CN211623372U - Rope coring drilling tool suitable for large-caliber horizontal engineering geological exploration - Google Patents

Abstract

The utility model discloses a rope coring drilling tool suitable for large-caliber horizontal engineering geological exploration, which comprises a bullet clip positioning assembly and a salvaging and pushing device, wherein the salvaging and pushing device comprises a joint, a catching mechanism and a pushing mechanism; the lower part of the joint is connected with a capturing mechanism and a pushing mechanism, and the pushing mechanism is positioned in the capturing mechanism; the elastic clamp positioning assembly comprises a clamping jaw, a pressing sleeve, a clamping jaw spring, a pressing cover, a clamping jaw support, a suspension ring and a pressing sleeve spring; the clamping jaw is hinged with the clamping jaw support, a gland is arranged at the upper part of the clamping jaw support, a pressing sleeve is arranged in an inner hole of the clamping jaw support, a flange is arranged in the middle of the side wall of the pressing sleeve, and the flange can be in contact with a positioning surface of the clamping jaw; a pressing sleeve spring is arranged between the pressing sleeve and the claw support. The utility model discloses can improve the centering effect of heavy-calibre horizontal drilling rope coring drilling tool in salvaging the reliability and the transportation process of recovery in retrenching the structure, reduce the demand of the heavy-calibre horizontal drilling in order to satisfy the engineering geology of the abnormal wear of drilling tool.

Description

A wire-line coring tool suitable for large-diameter horizontal engineering geological exploration

technical field

The utility model relates to a rope coring drilling tool suitable for large-diameter horizontal engineering geological exploration.

Background technique

With the in-depth development of the national strategic super project Sichuan-Tibet Railway, engineering geological exploration has ushered in new challenges. The Sichuan-Tibet Railway has complex engineering geological conditions and high construction risks. The existing equipment cannot adapt to high-altitude geological conditions, resulting in low accuracy of comprehensive geophysical prospecting and geological prediction. Coring by horizontal drilling is a more intuitive geological exploration method. Therefore, it is particularly necessary to carry out research on long-distance, large-diameter, near-horizontal high-precision drilling tools to meet the geological forecasting needs of the construction of ultra-long tunnels on the Sichuan-Tibet Railway, and to ensure construction safety and improve construction efficiency. Wireline coring drilling technology has the advantages of high drilling efficiency and small disturbance to the sample, and has been widely used in the field of small-diameter geological exploration. However, compared with conventional geological exploration, large-diameter long-distance near-horizontal exploration mainly has the following differences: the diameter of conventional geological exploration is usually between 75mm and 150mm, and the near-vertical drilling scheme is mainly used. The hole diameter is usually between 300mm-600mm, and a near-horizontal drilling scheme is used. The increase in the diameter of the borehole increases the number of core samples drilled and also increases the overall weight of the drilling tool (the sum of the weight of the drilling tool itself and the weight of the core samples obtained). Conventional geological exploration drilling tools usually use spearhead structure and salvage The fishing hook components in the tool cooperate to realize the salvage and lifting of the drilling tool assembly, and the spearhead is the force concentration point during the operation. As the overall quality of the drilling tool increases significantly, the risk of failure of its spearhead strength increases, and the probability of potential drilling accidents increases. Compared with the vertical drilling scheme, when the drilling tool is affected by gravity, the eccentric wear of the drilling tool is prone to occur during the transportation process when the near-horizontal drilling is adopted, resulting in increased operating resistance. In addition, when the drilling tool is being delivered, the elastic plate of the conventional drilling tool slides down against the inner surface of the drill pipe under the action of the spring force, and its abnormal wear is severe. In order to improve the positioning reliability of the clipboard, it is often necessary to increase the spring stiffness, which also means that the wear of the clipboard is aggravated, and the technical contradiction is more prominent in the deep hole delivery. During the salvage drilling operation, the conventional wire-line coring drill usually relies on pulling the collecting cylinder connected with the spearhead to move a certain distance in the axial direction, so as to realize the contraction of the elastic plate. This way of collecting the card requires that there must be sufficient clearance between the spring clip plate and the spring clip head in the outer tube assembly. When drilling in complex formations, the spring clip plate and the spring clip head are prone to top dead phenomenon. , resulting in the inability to smoothly collect the card and increase the risk of stuck drill accidents. At present, the wire-line coring drilling tools for large-diameter near-horizontal engineering exploration are mainly based on the expansion of the structure size on the premise of following the conventional tool structure. Reliability and stability decreased.

Utility model content

In order to solve the above technical problems, the utility model provides a corded core drilling tool with simple structure, convenient operation, high reliability and good water permeability, which is suitable for large-diameter horizontal engineering geological exploration.

The technical scheme adopted by the utility model is: a rope coring drilling tool suitable for large-diameter horizontal engineering geological exploration, comprising a clip positioning assembly and a salvage pushing device, and is characterized in that: the clip positioning assembly includes: Claw, pressure sleeve, claw spring, pressure cover, claw bracket, suspension ring and pressure sleeve spring; the claw bracket is provided with a plurality of through holes, each through hole is hinged with a claw, and the positioning surface of the claw It extends into the center hole of the claw bracket; a claw spring is arranged between the claw and the claw bracket, a pressure cover is arranged on the claw bracket, and a pressure sleeve is arranged in the center hole of the pressure cover, and the lower part of the pressure sleeve is located on the claw. In the bracket, a flange is arranged in the middle of the side wall of the pressure sleeve, and the flange can be in contact with the positioning surface of the claw; a pressure sleeve spring is arranged between the pressure sleeve and the claw bracket, and the lower part of the claw bracket is provided with a suspension ring;

The salvage pushing device includes a joint, a catching mechanism and a pushing mechanism; the lower part of the joint is connected with the catching mechanism and the pushing mechanism, and the pushing mechanism is located in the catching mechanism; the lower end of the catching mechanism can catch the upper end of the claws.

In the above-mentioned wire-line core drilling tool suitable for large-diameter horizontal engineering geological exploration, the bottom surface of the flange on the side wall of the pressure sleeve is a conical surface with a large upper and a small lower, and the lower part of the clamping claw is provided with a clamping claw for limiting the clamping claw. The limit surface for the rotation angle.

In the above-mentioned wire-line core drilling tool suitable for large-diameter horizontal engineering geological exploration, the upper end of the push mechanism is screwed with the center hole of the joint, and the push mechanism is provided with a locking nut.

In the above-mentioned wire-line core drilling tool suitable for large-diameter horizontal engineering geological exploration, the lower part of the jaw is provided with a through hole, and the roller is installed in the through hole through an elastic cylindrical pin, and the elastic cylindrical pin is arranged parallel to the cylindrical pin. .

In the above-mentioned wire-line coring drill suitable for large-diameter horizontal engineering geological exploration, a plurality of water passages are evenly distributed on the side of the jaw bracket, the water passages are arranged along the busbar of the jaw bracket, and the jaws are hinged on the jaw bracket. The plurality of through holes are evenly arranged in the circumferential direction.

In the above-mentioned wire-line core drilling tool suitable for large-diameter horizontal engineering geological exploration, water-passing key grooves are evenly distributed on the side surface of the suspension ring.

In the above-mentioned wire-line core drilling tool suitable for large-diameter horizontal engineering geological exploration, the catch mechanism is a bell-shaped structure, and the bottom of the catch mechanism can be mutually engaged with the top of the clamping claw.

Compared with the prior art, the beneficial effects of the present utility model are:

1) The total weight of the drilling tool in the present utility model is shared by the multiple claws in the clip assembly during salvage and lifting operations, which reduces the force load of a single claw; compared with the spearhead structure, the utility model The new type can avoid the risk of strength failure of the spearhead due to excessive load, and improve the reliability of the operation process.

2) The clamping claw of the present utility model has both the spearhead and the positioning function of the elastic plate of the conventional drilling tool, which can reduce the number of parts of the drilling tool assembly, and make the structure simpler and more compact. During the horizontal throwing process, the rollers at the lower part of the jaws are in contact with the wall of the drill pipe, which can reduce the running resistance of the drilling tool and reduce the eccentric wear of the drilling tool due to the action of gravity while playing a centering role; The claws in the card assembly can be in a folded state during horizontal delivery, so as to avoid excessive wear during delivery, and have a long service life.

3) In the process of salvage, the utility model relies on the catch mechanism of the salvage device to force the jaws to shrink radially. The shrinkage performance is more rapid and reliable, which can avoid the risk of normal salvage caused by the loss of the clearance between the clip plate and the clip head when conventional drilling tools are drilling in complex formations, with high reliability and convenient operation. In addition, the utility model increases the water-passing annular area of the waterway system, and the overall water-passing performance of the drilling tool is improved and enhanced.

