Auxiliary extraction device for fractured drill rod of extraction drilling hole
By installing a wire rope connecting rope and a graduated groove connecting belt inside the drill pipe, combined with a guide sleeve and clamping assembly, the problem of depth positioning and removal of broken drill pipes was solved, improving the construction efficiency and safety of gas drainage boreholes.
Patent Information
- Application Number
- CN202511219997.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-28
- Publication Date
- 2025-11-21
AI Technical Summary
Existing technologies make it difficult to accurately locate the depth of the broken drill rod within the borehole, and the tool removal operation is complex and time-consuming, affecting the construction progress and safety of gas drainage boreholes.
The system employs a built-in connecting rope and connecting belt in the drill pipe. The connecting rope is made of steel wire rope, and the connecting belt with graduated grooves indicates the depth when the drill pipe breaks. The broken drill pipe is then removed with the assistance of a guide sleeve and clamping assembly.
It enables intuitive measurement and convenient removal of fractured drill pipe depth, improves drilling efficiency, simplifies operation procedures, and reduces costs.
Smart Images
Figure CN120990519A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of gas extraction drilling, in particular to an auxiliary taking-out device for a fractured drill rod of a gas extraction drilling. BACKGROUND
[0002] In order to ensure the safety of coal mine production, gas extraction, as a core technical means for controlling coal mine gas disasters, directly determines the efficiency and safety of gas extraction depending on the quality of gas extraction drilling construction. At present, with the increase of coal mining depth and the increase of complex coal seam conditions, the complexity and difficulty of drilling construction also increase, which puts forward higher requirements for the reliability of drilling tools and the stability of construction.
[0003] In actual gas extraction drilling construction, factors such as fluctuation of geological conditions, defects of drilling tools and improper operation parameters can easily cause excessive friction between the drill rod and the hole wall or sticking of the drill rod, thereby inducing fracture. More importantly, after the drill rod is fractured, the fractured drill rod in the hole needs to be taken out before subsequent drilling operation can continue. The existing taking-out steps are to first measure the depth of the fractured drill rod in the hole, and then use a taking-out tool for auxiliary taking-out.
[0004] The deficiency in the prior art is that: at present, the fracture depth is often estimated by using a scale probe or by referring back to the construction records, which not only has low accuracy due to the influence of coal residue accumulation in the hole and hole wall deformation, but also is difficult to accurately locate the fracture depth position. Moreover, the taking-out tool approaches and captures the fractured drill rod mainly by blind operation, which has poor guiding effect, resulting in complex operation and long time consumption in the taking-out process, and seriously affecting the progress and overall control effect of gas extraction drilling construction. SUMMARY
[0005] The present application aims to provide an auxiliary taking-out device for a fractured drill rod of a gas extraction drilling to solve the problems in the background art.
[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an auxiliary taking-out device for a fractured drill rod of a gas extraction drilling, comprising a drill rod body and a guide sleeve, one end of the drill rod body is provided with a connecting part for connecting with a drilling machine, a connecting rope and a connecting belt are respectively arranged in the drill rod body, a fixed roller is rotatably connected in the connecting part, the connecting belt is connected with the connecting rope after passing through the fixed roller, and a plurality of scale grooves are arranged on the surface of the connecting belt. The guide sleeve can be sleeved on the surface of the connecting rope and guided to approach the drill rod body along the surface of the connecting rope, the guide sleeve is provided with a clamping assembly for fixing the connecting rope, and when the clamping assembly is clamped on the surface of the connecting rope, the connecting rope and the fractured drill rod are pulled out of the hole by pulling the guide sleeve outward.
[0007] Preferably, the inner wall of the connecting part is provided with a threaded groove, and a plug is threadedly connected in the threaded groove.
[0008] Preferably, the plug is fixedly connected with an extrusion block on the side close to the fixed roller.
[0009] Preferably, the connecting rope is a steel wire rope, and the connecting belt is a brittle plastic belt.
[0010] Preferably, the clamping assembly comprises an inner sleeve A threadedly connected in the guide sleeve, the inner wall of the inner sleeve A is fixedly connected with a protruding block, and the inner wall of the guide sleeve is hingedly connected with a plurality of clamping plates matched with the connecting rope, and the clamping plates are obliquely arranged.
