CN103174791A - Drilling column shock excitation anti-drag tool - Google Patents
Drilling column shock excitation anti-drag tool Download PDFInfo
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- CN103174791A CN103174791A CN2013100955022A CN201310095502A CN103174791A CN 103174791 A CN103174791 A CN 103174791A CN 2013100955022 A CN2013100955022 A CN 2013100955022A CN 201310095502 A CN201310095502 A CN 201310095502A CN 103174791 A CN103174791 A CN 103174791A
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- eccentric shaft
- drill string
- tool joint
- eccentric
- joint pins
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Abstract
The invention relates to the field of drilling tools of oil and natural gas, in particular to a drilling anti-drag tool which is used for stimulating a drilling column to produce periodical vibration. The tool comprises double female sleeves and upper double male connectors and lower double male connectors, wherein the upper double male connectors and the lower double male connectors are arranged at two ends of the double female sleeves in an inserting mode. The double female sleeves, the upper double male connectors and the lower double male connectors are all of hollow structures. The tool further comprises a power device and an eccentric shaft, wherein the power device is located in the upper double male connectors. The eccentric shaft is connected with the power device. A concentric section of the eccentric shaft is arranged in the hollow cavity of the double female sleeves through an alignment bearing, and an eccentric section of the eccentric shaft can rotate in the double female sleeves. According to the drilling column shock excitation anti-drag tool, positive pressure applied on a wall of a well by the drilling column is reduced periodically, static friction between the drilling column and the wall of the well is converted into dynamical friction, friction drag and moment of torsion between the drilling column and the wall of the well are obviously reduced, and the phenomena of 'pressure dragging and 'stick-slip vibration' appearing in a drilling process of a level section of a highly-deviated well and a shale gas horizontal well are effectively eliminated.
Description
Technical field
The present invention relates to oil, gas drilling field of tool, particularly relate to a kind of drilling well friction reducer that excites drill string to produce periodic vibration.
Background technique
(be the drilling well plagioclase with the ratio of vertical depth greater than 2 at high angle hole, the directional well of hole angle in 60o～86 °) (hole angle reaches or near 90 ° for long horizontal sections and shale gas horizontal well, well bore creeps into the well of certain-length along substantially horizontal) in drilling process, the part drill string leans against on the lower borehole wall, can produce very large frictional resistance and moment of torsion between drill string and the borehole wall, cause the pressure of the drill and moment of torsion successfully to be applied on drill bit, produce " dragging pressure " phenomenon, cause rate of penetration very low; Separately, between drill string and the borehole wall, huge frictional resistance can make drill string produce " stick-slip vibration " phenomenon, drill speed can reach very large value moment, be easy to cause drill string to destroy, therefore in high angle hole long horizontal sections, shale gas horizontal well crept into process, " dragging pressure " that high frictional resistance and moment of torsion cause and " stick-slip vibration " became the key factor that affects drilling efficiency.
Creeping into " dragging pressure " in process for high angle hole long horizontal sections, shale gas horizontal well reaches " stick-slip vibration " phenomenon and causes the low problem of drilling efficiency, studies show that: vibration can change the Frotteurism between friction pair, friction factor between friction pair is reduced, therefore, how will vibrate drag reduction technology and be applied to high angle hole long horizontal sections, shale gas drillstring in horizontal section drag reduction, with rate of penetration and the guarantee drilling safety that improves high angle hole long horizontal sections, shale gas horizontal well, it is an important directions of high frictional resistance well drilling technology.
Summary of the invention
The technical problem that (one) will solve
Technical problem to be solved by this invention is: high angle hole long horizontal sections, shale gas horizontal well creep in process " dragging pressure " and " stick-slip vibration " problem that exists.
(2) technological scheme
For solving the problems of the technologies described above, the invention provides a kind of drill string exciting friction reducer, this instrument comprises two mother sleeves and is inserted into the two tool joint pins of the two tool joint pins in top and bottom at its two ends, described pair of mother sleeve, the two tool joint pins of the two tool joint pins in top and bottom are the hollow setting, this instrument also comprises power plant and eccentric shaft, wherein: described power plant are positioned at the two tool joint pins in top, are used for providing rotating power; Described eccentric shaft is connected with described power plant, and the concentric segments of eccentric shaft is arranged in the hollow cavity of two mother sleeves by alignment bearing, its eccentric segment can rotate in two mother sleeves, is used for providing periodic eccentric force, this eccentric force to order about this instrument and produces periodic vibration.
