the end cap in the dabber that makes controllable soluble sleeve pipe blanking plug breaks away from, open the production passageway, because the end cap breaks away from, the epaxial dissolution position of dabber exposes, make it begin to dissolve under the liquid action.
Further, the utility model discloses a controllable soluble sleeve pipe blanking plug can avoid the area after the smooth sleeve pipe fracturing and press the brill operation down, has practiced thrift the running cost, has shortened construction cycle.
Drawings
Fig. 1 is a schematic diagram of a half-section structure of a controllable soluble casing plug of the present invention.
In the above figures: 1, a mandrel; 2, a tailstock; 3, pressing a ring; 4, a slip assembly; a 401 card tile; 402 a binding slot; 403 slip elements; 5, taper sleeve; 6, plugging the plug; 7 side rubber cylinders; 8, a middle rubber cylinder; 9 shearing the pin; 10 sealing rings.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Detailed Description
Example 1
Referring to fig. 1, an embodiment of the present invention provides a controllable soluble casing plug, including: the slip-type pipe fitting comprises a mandrel 1, two compression rings 3, two groups of slip assemblies 4, two taper sleeves 5 and a plug 6; the upper end of the mandrel 1 can be connected with a setting device, and the lower end of the mandrel 1 is connected with a tailstock 2 through external threads; the two compression rings 3 are respectively sleeved on the upper part and the lower part of the mandrel 1, and the compression ring 3 sleeved on the lower part of the mandrel 1 leans against the upper end face of the tailstock 2; the two groups of slip assemblies 4 are oppositely arranged in the opening direction, the upper parts of the slip assemblies 4 lean against the lower end surface of one compression ring 3, and the lower parts of the slip assemblies 4 lean against the upper end surface of the compression ring 3; the two taper sleeves 5 are respectively sleeved on the mandrel 1, and the conical surface of each taper sleeve 5 respectively extends into the inner sides of the slip assemblies 4; the rubber cylinder component is arranged between the two taper sleeves 5; the upper end of the plug 6 extends into the lower port of the mandrel 1, and a shearing pin 10 is connected between the side wall of the lower end of the plug 6 and the tailstock 2.
The utility model discloses a lower extreme threaded connection tailstock 2 of dabber 1 in the controllable soluble sleeve pipe blanking plug, the cover is equipped with a pair of clamping ring 3 on dabber 1 of tailstock 2 top, two sets of slips assemblies 4 of suit between two clamping rings 3, two taper sleeves 5 of suit between two sets of slips assemblies 4, suit packing element subassembly between two taper sleeves 5, form and sit stopper mechanism, because the lower port of dabber 1 is plugged by end cap 6, end cap 6 is connected through shear pin 10 with tailstock 2, form block structure. After the construction of oil gas well fracturing, will through sitting the stopper instrument the utility model discloses a controllable soluble sleeve pipe blanking plug is transferred and is sat the stopper and give up the operation behind the oil well sleeve pipe prepositioning, make two sets of slips assemblies 4 and packing element seat in the oil well sleeve pipe, the high pressure that the excessive gas formation of oil well sleeve pipe of blanking plug below this moment is gone up can not exert an influence to the blanking plug top, make things convenient for the staff to exempt from to take the pressure oil pipe effect of going into the well, the back is accomplished in the operation, the rethread oil pipe lets in high-pressure liquid toward the oil well sleeve intraductal, after the blanking plug head vertical differential pressure reaches 15-30MPa, the lower extreme that breaks away from dabber 1 behind end cap 6 cutting.
Example 2
Referring to fig. 1, on the basis of embodiment 1, a mandrel 1 is made of magnesium-aluminum alloy, and waterproof coatings are sprayed on the mandrel 1 except for the part where a plug 6 is assembled.
Example 3
Referring to fig. 1, on the basis of example 1, the taper sleeve 5 is made of magnesium aluminum alloy, and the outer surface of the taper sleeve 5 is sprayed with a waterproof coating.
The taper sleeve 5 is arranged on the mandrel 1 and then sprayed with the waterproof coating, when the mandrel 1 is dissolved, the inner side surface of the taper sleeve 5, which is in contact with the mandrel 1, is exposed in a liquid environment, and the taper sleeve 5 starts to dissolve until the taper sleeve completely disappears.
Example 4
Referring to fig. 1, on the basis of embodiment 1, the pressure ring 3 is made of magnesium-aluminum alloy, and the surfaces of the pressure ring 3 except the inner side surfaces are respectively sprayed with waterproof coatings.
