CN113107390A - Drill rod centralizing ring and drilling device for horizontal drilling - Google Patents
Drill rod centralizing ring and drilling device for horizontal drilling Download PDFInfo
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- CN113107390A CN113107390A CN202110437006.5A CN202110437006A CN113107390A CN 113107390 A CN113107390 A CN 113107390A CN 202110437006 A CN202110437006 A CN 202110437006A CN 113107390 A CN113107390 A CN 113107390A
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- drilling
- inner ring
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- 238000005553 drilling Methods 0.000 title claims abstract description 78
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 239000002002 slurry Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 11
- 239000002689 soil Substances 0.000 abstract description 8
- 239000011435 rock Substances 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/002—Down-hole drilling fluid separation systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a drill rod centralizing ring and a drilling device for horizontal drilling, wherein the centralizing ring comprises an inner ring and an outer ring which are concentrically arranged, the sections of the inner ring and the outer ring are circular, and the inner ring is used for being sleeved and fixed on a drill rod; the inner ring with the interval sets up two at least connection pedestals between the outer ring, connect pedestal one end with the outer wall connection of inner ring, the other end with the inner wall connection of outer loop. In the drilling process, the drill rod is lifted to the centered position to avoid being tightly attached to the wall of a drill hole, the loss of the drilling pressure in rock soil is reduced, meanwhile, a channel is formed in a space gap area between the outer ring and the inner ring, the circulation effect of slurry in the hole is good, and the drilling device can be used for surveying the directional horizontal drilling operation with small diameter and long distance and has better popularization significance.
Description
Technical Field
The invention relates to the technical field of drill rod centralizing rings, in particular to a drill rod centralizing ring and a drilling device for horizontal drilling.
Background
The traditional vertical drilling technology is influenced by the problems of high altitude, complex geological conditions, difficult transportation of a drilling machine or high drilling difficulty and the like, regional survey cannot be accurately completed, and the surveying effect is not ideal. The horizontal drilling exploration technology has obvious application advantages in the complex high-altitude areas, and has attracted extensive attention to direct drilling exploration by adopting horizontal orientation at two ends of the mountain foot tunnel.
In the horizontal directional drilling process, the diameter of a drill rod is smaller than that of a drill bit, a certain annular space exists between the drill rod and a drill hole, the annular space is mainly used for a circulating channel of drilling fluid, the drill rod cannot be centered due to the influence of gravity, the drill rod is tightly attached to the lower hole wall, the drilling pressure transmitted to the drill bit by the drilling machine is serious in rock-soil loss, and the circulating effect of mud in the hole is poor.
Therefore, it is necessary to provide a centralizing ring to overcome the influence of gravity on the drill rod to assist horizontal exploration construction.
Disclosure of Invention
The invention aims to: aiming at the problems that in the horizontal directional drilling process in the prior art, a drill rod cannot be placed in the middle to cling to a lower hole wall, so that the drilling pressure transmitted to a drill bit by a drilling machine is seriously lost in rock and soil, and the circulation effect of slurry in the hole is not good, the drill rod centralizing ring for horizontal drilling is provided, the influence of gravity on the drill rod can be overcome by the drill rod centralizing ring, the drill rod is placed in the middle to be prevented from being attached to the drill hole wall, the loss of the drilling pressure in the rock and soil is reduced, and the circulation effect of the slurry in the hole is good.
In order to achieve the purpose, the invention adopts the technical scheme that:
a drill rod centralizing ring comprises an inner ring and an outer ring which are concentrically arranged, wherein the sections of the inner ring and the outer ring are circular, and the inner ring is used for being sleeved and fixed on a drill rod;
the inner ring with the interval sets up two at least connection pedestals between the outer ring, connect pedestal one end with the outer wall connection of inner ring, the other end with the inner wall connection of outer loop.
The centralizing ring provided by the invention mainly comprises an inner ring and an outer ring which are concentrically arranged, the inner ring and the outer ring are connected through a connecting pedestal, when the centralizing ring is used, the inner ring is sleeved and fixed on a drill rod, and the outer ring can form a supporting piece of the drill rod when drilling. In the drilling process, the drill rod is arranged in the inner ring and can be lifted to the central position to avoid being tightly attached to the wall of a drill hole, so that the loss of the drilling pressure in rock soil is reduced, and meanwhile, a channel is formed in a space gap area between the outer ring and the inner ring, so that the circulation effect of slurry in the hole is good.
