Anti-wax-precipitation oil passing connector and mounting structure of anti-wax-precipitation oil passing connector in underground oil pipe
By setting an axial channel in the middle of the oil passage joint and setting multiple oil passages at an angle on the side wall, the problem of wax blockage in the downhole tubing was solved, and smooth flow and efficient extraction of crude oil were achieved.
Patent Information
- Application Number
- CN202520018095.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2035-01-06
AI Technical Summary
In existing hydraulic pumping equipment, the oil passage joints in the downhole tubing are poorly designed, causing wax components in the crude oil to accumulate at radial corners, which easily leads to wax buildup and blockage of the passage, affecting pumping efficiency.
A wax-resistant oil passage joint is designed by setting a first oil passage along the axial direction in the middle of the joint and setting multiple second oil passages at an angle on the side wall to reduce the resistance to crude oil flow and prevent wax from forming.
It effectively reduces crude oil flow resistance, prevents oil passages from being blocked by wax, and improves oil extraction efficiency.
Smart Images
Figure CN223510863U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic pumping technology, and in particular provides an anti-wax-caking oil passage joint and its installation structure in downhole tubing. Background Technology
[0002] like Figure 2 As shown, the oil passage connector of the existing hydraulic pumping equipment is installed inside the downhole tubing 4'. Its upper end is connected to the piston rod 2' of the hydraulic pumping equipment, and its lower end is connected to the sucker rod 3'. The piston rod 2' of the hydraulic pumping equipment moves up and down reciprocally, driving the sucker rod 3' to move reciprocally through the oil passage connector 1'. The reciprocating motion of the sucker rod 3' can draw crude oil from the well through the internal channel 41' of the downhole tubing, the second oil passage 12' of the oil passage connector, the first oil passage 11' of the oil passage connector, and the internal channel 21' of the piston rod of the hydraulic pumping equipment. The second oil passage 12' is arranged radially along the oil passage connector 1', and the first oil passage 11' is arranged axially along the oil passage connector 1'. However, crude oil has a complex composition, containing water, sand, wax, and natural gas. During the oil extraction process, because the second oil passage 12' is radially arranged along the oil passage joint 1', when crude oil flows from the internal passage 41' of the downhole tubing to the internal passage 21' of the piston rod of the hydraulic pumping equipment, it needs to flow at a right angle at the corner of the second oil passage 12', which results in greater resistance. This often causes wax in the crude oil to accumulate, leading to wax deposition. When more and more wax is deposited, it will block the oil passage, making it impossible to extract crude oil.
[0003] Therefore, proposing a new type of oil-sealing connector to avoid wax buildup has become an urgent problem to be solved. Utility Model Content
[0004] In view of this, the present invention provides an anti-wax-caking oil passage joint and an installation structure for the anti-wax-caking oil passage joint in downhole tubing, so as to solve the problem that existing oil passage joints are prone to waxing when used in downhole tubing.
[0005] This utility model provides an anti-wax-caking oil connector, wherein a first oil passage is provided axially in the middle part of the anti-wax-caking oil connector, and a second oil passage is provided on the side wall of the anti-wax-caking oil connector, which communicates with the first oil passage. The second oil passage is inclined toward the oil outlet of the first oil passage.
[0006] Preferably, the second oil passage is multiple and is spaced apart along the axial and circumferential directions of the anti-wax-caking oil passage joint.
[0007] Further preferably, the corner of the second oil passage is provided with a transition.
[0008] Further preferably, the anti-wax-caking oil-passing joint has internal thread structures at both ends for connecting with the piston rod and sucker rod of the hydraulic pumping equipment.
[0009] This utility model also provides an installation structure for an anti-wax-caking oil passage connector in a downhole tubing, comprising: a piston rod of a hydraulic pumping unit, a sucker rod, a downhole tubing, and the aforementioned anti-wax-caking oil passage connector. The anti-wax-caking oil passage connector is installed inside the downhole tubing, with both ends connected to the piston rod and sucker rod of the hydraulic pumping unit, respectively. The inlet of the second oil passage of the anti-wax-caking oil passage connector communicates with the internal channel of the downhole tubing, and the outlet of the second oil passage of the anti-wax-caking oil passage connector communicates with the internal channel of the piston rod of the hydraulic pumping unit through the first oil passage. The second oil passage is inclined toward the outlet of the first oil passage.
[0010] The anti-wax-caking oil passage joint and its installation structure in the downhole tubing provided by this utility model change the original second oil passage joint, which was set radially, to an inclined setting, which can greatly reduce the flow resistance of crude oil and prevent wax from forming. Attached Figure Description
[0011] Figure 1 This is a diagram showing the installation structure of the anti-wax-caking oil passage joint provided by this utility model in a downhole tubing.
[0012] Figure 2 This is a structural diagram of the installation structure of the oil passage connector in the downhole tubing in the existing technology. Detailed Implementation
[0013] The present invention will be further described below with reference to specific embodiments.
[0014] like Figure 1 As shown, this utility model provides an anti-wax-caking oil connector. The anti-wax-caking oil connector 1 has a first oil passage 11 arranged axially in the middle part, and a second oil passage 12 communicating with the first oil passage 11 is arranged on the side wall of the anti-wax-caking oil connector. The second oil passage 12 is inclined toward the oil outlet of the first oil passage 11.
[0015] This anti-wax-caking oil passage joint changes the original oil passage joint's radially arranged second oil passage to an inclined arrangement, which can greatly reduce the flow resistance of crude oil when it is installed in the downhole tubing and prevent wax formation.
[0016] As an improvement to the technical solution, the second oil passage 12 consists of multiple passages spaced apart along the axial and circumferential directions of the anti-wax-caking oil passage joint 1, such as... Figure 1As shown, the second oil passage is arranged in 4 groups along the circumference of the anti-wax oil passage joint, and each group is arranged in 3 axial channels. Compared with the prior art, the addition of the second oil passage further reduces crude oil resistance and avoids waxing.
[0017] As an improvement to the technical solution, the corner of the second oil passage 12 is designed with a transition, which further reduces crude oil resistance.
[0018] As an improvement to the technical solution, the anti-wax-caking oil connector 1 is provided with internal thread structure at both ends for connection with the piston rod 2 and sucker rod 3 of the hydraulic oil pumping equipment.
[0019] This utility model also provides an installation structure for an anti-wax-caking oil passage connector in a downhole tubing, comprising: a piston rod 2 of a hydraulic pumping unit, a sucker rod 3, a downhole tubing 4, and the aforementioned anti-wax-caking oil passage connector 1. The anti-wax-caking oil passage connector 1 is installed inside the downhole tubing 4, with both ends connected to the piston rod 2 and the sucker rod 3 of the hydraulic pumping unit, respectively. The inlet of the second oil passage 12 of the anti-wax-caking oil passage connector 1 is connected to the internal channel 41 of the downhole tubing, and the outlet of the second oil passage 12 of the anti-wax-caking oil passage connector 1 is connected to the internal channel 21 of the piston rod of the hydraulic pumping unit through the first oil passage 11. The second oil passage 12 is inclined toward the outlet of the first oil passage 11.
[0020] The installation structure of this anti-wax-caking oil passage joint in the downhole tubing, by improving the structure of the oil passage joint, can prevent the oil passage from being blocked by wax at the corners.
[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A wax-resistant oil-coating connector, characterized in that, The anti-wax-caking oil connector (1) has a first oil passage (11) arranged axially in the middle part, and a second oil passage (12) communicating with the first oil passage (11) is arranged on the side wall of the anti-wax-caking oil connector. The second oil passage (12) is inclined toward the oil outlet of the first oil passage (11).
2. The anti-wax-caking oil-passing joint according to claim 1, characterized in that, The second oil passage (12) consists of multiple passages, which are spaced apart along the axial and circumferential directions of the anti-wax-caking oil passage joint (1).
3. The anti-wax-caking oil-passing joint according to claim 1, characterized in that, The corner of the second oil passage (12) is provided with a transition.
4. The anti-wax-caking oil-passing joint according to claim 1, characterized in that, The anti-wax-caking oil connector (1) has internal threaded structures at both ends for connecting with the piston rod (2) and sucker rod (3) of the hydraulic pumping equipment.
5. An installation structure for an anti-wax-caking oil passage joint in a downhole tubing, characterized in that, include: The hydraulic pumping equipment includes a piston rod (2), a sucker rod (3), a downhole tubing (4), and an anti-wax-caking oil passage joint (1) according to any one of claims 1 to 4. The anti-wax-caking oil passage joint (1) is installed inside the downhole tubing (4) and its two ends are respectively connected to the piston rod (2) and the sucker rod (3) of the hydraulic pumping equipment. The inlet of the second oil passage (12) of the anti-wax-caking oil passage joint (1) is connected to the internal passage (41) of the downhole tubing. The outlet of the second oil passage (12) of the anti-wax-caking oil passage joint (1) is connected to the internal passage (21) of the piston rod of the hydraulic pumping equipment through the first oil passage (11). The second oil passage (12) is inclined toward the outlet of the first oil passage (11).