Description of drawings

FIG. 1 is a cross-sectional view of an elastic clip positioning assembly of the present invention.

FIG. 2 is a schematic structural diagram of the elastic clip positioning assembly of the present invention.

FIG. 3 is a schematic view of the structure of the jaws of the present invention.

FIG. 4 is a schematic structural diagram of the salvage pushing device of the present invention.

FIG. 5 is a schematic diagram of the push state of the present invention.

Figure 6 is a schematic diagram of the working state of the present invention.

FIG. 7 is a schematic diagram of the salvage state of the present invention.

In the figure: 1- jaw; 2- press sleeve; 3- jaw spring; 4- gland; 5- cylindrical pin; 6- elastic cylindrical pin; 7- roller; 8- press sleeve spring; 9- jaw bracket ;10-suspension ring;11-lifting head;12-cylindrical pin;13-joint;14-lock nut;15-push mechanism;16-catch mechanism;17-drill pipe;18-seat ring;19- Bullet card room; 20- Bullet card block head; 92- water tank; 101- water keyway; 021-positioning cone; 011-positioning surface; 012-limiting surface.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1-7, the utility model includes a clip positioning assembly and a salvage pushing device, and the salvage pushing device includes a pulling head 11, a cylindrical pin 12, a joint 13, a locking nut 14, a pushing mechanism 15, Catch mechanism 16; the pulling head 11 is hinged with the upper part of the joint 11 through the cylindrical pin 12, the lower part of the joint 11 is provided with a catch mechanism 13 and a push mechanism 14, the push mechanism 14 is located in the catch mechanism 13, the push mechanism 14 and the joint 11 The center hole is screwed, and the push mechanism 14 is provided with a locking nut 12.

The elastic clip positioning assembly includes a claw 1, a pressure sleeve 2, a claw spring 3, a pressure cover 4, a roller 7, a pressure sleeve spring 8, a claw bracket 9 and a suspension ring 10; the sides of the claw bracket 9 are evenly distributed There are a plurality of water passages 92, and the water passages are arranged along the busbars of the jaw brackets. The jaw bracket 9 is provided with a plurality of through holes 91, and the plurality of through holes 91 are evenly arranged in the circumferential direction. Each through hole 91 is hinged to a jaw 1 through a cylindrical pin 5, and the positioning surface 011 of the jaw 1 extends into the card. in the center hole of the claw bracket. A claw spring 3 is arranged between the claw 1 and the claw bracket 9 , a pressure cover 4 is arranged on the claw bracket 9 , a pressure sleeve 2 is arranged in the center hole of the pressure cover 4 , and the lower part of the pressure sleeve 2 is located on the claw bracket 9 Inside, the middle part of the side wall of the pressing sleeve 2 is provided with a flange, and the flange can be in contact with the positioning surface 011 of the jaw 1 . The bottom surface of the flange on the side wall of the pressure sleeve 2 is a conical surface with a large upper and a small lower, and the lower part of the clamping claw 1 is further provided with a limiting surface 012 for limiting the rotation angle of the clamping claw. The lower part of the jaw 1 is provided with a through hole, and the roller 7 is installed in the through hole through an elastic cylindrical pin 6 , and the elastic cylindrical pin 6 is arranged parallel to the cylindrical pin 5 . A compression sleeve spring 8 is arranged between the pressing sleeve 2 and the claw bracket 9 , and a suspension ring 10 is arranged on the lower part of the clamping claw bracket 9 . The catching mechanism 16 is a bell-shaped structure, and the bottom of the catching mechanism 16 can be mutually engaged with the top of the clamping claw 1 .

The concrete use method of the present utility model is as follows:

The utility model adopts a rigid jacking method (such as a hard pipe or a high-strength steel strand) to push and recover the drilling tools. When the pushing operation is performed, the catching mechanism 16 in the salvage pushing device is first removed, and then the salvage pushing device is put into The push mechanism 15 is matched with the pressing sleeve 2 in the elastic clip assembly. Because the push mechanism 15 exerts an axial force on the pressure sleeve 2, the pressure sleeve 2 overcomes the elastic force of the pressure sleeve spring 8 to produce axial movement, and the conical surface 021 of the pressure sleeve 2 contacts with the positioning surface 011 of the jaw 1, forcing the clamping The claw 1 rotates around the cylindrical pin 5 , so that the upper part of the claw 1 is in a retracted state, and the lower roller 7 of the claw 1 is stretched out to contact the wall of the drill rod 17 . The salvage pushing device pushes the drilling tool to carry out the horizontal pushing operation.