Furthermore, the connection pedestal is a connection structure such as a bearing seat and the like which can play a role in connecting the inner ring and the outer ring.
Further, all the connecting pedestals are uniformly distributed at intervals between the inner ring and the outer ring. The connection pedestal that even interval set up can further guarantee, and the horizontal drilling in-process, the stability of ring and drilling rod is right.
Furthermore, a plurality of pin key grooves are formed in the outer wall of the inner ring, and the inner ring is fixed with the drill rod through the pin keys. The centralizing ring is directly and firmly fixed with the drill rod through the pin key, so that the centralizing ring is prevented from slipping due to the rotation of the drill rod during working, and the centralizing ring is ensured to rotate along with the drill rod. Meanwhile, the righting ring can be prevented from being damaged by the pin key fixation.
Furthermore, a movable steel ball is embedded in the outer wall of the outer ring. In the drilling process, the movable steel ball rolls along the circumferential direction of the drill rod while rolling along the axial direction of the drill hole and rotates at a high speed in the drill hole along with the drill rod, so that the sliding friction force between the drill rod and the hole wall is changed into the rolling friction force between the centralizing ring and the drill hole wall when the drill bit is advanced, the loss of the drilling pressure of the drill bit in the hole is further reduced, and the difficulty of drilling the drill hole is reduced.
Furthermore, the connection pedestal is provided with a cavity, one part of the movable steel ball is arranged in the cavity, and the other part of the movable steel ball is leaked on the outer wall of the outer ring. Because the diameter of the movable steel ball is larger than the wall thickness of the outer ring, the movable steel ball is convenient to mount by arranging the cavity on the connecting pedestal.
Furthermore, each connecting pedestal is provided with a movable steel ball.
Further, the inner ring with the interval is provided with 3 ~ 5 between the outer ring and connects the pedestal. 3-5 connect the pedestal not only can make whole righting ring have stable structure, can also make the circulation effect of drilling mud better, 3-5 steel balls of connecting the pedestal simultaneously play the better effect to improving frictional force. Too few connecting pedestals and movable steel balls not only can cause the deflection of the centering ring in operation, but also have little influence on improving the friction force; at the same time, too many connection blocks may result in poor circulation of drilling mud.
Furthermore, the cavity of the connecting pedestal is communicated along the circumferential direction of the outer ring. The cavity is communicated with a space area between the inner ring and the outer ring, and the arrangement of the through hole can lead the circulating slurry to lubricate the movable steel ball to a certain degree.
Furthermore, the cavity is provided with a slurry filter screen, and the slurry filter screen is arranged at two ends of the cavity communicated with each other along the circumferential direction of the outer ring. The water filtered by the mud filter screen has certain impact force on the movable steel ball, and has good washing and lubricating effects on the movable steel ball.
Furthermore, the drill rod centralizing ring is divided into a first centralizing body and a second centralizing body, the first centralizing body is detachably connected with the second centralizing body, and the connecting surface of the first centralizing body and the second centralizing body penetrates through the cavity. The first centralizing body and the second centralizing body are of symmetrical structures, and the drill rod centralizing ring is convenient to manufacture and install by arranging the first centralizing body and the second centralizing body.
Furthermore, the connecting surface of the first centralizing body and the second centralizing body is the cross section of the drill rod centralizing ring, and the drill rod centralizing ring is transversely divided into the first centralizing body and the second centralizing body.
Further, the first centralizing body and the second centralizing body are symmetrically arranged.
Further, the first centralizing body is connected with the second centralizing body through a screw.
Furthermore, the first centralizing body and the second centralizing body are provided with screw holes matched with screws.
Another object of the present invention is to provide a drilling device using the above centralizing ring.
A drilling device for horizontal drilling comprises a drill bit, a drill rod and the drill rod centralizing ring sleeved and fixed on the drill rod, wherein the drill bit is installed at one end of the drill rod.
In the drilling process, the drill rod is lifted to the centered position to avoid being tightly attached to the wall of a drill hole, the loss of the drilling pressure in rock soil is reduced, meanwhile, a channel is formed in a space gap area between the outer ring and the inner ring, the circulation effect of slurry in the hole is good, and the drilling device can be used for surveying the directional horizontal drilling operation with small diameter and long distance and has better popularization significance.
Furthermore, the number of the drill rod centralizing rings is 1-2.
Further, when the number of the drill rod centralizing rings is 2, two adjacent drill rod centralizing rings are arranged at intervals along the axial direction of the drill rod.
Another object of the present invention is to provide a method for installing the above drilling device.
A method of installing a drilling apparatus comprising the steps of:
step S1, installing a drill rod centralizing ring, and then enabling a drill rod to pass through an inner ring of the drill rod centralizing ring;
step S2, fixedly connecting the centralizing ring with the drill rod;
and step S3, installing a drill bit at one end of the drill rod to complete the installation of the drilling device.
The installation method of the drilling device provided by the invention is simple to operate and convenient to disassemble, and the drilling rod centralizing ring is not influenced in quality after being disassembled and is convenient to recycle.
Further, in step S2, a pin key is inserted into the pin key groove of the inner ring to fixedly connect the centralizing ring and the drill rod. The mode that adopts the cotter key is fixed, easy operation, convenient to detach can not produce the quality influence to the ring is right to the drilling rod after dismantling, the cyclic utilization of being convenient for.
Further, in step S2, after the pin key is inserted into the pin key groove of the inner ring, both ends of the pin key groove are exposed. Furthermore, a threaded hole is formed in the pin key at the end face positions of two ends of the pin key groove, and then a screw is inserted into the threaded hole for further fixing the pin key, so that the phenomenon that the pin falls off to cause the centralizer to fall off in the drilling process is avoided.
Further, in step S1, the drill rod stabilizing ring is specifically installed by the following steps:
the movable steel balls are firstly arranged in a cavity of a connecting pedestal of the second centralizing body, then the first centralizing body is arranged on the second centralizing body, the first centralizing body and the second centralizing body are fixed by screws, and then slurry filter screens are arranged at two ends of the cavity which are communicated along the circumferential direction of the outer ring, so that the installation of the drill rod centralizing ring is completed.
Further, the cavity is a cavity on a connecting pedestal of the drill rod centralizing ring.
Further, the first centralizing body and the second centralizing body are symmetrically arranged.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the centralizing ring provided by the invention mainly comprises an inner ring and an outer ring which are concentrically arranged, the inner ring and the outer ring are connected through a connecting pedestal, when the centralizing ring is used, the inner ring is sleeved and fixed on a drill rod, and the outer ring can form a support member of the drill rod in a drilling hole. In the drilling process, the drill rod is arranged in the inner ring and can be lifted to the central position to avoid being tightly attached to the wall of a drill hole, so that the loss of the drilling pressure in rock soil is reduced, and meanwhile, a channel is formed in a space gap area between the outer ring and the inner ring, so that the circulation effect of slurry in the hole is good.
2. The movable steel balls are arranged on the outer wall of the centralizing ring, so that sliding friction force between a drill rod and a hole wall can be changed into rolling friction force between the centralizing ring and a drill hole wall during footage, the loss of the drilling pressure of a drill bit in the hole is further reduced, and the difficulty of footage of the drill hole is reduced.
3. The drilling device provided by the invention can be used for exploring the directional horizontal drilling operation with small caliber and long distance, and has better popularization significance.
4. The installation method of the drilling device provided by the invention is simple to operate and convenient to disassemble, and the drilling rod centralizing ring is not influenced in quality after being disassembled and is convenient to recycle.
Drawings
Fig. 1 is a schematic structural view of a drill pipe centralizing ring provided by the invention.
Figure 2 is a transverse cross-sectional view of the pipe centralizing ring of figure 1.
Fig. 3 is a longitudinal sectional view of the connection pedestal.
Fig. 4 is a schematic view of the structural relationship of the drill pipe and the drill pipe centralizing ring.
Icon: 1-a drill pipe centralizing ring; 11-inner ring; 111-connection stand; 1111-a cavity; 1112-mud filter screen; 112-pin keyway; 113-pin key; 12-an outer ring; 121-a mud circulation channel; 122-movable steel ball; 13-a screw; 14-a first centralizing body; 15-a second centralizing body; 2-drilling rod.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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.
Example 1
As shown in fig. 1 and 2, a drill rod centralizing ring 1 includes an inner ring 11 and an outer ring 12 which are concentrically arranged, the sections of the inner ring 11 and the outer ring 12 are circular, three connecting pedestals 111 are connected between the inner ring 11 and the outer ring 12, and the connecting pedestals 111 are uniformly arranged along the circumferential direction of the inner ring 11 at intervals. The empty gap area formed between the inner ring 11 and the outer ring 12 is a mud circulation channel 121. As shown in fig. 1, the drill rod centralizing ring 1 includes a first centralizing body 14 and a second centralizing body 15 which are symmetrically arranged, the first centralizing body 14 and the second centralizing body 15 are two symmetrical circular rings, and are fixed by a screw 13 after combination to form the drill rod centralizing ring 1, a matching connection surface of the first centralizing body 14 and the second centralizing body 15 is a cross section of the drill rod centralizing ring 1, and the matching connection surface of the first centralizing body 14 and the second centralizing body 15 passes through the cavity 1111.
The outer wall of the inner ring 11 is provided with three pin key slots 112, the inner ring 11 is used for being sleeved and fixed on the drill rod 2, and the inner ring 11 is fixed with the drill rod 2 through a pin key 113.
Meanwhile, three movable steel balls 122 are embedded in the outer wall of the outer ring 12, the connecting pedestal 111 is provided with a cavity 1111, one part of the movable steel balls 122 is arranged in the cavity 1111, and the other part of the movable steel balls is exposed out of the outer wall of the outer ring 12. In the drilling process, the movable steel ball 122 rolls along the circumferential direction of the drill rod 2 while rolling along the axial direction of the drill hole, and rotates at a high speed in the drill hole along with the drill rod 2, so that the sliding friction force between the drill rod and the hole wall is changed into the rolling friction force between the centralizing ring and the drill hole wall during the drilling, the loss of the drilling pressure of the drill bit in the hole is further reduced, and the drilling difficulty is reduced.
Preferably, four or five connecting pedestals 111 are arranged between the inner ring 11 and the outer ring 12 at intervals; each connecting pedestal 111 is provided with a movable steel ball 122.
As shown in fig. 3, the cavity 1111 of the connection base 111 penetrates in the circumferential direction of the outer ring 12, and a slurry filter 1112 is provided at both ends of the penetrating hole. The water filtered by the mud filter screen has certain impact force on the movable steel ball, and has good washing and lubricating effects on the movable steel ball.
When the drilling tool is used, the inner ring 11 is sleeved and fixed on the drill rod 2, the outer ring 12 can form a support piece of the drill rod in a drilling process, the centralizing ring is fastened on the drill rod, the drill rod 2 is lifted to the centered position in the drilling process, the centralizing ring is prevented from being tightly attached to the wall of the drill hole, the loss of drilling pressure in rock soil is reduced, and meanwhile, a channel is formed in a space gap area between the outer ring 12 and the inner ring 11, so that the circulation effect of slurry in the hole is good.
Example 2
A drilling device for horizontal drilling comprises a drill bit, a drill rod 2 and two drill rod centralizing rings 1 which are arranged at intervals and are sleeved and fixed on the drill rod 2, wherein the drill bit is arranged at one end of the drill rod 2. As shown in the schematic structural relationship diagram of the drill rod 2 and the drill rod centralizing ring 1 in fig. 4, the drill rod centralizing ring 1 is sleeved on the drill rod 2 and is fixedly connected through the pin key 113.
Example 3
The present embodiment provides the installation steps of the drilling device of embodiment 2, including the steps of:
step A, installing a drill rod centralizing ring 1: firstly, sequentially placing three movable steel balls 122 in a cavity of a connecting pedestal 111 of a second righting body 15, then symmetrically placing a first righting body 14 on the second righting body 15, fixing the first righting body 14 and the second righting body 15 by using screws, and then installing a slurry filter screen 1112 at two ends of a cavity 1111, which are communicated with each other along the circumferential direction of the outer ring;
step B, then a drill rod 2 passes through the inner ring 11 of the drill rod centralizing ring 1; inserting a pin key 113 into a pin key groove 112 of the inner ring 11, wherein the pin key 113 is exposed from both ends of the pin key groove 112, inserting a screw into a threaded hole formed in the outer exposed pin key at the end face position of both ends of the pin key groove 112, and fixedly connecting the drill rod centralizing ring 1 with the drill rod 2;
and step C, installing a drill bit at one end of the drill rod 2 to finish the installation of the drilling device.
The installation method of the drilling device provided by the invention is simple to operate and convenient to disassemble, and the drilling rod centralizing ring is not influenced in quality after being disassembled and is convenient to recycle.
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.
Claims (10)
1. A drill rod centralizing ring (1) is characterized by comprising an inner ring (11) and an outer ring (12) which are concentrically arranged, wherein the sections of the inner ring (11) and the outer ring (12) are circular rings, and the inner ring (11) is used for being sleeved and fixed on a drill rod (2);
the inner ring (11) with interval sets up two at least connection pedestal (111) between outer ring (12), connect pedestal (111) one end with the outer wall of inner ring (11) is connected, the other end with the inner wall of outer ring (12) is connected.
2. The rod centralizing ring (1) according to claim 1, characterized in that all the connection abutments (111) are evenly spaced between the inner ring (11) and the outer ring (12); the inner ring (11) and the outer ring (12) are provided with 3-5 connecting pedestals (111) at intervals.
3. The rod centralizing ring (1) according to claim 1, characterized in that the outer wall of the inner ring (11) is provided with a number of pin keyways (112), the inner ring (11) being fixed with the rod (2) by means of pin keys (113).
4. The rod centralizing ring (1) according to any one of claims 1-3, characterized in that a movable steel ball (122) is embedded on the outer wall of the outer ring (12).
5. The rod centralizing ring (1) according to claim 4, characterized in that the connection bench (111) is provided with a cavity (1111), a part of the movable steel ball (122) is arranged in the cavity (1111) and another part leaks out on the outer wall of the outer ring (12).
6. Drill rod centralizing ring (1) according to claim 5, characterized in that the cavity (1111) is through-going in circumferential direction of the outer ring (12).
7. The rod centralizing ring (1) according to claim 6, characterized in that the cavity (1111) is provided with mud filter screens (1112), the mud filter screens (1112) being arranged at both ends of the cavity (1111) running through in the circumferential direction of the outer ring (12).
8. The rod centralizing ring (1) according to claim 5, characterized in that the rod centralizing ring (1) is divided into a first centralizing body (14) and a second centralizing body (15), the first centralizing body (14) and the second centralizing body (15) are detachably connected, and the connection surface of the first centralizing body (14) and the second centralizing body (15) passes through the cavity (1111).
9. A drilling device for horizontal drilling, comprising a drill bit, a drill rod (2) and a rod centralizing ring (1) according to any one of claims 1-8, which is fitted on the drill rod (2), the drill bit being mounted at one end of the drill rod (2).
10. A method of installing a drilling apparatus for horizontal drilling according to claim 9, comprising the steps of: s1, installing the drill rod centralizing ring (1), and then enabling a drill rod (2) to penetrate through an inner ring (11) of the drill rod centralizing ring (1);
step S2, fixedly connecting the drill rod centralizing ring (1) with the drill rod (2);
and step S3, mounting a drill bit at one end of the drill rod (2) to complete the mounting of the drilling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110437006.5A CN113107390A (en) | 2021-04-22 | 2021-04-22 | Drill rod centralizing ring and drilling device for horizontal drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110437006.5A CN113107390A (en) | 2021-04-22 | 2021-04-22 | Drill rod centralizing ring and drilling device for horizontal drilling |
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| Publication Number | Publication Date |
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| CN113107390A true CN113107390A (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110437006.5A Pending CN113107390A (en) | 2021-04-22 | 2021-04-22 | Drill rod centralizing ring and drilling device for horizontal drilling |
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Application publication date: 20210713 |