CN101655004B - Sleeve compensator special for thermal production well - Google Patents
Sleeve compensator special for thermal production well Download PDFInfo
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- CN101655004B CN101655004B CN2009100177922A CN200910017792A CN101655004B CN 101655004 B CN101655004 B CN 101655004B CN 2009100177922 A CN2009100177922 A CN 2009100177922A CN 200910017792 A CN200910017792 A CN 200910017792A CN 101655004 B CN101655004 B CN 101655004B
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- sleeve
- production well
- thermal production
- central tube
- external splines
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Abstract
The invention discloses a sleeve compensator special for a thermal production well in petroleum industry. The sleeve compensator is connected in the tubular column of the sleeve of a thick oil thermal production well so as to provide effective compensation for the extension of the tubular column of the sleeve of the thermal production well which is caused by steam injection technology or the contraction of the tubular column which is caused by carbon dioxide injection and other measures and prevent the deformation damage of the sleeve caused by the extension or contraction. The sleeve compensator comprises an outer barrel and a central tube, the outer barrel is connected with a boot cap, the central tube is connected with the outer barrel through splines, a locking mechanism is arranged between the outer barrel and the central tube. The sleeve compensator of the invention has stable operation, simple structure, short tool length, low cost and long compensation distance, is applicable to the design of various thermal production well completion technologies, can be placed to any desired place and can not be affected by inclination. The sleeve compensator can ensure that when performing the steam injection of thick oil thermal production well, the completion string can be intact and not be damaged owning to the temperature change; no successive activity is needed to do after the construction and the inner drift diameter of the well is kept the same after well completion, thus providing good conditions for successive activity and construction.
Description
Technical field
The present invention relates to the downhole tool of petroleum industry thick oil thermal extraction, sleeve compensator special for thermal production well particularly, be connected in the sleeve pipe tubing string of thick oil thermal extraction, the elongation that the sleeve pipe tubing string of thermal production well is caused because of steam injection technology, or the tubing string that causes of measure such as carbon dioxide injection shrinks effective compensation is provided, and prevents that sleeve pipe is because of elongation or contraction deformed damaged.
Background technology
Existing thermal production well sleeve compensator is mainly by upper and lower section sleeve compensator, instlated tubular, and interior pipe, potted component, the upper and lower composition such as plug that compresses, its principle is similar substantially, mostly is to control sleeve compensator by mechanical shear pin when to start working.This type of sleeve compensator mainly contains two kinds of defectives that can't overcome on principle, a kind of is to adorn a small amount of shear pin, can damage the anterior cannula expansion loop at sleeve pipe so just starts working, improve the safety factor of sleeve pipe in the down-hole, but this situation has increased the difficulty of practice of construction, does not note slightly in being lowered to process, and shear pin is just cut off easily in advance, cause complementary range to be taken in advance, lose its compensating action; Another kind of situation is many dress shear pins, improves the safety of sleeve compensator in work progress, but this situation easily causes sleeve compensator work anterior cannula just to damage again.Two kinds of mutual contradictions of situation are difficult to select rational shear pin number.In addition, the present internal construction more complicated of sleeve compensator commonly used, part is many tens few tens, easily have problems during practical application at the scene.Simultaneously, existing sleeve compensator can only compensate to casing expandable is extended by folk prescription, can not shrink sleeve pipe and realize compensation, can't realize bidirectional compensating.Therefore, can have the thermal production well sleeve compensator and have following a few point defect: 1, there is contradiction in operating principle, causes the probability of sleeve compensator energy operate as normal very little; 2, can only realize the elongation that the sleeve pipe expanded by heating causes is compensated, can not the casing string contraction that cause as carbon dioxide injection technology be compensated; 3, individual tool length is longer, is lowered to as need that a plurality of then to occupy oil layer section oversize, the cost of increasing input; 4, complex structure is prone to fault when using in the down-hole; 5, be applicable to conventional thermal production well, be not suitable for complicated well-completing process such as horizontal well thermal recovery.
Sleeve compensator is most important in the thermal production well activities, if thermal production well damages at work progress middle sleeve post, expends hundreds of thousands unit at least, expends millions of units and even several ten million yuan at most.Therefore be badly in need of the safety factor that reliable instrument improves whole tubing string.
Summary of the invention
The sleeve compensator special for thermal production well that the purpose of this invention is to provide a kind of simple in structure, reliable operation is fit to the design of the various well-completing process of thermal production well, the shortcoming or the deficiency that overcome effectively or avoid above-mentioned prior art to exist.
The object of the present invention is achieved like this: sleeve compensator special for thermal production well comprises urceolus and central tube, and urceolus is connected with end cap, and central tube is connected by spline with urceolus, also is provided with locking mechanism between urceolus and central tube.Locking mechanism has guaranteed that the functional reliability of time well construction, interior external splines have guaranteed the transmission and the complementary range of sleeve pipe moment of torsion.
The present invention compares with existing similar tools has following obvious improvement and effect:
1, the present invention can carry out bidirectional compensating, can either compensate because of the elongation that expanded by heating causes sleeve pipe, can shrink the sleeve pipe that causes because of technological measures such as carbon dioxide injections again to compensate, and makes down-hole casing safer.
2, the present invention uses hot melt material and lock dog associating locked-center pipe, guarantees that central tube does not slide in the process of going into the well, and complementary range is not taken in advance, and construction safety is convenient.
3, reliable operation, simple in structure, tool length is short, and cost is low, and complementary range is long.Under the condition of occupying equal oil reservoir length, can be lowered to a plurality of instruments, be placed on the dangerous well section in many places, reduced tubing string effectively and caused the danger that STRESS VARIATION causes sleeve pipe to damage because of variations in temperature.
4, the present invention is applicable to the design of various thermal production well well-completing process, can be placed on any desired position, is not subjected to the influence of hole deviation angle, and completion tubular column is intact, not impaired because of variations in temperature when guaranteeing the operation of thick oil thermal extraction notes vapour.
5, simplify working process without any need for the subsequent job measure in the construction back, the reduction of erection time, reduce production costs, and the interior latus rectum of well is consistent after the completion, for the subsequent job construction provides good condition.
6, use the present invention can guarantee the safety of completion tubular column, significantly reduced Master Cost and job execution expense, remarkable in economical benefits.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further detailed description: referring to accompanying drawing, sleeve compensator special for thermal production well comprises urceolus 1 and central tube 2, and urceolus 1 is connected with end cap 3, central tube 2 and urceolus 1 are connected by spline, also are provided with locking mechanism between urceolus 1 and central tube 2.Urceolus 1 inner chamber top is that limited step, middle part are provided with internal spline and are connected with end cap 3 with annular lock groove, inner chamber bottom, and locking mechanism is filled in the annular lock groove, and the groove depth of this annular lock groove is greater than the tooth root of internal spline.Locking mechanism comprises lock dog 4 and hot melt material, and lock dog 4 and hot melt material are filled in the annular lock groove of urceolus 1 at interval.Hot melt material is the metal fever melt material, and this hot melt material is selected the low-melting alloy hot melt material that melting temperature can be set according to the practical application well depth for use, and its melting temperature can be determined according to practical application well depth situation.Can regulate the fusing point of alloy by adjusting the content of heterogeneity in the alloy, adapt to different well depth situations with this, and compare with other hot melt material that to have processing simple, fusing point is adjustable and the fusing window narrows, and hardness is than advantages such as height before the fusing.The internal diameter and the casing inner diameter of central tube 2 are equal to, the external splines of cylindrical design at an upper portion thereof.The facewidth of central tube 2 external splines hypomeres becomes with the different wide external splines of tooth from a side arc constriction greater than the facewidth of epimere, and the structure at this arc constriction place conforms to the inner edge structure of lock dog 4.Come the axial compression direction of locked-center pipe 2 to move by central tube 2 hypomere external splines, but the motion of the draw direction of not spacing central tube 2, the motion of axial compression direction is the opposite motion of both direction with the draw direction motion.The length of central tube 2 epimere external splines, but the length that is narrow tooth section is the complementary range of this instrument when sleeve pipe shrinks, the length of hypomere external splines, but the length that is wide tooth section is the complementary range of this instrument when the horizontal well middle sleeve expands elongation, the length of whole section external splines is the complementary range in the straight well, the arc constriction place of its epimere external splines and hypomere external splines be locking mechanism to the spacing place of the elongation of elongation compensate distance, the arc constriction place of every external splines all cooperates a lock dog 4.The upper end of end cap 3 is spacing places of contraction of this instrument shrinkage-compensating distance.The external splines of central tube 2 cooperates with the internal spline of urceolus 1, limits the twisting between central tube 2 and the urceolus 1, and comes transfer torque with this.
During concrete the use, the present invention is connected thermal production well to go in the sleeve pipe tubing string of well, be lowered in the process when the straight well section, the locking mechanism at this instrument of being in middle part is a lock-out state, be that hot melt material is solid-state, central tube 2 can not take the sleeve pipe complementary range in when elongation, but owing to gravity reason central tube 2 is stretched to the upper end of end cap 3 by the bottom tubing string, the initial stage can take the shrinkage-compensating distance.When being lowered into horizontal segment during tubing string puts in place, because the effect of the suffered frictional force of bottom tubing string, the central tube 2 of this instrument of making is in normal operating conditions, but promptly central tube 2 is in the bidirectional compensating state, and just the arc constriction place of central tube 2 external splines is corresponding with locking mechanism.Take first carbon dioxide injection after steam injection technology measure as arts demand this moment, this instrument can be realized earlier the sleeve pipe that is caused by carbon dioxide injection being shunk compensating, hot melt material fusing when the steam injection, the locking mechanism release, discharged lock dog 4, again the sleeve pipe elongation that causes because of notes vapour has been compensated; As the then locking mechanism directly release at high temperature of this instrument of direct steam injection, elongation compensates to sleeve pipe.
Claims (5)
1. sleeve compensator special for thermal production well comprises urceolus (1) and central tube (2), it is characterized in that urceolus (1) is connected with end cap (3), and central tube (2) is connected by spline with urceolus (1), also is provided with locking mechanism between urceolus (1) and central tube (2); Urceolus (1) inner chamber top is that limited step, middle part are provided with internal spline and are connected with end cap (3) with annular lock groove, inner chamber bottom, and locking mechanism is filled in the annular lock groove; Locking mechanism comprises lock dog (4) and hot melt material, and lock dog (4) and hot melt material are filled in the annular lock groove of urceolus (1) at interval; The internal diameter and the casing inner diameter of central tube (2) are equal to, its top cylindrical design external splines, the facewidth of its external splines hypomere becomes with the different wide external splines of tooth from a side arc constriction greater than the facewidth of epimere, and the structure at this arc constriction place conforms to the inner edge structure of lock dog (4).
2. sleeve compensator special for thermal production well according to claim 1 is characterized in that hot melt material is the metal fever melt material.
3. sleeve compensator special for thermal production well according to claim 1 and 2 is characterized in that hot melt material is the low-melting alloy hot melt material, and its melting temperature can be determined according to practical application well depth situation.
4. sleeve compensator special for thermal production well according to claim 1 is characterized in that the tooth root of the groove depth of urceolus (1) annular lock groove greater than internal spline.
5. sleeve compensator special for thermal production well according to claim 1, it is characterized in that central tube (2) but the length of epimere external splines is the complementary range of this sleeve compensator when sleeve pipe shrinks, but the length of hypomere external splines is the complementary range of this sleeve compensator when the horizontal well middle sleeve expands elongation, the length of whole section external splines is the complementary range in the straight well, the arc constriction place of its epimere external splines and hypomere external splines be locking mechanism to the spacing place of the elongation of elongation compensate distance, the arc constriction place of every external splines all cooperates a lock dog (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100177922A CN101655004B (en) | 2009-08-28 | 2009-08-28 | Sleeve compensator special for thermal production well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100177922A CN101655004B (en) | 2009-08-28 | 2009-08-28 | Sleeve compensator special for thermal production well |
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| Publication Number | Publication Date |
|---|---|
| CN101655004A CN101655004A (en) | 2010-02-24 |
| CN101655004B true CN101655004B (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100177922A Active CN101655004B (en) | 2009-08-28 | 2009-08-28 | Sleeve compensator special for thermal production well |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438317B (en) * | 2013-09-08 | 2015-04-22 | 赵铎 | Steam pipeline compensator |
| CN103790549B (en) * | 2014-02-12 | 2016-09-07 | 中国石油化工股份有限公司 | A kind of horizontal well thermal recovery completion tubular column with omnidirectional's self-compensating function |
| CN106194045B (en) * | 2016-09-21 | 2019-01-18 | 库尔勒施得石油技术服务有限公司 | Drilling rod |
| CN109899003A (en) * | 2017-11-27 | 2019-06-18 | 中石化石油工程技术服务有限公司 | Hot melten type casing thermal stress autocompensation installation |
| CN110700765A (en) * | 2019-11-04 | 2020-01-17 | 长江大学 | Hot-melting type sleeve heat stress compensation device |
| CN114135263B (en) * | 2021-12-22 | 2023-08-04 | 南通永大管业股份有限公司 | Casing sealing connection device for thermal production well |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4040649A (en) * | 1975-10-31 | 1977-08-09 | Dresser Industries, Inc. | Oil well tool with packing means |
| CN1121979A (en) * | 1994-05-09 | 1996-05-08 | 王春然 | Supercharged hydraulic drilling tool |
| CN2622377Y (en) * | 2003-05-23 | 2004-06-30 | 辽河石油勘探局工程技术研究院 | Contact real type thermal stress compensator |
| CN2685563Y (en) * | 2004-02-26 | 2005-03-16 | 王作盛 | Heat producing well sleeve protector |
| CN2690562Y (en) * | 2004-04-10 | 2005-04-06 | 辽河石油勘探局 | Casing extending compensator with prestress device |
| CN201262046Y (en) * | 2008-09-26 | 2009-06-24 | 山东新大通石油环保科技股份有限公司 | Down-hole column jacket expansion device |
-
2009
- 2009-08-28 CN CN2009100177922A patent/CN101655004B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4040649A (en) * | 1975-10-31 | 1977-08-09 | Dresser Industries, Inc. | Oil well tool with packing means |
| CN1121979A (en) * | 1994-05-09 | 1996-05-08 | 王春然 | Supercharged hydraulic drilling tool |
| CN2622377Y (en) * | 2003-05-23 | 2004-06-30 | 辽河石油勘探局工程技术研究院 | Contact real type thermal stress compensator |
| CN2685563Y (en) * | 2004-02-26 | 2005-03-16 | 王作盛 | Heat producing well sleeve protector |
| CN2690562Y (en) * | 2004-04-10 | 2005-04-06 | 辽河石油勘探局 | Casing extending compensator with prestress device |
| CN201262046Y (en) * | 2008-09-26 | 2009-06-24 | 山东新大通石油环保科技股份有限公司 | Down-hole column jacket expansion device |
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| CN101655004A (en) | 2010-02-24 |
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