CN105275414A - Drill string heave compensation system - Google Patents
Drill string heave compensation system Download PDFInfo
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- CN105275414A CN105275414A CN201410254524.3A CN201410254524A CN105275414A CN 105275414 A CN105275414 A CN 105275414A CN 201410254524 A CN201410254524 A CN 201410254524A CN 105275414 A CN105275414 A CN 105275414A
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- drill string
- compensation
- active
- compensation system
- passive
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Abstract
A drill string heave compensation system comprises a drill string compensation device body, an active compensation controller, an energy accumulator (4), a main air valve, a pressure regulating valve (5), a compressor (6), an air storage tank and a compensation hydraulic station. The drill string heave compensation system can prevent an influence to drill string caused by movement of a ship body in waves and reduce a wearing between the drill string and a blowout preventer.
Description
Technical field
The present invention relates to a kind of ocean platform drill string heave compensator.
Background technology
Drill string heave compensator is as a key device of floating platform well system, and its Main Function intercepts hull to move on the impact of drill string under the wave action, reduces the wearing and tearing between drill string and preventer.Safe and reliable in order to operation.
Summary of the invention
The technical problem that the present invention solves provides a kind of drill string heave compensation system, safe and reliable in order to operation, and it can move on the impact of drill string at obstruct hull under the wave action, reduces the wearing and tearing between drill string and preventer.
The present invention is achieved by the following technical solutions:
A kind of drill string heave compensation system, comprises drill string compensator body, Active Compensation controller, accumulator, main air valve, pressure regulator valve, compressor, gasholder, compensation Hydraulic Station.
Active compensator described in the present invention comprises two cover Active Compensation fluid cylinders, Active Compensation control valve, Active Compensation Hydraulic Station set by described drill string compensator body.
Passive expansion loop described in the present invention comprises two cover passive compensation fluid cylinder, accumulator, main air valve, pressure regulator valve, compressor, gasholder, passive compensation Hydraulic Stations set by drill string compensator body.
Beneficial effect of the present invention:
The present invention can move on the impact of drill string at obstruct hull under the wave action, reduces the wearing and tearing between drill string and preventer.
Accompanying drawing explanation
Fig. 1 is system flow schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in the figure, a kind of drill string heave compensation system, comprises drill string compensator body, Active Compensation controller, accumulator 4, main air valve, pressure regulator valve 5, compressor 6, gasholder, compensation Hydraulic Station.
Active compensator in the present invention comprises two cover Active Compensation fluid cylinders 1 set by described drill string compensator body, Active Compensation control valve 3, Active Compensation Hydraulic Station 10.Active compensator, namely when ship floats, unnecessary fluid is reversed by hydraulic motor, the liquid of operational hydraulic cylinder is extracted out and enters epicoele, piston is increased to lifting force, with balanced oil and gas accumulator by compressed rear gas increase pressure, thus make in compensation arrangement fluid cylinder by the unlikely obvious increase of press liquid pressure); When foundering, automatically making operational hydraulic cylinder oil-filled (or fluid motor is rotated forward) to keep the pressure of fluid cylinder constant with variable pump, reaching and compensating drill string heave object.
In the present invention, passive expansion loop comprises two cover passive compensation fluid cylinder 2, accumulator 4, main air valve, pressure regulator valve 5, compressor 6, gasholder, passive compensation Hydraulic Stations 9 set by drill string compensator body.The operating principle of passive bucking-out system, compressor 6 is inflated to spare gas pot 7, and the different pressure regulator valves 5 carried according to hook are by the pressure of conversion adjustment work gasholder 8.When investigation vessel rises by wave or tidal action, the lifting force by ship stretches passive compensation fluid cylinder 9 piston, by the gas compression of accumulator 4 with storage power.When ship sinks by wave or tidal action, accumulator 4 releases energy, to compensate the heave of drill string.Namely the energy source of expansion loop work is in the heave of ship, therefore its consumption of power hardly.Passive compensation Hydraulic Station only damages to miss the season for liquid in system leak, operating process and carries out the effect of fluid infusion.In order to make compensation precision more accurate, while being provided with passive bucking-out system, be also provided with Active Compensation system.
Drill string heave compensation system can be considered and works under isothermal conditions, and namely the compression and expansion of gas slowly (having the enough heat radiation time) occurs, and when gas volume is compressed little one times, then the pressure of gas doubles, therefore volume and pressure are inverse relations.When compensating, in order to reduce the error of the balancing force change caused due to stroke change, the volume (some gas tanks in parallel) of accumulator gas fraction must be increased.But this inevitably causes the huge of equipment.Load variations error (the pressure of the drill change), when the gas tank of parallel connection is more, compensation arrangement operating pressure is higher, then load variations error is less, and its pressure of the drill error is generally ± and 3%-± 5%.
In order to make compensation precision more accurate, while being provided with passive bucking-out system, also Active Compensation system is provided with, so-called Active Compensation system, namely when ship floats, unnecessary fluid is reversed by hydraulic motor, the liquid of operational hydraulic cylinder is extracted out and enters epicoele, make piston increase to lifting force, with balanced oil and gas accumulator by compressed rear gas increase pressure, thus make in compensation arrangement fluid cylinder by the unlikely obvious increase of press liquid pressure); When foundering, automatically making operational hydraulic cylinder oil-filled (or fluid motor is rotated forward) to keep the pressure of fluid cylinder constant with variable pump, reaching and compensating drill string heave object.Namely the work of Active Compensation system is by power drive work, and consumed energy is comparatively large, but its load variations error (the pressure of the drill change) produced, and active the pressure of the drill error can reduce to ± and 0.5% or less.
Claims (3)
1. a drill string heave compensation system, is characterized in that: comprise drill string compensator body, Active Compensation controller, accumulator (4), main air valve, pressure regulator valve (5), compressor (6), gasholder, compensation Hydraulic Station.
2. drill string heave compensation system according to claim 1, it is characterized in that: described active compensator comprises two covers Active Compensation fluid cylinder (1) set by described drill string compensator body, Active Compensation control valve (3), Active Compensation Hydraulic Station (10).
3. drill string heave compensation system according to claim 1, is characterized in that: described passive expansion loop comprise set by drill string compensator body two cover passive compensation fluid cylinder (2), accumulator (4), main air valve, pressure regulator valve (5), compressor (6), gasholder, passive compensation Hydraulic Station (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410254524.3A CN105275414A (en) | 2014-06-10 | 2014-06-10 | Drill string heave compensation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410254524.3A CN105275414A (en) | 2014-06-10 | 2014-06-10 | Drill string heave compensation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105275414A true CN105275414A (en) | 2016-01-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410254524.3A Pending CN105275414A (en) | 2014-06-10 | 2014-06-10 | Drill string heave compensation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105275414A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106744308A (en) * | 2017-02-27 | 2017-05-31 | 广州文冲船厂有限责任公司 | Wave compensating device |
| CN108035917A (en) * | 2017-12-12 | 2018-05-15 | 中国石油大学(华东) | A kind of liquid gas energy storage equipment isolating valve |
-
2014
- 2014-06-10 CN CN201410254524.3A patent/CN105275414A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106744308A (en) * | 2017-02-27 | 2017-05-31 | 广州文冲船厂有限责任公司 | Wave compensating device |
| CN108035917A (en) * | 2017-12-12 | 2018-05-15 | 中国石油大学(华东) | A kind of liquid gas energy storage equipment isolating valve |
| CN108035917B (en) * | 2017-12-12 | 2019-07-09 | 中国石油大学(华东) | A kind of liquid gas energy storage equipment isolating valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |
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| WD01 | Invention patent application deemed withdrawn after publication |