CN105370231A - Cutting method for tubular column in oil-gas well - Google Patents
Cutting method for tubular column in oil-gas well Download PDFInfo
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- CN105370231A CN105370231A CN201410419897.1A CN201410419897A CN105370231A CN 105370231 A CN105370231 A CN 105370231A CN 201410419897 A CN201410419897 A CN 201410419897A CN 105370231 A CN105370231 A CN 105370231A
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- cutting
- cutting blade
- tubing string
- predetermined cuts
- cuts position
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Abstract
The invention relates to a cutting method for a tubular column in an oil-gas well. The method comprises the following steps: conveying a cutting blade to a predetermined cutting position of the tubular column; defining the cutting blade at the predetermined cutting position through a support mechanism; driving the cutting blade to cut the tubular column at the predetermined cutting position; acquiring working condition information during cutting; and when the working condition information meets a preset stopping condition, stopping cutting. The cutting method for the tubular column, which is disclosed by the invention, has the advantages of being high in cutting efficiency and high in cutting accuracy.
Description
Technical field
The present invention relates to tubing string cutting technique, be specifically related to a kind of cutting method for Oil/gas Well tubing string.
Background technology
In oil drilling or well workover process, when tubing string in well buried or be stuck cannot take out time, often need measures such as taking back-off, wear away, even need directly to cut off tubing string at certain depth.
Present inventor is found by research, and current tubing string internal cutting mode mainly contains cumulative blasting, chemical cleavage, waterpower cutting etc.But these cutting modes all exist some defects, cumulative cuts and is mainly cut off by tubing string by the destruction of explosive blasting, and this cutting method explosive consumption is not easy to control, and accurate location difficulty, success rate is lower.Chemical cleavage mode is that tubing string cuts off by the chemical mordant utilizing the chemical agent in cutting tool to produce HTHP, and the sealing requirements of this cutting method to cutter sweep is higher, easily causes environment pollution, and cutting accuracy is difficult to control simultaneously.Waterpower cutting utilizes to pump into high-pressure fluid from ground and cut tubing string, and need large-scale ground construction equipment, nozzle easily damages simultaneously, and cutting accuracy can not be guaranteed, and cost is higher.
Therefore, the cutting method that a kind of cutting efficiency is high, cutting accuracy is high need be looked for become the current technical problem that should solve.
Summary of the invention
For the problems referred to above; the present invention proposes a kind of cutting method for Oil/gas Well tubing string; it can realize the isoparametric real-time monitoring of vibration to the depth of cut in cutting process and equipment; cutting efficiency and cutting accuracy can be promoted like this; simplify construction process simultaneously; reduce operating cost, cutting process safety and environmental protection, can available protecting reservoir.
The present invention proposes a kind of cutting method for Oil/gas Well tubing string, the method comprises predetermined cuts position cutting blade being sent to tubing string; By a supporting mechanism, cutting blade is limited to predetermined cuts position; Cutting blade is driven to cut tubing string in predetermined cuts position; Gather work information during cutting; When work information meets preset stopping condition, stop cutting.
According to tubing string cutting method of the present invention, cutting blade accurately can arrive the predetermined cuts position in tubing string and after cutting blade being limited to predetermined cuts position by a supporting mechanism, performing cutting action, this ensures that there the precision of cutting.In addition, by gathering the work information in cutting process, can realize the work information that gathers and the real-time matching of preset stopping condition, when the work information collected meets preset stopping condition, stop cutting, which further increases cutting accuracy.
In one embodiment, by the mode of conducting oneself with dignity or creep, cutting blade is sent to predetermined cuts position, take can adapt to well environment more complicated in Vertical Well during the mode of creeping, ensure that cutting blade accurately arrives predetermined cuts position with this.
In one embodiment, by the crawling device including supporting mechanism, cutting blade is sent to predetermined cuts position, crawling device provides creeping force, provides a stable cut state by being arranged on supporting mechanism on crawling device for cutting blade simultaneously.
In one embodiment, supporting mechanism comprises support arm, at least two support arms are uniformly distributed in the circumference of crawling device, after at least two support arms stretch out in crawling device, cutting blade can be limited to predetermined cuts position like this, make the cut state of cutting blade more stable, improve cutting accuracy.In addition, support arm can stretch out or retract in crawling device, so just makes the activity of support arm become more flexible.
In one embodiment, cutting blade can stretch out along the direction towards pipe string internal wall or retract, and wherein, after cutting blade stretches out along the direction towards pipe string internal wall, cuts tubing string in predetermined cuts position.In a preferred embodiment, cutting blade extending radially out or retracting along tubing string, cutting blade, after the extending radially out of tubing string, cuts tubing string in predetermined cuts position, so advantageously cuts tubing string in cutting blade, improves cutting accuracy.
In one embodiment, the quantity of cutting blade is identical with support arm quantity, and when at least two cutting blades cut tubing string simultaneously, the efficiency that cutting blade can be made to cut tubing string is improved.
In one embodiment, the quantity of cutting blade is one.
In one embodiment, preset stopping condition comprises cutting blade and reaches predetermined and stretch out value or default Oscillation Amplitude.Predetermined value of stretching out refers to cutting blade and cuts the length of stretching out required for the tube wall of tubing string.Default Oscillation Amplitude refers to cutting blade and cuts the later Oscillation Amplitude of the tube wall of tubing string.Like this can available protecting cutting blade, increase the service life, also improve cutting accuracy simultaneously.
Compared with prior art, the invention has the advantages that the cutting blade of this tubing string cutting method can by the predetermined cuts position accurately sent in tubing string, the precision of cutting is ensured with this, the crawling device including supporting mechanism can under tubing string environment comparatively complicated situation, for cutting blade arrives predetermined cuts position and provide creeping force.In addition, supporting mechanism for providing a stable cut state when cutting blade cuts, can improve cutting efficiency and cutting accuracy.By the work information collected and the stop condition preset are carried out real-time comparison, control the cutting process of cutting blade with this, further increasing cutting accuracy.
Accompanying drawing explanation
Also will be described in more detail the present invention with reference to accompanying drawing based on embodiment hereinafter.
Fig. 1 is the using state schematic diagram of tubing string cutting equipment of the present invention.
Fig. 2 is the structural representation of crawling device of the present invention.
Fig. 3 is the cutting blade schematic diagram of the first embodiment of the present invention.
Fig. 4 is the cutting blade schematic diagram of the second embodiment of the present invention.
Fig. 5 is tubing string cutting method schematic flow sheet of the present invention.
In the accompanying drawings, identical parts use identical Reference numeral.Accompanying drawing is not according to the scale of reality.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 show schematically show the using state of tubing string cutting equipment 10 of the present invention.Tubing string cutting equipment 10 comprises: above ground portion and cutting part.
Wherein, above ground portion comprises power supply 11, cable 14, information processor 12 and supervising device 13.Cutting part comprises information collecting device 16, crawling device 17, drive unit 18 and cutter sweep 19.
As shown in Figure 1, to be fixedly connected with the cable head 15 of one end of cable 14 and for the information collecting device 16 of Information Monitoring; The crawling device 17 be fixedly connected with information collecting device 16, crawling device 17 includes supporting mechanism, the cutting part of tubing string cutting equipment 10 can be anchored in tubing string by supporting mechanism, makes the cutting part of tubing string cutting equipment 10 keep enough good stable state when cutting.Crawling device 17 can drive the cutting part of tubing string cutting equipment 10 to be moved along the axis of tubing string by the mode of creeping, crawling device 17 is when the cutting part of tubing string cutting equipment 10 can not arrive cutting position by self gravitation, cutting part for tubing string cutting equipment 10 provides extra power of creeping, and ensures under the working condition of complexity, make the cutting part of tubing string cutting equipment 10 still can arrive predetermined cuts position.Crawling device 17 also plays certain supporting role to the cutting part of tubing string cutting equipment 10 simultaneously.The drive unit 18 be fixedly connected with crawling device 17, is connected with drive unit 18 and cutter sweep 19 for cutting tubing string, and drive unit 18 provides driving force for cutter sweep 19, drives cutter sweep 19 to rotate; To be connected with the other end of cable 14 and for the supervising device 13 of watch-dog Operation Conditions and the information processor 12 of information that collects for the treatment of information collecting device 16.
Cable 14 also plays a part pulling apparatus while transmitting electric power and the signal of telecommunication, this, simplifies the structure of equipment.Supervising device 13 and information collecting device 16 mainly gather the work information from crawling device 17, drive unit 18 and cutter sweep 19, then the signal collected is sent to information processor 12, again action command is issued to each device by after information processor 12 computational analysis.
The cutting part that supporting mechanism can realize tubing string cutting equipment 10 is located comparatively accurately and is fixed in tubing string by equipment in tubing string.Drive unit 18 provides driving force for other component in equipment, such as, cutter sweep 19 can be driven to rotate.The cutter sweep 19 being arranged on cutting part one end of tubing string cutting equipment 10 is mainly used in tubing string cutting.
Fig. 2 show schematically show the structure of crawling device 17.
In one embodiment, supporting mechanism crawling device 17 arranged comprises support arm 171.Stretch out in the space that support arm 171 can hold support arm 171 on crawling device 17 or retract, the location that so just can realize the precut position of cutting part in pipe of tubing string cutting equipment 10 is fixed and to remove location fixing, adds the stability of cutting part when cutting tubing string of tubing string cutting equipment 10.In one embodiment, crawling device 17 is arranged on the middle part of the cutting part of tubing string cutting equipment 10, and at least two support arms 171 are uniformly distributed in the circumference of crawling device 17, after at least two support arms 171 stretch out in crawling device 17, cutter sweep 19 can be limited to predetermined cuts position, make the cut state of cutter sweep 19 more stable, the stability when cutting part further ensuring tubing string cutting equipment 10 like this cuts in tubing string, contributes to improving cutting efficiency and cutting accuracy.
Fig. 3 show schematically show the structure of cutter sweep 19.Cutter sweep 19 is provided with cutting blade 191, cutting blade 191 is fixedly connected with the tool rest on cutter sweep 19 by pin 192.
In one embodiment, cutting blade 191 can stretch out along the direction towards pipe string internal wall or retract, and wherein, after cutting blade 191 stretches out along the direction towards pipe string internal wall, cuts tubing string in predetermined cuts position.In a preferred embodiment, cutting blade 191 extending radially out or retracting along tubing string, cutting blade 191, after the extending radially out of tubing string, cuts tubing string in predetermined cuts position, so advantageously cut in cutting blade 191 pairs of tubing strings, improve cutting accuracy.
In a first embodiment, the cutting blade 191 identical with the quantity of support arm 171 is uniformly distributed in the circumference of cutter sweep 19, the symmetry that cutting blade 191 keeps good in cutting process can be made like this, improve the cutting stability of cutting blade 191, effectively extend the application life of cutting blade 191.
In a second embodiment, as shown in Figure 4, cutter sweep 19 ＇ is provided with cutting blade 191 ＇, cutting blade 191 ＇ is fixedly connected by the tool rest on pin 192 ＇ and cutter sweep 19 ＇.
In one embodiment; cutting blade 191 can extending radially out or retracting along cutter sweep 19; or extending radially out or retracting along tubing string; preferably; along extending radially out or retracting perpendicular to pipe string internal wall; stretch out when cutter sweep 19 reaches setting speed and cut, retracting after completing cutting work, so just effectively protecting cutting blade 191 injury-free in cutting process.
