CN104499959A - Novel vertical drilling tension anti-deviation drill collar - Google Patents

Novel vertical drilling tension anti-deviation drill collar Download PDF

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Publication number
CN104499959A
CN104499959A CN201410778239.1A CN201410778239A CN104499959A CN 104499959 A CN104499959 A CN 104499959A CN 201410778239 A CN201410778239 A CN 201410778239A CN 104499959 A CN104499959 A CN 104499959A
Authority
CN
China
Prior art keywords
drill collar
tungsten alloy
bearing
pressure
alloy pressure
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.)
Pending
Application number
CN201410778239.1A
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Chinese (zh)
Inventor
林元华
邓宽海
马尚余
熊浩
刘婉颖
曾德智
孔祥伟
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Southwest Petroleum University
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Southwest Petroleum University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Southwest Petroleum University filed Critical Southwest Petroleum University
Priority to CN201410778239.1A priority Critical patent/CN104499959A/en
Publication of CN104499959A publication Critical patent/CN104499959A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/16Drill collars
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/04Directional drilling
    • E21B7/10Correction of deflected boreholes

Abstract

The invention provides a novel vertical drilling tension anti-deviation drill collar. The novel vertical drilling tension anti-deviation drill collar mainly comprises an upper drill collar, a lower drill collar and a tungsten alloy pressure-bearing inner pipe. In the assembly process of the upper and lower drill collars, the tungsten alloy pressure-bearing inner pipe is stressed through the interference allowance of the tungsten alloy pressure-bearing inner pipe, the upper and lower drill collars are under the action of axial tensile force, and drilling pressure acting on the drill collar can be counteracted at a great degree through the axial tensile force, so that the drill collar is under a very low axial pressure in a drilling process, the loss of stability is prevented, and well deviation caused by bending deformation is prevented; moreover, even when well deviation occurs, the upper point of tangency of the novel drill collar is higher than the upper drill collar of the conventional drill collar, and the tungsten alloy pressure-bearing inner pipe has a large mass, so that the dead weight of the drill collar is increased, and the pendulum force is remarkably enhanced, namely, the deviation reduction force is enhanced, so that a rapid well straightening effect is achieved. The novel vertical drilling tension anti-deviation drill collar is simple in structure, is convenient for field operation, can work stably under a well for a long time, and is suitable for the field of petroleum and natural gas drilling.

Description

The anti-oblique drill collar of a kind of new vertical drilling well tension
Technical field
The present invention relates to oil and gas well drilling drilling tool field, specifically the anti-oblique drill collar of a kind of new vertical drilling well tension.
Background technology
In the drilling process of petroleum gas, the anisotropy that the bit side force caused due to stratum and anisotropy thereof, drill stem buckling, drill bit structure cause, the drilled wellbore trajectories of drill bit often departs from the theory locus of engineering design, causes hole deviation thus.But, hole deviation is crossed conference and is caused following 5 aspect impacts to oilfield prospecting developing each stage: (1) hole deviation crosses conference makes well depth produce error, make acquired geologic information distortion, make shaft bottom away from designing well location, miss oil-gas Layer and cause the error of investigation and prospecting.(2) hole deviation is crossed conference and is made well depart from former design well location, upsets oil-gas field development pattern of well.(3) in drilling process, in inclined shaft, drill string reclines the borehole wall, sleeve rotating, produces serious friction; In hole deviation sudden change well section, drill string is flexible, thus easily makes drill string wear and fracture.(4) hole deviation cross conference cause setting of casing difficulty and under the sleeve pipe that enters placed in the middle, directly affect cementing quality, cause well cementation to alter groove, the outer blow-out of pipe.(5) hole deviation crosses laminated distributor under well exploitation and the water filling that conference directly affects producing well, causes lower packet difficulty, packer sealing bad.
For reducing hole deviation, reduce the down-hole accident that hole deviation causes, spudder authors develop and apply multiple slope-preventing device, as pendulum assembly, packed hole assembly, off-axis drilling tool, flexible drill string and vertical drilling system (mainly comprising: Verti Trak closed loop guidance system, Power V rotary steering system and Geo-Pilot rotary steerable drilling system).It should be noted that: although the anti-oblique effect of vertical drilling system is better, this technology is monopolized by offshore company, and lease expenses is very expensive.And all the other several anti-deviation devices are for fear of respective working mechanism, receive larger restriction in actual applications: (1) pendulum assembly takes little the pressure of the drill to hang up and beat, exchange the raising of wellbore quality for sacrifice bit speed for cost; (2) packed hole assembly have employed large near-bit stabilizer, and torque resistance is increased, and differential sticking and the increase of drilling tool failure risk occur; (3) stress of off-axis drilling tool is concentrated and is dropped on threaded portion, makes it easily rupture, fatigue failure; (4) stress of flexible drill string is concentrated and is dropped on drilling tool thread junction, under long-term alternating stresses effect, at area of stress concentration, forms microfissure gradually, causes the connecting thread fatigue failure of centralizer or cooperation joint.In a word, for improving drilling speed, at present when drilling straight-hole, generally apply enough large the pressure of the drill by drill collar to drill bit, thus make drill collar be subject to larger axial compression, and known according to pressure bar stabilization theory, drill collar easily bends under pressure effect at larger axis, thus causes hole deviation.
Therefore, for solving the hole deviation problem in drilling process, and overcome the easily curved deficiency of existing anti-deviation device pressurized, based on deflecting control, theoretical and pressure bar stabilization theory, the present invention proposes the anti-oblique drill collar of a kind of new vertical drilling well tension.
Summary of the invention
The object of the present invention is to provide a kind of structure simple and can the anti-oblique drill collar of tension of the continuous long-time stable work in down-hole, under the pressure of the drill meeting the effective fractured rock of drill bit, by deflecting control in the reasonable scope, the pressure of the drill is liberated further, improving bit speed, realizing the anti-oblique unification with beating soon.
The present invention seeks to be achieved through the following technical solutions:
The anti-oblique drill collar of vertical drilling tension that the present invention proposes mainly comprises: pipe, upper drill collar, upper drill collar male joint, lower drill collar female joint, lower drill collar, annular channel space, lower drill collar male joint and reserved annular space in upper drill collar female joint, tungsten alloy pressure-bearing.Wherein, upper drill collar and lower drill collar mate completely, by upper drill collar male joint and lower drill collar female joint compact siro spinning technology integral, and be processed with the identical reserved annular space of size at upper drill collar and lower drill collar inside, in tungsten alloy pressure-bearing, the external diameter of pipe equals the diameter of reserved annular space, in tungsten alloy pressure-bearing, the internal diameter of pipe equals the diameter in annular channel space, and in tungsten alloy pressure-bearing, the length of pipe is slightly larger than the total length reserving annular space in upper drill collar and lower drill collar; Before fit on drill collar and lower drill collar, first pipe in tungsten alloy pressure-bearing is loaded reserved annular space, by the male joint of upper drill collar and the female joint of lower drill collar, upper and lower drill collar is linked into an integrated entity again, and in upper and lower drill collar assembling process, utilize the interference margin (can according to the actual well drilled operating mode of down-hole design modifying) of pipe in pressure-bearing, applying pretightning force by screw thread makes pipe in pressure-bearing be in pressured state, upper and lower drill collar is in tension state, make upper and lower drill collar be subject to the effect of axial tension, thus form the anti-oblique drill collar of vertical drilling tension.
Theoretical and pressure bar stabilization theory is known based on deflecting control, occur in drilling process that the main cause of hole deviation is: for realizing creeping into, the drill collar be connected with drill bit must be subject to the effect of the pressure of the drill, and drill collar is in compressive state under the effect of the pressure of the drill, when the pressure of the drill is excessive, the axial compression that drill collar is subject to is greater than its stable critical pressure, and drill collar can be lost stable and occur bending and deformation, the drill bit be attached thereto also can offset, thus causes hole deviation.But, the anti-oblique drill collar of a kind of vertical drilling tension that the present invention proposes is subject to an axial tensile loads in advance, to a great extent can negative function the pressure of the drill on drill collar, guarantee that drill collar is subject to very little axial compression effect in drilling process, make drill collar not easily lose stable and occur bending and deformation, thus not easily there is hole deviation because of the flexural deformation of drill collar in well.
The present invention designs according to deflecting control theory and pressure bar stabilization theory.Even if well generation hole deviation, the incision superius position of the anti-oblique drill collar of vertical drilling tension is higher than the incision superius position of conventional drill collar, and the large quality of tungsten alloy contributes to improving drill collar deadweight in addition, and pendulum force is enlarged markedly, namely drop angle power strengthens, thus plays the effect of quick well straightening.
The present invention compared with prior art tool has the following advantages:
(1) structure simple, be convenient to execute-in-place, can be long-time at down-hole steady operation continuously;
(2) strong adaptability, according to the actual well drilled operating mode of down-hole, can carry out adjusted design to the anti-oblique drill collar of this vertical drilling tension, under ensureing the prerequisite that hole deviation is controlled in zone of reasonableness, liberating the pressure of the drill to greatest extent, improve the rate of penetration of drilling well, realizing the anti-oblique unification with beating soon.
Accompanying drawing explanation
Fig. 1 is the anti-oblique drill collar structural representation of vertical drilling tension.
Fig. 2 is upper drill collar and reserved annular space schematic diagram.
Fig. 3 is lower drill collar and reserved annular space schematic diagram.
Detailed description of the invention
As shown in drawings, the anti-oblique drill collar of vertical drilling tension that the present invention proposes mainly comprises: pipe 2, upper drill collar 3, upper drill collar male joint 4, lower drill collar female joint 5, lower drill collar 6, annular channel space 7, lower drill collar male joint 8 and reserved annular space 9 in upper drill collar female joint 1, tungsten alloy pressure-bearing.Wherein, upper drill collar 3 and lower drill collar 6 mate completely, by upper drill collar male joint 4 and lower drill collar female joint 5 compact siro spinning technology integral, and be processed with the identical reserved annular space 9 of size at upper drill collar 3 and lower drill collar 6 inside, in tungsten alloy pressure-bearing, the external diameter of pipe 2 equals the diameter of reserved annular space 9, in tungsten alloy pressure-bearing, the internal diameter of pipe 2 equals the diameter in annular channel space 7, and in tungsten alloy pressure-bearing, the length of pipe 2 is slightly larger than the total length reserving annular space 9 in upper drill collar 3 and lower drill collar 6, before fit on drill collar 3 and lower drill collar 6, first pipe 2 in tungsten alloy pressure-bearing is loaded reserved annular space 9, again by upper drill collar male joint 4 and lower drill collar female joint 5 by upper, lower drill collar 3 and 6 links into an integrated entity, and upper, in lower drill collar 3 and 6 assembling process, utilize the interference margin (can according to the actual well drilled operating mode of down-hole design modifying) of pipe 2 in tungsten alloy pressure-bearing, applying pretightning force by screw thread makes pipe 2 in tungsten alloy pressure-bearing be in pressured state, on, lower drill collar 3 and 6 is in tension state, make, lower drill collar 3 and 6 is subject to the effect of axial tension, thus form the anti-oblique drill collar of vertical drilling tension.
When the anti-oblique drill collar of use vertical drilling tension, upper drill collar female joint 1 is connected with upper drilling string, and lower drill collar male joint 8 is connected with drill bit, and G.I.H, starts ground installation, applies the pressure of the drill and moment of torsion, formation drilling to drill bit.

Claims (1)

1. the anti-oblique drill collar of new vertical drilling well tension, is characterized in that this novel drill collar mainly comprises: pipe (2), upper drill collar (3), upper drill collar male joint (4), lower drill collar female joint (5), lower drill collar (6), annular channel space (7), lower drill collar male joint (8) and reserved annular space (9) in upper drill collar female joint (1), tungsten alloy pressure-bearing, at upper and lower drill collar (3,6) identical reserved annular space (9) is processed with in, in tungsten alloy pressure-bearing, pipe (2) external diameter equals reserved annular space (9) diameter, in tungsten alloy pressure-bearing, pipe (2) internal diameter equals the diameter of annular channel space (7), in tungsten alloy pressure-bearing, the length of pipe (2) is slightly larger than the total length reserving annular space (9) in upper and lower drill collar (3,6), fit on, lower drill collar (3, 6) before, first load reserved annular space (9) by managing (2) in tungsten alloy pressure-bearing, again by upper drill collar male joint (4) and lower drill collar female joint (5) by upper, lower drill collar (3, 6) link into an integrated entity, and upper, lower drill collar (3, 6) in assembling process, utilize the interference margin of pipe (2) in tungsten alloy pressure-bearing, applying pretightning force by screw thread makes pipe (2) in tungsten alloy pressure-bearing be in pressured state, on, lower drill collar (3, 6) tension state is in, make, lower drill collar (3, 6) effect of axial tension is subject to, and this axial tension to a great extent can negative function the pressure of the drill on drill collar, guarantee that drill collar is subject to very little axial compression effect in drilling process, not easily lose stable and occur bending and deformation and cause hole deviation, in addition, even if well generation hole deviation, the incision superius position of this novel drill collar is higher than the incision superius position of conventional drill collar, in addition in tungsten alloy pressure-bearing, the large quality of pipe (2) contributes to improving drill collar deadweight, pendulum force is enlarged markedly, namely drop angle power strengthens, thus plays the effect of quick well straightening, when using this novel drill collar, on it, drill collar female joint (1) is connected with drill string, and lower drill collar male joint (8) is connected with drill bit.
CN201410778239.1A 2014-12-16 2014-12-16 Novel vertical drilling tension anti-deviation drill collar Pending CN104499959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410778239.1A CN104499959A (en) 2014-12-16 2014-12-16 Novel vertical drilling tension anti-deviation drill collar

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Application Number Priority Date Filing Date Title
CN201410778239.1A CN104499959A (en) 2014-12-16 2014-12-16 Novel vertical drilling tension anti-deviation drill collar

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110029936A (en) * 2019-04-23 2019-07-19 西南石油大学 A kind of injection pressure formula bilayer drill string deviation control with drilling straight well drilling tool
CN111502572A (en) * 2020-05-08 2020-08-07 长江大学 Radial drilling and drilling control valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4278138A (en) * 1980-01-21 1981-07-14 Christensen, Inc. Composite heavy metal drill collar
CN2793299Y (en) * 2005-01-31 2006-07-05 中国石油大学(北京) Drawn driller
US20080128169A1 (en) * 2006-12-04 2008-06-05 Radford Steven R Restriction element trap for use with an actuation element of a downhole apparatus and method of use
CN201265358Y (en) * 2008-09-25 2009-07-01 西部钻探吐哈钻井公司 Anti-slanting drilling tool of combined hydraulic thrust device
CN201874462U (en) * 2010-12-07 2011-06-22 中国石油集团西部钻探工程有限公司 Flexible pressurizing drilling tool capable of correcting and preventing deviation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4278138A (en) * 1980-01-21 1981-07-14 Christensen, Inc. Composite heavy metal drill collar
CN2793299Y (en) * 2005-01-31 2006-07-05 中国石油大学(北京) Drawn driller
US20080128169A1 (en) * 2006-12-04 2008-06-05 Radford Steven R Restriction element trap for use with an actuation element of a downhole apparatus and method of use
CN201265358Y (en) * 2008-09-25 2009-07-01 西部钻探吐哈钻井公司 Anti-slanting drilling tool of combined hydraulic thrust device
CN201874462U (en) * 2010-12-07 2011-06-22 中国石油集团西部钻探工程有限公司 Flexible pressurizing drilling tool capable of correcting and preventing deviation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110029936A (en) * 2019-04-23 2019-07-19 西南石油大学 A kind of injection pressure formula bilayer drill string deviation control with drilling straight well drilling tool
CN110029936B (en) * 2019-04-23 2020-06-30 西南石油大学 Injection-type double-layer drill string anti-deviation straight drilling tool
CN111502572A (en) * 2020-05-08 2020-08-07 长江大学 Radial drilling and drilling control valve

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Application publication date: 20150408

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