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CN-122014134-A - Rope directional coring drilling device with composite function

CN122014134ACN 122014134 ACN122014134 ACN 122014134ACN-122014134-A

Abstract

The invention discloses a rope directional coring drilling device with a composite function, and belongs to the technical field of geological exploration and resource development. The method aims to solve the problems of poor precision, insufficient stability and inaccurate data association of the existing directional coring technology. The device comprises a stable outer tube assembly, a suspension assembly, an orientation measurement assembly and a coring inner tube assembly. The fixed shell of the suspension assembly is connected with the outer tube, a rotatable rotating mandrel is arranged in the outer tube through a bearing assembly, and the orientation measurement assembly is connected below the rotating mandrel. The inner wall of the outer tube is provided with a positioning key groove, the outer wall of the inner tube is provided with a matched positioning key. An automatic righting clamping mechanism driven by an electric telescopic rod is additionally arranged in the outer tube, so that the inner tube can be held tightly after the inner tube is in place, and vibration deflection is prevented. And a wireless sensing module is arranged at the bottom of the inner tube and inside the outer tube, and the inner tube in-place moment is automatically marked and correlated with the orientation data. The invention combines mechanical coupling and intelligent control to realize high-stability, high-precision and automatic rope directional coring.

Inventors

  • GONG CHEN
  • WU JINGLONG
  • KONG XU
  • CHEN XIANGMEI
  • REN YONGQIANG

Assignees

  • 鄂尔多斯应用技术学院

Dates

Publication Date
20260512
Application Date
20260318

Claims (9)

  1. 1. A rope directional coring drilling device with a composite function, comprising: A stable outer tube assembly (4) with an upper end for connection to a drill string and a lower end connected to a coring bit (42) and an axially extending locating key slot (41) provided in the inner wall, a suspension assembly (2) with an upper end connected to a rope fishing assembly (1) and a lower end fixedly connected to the upper end of the stable outer tube assembly (4), a coring inner tube assembly (5) capable of being fed into or removed from the stable outer tube assembly (4) by a rope through the rope fishing assembly (1), an outer wall provided with a locating key (51) cooperating with the locating key slot (41), and a directional measuring assembly (3), wherein the suspension assembly (2) further comprises a rotating spindle (22) rotatably provided in the fixed housing (21), the rotating spindle (22) being connected to the fixed housing (21) by a bearing assembly and having a central passage for the passage of the coring inner tube assembly (5), the directional measuring assembly (3) being connected to the rotating spindle (22) and located inside the stable outer tube assembly (4) when the centering key (41) is inserted into the locating key slot (41), while the coring inner tube assembly (5) is connected to the rotating mandrel (22).
  2. 2. Rope directional core drilling arrangement according to claim 1, characterized in that the bearing assembly of the suspension assembly (2) comprises at least one set of thrust bearings (23) and at least one set of radial bearings (24), the rotating spindle (22) being supported in the stationary housing (21) by means of the thrust bearings (23) and the radial bearings (24), a seal (25) being further provided in the stationary housing (21) for sealing the bearing assembly.
  3. 3. The rope directional coring drilling device according to claim 1, wherein the positioning key (51) is a protruding block arranged on the outer wall of the coring inner tube assembly (5), and the positioning key groove (41) is an axial groove which is formed on the inner wall of the stabilizing outer tube assembly (4) and is matched with the protruding block in shape.
  4. 4. A rope directional core drilling apparatus according to claim 3, wherein the cross-sectional shape of the positioning key (51) is one of rectangular, trapezoidal or dove tail.
  5. 5. A rope directional core drilling apparatus according to claim 1, characterized in that the outer part of the directional measurement assembly (3) is sleeved with a centralizer for centering it within the stabilizing outer tube assembly (4).
  6. 6. Rope directional core drilling device according to claim 1, characterized in that the upper end of the directional measurement assembly (3) is fixedly connected to the lower end of the rotating spindle (22) by means of a threaded connection or a plug-in quick coupling.
  7. 7. The rope directional coring drilling device according to claim 1, wherein the coring inner pipe assembly (5) sequentially comprises a spear head (52), a single action mechanism (53), an inner pipe body (54) and a clamp spring seat (55) arranged at the bottom end of the inner pipe body (54) from top to bottom, and the positioning key (51) is arranged on the outer wall of the inner pipe body (54).
  8. 8. The rope directional core drilling device according to claim 1, wherein a ring body (6) is arranged inside the stable outer tube assembly (5), three groups of first fixing blocks (61) are arranged on the ring body (6) in a ring mode, a first connecting rod (63) is hinged to the first fixing blocks (61), a clamping arm (63) is hinged to the first connecting rod (63), an electric telescopic rod (64) is arranged at the bottom of the ring body (6), three groups of second fixing blocks (65) are arranged at the bottom of the electric telescopic rod (64) in a ring mode, a second connecting rod (66) is hinged to the second fixing blocks (65), and an anti-skid pad (67) is arranged on the second connecting rod (66).
  9. 9. Rope directional coring drilling device according to claim 1, characterized in that inside the jump ring seat (55) of the coring inner tube assembly (5) a micro Radio Frequency Identification (RFID) tag or a low power consumption pressure pulse generator is integrated. And an RFID card reader or a pressure sensor is arranged at a position corresponding to the inner wall of the stable outer tube assembly (4).

