CN213838547U - Flexible drill collar - Google Patents
Flexible drill collar Download PDFInfo
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- CN213838547U CN213838547U CN202023021965.9U CN202023021965U CN213838547U CN 213838547 U CN213838547 U CN 213838547U CN 202023021965 U CN202023021965 U CN 202023021965U CN 213838547 U CN213838547 U CN 213838547U
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- drill collar
- flexible
- collar body
- drill
- nut
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Abstract
The utility model provides a flexible drill collar. Relates to the technical field of oil field drilling. The drill collar body is provided with a liner tube sleeved outside the drill collar body, the upper part of the liner tube is connected with the drill collar body through a bearing, the lower part of the liner tube is connected with a nut through a bearing, the nut is in threaded connection with the drill collar body, the nut and the drill collar body are fixed through a pin, and the outside of the liner tube is vulcanized with a flexible sleeve. The utility model discloses following beneficial effect has: the flexible casing rotates through friction with a well wall in a well, so that the drill is not easy to block, the sticking and sticking accidents are prevented, the contact area between the flexible casing and the well wall is reduced due to the arrangement of the concave arc on the flexible casing, the sticking and sticking prevention effect is achieved, the drilling quality of the device is improved, the spiral grooves of the drill bits matched with the spiral direction of the convex arc are consistent in direction, the rock cutting guide is favorably and upwards lifted, the elastic flexible drill collar plays a role in absorbing the stratum stress and protecting the drill collar from the stratum stress impact, and the service life of the drill collar is prolonged.
Description
The technical field is as follows:
the utility model belongs to the technical field of the oil field drilling technique and specifically relates to flexible drill collar.
Background art:
the drill collar is an important underground drilling tool in exploration and development of petroleum, natural gas and coal bed gas, is an important component of a drill string system, and is connected to the lower part of the whole drill string. The main function of the device is to apply drilling pressure to the drill bit and transmit torque, thereby ensuring the smooth operation of the drilling process. The drill collar for petroleum drilling in the prior art bears the combined action of various loads such as tension, compression, bending and torsion, the drill collar for petroleum drilling in the prior art is often stuck to cause sticking and clamping accidents in the drilling process, and the service life of the drill collar is influenced.
The utility model has the following contents:
in order to solve the above problems, the present invention provides a flexible drill collar.
The technical scheme of the utility model is that: the flexible drill collar comprises a drill collar body, wherein an upper joint and a lower joint are arranged on the drill collar body, a liner tube is arranged on the drill collar body and sleeved outside the drill collar body, the upper part of the liner tube is connected with the drill collar body through a bearing, the lower part of the liner tube is connected with a nut through a bearing, the nut is in threaded connection with the drill collar body, the nut and the drill collar body are fixed through a pin, and a flexible sleeve is vulcanized outside the liner tube.
The flexible sleeve is provided with a spiral convex circular arc and a concave circular arc between the two convex circular arcs which are uniformly distributed on the circumference, and the spiral directions of the convex circular arc and the concave circular arc are consistent with the direction of the spiral groove of the drill.
The flexible sleeve is a rubber product, and a layer of wear-resistant coating is laid on the surface of the flexible sleeve.
The slip groove is formed in the upper side of the drill collar body, the hanging clamp groove is formed in the upper side of the drill collar body, and the hanging clamp groove is located above the slip groove.
The utility model discloses following beneficial effect has: the flexible casing rotates through friction with a well wall in a well, so that the drill is not easy to block, the sticking and sticking accidents are prevented, the contact area between the flexible casing and the well wall is reduced due to the arrangement of the concave arc on the flexible casing, the sticking and sticking prevention effect is achieved, the drilling quality of the device is improved, the spiral grooves of the drill bits matched with the spiral direction of the convex arc are consistent in direction, the rock cutting guide is favorably and upwards lifted, the elastic flexible drill collar plays a role in absorbing the stratum stress and protecting the drill collar from the stratum stress impact, and the service life of the drill collar is prolonged.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic structural diagram of the middle flexible sleeve of the present invention.
In the figure, 1-a drill collar body, 2-a lower joint, 3-an upper joint, 4-a hanging clamping groove, 5-a slip groove, 6-a bearing, 7-a liner pipe, 8-a flexible casing, 9-a nut, 10-a pin, 11-a convex arc and 12-a concave arc.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
the flexible drill collar is characterized by being formed by combining a figure 1 and figures 2-3 and comprising a drill collar body 1, wherein an upper joint 3 and a lower joint 2 are arranged on the drill collar body 1 and butt-jointed with a drill rod and a drill bit, a liner tube 7 is arranged on the drill collar body 1 and sleeved outside the drill collar body 1, the upper part of the liner tube 7 is connected with the drill collar body 1 through a bearing 6, the lower part of the liner tube 7 is connected with a nut 9 through the bearing 6, the nut 9 is in threaded connection with the drill collar body 1, the nut 9 and the drill collar body 1 are fixed through a pin 10, a flexible sleeve 8 is vulcanized outside the liner tube 7, the liner tube 7 serves as a framework of the flexible sleeve 8 and is connected onto the drill collar body 1 through the bearing 6, the flexible sleeve 8 and the liner tube 7 can rotate outside the drill collar body 1, the flexible sleeve 8 rotates with a well wall through friction in a downhole and is not prone to drill jamming, the occurrence of sticking and jamming accidents is prevented, and the working efficiency of drilling is improved.
The spiral groove direction of the drill bit matched with the spiral direction of the convex circular arc 11 and the spiral direction of the concave circular arc 12 is consistent, and rock cutting guiding is favorably and upwards promoted.
The flexible sleeve 8 is made of rubber, a layer of wear-resistant coating is laid on the surface of the flexible sleeve 8 to prolong the service life of the flexible sleeve 8, when stratum stress fluctuates and stratum deformation occurs, and a drilled well hole changes, stratum rock impacts the elastic flexible sleeve 8 without directly impacting the drill collar, and the elastic flexible sleeve 8 plays a role in absorbing the stratum stress and protecting the drill collar from the impact of the stratum stress.
The slip groove 5 is formed in the upper side of the drill collar body 1, the hanging clamp groove 4 is formed in the upper side of the drill collar body 1, and the hanging clamp groove 4 is located above the slip groove 5.
Through the setting of slip groove 5, when playing this device down, utilize and set up definite slip groove 5 on every this device drill collar body 1 to use special fixture, block the slip groove 5 and make this device stop, be convenient for this device split after using.
The outer side of the drill collar body 1 is provided with a hanging clamp groove 4, the hanging clamp groove 4 is positioned above a slip groove 5, and the hanging clamp groove 4 on the drill collar is clamped by the hanging clamp through the arrangement of the hanging clamp groove 4 to be hung or moved to a preset position, so that the device can be conveniently installed and detached before and after use.
Claims (4)
1. A flexible drill collar comprises a drill collar body (1), and is characterized in that: be equipped with top connection (3) and lower clutch (2) on drill collar body (1), be equipped with bushing pipe (7) on drill collar body (1) and overlap in the drill collar body (1) outside, bushing pipe (7) upper portion is passed through bearing (6) and is connected drill collar body (1), bearing (6) coupling nut (9) are passed through to bushing pipe (7) lower part, nut (9) and drill collar body (1) threaded connection, nut (9) and drill collar body (1) are fixed through pin (10), bushing pipe (7) outside vulcanization has a flexible casing (8).
2. The flexible drill collar of claim 1, wherein: the flexible sleeve (8) is provided with spiral convex circular arcs (11) which are uniformly distributed on the circumference and are in a spiral shape and concave circular arcs (12) between the two convex circular arcs (11), and the spiral directions of the convex circular arcs (11) and the concave circular arcs (12) are consistent with the spiral groove direction of the drill.
3. The flexible drill collar of claim 1, wherein: the flexible sleeve (8) is a rubber product, and a layer of wear-resistant coating is laid on the surface of the flexible sleeve (8).
4. The flexible drill collar of claim 1, wherein: the upper side of the drill collar body (1) is provided with a slip groove (5), the upper side of the drill collar body (1) is provided with a hanging clamp groove (4), and the hanging clamp groove (4) is positioned above the slip groove (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023021965.9U CN213838547U (en) | 2020-12-15 | 2020-12-15 | Flexible drill collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023021965.9U CN213838547U (en) | 2020-12-15 | 2020-12-15 | Flexible drill collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213838547U true CN213838547U (en) | 2021-07-30 |
Family
ID=76998447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023021965.9U Active CN213838547U (en) | 2020-12-15 | 2020-12-15 | Flexible drill collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213838547U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117823035A (en) * | 2023-12-25 | 2024-04-05 | 中国石油天然气集团有限公司 | Top drive drilling device and drill rod thereof |
| WO2024217120A1 (en) * | 2023-04-19 | 2024-10-24 | 中海油田服务股份有限公司 | Rotary steerable backup arm and rotary steerable drilling system |
-
2020
- 2020-12-15 CN CN202023021965.9U patent/CN213838547U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024217120A1 (en) * | 2023-04-19 | 2024-10-24 | 中海油田服务股份有限公司 | Rotary steerable backup arm and rotary steerable drilling system |
| CN117823035A (en) * | 2023-12-25 | 2024-04-05 | 中国石油天然气集团有限公司 | Top drive drilling device and drill rod thereof |
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