CN218934374U - Temporary plug for oil-gas well with conical tubes at two ends - Google Patents
Temporary plug for oil-gas well with conical tubes at two ends Download PDFInfo
- Publication number
- CN218934374U CN218934374U CN202320143396.XU CN202320143396U CN218934374U CN 218934374 U CN218934374 U CN 218934374U CN 202320143396 U CN202320143396 U CN 202320143396U CN 218934374 U CN218934374 U CN 218934374U
- Authority
- CN
- China
- Prior art keywords
- spherical
- temporary
- main body
- conical tube
- oil
- 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
Landscapes
- Pipe Accessories (AREA)
Abstract
The application discloses temporary plug for oil and gas well that both ends take conical tube, the temporary plug for oil and gas well that both ends take conical tube comprises spherical temporary plug main part and the conical tube at spherical temporary plug main part both ends, wherein spherical temporary plug main part is made by degradable material, and the conical tube at spherical temporary plug main part both ends is made by degradable ductile material. The temporary plugging for the oil and gas well with the conical pipes at the two ends has super-strong hydrodynamic environment adaptability, can accurately plug the perforation with large leakage loss during the oil and gas well fracturing temporary plugging construction, can realize effective plugging under the condition of lower discharge capacity, can automatically degrade after the construction is finished, does not need flowback operation, and can greatly improve the fracturing operation efficiency.
Description
Technical Field
The application relates to the technical field of downhole tools for oil and gas wells, in particular to a temporary plug for an oil and gas well with conical pipes at two ends.
Background
The fracturing technology has become the important measure of low permeability hydrocarbon reservoir transformation and yield increasing effect nowadays, some specific large leakage perforations are often required to be plugged during fracturing construction, and the conventional temporary plugging balls are used for plugging the perforations, so that the efficiency is low, mainly because the density of the temporary plugging balls is usually large, the actual volume is small, the high-efficiency plugging is difficult to realize under the complex hydrodynamic environment during underground fracturing construction, and the temporary plugging balls are easy to fall off from the perforations after the pump is stopped;
at present, a fiber braided degradable rope knot is also used as a temporary plug and has a certain application effect in the fracturing construction of certain high-temperature oil-gas wells, but due to the complex braiding technology of the temporary plug, the temporary plug of the fiber braided rope knot is high in cost and has higher requirements on the construction stratum temperature due to the technical fields of raw materials, spinning (a plurality of degradable materials with excellent degradation performance are not suitable for spinning) and the like.
Disclosure of Invention
The utility model aims at providing a temporary plug for oil gas well of both ends area conical tube, solved the defect that conventional temporary plug ball and knot formula temporary plug exist.
In order to achieve the above purpose, the present application provides the following technical solutions: a temporary plug for an oil and gas well having tapered tubes at both ends, comprising: the spherical temporary plugging main body is made of degradable materials, and the two ends of the spherical temporary plugging main body are made of first conical pipes and second conical pipes made of degradable ductile materials, wherein the spherical temporary plugging main body can be prepared from one or a mixture of a plurality of materials such as degradable polyurethane materials, polylactic acid, polyglycolic acid, polybutylene succinate, thermoplastic starch, poly (terephthalic acid-adipic acid-butylene glycol) copolyester, polyethylene-vinyl acetate copolymer and the like or related modified materials thereof;
the first conical tube can be prepared from one or more of degradable polyurethane material, polyglycolic acid copolyester, polylactic acid copolyester, polybutylene succinate, poly terephthalic acid-adipic acid-butanediol copolyester, polyethylene glycol and other materials or related modified materials thereof.
As an alternative scheme of the technical scheme of the application, the spherical temporary plugging main body, the first conical tube and the second conical tube are connected together through injection molding or adhesive or welding, and if the same thermoplastic material is adopted, the temporary plugging can be formed by injection molding at one time; if two thermoplastic materials with better compatibility are adopted, the method can be realized by adopting a method of secondary or multiple injection molding or welding; if two materials with poor compatibility are adopted, a proper adhesive can be selected for bonding.
As an alternative scheme of this application technical scheme, spherical temporary plugging main part both ends first conical tube and second conical tube have same size, distribute in spherical temporary plugging main part's both sides symmetrically, adopt both ends symmetric distribution's design like this can adapt to complicated hydrodynamic environment more, promotes shutoff accuracy.
