CN202810656U - Double rotational-speed device controlling bit pressure distribution relation of reaming while drilling - Google Patents
Double rotational-speed device controlling bit pressure distribution relation of reaming while drilling Download PDFInfo
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- CN202810656U CN202810656U CN 201220209756 CN201220209756U CN202810656U CN 202810656 U CN202810656 U CN 202810656U CN 201220209756 CN201220209756 CN 201220209756 CN 201220209756 U CN201220209756 U CN 201220209756U CN 202810656 U CN202810656 U CN 202810656U
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Abstract
The utility model discloses a double rotational-speed device controlling the bit pressure distribution relation of reaming while drilling. The device includes a while drilling reamer, a fluid motor and a pilot hole drill stem, wherein a measure and control device is arranged inside the pilot hole drill stem, and includes an electromagnetic valve, a bit pressure detector and a microprocessor; the microprocessor is electrically connected with the electromagnetic valve and the bit pressure detector, and is used for controlling and monitoring the bit pressure borne by the pilot hole drill stem in a real-time manner; and a bit pressure comparison module in the microprocessor is used for comparing a preset bit pressure threshold value with a bit pressure of the drill stem to-be-tested, and the opening degree of the electromagnetic valve is adjusted and controlled through a command of an electromagnetic valve control module of the microprocessor when the bit pressure of the drill stem to-be-tested is bigger than the preset bit pressure threshold value. The device can be used for controlling the bit pressure in a real-time manner, rationally distributes the bit pressure between the reamer and the pilot hole drill bit, and guarantees the safety and stability during reaming.
Description
Technical field
The utility model relates to a kind of special downhole tool that oil and gas well drilling is used, be particularly related to a kind of control with two rotational speed devices of boring reaming hole the pressure of the drill relations of distribution, be used for the relations of distribution of the pressure of the drill between drill-following reamer and pilot bit that control applies with brill reaming hole process ground.
Background technology
In recent years, being applied to passing through expansive stratum, optimizing casing program with boring the reaming hole technology in the oil/gas drilling field improves the aspects such as cementing quality, changes the indispensable measure of active applications into from traditional acute measure of answering gradually.In the Special complex zone, the reaming hole technology merges mutually with other drilling technology, formed the new technology of the bright characteristics such as casing drilling, the drilling well of guiding reaming hole, single diameter drilling well, and the design and use of hole reaming tool is subject to also paying attention to more and more widely.
With boring in the reaming hole process, be cascaded as pilot bit and the drill-following reamer interrelation of one, be in different well bore positions, different external force is born in the rock stratum that cutting is not quite similar, and but needs to keep to be close to consistent rate of penetration.In fact, the instantaneous rate of penetration of the two often is difficult to keep identical, and influence factor mainly contains the staggered of stratum, the variation of drilling tool cutting power, the variation of drilling technology parameter etc.As example, might as well consider the pressure of the drill distribution condition when boring the reaming hole device and pierce the staggered stratum of soft or hard.Suppose by hard formation and enter soft formation, then pilot bit at first contacts and holds breakable soft formation, and reamer also is in difficult broken hard formation, temporal ROP when pilot bit enters soft formation so increases suddenly, and the pressure of the drill that is applied to it reduces rapidly, and the part the pressure of the drill that reduces will be transferred on the reamer at once.And when entering hard formation by soft formation, situation is just the opposite, and the instantaneous the pressure of the drill that acts on pilot bit will increase rapidly.Can find that so for pilot bit, when its temporal ROP is higher than reamer, the pressure of the drill that acts on it will reduce; When its temporal ROP is lower than reamer, the pressure of the drill that acts on it will increase.
The researcher points out that the reaming hole process is usually followed the bad working environments such as stick-slip, vibration, and one of reason that causes this phenomenon is the unreasonable distribution of the pressure of the drill between reamer and pilot bit.In fact, in the design process of reaming hole device, just should provide the reference value that the pressure of the drill distributes.Calculating the conventional method that the pressure of the drill distributes is the geometric area method, is about to the ratio that reamer and the cross-sectional area of pilot bit excision rock are compared to the two suffered the pressure of the drill.It is single that this method relates to factor, and the degree of accuracy is lower.
