Device for removing scale and mud from drill pipe in drilling diamond wire-line coring

Abstract

This invention discloses a rapid scale and mud removal device for diamond wireline coring drilling, comprising a scale and mud removal device body and an auxiliary retrieval and lifting device used in conjunction with it. The scale and mud removal device body includes: a support frame with a mounting groove and a pin hole; two mud scrapers rotatably connected to both sides of the mounting groove via pins and pin holes; a counterweight with its lower end threadedly connected to the upper end of the support frame; and a free rotator with its lower end threadedly connected to the upper part of the counterweight. A spring is also connected between the upper parts of the two mud scrapers. A detachable shrink sleeve is also fitted to the outer side of the upper part of the support frame and the two mud scrapers. This invention provides a simple, safe, reliable, and rapid solution for scale and mud buildup on drill rods, limiting its impact to a controllable range, reducing time costs, and improving drilling efficiency.

Description

Technical Field

[0001] This invention relates to a device for removing scale and mud from the inner wall of drill pipes, specifically a device for quickly removing scale and mud from drill pipes used in diamond wireline coring drilling, belonging to the technical field of diamond wireline coring construction for solid mineral drilling projects. Background Technology

[0002] Generally, during diamond wireline coring drilling in solid mineral drilling projects, mud cake formation frequently occurs on the inner wall of the drill pipe due to the increased solid content of the drilling fluid. The size of the mud cake on the inner wall of the drill pipe has a significant impact on the retrieval of the core tube during diamond wireline coring drilling. The length of the mud cake on the inner wall of the drill pipe can range from tens of meters to hundreds of meters in severe cases; the thickness of the mud cake can range from a few millimeters to more than 10 millimeters in severe cases. Mud cake on the inner wall of the drill pipe will hinder the normal descent of the retrieval tool inside the drill pipe, affecting the retrieval of the core tube, significantly increasing the time and cost of auxiliary drilling work, and also seriously affecting the drilling progress and time. If mud cake formation occurs frequently, it will seriously affect the drilling efficiency.

[0003] Currently, there is a lack of rapid, simple, and effective methods for dealing with mud scale buildup on the inner wall of drill pipes during diamond wireline coring drilling. In the drilling field, when mud scale buildup occurs on the inner wall of drill pipes during diamond wireline coring drilling, the conventional method of extracting the drill pipe to remove the scale is often used. However, this method is affected by factors such as hole depth and the amount of scale, resulting in complex operation, high labor intensity, and safety hazards.

[0004] Therefore, developing a simple and practical device for quickly removing scale and mud from drill pipes used in diamond wireline coring drilling is the key to solving the above-mentioned technical problems. Summary of the Invention

[0005] In view of the many defects and shortcomings of the above-mentioned background technology, the present invention has made improvements and innovations, aiming to provide a solution that can quickly and effectively solve the problem of scale and mud skin on drill rods in a simple, safe and reliable manner, thereby limiting its impact to a controllable range, reducing time costs, and improving drilling efficiency.

[0006] Another objective of this invention is to use the main body of the scale and mud removal device to repeatedly lift and scrape away the scale and mud on the drill rod using an auxiliary retrieval and lifting device, thereby achieving rapid removal of scale and mud on the drill rod during diamond wireline coring drilling without lifting the drill.

[0007] To solve the above problems and achieve the above-mentioned objectives, the present invention provides a rapid drill rod descaling and desliming device for diamond wireline coring drilling, which is implemented by adopting the following design structure and the following technical solution:

[0008] A rapid descaling and mud removal device for diamond wireline coring drilling includes a main body for descaling and mud removal and an auxiliary retrieval and lifting device used in conjunction with it. The main body of the descaling and mud removal device includes:

[0009] The support frame (1) has a mounting groove (11) and a pin hole (12);

[0010] Two mud scraper hooks (2) are rotatably connected to both sides of the mounting groove (11) via pins (3) and pin holes (12);

[0011] The lower end of the hammer (4) is threaded to the upper end of the support frame (1);

[0012] The lower end of the free rotator (5) is threaded to the upper part of the weight (4);

[0013] Among them, a spring (6) is connected between the upper parts of the two mud scraper hooks (2); the support frame (1) and the upper outer side of the two mud scraper hooks (2) are also fitted with a detachable shrink sleeve (7).

[0014] Preferably, the auxiliary salvage and lifting device includes:

[0015] The cable core-collecting winch (8) uses an external power supply as an auxiliary lifting winch.

