CN2532227Y - Deviation control tool for gone off hole - Google Patents
Deviation control tool for gone off hole Download PDFInfo
- Publication number
- CN2532227Y CN2532227Y CN 02205258 CN02205258U CN2532227Y CN 2532227 Y CN2532227 Y CN 2532227Y CN 02205258 CN02205258 CN 02205258 CN 02205258 U CN02205258 U CN 02205258U CN 2532227 Y CN2532227 Y CN 2532227Y
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- Prior art keywords
- force
- drill
- eccentric
- drill collar
- drill bit
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Abstract
The utility model relates to an off-axis and eccentric well drilling anti-deviation tool connected to a well drill in an oil field, providing an anti-deviation tool which can increase the yawing force and straightening force of a drill bit. A part of a cambered body (3) is cut off in the axial direction from a drill collar (2) body connected to the drill bit; the centers (6) of a female and a male threaded holes formed on an upper and a lower connectors (1, 4) of the drill collar (2) are eccentric; the radian of the cambered body (3) is equal to or less than pai; the thickness of the cambered body (3) is about two thirds of the wall thickness of the drill collar (2). The utility model greatly increases the straightening force of the drill bit and is applicable to well drilling construction; first, the pendulum force of the original drill structure is maintained, and second, large eccentric force is produced by off-axis and eccentric technology; that is, the straightening force of the drill bit in the utility model is the double effects of the pendulum force plus the eccentric force, facilitating bit pressure release and improving well drilling speed. The concerned computed and tryout results show that for a Phi215 mm well bore, the eccentric force of the common drill is 0.2 KN while the eccentric force of the improved drill reaches 8 KN.
Description
(1) technical field:
The utility model relates to the off-axis eccentric well anti-deviation device that the oil field connects on the drilling tool in the well-digging process.
(2) background technology:
At present, at Process of Oil Well Drilling middle and lower part drilling tool, adopt the drill collar of wall thickness to apply the pressure of the drill to drill bit, wherein drilling tool all is a concentric.In drilling process, run into easy lower curved section and generally adopt the thin drilling rod of epimere wall, bottom to adopt the pendulum assembly of all connection of drill collar of wall thickness, its objective is weight by drill collar in rotary course, exert pressure to drill bit in and give birth to lateral force.But this lateral force is than little many of the pressure of the drill, in the well-digging process, when running into the purpose that the big easy lower curved section such as grade in pendage angle is difficult to reach anti-oblique well straightening.Adopt the decompression method of hanging up and beating for the purpose that reaches the control hole deviation, promptly control brake lever to make the top drilling tool outer, impose on the drill bit with the weight of sub-fraction lower drilling tool in suspended state by the terrestrial operation people; Its result reduces drilling speed and promptly sacrifices rate of penetration as cost, has had a strong impact on bit speed, has prolonged drilling period, has increased drilling cost.
(3) utility model content:
Technical problem to be solved in the utility model is at the problem that exists in the background technology, and a kind of off-axis eccentric well anti-deviation device (drill collar) that increases bit side force, restoring force is provided.
The invention for solving the technical problem can reach by following technical solution: it downcuts a part of arc body in the axial direction on the drill collar body that connects on the drill bit, and the center of the yin, yang screwed hole that forms on the upper and lower joint of drill collar is eccentric;
In such scheme, the radian≤π of arc body, the thickness of arc body is about 2/3rds of drill collar wall thickness.Changed present drill collar structure in order to reach the purpose that increases bit side force.The one, on the basis of improving conventional drill collar outside dimension, adopt special process upwards to machine away arc body greatly at drill collar one side shaft, make the drill collar center of gravity asymmetric, make this drill collar produce bigger eccentric force during dial rotation.The 2nd, the lower union joint axis produces certain distance with former drill collar center line in the other direction in the section of laying particular stress on the drill collar, its objective is the eccentric force that generation is bigger.The purpose of using the off-axis decentralized drill collar is to produce dual eccentric force under the high rotating speed, reaches anti-oblique, well straightening purpose.
The utility model is compared with the above-mentioned background technology can have following beneficial effect: the utility model has greatly increased the drill bit restoring force, and is convenient to use in the wellbore construction.The one, the pendulum force of the former drilling tool structure of reservation.The 2nd, produce very big eccentric force by the eccentric technological means of off-axis.Just the drill bit restoring force of this utility model generation is that pendulum force adds the eccentric force double effects, helps liberating the pressure of the drill, improves bit speed.Relevant calculation and result on trial show that in φ 215mm well, the eccentric force of general pendulum assembly is 0.2KN, and the eccentric force after correcting one's mistakes can reach 8KN.Bit side force (restoring force) after this explanation improves improves 40 times than original.
(4) description of drawings:
Accompanying drawing 1 is the front view of the former drill collar that is connected with drill bit;
Accompanying drawing 2 is ends A on Fig. 1-A sectional views;
Accompanying drawing 3 is front views of this drill collar of being connected with drill bit;
Accompanying drawing 4 is A-A sectional views on Fig. 3;
Accompanying drawing 5 is that the center of two ends reflection negative and positive screwed hole on Fig. 3 is eccentric sectional view.
(5) specific embodiment:
Below in conjunction with the drawings and specific embodiments will the utility model is described in further detail:
By accompanying drawing 3,4, shown in 5, downcut a part of arc body 3 in the axial direction on brill chain 2 bodies that connect on the drill bit, the center 6 that brill chain 2 upper and lower joints (1,4) are gone up the yin, yang screwed hole that forms is eccentric;
In such scheme, the radian≤π of arc body 3, the thickness of arc body 3 are about 2/3rds of brill chain (2) wall thickness.Changed present drill collar structure in order to reach the purpose that increases bit side force.The one, on the basis of improving conventional drill collar outside dimension, adopt special process upwards to machine away arc body greatly at drill collar one side shaft, make the drill collar center of gravity asymmetric, make drill collar produce bigger eccentric force during dial rotation.The 2nd, the lower union joint axis produces certain distance with former drill collar center line 5 in the other direction in the section of laying particular stress on the drill collar, its objective is the eccentric force that generation is bigger.The purpose of using off-axis eccentric bit chain is to produce dual eccentric force under the high rotating speed, reaches anti-oblique, well straightening purpose.
Claims (3)
1, a kind ofly relates to the off-axis eccentric well anti-deviation device that the oil field connects on the drilling tool in drilling process, contain drill bit, its top grade is: downcut a part of arc body (3) in the axial direction on the drill collar that connects on the drill bit (2) body, the center (6) that the upper and lower joint of drill collar (2) (1,4) is gone up the yin, yang screwed hole that forms is eccentric.
2, anti-deviation device according to claim 1 is characterized in that: the radian≤π of arc body (3).
3, anti-deviation device according to claim 1 and 2 is characterized in that: the thickness of arc body (3) is about 2/3rds of drill collar (2) wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02205258 CN2532227Y (en) | 2002-03-11 | 2002-03-11 | Deviation control tool for gone off hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02205258 CN2532227Y (en) | 2002-03-11 | 2002-03-11 | Deviation control tool for gone off hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2532227Y true CN2532227Y (en) | 2003-01-22 |
Family
ID=33686960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02205258 Expired - Fee Related CN2532227Y (en) | 2002-03-11 | 2002-03-11 | Deviation control tool for gone off hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2532227Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102597413A (en) * | 2009-07-01 | 2012-07-18 | 史密斯国际公司 | Hydraulically locking stabilizer |
| CN108071342A (en) * | 2018-01-31 | 2018-05-25 | 吉林大学 | Synergistic effect formula drilling tool is laid particular stress in the adjustable shunting of one kind |
-
2002
- 2002-03-11 CN CN 02205258 patent/CN2532227Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102597413A (en) * | 2009-07-01 | 2012-07-18 | 史密斯国际公司 | Hydraulically locking stabilizer |
| CN108071342A (en) * | 2018-01-31 | 2018-05-25 | 吉林大学 | Synergistic effect formula drilling tool is laid particular stress in the adjustable shunting of one kind |
| CN108071342B (en) * | 2018-01-31 | 2023-09-29 | 吉林大学 | Adjustable reposition of redundant personnel unbalance weight synergism formula drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |