CN204899776U - Dropping assembly - Google Patents
Dropping assembly Download PDFInfo
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- CN204899776U CN204899776U CN201520644310.7U CN201520644310U CN204899776U CN 204899776 U CN204899776 U CN 204899776U CN 201520644310 U CN201520644310 U CN 201520644310U CN 204899776 U CN204899776 U CN 204899776U
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- drill collar
- drill
- screw rod
- stabilizer
- collar
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Abstract
The utility model discloses a dropping assembly, including drill bit, single curved screw rod, first drill collar, second drill collar and stabilizer, wherein the one end of singly curved screw rod is direct is connected with the drill bit, and first drill collar and single trailing end connection who bends the screw rod are equipped with the second drill collar between first drill collar and stabilizer. The stabilizer is not installed at the position that single curved screw rod body is close to the drill bit. The screw rod bent angle of single curved screw rod is 0.75. First drill collar is the non magnetic drill collar. The length of second drill collar is 3m. Beneficial effect: can satisfy the well drilling requirement of arbitrary block well drilling, entangle oblique effect and showing, entangle the slope and reach 0.7/100m.
Description
Technical field
The utility model relates to a kind of drilling assembly, particularly a kind of dropping assembly.
Background technology
At present, drilling well is the basic means of the subterranean resource exploration and developments such as petroleum gas, and straight well deviation control with drilling straight well is one of technical barrier of often encountering of situ of drilling well.When beating straight well, if hole deviation is excessive, well can be made to depart from subterranean designation target, upset the layout of oil-gas field development.In inclined shaft, drill string easily leans against borehole wall side, during rotation, serious friction occurs, and easily makes drill string wear and fractures, also may cause the accident such as cave-in and key-seating sticking.Hole deviation exceeds standard also can affect cementing quality, and hole deviation crosses conference directly affects the separate zone production of down-hole, normally the carrying out of water filling work, and also often causes the wearing and tearing of oil pipe and sucker rod and fracture to pumpingh well.So hole deviation exceeds standard and has very large harm to the exploration and development of oil gas field.
The dropping assembly used in drilling engineering now, modal have pendulum assembly, four-in-one drilling tool and offset-axes bottom-hole assembly.Pendulum assembly is made up of drill bit, two drill collars and stabilizer, four-in-one drilling tool by drill bit, single bend PDM (installation stabilizer), stub boring quickly, stabilizer forms, offset-axes bottom-hole assembly is made up of drill bit, some drill collars, eccentric shaft connection, the defect of these three kinds of dropping assemblies is that drop angle rate is little, and the pressure of the drill can not be too high, the requirement of drop angle can not be met when some block drilling well.
Summary of the invention
The purpose of this utility model can not meet the problem of drop angle requirement and a kind of dropping assembly provided to solve existing drilling assembly.
The dropping assembly that the utility model provides includes drill bit, single bend PDM, the first drill collar, the second drill collar and stabilizer, wherein one end of single bend PDM is directly connected with drill bit, first drill collar is connected with the tail end of single bend PDM, is provided with the second drill collar between the first drill collar and stabilizer.
Single bend PDM body does not install stabilizer near the position of drill bit.
The screw rod bent angle of single bend PDM is 0.75 °.
First drill collar is non magnetic drill collar.
The length of the second drill collar is 3m.
Operating principle of the present utility model:
Bit side force along with elbow point orientation be change according to similar simple harmonic quantity rule, bit side force is all negative in the consecutive variations process of a week, namely bit side force is drop angle power always, and drop angle power is larger, when 180 ° of elbow point orientation, drilling tool drop angle power reaches maximum, thus improves the drop angle effect of drilling assembly.
The beneficial effects of the utility model:
Can meet the drilling well requirement of any block drilling well, well straightening Be very effective, well straightening rate reaches 0.7 °/100m.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
1, drill bit 2, single bend PDM 3, first drill collar 4, second drill collar 5, stabilizer.
Detailed description of the invention
Refer to shown in Fig. 1:
The dropping assembly that the utility model provides includes drill bit 1, single bend PDM 2, first drill collar 3, second drill collar 4 and stabilizer 5, wherein one end of single bend PDM 2 is directly connected with drill bit 1, first drill collar 3 is connected with the tail end of single bend PDM 2, is provided with the second drill collar 4 between the first drill collar 3 and stabilizer 5.
Single bend PDM 2 body does not install stabilizer 5 near the position of drill bit 1.
The screw rod bent angle of single bend PDM 2 is 0.75 °.
First drill collar 3 is non magnetic drill collar.
The length of the second drill collar 4 is 3m.
Operating principle of the present utility model:
Drill bit 1 lateral force along with elbow point orientation be change according to similar simple harmonic quantity rule, drill bit 1 lateral force is all negative in the consecutive variations process of a week, namely drill bit 1 lateral force is drop angle power always, and drop angle power is larger, when 180 ° of elbow point orientation, drilling tool drop angle power reaches maximum, thus improves the drop angle effect of drilling assembly.
Claims (4)
1. a dropping assembly, it is characterized in that: include drill bit, single bend PDM, the first drill collar, the second drill collar and stabilizer, wherein one end of single bend PDM is directly connected with drill bit, and the first drill collar is connected with the tail end of single bend PDM, is provided with the second drill collar between the first drill collar and stabilizer.
2. a kind of dropping assembly according to claim 1, is characterized in that: the screw rod bent angle of described single bend PDM is 0.75 °.
3. a kind of dropping assembly according to claim 1, is characterized in that: the first described drill collar is non magnetic drill collar.
4. a kind of dropping assembly according to claim 1, is characterized in that: the length of the second described drill collar is 3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520644310.7U CN204899776U (en) | 2015-08-25 | 2015-08-25 | Dropping assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520644310.7U CN204899776U (en) | 2015-08-25 | 2015-08-25 | Dropping assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204899776U true CN204899776U (en) | 2015-12-23 |
Family
ID=54921962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520644310.7U Active CN204899776U (en) | 2015-08-25 | 2015-08-25 | Dropping assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204899776U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484669A (en) * | 2016-01-06 | 2016-04-13 | 延长油田股份有限公司西区采油厂 | Device for controlling bending degree of single-bent screw underground |
| CN109281612A (en) * | 2018-09-29 | 2019-01-29 | 中国石油大学(华东) | A kind of high speed rotating drilling anti-inclining drill combination |
-
2015
- 2015-08-25 CN CN201520644310.7U patent/CN204899776U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484669A (en) * | 2016-01-06 | 2016-04-13 | 延长油田股份有限公司西区采油厂 | Device for controlling bending degree of single-bent screw underground |
| CN109281612A (en) * | 2018-09-29 | 2019-01-29 | 中国石油大学(华东) | A kind of high speed rotating drilling anti-inclining drill combination |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |