Circulating lubrication system for power head of inclined well drilling rig

Abstract

This utility model relates to a circulating lubrication system for a power head of an inclined well drilling rig. The power head includes a housing, a first motor, a drive gear, a main shaft, and a driven gear. The main shaft is rotatably connected to a sleeve on the housing via a bearing assembly. An end cap is provided at the end of the sleeve, and an oil seal is provided between the end cap and the bearing assembly. The system also includes a second motor, a hydraulic gear pump, a main oil supply pipe, a secondary oil supply pipe, and a return oil pipe. The hydraulic gear pump is connected to the output shaft of the second motor. Both ends of the main oil supply pipe are connected to the hydraulic gear pump and a position on the sleeve near the bearing assembly, respectively. Both ends of the secondary oil supply pipe are connected to the main oil supply pipe and a position on the end cap near the oil seal, respectively. Both ends of the return oil pipe are connected to the housing and the hydraulic gear pump, respectively. This utility model incorporates a circulating lubrication system on the power head, which can extract lubricating oil accumulated in the lower part of the housing and supply it to the upper oil seal and bearing assembly, providing lubrication and cooling, and extending service life.

Description

Technical Field

[0001] This utility model relates to inclined well drilling rigs, specifically to a circulating lubrication system for the power head of an inclined well drilling rig. Background Technology

[0002] An inclined well drilling rig is a specialized drilling equipment used in the petroleum industry, primarily for carrying out inclined well drilling operations.

[0003] Inclined well drilling rigs typically drill at large angles. Therefore, when the power head of the inclined well drilling rig is working at a large angle or vertically, the power head located on the drill frame is also in an inclined posture. The bearing assembly of the spindle located in front of and behind the power head housing will only have lubricating oil flowing through the lower bearing assembly and oil seal under the action of gravity. The oil seal and bearing assembly located above will not have lubricating oil flowing through them. Therefore, they are in a dry grinding condition during operation, resulting in severe wear and heat generation, which greatly reduces the service life of the upper oil seal and bearing. Utility Model Content

[0004] The purpose of this utility model is:

[0005] Design a circulating lubrication system for the power head of an inclined well drilling rig. The circulating lubrication system is set on the power head to extract the lubricating oil accumulated in the lower part of the power head housing and supply it to the oil seal and bearing assembly located above. This allows the lubricating oil to flow through the oil seal and bearing assembly located above, providing lubrication and cooling, and extending service life.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A circulating lubrication system for a power head of a deviated well drilling rig is applied to the power head. The power head includes a housing, a first motor, a drive gear, a main shaft, and a driven gear. The main shaft is rotatably connected to a sleeve on the housing via a bearing assembly. An end cap is provided at the end of the sleeve, and an oil seal is provided between the end cap and the bearing assembly. The drive gear is connected to the output shaft of the first motor, and the driven gear is coaxially connected to the main shaft, meshing with the driven gear. The system also includes a second motor, a hydraulic gear pump, a main oil supply pipe, a secondary oil supply pipe, and a return oil pipe. The second motor is located on the housing, and the hydraulic gear pump is connected to the output shaft of the second motor. The two ends of the main oil supply pipe are connected to the hydraulic gear pump and a position on the sleeve near the bearing assembly, respectively. The two ends of the secondary oil supply pipe are connected to the main oil supply pipe and a position on the end cap near the oil seal, respectively. The two ends of the return oil pipe are connected to the housing and the hydraulic gear pump, respectively.

[0008] Furthermore, the return oil pipe is detachably connected to the housing via a third connector; the third connector communicates with the interior of the housing and is located on the side of the housing near the bottom.

[0009] Furthermore, the third connector is located on the side of the housing near the output end of the main shaft; the oil return pipe is a flexible hose.

[0010] Furthermore, the main oil supply pipe is detachably connected to the sleeve via a first connector, and the first connector communicates with the inside of the sleeve so that the lubricating oil supplied by the main oil supply pipe can reach the bearing assembly through the sleeve.

[0011] Furthermore, the auxiliary oil supply pipe is connected to the main oil supply pipe near the first connector. The auxiliary oil supply pipe is detachably connected to the end cap via a second connector, which communicates with the inside of the end cap, so that the lubricating oil supplied by the auxiliary oil supply pipe can reach the oil seal through the end cap.

[0012] Furthermore, the hydraulic oil supplied to the bearing assembly and the oil seal can flow into the housing; both the main oil supply pipe and the auxiliary oil supply pipe are high-pressure oil pipes.

[0013] Furthermore, a pinion shaft is provided on the output shaft of the second motor, and the pinion shaft is connected to the input end of the hydraulic gear pump; the hydraulic gear pump is located on the outer side of the housing.

[0014] The beneficial effects of this utility model are as follows:

[0015] A circulating lubrication system for a deviated well drilling rig power head is provided. The system utilizes a second motor, a pinion shaft, a hydraulic gear pump, a main oil supply pipe, a secondary oil supply pipe, and a return oil pipe. The second motor drives the hydraulic gear pump via the pinion shaft, which extracts lubricating oil accumulated in the lower part of the power head's housing via the return oil pipe. This lubricating oil is then supplied to the upper oil seals and bearing assemblies via the main and secondary oil supply pipes. This allows the lubricating oil to flow through the upper oil seals and bearing assemblies, creating a dynamic circulation that provides lubrication and cooling, reduces friction, minimizes wear, and extends service life. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a circulating lubrication system for a power head of an inclined well drilling rig according to the present invention.

[0017] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective.

[0018] Figure 3 for Figure 1 A schematic diagram of the structure shown from another perspective.

[0019] Figure 4 for Figure 1 Side view of the structure shown.

[0020] Figure 5 for Figure 1A partial structural diagram of the structure shown.

[0021] Figure 6 for Figure 5 A schematic diagram of the structure shown from another perspective.

[0022] Figure 7 This is a schematic diagram of the spindle drive structure of a circulating lubrication system for a deviated well drilling rig power head according to the present invention.

[0023] The attached figures are labeled as follows:

[0024] 1. Housing; 10. Main shaft; 11. Bearing assembly; 12. Oil seal; 13. Driven gear; 14. Sleeve; 15. End cover;

[0025] 2. First motor; 3. Drive gear; 4. Second motor; 5. Pinion shaft; 6. Hydraulic gear pump; 7. Main oil supply pipe; 71. First connector; 8. Auxiliary oil supply pipe; 81. Second connector; 9. Return oil pipe; 91. Third connector. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0027] refer to Figures 1 to 7 A circulating lubrication system for a power head of an inclined well drilling rig is applied to the power head, which includes a housing 1, a first motor 2, a drive gear 3, a main shaft 10, and a driven gear 13; the power head is used to drive the rotation and forward and backward movement of the drill pipe.

[0028] The spindle 10 is rotatably connected to the sleeve 14 on the housing 1 via the bearing assembly 11. The spindle 10 is used to connect and drive the drill rod. The bearing assembly 11 is used to reduce rotational friction. An end cap 15 is provided at the end of the sleeve 14. An oil seal 12 is provided between the end cap 15 and the bearing assembly 11. The oil seal 12 is used to prevent lubricating oil from leaking from the end cap 15.

[0029] The drive gear 3 is connected to the output shaft of the first motor 2, and the driven gear 13 is coaxially connected to the main shaft 10. The drive gear 3 and the driven gear 13 mesh with each other. The first motor 2 is used to drive the drive gear 3 to rotate, and the drive gear 3 can drive the driven gear 13 to rotate, thereby realizing the rotation of the main shaft 10.

[0030] The aforementioned deviated well drilling rig power head circulating lubrication system also includes a second motor 4, a hydraulic gear pump 6, a main oil supply pipe 7, an auxiliary oil supply pipe 8, and a return oil pipe 9; the main oil supply pipe 7, the auxiliary oil supply pipe 8, and the return oil pipe 9 are all used to transport lubricating oil.

[0031] The second motor 4 is located on the housing 1, and the hydraulic gear pump 6 is connected to the output shaft of the second motor 4; the second motor 4 is used to drive the hydraulic gear pump 6 to operate, thereby realizing the supply of lubricating oil.

[0032] The two ends of the main oil supply pipe 7 are connected to the hydraulic gear pump 6 and the position on the sleeve 14 near the bearing assembly 11, respectively; the main oil supply pipe 7 is used to deliver the lubricating oil supplied by the hydraulic gear pump 6 to the bearing assembly 11 inside the sleeve 14.

[0033] The two ends of the auxiliary oil supply pipe 8 are connected to the main oil supply pipe 7 and the end cap 15 near the oil seal 12, respectively; the auxiliary oil supply pipe 8 is used to transport part of the lubricating oil in the main oil supply pipe 7 to the oil seal 12 in the end cap 15.

[0034] The two ends of the return oil pipe 9 are connected to the housing 1 and the hydraulic gear pump 6 respectively. The return oil pipe 9 is used to draw the lubricating oil in the housing 1 to the hydraulic gear pump 6.

[0035] The return oil pipe 9 is detachably connected to the housing 1 via the third connector 91; the third connector 91 is connected to the inside of the housing 1 and is located on the side of the housing 1 near the bottom. When the inclined well drilling rig is operating, the drill frame tilts, and the lubricating oil in the housing 1 of the power head gathers at the bottom of the housing 1 near the third connector 91 under the action of gravity.

[0036] The third connector 91 is located on the side of the housing 1 near the output end of the main spindle 10; the return oil pipe 9 is a flexible hose that can be wrapped around the outside of the housing 1.

[0037] The main oil supply pipe 7 is detachably connected to the sleeve 14 via the first connector 71. The first connector 71 communicates with the inside of the sleeve 14 so that the lubricating oil supplied by the main oil supply pipe 7 can reach the bearing assembly 11 through the sleeve 14, thereby achieving lubrication and cooling of the bearing assembly 11.

[0038] The auxiliary oil supply pipe 8 is connected to the main oil supply pipe 7 near the first connector 71. The auxiliary oil supply pipe 8 is detachably connected to the end cap 15 through the second connector 81. The second connector 81 is internally connected to the end cap 15 so that the lubricating oil supplied by the auxiliary oil supply pipe 8 can reach the oil seal 12 through the end cap 15 to achieve lubrication and cooling of the oil seal 12.

[0039] The auxiliary oil supply pipe 8 can be connected to the main oil supply pipe 7 via a tee pipe.

[0040] The hydraulic oil supplied to the bearing assembly 11 and the oil seal 12 can flow into the housing 1 through the gap between the oil seal 12 and the bearing assembly 11 and the gap at the ball of the bearing assembly 11 to achieve circulation; the main oil supply pipe 7 and the auxiliary oil supply pipe 8 are both high-pressure oil pipes that can withstand high-pressure lubricating oil and can be wrapped around the outside of the housing 1.

[0041] A pinion shaft 5 is provided on the output shaft of the second motor 4. The pinion shaft 5 is connected to the input end of the hydraulic gear pump 6 and is used for transmission. The hydraulic gear pump 6 is located on the outer side of the housing 1.

[0042] The working principle of this utility model is as follows:

[0043] When the inclined well drilling rig is working, the drill frame is tilted at a specific angle relative to the ground, and the power head housing 1 tilts with the drill frame, with the output end of the spindle 10 tilting towards the work area on the ground. At this time, the lubricating oil in the housing 1 will flow to the bottom of the side wall of the housing 1 near the output end of the spindle 10 under the action of gravity. The lubricating oil located here can be drawn in by the third connector 91 of the return oil pipe 9.

[0044] The first motor 2 drives the drive gear 3 to rotate, and the drive gear 3 drives the driven gear 13 to rotate, thereby realizing the rotation of the main shaft 10.

[0045] The second motor 4 drives the pinion shaft 5 to rotate, which in turn drives the input end of the hydraulic gear pump 6 to rotate. This allows the hydraulic gear pump 6 to generate negative pressure, thereby drawing the lubricating oil from the housing 1 through the return oil pipe 9, and simultaneously pressurizing the lubricating oil to supply it from the main oil supply pipe 7.

[0046] Most of the lubricating oil in the main oil supply pipe 7 enters the bearing assembly 11 in the sleeve 14 through the first connector 71 to lubricate and cool the inner ring, balls and outer ring of the multiple bearings in the bearing assembly 11.

[0047] A small portion of the lubricating oil in the main oil supply pipe 7 enters the oil seal 12 in the end cap 15 through the second connector 81 to lubricate and cool the oil seal 12.

[0048] The lubricating oil flowing through the oil seal 12 and the bearing assembly 11 can flow back into the housing 1 through the gap, and can then be drawn back into the oil return pipe 9 to form a circulating lubrication.

[0049] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. A circulating lubrication system for a power head of a deviated well drilling rig, applied to a power head, the power head comprising a housing (1), a first motor (2), a drive gear (3), a main shaft (10), and a driven gear (13); the main shaft (10) is rotatably connected to a sleeve (14) on the housing (1) via a bearing assembly (11), the end of the sleeve (14) is provided with an end cap (15), and an oil seal (12) is provided between the end cap (15) and the bearing assembly (11); the drive gear (3) is connected to the output shaft of the first motor (2), the driven gear (13) is coaxially connected to the main shaft (10), and the drive gear (3) meshes with the driven gear (13); characterized in that: It also includes a second motor (4), a hydraulic gear pump (6), a main oil supply pipe (7), an auxiliary oil supply pipe (8), and a return oil pipe (9); the second motor (4) is located on the housing (1), and the hydraulic gear pump (6) is connected to the output shaft of the second motor (4); the two ends of the main oil supply pipe (7) are respectively connected to the hydraulic gear pump (6) and the sleeve (14) near the bearing assembly (11); the two ends of the auxiliary oil supply pipe (8) are respectively connected to the main oil supply pipe (7) and the end cap (15) near the oil seal (12); the two ends of the return oil pipe (9) are respectively connected to the housing (1) and the hydraulic gear pump (6).

2. The circulating lubrication system for the power head of a deviated well drilling rig according to claim 1, characterized in that: The return oil pipe (9) is detachably connected to the housing (1) via a third connector (91); the third connector (91) is connected to the inside of the housing (1), and the third connector (91) is located on the side of the housing (1) near the bottom.

3. The circulating lubrication system for the power head of a deviated well drilling rig according to claim 2, characterized in that: The third connector (91) is located on the side of the housing (1) near the output end of the main shaft (10); the return oil pipe (9) is a flexible hose.

4. The circulating lubrication system for the power head of a deviated well drilling rig according to claim 3, characterized in that: The main oil supply pipe (7) is detachably connected to the sleeve (14) through the first connector (71). The first connector (71) is in communication with the inside of the sleeve (14) so ​​that the lubricating oil supplied by the main oil supply pipe (7) can reach the bearing assembly (11) through the sleeve (14).

5. The circulating lubrication system for the power head of a deviated well drilling rig according to claim 4, characterized in that: The auxiliary oil supply pipe (8) is connected to the main oil supply pipe (7) near the first connector (71). The auxiliary oil supply pipe (8) is detachably connected to the end cap (15) through the second connector (81). The second connector (81) is internally connected to the end cap (15) so that the lubricating oil supplied by the auxiliary oil supply pipe (8) can reach the oil seal (12) through the end cap (15).

6. The circulating lubrication system for the power head of a deviated well drilling rig according to claim 5, characterized in that: The hydraulic oil supplied to the bearing assembly (11) and the oil seal (12) can flow into the housing (1); the main oil supply pipe (7) and the auxiliary oil supply pipe (8) are both high-pressure oil pipes.

7. A circulating lubrication system for a deviated well drilling rig power head according to any one of claims 1-6, characterized in that: The output shaft of the second motor (4) is provided with a pinion shaft (5), which is connected to the input end of the hydraulic gear pump (6); the hydraulic gear pump (6) is located on the outer side of the housing (1).

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