As an alternative to the technical solution of the present application, the spherical temporary plugging body has a spherical structure.
As an alternative of the technical scheme of the application, the length (L1) of the first conical tube and the second conical tube at two ends of the spherical temporary plugging main body is 0.5-3 times of the diameter (D0) of the spherical temporary plugging main body, and too long of the conical tube can affect the throwing of temporary plugging and the conveying in a shaft, but too short of the conical tube can easily cause the reduction of plugging accuracy.
As an alternative of the technical proposal, the inner diameters (D1) of the first conical tube and the second conical tube at the two ends of the spherical temporary plugging main body are always kept constant and are 0.3 to 0.5 times of the diameter (D0) of the spherical temporary plugging main body
As an alternative of the technical scheme, the outer diameter of the first conical tube and the second conical tube at the two ends of the spherical temporary plugging main body, which are contacted with the spherical temporary plugging main body, is 0.6-0.8 times of the diameter (D0) of the spherical temporary plugging main body, so the design mainly considers that the temporary plugging has better embedding performance in the perforation, and the temporary plugging is not easy to fall off from the perforation when the pump is stopped or the pump pressure is suddenly reduced
As an alternative of the technical scheme of the application, the outer wall of the conical tube and the inner wall of the conical tube at two ends of the spherical temporary plugging main body are intersected with one end far away from the spherical temporary plugging main body, and form 4 acute angles.
Compared with the prior art, the beneficial effects of the application are as follows:
1. the hydraulic plugging device has super-strong hydrodynamic environment adaptability, can accurately plug the perforation with large leakage loss during the temporary plugging construction of the oil and gas well fracturing, can also realize effective plugging under the condition of lower discharge capacity, can automatically degrade after the construction is finished, does not need flowback operation, and can greatly improve the fracturing operation efficiency.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic cross-sectional view (with cross-sectional lines) of a temporary plug for an oil and gas well with tapered tubes at both ends;
FIG. 2 is a schematic cross-sectional view of a temporary plug for an oil and gas well with tapered tubes at both ends (without cross-hatching);
FIG. 3 is a front view of a temporary plug for an oil and gas well with tapered tubes at both ends of the plug;
FIG. 4 is a left side view of a temporary plug for an oil and gas well with tapered tubes at both ends.
In the figure: 1. a temporary plugging ball-shaped temporary plugging main body; 2. a first conical tube; 3. a second tapered tube; 4. the inner wall of the conical tube; 5. the outer wall of the conical tube.
Detailed Description
Example 1
As shown in fig. 1 and 3: the utility model provides a temporary plug for oil gas well of conical tube is taken at both ends, includes spherical temporary plug main part 1 and spherical temporary plug main part 1 both ends first conical tube 2, second conical tube 3, and spherical temporary plug main part 1 is prepared through injection molding by the degradable polyurethane material that shore hardness is 95A, and the spherical temporary plug main part 1 of preparation is the sphere that diameter (D0) is 20. And then the spherical temporary plugging main body 1 is put into a special injection mold, and a secondary injection molding process is adopted, so that the first conical tube 2 and the second conical tube 3 are formed on the spherical temporary plugging main body 1 by injection molding of a degradable polyurethane material with the Shore hardness of 70A.
As shown in fig. 3, the first tapered tube 2 and the second tapered tube 3 have the same size and are symmetrically distributed on both sides of the spherical temporary plugging body 1.
As shown in FIG. 2, the length L1 of the conical tubes at both ends of the spherical temporary plugging body 1 is 0.5 times 10mm of D0, and the inner diameters D1 of the first conical tube 2 and the second conical tube 3 are 0.3 times 6mm of D0.
As shown in fig. 2 and 4, the outer diameter D2 of the first conical tube 2 where it contacts the spherical temporary plugging body 1 is 0.6 times 12mm the diameter D0 of the spherical temporary plugging body 1.
As shown in fig. 2, the conical tube inner wall 4 and the conical tube outer wall 5 intersect at the end remote from the spherical temporary plugging body 1 in a cross-sectional view and form 4 acute angles in the cross-sectional view, i.e., angle α shown in fig. 2.
Temporary plugging is carried out through well descending test, the well temperature is 110 ℃, and the fracturing fluid discharge capacity is 5m 3 And (3) perforating at a speed of 12mm, pressurizing at 10MPa, and performing flow back after 2 days, wherein the plugging effect is good.