[0016] The salvage wire rope (9) is wound around one end and installed on the drum of the rope core-taking winch (8), and the other end of the salvage wire rope (9) is braided and installed on the wire rope clamp (10).

[0017] The wire rope clamp (10) is threadedly connected to the upper end of the free rotator (5).

[0018] Preferably, the mounting groove (11) is vertically opened through the middle of the support frame (1), the lower part of the support frame (1) is provided with a recessed ring in the inward circumferential direction, and the upper end of the support frame (1) is provided with an internal thread section for connecting with the counterweight (4), wherein the pin hole (12) is opened through the middle of the support frame (1).

[0019] Preferably, the upper part of the support frame (1) is a cone shape that is smaller at the top and larger at the bottom and fits the shrink sleeve (7). The upper end of the cone shape is connected to a cylindrical connecting part that is connected to the weight (4).

[0020] Preferably, the mud scraper hook (2) has an overall elongated structure. The outer side of the upper end of the mud scraper hook (2) has the same oblique conical surface as the upper part of the support frame (1). The inner side of the upper end of the mud scraper hook (2) is provided with a positioning pin (21) for positioning the spring (6). The lower end of the mud scraper hook (2) is provided with a round protrusion (22) for scraping mud. The inner side of the middle part of the mud scraper hook (2) is provided with a connecting ring (23) that works with the pin (3).

[0021] Preferably, the hammer (4) is a solid cylindrical structure. The upper end of the hammer (4) is provided with an internal threaded hole that is threaded to the free rotator (5). The lower middle part of the hammer (4) is connected to an external threaded connecting column that is threaded to the support frame (1). The internal threaded hole of the hammer is a tapered threaded hole with a larger inner diameter at the top and a smaller inner diameter at the bottom.

[0022] Preferably, the free rotator (5) comprises:

[0023] The connecting shaft (51) has an external thread section on the upper outer side and an external thread section for installing a locking groove nut (53) at the lower bottom.

[0024] Bearing (52);

[0025] A slotted nut (53) is installed on the external thread section at the bottom of the lower part of the connecting shaft (51);

[0026] The lower part of the shaft sleeve (54) is provided with an external thread section for connecting with the internal threaded hole at the upper end of the counterweight (4).

[0027] Preferably, the upper outer side of the connecting shaft (51) is provided with a connecting shaft external thread section for use in conjunction with the wire rope sleeve (10) of the auxiliary salvage and lifting device. The connecting shaft (51) is installed with a shaft sleeve (54), a bearing (52) and a groove nut (53) from top to bottom.

[0028] Preferably, the pin (3) is an elastic pin, which passes sequentially through the connecting ring (23) of the two mud scrapers to rotatably connect the two mud scrapers (2) to the support frame (1).

[0029] Preferably, the shrink sleeve (7) is a hollow sleeve in whole, wherein a slanted groove is provided on one side of the shrink sleeve (7) through the side wall.

[0030] The beneficial effects of this invention compared to the prior art are:

[0031] 1. This invention is simple to operate, safe and reliable, and can quickly and effectively solve the problem of scale and mud skin on drill rods, limiting its impact to a controllable range, reducing auxiliary time and improving construction efficiency;

[0032] 2. The present invention can use an auxiliary retrieval and lifting device to repeatedly lift and scrape away the scale and mud on the drill rod according to the actual use, so as to quickly eliminate the scale and mud on the drill rod during diamond wireline coring without lifting the drill.

[0033] 3. This invention is easy to operate, the time is easy to control (it can be used in conjunction with an auxiliary retrieval and lifting device), and it is highly efficient, thus effectively eliminating the influence of scale and mud on the drill rod.

[0034] 4. This invention eliminates the need to pull the entire core drilling rod with scale and mud buildup on the inner wall out of the well, effectively reducing operation time and labor intensity. Its time utilization efficiency increases significantly with the extension of drilling depth.

[0035] 5. The specifications of the scale and mud removal device can be adapted to the actual use to achieve the scale and mud removal operation during diamond wire coring drilling of different specifications. Attached Figure Description

[0036] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0037] Figure 1 This is a state diagram of the device for removing scale and sludge from inside the drill pipe according to the present invention;

[0038] Figure 2 This is a diagram showing the working state of the scaling and sludge removal device of the present invention in its extended and lifting position.

[0039] Figure 3 This is a schematic diagram of the operation of the auxiliary salvage and lifting device of the present invention;

[0040] Figure 4 This is one of the usage state diagrams of the present invention;

[0041] Figure 5 This is the second usage state diagram of the present invention;

[0042] Figure 6 This is the third usage state diagram of the present invention;

[0043] Figure 7 This is the fourth diagram showing the usage state of the present invention;

[0044] Figure 8 This is a cross-sectional view of the invention in its contracted state.

[0045] Figure 9 This is a cross-sectional view of the present invention in its extended state.

[0046] Figure 10 This is a schematic diagram of the overall structure of the present invention;

[0047] Figure 11 This is an exploded structural diagram of the present invention;

[0048] Figure 12 This is a schematic diagram of the overall structure of the support frame (1) component of the present invention;

[0049] Figure 13 This is a cross-sectional schematic diagram of the support frame (1) component of the present invention;

[0050] Figure 14 This is a schematic diagram of the overall structure of the mud scraper hook (2) component of the present invention;

[0051] Figure 15 This is a plan view of the mud scraper hook (2) component of the present invention;

[0052] Figure 16 This is a schematic diagram of the overall structure of the counterweight (4) component of the present invention;

[0053] Figure 17 This is a cross-sectional schematic diagram of the counterweight (4) component of the present invention;

[0054] Figure 18 This is a schematic diagram of the overall structure of the free rotator (5) component of the present invention;

[0055] Figure 19 This is a cross-sectional schematic diagram of the free rotator (5) component of the present invention;

[0056] In the figure, the numbers are: 1—support frame, 11—mounting groove, 12—pin hole;

[0057] 2—scraper hook, 21—positioning pin, 22—protrusion, 23—connecting ring, 3—pin;

[0058] 4—Heavy hammer;

[0059] 5—Free rotator, 51—Connecting shaft, 42—Bearing, 43—Slotted nut, 54—Shaft sleeve;

[0060] 6—Spring;

[0061] 7—Shrink sleeve;

[0062] 8—Rope coring winch;

[0063] 9—Retrieve the steel wire rope;

[0064] 10—Wire rope clamp;

[0065] 10a—Scaled drill pipe. Detailed Implementation

[0066] To make the technical means, inventive features, objectives, and effects of this invention readily understandable, the technical solution of this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0067] The drilling diamond wire coring device for rapid descaling and mud removal, as shown in the attached diagram, includes a main body for descaling and mud removal and an auxiliary retrieval and lifting device used in conjunction with it. The main body of the descaling and mud removal device includes:

[0068] Support frame 1, the support frame 1 has a mounting groove 11 and a pin hole 12;

[0069] Two mud scraper hooks 2 are rotatably connected to both sides of the mounting groove 11 via pins 3 and pin holes 12.

[0070] The lower end of the counterweight 4 is threadedly connected to the upper end of the support frame 1.

[0071] The lower end of the free rotator 5 is threadedly connected to the upper part of the counterweight 4.

[0072] Among them, a spring 6 is connected between the upper parts of the two mud scraper hooks 2; and a removable shrink sleeve 7 is adapted to be connected to the upper outer side of the support frame 1 and the two mud scraper hooks 2.

[0073] In this invention, when the shrink sleeve 7 is not fitted on the outer side of the upper part of the two mud scraping hooks 2, the lower part of the two mud scraping hooks 2 is supported by the spring 6 and is in a shrinking state. When the shrink sleeve 7 is fitted on the upper oblique conical surface of the mud scraping hook 2, the lower round protrusion 22 of the mud scraping hook 2 is in an extended mud scraping state.

[0074] Furthermore, the auxiliary salvage and lifting device includes:

[0075] The cable core-collecting winch 8 uses an external power supply as an auxiliary lifting winch.

[0076] The salvage wire rope 9 is wound around and installed on the drum of the rope core-finding winch 8, and the other end of the salvage wire rope 9 is braided and installed on the wire rope clamp 10.

[0077] The wire rope clamp 10 is threadedly connected to the upper end of the free rotator 5.

[0078] In this invention, the free rotator 5 is used to connect the wire rope clamp 10 and the counterweight 4 when performing scale and sludge removal work.

[0079] Furthermore, the mounting groove 11 is vertically opened through the middle of the support frame 1, the lower part of the support frame 1 is provided with a recessed ring in the inward circumferential direction, and the upper end of the support frame 1 is provided with an internal thread section for connecting with the counterweight 4, wherein the pin hole 12 is opened through the middle of the support frame 1.

[0080] Specifically, the upper part of the support frame 1 is a cone shape that is smaller at the top and larger at the bottom and fits the shrink sleeve 7. The upper end of the cone shape is connected to a cylindrical connecting part that is connected to the counterweight 4.

[0081] Furthermore, the mud scraper hook 2 has an overall elongated structure. The outer side of the upper end of the mud scraper hook 2 has the same oblique conical surface as the upper part of the support frame 1. The inner side of the upper end of the mud scraper hook 2 is provided with a positioning pin 21 for positioning the spring 6. The lower end of the mud scraper hook 2 is provided with a round protrusion 22 for scraping mud. The inner side of the middle part of the mud scraper hook 2 is provided with a connecting ring 23 that works with the pin 3 to complete the work.

[0082] Furthermore, the hammer 4 is a solid cylindrical structure. The upper end of the hammer 4 is provided with an internal threaded hole that is threaded to the free rotator 5. The lower middle part of the hammer 4 extends and is connected to an external threaded connecting column that is threaded to the support frame 1. The hammer threaded hole is a tapered threaded hole with a larger inner diameter at the top and a smaller inner diameter at the bottom.

[0083] Furthermore, the free rotator 5 includes:

[0084] The connecting shaft 51 has an external thread section on its upper outer side and an external thread section on its lower bottom end for installing a locking groove nut 53.

[0085] Bearing 52;

[0086] The slotted nut 53 is installed on the external thread section at the bottom of the lower part of the connecting shaft 51;

[0087] The shaft sleeve 54 has a threaded connection post at its lower part for connecting with the internal threaded hole at the upper end of the counterweight 4.

[0088] In this invention, the free rotator 5 is a composite structure consisting of a connecting shaft 51, a bearing 52, a grooved nut 53, and a shaft sleeve 54.

[0089] Furthermore, the upper outer side of the connecting shaft 51 is provided with an external thread section for use in conjunction with the wire rope sleeve 10 of the auxiliary salvage and lifting device. The connecting shaft 51 is installed with a shaft sleeve 54, a bearing 52 and a groove nut 53 in sequence from top to bottom.

[0090] Furthermore, the pin 3 is an elastic pin, which sequentially passes through the connecting ring 23 of the two mud scrapers to rotatably connect the two mud scrapers 2 to the support frame 1.

[0091] Furthermore, the shrink sleeve 7 is an internally hollow sleeve, wherein a slanted groove is provided on one side of the shrink sleeve 7 through the side wall.

[0092] In summary, a more specific embodiment of the present invention is as follows:

[0093] Before using the aforementioned design structure for the rapid descaling and mud removal device for diamond wire coring drilling, it needs to be manufactured and installed as a backup.

[0094] The specific installation steps are as follows: First, the two mud scraper hooks 2 are rotatably connected to both sides of the mounting groove 11 opened in the support frame 1 through the cooperation of the pin 3 and the pin hole 12. It is necessary to manually test the free and flexible state of the contraction and extension between the two mud scraper hooks 2 and the mounting groove 11.

[0095] Then, connect and tighten the external threaded connecting column at the lower end of the counterweight 4 to the internal threaded section of the cylindrical connecting part at the upper end of the support frame 1.

[0096] Next, the shaft sleeve 54 and bearing 52 of the free rotator 5 are sequentially fitted onto the connecting shaft 51 from top to bottom. Then, the slotted nut 53 is threaded to the lower thread of the connecting shaft 51. The installation is completed to lock the gap between the shaft sleeve 54, bearing 52 and connecting shaft 51 while allowing them to rotate freely relative to each other.

[0097] Next, connect the lower thread of the shaft sleeve 54 of the free rotator 5 to the upper thread of the hammer 4 to complete the installation of the body of the scale and sludge removal device. Then, use the shrink sleeve 7 to test the shrinkage and extension scraping state of the two scraping hooks 2.

[0098] Finally, before operation, check and maintain the auxiliary salvage and lifting device's core winch 8, salvage wire rope 9, and wire rope clamp 10 to ensure they are in good working order and ready for use.

[0099] The specific operating steps are as follows:

[0100] Step 1: During the drilling process of diamond wireline coring, if mud and scale form on the inner wall of the drill pipe, and the wireline coring retrieval device cannot be lowered normally to retrieve the inner tube of the coring device due to the obstruction of the mud and scale, the retrieval device is pulled out of the wellhead and the wire rope clamp at the bottom of the wire rope is disconnected from the retrieval device.

[0101] Step 2: Insert the retractable sleeve 7 along the wire rope clamp 10 into the salvage wire rope 9 for use;

[0102] Step 3: Securely connect the upper external thread of the connecting shaft 51 of the prepared scale and sludge removal device body and the free rotator 5 to the wire rope ferrule 10, and check the flexibility.

[0103] Step 4: Lower the body of the scale removal device along the scaled drill rod 10a at the wellhead using the retrieval wire rope 9. When it reaches the scaled section of the drill rod, the body of the scale removal device can be lifted up and down. The scraper hook 2 will be in a retracted state. It will be smoothly lowered into the center hole to reach the scale-free section of the well. In this step, it is important to note that the retractable sleeve 7 should be suspended at the wellhead and should not be placed inside the drill rod.

[0104] Step 5: When the body of the scale and mud removal device reaches the scale-free section of the well and confirms that it is safe to remove scale and mud, the shrink sleeve 7 is lowered along the inner hole of the scale drill rod 10a and the retrieval wire rope 9. The shrink sleeve 7 falls freely under its own weight to the inclined surface of the mud scraping hook 2 of the body of the scale and mud removal device. The shrink sleeve 7 reliably acts on the outer inclined cone surface of the upper end of the mud scraping hook 2 under its own weight, thereby extending and opening the mud scraping hook 2 to the mud scraping state.

[0105] Furthermore, the auxiliary retrieval and lifting device rope core-taking winch 8 is used to lift the retrieval wire rope 9, the body of the scale and mud removal device, and the mud scraping hook 2. Under the lifting power of the auxiliary retrieval and lifting device rope core-taking winch 8, the mud scraping hook 2 is in the extended mud scraping state and is lifted up with the retrieval wire rope 9 to perform mud scraping work.

[0106] Furthermore, after the scale and mud removal device body and the mud scraper hook 2 are raised to the wellhead, the shrink sleeve 7 is suspended at the wellhead. The scale and mud removal device body and the mud scraper hook 2 are lowered along the scale drill pipe 10a to the scale-free section of the well. Following the above work procedure, the shrink sleeve 7 is lowered, the mud scraper hook 2 is extended to the mud scraping state, and the wireline core winch 8 is started to lift the scale and mud removal device body and the mud scraper hook 2 to perform mud scraping work. To ensure thorough mud scraping, the mud scraping work can be repeated multiple times.

[0107] Furthermore, after the sludge scraping work is completed, the main body of the scale and sludge removal device is disassembled from the threaded part of the wire rope clamp 10.

[0108] Further, reconnect the rope core retrieval device to the wire rope clamp 10 and lower it to retrieve the inner core tube. If the retrieval device cannot be lowered smoothly, continue to implement the above operation steps until the retrieval device can be lowered smoothly to retrieve the inner core tube.

[0109] Finally, the main support frame 1, two sludge scraper hooks 2, weight 4, free rotator 5, and shrink sleeve 7 of the scale and sludge removal device are disassembled, separated, and oiled for maintenance in preparation for the next use.

[0110] Throughout the entire implementation process described above, the support frame 1 is provided with an installation groove 11 and a pin hole 12; two mud scraper hooks 2 are rotatably connected to both sides of the installation groove 11 via pins 3 and pin holes 12; a counterweight 4 is threadedly connected to the upper end of the support frame 1; a free rotator 5 is threadedly connected to the upper part of the counterweight 4; a spring 6 is also connected between the upper parts of the two mud scraper hooks 2; and a detachable shrink sleeve 7 is adapted to the outer side of the upper part of the support frame 1 and the two mud scraper hooks 2.

[0111] Furthermore, in this invention, when the shrink sleeve 7 is not fitted on the upper outer side of the two mud scraping hooks 2, the lower part of the two mud scraping hooks 2 is supported by the spring 6 and is in a shrinking state. When the shrink sleeve 7 is fitted on the upper inclined surface of the mud scraping hook 2, the lower round protrusion 22 of the mud scraping hook 2 is in an extended mud scraping state.

[0112] Furthermore, the auxiliary salvage and lifting device includes a rope core-taking winch 8, a salvage wire rope 9, and a wire rope clamp 10; the rope core-taking winch 8 uses an external power supply as an auxiliary lifting winch, one end of the salvage wire rope 9 is wound and installed on the drum of the rope core-taking winch 8, and the wire rope clamp 10 is braided and installed on the other end of the salvage wire rope 9.

[0113] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A device for quickly removing scale and mud from drill pipe in diamond wire-line coring drilling, comprising a scale and mud skin removing device body and an auxiliary fishing and lifting device used in conjunction therewith, characterized in that, The main body of the scale and sludge removal device includes: The support frame (1) has a mounting groove (11) and a pin hole (12). Two mud scraper hooks (2) are rotatably connected to both sides of the mounting groove (11) via pins (3) and pin holes (12); The lower end of the hammer (4) is threaded to the upper end of the support frame (1); The lower end of the free rotator (5) is threaded to the upper part of the weight (4); Among them, a spring (6) is connected between the upper parts of the two mud scraper hooks (2); the support frame (1) and the upper outer side of the two mud scraper hooks (2) are also fitted with a detachable shrink sleeve (7).

2. The device for quickly removing scale and sludge from the drill pipe in the diamond rope core drilling rig according to claim 1, characterized in that, The auxiliary salvage and lifting device includes: The cable core-collecting winch (8) uses an external power supply as an auxiliary lifting winch. The salvage wire rope (9) is wound around one end and installed on the drum of the rope core-taking winch (8), and the other end of the salvage wire rope (9) is braided and installed on the wire rope clamp (10); The wire rope clamp (10) is threadedly connected to the upper end of the free rotator (5).

3. The device for rapidly removing scale and mud from drill pipes for diamond wire coring drilling according to claim 1, characterized in that, The mounting groove (11) is vertically opened through the middle of the support frame (1). The lower part of the support frame (1) is provided with a recessed ring in the inward direction. The upper end of the support frame (1) is provided with an internal thread section for connecting with the counterweight (4). The pin hole (12) is opened through the middle of the support frame (1).

4. The rapid descaling and desliming device for diamond wire coring drilling according to claim 3, characterized in that, The upper part of the support frame (1) is a cone shape that is smaller at the top and larger at the bottom and fits the shrink sleeve (7). The upper end of the cone shape is connected to a cylindrical connecting part that is connected to the weight (4).

5. The rapid descaling and desliming device for diamond wire coring drilling according to claim 1, characterized in that, The mud scraper hook (2) is a long strip structure. The outer side of the upper end of the mud scraper hook (2) is the same as the upper part of the support frame (1). The inner side of the upper end of the mud scraper hook (2) is provided with a positioning pin (21) for positioning the spring (6). The lower end of the mud scraper hook (2) is provided with a round protrusion (22) for scraping mud. The inner side of the middle part of the mud scraper hook (2) is provided with a connecting ring (23) that works with the pin (3).

6. The device for rapidly removing scale and mud from drill pipes for diamond wire coring drilling according to claim 1, characterized in that, The hammer (4) is a solid cylindrical structure. The upper end of the hammer (4) is provided with an internal threaded hole that is threaded to the free rotator (5). The lower middle part of the hammer (4) is connected to an external threaded connecting column that is threaded to the support frame (1). The internal threaded hole of the hammer is a tapered threaded hole with a larger inner diameter at the top and a smaller inner diameter at the bottom.

7. The device for rapidly removing scale and mud from drill pipes for diamond wire coring drilling according to claim 1, characterized in that, The free rotator (5) includes: The connecting shaft (51) has an external thread section on the upper outer side and an external thread section for installing a locking groove nut (53) at the lower bottom. Bearing (52); A slotted nut (53) is installed on the external thread section at the bottom of the lower part of the connecting shaft (51); The lower part of the shaft sleeve (54) is provided with an external thread section for connecting with the internal thread hole at the upper end of the counterweight (4).

8. The rapid descaling and desliming device for diamond wire coring drilling according to claim 7, characterized in that, The upper outer side of the connecting shaft (51) is provided with a connecting shaft external thread section for use in conjunction with the wire rope sleeve (10) of the auxiliary salvage and lifting device. The connecting shaft (51) is installed with a shaft sleeve (54), a bearing (52) and a groove nut (53) from top to bottom.

9. The device for rapidly removing scale and mud from drill pipes for diamond wire coring drilling according to claim 1, characterized in that, The pin (3) is an elastic pin, which passes through the connecting ring (23) of the two mud scrapers in sequence to rotatably connect the two mud scrapers (2) to the support frame (1).

10. The device for rapidly removing scale and mud from drill pipes for diamond wire coring drilling according to claim 1, characterized in that, The shrink sleeve (7) is a hollow sleeve in whole, wherein a slanted groove is provided on one side of the shrink sleeve (7) through the side wall.

Images