CN220226699U - Top drive spindle device with sealing structure - Google Patents

Abstract

The utility model belongs to the technical field of sealing structures, and particularly relates to a top drive spindle device with a sealing structure. The device comprises a sealing structure, wherein the sealing structure is sleeved outside the main shaft; the sealing structure comprises a mud blocking flange, a sealing bottom ring and a sealing ring, wherein the sealing ring is connected with the sealing bottom ring and is positioned in a groove formed by the vertical part, the thrust flange and the bell jar, and the sealing ring is higher than a bolt column of the sealing bottom ring; the lower end wall circumference of fender mud flange is provided with the fixed orifices that corresponds with the bolt post, wears to locate the fixed orifices and stretches into the bolt post and fix in place after, and lower end wall and sealed end ring exert extrusion force to the sealing ring and make sealing ring and the inner wall subsides of bell jar tightly seal the recess. Therefore, the device utilizes the mud blocking flange and the sealing bottom ring to press each other, so that the sealing ring is deformed to be tightly attached to the inner wall of the bell jar, and the groove is sealed. The slurry accumulated in the bell jar is prevented from entering the annular lubricating oil cavity to be in direct contact with the oil seal, the service life of the oil seal is ensured, and the slurry is also ensured not to enter the gear box.

Description

Top drive spindle device with sealing structure

Technical Field

The utility model belongs to the technical field of sealing structures, and particularly relates to a top drive spindle device with a sealing structure.

Background

The top drive drilling device is capable of directly rotating a drill rod from the upper space of a derrick, feeding the drill rod downwards along a special guide rail, and completing various drilling operations such as rotary drilling of the drill rod, circulating drilling fluid, connecting a stand column, screwing and unscrewing, chamfering and the like. In the drilling operation, the top drive provides torque, rotation speed and control thereof for the underground drilling tool, so that the capability and efficiency of the drilling operation are remarkably improved, and the top drive becomes an important device for ensuring the drilling operation efficiency and operation safety of petroleum and natural gas.

The upper end of the top drive main shaft mainly comprises the upper end of the main shaft, a bell jar and a flushing pipe device. The flushing pipe device is arranged in the bell jar at the upper end of the main shaft and is a channel for high-pressure large-displacement slurry during drilling operation. The normally leakage of the washpipe device or the thorny leakage when losing efficacy all can cause mud to pile up in the bell jar, and mud has stronger corrosiveness to materials such as metal, and the main shaft upper end structure is easily damaged and gets into the gear box, causes top drive equipment trouble and maintenance, will seriously influence oil and gas drilling operation safety and efficiency.

Disclosure of Invention

First, the technical problem to be solved

In order to solve the problems in the prior art, the utility model provides a top drive main shaft device with a sealing structure, so that the technical problem that slurry enters a gear box to cause faults of top drive equipment is solved.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps:

the utility model provides a top drive main shaft device with a sealing structure, which comprises a main shaft, a thrust flange, a mud baffle ring and a bell jar, wherein the upper end of the main shaft extends upwards from the thrust flange; the sealing structure comprises a mud blocking flange, a sealing bottom ring and a sealing ring, wherein a plurality of bolt columns are arranged on the upper surface of the sealing bottom ring, a plurality of through holes corresponding to the bolt columns are arranged on the sealing ring, the sealing ring is sleeved on the bolt columns in a one-to-one correspondence manner through the through holes, is connected with the sealing bottom ring and is positioned in a groove formed by the vertical part, the thrust flange and the bell jar, and the sealing ring is higher than the bolt columns; the mud blocking flange is sleeved on the outer side of the main shaft, a fixing hole corresponding to the bolt column is formed in the circumference of the lower end wall of the mud blocking flange, the fixing piece penetrates through the fixing hole and stretches into the bolt column to be fixed in place, and the lower end wall and the sealing bottom ring apply extrusion force to the sealing ring to enable the sealing ring to be tightly attached to the inner wall of the bell jar to seal the groove.

Further, the lower end wall is higher than the base.

Further, the thrust flange is arranged on the gear box, and the upper end of the main shaft sequentially extends upwards from the gear box cover of the gear box and the thrust flange; the lower end of the main shaft extends out of the lower end of the gear box, and the lower end of the main shaft can be connected with a downhole drilling tool.

Further, the dustproof seal is sleeved on the mud blocking ring, and the lower end of the dustproof seal is contacted with the thrust flange so as to shield a gap between the vertical part and the thrust flange.

Further, the device also comprises a flushing pipe device, and the upper end of the main shaft is connected with the flushing pipe device through a lower nut.

Further, the sealing structure also comprises a mud umbrella, the mud umbrella is positioned between the flushing pipe device and the mud blocking flange, and the mud umbrella comprises a vertical part and an umbrella part which are connected; a plurality of grooves are circumferentially arranged on the side wall surface of the lower nut, a plurality of protrusions matched with the grooves are arranged on the inner side of the vertical part, and the protrusions are aligned with the grooves and sleeved on the outer side of the lower nut; the umbrella part covers the mud-stopping flange below.

Further, a hose clamp is sleeved on the circumference of the protrusion alignment groove at the outer side of the mud umbrella.

Further, the flushing pipe device, the mud umbrella and the mud blocking flange are all positioned in the inner cavity of the bell jar; the upper end of the flushing pipe device is arranged on the top wall of the bell jar and is connected with a gooseneck which is communicated with the gooseneck, and the gooseneck is arranged above the bell jar.

Further, a shaft sleeve is sleeved at the upper end of the main shaft, the mud baffle ring further comprises a horizontal part fixedly connected with the vertical part, the vertical part is positioned below the horizontal part, and the horizontal part is fixed at the upper end of the shaft sleeve; an oil seal flange is arranged in a closed space formed by enclosing the shaft sleeve, the mud baffle ring and the thrust flange, the oil seal flange is fixed on the thrust flange, a framework oil seal is arranged at one side of the oil seal flange, which is contacted with the shaft sleeve, and a rotary oil seal is arranged at one side of the oil seal flange, which is contacted with the vertical part; the oil seal flange, the framework oil seal, the mud baffle ring and the rotary oil seal are enclosed to form a closed space which is an annular lubricating oil cavity.

Further, the side wall of the thrust flange is provided with a mounting hole which is inwards trapped on the side surface of the thrust flange, and a grease nipple is mounted on the mounting hole; the mounting hole extends inwards to form a butter channel, the butter channel comprises a first channel and a second channel which are communicated, the first channel is horizontally positioned in the thrust flange, the second channel vertically penetrates through the oil seal flange and the thrust flange, and an opening of the second channel is communicated with the annular lubricating oil cavity opposite to the annular lubricating oil cavity; the grease nipple supplies oil to the grease channel to enable the oil to enter the annular lubricating oil cavity to lubricate the rotary oil seal and the framework oil seal.

(III) beneficial effects

The beneficial effects of the utility model are as follows:

the utility model provides a top drive spindle device with a sealing structure, which is provided with a mud blocking flange, a sealing bottom ring and a sealing ring, wherein the sealing ring is sleeved in a groove formed by the mud blocking ring, a thrust flange and a bell jar after being arranged on the sealing bottom ring, then the mud blocking flange is fixed with the sealing bottom ring, and the mud blocking flange and the sealing bottom ring are mutually extruded to enable the sealing ring to deform and cling to the inner wall of the bell jar so as to seal the groove. The slurry accumulated in the bell jar is prevented from entering the annular lubricating oil cavity to be in direct contact with the oil seal, the service life of the oil seal is ensured, and the slurry is also ensured not to enter the gear box.

Drawings

FIG. 1 is a schematic structural view of a top drive spindle assembly having a seal structure;

FIG. 2 is a schematic view of a partial cross-sectional structure of a top drive spindle assembly with a seal structure;

FIG. 3 is a schematic view of the location structure of the mud flap flange, the sealing bottom ring, and the sealing ring.

[ reference numerals description ]

1: a main shaft;

2: a thrust flange; 21: a mounting hole; 22: a butter channel; 221: a first channel; 222: a second channel;

3: a mud baffle ring; 31: a vertical portion; 32: a horizontal portion;

4: a bell jar; 41: a base;

5: a sealing structure; 51: a mud-stopping flange; 511: a lower end wall; 512: a fixing hole; 52: sealing the bottom ring; 521: a bolt post; 53: a seal ring; 531: a through hole; 54: a mud umbrella; 541: a vertical portion; 542: an umbrella part; 543: a protrusion;

6: a gear box cover; 7: a dust seal; 8: a flushing pipe device;

9: a lower nut; 91: a groove;

10: a laryngeal cuff; 11: a gooseneck; 12: a shaft sleeve;

13: an oil seal flange; 131: a framework oil seal; 132: rotating an oil seal;

14: an annular lubricating oil cavity; 15: and a grease nipple.

Detailed Description

In order that the above-described aspects may be better understood, exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

As shown in fig. 1-3, the utility model provides a top drive spindle device with a sealing structure, which comprises a spindle 1, a thrust flange 2, a gear box, a bell jar 4, a sealing structure 5, a wash pipe device 8 and a gooseneck 11. As shown in fig. 1 and 2, the thrust flange 2 is disposed on the gear box, and the upper end of the main shaft 1 sequentially extends upward from the gear box cover 6 and the thrust flange 2 of the gear box, and is connected with the flushing pipe device 8 through the lower nut 9. As shown in fig. 1, the upper end of the flushing pipe device 8 is arranged on the top wall of the bell jar 4 and is connected with a gooseneck 11 which is communicated with the gooseneck 11, and the gooseneck 11 is arranged above the bell jar 4. As shown in fig. 1 and 2, the opening at the lower end of the bell jar 4 extends radially outwards to form a base 41, and the base 41 is fixed on the thrust flange 2 so that the sealing structure 5 and the flushing pipe device 8 are both positioned in the inner cavity of the bell jar 4. The lower end of the main shaft 1 extends out from the lower end of the gear box to be connected with a downhole drilling tool.

As shown in fig. 2, a mud guard ring 3 is sleeved on the outer side of the main shaft 1, and the mud guard ring 3 comprises a vertical portion 31 and a horizontal portion 32 fixedly connected with the vertical portion 31. The upper end of the main shaft 1 is sleeved with a shaft sleeve 12 through interference fit, and a horizontal part 32 is fixed at the upper end of the shaft sleeve 12. The vertical portion 31 is located below the horizontal portion 32, and the vertical portion 31 is located above the thrust flange 2. The mud guard ring 3 is sleeved with a dustproof seal 7, and the lower end of the dustproof seal 7 is contacted with the thrust flange 2 to shield a gap between the vertical part 31 and the thrust flange 2.

An oil seal flange 13 is arranged in a closed space formed by the shaft sleeve 12, the mud retainer ring 3 and the thrust flange 2, and the oil seal flange 13 is fixed on the thrust flange 2. The side of the oil seal flange 13 contacting the shaft sleeve 12 is provided with a skeleton oil seal 131, and the side of the oil seal flange 13 contacting the vertical portion 31 is provided with a rotary oil seal 132. A closed annular lubricating oil chamber 14 surrounded by the oil seal flange 13, the skeleton oil seal 131, the mud guard ring 3 and the rotary oil seal 132 is formed on the outside of the oil seal flange 13 and the inside of the mud guard ring 3.

The side wall of the thrust flange 2 is provided with a mounting hole 21 which is internally trapped on the side surface of the thrust flange 2, and the grease nipple 15 is mounted on the mounting hole 21.

The mounting hole 21 extends inwards to form a butter passage 22, the butter passage 22 comprises a first passage 221 and a second passage 222 which are communicated, the first passage 221 is horizontally arranged in the thrust flange 2, the second passage 222 vertically penetrates through the oil seal flange 13 and the thrust flange 2, and the second passage 222 is opened opposite to the annular lubricating oil cavity 14 and is communicated with the annular lubricating oil cavity 14. The grease nipple 15 supplies oil to the grease passage 22 so that the oil enters the annular lubrication chamber 14 to lubricate the rotary oil seal 132 and the skeleton oil seal 131.

The sealing structure 5 is sleeved outside the main shaft 1 and comprises a mud blocking flange 51, a sealing bottom ring 52, a sealing ring 53 and a mud umbrella 54. As shown in fig. 2 and 3, the upper surface of the seal bottom ring 52 is provided with a plurality of bolt posts 521, the seal ring 53 is provided with a plurality of through holes 531 corresponding to the bolt posts 521, and the seal ring 53 is sleeved in the grooves formed by the vertical portion 31, the thrust flange 2 and the bell jar 4 through the bolt posts 521 in a one-to-one correspondence manner, and at this time, the seal ring 53 is higher than the bolt posts 521.

The mud guard flange 51 is sleeved on the outer side of the main shaft 1, a fixing hole 512 corresponding to the bolt stud 521 is formed in the circumference of the lower end wall 511 of the mud guard flange 51, a fixing piece penetrates through the fixing hole 512 and stretches into the bolt stud 521 to be fixed in place, and after the lower end wall 511 and the sealing bottom ring 52 apply extrusion force to the sealing ring 53 to enable the sealing ring 53 to be tightly attached to the inner wall of the bell jar 4 to seal the groove. Meanwhile, the lower end wall 511 is higher than the base 41 to form a barrier with a certain height, so that slurry accumulated in the bell jar 4 is prevented from entering the annular lubricating oil cavity 14, the service lives of the skeleton oil seal 131 and the rotary oil seal 132 are prolonged, and the slurry is ensured not to enter the gearbox.

As shown in fig. 2, the mud umbrella 54 is located between the flushing pipe device 8 and the mud flange 51, and is sleeved on the lower nut 9.

Specifically, mud umbrella 54 includes a connected vertical portion 541 and an umbrella portion 542. A plurality of grooves 91 are circumferentially arranged on the side wall surface of the lower nut 9, a plurality of protrusions 543 matched with the grooves 91 are arranged on the inner side of the vertical portion 541, the protrusions 543 are aligned with the grooves 91 and sleeved on the outer side of the lower nut 9, so that the mud umbrella 54 is sleeved more firmly, and a hose clamp 10 is sleeved on the circumference of the protrusions 543 aligned with the grooves 91 on the outer side of the mud umbrella 54. At this time, the umbrella 542 covers the mud flap flange 51 below. The mud is prevented from directly falling onto the mud guard ring 3 from above the mud guard flange 51, so that the annular lubricating oil cavity 14 is prevented from contacting the skeleton oil seal 131 and the rotary oil seal 132, and the service lives of the skeleton oil seal 131 and the rotary oil seal 132 are ensured.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims (10)

1. The utility model provides a top drive spindle unit with seal structure, includes main shaft (1), thrust flange (2), fender mud ring (3) and bell jar (4), the upper end of main shaft (1) is followed upwards stretch out in thrust flange (2), fender mud ring (3) cover is located the outside of main shaft (1), fender mud ring (3) include vertical portion (31), vertical portion (31) are located thrust flange (2) top, the radial outwards extension of bell jar (4) lower extreme opening part forms base (41), base (41) are fixed in thrust flange (2), its characterized in that still includes seal structure (5), seal structure (5) cover are located the main shaft (1) outside;

the sealing structure (5) comprises a mud blocking flange (51), a sealing bottom ring (52) and a sealing ring (53), wherein a plurality of bolt columns (521) are arranged on the upper surface of the sealing bottom ring (52), a plurality of through holes (531) corresponding to the bolt columns (521) are arranged on the sealing ring (53), the sealing ring (53) is sleeved on the bolt columns (521) in a one-to-one correspondence manner through the through holes (531) and is connected with the sealing bottom ring (52) and is positioned in a groove formed by the vertical part (31), the thrust flange (2) and the bell jar (4), and the sealing ring (53) is higher than the bolt columns (521);

the mud blocking flange (51) is sleeved on the outer side of the main shaft (1), a fixing hole (512) corresponding to the bolt column (521) is formed in the circumference of the lower end wall (511) of the mud blocking flange (51), a fixing piece is arranged in the fixing hole (512) in a penetrating mode, after the bolt column (521) is fixed in place, the lower end wall (511) and the sealing bottom ring (52) apply extrusion force to the sealing ring (53), so that the sealing ring (53) and the inner wall of the bell jar (4) are tightly attached to seal the groove.

2. A top drive spindle arrangement with a sealing arrangement according to claim 1, wherein the lower end wall (511) is higher than the base (41).

3. The top drive spindle device with the sealing structure according to claim 1, wherein the thrust flange (2) is arranged on a gear box, and the upper end of the spindle (1) sequentially extends upwards from a gear box cover (6) of the gear box and the thrust flange (2);

the lower end of the main shaft (1) extends out of the lower end of the gear box, and the lower end of the main shaft (1) can be connected with a downhole drilling tool.

4. The top drive spindle device with the sealing structure according to claim 1, wherein a dust seal (7) is sleeved on the mud guard ring (3), and the lower end of the dust seal (7) is in contact with the thrust flange (2) so as to shield a gap between the vertical portion (31) and the thrust flange (2).

5. A top drive spindle arrangement with a sealing arrangement according to claim 1, further comprising a flushing pipe arrangement (8), the upper end of the spindle (1) being connected to the flushing pipe arrangement (8) by means of a lower nut (9).

6. A top drive spindle arrangement with a sealing arrangement according to claim 5, characterized in that the sealing arrangement (5) further comprises a mud umbrella (54), the mud umbrella (54) being located between the flushing pipe arrangement (8) and the mud-stopping flange (51), the mud umbrella (54) comprising a connected vertical part (541) and umbrella part (542);

a plurality of grooves (91) are circumferentially arranged on the side wall surface of the lower nut (9), a plurality of protrusions (543) matched with the grooves (91) are arranged on the inner side of the vertical portion (541), and the protrusions (543) are aligned to the grooves (91) and sleeved on the outer side of the lower nut (9);

the umbrella part (542) covers the mud-stopping flange (51) below.

7. The top drive spindle device with the sealing structure according to claim 6, wherein a throat hoop (10) is sleeved on the circumference of the protrusion (543) aligned with the groove (91) outside the mud umbrella (54).

8. The top drive spindle device with the sealing structure according to claim 6, characterized in that the flushing pipe device (8), the mud umbrella (54) and the mud blocking flange (51) are all located in an inner cavity of the bell jar (4);

the upper end of the flushing pipe device (8) is mounted on the top wall of the bell jar (4) and is connected with a gooseneck (11) which is communicated with the gooseneck (11), and the gooseneck (11) is mounted above the bell jar (4).

9. The top drive spindle device with the sealing structure according to claim 1, wherein a shaft sleeve (12) is sleeved at the upper end of the spindle (1), the mud baffle ring (3) further comprises a horizontal part (32) fixedly connected with the vertical part (31), the vertical part (31) is positioned below the horizontal part (32), and the horizontal part (32) is fixed at the upper end of the shaft sleeve (12);

an oil seal flange (13) is arranged in a closed space enclosed by the shaft sleeve (12), the mud baffle ring (3) and the thrust flange (2), the oil seal flange (13) is fixed on the thrust flange (2), a framework oil seal (131) is arranged at one side of the oil seal flange (13) contacted with the shaft sleeve (12), and a rotary oil seal (132) is arranged at one side of the oil seal flange (13) contacted with the vertical part (31);

the oil seal flange (13), the framework oil seal (131), the mud baffle ring (3) and the rotary oil seal (132) are enclosed into a closed space which is an annular lubricating oil cavity (14).

10. Top drive spindle unit with sealing structure according to claim 9, characterized in that the side wall of the thrust flange (2) is provided with a mounting hole (21) which is embedded in the side surface of the thrust flange (2), the mounting hole (21) is provided with a grease nipple (15);

the mounting hole (21) extends inwards to form a butter channel (22), the butter channel (22) comprises a first channel (221) and a second channel (222) which are communicated, the first channel (221) is horizontally positioned in the thrust flange (2), the second channel (222) vertically penetrates through the oil seal flange (13) and the thrust flange (2), and the second channel (222) is communicated with the annular lubricating oil cavity (14) opposite to the annular lubricating oil cavity (14);

the grease nipple (15) supplies oil to the grease channel (22) so that the oil enters the annular lubricating oil cavity (14) to lubricate the rotary oil seal (132) and the framework oil seal (131).