Example 2
As shown in fig. 1 and 3: the temporary plug for the oil-gas well with conical tubes at two ends comprises a spherical temporary plug main body 1 and a first conical tube 2 and a second conical tube 3 which are arranged at two ends of the spherical temporary plug main body 1, wherein the spherical temporary plug main body 1 is prepared from a degradable polylactic acid material through injection molding, the prepared spherical temporary plug main body 1 is a sphere with the diameter D0 of 15, then the first conical tube 2 and the second conical tube 3 are formed by injection molding on a degradable polyurethane material injection molding machine with the Shore hardness of 70A, and finally the first conical tube 2 and the second conical tube 3 are symmetrically adhered to two sides of the spherical temporary plug main body 1 through polyurethane adhesive.
As shown in fig. 2, the length L1 of the tapered tubes at both ends of the spherical temporary plugging body 1 is 3 times 45mm as large as D0, and the inner diameters D1 of the first tapered tube 2 and the second tapered tube 3 are 0.5 times 7.5mm as large as D0.
As shown in fig. 2 and 4, the outer diameter D2 of the first conical tube 2 where it contacts the spherical temporary plugging body 1 is 0.8 times 12mm the diameter D0 of the spherical temporary plugging body 1.
As shown in fig. 2, the inner and outer walls of the first conical tube 2 and the second conical tube 3 intersect at the end remote from the spherical temporary plugging body 1 from the cross-sectional view, and form 4 acute angles, i.e., the angle α shown in fig. 2.
Temporary plugging is carried out by logging in a well, the temperature of the well is 120 ℃, and the discharge capacity of fracturing fluid is 5m 3 Perforation of 10mm per minute, 9.5MPa of pressurizing, good blocking effect and good sealing effect in the presence ofAfter 4 days, no residue is left in the flowback.
Example 3
As shown in fig. 1 and 3: the utility model provides a temporary plug for oil gas well of conical tube is taken at both ends, includes spherical temporary plug main part 1 and spherical temporary plug main part 1 both ends first conical tube 2, second conical tube 3, and spherical temporary plug main part 1 is prepared through injection molding by the degradable polyurethane material that shore hardness is 95A, and the spherical temporary plug main part 1 of preparation is the sphere that diameter D0 is 20. And then the spherical temporary plugging main body 1 is put into a special injection mold, and a secondary injection molding process is adopted, so that the first conical tube 2 and the second conical tube 3 are formed on the spherical temporary plugging main body 1 by injection molding of a degradable polyurethane material with the Shore hardness of 70A.
As shown in fig. 3, the first tapered tube 2 and the second tapered tube 3 have the same size and are symmetrically distributed on both sides of the spherical temporary plugging body 1.
As shown in FIG. 2, the length L1 of the conical tubes at both ends of the spherical temporary plugging body 1 is 1.4 times 28mm of D0, and the inner diameters D1 of the first conical tube 2 and the second conical tube 3 are 0.4 times 8mm of D0.
As shown in fig. 2 and 4, the outer diameter D2 of the first conical tube 2 where it contacts the spherical temporary plugging body 1 is 0.65 times 13mm the diameter D0 of the spherical temporary plugging body 1.
As shown in fig. 2, the inner and outer walls of the first and second tapered tubes 2 and 3 intersect at the end remote from the spherical temporary plugging body 1 in a sectional view, and form 4 acute angles, i.e., the angle α shown in fig. 2.
Temporary plugging is carried out through well descending test, the well temperature is 100 ℃, and the fracturing fluid discharge capacity is 5m 3 And (3) perforating at 10mm per minute, pressurizing at 11MPa, and ensuring good plugging effect and no residue after 4 days.
Claims (8)
1. The utility model provides a take temporary blocking for oil gas well of conical tube at both ends which characterized in that: the device comprises a spherical temporary plugging main body (1) made of degradable materials and a first conical tube (2) and a second conical tube (3) which are made of degradable ductile materials at two ends of the spherical temporary plugging main body (1).
2. The temporary plug for oil and gas wells with conical tubes at two ends according to claim 1, wherein: the spherical temporary plugging main body (1) is connected with the first conical tube (2) and the second conical tube (3) through injection molding, adhesive or welding.
3. The temporary plug for oil and gas wells with conical tubes at two ends according to claim 1, wherein: the first conical pipes (2) and the second conical pipes (3) at the two ends of the spherical temporary plugging main body (1) have the same size and are symmetrically distributed at the two sides of the spherical temporary plugging main body (1).