The waterproof coating is sprayed after the compression ring 3 is installed on the mandrel 1, after the mandrel 1 is dissolved, the inner side surface of the compression ring 3, which is in contact with the mandrel 1, is exposed in a liquid environment, and the compression ring 3 begins to dissolve until the compression ring completely disappears.
Example 5
Referring to fig. 1, on the basis of embodiment 4, the rubber sleeve assembly comprises two side rubber sleeves 7 and a middle rubber sleeve 8, wherein the middle rubber sleeve 8 is located between the two side rubber sleeves 7, and the two side rubber sleeves 7 are respectively in contact with the two taper sleeves 5.
After the middle parts of the two side rubber cylinders 7 and the middle rubber cylinder 8 are expanded when being extruded by the two taper sleeves 5, multiple plugging can be realized between the mandrel 1 and the oil well casing pipe, and the tightness of setting is improved.
Example 6
On the basis of the embodiment 4, the outer surfaces of the side rubber cylinders 7 and the middle rubber cylinder 8 are sprayed with waterproof coatings.
Two side packing elements 7 and a well packing element 8 in the packing element subassembly are all made by dissolvable material, assemble it on dabber 1 after again spray waterproof coating, after it sets up, its inside surface contacts with dabber 1, can not contact liquid, and after dabber 1 dissolved, the inside surface contact liquid of two side packing elements 7 and a well packing element 8 just begins to dissolve, and is disappeared completely.
Example 7
On the basis of embodiment 1, the slip assembly 4 comprises a plurality of slip sheets 401, wherein the side walls of the front end and the rear end of each slip sheet 401 are respectively provided with a binding groove 402, and the side walls of each slip sheet 401 are respectively provided with a row of slip teeth 403.
After a plurality of slips 401 splice into slips assembly 4, tie up it together after walking around the ligature groove 402 on the lateral wall of every calorie tile 401 front end and rear end with iron wire or rope, when the setting, iron wire or rope fracture, each calorie tile 401 slides the back along the inclined plane that corresponds on the taper sleeve 5 to collude on oil well casing's inside wall through slips 403, be difficult to the slippage.
Example 8
When the controllable soluble casing blanking plug of the utility model is used, firstly, the controllable soluble casing blanking plug is connected on the gunpowder setting tool through the pin, and the lower part of the controllable soluble casing blanking plug is inserted into a specific position in the oil well casing; then, igniting the gunpowder setting tool to realize setting and releasing of the controllable soluble casing plugging tool in the oil well casing; and finally, putting a production oil pipe into the oil well casing, then pressing the oil well casing, and knocking off a plug in the controllable soluble casing plug to open a production channel, wherein the whole controllable soluble casing plug starts to dissolve until the controllable soluble casing plug is completely dissolved.
After the gunpowder setting tool is ignited, the pressing ring 3 moves downwards under the action of the gunpowder pushing cylinder, the slip assembly 4 is dragged to move axially, each slip tooth 401 expands radially, and finally contacts with an oil well casing pipe, and the whole plugging device is fixed; meanwhile, the taper sleeve 5 is pushed by the slip assembly 4 axially and then extrudes the two side rubber cylinders 7 and the middle rubber cylinder 8, so that the two side rubber cylinders and the middle rubber cylinder are compressed and deformed and then expand radially to form sealing with an oil well casing, at the moment, the slip assembly 4 is completely anchored on the side wall of the oil well casing, under the continuous action of gunpowder explosive gas, the pin connected with the upper end of the core shaft 1 is sheared off by the gunpowder setting tool, and the releasing process of the gunpowder setting tool and the blocking tool is completed; because there is no pressure above the plugging tool at this moment, the production tubing operation below the pressure-free can be carried out, after the production tubing is completely placed, the wellhead is pressed to 35-50MPa, the plug 6 at the lower end of the mandrel 1 is pushed by high pressure to move downwards, the shear pin 9 is cut off and then separated from the mandrel 1, the production channel is opened, meanwhile, the mandrel 1 starts to dissolve, and finally, all parts of the plugging device are dissolved in sequence, so that the smooth shaft state is maintained, and any influence on the subsequent operation can not be generated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (6)
1. A controllably dissolvable cannula plug, comprising:
the upper end of the mandrel (1) is connected with a setting device, and the lower end of the mandrel (1) is connected with a tailstock (2) through external threads;
the two compression rings (3) are respectively sleeved on the upper part and the lower part of the mandrel (1), and the compression rings (3) sleeved on the lower part of the mandrel (1) lean against the upper end face of the tailstock (2);
the two groups of slip assemblies (4) are oppositely arranged in the opening direction, the upper part of one group of slip assemblies (4) leans against the lower end face of one compression ring (3), and the lower part of one group of slip assemblies (4) leans against the upper end face of one compression ring (3);
the two taper sleeves (5) are respectively sleeved on the mandrel (1), and the conical surface of each taper sleeve (5) extends into the inner side of one group of the slip assemblies (4);
the rubber sleeve component is arranged between the two taper sleeves (5);
the upper end of the plug (6) extends into the lower port of the mandrel (1), and a shearing pin (10) is connected between the side wall of the lower end of the plug (6) and the tailstock (2);
the core shaft (1) is made of magnesium-aluminum alloy, and waterproof coatings are sprayed on the core shaft (1) except for the part where the plug (6) is assembled.
2. A controllably dissolvable cannula plug according to claim 1, wherein the cone (5) is made of magnesium aluminum alloy and the outer surface of the cone (5) is sprayed with a water-proof coating.
3. A controllably soluble cannula obturator according to claim 1, characterized in that the press ring (3) is made of magnesium aluminium alloy, the surface of the press ring (3) except the inner side is coated with a water-proof coating respectively.
4. A controllable soluble casing plug according to claim 1, characterized in that said rubber cartridge assembly comprises two side rubber cartridges (7) and a middle rubber cartridge (8), said middle rubber cartridge (8) being located between said two side rubber cartridges (7), said two side rubber cartridges (7) being in contact with said two cones (5), respectively.
5. A controllably dissolvable cannula plug according to claim 4, characterized in that the outer surfaces of the side packing elements (7) and the middle packing element (8) are sprayed with a water-proof coating.
6. A controllable soluble casing plug according to claim 1, wherein the slip assembly (4) comprises a plurality of slip segments (401), each slip segment (401) having a respective tie groove (402) formed in a side wall of a front end and a rear end thereof, and each slip segment (401) having a respective row of slip teeth (403) formed in a side wall thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020066213.5U CN212054599U (en) | 2020-01-14 | 2020-01-14 | Controllable soluble sleeve blanking plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020066213.5U CN212054599U (en) | 2020-01-14 | 2020-01-14 | Controllable soluble sleeve blanking plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212054599U true CN212054599U (en) | 2020-12-01 |
Family
ID=73536679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020066213.5U Active CN212054599U (en) | 2020-01-14 | 2020-01-14 | Controllable soluble sleeve blanking plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212054599U (en) |
-
2020
- 2020-01-14 CN CN202020066213.5U patent/CN212054599U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4751836A (en) | Pipe end conditioner and method | |
| CN110905443B (en) | Soluble metal sealing fracturing bridge plug | |
| CN106555574B (en) | Sand prevention and steam injection integrated device and method | |
| CN109611055B (en) | Passive disintegration type soluble bridge plug | |
| CN106437614B (en) | The solvable degradable press-fracturing bridge plug of horizontal well full-bore | |
| CN211549659U (en) | Long-life water injection string of offshore oil field | |
| CN112412387B (en) | Reusable gas drilling two-plugging one-injection integrated hydraulic packer | |
| CN104213888B (en) | A kind of thick oil thermal extraction down-hole steam injection string | |
| CN111594093A (en) | Thermal recovery high-temperature-resistant carbon fiber rubber sleeve packer | |
| CN111088958A (en) | Controllable soluble casing plug and pressure-free tubing downhole method | |
| CN110331959B (en) | Plugging tool | |
| CN112709557B (en) | Safe and long-acting water injection string for offshore oil field and construction method | |
| CN212054599U (en) | Controllable soluble sleeve blanking plug | |
| CN106869893B (en) | Perforation/pressure break/packing integrated apparatus and its multistage fracturing process pipe string | |
| CN108425655A (en) | Retrievable hanging packer for flow string under no killing well | |
| CN206280047U (en) | Temporary blocking type big orifice bridging plug | |
| CN209011780U (en) | It is a kind of without anchoring thermal packer | |
| CN207905768U (en) | Retrievable hanging packer for flow string under no killing well | |
| CN217270122U (en) | Double-slip soluble bridge plug without mandrel | |
| CN206816238U (en) | A kind of igniting cabin for high pressure bridging plug setting tool | |
| CN211448612U (en) | Anti-blocking bridge plug | |
| US2713907A (en) | Wire line packer and tubing string combination | |
| CN205858229U (en) | A kind of bridge plug feeder and seating nipple thereof | |
| CN214499018U (en) | FDC all-metal soluble fracturing nipple | |
| CN109505558B (en) | Easy drilling bridge plug |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |