CN213205605U - Joint for changing mud circulation state - Google Patents
Joint for changing mud circulation state Download PDFInfo
- Publication number
- CN213205605U CN213205605U CN202021758123.9U CN202021758123U CN213205605U CN 213205605 U CN213205605 U CN 213205605U CN 202021758123 U CN202021758123 U CN 202021758123U CN 213205605 U CN213205605 U CN 213205605U
- Authority
- CN
- China
- Prior art keywords
- plugging
- inner sleeve
- mud
- joint body
- outer joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000005553 drilling Methods 0.000 abstract description 36
- 238000009434 installation Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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Abstract
A joint for changing the circulation state of slurry comprises an outer joint body and a plugging inner sleeve, wherein the outer joint body is of a cavity structure, an inner sleeve supporting table is arranged in the outer joint body, a middle through hole is formed in the plugging inner sleeve, the plugging inner sleeve is located in the outer joint body, a plugging head is arranged on the lower portion of the plugging inner sleeve, the lower end of the plugging head is attached to the inner sleeve supporting table, an annular air inlet channel of a double-wall drill rod is plugged by the plugging head, and a slurry positive circulation channel is formed in the middle through hole of the plugging inner. Adopt the utility model discloses can only stay drilling tool center through-hole with the annular inlet channel shutoff of double-walled drilling rod by the shutoff endotheca, constitute the used passageway of mud positive circulation drilling, supply mud from the top to circulate, through the installation promptly the joint can be convenient creep into the gas lift reverse circulation and change into mud positive circulation and creep into. In addition, when gas lift reverse circulation creeps into and takes place to block up, the accessible installation the utility model discloses realize the positive circulation of mud, discharge the detritus that the drilling tool central passage blockked up through high-pressure mud.
Description
Technical Field
The utility model relates to a drilling tool connects, especially changes the joint of mud circulation state.
Background
During gas-lift reverse circulation drilling, high-pressure gas passes through the gas box and is sprayed into the inner pipe from the gas-water mixer through the double-wall driving drill rod and the annular gap between the inner pipe and the outer pipe of the double-wall drill rod, countless small bubbles are formed, and the bubbles rise rapidly along the inner pipe and expand simultaneously. Compressed air continuously enters into the slurry, gas-water mixed liquid with low specific gravity is formed at the upper part of the gas-water mixer, liquid in the well has high specific gravity, and the gas-water mixed liquid in the inner pipe flows upwards under the action of pressure difference according to the principle of the communicating vessel, so that a gas lift effect is generated, and rock cores or rock debris at the bottom of the well are continuously taken out of the ground surface and discharged into a sedimentation tank. The settled slurry flows back to the hole and enters the space for supplementing the circulating liquid in the drill rod through the bottom of the hole, and the process of gas lift reverse circulation continuous drilling is formed by continuous circulation. In the drilling process, the channel for gas to flow from top to bottom is an annular gap of the double-wall drilling tool, the gas enters the central channel of the drilling tool from the gas box to the gas-water mixer through the hole on the gas-water mixer after reaching the gas-water mixer, and the gas flow direction is changed from bottom to top. In the construction process of gas lift reverse circulation drilling, sometimes according to the drilling needs, the mud is changed into the positive circulation, the positive and negative circulation drilling needs to be flexibly matched for use, and at the moment, the drilling tool needs to be disassembled. The most difficult dismouting of whole set of drilling tool is gas box, double-walled initiative drilling rod and double-walled drilling rod, and the dismouting process is very consuming time, has the problem that influences the efficiency of creeping into.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's drawback, provide a change mud circulation state's joint, adopt the joint can be convenient, quick creeps into the positive circulation of mud with gas lift reverse circulation.
The problem of the utility model is solved by the following technical scheme:
a joint for changing the circulation state of slurry comprises an outer joint body and a plugging inner sleeve, wherein the outer joint body is of a cavity structure, an inner sleeve supporting table is arranged in the outer joint body, a middle through hole is formed in the plugging inner sleeve, the plugging inner sleeve is located in the outer joint body, a plugging head is arranged on the lower portion of the plugging inner sleeve, the lower end of the plugging head is attached to the inner sleeve supporting table, an annular air inlet channel of a double-wall drill rod is plugged by the plugging head, and a slurry positive circulation channel is formed in the middle through hole of the plugging inner.
The joint for changing the mud circulation state is characterized in that the upper end of the inner plugging sleeve is connected with an inner pipe of a double-wall drill rod through a connecting pipe, the upper part of the inner plugging sleeve and the connecting pipe are sealed by three upper sealing rings, and the sealing head and the outer joint body are sealed by two lower sealing rings.
According to the joint for changing the slurry circulation state, the inner wall of the connecting pipe is provided with the spring limiting table, the spring is arranged between the plugging inner sleeve and the spring limiting table, and two ends of the spring respectively contact and press the spring limiting table and the upper end of the plugging inner sleeve.
The joint for changing the mud circulation state is arranged between the double-wall active drill pipe and the single-wall drill pipe, or replaces the gas-water mixer with the joint and is arranged at the position of the gas-water mixer.
The utility model discloses to solving the problem that the positive and negative circulation of site operation creeps into swiftly to switch and design, connect and include outer joint body and shutoff endotheca, the shutoff endotheca is installed at the outer joint originally internally, and the outer union body is connected with the outer tube of drilling rod, by the annular inlet channel shutoff of shutoff endotheca with the double-walled drilling rod, only stays drilling tool center through-hole, constitutes mud and just circulates the used passageway of drilling, supplies mud from the top to circulate, is promptly through the installation connect can be convenient with gas lift reverse circulation creep into change into mud and just circulate and creep into. In addition, when gas lift reverse circulation creeps into and takes place to block up, mostly be drilling tool center passageway and block up, the accessible installation the utility model discloses realize the positive circulation of mud, discharge the detritus that drilling tool center passageway blockked up through high-pressure mud. Adopt the utility model discloses can be convenient, swift change mud circulation state, be favorable to the site operation to switch positive and negative circulation in a flexible way and creep into the state, improve work efficiency.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of a first installation position of the present invention;
fig. 3 is a schematic view of a second installation position of the present invention.
The reference numbers in the figures are: 1. the device comprises an outer joint body, 1-1 parts, an inner sleeve supporting table, 2 parts, a plugging inner sleeve, 2-1 parts, a plugging head, 3 parts, a connecting pipe, 3-1 parts, a spring limiting table, 4 parts, an outer pipe, 5 parts, an inner pipe, 6 parts, a spring, 7 parts, a lower sealing ring, 8 parts, a lower sealing ring, 9 parts, a double-wall driving drill rod, 10 parts, a single-wall drill rod, 11 parts, a double-wall drill rod and 12 parts, and a joint for changing the mud circulation state.
Detailed Description
Referring to fig. 1, the utility model discloses an outer joint body 1 and shutoff endotheca 2, outer joint body and shutoff endotheca are the cavity structure. An inner sleeve supporting table 1-1 is arranged in the outer joint body, the plugging inner sleeve is positioned in the outer joint body, a plugging head 2-1 is arranged at the lower part of the plugging inner sleeve, the lower end of the plugging head is attached to the inner sleeve supporting table, the annular air inlet channel of the double-wall drill rod is plugged by the plugging head, and a through hole in the middle of the plugging inner sleeve forms a positive slurry circulation channel. The upper end of the plugging inner sleeve is connected with an inner pipe 5 of a double-wall drill rod through a connecting pipe 3, and the lower part of the outer joint body is connected with the drill rod. In order to realize reliable plugging of the annular air inlet channel, three upper sealing rings 7 are used for sealing between the upper part of the plugging inner sleeve and the connecting pipe; the sealing head and the outer joint body are sealed by two lower sealing rings 8. The arrangement of the two sealing rings can ensure that slurry does not leak outwards under the passage of the plugging inner sleeve. In order to axially limit the plugging inner sleeve, a spring limiting table 3-1 is arranged on the inner wall of the connecting pipe, a spring 6 is arranged between the plugging inner sleeve and the spring limiting table, and two ends of the spring respectively contact and press the spring limiting table and the upper end of the plugging inner sleeve.
The utility model discloses there are two kinds of mounted positions, and the first installation method is shown in fig. 2, will the utility model discloses change the joint 12 of mud circulation state and install under double-walled initiative drilling rod 9, the lower termination single-walled drilling rod 10 of joint. The installation mode only reserves the central through hole of the whole set of drilling tool, and the gas box and the double-wall active drilling rod are used as a common active drilling rod to form a channel for the positive circulation drilling of the slurry, so that the slurry can circulate from top to bottom. Namely, the gas lift reverse circulation drilling can be converted into the mud forward circulation drilling. Owing to adopted the utility model discloses, can save the time of dismouting gas box and initiative drilling rod, especially can increase substantially work efficiency when the job site lacks special assembly and disassembly tools. The second installation method is as shown in fig. 3, when the number of single-wall drill rods is not enough to maintain the drilling operation on the construction site, the joint 12 for changing the mud circulation state of the utility model can be installed at the position of the original gas-water mixer, the gas-water mixer is replaced, the upper end of the joint is connected with the double-wall drill rod 11, and the lower end is connected with the single-wall drill rod 10, so that the original double-wall drilling tool can be used as a single-wall drilling tool, and the time for disassembling the double-wall drilling tool is saved.
Claims (4)
1. A joint for changing the circulation state of slurry is characterized in that: the double-wall drill pipe comprises an outer joint body (1) and a plugging inner sleeve (2), wherein the outer joint body is of a cavity structure, an inner sleeve supporting table (1-1) is arranged in the outer joint body, a middle through hole is formed in the plugging inner sleeve, the plugging inner sleeve is located in the outer joint body, a plugging head (2-1) is arranged on the lower portion of the plugging inner sleeve, the lower end of the plugging head is attached to the inner sleeve supporting table, the plugging head plugs an annular air inlet channel of a double-wall drill pipe, and the middle through hole of the plugging inner sleeve is.
2. The joint for changing a mud circulation state according to claim 1, wherein: the upper end of the inner plugging sleeve is connected with an inner pipe (5) of the double-wall drill rod through a connecting pipe (3), the upper part of the inner plugging sleeve and the connecting pipe are sealed by three upper sealing rings (7), and the sealing head and the outer joint body are sealed by two lower sealing rings (8).
3. The joint for changing a mud circulation state according to claim 2, wherein: a spring limiting table (3-1) is arranged on the inner wall of the connecting pipe, a spring (6) is arranged between the plugging inner sleeve and the spring limiting table, and two ends of the spring respectively contact and press the spring limiting table and the upper end of the plugging inner sleeve.
4. A joint for changing mud circulation conditions according to claim 3, wherein: the joint is arranged between the double-wall active drill rod and the single-wall drill rod, or replaces the gas-water mixer with the joint and is arranged at the position of the gas-water mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021758123.9U CN213205605U (en) | 2020-08-21 | 2020-08-21 | Joint for changing mud circulation state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021758123.9U CN213205605U (en) | 2020-08-21 | 2020-08-21 | Joint for changing mud circulation state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213205605U true CN213205605U (en) | 2021-05-14 |
Family
ID=75840236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021758123.9U Expired - Fee Related CN213205605U (en) | 2020-08-21 | 2020-08-21 | Joint for changing mud circulation state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213205605U (en) |
-
2020
- 2020-08-21 CN CN202021758123.9U patent/CN213205605U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210514 |