When pushed in place, the pushing mechanism 15 is returned, and the pressing sleeve 2 is reset under the elastic force of the pressing sleeve spring 8 . At this time, the pressing sleeve 2 is not in contact with the clamping claw 1, and the clamping claw 1 is reset to the outside under the action of the spring force of the retaining spring 3, so that the clamping claw 1 is locked in the elastic clamping chamber 19 of the outer tube assembly for drilling. normal drilling operation.

After the drilling operation is completed, the salvage and recovery operation is carried out. First, the pushing mechanism 15 in the salvage pushing device is removed, and then the catching mechanism 16 is installed. ) into the central hole of the catching mechanism 13 to deliver the salvage pushing device, so that the bell-shaped catching mechanism 16 in the salvaging and pushing device covers the claw 1 in the clip assembly, and the top of the claw 1 and the bottom of the catching mechanism 16 are mutually connected. bite. At this time, the claw 1 rotates around the cylindrical pin 5 to realize the retraction of the claw 1, and the salvage pushing device is pulled to lift the inner tube assembly from the bottom of the hole together to complete the salvage operation process.

Claims (7)

1. The utility model provides a rope coring drilling tool suitable for horizontal engineering geological exploration of heavy-calibre, includes bullet card positioning assembly, salvages pusher, characterized by: the elastic clamp positioning assembly comprises a clamping jaw, a pressing sleeve, a clamping jaw spring, a pressing cover, a clamping jaw support, a suspension ring and a pressing sleeve spring; a plurality of through holes are formed in the jaw support, a jaw is hinged in each through hole, and the positioning surface of each jaw extends into the central hole of the jaw support; a clamping jaw spring is arranged between the clamping jaw and the clamping jaw support, a pressing cover is arranged on the clamping jaw support, a pressing sleeve is arranged in a central hole of the pressing cover, the lower part of the pressing sleeve is positioned in the clamping jaw support, a flange is arranged in the middle of the side wall of the pressing sleeve, and the flange can be in contact with a positioning surface of the clamping jaw; a pressing sleeve spring is arranged between the pressing sleeve and the jaw support, and a suspension ring is arranged at the lower part of the jaw support;

the fishing and pushing device comprises a joint, a catching mechanism and a pushing mechanism; the lower part of the joint is connected with a capturing mechanism and a pushing mechanism, and the pushing mechanism is positioned in the capturing mechanism; the lower end of the catching mechanism can catch the upper ends of the clamping jaws.

2. A wireline coring drill suitable for use in large bore horizontal engineering geological exploration, as defined in claim 1, wherein: the bottom surface of the upper flange of the side wall of the pressing sleeve is a conical surface with a large upper part and a small lower part, and the lower part of the clamping jaw is provided with a limiting surface for limiting the rotation angle of the clamping jaw.

3. A wireline coring drill suitable for use in large bore horizontal engineering geological exploration, as defined in claim 1, wherein: the lower part of the clamping jaw is provided with a through hole, the roller is arranged in the through hole through an elastic cylindrical pin, and the elastic cylindrical pin is parallel to the cylindrical pin.

4. A wireline coring drill suitable for use in large bore horizontal engineering geological exploration, as defined in claim 1, wherein: a plurality of water passing grooves are uniformly distributed on the side face of the jaw support and are arranged along a jaw support bus, and a plurality of through holes hinged with the jaws on the jaw support are uniformly distributed along the circumferential direction.

5. A wireline coring drill suitable for use in large bore horizontal engineering geological exploration, as defined in claim 1, wherein: the side surface of the suspension ring is uniformly distributed with water passing key slots.

6. A wireline coring drill suitable for use in large bore horizontal engineering geological exploration, as defined in claim 1, wherein: the catching mechanism is of a bell-jar type structure, and the bottom of the catching mechanism can be meshed with the tops of the clamping jaws.

7. A wireline coring drill suitable for use in large bore horizontal engineering geological exploration, as defined in claim 1, wherein: the upper end of the pushing mechanism is in threaded connection with a central hole of the joint, and a locking nut is arranged on the pushing mechanism.

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