阅读说明：本技术 外螺旋打捞筒 (External spiral fishing barrel ) 是由 史义 耿存洁 史超 董向阳 杨辉 包兴朝 王利超 孙儒 于 2021-02-05 设计创作，主要内容包括：本发明提供了一种外螺旋打捞筒,属于管道铺设设备技术领域,包括用于连接水平定向钻机的钻杆和连接在钻杆上靠近钻机一端的套筒；钻杆上设有螺旋叶片,螺旋叶片远离钻机的一端设有用于破碎金属异物的刀头；套筒与钻杆之间形成容纳腔,且套筒的长度小于钻杆的长度,套筒远离钻机的一端开设有与容纳腔连通的进浆口,套筒的侧壁上开设有与容纳腔连通的排浆孔。本发明提供的外螺旋打捞筒,利用钻杆上的螺旋叶片将刀头钩挂到的金属异物收集输送到套筒内部,再由套筒带出,解决了孔道内的金属异物损伤穿越器具及管道的问题,且本装置结构简单,使用方便。(The invention provides an external spiral overshot, which belongs to the technical field of pipeline laying equipment and comprises a drill rod and a sleeve, wherein the drill rod is used for being connected with a horizontal directional drilling machine, and the sleeve is connected to one end, close to the drilling machine, of the drill rod; the drill rod is provided with a helical blade, and one end of the helical blade, which is far away from the drilling machine, is provided with a cutter head for crushing metal foreign bodies; form between sleeve and the drilling rod and hold the chamber, and telescopic length is less than the length of drilling rod, and the sleeve is kept away from the one end of rig and is seted up and hold the grout inlet of chamber intercommunication, sets up on the telescopic lateral wall and holds the row's thick liquid hole of chamber intercommunication. According to the external spiral fishing barrel provided by the invention, the metal foreign matters hooked by the tool bit are collected and conveyed into the sleeve by the spiral blade on the drill rod and then are taken out by the sleeve, so that the problem that the metal foreign matters in the hole channel damage the penetrating device and the pipeline is solved, and the external spiral fishing barrel is simple in structure and convenient to use.)

1. External spiral overshot, its characterized in that includes:

the drill rod is used for being connected with a horizontal directional drilling machine, the drill rod is provided with a helical blade, and one end, far away from the drilling machine, of the helical blade is provided with a tool bit for crushing metal foreign bodies;

the sleeve is connected with one end, close to the drilling machine, of the drill rod, an accommodating cavity is formed between the sleeve and the drill rod, the length of the sleeve is smaller than that of the drill rod, a slurry inlet communicated with the accommodating cavity is formed in one end, far away from the drilling machine, of the sleeve, and a slurry discharging hole communicated with the accommodating cavity is formed in the side wall of the sleeve.

2. The outer spiral overshot of claim 1, wherein the helical blade extends outside the sleeve more than three turns.

3. The outer spiral overshot of claim 2, wherein the cutter head is welded perpendicularly to the edge of the helical blade.

4. The outer spiral overshot of claim 3, wherein the number of turns of the helical blade with which the cutter head is mounted is not less than one.

5. The outer spiral overshot of claim 1, wherein the sleeve is connected to the drill rod by a base plate.

6. The outer spiral overshot of claim 5, wherein the mud discharge hole comprises:

the bottom hole is formed in the bottom plate and communicated with the accommodating cavity;

the side hole is formed in the sleeve and used for being connected to the side plate of the bottom plate, and the side hole is communicated with the accommodating cavity.

7. The outer spiral overshot of claim 6, wherein a plurality of said bottom holes are evenly arranged in said bottom plate.

8. The outer spiral overshot of claim 6, wherein the side holes are evenly spaced on the side plate.

9. The outer spiral overshot of claim 8, wherein the side opening is an oblong opening.

10. The outer spiral overshot of claim 1, characterised in that the end of the drill rod is provided with a button for connection to the horizontal directional drilling machine.

Technical Field

The invention belongs to the technical field of pipeline laying equipment, and particularly relates to an external spiral overshot.

Background

The pipe crossing by horizontal directional drilling method is a non-excavation type pipe installation construction method, it utilizes horizontal directional drilling machine to make operation according to the designed track, and after the pilot hole is drilled through, it combines with multistage reaming to obtain the construction method of predicted bore diameter, and is mainly used for laying or renewing water supply, gas, electric power, telecommunication, natural gas and petroleum pipelines.

In the process of crossing by the horizontal directional drilling method, alloy fragments, steel fragments and original underground metal foreign bodies which fall off from the reamer can be remained in the hole channel, and the reamer for next reaming can be damaged to different degrees due to the hard texture of the alloy fragments, the steel fragments and the original underground metal foreign bodies, and even the reamer is seriously damaged, so that reaming fails; or to cut the pipeline when the pipeline is pulled back, resulting in engineering failure.

Disclosure of Invention

The invention aims to provide an external spiral overshot, which aims to solve the problem that residual metal foreign matters in a pore canal can damage a penetrating device and a pipeline.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided an outer spiral overshot comprising:

the drill rod is used for being connected with a horizontal directional drilling machine, the drill rod is provided with a helical blade, and one end, far away from the drilling machine, of the helical blade is provided with a tool bit for crushing metal foreign bodies;

the sleeve is connected with one end, close to the drilling machine, of the drill rod, an accommodating cavity is formed between the sleeve and the drill rod, the length of the sleeve is smaller than that of the drill rod, a slurry inlet communicated with the accommodating cavity is formed in one end, far away from the drilling machine, of the sleeve, and a slurry discharging hole communicated with the accommodating cavity is formed in the side wall of the sleeve.

As another embodiment of the present application, the number of turns of the helical blade extending outside the sleeve is more than three.

As another embodiment of the present application, the cutter head is welded perpendicularly to the edge of the helical blade.

As another embodiment of the present application, the number of turns of the cutter head to which the helical blade is attached is not less than one.

As another embodiment of the present application, the sleeve is connected to the drill rod by a bottom plate.

As another embodiment of the present application, the grout outlet includes:

the bottom hole is formed in the bottom plate and communicated with the accommodating cavity;

the side hole is formed in the sleeve and used for being connected to the side plate of the bottom plate, and the side hole is communicated with the accommodating cavity.

As another embodiment of the present application, the plurality of bottom holes are uniformly arranged on the bottom plate.

As another embodiment of the present application, the side holes are uniformly arranged on the side plate.

As another embodiment of the present application, the side hole is an oblong hole.

As another embodiment of the present application, the end of the drill rod is provided with a button type for connecting the horizontal directional drilling machine.

The external spiral overshot provided by the invention has the beneficial effects that: compared with the prior art, the drilling rod is connected on the rig, stretch into in the drilling with the help of the rig, the metal foreign matter breakage and the hook in the drilling of the last tool bit of helical blade of drilling rod front end to the helical blade on, carry the metal foreign matter through the rotation by the helical blade again and collect the holding chamber in the sleeve, wherein mud and the tiny particle stone in the drilling can be discharged through the row's thick liquid hole that holds the chamber and be connected on the sleeve lateral wall, keep somewhere the metal foreign matter inside the sleeve, take out in the drilling rod until salvaging the completion drilling rod, salvage and accomplish. According to the external spiral fishing barrel provided by the invention, the metal foreign matters hooked by the tool bit are collected and conveyed into the sleeve by the spiral blade on the drill rod and then are taken out by the sleeve, so that the problem that the metal foreign matters in the hole channel damage the penetrating device and the pipeline is solved, and the external spiral fishing barrel is simple in structure and convenient to use.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of an external spiral overshot according to an embodiment of the present invention.

In the figure: 100. a drill stem; 101. a front baffle ring; 102. a rear baffle ring; 103. buckling; 110. a helical blade; 111. a cutter head; 120. a side plate; 121. a side hole; 122. a base plate; 123. a bottom hole; 130. a limiting sleeve; 131. a first reinforcing rib; 132. and a second reinforcing rib.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, the external spiral overshot provided by the present invention will now be described. The outer spiral overshot comprises a drill rod 100 used for being connected with a horizontal directional drilling machine and a sleeve connected to one end, close to the drilling machine, of the drill rod 100; a helical blade 110 is arranged on the drill rod 100, and a cutter head 111 for crushing metal foreign bodies is arranged at one end of the helical blade 110, which is far away from the drilling machine; form between sleeve and the drilling rod 100 and hold the chamber, and telescopic length is less than the length of drilling rod 100, and the sleeve is kept away from the one end of rig and is seted up and hold the grout inlet of chamber intercommunication, offer on the telescopic lateral wall with hold the row's of chamber intercommunication thick liquid hole.

Compared with the prior art, the external spiral fishing barrel provided by the invention has the advantages that the drill rod 100 is connected to a drilling machine and extends into a drill hole by virtue of the drilling machine, the cutter head 111 on the spiral blade 110 at the front end of the drill rod 100 breaks metal foreign matters in the drill hole, then the spiral blade 110 conveys and collects the metal foreign matters into the accommodating cavity in the sleeve through rotation, wherein slurry and small-particle stones in the drill hole are discharged through the slurry discharge hole in the side wall of the sleeve, which is connected with the accommodating cavity, the metal foreign matters are retained in the sleeve until the fishing of the drill rod 100 is completed, and the fishing is completed after the drill rod is taken out of the drill hole. According to the external spiral fishing barrel provided by the invention, the metal foreign matters crushed by the cutter head 111 are collected and conveyed into the sleeve by the spiral blade 110 on the drill rod 100 and then are taken out by the sleeve, so that the problem that the metal foreign matters in a pore passage damage a penetrating device and a pipeline is solved, and the device is simple in structure and convenient to use.

Referring to fig. 1, the number of the helical blades 110 extending out of the sleeve is more than three. In this embodiment, a plurality of turns of helical blades 110 are welded to an end of the drill rod 100 away from the sleeve, a cutting head 111 is connected to a front end of the helical blade 110, and a rear end of the helical blade 110 extends into the sleeve. The number of turns of the helical blade 110 located outside the sleeve is greater than the number of turns of the helical blade 110 located inside the sleeve. The spiral blades 110 located outside the sleeve collect the metallic foreign matters in the pore passages between the spiral blades 110, and then the collected metallic foreign matters are brought into the sleeve by rotation. The extension of the rear end of the spiral blade 110 into the sleeve ensures that the salvaged metal foreign matters are collected in the sleeve. The number of turns of the spiral blade 110 extending outside the sleeve is more than three to collect metallic foreign matter in the hole during the high rotation and advance. When the number of turns of the helical blade 110 is too small, the forward extending speed of the drill rod 100 is too fast, which may affect the collecting effect and reduce the collecting efficiency. When the number of turns of the helical blade 110 is less than three, the distance between every two turns of the helical blade 110 is increased, and small metal objects are easily left in the hole channel, so that incomplete fishing is caused.

Alternatively, the helical blade 110 may be wound around the drill rod 100 for five turns, wherein the number of turns extending into the sleeve is one turn and the number of turns located outside the sleeve is four turns. The spiral blade 110 located outside the sleeve collects the metallic foreign materials in the hole passage in the gap between the spiral blades 110 by the rotation of the drill rod 100, and the collected metallic foreign materials are transported to the inside of the sleeve by the spiral blade 110 as the drill rod 100 advances and rotates. Simultaneously mud and grit in the pore also can get into the sleeve in, wherein mud and the direct discharge of row's thick liquid hole on the sleeve of stone and silt of tiny granule can be passed through to the mud and sand, and the stone of large granule and metallic foreign matter etc. can leave over in the sleeve, carry over the pore by the sleeve again.

Referring to fig. 1, a cutter head 111 is vertically welded to the edge of a helical blade 110 as an embodiment of the external spiral overshot provided by the present invention. In this embodiment, a cutter head 111 is welded on the helical blade 110 at the front end of the drill rod 100, the cutter head 111 is vertically connected to the edge of the helical blade 110, and the cutter head 111 is used for chopping large foreign matters or foreign matters with strange shapes in front during the forward process of the drill rod 100 and hooking the large foreign matters or foreign matters with strange shapes between the helical blades 110, so that the helical blade 110 can collect and convey the foreign matters conveniently. The spiral blade 110 connected to the rear end of the drill rod 100 mainly serves to collect foreign materials broken by the bit 111 and to transport the foreign materials to the inside of the sleeve, and the bit 111 does not need to be welded to the spiral blade 110.

Specifically, the helical blade 110 is a steel blade, the length of the helical blade 110 welded on the drill rod 100 is two thirds of that of the drill rod 100, the length of the sleeve is one half of that of the drill rod 100, and the sleeve is sleeved on the rear end of the drill rod 100. The diameter of the helical blade 110 is less than the diameter of the sleeve and greater than one-half the diameter of the sleeve.

Referring to fig. 1, the number of turns of the cutter head 111 mounted on the helical blade 110 is not less than one, which is a specific embodiment of the external spiral overshot provided by the present invention. In this embodiment, the cutter head 111 is welded to one end of the spiral blade 110 extending out of the sleeve, the blades of the cutter heads 111 are in the same direction as the advancing direction of the drill rod 100, and the number of turns of the spiral blade 110 provided with the cutter head 111 is at least one, so that the spiral blade can completely destroy and hook the foreign matters in the hole. If the number of the cutter bits 111 is small and the number of the spiral blade 110 provided with the cutter bits 111 is less than one, there is a possibility that a part of foreign matters, which are not easily collected, may contact the spiral blade 110 through a side without the cutter bits 111, and in the case where the spiral blade 110 rotates at a high speed, the foreign matters may affect the collection efficiency of the spiral blade 110 and even destroy the structure of the spiral blade 110.

Alternatively, the helical blade 110 is wound around the drill rod 100 for five turns, wherein the number of turns outside the sleeve is four turns, and the number of turns with the bit 111 installed is two turns. The cutter head 111 at the end of the helical blade 110 cuts up and destroys foreign matters which are not easy to collect, and the foreign matters are collected and arranged into the sleeve by the rotating helical blade 110.

Referring to fig. 1, as an embodiment of the external spiral overshot provided by the present invention, the sleeve is connected to the drill pipe 100 by a bottom plate 122. In this embodiment, the sleeve includes a circular bottom plate 122 vertically sleeved on the drill rod 100 and a side plate 120 connected to the bottom plate 122, and the side plate 120 is cylindrical; the bottom plate 122 is a steel plate, the bottom plate 122 is welded on the drill rod 100, the side plate 120 is welded on the edge of the bottom plate 122, and the side plate 120 and the bottom plate 122 enclose to form an accommodating cavity. An opening at one end of the side plate 120 far away from the bottom plate 122 is used as a slurry inlet, and slurry discharge holes are formed in the side plate 120 and the bottom plate 122. After the slurry and the foreign matters in the pore passage enter the sleeve through the slurry inlet, the slurry is discharged through the slurry discharge holes on the side plates 120 and the bottom plate 122, and the residual foreign matters are left in the sleeve and are taken out of the pore passage to finish fishing. The side plates 120 and the bottom plate 122 are provided with slurry discharge holes for circulating slurry to balance the pressure inside and outside the sleeve.

Optionally, the bottom plate 122 is fixed on the drill rod 100 by means of a stop collar 130 sleeved on the drill rod 100, the stop collar 130 is fixedly installed on the drill rod 100, the bottom plate 122 is welded on the stop collar 130, and a first reinforcing rib 131 is arranged between the bottom plate 122 and the stop collar 130 to enhance the stability between the bottom plate 122 and the stop collar 130. The drill rod 100 is respectively provided with a front retaining ring 101 and a rear retaining ring 102, and the stop collar 130 is arranged between the front retaining ring 101 and the rear retaining ring 102. A second reinforcing rib 132 is disposed between the backstop ring 102 and the drill rod 100, and is used for ensuring the overall strength of the backstop ring 102 and the stop collar 130 connected to the backstop ring 102.

Referring to fig. 1, the slurry discharge hole includes a bottom hole 123 formed on the bottom plate 122 and communicated with the accommodating chamber, and a side hole 121 formed on the side plate 120 and communicated with the accommodating chamber. In this embodiment, the sleeve includes a circular bottom plate 122 and a cylindrical side plate 120, the bottom plate 122 is sleeved and connected to the rear end of the drill rod 100, the side plate 120 is welded on the side wall of the bottom plate 122, and an opening of one side of the side plate 120 away from the bottom plate 122 is a slurry inlet; a bottom hole 123 for discharging the slurry is provided on the bottom plate 122, and the slurry entering from the slurry inlet is directly discharged from the bottom hole 123; as the drill pipe 100 rotates and advances, the sleeve fixed on the drill pipe 100 rotates along with the drill pipe 100, mud and foreign matters entering the sleeve from the mud inlet also rotate along with the sleeve and the spiral blade 110, the mud and small-sized stones in the sleeve are discharged through the side hole 121 in the side wall of the sleeve while rotating, and the foreign matters with larger volume are concentrated in the sleeve.

Referring to fig. 1, a plurality of bottom holes 123 are uniformly arranged on a bottom plate 122, which is an embodiment of the external spiral overshot provided by the present invention. In this embodiment, the bottom holes 123 on the bottom plate 122 are a plurality of uniformly distributed circular holes. A plurality of bottom holes 123 are radially disposed on the bottom plate 122 about the drill pipe 100. Optionally, the number of the bottom holes 123 is eight, the eight bottom holes 123 are uniformly distributed on the bottom plate 122 around the drill rod 100, and the distance between the bottom holes 123 and the drill rod 100 is greater than the radius of the bottom holes 123.

As an embodiment of the external spiral overshot provided by the present invention, referring to fig. 1, a plurality of side holes 121 are uniformly arranged on a side plate 120. In this embodiment, on the curb plate 120 that side opening 121 evenly arranged, at the rotatory in-process that advances of drilling rod 100, the sleeve is fixed and can be rotatory along with drilling rod 100 on drilling rod 100, mud and the foreign matter that gets into the sleeve by the grout inlet also can appear rotatoryly along with sleeve and helical blade 110, mud and the stone of tiny granule in the sleeve can be discharged through side opening 121 on the sleeve lateral wall when rotatory, evenly arrange side opening 121 on curb plate 120 and do benefit to mud and the stone of tiny granule to discharge along with the rotation of curb plate 120. Specifically, a plurality of sets of side holes 121 are formed along the length direction of the side plate 120, and each set of side holes 121 is spaced around the side plate 120. Optionally, three sets of side holes 121 are disposed along the length direction of the side plate 120, wherein each set includes five side holes 121, and the distance between each side hole 121 is equal. Specifically, the side holes 121 are oblong holes, and each group of side holes 121 are arranged in a staggered manner.

Referring to fig. 1, as an embodiment of the external spiral overshot provided by the present invention, the end of the drill rod 100 is provided with a button 103 for connecting to a horizontal directional drilling machine. In this embodiment, the end of the drill rod 100 is provided with a button 103, and the drill rod 100 is connected to the drill bit of the drilling machine through the button 103. Optionally, the drill rod 100 is a long drill rod 100 with buttons 103 at both ends, so that a two-end drilling machine can be used to connect to the drill rod 100 at the same time during fishing. During fishing, the forward pushing type drilling machine may be connected to the rear end of the drill rod 100, the pull-back type drilling machine may be connected to the front end of the drill rod 100, or the forward pushing type drilling machine and the pull-back type drilling machine may be connected to both ends of the drill rod 100. The two ends of the drill rod 100 are provided with the buckling type 103, so that the selection of a drilling machine is facilitated, different connection modes can be switched for fishing, and the fishing barrel can be conveniently unlocked when being clamped in a hole.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.