Efficient heat insulation oil casing coupling

Abstract

The utility model relates to the technical field of oil casing couplings, in particular to an efficient heat insulation oil casing coupling which comprises a connecting pipe, a plurality of first supporting seats which are arranged at intervals are installed on the outer walls of the two ends of the connecting pipe, the first supporting seats are arranged in the radial direction of the connecting pipe, and first through grooves are formed in the ends of the first supporting seats. A screw rod is arranged in the first through groove; annular fixing seats are arranged at the two ends of the connecting pipe, the fixing seats and the connecting pipe are coaxially arranged, a plurality of second supporting seats are installed on the outer walls of the fixing seats, the second supporting seats correspond to the first supporting seats one to one, and second through grooves are formed in the ends of the second supporting seats. When the efficient heat-insulating oil casing coupling is used, the screws are arranged around the outer side of the connecting pipe at intervals, and the screws are additionally arranged between the connecting pipe and an oil casing for supporting, so that the stress intensity after the connecting pipe and the oil casing are connected is improved, and the stable connection between the connecting pipe and the oil casing is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of oil casing couplings, in particular to an oil casing coupling with high efficiency and heat insulation. Background Art

[0002] Oil casing is a steel pipe used to support the wall of oil and gas wells to ensure the normal operation of the entire oil well during the drilling process and after completion. Oil casing is divided into single-layer oil pipe and double-layer oil pipe. Among them, double-layer oil pipe refers to the oil pipe with different outer and inner layers. The outer layer is usually alloy steel and the inner layer is non-abrasive plastic. This structure can better protect the inside of the oil pipe from wear and corrosion and extend the service life of the oil pipe.

[0003] Because the oil casing is mostly multi-section connection, when installing the oil casing, it is necessary to use casing couplings to connect two adjacent oil casings, and the existing casing couplings and the oil casing are mostly connected by threaded connection. However, no matter which connection method is used, the stress strength of the connection position is always not as high as the stress strength of the overall oil casing itself. In particular, when laying the oil casing, it is still necessary to set supporting equipment on the oil casing, and the supporting equipment is always arranged at multiple intervals, and the supporting height of the supporting equipment is always deviated due to a series of factors such as the flatness of the ground, so that the gravity of the oil casing is very easy to act on the connection end between it and the casing coupling, which is easy to cause wear and damage to the connection end of the oil casing and the casing coupling during long-term use, thereby affecting the use of the oil casing. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings in the prior art and proposes a highly efficient heat-insulating oil casing coupling.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: designing an efficient heat-insulating oil casing coupling, comprising a connecting pipe, on the outer walls of both ends of the connecting pipe are installed a plurality of first support seats arranged at intervals, the first support seats are arranged along the radial direction of the connecting pipe, and a first through groove is opened at the end of the first support seat, and a screw is built in the first through groove;

[0006] An annular fixing seat is provided at both ends of the connecting pipe, the fixing seat is coaxially arranged with the connecting pipe, and a plurality of second supporting seats are installed on the outer wall of the fixing seat, the second supporting seats correspond to the first supporting seats one by one, and a second through groove is opened on the end of the second supporting seat, wherein the screw rod is correspondingly placed in the second through groove;

[0007] Both sides of each first support seat are provided with a first nut, which is threadedly connected to the screw rod, and both sides of each second support seat are provided with a second nut, which is threadedly connected to the screw rod.

[0008] Preferably, connecting sleeves are rotatably connected to both ends of the connecting pipe, the connecting sleeves are coaxially corresponding to the connecting pipe, and a threaded groove for connecting to the oil casing is provided on the inner wall of the connecting sleeve.

[0009] Preferably, a sealing ring is provided between the connecting pipe and the connecting sleeve, and the sealing ring is fixed on the inner wall of the connecting pipe.

[0010] Preferably, the first through groove penetrates one end of the first support seat away from the connecting pipe, and the second through groove penetrates one end of the second support seat away from the fixing seat.

[0011] Preferably, the fixing seat includes two coaxial corresponding arc plates, the second supporting seat is fixed on the outer wall of the arc plate, a fixing ear is connected to the end of the arc plate, and the fixing ears on the two arc plates are connected correspondingly by bolts.

[0012] Preferably, a plurality of reinforcing strips arranged at intervals are installed on the inner wall of the arc-shaped plate, and the reinforcing strips are elastic rubber strips.

[0013] Preferably, washers are provided on both sides of the first support seat and on both sides of the second support seat.

[0014] The design scheme proposed by the utility model has the following beneficial effects during application:

[0015] 1. The highly efficient heat-insulating oil casing coupling is arranged at intervals around the outer side of the connecting pipe by multiple screws. After the fixing seat is fixed on the oil casing, multiple screws are added between the connecting pipe and the oil casing to support the connecting pipe, thereby improving the stress strength after the connection between the connecting pipe and the oil casing, and ensuring the stable connection between the connecting pipe and the oil casing.

[0016] 2. The highly efficient heat-insulating oil casing coupling is connected by rotating the connecting sleeve on the connecting pipe, so that when the connecting pipe is connected to the oil casing, only the connecting sleeve needs to be rotated to complete the connection between the connecting pipe and the oil casing, without rotating the entire oil casing, thereby improving the convenience of connecting the connecting pipe and the oil casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the connecting pipe of the utility model;

[0019] Figure 3 This is a structural diagram of the fixing seat of the utility model;

[0020] Figure 4 It is a side view of the utility model.

[0021] In the figure: 1. connecting pipe; 2. connecting sleeve; 3. threaded groove; 4. sealing ring; 5. first supporting seat; 6. first through groove; 7. first nut; 8. screw; 9. arc plate; 10. fixing ear; 11. second supporting seat; 12. second through groove; 13. second nut; 14. reinforcement strip. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-Figure 4 A highly efficient heat-insulating oil casing coupling comprises a connecting pipe 1, at both ends of which connecting sleeves 2 are rotatably connected, the connecting sleeve 2 is coaxially corresponding to the connecting pipe 1, and a threaded groove 3 for connecting with the oil casing is provided on the inner wall of the connecting sleeve 2. In actual use, a threaded protrusion corresponding to the threaded groove 3 is provided at the end of the oil casing, so that the oil casing can be connected to the connecting sleeve 2, and the connecting sleeve 2 is rotated to connect the oil casing to the connecting sleeve 2, so that when the oil casing is connected to the connecting pipe 1, the connection between the connecting pipe 1 and the oil casing can be completed without rotating the connecting pipe 1 or the oil casing, thereby avoiding delays in installation progress due to excessive length and weight of the oil casing.

[0024] In order to ensure the sealing performance of the connecting pipe 1 after being connected to the oil casing, a sealing ring 4 is provided between the connecting pipe 1 and the connecting sleeve 2. The sealing ring 4 is fixed on the inner wall of the connecting pipe 1. Therefore, after the oil casing is extended into the connecting sleeve 2, the end of the oil casing will abut against the sealing ring 4, thereby achieving the sealing performance of the connection between the connecting pipe 1 and the oil casing.

[0025] like Figure 1 As shown, a plurality of first support seats 5 arranged at intervals are installed on the outer walls of both ends of the connecting pipe 1. The first support seats 5 are arranged along the radial direction of the connecting pipe 1, and a first through groove 6 is opened at the end of the first support seat 5. A screw 8 is built in the first through groove 6. A first nut 7 is provided on both sides of each first support seat 5. The first nut 7 is threadedly connected to the screw 8, so that the screw 8 can be fastened to the first support seat 5;

[0026] An annular fixing seat is provided at both ends of the connecting tube 1, the fixing seat is coaxially arranged with the connecting tube 1, and a plurality of second supporting seats 11 are installed on the outer wall of the fixing seat, the second supporting seats 11 correspond one to one with the first supporting seats 5, and a second through groove 12 is opened on the end of the second supporting seat 11, wherein the screw 8 is correspondingly placed in the second through groove 12, and a second nut 13 is provided on both sides of each second supporting seat 11, the second nut 13 is threadedly connected with the screw 8, after the second nut 13 is rotated to press it against the second supporting seat 11, the screw 8 placed in the second through groove 12 can be tightened, and the support connection between the connecting tube 1 and the fixing seat at multiple positions can be ensured to ensure the stability between the connecting tube 1 and the fixing seat.

[0027] Specifically, Figure 1 and Figure 3 As shown, the fixing seat includes two coaxial corresponding arc plates 9, the second support seat 11 is fixed on the outer wall of the arc plate 9, and a fixing ear 10 is connected to the end of the arc plate 9. The fixing ears 10 on the two arc plates 9 are connected by bolts. After the oil casing and the connecting pipe 1 are connected, the two arc plates 9 can be taken and clamped and installed on the oil casing, and then the bolts are passed through the fixing ears 10 to fasten the arc plates 9 to the oil casing. Then, because the first through groove 6 penetrates the end of the first support seat 5 away from the connecting pipe 1, and the second through groove 12 penetrates the second support seat 1 1 is away from the fixing seat, the screw rod 8 can be taken out from the opening of the through groove that passes through the support seat and placed in the through groove, and then the nuts on both sides of the support seat are twisted to tightly press the nuts against the support seat, so as to fix the screw rod 8 in the through groove, thereby adding an additional support connection between the connecting pipe 1 and the oil casing. When torsional stress occurs between the connecting pipe 1 and the oil casing, the force can be applied to the screw rod 8 and shared by multiple screw rods 8, thereby protecting the connection position between the connecting pipe 1 and the oil casing and ensuring the connection strength between the connecting pipe 1 and the oil casing.

[0028] Furthermore, washers are provided on both sides of the first support seat 5 and both sides of the second support seat 11 to enhance the fastening strength of the nut against the side surfaces of the support seats.

[0029] It should be noted that if Figure 1 and Figure 3 As shown, a plurality of spaced reinforcement strips 14 are installed on the inner wall of the arc plate 9. The reinforcement strips 14 are elastic rubber strips, which make the arc plate 9 more firmly fixed on the oil casing, thereby improving the stability of the arc plate 9 on the oil casing, so as to further improve the connection strength between the connecting pipe 1 and the oil casing.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An efficient heat-insulating oil casing coupling, characterized in that: The invention comprises a connecting pipe (1), on the outer walls of both ends of the connecting pipe (1) are installed a plurality of first support seats (5) arranged at intervals, the first support seats (5) are arranged along the radial direction of the connecting pipe (1), and a first through groove (6) is opened at the end of the first support seat (5), and a screw (8) is built in the first through groove (6); An annular fixing seat is provided at both ends of the connecting pipe (1), the fixing seat is coaxially arranged with the connecting pipe (1), and a plurality of second supporting seats (11) are installed on the outer wall of the fixing seat, the second supporting seats (11) correspond to the first supporting seats (5) one by one, and a second through groove (12) is provided at the end of the second supporting seat (11), wherein the screw rod (8) is correspondingly placed in the second through groove (12); A first nut (7) is provided on both sides of each first support seat (5), and the first nut (7) is threadedly connected to the screw rod (8), while a second nut (13) is provided on both sides of each second support seat (11), and the second nut (13) is threadedly connected to the screw rod (8).

2. The highly efficient heat-insulating oil casing coupling according to claim 1, characterized in that: Connecting sleeves (2) are rotatably connected at both ends of the connecting pipe (1); the connecting sleeve (2) corresponds to the connecting pipe (1) coaxially, and a threaded groove (3) for connecting to the oil casing is provided on the inner wall of the connecting sleeve (2).

3. The highly efficient heat-insulating oil casing coupling according to claim 2, characterized in that: A sealing ring (4) is provided between the connecting pipe (1) and the connecting sleeve (2), and the sealing ring (4) is fixed on the inner wall of the connecting pipe (1).

4. The highly efficient heat-insulating oil casing coupling according to claim 1, characterized in that: The first through groove (6) penetrates through an end of the first support seat (5) away from the connecting pipe (1), and the second through groove (12) penetrates through an end of the second support seat (11) away from the fixing seat.

5. The highly efficient heat-insulating oil casing coupling according to claim 1, characterized in that: The fixing seat comprises two coaxial corresponding arc plates (9), the second supporting seat (11) is fixed on the outer wall of the arc plate (9), a fixing ear (10) is connected to the end of the arc plate (9), and the fixing ears (10) on the two arc plates (9) are connected correspondingly by bolts.

6. The highly efficient heat-insulating oil casing coupling according to claim 5, characterized in that: A plurality of reinforcing strips (14) arranged at intervals are installed on the inner wall of the arc-shaped plate (9), and the reinforcing strips (14) are elastic rubber strips.

7. The highly efficient heat-insulating oil casing coupling according to claim 1, characterized in that: Washers are provided on both sides of the first support seat (5) and on both sides of the second support seat (11).

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