Anti-corrosion reinforcing assembly for one-well multi-hanging interface lining of oil field well pattern pipeline
By using a combined structure of lined steel pipe and composite hose at the multi-hanging interface of the well-lined well network pipeline of the oil field well, combined with PE tee joints and cement mortar filling, the corrosion protection problem of pipeline overlap points is solved, and the overall anti-corrosion effect and service life are improved.
Patent Information
- Application Number
- CN202422482260.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-15
AI Technical Summary
In the prior art, the pipeline overlap points of multiple hanging wells of oilfield wells in oil field wells have not been lining to prevent corrosion, which affects the overall life of the pipeline.
The straight pipe section and the hook section are lined with steel pipe inner lined with composite hoses, and are connected by PE tee joints and steel insulation blind flanges. Cement injection outer sleeves are installed on the outside to fill the cement mortar to ensure the connection seal and strength.
It realizes all-round corrosion protection of pipeline lap interfaces and extends the service life of pipelines.
Smart Images
Figure CN223153158U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of anti-corrosion reinforcement repair of pipeline inner linings, and particularly relates to an anti-corrosion reinforcement assembly for the inner lining of multi-hanging interfaces of one well in oilfield well network pipelines. Background Art
[0002] According to the data, the service life of the old pipeline repaired by the inverting method with a lined composite hose can be extended by more than 30 years. The inverting method of lining a composite hose to repair an old pipeline uses a fiber-reinforced hose with an anti-permeation layer and impregnated with a special resin as the forming material for the new pipeline. The old pipeline serves as the inverting channel and forming cavity for the new pipeline. A special hose conveyor is used to invert and feed the hose into the old pipeline, so that the resin layer of the hose adheres to the inner wall of the old pipeline, and the anti-seepage layer becomes the inner wall surface of the new pipeline. The resin impregnated in the lined pipe is cured by heating or room-temperature curing to form a firm steel-plastic composite pipe.
[0003] At present, the inner lining anti-corrosion reinforcement repair of the inverting composite hose for the oilfield well network pipelines is only carried out on the straight pipe sections, and the inner lining anti-corrosion is not done for the overlapping points of the pipelines with multiple hangings per well in the oilfield, which affects the overall life of the pipelines. Summary of the Utility Model
[0004] In order to solve the problem of inner lining anti-corrosion at the overlapping points of the pipelines with multiple hangings per well, improve the overall anti-corrosion effect of the pipelines, and extend the service life of the pipelines, the present application discloses an anti-corrosion reinforcement assembly for the inner lining of multi-hanging interfaces of one well in oilfield well network pipelines.
[0005] The technical solution provided by the utility model is: an anti-corrosion reinforcement assembly for the inner lining of multi-hanging interfaces of one well in oilfield well network pipelines, including a lined steel pipe for the straight pipe section and a lined steel pipe for the hanging section. The lined steel pipe for the straight pipe section and the lined steel pipe for the hanging section are respectively lined with composite hoses. A PE three-way joint for connecting the lined steel pipe for the hanging section and the lined steel pipe for the straight pipe section is arranged between the lined steel pipe for the straight pipe section and the lined steel pipe for the hanging section. The ends of the PE three-way joint are respectively adhesively bonded to the composite hoses inside the lined steel pipe for the straight pipe section and the lined steel pipe for the hanging section. Steel heat-insulating blind flanges are respectively welded and connected to both sides outside the lined steel pipe for the straight pipe section. A steel heat-insulating blind flange is also welded and connected outside the lined steel pipe for the hanging section. A cement injection outer pipe is arranged between the three steel heat-insulating blind flanges. The cement injection outer pipe is arranged outside the lined steel pipe for the straight pipe section and the lined steel pipe for the hanging section. Spaces for filling cement mortar are left between the cement injection outer pipe and the lined steel pipe for the straight pipe section and the lined steel pipe for the hanging section. A cement mortar injection exhaust hole is arranged on the cement injection outer pipe.