[0011] Preferably, torsional springs are arranged at the hinge points between the clamping plates and the inner wall of the guide sleeve.
[0012] Preferably, the clamping assembly comprises an inner sleeve B threadedly connected in the guide sleeve, the inner wall of the inner sleeve B is fixedly connected with a bevel gear block, the guide sleeve is provided with a clamping sleeve matched with the connecting rope, and the surface of the clamping sleeve is provided with a clamping groove.
[0013] Preferably, the surface of the clamping sleeve is provided with a threaded groove matched with the bevel gear block.
[0014] Preferably, the guide sleeve is provided with a protective sleeve at one end close to the drill rod body, and the protective sleeve is a rubber sleeve.
[0015] Preferably, the drill rod body is provided with a drill bit at one end away from the connecting part.
[0016] Compared with the prior art, the present application has the following advantages: In the present application, the connecting rope and the connecting belt are arranged in the drill rod, when the drill rod is broken at any position of the body, the connecting belt at the position is also broken, and the connecting rope is a steel wire rope with high strength and will not be broken with the drill rod body, by pulling the drill rod on the outside, the broken connecting belt moves around the surface of the fixed roller under the fixed pulling force of the connecting rope, and the distance of pulling the drill rod body is displayed on the scale groove on the surface of the connecting rope in real time, so that the depth of the broken drill rod is more intuitively and conveniently viewed, and convenience is provided for subsequent removal of the broken drill rod.
[0017] The present application provides good guiding effect by setting the connecting rope, and the one end of the connecting rope extends from the inner broken drill rod to the outside of the drill hole, which facilitates the guiding sleeve to be sleeved on the connecting rope and slid along the surface of the connecting rope to the broken drill rod in the inside, so that the broken drill rod is taken out conveniently, in addition, if the broken drill rod is close to the drill hole opening, the connecting rope can be pulled out directly, and the drill rod is pulled out directly, so that the taking-out efficiency of the drill rod is greatly improved, and the device has simple structure, controllable cost and is convenient for promotion. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a schematic diagram for showing the overall structure of the drill rod body; Figure 2 It is a schematic diagram for showing the state of the drill rod body cooperating with the guiding sleeve; Figure 3 It is a schematic diagram for showing the state of the drill rod body after being broken in the drill hole; Figure 4 It is an enlarged view of A in the present application; Figure 3 Figure 5 It is a schematic diagram for showing the state of the drill rod body located outside being pulled out from the drill hole; Figure 6 It is a schematic diagram for showing the first embodiment of the clamping assembly; Figure 7 It is a schematic diagram for showing another embodiment of the clamping assembly; Figure 8 It is a schematic diagram for showing the clamping sleeve and the surface structure thereof.
[0019] In the figure: 1, drill rod body; 11, connecting part; 12, drill bit; 2, connecting rope; 21, connecting belt; 211, scale groove; 22, fixed roller; 23, plug; 231, extrusion block; 232, rotating strip; 3, guiding sleeve; 31, inner sleeve A; 311, protruding block; 312, clamping plate; 32, inner sleeve B; 321, bevel gear block; 322, clamping sleeve; 323, clamping groove; 33, protective sleeve. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
[0021] The application discloses a kind of auxiliary extraction devices for extracting broken drill pipe in drilling hole, as shown in Figures 1-8 Including drill pipe body 1 and guide sleeve 3, guide sleeve 3 is used to extract the drill pipe broken in the drill hole, the drill pipe body 1 one end is provided with the connecting part 11 for being connected with drilling machine, when conventional drilling, drill pipe body 1 is connected to drilling machine through connecting part 11, then drilling is carried out, specific connection mode is prior art, this place will not be described again, the connecting rope 2 and connecting band 21 are respectively arranged in the drill pipe body 1, connecting rope 2 is arranged in the central axis position of drill pipe body 1, connecting rope 2 and connecting band 21 are all fixedly connected at the end of drill pipe body 1 away from connecting part 11, the connecting part 11 is rotatably connected with the fixed roller 22, the connecting band 21 is connected with connecting rope 2 after passing through the fixed roller 22, the connecting band 21 surface is provided with a plurality of scale grooves 211, it needs to be noted that scale groove 211 starts from the side of connecting band 21 close to fixed roller 22, and gradually increases the value towards the side of connecting band 21 away from fixed roller 22, scale groove 211 unit is cm or mm, the guide sleeve 3 can be sleeved on the surface of the connecting rope 2, and be slid along the surface of the connecting rope 2 and be guided to be close to drill pipe body 1, the guide sleeve 3 is provided with the clamping assembly for being fixed with the connecting rope 2, when the clamping assembly is clamped on the surface of the connecting rope 2, the connecting rope 2 is pulled out from the drill hole with the broken drill pipe by pulling out the guide sleeve 3.
[0022] Specifically, when drill pipe body 1 is broken in the drilling process, the connecting band 21 located in its interior will also be broken at the breaking point due to the influence of the breaking stress of drill pipe body 1, and since the connecting rope 2 is arranged at the central position of drill pipe body 1, it is not easy to be torn and thus will not be broken. At this time, the total length of the connecting band 21 minus the scale value indicated by the connecting band 21 at the breaking point is the remaining length of the drill pipe broken at the deep part of the drill hole. Before this, the drill pipe close to the outside of the drill hole mouth needs to be taken out first. When the drill pipe located outside is pulled out of the drill hole mouth, since the connecting rope 2 is still fixed in the deep broken drill pipe and is affected by the fixing force of the deep drill pipe, the connecting rope 2 will not move and thus will pull back the connecting band 21 when the drill pipe located outside is pulled out, so that the connecting band 21 moves on the surface of the fixed roller 22 until the drill pipe located outside is completely taken out of the drill hole mouth, as shown in Figure 5 At this time, the end of the drill pipe located outside is flush with the drill hole mouth, and the distance of the drill pipe moved out of the hole is the depth of the internal broken drill pipe from the hole mouth. Since the fixed roller 22 moves a distance equivalent to the distance moved by the broken drill pipe, this distance will be reflected by the movement of the connecting band 21 on the surface of the fixed roller 22. At this time, the scale value on the connecting band 21 on the surface of the fixed roller 22 is read, which is directly the depth of the broken drill pipe in the drill hole, so that the depth value can be directly read during the process of taking out the broken drill pipe outside without the need for additional depth gauge or additional calculation to obtain the depth value of the broken drill pipe.
[0023] Wherein, after the drill rod body 1 is broken, the drill rod on the outside of the drill hole is pulled out first, at this time the connecting rope 2 is limited by the broken drill rod inside the drill hole and will not be pulled out together with the outside drill rod, after the outside drill rod is pulled out, the connecting rope 2 will be in a state of being drawn out of the drill hole and hanging at one end at the drill hole, at this time the broken drill rod deep in the drill hole needs to be taken out, that is, the connecting rope 2 outside the drill hole is inserted into the guide sleeve 3, the guide sleeve 3 is slid on the surface of the connecting rope 2 by the guidance of the connecting rope 2, and is inserted into the drill hole, so that the head end of the guide sleeve 3 can more easily capture the broken drill rod in the drill hole, the guide sleeve 3 and the broken drill rod form a temporary whole, and the connecting rope 2 is clamped by the clamping assembly, and the guide sleeve 3 can be pulled out together with the connecting rope 2 and the broken drill rod from the drill hole.
[0024] As shown in Figure 3 and Figure 4 In this embodiment, the inner wall of the connecting part 11 is provided with a threaded groove, and a plug 23 is threadedly connected in the threaded groove, one side of the plug 23 is fixedly connected with a rotating strip 232, the plug 23 is driven to rotate through the rotating strip 232, and the plug 23 is tightened through the thread to tightly abut against the connecting rope 2 and the connecting belt 21, so that the two are prevented from moving out of position in the normal state and affecting the subsequent depth judgment.
[0025] The plug 23 is fixedly connected with an extrusion block 231 on the side close to the fixed roller 22, and the extrusion block 231 is a silicone rubber block, which can be used to improve the abutting friction and strengthen the fixing effect.
[0026] Wherein, the connecting rope 2 is a steel wire rope, which has high strength and high toughness and is not easy to break with the breakage of the drill rod body 1, further, the connecting rope 2 is arranged at the center position of the drill rod body 1, and the drill rod breakage stress is not easy to break or damage the connecting rope 2, the connecting belt 21 is a brittle plastic belt, which is more easy to break with the breakage of the drill rod, so that the broken position of the drill rod body 1 can be more intuitively displayed through the broken scale groove 211.
[0027] As shown in Figure 6As shown, in one embodiment, the clamping assembly includes an inner sleeve A31 threadedly connected within the guide sleeve 3. A protrusion 311 is fixedly connected to the inner wall of the inner sleeve A31. A plurality of clamping plates 312 adapted to the connecting rope 2 are hinged to the inner wall of the guide sleeve 3. The clamping plates 312 are inclined. Specifically, when the guide sleeve 3 is fitted onto the surface of the connecting rope 2 and inserted into the borehole, and the guide of the connecting rope 2 approaches the broken drill rod according to the depth data, the guide sleeve 3 abuts against the surface of the broken drill rod. At this time, by rotating the inner sleeve A31 outside the borehole, its thread is pushed forward, and it cooperates with... The protrusions 311 on its inner wall press against the clamping plate 312, causing several clamping plates 312 to move toward the direction of the connecting rope 2 and press against the surface of the connecting rope 2. Since the connecting rope 2 is a steel wire rope, there are steel wire braided grooves on its surface, which makes it easier to increase the friction, so that several clamping plates 312 are tightly clamped to the surface of the steel wire rope. Then, by pulling outward through the guide sleeve 3, the drill rod located deep in the borehole is pulled outward with the help of the clamping force between the clamping plate 312 and the steel wire rope. Since the guide sleeve 3 is pressed against the surface of the broken drill rod, it provides guidance for its removal from the borehole, avoiding the irregular breakage position of the broken drill rod from getting stuck in the borehole.
[0028] Furthermore, a torsion spring is provided at the hinge point between the clamping plate 312 and the inner wall of the guide sleeve 3. The torsional force of the torsion spring will bring a force to the clamping plate 312 that is always directed away from the connecting rope 2. This can prevent the clamping plate 312 from contacting the connecting rope 2 and causing inconvenience to its movement when the guide sleeve 3 moves on the surface of the connecting rope 2. Then, by rotating the inner sleeve A31, its internal protrusion 311 is pressed tightly against the clamping plate 312, causing it to rotate and clamp tightly on the surface of the connecting rope 2, thus completing the fixation.
[0029] like Figure 7 As shown, in one parallel embodiment, the clamping assembly includes an inner sleeve B32 threadedly connected to the guide sleeve 3, a conical tooth block 321 fixedly connected to the inner wall of the inner sleeve B32, a clamping sleeve 322 adapted to the connecting rope 2 is provided inside the guide sleeve 3, a clamping groove 323 is provided on the surface of the clamping sleeve 322, and a threaded groove adapted to the conical tooth block 321 is provided on the surface of the clamping sleeve 322.
[0030] Specifically, by rotating the inner sleeve B32, the threaded thrust of the inner sleeve pushes the conical block 321 to gradually tighten on the surface of the sleeve 322. Since the inner wall of the conical block 321 is obliquely conical, its inner diameter will shrink as it rotates on the surface of the sleeve 322, thereby squeezing the sleeve 322. Since the surface of the sleeve 322 is provided with a clamping groove 323, the clamping groove 323 gradually shrinks under pressure, thereby reducing its inner diameter and clamping it on the surface of the connecting rope 2, thus completing the clamping and fixing.
[0031] The guide sleeve 3 is provided with a protective sleeve 33 near one end of the drill pipe body 1, the protective sleeve 33 is a rubber sleeve, the protective sleeve 33 is adhered to the surface of the guide sleeve 3 in the normal state, and when the broken drill pipe is pulled out, the protective sleeve 33 is stripped from the surface of the guide sleeve 3 under the influence of the frictional resistance of the borehole wall, and then is reversely sleeved on the surface of the broken position of the drill pipe body 1, hides the irregular surface of the broken position of the drill pipe body 1, avoids that the irregular surface is easily stuck in the borehole wall position, and provides convenience for pulling out the broken drill pipe.
[0032] The drill bit 12 is arranged at the end of the drill pipe body 1 away from the connecting part 11, the drill bit 12 is selected according to different rock wall characteristics and drilling depth, and is used for continuous pushing during drilling.
[0033] The contents not described in detail in the description belong to the prior art known by the person skilled in the art, although the present application is described in detail with reference to the foregoing embodiments, the person skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A device for assisted extraction of a broken drill rod from a drilling hole, comprising a drill rod body (1) and a guide sleeve (3), characterized in that, The drill rod body (1) is provided with a connecting part (11) at one end for connecting with a drilling machine, connecting ropes (2) and connecting belts (21) are respectively arranged in the drill rod body (1), the connecting part (11) is rotatably connected with a fixed roller (22), the connecting belts (21) are connected with the connecting ropes (2) after passing through the fixed roller (22), and a plurality of scale grooves (211) are arranged on the surfaces of the connecting belts (21). The guide sleeve (3) can be sleeved on the surface of the connecting rope (2) and guided to the position close to the drill rod body (1) along the surface of the connecting rope (2), the guide sleeve (3) is provided with a clamping assembly for fixing the connecting rope (2), and when the clamping assembly is clamped on the surface of the connecting rope (2), the connecting rope (2) is pulled out of the drill hole together with the broken drill rod by pulling the guide sleeve (3) outward.
2. A device for assisting in the extraction of a broken drill pipe from a drilling hole according to claim 1, characterized in that: The inner wall of the connecting part (11) is provided with a threaded groove, and a plug (23) is threadedly connected in the threaded groove.
3. A device for assisting in the extraction of a broken drill pipe from a drilling hole according to claim 2, characterized in that: The side of the plug (23) close to the fixed roller (22) is fixedly connected with an extrusion block (231).
4. A device for assisting in the extraction of a broken drill pipe from a drilling hole according to claim 1, characterized in that: The connecting rope (2) is a steel wire rope, and the connecting belt (21) is a brittle plastic belt.
5. A device for assisting in the extraction of a broken drill pipe from a drilling hole according to any one of claims 1-4, characterized in that: The clamping assembly comprises an inner sleeve A (31) threadedly connected in the guide sleeve (3), the inner wall of the inner sleeve A (31) is fixedly connected with a protruding block (311), a plurality of clamping plates (312) matched with the connecting rope (2) are hingedly connected to the inner wall of the guide sleeve (3), and the clamping plates (312) are arranged in an inclined mode.
6. A device for assisting in the extraction of a broken drill pipe from a drilling hole according to claim 5, characterized in that: The hinging points of the clamping plates (312) and the inner wall of the guide sleeve (3) are provided with torsion springs.
7. A device for assisting in the extraction of a broken drill pipe from a drilling hole according to claim 5, characterized in that: The clamping assembly comprises an inner sleeve B (32) threadedly connected in the guide sleeve (3), the inner wall of the inner sleeve B (32) is fixedly connected with a bevel gear block (321), a clamping sleeve (322) matched with the connecting rope (2) is arranged in the guide sleeve (3), and a clamping groove (323) is formed in the surface of the clamping sleeve (322).
8. A device for assisting in the extraction of a broken drill pipe from a drilling hole according to claim 7, characterized in that: The surface of the clamping sleeve (322) is provided with a threaded groove matched with the bevel gear block (321).
9. A device for assisting in the extraction of a broken drill pipe from a drilling hole according to claim 1, characterized in that: The end of the guide sleeve (3) close to the drill rod body (1) is provided with a protective sleeve (33), and the protective sleeve (33) is a rubber sleeve.
10. A device for assisting in the extraction of a broken drill pipe from a drilling hole according to claim 1, characterized in that: The end of the drill rod body (1) away from the connecting part (11) is provided with a drill bit (12).