Description

Rope directional coring drilling device with composite function Technical Field The invention relates to the technical field of geological exploration and resource development, in particular to a rope directional coring drilling device with a composite function. Background The acquisition of undisturbed core with accurate spatial azimuth information is the key of geologic structure analysis, ground stress measurement, mineral resource evaluation and major engineering geological investigation. Currently, there are significant limitations to the mainstream technical path to achieve directional coring. The first is a step-by-step method of 'measurement-before-taking', namely, firstly using a single-point or multi-point inclinometer to measure the drilling track and the tool face azimuth in the well, and then putting the conventional coring tool into the well for coring after the instrument is put out. The method has long working cycle and high cost, and the bottom hole assembly between two operations can generate uncontrollable circumferential rotation due to loose buttons, vibration and the like, so that the deviation which is difficult to calibrate exists between an actual tool surface and a previously measured reference surface during subsequent coring, and the orientation reliability is low. The second is a combination of "measurement while drilling" with a coring tool. However, in a cable fishing type coring system, if an expensive instrument is mounted on a salvageable inner pipe assembly, the instrument needs to be lifted out of the ground every time the core is extracted, risks of instrument damage, data interruption and sudden drop in operation efficiency are faced, and if the instrument is fixed on an outer pipe, a fundamental problem must be solved, namely, how to transmit and 'record' the dynamic changing tool face direction measured while drilling to a non-rotating core in real time without distortion. The prior art lacks a mechanical coupling mechanism capable of always maintaining the rigidity and accurate azimuth association between the measurement reference and the core carrier under severe drilling vibration. In addition, under deep hole, hard rock or high vibration conditions, conventional inner tube assemblies may oscillate radially or slightly circumferentially within the hole, which may disrupt the established alignment of the orientation, resulting in failure of the final core orientation data. Meanwhile, how to accurately judge the moment of starting coring and uniquely associate the directional data at the moment with the core which is subsequently taken, the manual judgment still depends at present, and subjective errors exist. Therefore, there is a need for a subversion coring device and method of operation that integrates high precision orientation, high stability retention, high efficiency fishing, and intelligent data correlation. In order to solve the problems, we propose a rope directional coring drilling device with a composite function. Disclosure of Invention The technical scheme is as follows: A rope directional coring drilling device with a composite function comprises a stable outer pipe assembly, a rope fishing assembly, a centering inner pipe assembly, a positioning key and a directional measurement assembly, wherein the upper end of the stable outer pipe assembly is used for being connected with a drill rod string, the lower end of the stable outer pipe assembly is connected with a coring drill bit, an axially extending positioning key groove is formed in the inner wall of the stable outer pipe assembly, the upper end of a suspension assembly fixing shell is connected with the rope fishing assembly, the lower end of the suspension assembly fixing shell is fixedly connected with the upper end of the stable outer pipe assembly, the centering inner pipe assembly can be thrown into or taken out of the stable outer pipe assembly through the rope fishing assembly, the outer wall of the centering inner pipe assembly is provided with the positioning key matched with the positioning key groove, the positioning key is arranged on the outer wall of the centering inner pipe assembly, the rotating mandrel is rotatably arranged in the fixing shell and is connected with the fixing shell through a bearing assembly, the centering measurement assembly is connected to the lower portion of the rotating mandrel, and is located in the stable outer pipe assembly, and when the centering inner pipe assembly is in place, the positioning key is embedded into the positioning key groove of the stable outer pipe assembly, and the positioning mandrel is simultaneously connected with the rotating mandrel. Optionally, the bearing assembly of the suspension assembly comprises at least one set of thrust bearing and at least one set of radial bearing, the rotating mandrel is supported in the fixed shell through the thrust bearing and the radial bearing, and a sealing element for sealing the bearing assemb