Oil pipe for oil and gas well construction

Abstract

The present invention relates to the technical field of oil pipes, and discloses an oil pipe for oil and gas well construction, comprising an oil pipe body for drilling and producing underwater oil fields, the oil pipe body comprising a first oil pipe and a second oil pipe installed at both ends of the first oil pipe, wherein a group of the second oil pipes has pressure relief ports on both sides thereof; a conducting unit, the conducting unit comprising an inner sliding sleeve arranged between the two groups of pressure relief ports, and a plurality of pressure plates are arranged above the inner sliding sleeve, and a group of the second oil pipes corresponding to the inner sliding sleeves are provided with a first locking ball and a second locking ball; when a ball is thrown into the oil pipe body, the steel ball enters the inclined port and blocks the inner sliding sleeve, so that the steel ball pushes the inner sliding sleeve to release the blockage of the pressure relief port. The present invention quickly opens the pressure relief channel through the ball throwing and pressurizing operation, thereby avoiding the risk of uncontrolled well kick caused by blockage of the well killing channel, allowing the pipe string to quickly relieve pressure after the packer fails, thereby avoiding wear of the packer and the oil pipe body.

Description

Technical Field

[0001] The present invention relates to the technical field of oil pipes, and more particularly to an oil pipe for oil and gas well construction. Background Art

[0002] At present, in the process of underwater oil drilling and gas well overhaul construction, the commonly used tubing string structure is mainly composed of tubing body, packer and sandblaster. Through the tubing string structure, the casing of the perforation section in the well can be checked for channeling, the injection volume can be accurately tested, or the casing above the perforation section can be pressure tested and leaked section by section. The above process is a very important core link in the construction of underwater gas wells.

[0003] During specific operations, the tubing needs to be connected to the packer. However, after the packer is released by pressure, the packer's rubber sleeve often fails to retract. This is primarily due to the prolonged immersion of the rubber sleeve in the killing fluid, where it suffers from chemical corrosion. Furthermore, the high formation temperature, the CO2 contained in the formation natural gas, and the differential pressure of the killing fluid at different well depths due to continuous gas intrusion all combine to cause the packer's rubber sleeve to undergo irreversible deformation, making it difficult to restore to its original shape and causing wear.

[0004] The packer's rubber sleeve's failure to retract directly causes the entire string to become stuck, preventing it from being raised or lowered, hindering subsequent operations. Furthermore, the abnormal state of the rubber sleeve blocks the well-killing path. If the well-killing fluid is invaded by gas, triggering a well kick, the blocked well-killing path prevents timely and effective well-killing operations. Attempting to forcefully lift the string at this point is highly likely to cause a blowout accident, posing a serious safety hazard to underwater gas well construction.

[0005] Furthermore, the abnormal deformation of the packer's rubber sleeve and its frequent movements under complex operating conditions also cause severe wear and tear on the packer's structure. On the one hand, the deformation of the rubber sleeve changes its fit with the inner wall of the casing. When the tubing moves or when well pressure fluctuates, the friction between the rubber sleeve and the inner wall of the casing increases dramatically, accelerating the wear of the rubber sleeve and the metal components of the packer. This leads to a sharp decline in the packer's sealing performance and a significant reduction in its service life.

[0006] On the other hand, the complex and changeable pressure environment at different well depths causes the packer to bear uneven pressure loads during operation, further aggravating the wear of the internal structural parts of the packer. This not only makes it difficult for the packer to perform its due functions normally, but the frequent maintenance and replacement operations also greatly increase the cost of underwater gas well construction. Summary of the Invention

[0007] The present invention provides an oil pipe for oil and gas well construction, which solves the technical problem in the related art that the packer rubber sleeve does not shrink, resulting in the entire pipe string being unable to be lifted or lowered, causing subsequent processes to be unable to proceed normally and causing serious wear on the oil pipe body and the packer itself.

[0008] The present invention discloses an oil pipe for oil and gas well construction, comprising an oil pipe body, the oil pipe body comprising a first oil pipe and a second oil pipe installed at both ends of the first oil pipe, wherein a group of the second oil pipes is provided with pressure relief ports on both sides thereof; a conduction unit, the conduction unit comprising an inner sliding sleeve arranged between the two groups of the pressure relief ports, and a plurality of pressure plates are provided above the inner sliding sleeve, and a group of the second oil pipes corresponding to the inner sliding sleeves is provided with a first locking ball and a second locking ball; when a ball is thrown into the oil pipe body, the steel ball contacts the pressure plate, controls the first locking ball to retract, and releases the limit on the inner sliding sleeve, at which time the steel ball enters the inclined port, blocks the interior of the inner sliding sleeve, and then pressurizes the interior of the oil pipe body so that the steel ball pushes the inner sliding sleeve, thereby releasing the blockage of the pressure relief port.