Preferably, described power plant comprise line shaft, and an end of described line shaft extends in two mother sleeves vertically.
Preferably, the concentric segments of described eccentric shaft one end is fixedly connected with by coupling with line shaft.
Preferably, the concentric segments of the described eccentric shaft the other end extends in the two tool joint pins in described bottom.
Preferably, be provided with the hollow cavity that is connected in described coupling, eccentric shaft and line shaft.
Preferably, be respectively equipped with the shaft shoulder that fastens with alignment bearing on the concentric segments at described eccentric shaft two ends, be used for realizing the axially locating of alignment bearing.
Preferably, the described shaft shoulder is set to be sleeved on the abutment sleeve on eccentric shaft.
Preferably, be provided with in described pair of mother sleeve comprises coupling the two mother sleeves in top and in be provided with the two mother sleeves in bottom of eccentric shaft eccentric segment, the two mother sleeves in described top are connected by the two tool joint pins in the middle part of hollow with the two mother sleeves in bottom.
Preferably, be respectively equipped with the seal arrangement suitable with the eccentric shaft concentric segments in the hollow cavity of the two tool joint pins in described middle part and the two tool joint pins in bottom.
Preferably, be filled with lubricant oil in the cavity between the two mother sleeves in described bottom and eccentric shaft.
(3) beneficial effect
Drill string exciting friction reducer provided by the invention, order about the eccentric shaft rotation by power plant and produce eccentric force, and then order about friction reducer and near the periodic vibration of drill string generation thereof by this eccentric force, the positive pressure that makes drill string act on the borehole wall periodically reduces, make the static friction between drill string and the borehole wall become kinetic friction, significantly reduce frictional resistance and moment of torsion between drill string and the borehole wall, effectively eliminate the high angle hole long horizontal sections, the shale gas horizontal well creeps into " dragging pressure " and " stick-slip vibration " phenomenon that exists in process; Further, vibration friction reducer of the present invention can be arranged on any section of drill string by two tool joint pins at two ends, and use value is high; Further, this friction reducer is by the seal arrangement of ingenious setting, make eccentric shaft and alignment bearing be positioned at a closed chamber, the lubricant oil that fills in this closed chamber plays the lubricated and thermolysis to alignment bearing, the working life of fully having improved this instrument.
Description of drawings
Fig. 1 is embodiments of the invention 1 structure principle charts;
Fig. 2 is that the A of embodiments of the invention 1 is to sectional view;
Fig. 3 is embodiments of the invention 2 structure principle charts;
Wherein: 1, two mother sleeves, 1-1, the two mother sleeves in top, 1-2, the two mother sleeves in bottom, 2, the two tool joint pins in top, 3, the two tool joint pins in bottom, 4, power plant, 4-1, line shaft, 5, eccentric shaft, 5-1, concentric segments, 5-2, eccentric segment, 6, the shaft shoulder, 7, the two tool joint pins in middle part, 8, alignment bearing, 8-1, top alignment bearing, 8-2, bottom alignment bearing, 9, seal arrangement, 10, coupling.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for explanation the present invention, but are not used for limiting the scope of the invention.
Be embodiments of the invention 1 as shown in Figure 1, 2, a kind of drill string exciting friction reducer, this instrument comprises two mother sleeves 1, the two tool joint pins 3 of the two tool joint pins 2 in top and bottom, the two tool joint pins 3 of the two tool joint pins 2 in top and bottom are inserted into respectively the two ends of two mother sleeves 1, this instrument can be connected to any section of drill string by the two tool joint pins 3 of the two tool joint pins 2 in top and bottom, has improved the practicability of this instrument.
two mother sleeves 1, the two tool joint pins 3 of the two tool joint pins 2 in top and bottom are the hollow setting, be provided with power plant 4 and eccentric shaft 5 for generation of eccentric force in hollow cavity, to make this instrument produce periodic vibration by eccentric force, power plant 4 wherein can adopt positive displacement motor, turbine motor etc., it is positioned at the two tool joint pins 2 in top, be used for providing rotating power, the line shaft 4-1 of power plant 4 extends in two mother sleeves 1 vertically, the two tool joint pins 2 in top and line shaft 4-1 Spielpassung, to play radially spacing effect, prevent that the two tool joint pins 2 in line shaft 4-1 and top from relative rocking occuring.The two tool joint pins in top can be set to the structures such as spliced, so that the installation of power plant.
Eccentric shaft 5 is connected with described power plant 4, preferably, it is concentric segments 5-1 that eccentric shaft 5 is set to two ends, and between two ends, the relevant position has eccentric segment, the concentric segments 5-1 of eccentric shaft 5 one ends is connected with the line shaft 4-1 of power plant 4 by coupling 10, line shaft 4-1 by power plant 4 orders about eccentric shaft 5 rotations, coupling 10 wherein for example can be set to two female joints, line shaft 4-1 and eccentric shaft 5 are to be threaded or the modes such as multiaspect prism and multiaspect hole grafting are connected to the two ends of two female joints, to reduce difficulty of processing; The concentric segments 5-1 of eccentric shaft 5 at least one ends is arranged in the hollow cavity of two mother sleeves 1 by alignment bearing 8, illustrated alignment bearing is positioned at the lower end, obviously, alignment bearing also can require to be arranged on the concentric segments of upper end according to specific design, alignment bearing perhaps all is installed on the concentric segments at two ends as shown in Figure 3, by alignment bearing 8 realize to eccentric shaft 5 radially reach axial location, prevent eccentric shaft 5 and two mother sleeves 1 relative rocking of generation, guarantee that synchronous vibration can only occur for it; The eccentric segment 5-2 of eccentric shaft 5 can rotate freely in two mother sleeves 1, and namely the interior relevant position of two mother sleeves 1 has enough spaces that supply eccentric shaft 5 eccentric segments rotate freely.
Above-mentioned line shaft 4-1, coupling 10 and eccentric shaft 5 preferably are set to the hollow type structure, its hollow cavity that is connected is the drilling fluid passage, when this instrument was arranged on any a section of drill string, this hollow type structure was not blocked flowing of drilling fluid, can not affect the normal operation of drill string.
accordingly, this instrument is arranged on drill string by the two tool joint pins 3 of the two tool joint pins 2 in the top at two ends and bottom, drive eccentric shaft 5 rotations by power plant 4 by line shaft 4-1, produce eccentric force, this eccentric force is impelled eccentric shaft 5 generating period vibrations, be connected with two mother sleeves 1 by alignment bearing 8 due to eccentric shaft 5 and can only synchronous vibration, thereby, eccentric shaft 5 drives two mother sleeves 1 and synchronously carries out periodic vibration, and then, the synchronous generating period vibration of drill string that this tool drives is coupled, this periodic vibration can effectively solve the high angle hole long horizontal sections, the shale gas horizontal well creeps into " dragging pressure " of existing in process and " stick-slip vibration " phenomenon and causes the problems such as the low and drill string of drilling efficiency is easy impaired.
Obviously, be simple and structural design comparatively cheaply in embodiment 1, and in order further to improve the performances such as stability of operation, can be out of shape accordingly and improve structures such as running shaft, two mother sleeves, be as shown in Figure 3 the specific embodiment (embodiment 2) after improvement.
This embodiment has carried out corresponding improvement on embodiment 1 basis, itself and embodiment's 1 difference comprises at least: be the radial location effect of strengthening eccentric shaft 5, alignment bearing is provided with two, and namely diagram is positioned at the top alignment bearing 8-1 and the bottom alignment bearing 8-2 that is positioned at the eccentric segment below of eccentric segment top; Corresponding with top alignment bearing 8-1 and bottom alignment bearing 8-2, be respectively equipped with a shaft shoulder 6 on the concentric segments 5-1 at eccentric shaft 5 two ends, two shaft shoulders 6 fasten with two alignment bearings respectively, the axially locating that is used for alignment bearing, wherein the shaft shoulder 6 preferably is set to be sleeved on the abutment sleeve on eccentric shaft 5, to reduce processing and assembling difficulty; Be stability and reduction processing and the assembling difficulty that further improves operation, two mother sleeves 1 are set to the two mother sleeve 1-1 in top and the two mother sleeve 1-2 in bottom that are plugged in together by the two tool joint pins 7 in middle part, coupling 10 wherein is positioned at the two mother sleeve 1-1 in top, and the eccentric segment 5-2 of eccentric shaft 5 and top alignment bearing 8-1, two shaft shoulders 6, bottom alignment bearing 8-2 are positioned at the two mother sleeve 1-2 in bottom, the two tool joint pins 7 in middle part are Spielpassung with the concentric segments 5-1 of eccentric shaft 5, play auxiliary spacing effect.Separately, the concentric segments 5-1 that transmission shaft is illustrated the lower end extends in the two tool joint pins 3 in bottom vertically, and this concentric segments 5-1 is Spielpassung with the two tool joint pins 3 in bottom, to play the spacing effect of assisting.
for fully improving the working life of this instrument, need to be lubricated and dispel the heat top alignment bearing 8-1 and bottom alignment bearing 8-2, accordingly, be respectively equipped with the seal arrangement 9 suitable with eccentric shaft 5 concentric segments 5-1 in the hollow cavity of the two tool joint pins 7 in middle part and the two tool joint pins 3 in bottom, by seal arrangement 9, the two mother sleeve 1-2 in bottom form a sealing chamber, in this chamber, be to fill lubricant oil in the cavity between the two mother sleeve 1-2 in bottom and eccentric shaft 5, and the eccentric segment of eccentric shaft 5 namely rotates in the indoor lubricant oil environment of this enclosed cavity, and then play effect to top alignment bearing 8-1 and bottom alignment bearing 8-2 sufficient lubrication and heat radiation, improve the working life of alignment bearing.
It should be noted that at last, above embodiment is only unrestricted in order to technological scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those skilled in the art are to be understood that, can modify or be equal to replacement technological scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. drill string exciting friction reducer, this instrument comprises two mother sleeves and is inserted into the two tool joint pins of the two tool joint pins in top and bottom at its two ends, described pair of mother sleeve, the two tool joint pins of the two tool joint pins in top and bottom are the hollow setting, it is characterized in that, this instrument also comprises power plant and eccentric shaft, wherein:
Described power plant are positioned at the two tool joint pins in top, are used for providing rotating power;
Described eccentric shaft is connected with described power plant, and the concentric segments of eccentric shaft is arranged in the hollow cavity of two mother sleeves by alignment bearing, its eccentric segment can rotate in two mother sleeves, is used for providing periodic eccentric force, this eccentric force to order about this instrument and produces periodic vibration.
2. drill string exciting friction reducer according to claim 1, it is characterized in that: described power plant comprise line shaft, an end of described line shaft extends in two mother sleeves vertically.
3. drill string exciting friction reducer according to claim 2, it is characterized in that: the concentric segments of described eccentric shaft one end is fixedly connected with by coupling with line shaft.
4. drill string exciting friction reducer according to claim 3 is characterized in that: the concentric segments of the described eccentric shaft the other end extends in the two tool joint pins in described bottom.
5. according to claim 3 or 4 described drill string exciting friction reducers, is characterized in that: be provided with the hollow cavity that is connected in described coupling, eccentric shaft and line shaft.
6. drill string exciting friction reducer according to claim 5 is characterized in that: be respectively equipped with the axially locating that the shaft shoulder that fastens with alignment bearing is used for realizing alignment bearing on the concentric segments at described eccentric shaft two ends.
7. drill string exciting friction reducer according to claim 6, it is characterized in that: the described shaft shoulder is set to be sleeved on the abutment sleeve on eccentric shaft.
8. drill string exciting friction reducer according to claim 7, it is characterized in that: be provided with in described pair of mother sleeve comprises coupling the two mother sleeves in top and in be provided with the two mother sleeves in bottom of eccentric shaft eccentric segment, the two mother sleeves in described top are connected by the two tool joint pins in the middle part of hollow with the two mother sleeves in bottom.
9. drill string exciting friction reducer according to claim 8, is characterized in that: be respectively equipped with the seal arrangement suitable with the eccentric shaft concentric segments in the hollow cavity of the two tool joint pins in described middle part and the two tool joint pins in bottom.
10. drill string exciting friction reducer according to claim 9, is characterized in that: be filled with lubricant oil in the cavity between the two mother sleeves in described bottom and eccentric shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095502.2A CN103174791B (en) | 2013-03-22 | 2013-03-22 | Drilling column shock excitation anti-drag tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095502.2A CN103174791B (en) | 2013-03-22 | 2013-03-22 | Drilling column shock excitation anti-drag tool |
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| Publication Number | Publication Date |
|---|---|
| CN103174791A true CN103174791A (en) | 2013-06-26 |
| CN103174791B CN103174791B (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310095502.2A Active CN103174791B (en) | 2013-03-22 | 2013-03-22 | Drilling column shock excitation anti-drag tool |
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| CN (1) | CN103174791B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405287A (en) * | 2014-10-19 | 2015-03-11 | 长江大学 | Dual-pulse hydraulic oscillator for well drilling |
| CN105178860A (en) * | 2015-09-09 | 2015-12-23 | 长江大学 | Torsional pendulum oscillator |
| CN111864978A (en) * | 2020-07-29 | 2020-10-30 | 吉林大学 | Pressure-resistant columnar linear vibrator for holes |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1125353A1 (en) * | 1983-01-10 | 1984-11-23 | Волгоградский государственный научно-исследовательский и проектный институт нефтяной промышленности | Above-bit shock absorber |
| SU1633087A1 (en) * | 1988-06-14 | 1991-03-07 | Ивано-Франковский Институт Нефти И Газа | Oscillator |
| US20090266612A1 (en) * | 2008-04-29 | 2009-10-29 | Smith International, Inc. | Vibrating downhole tool |
| CN102733756A (en) * | 2012-07-23 | 2012-10-17 | 中国石油大学(华东) | Vibration and pressure well drilling tool |
| CN102747958A (en) * | 2012-07-23 | 2012-10-24 | 中国石油大学(华东) | Compound vibrating well-drilling tool |
-
2013
- 2013-03-22 CN CN201310095502.2A patent/CN103174791B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1125353A1 (en) * | 1983-01-10 | 1984-11-23 | Волгоградский государственный научно-исследовательский и проектный институт нефтяной промышленности | Above-bit shock absorber |
| SU1633087A1 (en) * | 1988-06-14 | 1991-03-07 | Ивано-Франковский Институт Нефти И Газа | Oscillator |
| US20090266612A1 (en) * | 2008-04-29 | 2009-10-29 | Smith International, Inc. | Vibrating downhole tool |
| CN102733756A (en) * | 2012-07-23 | 2012-10-17 | 中国石油大学(华东) | Vibration and pressure well drilling tool |
| CN102747958A (en) * | 2012-07-23 | 2012-10-24 | 中国石油大学(华东) | Compound vibrating well-drilling tool |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405287A (en) * | 2014-10-19 | 2015-03-11 | 长江大学 | Dual-pulse hydraulic oscillator for well drilling |
| CN105178860A (en) * | 2015-09-09 | 2015-12-23 | 长江大学 | Torsional pendulum oscillator |
| CN105178860B (en) * | 2015-09-09 | 2017-05-10 | 长江大学 | Torsional pendulum oscillator |
| CN111864978A (en) * | 2020-07-29 | 2020-10-30 | 吉林大学 | Pressure-resistant columnar linear vibrator for holes |
| CN111864978B (en) * | 2020-07-29 | 2022-12-27 | 吉林大学 | Pressure-resistant columnar linear vibrator for holes |
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| Publication number | Publication date |
|---|---|
| CN103174791B (en) | 2015-03-11 |
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