Xia Yan is considered as the borehole wall to be subjected to the thick cylinder of interior external pressure, analyzed the compressive strength difference on drill bit and stratum that reamer cuts, the calculating that has proposed to characterize the alias index of above-mentioned difference and be introduced into the pressure of the drill distribution ratio, but this method hypothesis reamer is identical with the power of pilot bit rock cutting, and the adaptation field is narrower.
Thereby the people such as Thomson proposition is rationally controlled the method for the pressure of the drill distribution by the cloth toothing of adjusting pilot bit and drill-following reamer and is tested.Yet this method is not suitable for stratum complicated and changeable, in case and after the cutting teeth wearing and tearing its cutting power also change, this amplitude of variation is difficult to estimate, so be difficult to guarantee the reasonable distribution of the pressure of the drill in the reaming hole process.
Up to now, there is no rational scheme can be with boring the stable the pressure of the drill relations of distribution that keep in the reaming hole process between reamer and the pilot bit.
The utility model content
In order to realize the reasonable distribution of the pressure of the drill between reamer and pilot bit, guarantee the safety and stablization of reaming hole process, the utility model provides a kind of control with two rotational speed devices of boring reaming hole the pressure of the drill relations of distribution.
Described technical scheme is as follows:
A kind of control is with two rotational speed devices of boring reaming hole the pressure of the drill relations of distribution, comprise drill-following reamer and neck eye drill string, be provided with fluid motor and pilot bit in the described neck eye drill string, described pilot bit is connected with described fluid motor, be used for driving described pilot bit rotation, it is characterized in that also be provided with measure and control device in the described neck eye drill string, described measure and control device comprises:
Electromagnetic valve is arranged in the cylinder of described neck eye drill string, and its import is communicated with by the cavity of poroid runner with described neck eye drill string, and its outlet is communicated with bore hole annulus by side nozzle;
The pressure of the drill detector is sealed in the cylinder of described neck eye drill string, is used for detecting in real time the pressure of the drill of described neck eye drill string;
Microprocessor is sealed in the cylinder of neck eye drill string, and is connected with the pressure of the drill detector with described electromagnetic valve respectively, is used for controlling the duty of described the pressure of the drill detector and the opening degree of electromagnetic valve;
Battery is sealed in the cylinder of neck eye drill string, is described the pressure of the drill detector, microprocessor and solenoid valve;
Described microprocessor operation has the pressure of the drill presetting module, the pressure of the drill comparison module and solenoid control module,
The pressure of the drill presetting module, the default threshold limit value of the pressure of the drill that is used for storing described neck eye drill string;
The pressure of the drill comparison module is used for the size that relatively institute's the pressure of the drill of surveying and the pressure of the drill are preset threshold limit value;
The solenoid control module receives the signal of described the pressure of the drill comparison module, and adjusts the aperture of described electromagnetic valve according to comparison signal.
Wherein, the default the pressure of the drill threshold limit value of described the pressure of the drill presetting module is 50%～70% of total the pressure of the drill, and described total the pressure of the drill is drill-following reamer and the pressure of the drill sum of leading the eye drill string to bear.
Further, described device also comprises the observing and controlling pipe nipple of a hollow, and described measure and control device is arranged in the described observing and controlling pipe nipple, and the two ends of described observing and controlling pipe nipple are connected with fluid motor with described drill-following reamer respectively.
Described pilot bit is PDC drill bit, rock bit or combination tooth drill bit; Described drill-following reamer is installed the PDC cutting teeth.
Described fluid motor is screw motor or turbine motor, and its rotor speed is by the mud flow rate size control of flowing through wherein.
The beneficial effect of the technical scheme that the utility model embodiment provides is:
(1) by the pressure of the drill data on the in real time detection of the pressure of the drill detector and the record pilot bit drill string, is convenient to analyze and creeps into dynamic process; By the pressure of the drill comparison module in the microprocessor the pressure of the drill measured value, the default threshold limit value of the pressure of the drill are compared, when the pressure of the drill measured value exceeds the default threshold limit value of the pressure of the drill, by the flow through rotating speed of mud flow rate control pilot bit of fluid motor of adjustment, and then realize that the pressure of the drill between drill-following reamer and the neck eye drill string distributes, the pressure of the drill is distributed control in the reasonable scope, thereby realize more stable, safe reaming hole drilling process, improve tool life, save drilling cost.
(2) the utility model only need be matched suitable joint, this device can be used for various types of with boring the reaming hole device.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that the control that proposes of the utility model is with the device that bores reaming hole the pressure of the drill relations of distribution;
Fig. 2 is drill-following reamer and observing and controlling pipe nipple structure sectional view among Fig. 1;
Fig. 3 is pilot bit and the fluid motor structure sectional view among Fig. 1;
Fig. 4 is the observing and controlling pipe nipple structural representation among Fig. 1;
Fig. 5 is measure and control device control principle block diagram.
Among the figure:
1. drill-following reamer, 2. observing and controlling pipe nipple, 3. fluid motor, 4. pilot bit, 5. reamer inner flow passage,
6. observing and controlling pipe nipple inner flow passage, 7. fluid motor rotor, 8. universal joint, 9. side nozzle, 10. electromagnetic valve,
11. microprocessor, 12. batteries, 13. electromagnetic valve imports, 14. neck eye drill strings.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model embodiment is described in further detail.
The utility model provides a kind of two rotating speed methods with boring reaming hole the pressure of the drill relations of distribution, and described method comprises:
The pressure of the drill value to neck eye drill string 14 is measured in real time, obtains the pressure of the drill measured value of neck eye drill string 14; Compare the pressure of the drill measured value and neck eye drill string 14 the pressure of the drill threshold limit values of presetting; If the pressure of the drill measured value exceeds default threshold limit value, by the adjustment rotating speed of mud flow rate control pilot bit of fluid motor of flowing through, and then control its rate of penetration, and change the pressure of the drill relations of distribution.
The threshold limit value of wherein said pilot bit the pressure of the drill is 50%～70% of total the pressure of the drill, and described total the pressure of the drill is the pressure of the drill sum that drill-following reamer and pilot bit bear.
When the pressure of the drill measured value of pilot bit exceeds the threshold limit value that sets, the drilling speed of pilot bit is controlled, specifically comprise:
When the pressure of the drill measured value be higher than total the pressure of the drill 70% the time, improve the rotating speed of pilot bit by the flow through mud flow rate of fluid motor of increase;
When the pressure of the drill measured value be lower than total the pressure of the drill 50% the time, reduce the rotating speed of pilot bit by the flow through mud flow rate of fluid motor of minimizing.
See also Fig. 1～Fig. 4, the utility model also provides a kind of control with two rotational speed devices of boring reaming hole the pressure of the drill relations of distribution, comprise drill-following reamer 1, fluid motor 3, neck eye drill string 14 and observing and controlling pipe nipple 2, also can observing and controlling pipe nipple 2 is as a whole with neck eye drill string 14, preferably observing and controlling pipe nipple 2 is separated, drill-following reamer 1 is driven by ground drill; Described pilot bit 4 is connected with described fluid motor 3, be used for driving described pilot bit 4 rotations, observing and controlling pipe nipple 2 is for detection of the size of neck eye drill string 14 the pressure of the drill and the rotating speed of control below fluid motor 3, and fluid motor rotor 7 links to each other with pilot bit 4 by universal joint 8.Observing and controlling pipe nipple 2 upper and lowers all are processed with joint, and top connects drill-following reamer 1 during installation, and the bottom connects fluid motor 3 and gets final product, and reamer inner flow passage 5, observing and controlling pipe nipple inner flow passage 6 and neck eye drill string 14 are connected.Observing and controlling pipe nipple 2 wherein is embedded with measure and control device, and measure and control device comprises:
The pressure of the drill detector is sealed in the cylinder of observing and controlling pipe nipple 2, is used for detecting in real time the pressure of the drill of neck eye drill string;
Described microprocessor 11 operations have the pressure of the drill presetting module, the pressure of the drill comparison module and solenoid control module,
The pressure of the drill presetting module, the default the pressure of the drill threshold limit value that is used for storing described neck eye drill string 14;
The pressure of the drill comparison module is used for institute's the pressure of the drill of surveying relatively and the size of the pressure of the drill threshold limit value of presetting;
The solenoid control module is used for receiving the signal of described the pressure of the drill comparison module, and adjusts the aperture of described electromagnetic valve according to comparison signal, realizes the pressure of the drill reasonable distribution.Bore threshold limit value if the pressure of the drill of surveying exceeds the neck eye that sets, control the rotating speed of pilot bit 4 by the aperture of adjusting described electromagnetic valve 10, realize the pressure of the drill reasonable distribution.
Above-mentioned pilot bit 4 can be selected PDC drill bit, rock bit or combination tooth drill bit; Drill-following reamer adopts the PDC cutting teeth, and fluid motor can be selected screw motor of the prior art or turbine motor, and its rotor speed is by the mud flow rate size control of flowing through wherein.
This device be exclusively used in complex region with boring the reaming hole operation.Before operation begins, with slow turn on pump after at the bottom of the instrument lower going-into-well, fully circulate 1～2 time to guarantee the shaft bottom cleaning.Apply gradually afterwards the pressure of the drill, keep drill-following reamer rotational speed omega 1 about 50～60rpm.In case observing and controlling pipe nipple 2 detects the pressure of the drill signal, electromagnetic valve is namely opened, and adjusts the flow of the fluid motor of flowing through, and makes drill speed reach the ω 2 of design, guarantees that the pressure of the drill relations of distribution reach scope of design.Generally should guarantee to lead a drill string 14 the pressure of the drill of bearing to reach the 50%-70% of total the pressure of the drill.Before the reaming hole operation begins, should under zero the pressure of the drill condition, strengthen gradually the pump amount, reamer is opened fully; Strengthen afterwards the pressure of the drill, enter the reaming hole stage, keep the pressure of the drill and ground pump delivery, until reaming hole is ended.
Observing and controlling pipe nipple 2 is installed on drill-following reamer 1 bottom, and fluid motor 3 tops are by battery 12 power supplies.In the whole reaming hole drilling process, electromagnetic valve 10 remains opening, also be that partial discharge enters electromagnetic valve 10 through observing and controlling pipe nipple 2 inner flow passages 6 by electromagnetic valve import 13, and directly enter annular space by runner by side nozzle 9, and without pilot bit 4.Microprocessor 11 control the pressure of the drill detectors are measured the pressure of the drill value that acts on neck eye drill string 14 in real time; When measured value is lower than threshold limit value, microprocessor will make the electromagnetic valve aperture increase, then nozzle flow increases, and the flow of the fluid motor of flowing through reduces, the pilot bit rotating speed decreases, thereby limited the instantaneous rate of penetration of pilot bit, the pressure of the drill that is applied to it increases, thereby the pressure of the drill distribution is maintained in the rational scope.
Its concrete control principle as shown in Figure 5, record the pressure of the drill of neck eye drill string when the pressure of the drill detector, set the threshold limit value of the pressure of the drill by the pressure of the drill presetting module in the microprocessor, comparison module in the microprocessor receives the pressure of the drill detector and surveys the pressure of the drill signal, and by comparing the numerical values recited of the pressure of the drill measured value and default threshold limit value, when survey the pressure of the drill value exceeds the scope of default threshold limit value, carry out the large little trick of adjustment aperture by solenoid control module controls electromagnetic valve, specifically adjustment mode comprises following two kinds of situations:
When survey the pressure of the drill value is higher than threshold limit value, the solenoid control module is sent to electromagnetic valve with command signal, electromagnetic valve 10 apertures are turned down, the flow of fluid motor 3 of flowing through increases, drill speed increases thereupon, thereby increase the instantaneous rate of penetration of drill bit, the pressure of the drill that reduces to be applied to it has been adjusted the pressure of the drill relations of distribution;
When survey the pressure of the drill value is lower than threshold limit value, the solenoid control module is sent to electromagnetic valve with command signal, electromagnetic valve 10 apertures are tuned up, the flow of fluid motor 3 of flowing through reduces, drill speed reduces thereupon, thereby reduced the instantaneous rate of penetration of drill bit, increased the pressure of the drill that is applied to it, adjusted the pressure of the drill relations of distribution.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. a control is with two rotational speed devices of boring reaming hole the pressure of the drill relations of distribution, comprise drill-following reamer and neck eye drill string, be provided with fluid motor and pilot bit in the described neck eye drill string, described pilot bit is connected with described fluid motor, be used for driving described pilot bit rotation, it is characterized in that also be provided with measure and control device in the described neck eye drill string, described measure and control device comprises:
Electromagnetic valve is arranged in the cylinder of described neck eye drill string, and its import is communicated with by the cavity of poroid runner with described neck eye drill string, and its outlet is communicated with bore hole annulus by side nozzle;
The pressure of the drill detector is sealed in the cylinder of described neck eye drill string, is used for detecting in real time the pressure of the drill of described neck eye drill string;
Microprocessor is sealed in the cylinder of neck eye drill string, and is connected with the pressure of the drill detector with described electromagnetic valve respectively, is used for controlling the duty of described the pressure of the drill detector and the opening degree of electromagnetic valve;
Battery is sealed in the cylinder of neck eye drill string, is described the pressure of the drill detector, microprocessor and solenoid valve;
Described microprocessor operation has the pressure of the drill presetting module, the pressure of the drill comparison module and solenoid control module,
The pressure of the drill presetting module, the default threshold limit value of the pressure of the drill that is used for storing described neck eye drill string;
The pressure of the drill comparison module is used for the size that relatively institute's the pressure of the drill of surveying and the pressure of the drill are preset threshold limit value;
The solenoid control module receives the signal of described the pressure of the drill comparison module, and adjusts the aperture of described electromagnetic valve according to comparison signal.
2. control according to claim 1 is characterized in that with two rotational speed devices of boring reaming hole the pressure of the drill relations of distribution,
The default the pressure of the drill threshold limit value of described the pressure of the drill presetting module is 50%～70% of total the pressure of the drill, and described total the pressure of the drill is drill-following reamer and the pressure of the drill sum of leading the eye drill string to bear.
3. control according to claim 1 is characterized in that with two rotational speed devices of boring reaming hole the pressure of the drill relations of distribution,
Described device also comprises the observing and controlling pipe nipple of a hollow, and described measure and control device is arranged in the described observing and controlling pipe nipple, and the two ends of described observing and controlling pipe nipple are connected with fluid motor with described drill-following reamer respectively.
4. arbitrary described control is characterized in that with two rotational speed devices of boring reaming hole the pressure of the drill relations of distribution according to claim 1-3,
Described pilot bit is PDC drill bit, rock bit or combination tooth drill bit;
Described drill-following reamer is installed the PDC cutting teeth.
5. control according to claim 4 is characterized in that with two rotational speed devices of boring reaming hole the pressure of the drill relations of distribution,
Described fluid motor is screw motor or turbine motor, and its rotor speed is by the mud flow rate size control of flowing through wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220209756 CN202810656U (en) | 2012-05-10 | 2012-05-10 | Double rotational-speed device controlling bit pressure distribution relation of reaming while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220209756 CN202810656U (en) | 2012-05-10 | 2012-05-10 | Double rotational-speed device controlling bit pressure distribution relation of reaming while drilling |
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| CN202810656U true CN202810656U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220209756 Withdrawn - After Issue CN202810656U (en) | 2012-05-10 | 2012-05-10 | Double rotational-speed device controlling bit pressure distribution relation of reaming while drilling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388453A (en) * | 2012-05-10 | 2013-11-13 | 中国石油天然气集团公司 | Double rotation speed method and device for controlling reaming-while-drilling bit pressure distribution relation |
| CN103410446A (en) * | 2013-08-20 | 2013-11-27 | 中国海洋石油总公司 | Reaming inclinometry way-type drilling unit |
| CN104120975A (en) * | 2013-04-28 | 2014-10-29 | 中国石油天然气集团公司 | Reaming while drilling tool assembly and well drilling machine |
-
2012
- 2012-05-10 CN CN 201220209756 patent/CN202810656U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388453A (en) * | 2012-05-10 | 2013-11-13 | 中国石油天然气集团公司 | Double rotation speed method and device for controlling reaming-while-drilling bit pressure distribution relation |
| CN103388453B (en) * | 2012-05-10 | 2015-11-18 | 中国石油天然气集团公司 | Control two rotating speed method and the device of reaming-while-drillibit bit pressure distribution relation |
| CN104120975A (en) * | 2013-04-28 | 2014-10-29 | 中国石油天然气集团公司 | Reaming while drilling tool assembly and well drilling machine |
| CN103410446A (en) * | 2013-08-20 | 2013-11-27 | 中国海洋石油总公司 | Reaming inclinometry way-type drilling unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130320 Effective date of abandoning: 20151118 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |