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CN-224214143-U - Port sealing device of polar region room van-type rig

CN224214143UCN 224214143 UCN224214143 UCN 224214143UCN-224214143-U

Abstract

The utility model relates to the technical field of investigation equipment, in particular to an orifice sealing device of a polar region room type drilling machine, which comprises a fixing seat, a sealing assembly and a sealing assembly, wherein the fixing seat is fixedly arranged at the bottom of a room, a first through hole penetrating through the fixing seat is arranged in the axial direction, an overflow port is arranged on the inner wall of the first through hole, the sealing assembly penetrates through the first through hole and is inserted into an orifice, the bottom of the first through hole is provided with the sealing connecting piece, the sealing connecting piece is in sealing connection with the sealing assembly, the sealing assembly comprises a first sealing pipe, a second sealing pipe and a third sealing pipe which are nested from outside to inside in the radial direction, the outer wall of the first sealing pipe is in contact with an ice and snow layer, an annular sealing cavity is formed between the inner wall of the second sealing pipe and the outer wall of the third sealing pipe, and the inner wall of the third sealing pipe forms a drilling fluid channel.

Inventors

  • LI YAZHOU
  • SUN YUCHEN
  • CHENG WENBO
  • WANG YUXUAN
  • WANG CHUNLEI
  • ZHANG WEI
  • ZHOU ZHENG
  • WANG JIN
  • SUN JUNYING
  • LIU YINGYI
  • ZHANG KAI
  • YANG GANSHENG

Assignees

  • 中国地质大学（北京）
  • 中地装(北京)科学技术研究院有限公司

Dates

Publication Date
20260508
Application Date
20250625

Claims (10)

  1. 1. An orifice sealing device for a polar-region van-type drilling machine, comprising: the fixing seat (1), the fixing seat (1) is fixedly arranged at the bottom of the house (2), the fixing seat (1) is axially provided with a first through hole (11) which penetrates through, and the inner wall of the first through hole (11) is provided with an overflow port (13); The sealing component is inserted into the orifice through the first through hole (11), a sealing connecting piece (3) is arranged at the bottom of the first through hole (11), and the sealing connecting piece (3) is in sealing connection with the sealing component; The sealing assembly comprises a first sealing tube (41), a second sealing tube (42) and a third sealing tube (43) which are nested from outside to inside along the radial direction, wherein the outer wall of the first sealing tube (41) is in contact with an ice and snow layer, an annular sealing cavity is formed between the inner wall of the second sealing tube (42) and the outer wall of the third sealing tube (43), and a drilling fluid channel is formed by the inner wall of the third sealing tube (43).
  2. 2. The polar-house type drilling machine orifice sealing device of claim 1, wherein, The top of the first sealing tube (41) is provided with a flange (411) extending in the radial direction, and the bottom of the first through hole (11) is provided with a clamping groove (12) matched with the flange (411); When the first sealing tube (41) is inserted into the bottom of the first through hole (11), the flange (411) is clamped in the clamping groove (12); The bottom of the first sealing tube (41) axially penetrates through the first through hole (11) and extends to the lower part of the fixing seat (1).
  3. 3. The polar-house type drilling machine orifice sealing device of claim 2, wherein, The sealing connecting piece (3) is of an annular structure, and the sealing connecting piece (3) comprises a first semi-annular piece (31) and a second semi-annular piece (32) which are in butt joint; The circumferential outer wall of the first sealing tube (41) is provided with an annular slot (412); the first semi-annular piece (31) and the second semi-annular piece (32) are respectively inserted into and clamped with the annular slot (412) from the two axial sides; the first semi-annular piece (31) and the second semi-annular piece (32) are fixedly connected with the bottom of the fixing seat (1) through bolts.
  4. 4. The port seal of a polar-house type drilling machine as claimed in claim 3 wherein, The inner wall of the first sealing tube (41) is of a stepped structure, wherein the inner diameter of the upper section (41 a) is larger than that of the lower section (41 b), and a first clamping step surface (41 c) is formed and used for limiting and fixing the second sealing tube (42).
  5. 5. The polar-house type drilling machine orifice sealing device of claim 4, wherein, A limiting ring (413) is arranged at the upper part of the circumferential inner wall of the first sealing tube (41), and the limiting ring (413) is used for axially limiting the second sealing tube (42); The lower part of the peripheral inner wall of the first sealing tube (41) is provided with a first sealing ring, the peripheral outer wall of the second sealing tube (42) is provided with a first mounting groove (421), and the first sealing ring is fixed in the first mounting groove (421) in an extrusion mode.
  6. 6. The polar-house type drilling machine orifice sealing device of claim 5, wherein, The second seal tube (42) and the third seal tube (43) have a length greater than that of the first seal tube (41), and the lower portions of the second seal tube (42) and the third seal tube (43) are inserted into the orifice through the first seal tube (41).
  7. 7. The polar-house type drilling machine orifice sealing device of claim 6, wherein, A sealing flange (5) is arranged between the second sealing pipe (42) and the third sealing pipe (43), and the sealing flange (5) is used for sealing a gap between the second sealing pipe (42) and the third sealing pipe (43); A second sealing ring is arranged on the circumferential outer wall of the third sealing tube (43), a second mounting groove (51) is formed on the circumferential inner wall of the sealing flange (5), and the second sealing ring is fixedly extruded in the second mounting groove (51); The sealing flange (5) is located at the top of the second sealing tube (42), and the sealing flange (5) and the second sealing tube (42) are fixed through bolts so as to limit the third sealing tube (43) axially.
  8. 8. The polar-house type drilling machine orifice sealing device of claim 1, wherein, The top of the fixing seat (1) is provided with a clamp holder (6), the clamp holder (6) comprises a pair of slips (61) and an oil cylinder (62), and the oil cylinder (62) is used for driving the slips (61) to move relatively along the radial direction; The inner side wall of the slip (61) is provided with a friction contact surface (611) which comprises a uniformly distributed particle structure and is used for forming friction fit with the outer surface of the drill rod; The slips (61) are radially movable to grip the drill pipe via the friction interface (611).
  9. 9. The polar-house type drilling machine orifice sealing device of claim 8, wherein, The drilling machine further comprises a guide mechanism (7), wherein the guide mechanism (7) is fixed at the top of the clamp holder (6), the guide mechanism (7) is provided with a second through hole (71) for passing through a drill rod, and the second through hole (71) coincides with the axial center line of the first through hole (11).
  10. 10. The polar-house type drilling machine orifice sealing device of claim 9, wherein, The electric fork (8) is arranged at the top of the guide mechanism (7), and the electric fork (8) is provided with two clamping arms (81); The circumferential outer wall of the drill rod is provided with a radially extending clamping flange, and the clamping arm (81) can be inserted into the space below the clamping flange to form clamping fit with the clamping flange so as to limit and fix the axial direction of the drill rod.

Description

Port sealing device of polar region room van-type rig Technical Field The utility model relates to the technical field of investigation equipment, in particular to an orifice sealing device of a polar region compartment type drilling machine. Background In the drilling construction process, a gap exists between the orifice and the drill rod, so that an orifice sealing device is required to be arranged, and liquid in the orifice is prevented from overflowing out of the drilled hole and flowing to the ground. The patent application with the patent publication number of CN213573960U discloses an orifice sealing device, which comprises an elastic slip, a sealing piece and a sealing through hole, wherein a clamping hole for a drill rod to pass through is formed in the elastic slip in a sealing mode, the sealing piece is used for covering a drill hole, the sealing piece is provided with the sealing through hole, the elastic slip is rotatably arranged in the sealing through hole by taking the central axis of the clamping hole as a rotating shaft, the sealing arrangement is carried out between the elastic slip and the sealing through hole, and the drill rod passing through the clamping hole passes through the sealing through hole. The prior orifice sealing device is suitable for orifice sealing in a common environment. However, when the investigation operation is performed in extremely cold regions, the stratum structure is different from the common environment, the stratum structure in extremely cold regions comprises an ice layer on the surface and a rock layer below the ice layer, and when the drilling operation is performed, the ice layer and the ice layer are drilled first and then the rock layer is drilled. Therefore, based on the special geographical environment of extremely cold regions and the protection of natural geographical environment, when the orifice sealing is considered, the orifice sealing can not be carried out only according to the rock stratum condition of the common environment, and the sealing of the ice and snow layer is also considered, so that the drilling fluid is completely isolated from the ice and snow layer, and the pollution to the ice and snow layer is avoided. Disclosure of utility model First, the technical problem to be solved In view of the above-mentioned shortcomings and drawbacks of the prior art, the present utility model provides an orifice sealing device for a polar-region van-type drilling machine, which solves the problems of the prior art. (II) technical scheme In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps: An orifice sealing device of a polar-region van-type drilling machine, comprising: The fixing seat is fixedly arranged at the bottom of the house, a first through hole penetrating through the fixing seat is formed in the axial direction of the fixing seat, and an overflow port is formed in the inner wall of the first through hole; The sealing component penetrates through the first through hole and is inserted into the orifice, a sealing connecting piece is arranged at the bottom of the first through hole, and the sealing connecting piece is in sealing connection with the sealing component; The sealing assembly comprises a first sealing tube, a second sealing tube and a third sealing tube which are nested from outside to inside along the radial direction, the outer wall of the first sealing tube is in contact with the ice and snow layer, an annular sealing cavity is formed between the inner wall of the second sealing tube and the outer wall of the third sealing tube, and a drilling fluid channel is formed on the inner wall of the third sealing tube in a stroke mode. The top of the first sealing tube is provided with a flange extending in the radial direction, and the bottom of the first through hole is provided with a clamping groove matched with the flange; When the first sealing tube is inserted into the bottom of the first through hole, the flange is clamped in the clamping groove; the bottom of the first sealing tube axially penetrates through the first through hole and extends to the lower portion of the fixing seat. The sealing connecting piece is of an annular structure and comprises a first semi-annular piece and a second semi-annular piece which are in involution; the circumferential outer wall of the first sealing tube is provided with an annular slot; The first semi-annular piece and the second semi-annular piece are respectively inserted into and clamped with the annular slot from the two axial sides of the annular slot; the first semi-annular piece and the second semi-annular piece are fixedly connected with the bottom of the fixing seat through bolts. The inner wall of the first sealing tube is of a stepped structure, wherein the inner diameter of the upper section is larger than that of the lower section, and a first clamping step surface is formed and used for limiting and f