[0009] As a further optimization solution of the present invention, when the pressure relief port is unblocked and opened, the pressure under the rubber cylinder is discharged to the outside, so that the inside and outside are connected to form a liquid circulation channel.

[0010] As a further optimized solution of the present invention, a through opening is provided in the interior of the inner sliding sleeve and is passed through from top to bottom, and an inclined opening is provided at the top of the through opening.

[0011] As a further optimization solution of the present invention, a group of second oil pipes corresponding to the inner sliding sleeve are provided with guiding bevels inside for guiding the steel balls.

[0012] As a further optimization scheme of the present invention, multiple groups of first locking grooves and multiple groups of second locking grooves are provided on the inner sliding sleeve, the interior of the first locking groove is snap-connected with an insert block, and the insert block is fixedly connected to the first locking ball, and the second locking groove is snap-connected to the second locking ball.

[0013] As a further optimization scheme of the present invention, a first cavity is opened inside a group of second oil pipes corresponding to the inner sliding sleeve, the first locking ball is located in the first cavity, a first guide rod is slidably connected in the first cavity, the first guide rod is fixedly connected to the pressure plate, a second guide rod is provided at the end of the first guide rod away from the pressure plate, a third guide rod is installed on the first locking ball, and the third guide rod is slidably connected in the first cavity, the second guide rod and the third guide rod are fixedly connected by a connecting plate, and a first spring is provided on the outside of the third guide rod.

[0014] As a further optimization scheme of the present invention, a first inclined block and a second inclined block are provided between the first guide rod and the second guide rod, the contact surfaces of the first inclined block and the second inclined block are inclined, the first guide rod is fixedly connected to the first inclined block, and the second guide rod is fixedly connected to the second inclined block.

[0015] As a further optimization solution of the present invention, a second cavity is further provided inside a group of second oil pipes corresponding to the inner sliding sleeve, the second locking ball is located in the second cavity, and a second spring is further provided in the second cavity.

[0016] As a further optimization scheme of the present invention, a second anti-wear unit is provided inside the first oil pipe, and the second anti-wear unit includes a first filter cartridge and a second filter cartridge provided inside the first oil pipe. The first filter cartridge and the second filter cartridge are used to isolate and guide the inner sliding sleeve and the steel ball to prevent the inner sliding sleeve and the steel ball from impacting the inner wall of the first oil pipe after pressurization, causing damage to the inner wall of the first oil pipe.

[0017] As a further optimization scheme of the present invention, the first filter cartridge and the second filter cartridge filter the oil inside the oil pipe body, so that the filtered oil contacts the inner wall of the first oil pipe, thereby reducing the wear of the inner wall of the first oil pipe by impurities in the oil.

[0018] The beneficial effects of the present invention are as follows: the present invention cooperates with the conduction unit to set up the pressure relief port. When the rubber cylinder of the packer cannot shrink due to chemical corrosion, high temperature and high pressure and CO2 erosion, the pressure relief channel can be quickly opened by the ball-throwing pressurizing operation, thereby avoiding the risk of uncontrolled well blowout caused by blockage of the well-killing channel, so that the tubing string can be quickly depressurized after the packer fails, avoiding wear of the packer and the oil pipe body, and also ensuring the continuous operation of core processes such as channeling inspection and pressure testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention;

[0021] Figure 3 is a schematic diagram of the three-dimensional structure of the first anti-wear unit of the present invention;

[0022] Figure 4 It is a schematic diagram of a three-dimensional cross-sectional structure of the connection between the first oil pipe and the protective tube of the present invention;

[0023] Figure 5 is a schematic diagram of the three-dimensional structure of the second anti-wear unit of the present invention;

[0024] Figure 6 The present invention Figure 2Schematic diagram of the local structure;

[0025] Figure 7 The present invention Figure 6 A magnified view of the structure at center A;

[0026] Figure 8 The present invention Figure 6 A magnified view of the structure at point B in the middle;

[0027] Figure 9 It is a perspective three-dimensional structural diagram of the inner sliding sleeve of the present invention;

[0028] Figure 10 It is a partial structural diagram of the first locking ball, the insert block and the third guide rod of the present invention.

[0029] In the figure: 100, oil pipe body; 110, first oil pipe; 120, second oil pipe; 130, pressure relief port; 140, upper joint; 150, lower joint; 160, guide bevel; 200, first anti-wear unit; 210, protective cylinder; 220, roller; 230, annular slide rail; 300, second anti-wear unit; 310, first filter cartridge; 311, first filter hole; 320, second filter cartridge; 321, second filter hole; 400, conduction unit; 410, inner sliding sleeve; 411, inclined mouth; 412, first locking groove; 413, second locking groove; 420, pressure plate; 421, first guide rod; 422, first inclined block; 423, second inclined block; 424, second guide rod; 425, third guide rod; 426, first spring; 430, first locking ball; 431, insert block; 440, second locking ball; 450, second spring. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0031] According to the attached Figure 1 To the attached Figure 2 As shown, an oil pipe for oil and gas well construction includes an oil pipe body 100 for drilling and producing underwater oil fields. The oil pipe body 100 includes a first oil pipe 110 and second oil pipes 120 installed at both ends of the first oil pipe 110. The two sets of second oil pipes 120 are respectively installed with an upper joint 140 and a lower joint 150;

[0032] Specifically, according to the attached Figure 2As shown, pressure relief ports 130 are opened on both sides of the interior of one group of second oil pipes 120 , and the pressure inside the oil pipe body 100 is relieved through the pressure relief ports 130 , so that the inside and outside of the oil pipe body 100 are connected.

[0033] Furthermore, a conducting unit 400 is provided between the two groups of pressure relief ports 130 , and the two groups of pressure relief ports 130 are blocked by the conducting unit 400 .

[0034] It should be noted that by providing a pressure relief port 130 within the second oil pipe 120 and the associated conductive unit 400, the passage between the oil pipe body 100 and the casing can be quickly opened in the event of a packer failure. This frees the operation of the tubing string within the well from the constraints of the unretracted packer rubber sleeve. Construction personnel can flexibly adjust the tubing string position, ensuring that subsequent processes such as channeling inspection and pressure testing can proceed. This significantly improves construction efficiency and avoids delays caused by inoperable tubing strings.

[0035] This solution, through the design of the pressure relief port 130 and the conduction unit 400, promptly restores the well-killing path in the event of a packer anomaly. When gas intrusion into the well-killing fluid triggers a well kick, well-killing operations can be rapidly implemented, avoiding possible blowout accidents caused by an inability to kill the well, ensuring the safety of gas well construction, and also preventing wear on the packer connected to the tubing body 100.

[0036] In an optional embodiment, according to the attached Figure 6 To the attached Figure 8 As shown, the conduction unit 400 includes an inner sliding sleeve 410 arranged between the two groups of pressure relief ports 130. A through opening is opened in the inner sliding sleeve 410 and is connected to the upper and lower sides of the pressure relief port. An inclined opening 411 is opened at the top of the through opening, and a plurality of pressure plates 420 are provided above the inclined opening 411. A first locking ball 430 and a second locking ball 440 are provided inside a group of second oil pipes 120 corresponding to the inner sliding sleeve 410. The first locking ball 430 and the second locking ball 440 are respectively located on the upper and lower sides of the pressure relief port 130.

[0037] Specifically, when a ball is thrown into the oil pipe body 100, the steel ball contacts the pressure plate 420, controlling the first locking ball 430 to retract, thereby releasing the limit on the inner sliding sleeve 410. At this time, the steel ball enters the inclined opening 411, sealing the interior of the inner sliding sleeve 410. Subsequently, by pressurizing the interior of the oil pipe body 100, the steel ball pushes the inner sliding sleeve 410, releasing the blockage of the pressure relief port 130.

[0038] It should be noted that according to the attached Figure 9 As shown, a group of second oil pipes 120 corresponding to the inner sliding sleeve 410 are provided with guiding bevels 160 inside for guiding the steel balls.

[0039] During operation, the connected oil pipe body 100 and the sandblasting packer structure are placed in the casing of the gas well for operation.

[0040] When an abnormality occurs in the packer and the seal cannot be released, a steel ball is put into the tubing body 100 so that the steel ball fits into the inclined opening 411 at the top of the inner sliding sleeve 410. By applying pressure to the tubing body 100, as the hydraulic pressure in the tubing body 100 rises, the steel ball pushes the inner sliding sleeve 410, causing the first locking ball 430 and the second locking ball 440 to contract, thereby releasing the limit of the inner sliding sleeve 410. After the limit of the inner sliding sleeve 410 is released, the inner sliding sleeve 410 slides down inside the tubing body 100, releasing the blockage between the inner sliding sleeve 410 and the pressure relief port 130, thereby opening the casing and the interior of the tubing body 100, and allowing the liquid in the tubing body 100 to be discharged into the casing to relieve the pressure internally.

[0041] When the pressure relief port 130 is unblocked and opened, the pressure below the rubber cylinder is discharged to the outside, so that the inside and the outside are connected to form a liquid circulation channel. At this time, whether pressurizing the casing to make the liquid discharge from the oil pipe or pressurizing the oil pipe to make the liquid discharge from the casing, normal well killing operations can be carried out, eliminating the suction effect, thereby solving the problem of well killing being unable to be carried out due to gas invasion of the well killing fluid in the well.

[0042] Among them, a throttle hole is also provided in the seal, which is the existing technology; when working, the liquid flows out from the oil pipe body 100 and is discharged to the external casing from the throttle hole position, thereby forming a pressure difference between the inside and the outside, which can enable the inside of the oil pipe body 100 to work normally and the rubber sleeve to be sealed normally.

[0043] In an optional embodiment, according to the attached Figure 8 , Attachment Figure 9 and attached Figure 10 As shown, multiple groups of first locking grooves 412 and multiple groups of second locking grooves 413 are provided on the inner sliding sleeve 410, and the interior of the first locking groove 412 is snap-connected with an insert block 431, and the insert block 431 is fixedly connected to the first locking ball 430, and the second locking groove 413 is snap-connected to the second locking ball 440.

[0044] Specifically, according to the attached Figure 7As shown, a first cavity is opened inside a group of second oil pipes 120 corresponding to the inner sliding sleeve 410, and the first locking ball 430 is located in the first cavity. A first guide rod 421 is slidably connected in the first cavity, and the first guide rod 421 is fixedly connected to the pressure plate 420. A first inclined block 422 is installed at one end of the first guide rod 421 away from the pressure plate 420, and a second inclined block 423 is slidably connected to the first inclined block 422, and a second guide rod 424 is installed on the second inclined block 423. A third guide rod 425 is installed on the first locking ball 430, and the third guide rod 425 is slidably connected to the first cavity, and the second guide rod 424 and the third guide rod 425 are fixedly connected by a connecting plate. A first spring 426 is provided on the outside of the third guide rod 425, one end of the first spring 426 is fixedly connected to the first locking ball 430, and the other end of the first spring 426 is fixedly connected to the first cavity.

[0045] In addition, according to the attached Figure 8 As shown, a second cavity is further defined inside a group of second oil pipes 120 corresponding to the inner sliding sleeve 410 , a second locking ball 440 is located in the second cavity, and a second spring 450 is further disposed in the second cavity.

[0046] During operation, when a ball is thrown into the oil pipe body 100, the steel ball contacts the pressure plate 420, and the pressure plate 420 is driven downward by gravity. At the same time, the first guide rod 421 moves synchronously, so that the first inclined block 422 and the second inclined block 423 are squeezed, pushing the second guide rod 424 to move; when the second guide rod 424 moves, the third guide rod 425 is driven to move synchronously, so that the first locking ball 430 drives the insert block 431 to release the engagement connection with the first locking groove 412.

[0047] When the oil pipe body 100 is pressurized, the steel ball pushes the inner sliding sleeve 410 to move, causing the second locking groove 413 to push the second locking ball 440, causing the second locking ball 440 to retract, automatically releasing the limit on the inner sliding sleeve 410, and releasing the blockage between the inner sliding sleeve 410 and the pressure relief port 130, so that the casing and the inside of the oil pipe body 100 are connected, allowing the liquid in the oil pipe body 100 to be discharged into the casing to relieve the pressure inside.

[0048] According to the attached Figure 5As shown, a second anti-wear unit 300 is provided inside the first oil pipe 110. The second anti-wear unit 300 is provided inside the oil pipe body 100 to protect the inside of the oil pipe body 100. The second anti-wear unit 300 includes a first filter cartridge 310 and a second filter cartridge 320 provided inside the first oil pipe 110. The first filter cartridge 310 and the second filter cartridge 320 are used to isolate and guide the inner sliding sleeve 410 and the steel ball to prevent the inner sliding sleeve 410 and the steel ball from impacting the inner wall of the first oil pipe 110 after pressurization, thereby causing damage to the inner wall of the first oil pipe 110.

[0049] In an optional embodiment, a plurality of first filter holes 311 are provided on the first filter cartridge 310, and a plurality of second filter holes 321 are provided on the second filter cartridge 320. The first filter holes 311 and the second filter holes 321 are used to filter impurities in the oil. In this embodiment, the first filter cartridge 310 and the second filter cartridge 320 filter the oil inside the oil pipe body 100 so that the filtered oil can contact the inner wall of the first oil pipe 110, thereby reducing the wear of the inner wall of the first oil pipe 110 caused by impurities in the oil, and protecting the oil pipe body 100.

[0050] The invention also solves the problem that the oil inside the oil pipe body 100 often contains various impurities. These impurities, as the oil flows through the oil pipe, continuously scour and abrade the inner wall of the oil pipe body 100. Over time, this can cause the inner wall of the oil pipe to become thinner or even suffer serious damage such as perforations, affecting the normal delivery of oil and reducing the efficiency of oil extraction.

[0051] Specifically, the first filter cartridge 310 and the second filter cartridge 320 form a segmented filter cartridge, which is narrow at the top and wide at the bottom. The cross-sectional diameter of the first filter cartridge 310 is larger than the cross-sectional diameter of the second filter cartridge 320. The narrow-at-top, wide-at-bottom guide cone design achieves dynamic buffering and guidance of the inner sliding sleeve 410 and the steel ball assembly under pressure.

[0052] In specific implementation, the inner wall of the second filter cartridge 320 forms a sliding fit with the outer surface of the inner sliding sleeve 410, and the steel ball assembly performs linear sliding guided motion along the axis of the inner wall of the second filter cartridge 320. The second filter holes 321 are provided to cushion the movement of the inner sliding sleeve 410 and the steel balls after pressurization.

[0053] In an optional embodiment, according to the attached Figure 2As shown, during the lifting or lowering process, the outer wall of the tubing body 100 will also rub against the wellbore wall. To better accommodate the lifting or lowering of the tubing body 100 and the packer and reduce wear on the tubing body 100, this embodiment further includes a first anti-wear unit 200 comprising a protective sleeve 210 disposed on the exterior of the first tubing 110. The protective sleeve 210 prevents the tubing body 100 from rubbing against the wellbore wall, thereby preventing wear.

[0054] According to the attached Figure 3 and attached Figure 4 As shown, the protective cylinder 210 is provided with a plurality of column grooves, and rollers 220 are movably connected in the column grooves. When the rollers 220 come into contact with the well wall, the rollers 220 can rotate in the column grooves, thereby reducing the friction between the well wall and the protective cylinder 210, and protecting the oil pipe body 100. This not only reduces the resistance encountered by the oil pipe body 100 when moving in the well wall and reduces energy consumption, but also effectively avoids wear of the protective cylinder 210 and the oil pipe body 100 due to excessive friction, thereby extending the service life of the oil pipe body 100.

[0055] Annular grooves are symmetrically formed on the outer surface of the first oil pipe 110, and an annular guide rail 230 is slidably connected within the annular guide rail. The annular guide rail 230 is fixedly connected to the protective sleeve 210. When the oil pipe body 100 needs to be twisted within the wellbore, the annular guide groove and the annular guide rail 230 are slidably connected, allowing the first oil pipe 110 to rotate circumferentially within the protective sleeve 210. Furthermore, during the twisting process of the oil pipe body 100, the protective sleeve 210 continuously protects the oil pipe body 100, preventing direct friction and wear between the oil pipe body 100 and the wellbore wall caused by the twisting. This provides better protection for the oil pipe body 100, especially in complex wellbore conditions, such as curved or tilted wellbores.

[0056] In summary, the first anti-wear unit 200 and the second anti-wear unit 300 protect the tubing body 100 from the inside and outside, respectively, effectively reducing the wear of the tubing body 100 during use. This allows the tubing body 100 to maintain good working condition for a longer period of time, reduces the frequency of tubing body 100 replacement, improves the continuity and stability of oil drilling operations, and reduces maintenance costs. Furthermore, this reduces downtime caused by damage to the tubing body 100, improves production efficiency, and increases economic benefits.

[0057] The above describes an embodiment of this specific implementation method, but the present invention is not limited to the above specific implementation method. The above specific implementation method is merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms under the guidance of the present invention, all of which are protected by this embodiment.

Claims

1. A tubing for oil and gas well construction, characterized in that: include: An oil pipe body (100) is used for drilling and producing underwater oil fields, the oil pipe body (100) comprising a first oil pipe (110) and second oil pipes (120) installed at both ends of the first oil pipe (110), wherein a set of the second oil pipes (120) is provided with pressure relief ports (130) on both sides thereof; A conduction unit (400), the conduction unit (400) comprising an inner sliding sleeve (410) disposed between the two groups of pressure relief ports (130), a plurality of pressure plates (420) being disposed above the inner sliding sleeve (410), and a first locking ball (430) and a second locking ball (440) being disposed inside a group of second oil pipes (120) corresponding to the inner sliding sleeve (410); When a ball is thrown into the oil pipe body (100), the steel ball contacts the pressure plate (420), controlling the first locking ball (430) to retract, thereby releasing the limit on the inner sliding sleeve (410). At this time, the steel ball enters the interior of the inclined opening (411), sealing the interior of the inner sliding sleeve (410). Subsequently, by pressurizing the interior of the oil pipe body (100), the steel ball pushes the inner sliding sleeve (410), thereby releasing the blockage of the pressure relief port (130); The inner sliding sleeve (410) is provided with a plurality of first locking grooves (412) and a plurality of second locking grooves (413), the first locking grooves (412) are internally engaged with an insert block (431), and the insert block (431) is fixedly connected to the first locking ball (430), and the second locking grooves (413) are engaged with the second locking ball (440); A first cavity is provided inside a group of second oil pipes (120) corresponding to the inner sliding sleeve (410), the first locking ball (430) is located in the first cavity, a first guide rod (421) is slidably connected in the first cavity, the first guide rod (421) is fixedly connected to the pressure plate (420), a second guide rod (424) is provided at one end of the first guide rod (421) away from the pressure plate (420), a third guide rod (425) is installed on the first locking ball (430), and the third guide rod (425) is slidably connected in the first cavity, the second guide rod (424) and the third guide rod (425) are fixedly connected by a connecting plate, and a first spring (426) is provided on the outside of the third guide rod (425).

2. The oil pipe for oil and gas well construction according to claim 1, characterized in that: When the pressure relief port (130) is unblocked and opened, the pressure below the rubber cylinder is discharged to the outside, so that the inside and outside are connected to form a liquid circulation channel.

3. The oil pipe for oil and gas well construction according to claim 1, characterized in that: The inner sliding sleeve (410) is provided with a through opening extending vertically therethrough, and a top of the through opening is provided with an inclined opening (411).

4. The oil pipe for oil and gas well construction according to claim 1, characterized in that: A group of second oil pipes (120) corresponding to the inner sliding sleeve (410) is provided with guiding bevels (160) inside for guiding the steel balls.

5. The oil pipe for oil and gas well construction according to claim 1, characterized in that: A first tilting block (422) and a second tilting block (423) are provided between the first guide rod (421) and the second guide rod (424); contact surfaces of the first tilting block (422) and the second tilting block (423) are inclined; the first guide rod (421) is fixedly connected to the first tilting block (422); and the second guide rod (424) is fixedly connected to the second tilting block (423).

6. The oil pipe for oil and gas well construction according to claim 1, characterized in that: A second cavity is also provided inside a group of second oil pipes (120) corresponding to the inner sliding sleeve (410), the second locking ball (440) is located in the second cavity, and a second spring (450) is also provided in the second cavity.

7. The oil pipe for oil and gas well construction according to claim 1, characterized in that: A second anti-wear unit (300) is provided inside the first oil pipe (110), and the second anti-wear unit (300) includes a first filter cartridge (310) and a second filter cartridge (320) provided inside the first oil pipe (110). The first filter cartridge (310) and the second filter cartridge (320) are used to isolate and guide the inner sliding sleeve (410) and the steel ball to prevent the inner sliding sleeve (410) and the steel ball from impacting the inner wall of the first oil pipe (110) after pressurization, thereby causing damage to the inner wall of the first oil pipe (110).

8. The oil pipe for oil and gas well construction according to claim 7, characterized in that: The first filter cartridge (310) and the second filter cartridge (320) filter the oil inside the oil pipe body (100), so that the filtered oil contacts the inner wall of the first oil pipe (110), thereby reducing the wear of the inner wall of the first oil pipe (110) by impurities in the oil.

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