[0006] A further technical solution is as follows: A PE heat shrinkable sleeve is sleeved at the pipe orifice of the lined steel pipe of the straight pipe section. The PE heat shrinkable sleeve is sleeved between the lined steel pipe of the straight pipe section and the PE tee joint. After the PE heat shrinkable sleeve is heated, it shrinks to seal the connection between the lined steel pipe of the straight pipe section and the PE tee joint; A PE heat shrinkable sleeve is sleeved at the pipe orifice of the lined steel pipe of the hanging section. The PE heat shrinkable sleeve is sleeved between the lined steel pipe of the hanging section and the PE tee joint. After the PE heat shrinkable sleeve is heated, it shrinks to seal the connection between the lined steel pipe of the hanging section and the PE tee joint.
[0007] A further technical solution is as follows: The composite hose lined at the pipe orifice of the lined steel pipe of the straight pipe section is turned outwards, and the PE heat shrinkable sleeve outside the lined steel pipe of the straight pipe section is sleeved on the turned-up edge of the composite hose; The composite hose lined at the pipe orifice of the lined steel pipe of the hanging section is turned outwards, and the PE heat shrinkable sleeve outside the lined steel pipe of the hanging section is sleeved on the turned-up edge of the composite hose.
[0008] A further technical solution is as follows: There are three cement mortar injection exhaust holes, which are respectively arranged on three sections of the cement injection outer sleeve.
[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: The utility model solves the technical problem of internal anti-corrosion reinforcement of the pipeline lap joint, realizes the internal anti-corrosion of the lap pipeline without dead angle as a whole, and improves the service life of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 is a schematic structural diagram of the utility model.
[0011] In the figure: 1. Lined steel pipe of the straight pipe section; 2. Composite hose; 3. Cement injection outer sleeve; 4. Cement mortar; 5. Lined steel pipe of the hanging section; 6. PE heat shrinkable sleeve; 7. PE tee joint; 8. Cement mortar injection exhaust hole; 9. Steel heat insulation blind flange. DETAILED DESCRIPTION OF THE INVENTION
[0012] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0013] Refer to Figure 1 , this embodiment includes a lined steel pipe 1 of the straight pipe section and a lined steel pipe 5 of the hanging section. The formation at the connection of the lined steel pipe 1 of the straight pipe section and the lined steel pipe 5 of the hanging section is dug open, and the composite hose 2 is respectively turned into the lined steel pipe 1 of the straight pipe section and the lined steel pipe 5 of the hanging section by using a pipe turning device.
[0014] The composite hose 2 lined inside the pipe orifice of the straight pipe section lined steel pipe 1 is turned outwards, and the composite hose 2 lined inside the pipe orifice of the hanging section lined steel pipe 5 is turned outwards. A PE heat shrinkable sleeve 6 is sleeved on the pipe orifice of the straight pipe section lined steel pipe 1, and the PE heat shrinkable sleeve 6 is sleeved outside the turned-out edge. Similarly, a PE heat shrinkable sleeve 6 is sleeved on the pipe orifice of the hanging section lined steel pipe 5, and the PE heat shrinkable sleeve 6 is also sleeved outside the turned-out edge.
[0015] A PE three-way joint 7 for connecting the hanging section lined steel pipe 5 and the straight pipe section lined steel pipe 1 is arranged between the straight pipe section lined steel pipe 1 and the hanging section lined steel pipe 5. The ends of the PE three-way joint 7 and the composite hoses 2 inside the straight pipe section lined steel pipe 1 and the hanging section lined steel pipe 5 are respectively bonded by an adhesive. Thus, the inner anti-corrosion of the lapped pipeline is achieved without dead angles as a whole, and the service life of the pipeline is improved.
[0016] The PE heat shrinkable sleeve 6 will shrink after being heated. Slide the PE heat shrinkable sleeve 6 to cover the connection between the straight pipe section lined steel pipe 1 and the PE three-way joint 7, and heat the PE heat shrinkable sleeve 6 to seal the connection. In the same way, slide the PE heat shrinkable sleeve 6 to cover the connection between the hanging section lined steel pipe 5 and the PE three-way joint 7, and heat the PE heat shrinkable sleeve 6 to seal the connection.
[0017] Steel heat insulation blind flanges 9 are respectively welded and connected to both sides outside the straight pipe section lined steel pipe 1. Steel heat insulation blind flanges 9 are also welded and connected outside the hanging section lined steel pipe 5. A steel cement injection outer pipe 3 is arranged between the three steel heat insulation blind flanges 9. The steel cement injection outer pipe 3 is composed of two semi-bodies. After splicing, it is fixedly connected by welding. The steel cement injection outer pipe 3 is respectively welded and connected to the three steel heat insulation blind flanges 9. The steel cement injection outer pipe 3 is sleeved outside the straight pipe section lined steel pipe 1 and the hanging section lined steel pipe 5. Spaces for filling cement mortar 4 are left between the steel cement injection outer pipe 3 and the straight pipe section lined steel pipe 1 and the hanging section lined steel pipe 5. A cement mortar injection exhaust hole 8 is arranged on the steel cement injection outer pipe 3. Cement mortar 4 is injected into the steel cement injection outer pipe 3 through the cement mortar injection exhaust hole. The strength of the solidified cement mortar 4 is very high, ensuring that the connection strength of the hanging pipeline meets the standard. There are three cement mortar injection exhaust holes 8, which are respectively arranged on the three sections of the steel cement injection outer pipe 3. The three cement mortar injection exhaust holes 8 can improve the uniformity of the filling of the cement mortar 4, reduce air bubbles, and ensure that the filling is in place.
Claims
1. An inner lining anti-corrosion and reinforcement component for a multi-hanging interface of one well in an oilfield well pattern pipeline, characterized in that: It includes a straight-section lined steel pipe (1) and a hanging-section lined steel pipe (5). The straight-section lined steel pipe (1) and the hanging-section lined steel pipe (5) are respectively lined with a composite hose (2). A PE three-way joint (7) for connecting the hanging-section lined steel pipe (5) and the straight-section lined steel pipe (1) is arranged between the straight-section lined steel pipe (1) and the hanging-section lined steel pipe (5). The ends of the PE three-way joint (7) are adhesively bonded to the composite hoses (2) inside the straight-section lined steel pipe (1) and the hanging-section lined steel pipe (5) respectively. Steel heat-insulating blind flanges (9) are welded on both sides of the outside of the straight-section lined steel pipe (1), and steel heat-insulating blind flanges (9) are also welded on the outside of the hanging-section lined steel pipe (5). A cement injection outer pipe (3) is arranged between the three steel heat-insulating blind flanges (9). Spaces for filling cement mortar (4) are left between the cement injection outer pipe (3) and the straight-section lined steel pipe (1) and the hanging-section lined steel pipe (5). A cement mortar injection exhaust hole (8) is arranged on the cement injection outer pipe (3).
2. The inner lining anti-corrosion and reinforcement component for the multi-hanging interface of a single well in the pipeline of an oilfield well pattern according to claim 1, characterized in that: A PE heat-shrinkable sleeve (6) is sleeved at the pipe orifice of the straight-section lined steel pipe (1). The PE heat-shrinkable sleeve (6) is sleeved between the straight-section lined steel pipe (1) and the PE three-way joint (7). After being heated, the PE heat-shrinkable sleeve (6) shrinks to seal the connection between the straight-section lined steel pipe (1) and the PE three-way joint (7); a PE heat-shrinkable sleeve (6) is also sleeved at the pipe orifice of the hanging-section lined steel pipe (5). The PE heat-shrinkable sleeve (6) is sleeved between the hanging-section lined steel pipe (5) and the PE three-way joint (7). After being heated, the PE heat-shrinkable sleeve (6) shrinks to seal the connection between the hanging-section lined steel pipe (5) and the PE three-way joint (7).
3. The inner lining anti-corrosion and reinforcement component for one well with multiple hanging interfaces of oilfield well network pipelines according to claim 2, wherein: The composite hose (2) lined inside the pipe orifice of the straight-section lined steel pipe (1) is turned outwards, and the PE heat-shrinkable sleeve (6) outside the straight-section lined steel pipe (1) is sleeved on the turned-out edge of the composite hose (2); the composite hose (2) lined inside the pipe orifice of the hanging-section lined steel pipe (5) is turned outwards, and the PE heat-shrinkable sleeve (6) outside the hanging-section lined steel pipe (5) is sleeved on the turned-out edge of the composite hose (2).
4. A corrosion-resistant and reinforcement component with multiple hanging interfaces for one well in the pipeline of an oilfield well pattern according to claim 1, characterized in that: There are three cement mortar injection exhaust holes (8), which are respectively arranged on the three sections of the cement injection outer pipe (3).