4. The temporary plug for oil and gas wells with conical tubes at two ends according to claim 1, wherein: the spherical temporary plugging main body (1) is of a spherical structure.
5. The temporary plug for oil and gas wells with conical tubes at two ends according to claim 1, wherein: the lengths (L1) of the first conical tube (2) and the second conical tube (3) at the two ends of the spherical temporary plugging main body (1) are 0.5-3 times of the diameter (D0) of the spherical temporary plugging main body.
6. The temporary plug for oil and gas wells with conical tubes at two ends according to claim 1, wherein: the inner diameters (D1) of the first conical tube (2) and the second conical tube (3) at the two ends of the spherical temporary plugging main body (1) are kept constant all the time and are 0.3-0.5 times of the diameter (D0) of the spherical temporary plugging main body (1).
7. The temporary plug for oil and gas wells with conical tubes at two ends according to claim 1, wherein: the outer diameter of the first conical tube (2) and the second conical tube (3) at the two ends of the spherical temporary plugging main body (1) which are contacted with the spherical temporary plugging main body (1) is 0.6-0.8 times of the diameter (D0) of the spherical temporary plugging main body (1).
8. The temporary plug for oil and gas wells with conical tubes at two ends according to claim 1, wherein: the inner wall (4) and the outer wall (5) of the conical tubes at the two ends of the spherical temporary plugging main body (1) are intersected with one end far away from the spherical temporary plugging main body (1) and form 4 acute angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320143396.XU CN218934374U (en) | 2023-02-07 | 2023-02-07 | Temporary plug for oil-gas well with conical tubes at two ends |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320143396.XU CN218934374U (en) | 2023-02-07 | 2023-02-07 | Temporary plug for oil-gas well with conical tubes at two ends |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218934374U true CN218934374U (en) | 2023-04-28 |
Family
ID=86082198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320143396.XU Active CN218934374U (en) | 2023-02-07 | 2023-02-07 | Temporary plug for oil-gas well with conical tubes at two ends |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218934374U (en) |
-
2023
- 2023-02-07 CN CN202320143396.XU patent/CN218934374U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111574979B (en) | Temporary plugging agent with tassel-shaped two ends, preparation method and application thereof | |
| CN113027379B (en) | Novel environment-friendly biological knot and using method thereof | |
| CN105189918A (en) | Boring plug provided with mandrel formed from degradable material | |
| CN204252941U (en) | Mining hole-sealing gas hole packer with pressure | |
| CN103740346A (en) | Plugging flexibilizer | |
| CN112696184B (en) | Fracturing construction method for oil and gas well | |
| CN218934374U (en) | Temporary plug for oil-gas well with conical tubes at two ends | |
| CN207436988U (en) | A kind of latus rectum drilling dynamic pressure water burst fast plugging device | |
| CN106869989A (en) | A kind of underground coal mine continuous screen manages and protects hole method | |
| CN106703874A (en) | Multi-point pulse hydrofracturing method for down-hole coal seam | |
| CN114033331A (en) | Rope knot type temporary plugging agent and temporary plugging method | |
| CN207437046U (en) | Continuous ball throwing device | |
| CN206000501U (en) | A kind of suspension type self-expanding blocks tubing string | |
| CN106928947B (en) | Plugging material, plugging device and plugging method for annular space between sleeves | |
| CN105649625A (en) | High-low-pressure subarea fracturing anatonosis type coal seam water injection method | |
| CN111006560B (en) | Filling device, filling structure and deep hole fracturing method | |
| CN104975835B (en) | Elastic fracturing ball seat | |
| CN206802540U (en) | Flexible composite high pressure pipeline connecting pipe | |
| CN204152475U (en) | Layer-through drilling list pouch hole sealing device | |
| CN206617152U (en) | A kind of oil well work-in-progress control treatment process system | |
| CN212671679U (en) | But quick degradation's seal structure | |
| CN114458233A (en) | Special-shaped structure temporary blocking ball with double-layer structure | |
| CN202023529U (en) | Friction type multifunctional hole packer for drawing out methane or injecting water | |
| CN207004499U (en) | Coiled tubing drags Hydrojet staged fracturing tool | |
| CN115109572B (en) | High-strength deformable degradable knot temporary plugging ball and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |