CN101713279B - Deviation prevention and fast drilling technology of eccentric drilling tool assembly - Google Patents
Deviation prevention and fast drilling technology of eccentric drilling tool assembly Download PDFInfo
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- CN101713279B CN101713279B CN 200910210075 CN200910210075A CN101713279B CN 101713279 B CN101713279 B CN 101713279B CN 200910210075 CN200910210075 CN 200910210075 CN 200910210075 A CN200910210075 A CN 200910210075A CN 101713279 B CN101713279 B CN 101713279B
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Abstract
The invention relates to the field of oil and gas drilling, and provides the deviation prevention and fast drilling technology of an eccentric drilling tool assembly. The eccentric drilling tool assembly comprises a drill, an eccentric controller, a common stabilizer, a plurality of drill collars and the like, wherein the eccentricity of the eccentric controller is determined by borehole diameter expansion rate; space (length of the drill collar) between the eccentric controller and the common stabilizer is generally between 4 and 7m; space between the drill and the eccentric controller is generally controlled to be between 0.5 and 2.0m, and the values can be calculated and determined by an analysis program of the bottom drilling tool assembly (Bottom hole Assembly, BHA for short) based on drill string mechanics. The eccentric drilling tool assembly can generate large comprehensive dropping bending moment and drill dropping force in the process of rotary drilling. The technology can achieve ideal purposes of preventing deviation and fast drilling when a driller drills a stratum susceptible to inclination.
Description
Technical field
The present invention is a kind of deviation prevention and fast technology that is applied in the rotary drilling engineering, adopts the eccentric drilling device combination, can the effectively increase of control hole deviation under the prerequisite of liberation the pressure of the drill.
Background technology
Hole deviation is ubiquitous technical barrier in the drilling engineering, directly affects drilling quality and speed, serious probing and production efficiency and the benefit that restricts the resources such as lower oil gas that land.No matter be straight well, or directional well or complex structural well, all there is hole deviation control problem.Easily tiltedly in the layer drilling engineering, the hole deviation problem is still very serious at the steep structure of height etc.At present, pendulum assembly control hole deviation is still mainly used at domestic scene, is boring when meeting easily tiltedly layer normally to sacrifice the pressure of the drill even " the light pressure hung up and beaten " guarantees hole deviation control quality, thereby is making the contradiction of fast drilling and deviation control with drilling straight well more outstanding.External High-tech company has released the automatic vertical drilling system on the basis of rotary steerable tool, such as the Power V system of Schlumberger company, and the VertiTak system of Baker Hughes Inteq company, etc.Yet because too high technological service price and real restriction of boring the technical factors such as stratum high-temperature high pressure, this class high-tech still is difficult to apply in China.Therefore, domestic in the urgent need to a kind of cost-effective Well Deviation Technique, it can break through the anti-oblique theory of traditional statics and drilling assembly type (such as pendulum assembly etc.), is different from again external high automatic vertical drilling system.
Summary of the invention
The invention provides a kind of deviation prevention and fast drilling technology of eccentric drilling tool assembly.This eccentric drilling device combination comprises the compositions such as a drill bit, an eccentricity control device, a common stabilizer and some drill collars.The eccentric throw of eccentricity control device is calculated and is determined through amplification degree according to well; The spacing of eccentricity control device and common stabilizer (drill collar length) is calculated by the Bottom Hole Assembly (BHA) routine analyzer and is determined, under the prerequisite that other parameters are determined, optimum spacing should make every effort to make drill bit increasing hole angle power to go to zero or minimum value.The spacing general control of drill bit and eccentricity control device is in 0.5m～1.5m scope, and concrete value can be calculated and determines by the BHA routine analyzer.
The present invention meet the eye on every side stabilizer by top can produce the larger moment of flexure that makes the drill bit drop angle at lower eccentric controller place; Rib is arranged on the periphery of described eccentricity control device main part in the shape of a spiral.As shown in Figure 2, the rib width relative with eccentric throw is greater than other ribs, to be conducive to reduce wearing and tearing.The eccentricity control device is with one week of drill string rotating, can produce different hole deviation power in different angles, there is drop angle power that increasing hole angle power is also arranged, carry out excellent words by the BHA analysis software of researching and developing special use and regulate drill collar distance between two stabilizers, make the eccentricity control device with in the drill string rotating process in one week, it is minimum that the increasing hole angle power that drill bit produces is tending towards, thereby make drill bit be subject to generally drop angle power, and therefore whole drilling assembly can play the effect of drop angle.Yet, in drilling process, use common stabilizer, easily between stabilizer and well, produce larger radial clearance, can't satisfy BHA for the basic demand of stabilizer place radial clearance; There is eccentric structure in the eccentricity control device, and the one side can keep good contact with the borehole wall, and the existence of eccentric throw can the establishment well enlarge the impact that brings.In addition, thereby the eccentric throw of eccentricity control device can make that drill collar is crooked to be made drill bit depart from borehole axis to produce a corner, the eccentricity control device when rotated, drive the drill bit with corner evenly cut the borehole wall around, thereby can realize effectively anti-oblique.Thereby realize generally anti-oblique function.
With the BHA of eccentricity control device, consisted of by element of construction such as drill bit, eccentricity control device, common stabilizer and drill collars.Through optimization stabilizer eccentric throw and individual each span from after, both had the anti-oblique effect of kinetics, have again the function of moment of flexure drop angle.In case the well hole deviation begins to increase, in the strong inhibition increasing hole angle, powerful drop angle power can play again the effect of effective drop angle.
Description of drawings
Further describe the present invention below in conjunction with accompanying drawing:
Fig. 1 is eccentric drilling device combination schematic diagram
Fig. 2 is eccentricity control device schematic diagram
Among the figure 1, full-scale stable weapon 2, eccentricity control device 3, drill bit 4, the borehole wall
5, eccentricity control device rib 6, eccentric throw
The specific embodiment
Hole deviation occurred in the drilling process of the well of 215.9mm (81/2inch), can adopt drop angle of the present invention, concrete steps are as follows:
(1) enters easily tiltedly layer, or find that hole deviation exceeds standard, original drilling assembly is pulled out of hole, connects combination with the Bottom Hole Assembly (BHA) of eccentricity control device, as shown in Figure 1: 215.9mm drill bit+0.51m conversion pipe nipple+215.9mm eccentricity control device+5m stub boring quickly+215mm meet the eye on every side stabilizer+drill collar.With its G.I.H.
(2) the bottom combination is applied the pressure of the drill that mates with the stratum, drill collar will produce very large drop angle moment of flexure owing to gravity and the pressure of the drill act on eccentricity control device place, the drop angle moment of flexure can be converted into the powerful drop angle power of drill bit, reduce the well gradient thereby make, pay close attention to hole deviation by inclinometer and change.
(3) according to the variation tendency of stratum deflecting degree and hole angle, the pressure of the drill can be regulated so that in well straightening, fast drilling if skew velocity is very slow, can reduce the pressure of the drill, fast well straightening; If well straightening can strengthen the pressure of the drill fast drilling smoothly.
(4) get out easily tiltedly layer, reach the hole deviation that needs after, trip out the eccentric drilling device combination, convert other drilling assembly to.
The above only is the schematic specific embodiment of the present invention, is not to limit scope of the present invention.Any those skilled in the art, the equivalent variations of doing under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (3)
1. eccentric drilling device combination, this eccentric drilling device combination comprises a drill bit, an eccentricity control device, a stabilizer and some drill collars; It is characterized in that:
Eccentricity control device two ends are the API standard thread, and an end is pin thread, and the other end is box; Termination drill collar on the eccentricity control device, lower end connect crossover sub or directly are connected with drill bit, and inside is the circular duct of negotiable drilling fluid;
The center of circle of eccentricity control device cylindrical is not consistent with the center of circle of institute's connection drill collar, and eccentric throw between the two designs through amplification degree according to well.
2. eccentric drilling device combination as claimed in claim 1, it is characterized in that: rib is arranged on the periphery of described eccentricity control device main part in the shape of a spiral, and the rib width relative with eccentric throw is greater than other ribs.
3. eccentric drilling device combination as claimed in claim 1 is characterized in that: the spacing of drill bit and eccentricity control device is at 0.5m～2.0m, and concrete value is calculated by the Bottom Hole Assembly (BHA) routine analyzer and determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910210075 CN101713279B (en) | 2009-11-04 | 2009-11-04 | Deviation prevention and fast drilling technology of eccentric drilling tool assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910210075 CN101713279B (en) | 2009-11-04 | 2009-11-04 | Deviation prevention and fast drilling technology of eccentric drilling tool assembly |
Publications (2)
| Publication Number | Publication Date |
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| CN101713279A CN101713279A (en) | 2010-05-26 |
| CN101713279B true CN101713279B (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910210075 Expired - Fee Related CN101713279B (en) | 2009-11-04 | 2009-11-04 | Deviation prevention and fast drilling technology of eccentric drilling tool assembly |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742074B (en) * | 2013-12-25 | 2015-12-30 | 中国石油大学(华东) | A kind of deviation prevention and fast drilling assembly |
| CN104481399B (en) * | 2014-11-20 | 2016-08-24 | 西南石油大学 | A kind of nearly drill bit borehole trace control tool and control method thereof |
| CN107642333A (en) * | 2017-10-09 | 2018-01-30 | 中国石油天然气集团公司 | Slanting-proof quick-drilling utensil |
| CN115270345B (en) * | 2022-08-04 | 2023-08-25 | 中国地质调查局长沙自然资源综合调查中心 | Calculation method based on continuous Liang Shengsuo coring anti-skew drilling tool mechanical model |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2126305U (en) * | 1992-05-16 | 1992-12-30 | 四川省地质矿产局二○八水文地质工程地质队 | Plug-in type eccentric borehole-enlarging drilling device |
| US5484029A (en) * | 1994-08-05 | 1996-01-16 | Schlumberger Technology Corporation | Steerable drilling tool and system |
| CN2431390Y (en) * | 2000-07-03 | 2001-05-23 | 石油勘探开发科学研究院钻井工艺研究所 | Remote-controlled mechanical hydraulic inclination reducing tool in well |
| GB2373272A (en) * | 2001-03-15 | 2002-09-18 | Xl Technology Ltd | A variable orientation downhole tool |
| CN2591209Y (en) * | 2002-10-29 | 2003-12-10 | 无锡市双帆钻凿设备有限公司 | Double-drive twisting mechanism for eccentric heel pipe drilling device |
| CN1955437A (en) * | 2005-10-28 | 2007-05-02 | 中国石油大学(北京) | Automatic anti-oblique well drilling tool |
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2009
- 2009-11-04 CN CN 200910210075 patent/CN101713279B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2126305U (en) * | 1992-05-16 | 1992-12-30 | 四川省地质矿产局二○八水文地质工程地质队 | Plug-in type eccentric borehole-enlarging drilling device |
| US5484029A (en) * | 1994-08-05 | 1996-01-16 | Schlumberger Technology Corporation | Steerable drilling tool and system |
| CN2431390Y (en) * | 2000-07-03 | 2001-05-23 | 石油勘探开发科学研究院钻井工艺研究所 | Remote-controlled mechanical hydraulic inclination reducing tool in well |
| GB2373272A (en) * | 2001-03-15 | 2002-09-18 | Xl Technology Ltd | A variable orientation downhole tool |
| CN2591209Y (en) * | 2002-10-29 | 2003-12-10 | 无锡市双帆钻凿设备有限公司 | Double-drive twisting mechanism for eccentric heel pipe drilling device |
| CN1955437A (en) * | 2005-10-28 | 2007-05-02 | 中国石油大学(北京) | Automatic anti-oblique well drilling tool |
Non-Patent Citations (2)
| Title |
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| 宋执武等.不倒翁式偏心防斜钻具的设计.《石油机械》.2006,(第08期), * |
| 高德利.易斜地层防斜打快钻井理论与技术探讨.《石油钻探技术》.2005,(第05期), * |
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| CN101713279A (en) | 2010-05-26 |
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