Wrapping type heat insulation and heat preservation oil pipe with novel structure
By filling the space between the tubing body and the outer pipe with insulation material and using a new type of externally wrapped thermal insulation tubing with expansion joints, the problems of poor flow performance and welding cracks caused by the drop in oil well fluid temperature have been solved, achieving energy-saving and environmentally friendly oilfield production.
Patent Information
- Application Number
- CN202520084388.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2035-01-14
AI Technical Summary
During oil and gas extraction, the drop in well fluid temperature leads to poor flow performance. Traditional heating methods are energy-intensive, and welded oil pipes are prone to cracking, affecting mechanical properties.
The new externally wrapped thermal insulation oil pipe adopts a new structure. By filling the annular space between the oil pipe body and the outer pipe with insulation material, and using expansion joints, the length of the outer pipe can be freely adjusted, avoiding welding points and ensuring the mechanical properties and temperature stability of the oil pipe.
It effectively prevents liquid energy loss, reduces production energy consumption, achieves green and environmentally friendly production, avoids oil pipe cracking, maintains flow performance, and reduces maintenance frequency and costs.
Smart Images
Figure CN223524699U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oil and gas exploitation technical field especially relates to a new structure heat insulation and heat preservation oil pipe of outer wrap formula. BACKGROUND
[0002] In the exploitation of oil and gas, the liquid in the oil well flows into the cluster pipeline or the oil storage device through the oil pump, the oil pipe and the wellhead, in this process, the liquid temperature at the bottom of the oil well is relatively high, and the flow performance is good, when reaching the upper part of the oil well, the liquid temperature drops relatively fast due to the low temperature of the wellhead, and the flow performance is poor, which causes poor flow performance of the liquid.
[0003] In order to keep the liquid mined in the oil well with good flowability, the liquid needs to have a certain temperature, in the past, in order to keep the temperature, the electric, coal or natural gas heating method is adopted, this method not only needs a special heating device, but also needs to consume a large amount of energy, with the strengthening of environmental protection consciousness, this traditional oil extraction heating method will be gradually eliminated.
[0004] In addition, the inner and outer pipes of the traditional heat preservation oil pipe are connected by welding, and the liquid temperature discharged by the heating device or the deep underground liquid itself is relatively high, and the inner and outer pipes are subjected to different forces, so that the welding points of the inner and outer pipes are easily cracked due to thermal expansion and cold contraction, so that continuous maintenance is needed. SUMMARY
[0005] The utility model provides a new structure heat insulation and heat preservation oil pipe of outer wrap formula can prevent the energy loss of the liquid in the oil well pipe, guarantees the temperature in the oil pipe liquid, has no welding point and hot melting point, makes the oil pipe keep the original mechanical property, through the telescopic short section can realize the real time free adjustment of the outer pipe in the length direction, prevent the cracking phenomenon of the oil pipe body and the outer pipe because of the temperature, the different force size makes the elongation of the oil pipe body and the outer pipe inconsistent.
[0006] A new structure heat insulation and heat preservation oil pipe of outer wrap formula, including the oil pipe body, its characterized in that, the both ends of oil pipe body are equipped with outer thread, one end of oil pipe body is connected with double female joint, the other end of oil pipe body is connected with male female joint, the inside of oil pipe body is fixedly embedded with one inner lining pipe, the inner lining pipe is used as the anticorrosion wear layer in the oil pipe, the outside of oil pipe body is provided with outer pipe, and the annular space is formed between the outer pipe and the oil pipe body, and the annular space is filled with heat preservation material, one end of outer pipe is inserted and fixed on the male female joint, the other end of outer pipe is provided with telescopic short section, and the telescopic short section is inserted and fixed on the double female joint, the telescopic short section can realize the real time free adjustment of the outer pipe in the length direction, so as to prevent the cracking phenomenon of the oil pipe body and the outer pipe because of the temperature, the different force size makes the elongation of the oil pipe body and the outer pipe inconsistent.
[0007] Further, the outer tube is provided with an injection port, through which the heat preservation material can be injected into the annular space between the outer tube and the oil pipe body.
[0008] Further, the double female joint is provided with an upper female joint and a lower female joint, the inner top of the lower female joint is provided with a first notch, and a first sealing ring is arranged in the first notch, so that the oil pipe body and the double female joint form secondary sealing through the first sealing ring.
[0009] Further, the bottom of the lower female joint is provided with a step, and the telescopic nipple of the outer tube abuts against the step of the lower female joint; the inner wall of the step of the lower female joint is provided with a second notch, and a second sealing ring is arranged in the second notch, so that the telescopic nipple and the double female joint are sealingly connected through the second sealing ring.
[0010] Further, a plurality of centralizing centralizers are arranged between the oil pipe body and the outer tube.
[0011] Further, the upper part of the male and female joint is provided with a step, and the outer tube abuts against the step of the male and female joint.
[0012] Further, the lower part of the male and female joint is provided with an external thread, and in use, a plurality of heat insulation oil pipes can be spliced together according to the required length of the oil pipe, and in splicing, the male and female joint is screwed into the upper female joint of the double female joint of another heat insulation oil pipe as a tail pipe.
[0013] Further, the double female joint is provided with a notch for placing a storage card, and the storage card is used for storing the information of the heat insulation oil pipe.
[0014] Further, the outer tube and the telescopic nipple are in an integrated structure.
[0015] The utility model discloses simple structure, reasonable in design, through the annular space between the oil pipe body and the outer tube adds heat preservation material, can effectively prevent the liquid energy loss in oil well pipe, guarantees the temperature in the oil pipe liquid, solves the emission pollution problem of heating device in the prior art, and the utility model discloses reduce production energy consumption and cost, realize oilfield green, environmental protection production. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the structure schematic diagram of the utility model discloses;
[0017] Figure 2 It is Figure 1 A enlarged schematic diagram of the part of DETAILED DESCRIPTION
[0018] In order to better understand the purpose, function and specific design scheme of the utility model, the outer-wrapped new structure heat-insulation and heat-preservation oil pipe will be further described in detail below in combination with the drawings.
[0019] As shown in Figure 1 and Figure 2 The outer-wrapped new structure heat-insulation and heat-preservation oil pipe of the utility model comprises an oil pipe body 7, the outer periphery of both ends of the oil pipe body 7 is provided with external threads, one end of the oil pipe body 7 is connected with a double female joint 3, the other end of the oil pipe body 7 is connected with a male and female joint 9, an inner lining pipe 4 is fixedly embedded in the inside of the oil pipe body 7, the inner lining pipe 4 serves as a corrosion and wear resistant layer in the oil pipe, an outer pipe 5 is arranged outside the oil pipe body 7, the outer pipe 5 and the oil pipe body 7 have an annular space therebetween, the annular space is filled with a heat preservation material 8, one end of the outer pipe 5 is inserted and fixed on the male and female joint 9, the other end of the outer pipe 5 is provided with an expansion joint 51, the expansion joint 51 is of an integral structure with the outer pipe 5, the expansion joint 51 is inserted and fixed on the double female joint 3, and the outer pipe 5 can be freely adjusted in the length direction in real time through the expansion joint 51, so as to prevent the oil pipe body 7 and the outer pipe 5 from cracking due to different temperatures and stress sizes.
[0020] Specifically, the outer pipe 5 is provided with an injection port 52, and the heat preservation material 8 can be injected into the annular space between the outer pipe 5 and the oil pipe body 7 through the injection port 52.
[0021] The double female joint 3 is processed with an upper female joint 31 and a lower female joint 32, the inner top of the lower female joint 32 is provided with a first notch, a first sealing ring 2 is installed in the first notch, and the oil pipe body 7 and the double female joint 3 form secondary sealing through the first sealing ring 2.
[0022] The bottom of the lower female joint 32 is provided with a step, and the expansion joint 51 of the outer pipe 5 abuts on the step of the lower female joint 32. The inner wall of the lower female joint step is provided with a second notch, a second sealing ring is installed in the second notch, and the expansion joint 51 and the double female joint 3 are sealingly connected through the second sealing ring.
[0023] A plurality of centralizing central frames 6 are arranged between the oil pipe body 7 and the outer pipe 5, and the purpose of the centralizing central frames 6 is to make the outer pipe 5 and the oil pipe body 7 concentric.
[0024] The double female joint 3 is provided with a notch for placing a storage card 1, and in use, the information such as use date, oil well well number, downhole depth and wellhead temperature is stored into the storage card 1 through a card reader.
[0025] The upper part of the male and female joint 9 is provided with a step, and the outer pipe 5 abuts against the step of the male and female joint. The lower part of the male and female joint 9 is provided with an external thread, and in use, according to the required length of the oil pipe, a plurality of heat-insulating oil pipes can be spliced together for use, and in splicing, the male and female joint 9 is screwed into the upper female joint 31 of the double female joint of another heat-insulating oil pipe as a tail pipe.
[0026] The utility model discloses a heat-insulating oil pipe, which comprises an outer pipe 5, a double female joint 3 and a male and female joint 9, wherein the outer pipe 5 is connected with the double female joint 3 through a male and female joint 9.
[0027] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it still can modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.
Claims
1. A new structure of heat-insulated tubing with external coating, comprising a tubing body, characterized in that, The outer periphery of both ends of the oil pipe body is provided with external threads, one end of the oil pipe body is connected with the double female joint, the other end of the oil pipe body is connected with the male and female joint, an inner liner pipe is fixedly embedded in the inside of the oil pipe body, the inner liner pipe serves as a corrosion and wear resistant layer in the oil pipe, the outer pipe is arranged outside the oil pipe body, the annular space between the outer pipe and the oil pipe body is filled with thermal insulation material, one end of the outer pipe is inserted and fixed on the male and female joint, the other end of the outer pipe is provided with an expansion joint, the expansion joint is inserted and fixed on the double female joint, the outer pipe can be freely adjusted in the length direction through the expansion joint, so as to prevent cracking due to the inconsistent elongation of the oil pipe body and the outer pipe caused by different temperatures and stress sizes.
2. The new structure of the outer-coated insulated tubing according to claim 1, characterized in that, An injection port is arranged on the outer pipe, through which the thermal insulation material can be injected into the annular space between the outer pipe and the oil pipe body.
3. The new structure of the outer jacketed insulated tubing according to claim 1, characterized in that, An upper female joint and a lower female joint are machined on the double female joint, the inner top of the lower female joint is provided with a first notch, a first sealing ring is installed in the first notch, and the oil pipe body and the double female joint form secondary sealing through the first sealing ring.
4. The new structure of the outer jacketed insulated tubing according to claim 3, characterized in that, The bottom of the lower female joint is provided with a step, the expansion joint of the outer pipe abuts on the step of the lower female joint, the inner wall of the step of the lower female joint is provided with a second notch, a second sealing ring is installed in the second notch, and the expansion joint and the double female joint are sealingly connected through the second sealing ring.
5. The new structure of the outer jacketed insulated tubing according to claim 4, characterized in that, A plurality of centralizing stands are arranged between the oil pipe body and the outer pipe.
6. The new structure of the outer jacketed insulated tubing according to claim 5, characterized in that, The upper part of the male and female joint is provided with a step, and the outer pipe abuts on the step of the male and female joint.
7. The new structure of the outer jacketed insulated tubing according to claim 6, characterized in that: The lower part of the male and female joint is provided with external threads, in use, according to the required length of the oil pipe, a plurality of heat-insulating and heat-preservation oil pipes can be spliced together for use, when splicing, the male and female joint is screwed into the upper female joint of the double female joint of another heat-insulating and heat-preservation oil pipe as a tail pipe.
8. The new structure insulated tubing with external coating according to claim 1, characterized in that, A notch for placing a storage card is arranged on the double female joint, and the storage card is used to store the information of the heat-insulating and heat-preservation oil pipe.
9. The new structure of the outer jacketed insulated tubing of claim 1, wherein, The outer pipe and the expansion joint are of an integral structure.