The method of the cutting part using tubing string cutting equipment 10 of the present invention is described below with reference to the accompanying drawings.As shown in Figure 5, the method mainly comprises step as described below.
Step S510, the cutting part of tubing string cutting equipment 10 arrives the predetermined cuts position of tubing string by deadweight, or the cutting part of tubing string cutting equipment 10 arrives predetermined cuts position by crawling device 17 with reptile fashion.
Step S520, crawling device 17 is provided with supporting mechanism, and the cutting part of tubing string cutting equipment 10 is anchored on the pipe string internal wall of predetermined cuts position by supporting mechanism.
Step S530, drive unit 18 drives cutter sweep 19 to rotate, and cutter sweep 19 drives cutting blade 191 to rotate.
Step S540, drive unit 18, after the rotating speed of cutting blade 191 arrives pre-set velocity, utilizes cutting blade 191 to cut in predetermined cuts position.
Step S550, information collecting device 16 gathers work information during cutting.
Step S560, information processor 12 processes work information during cutting.
Step S570, supervising device 13 shows cutting blade 191 and reaches predetermined and stretch out value or default Oscillation Amplitude.
Step S580, stops cutting, reclaims the cutting part of tubing string cutting equipment 10.
It is above-mentioned that predetermined to stretch out value be that cutting blade 191 cuts the length of stretching out required for the tube wall of tubing string.Default Oscillation Amplitude is the Oscillation Amplitude after cutting blade 191 cuts the tube wall of tubing string.When cutting the tube wall of tubing string, the Oscillation Amplitude of cutting blade 191 or the Oscillation Amplitude of cutter sweep 19 entirety larger; After cutting blade 191 cuts tube wall, Oscillation Amplitude or the cutter sweep 19 body vibration amplitude of cutting blade 191 are less.
Although invention has been described with reference to preferred embodiment, without departing from the scope of the invention, various improvement can be carried out to it and parts wherein can be replaced with equivalent.Especially, only otherwise there is structural hazard, the every technical characteristic mentioned in each embodiment all can combine in any way.The present invention is not limited to specific embodiment disclosed in literary composition, but comprises all technical schemes fallen in the scope of claim.
Claims (10)
1., for a cutting method for Oil/gas Well tubing string, the method comprises:
Cutting blade is sent to the predetermined cuts position of tubing string;
By a supporting mechanism, described cutting blade is limited to described predetermined cuts position;
Described cutting blade is driven to cut described tubing string in described predetermined cuts position;
Gather work information during described cutting;
When described work information meets preset stopping condition, stop described cutting.
2. method according to claim 1, is characterized in that, by the mode of conducting oneself with dignity or creep, described cutting blade is sent to described predetermined cuts position.
3. method according to claim 1, is characterized in that, by the crawling device including described supporting mechanism, described cutting blade is sent to described predetermined cuts position.
4. according to the method in claim 2 or 3, it is characterized in that, described supporting mechanism comprises support arm, and at least two described support arms are uniformly distributed in the circumference of described crawling device.
5. method according to claim 4, is characterized in that, described support arm can stretch out or retract in described crawling device; When described support arm stretches out in described crawling device, described cutting blade is limited to described predetermined cuts position.
6. method according to claim 5, is characterized in that, described cutting blade can stretch out along the direction towards described pipe string internal wall or retract; Described cutting blade carries out described cutting in described predetermined cuts position to described tubing string after stretching out along the direction towards described pipe string internal wall.
7. method according to claim 6, is characterized in that, the extending radially out or retracting along described tubing string of described cutting blade; Described cutting blade, after the extending radially out of described tubing string, carries out described cutting in described predetermined cuts position to described tubing string.
8. method according to claim 7, is characterized in that, the quantity of described cutting blade is identical with described support arm quantity.
9. method according to claim 7, is characterized in that, the quantity of described cutting blade is one.
10. the method according to any one of claim 1 to 9, is characterized in that, described preset stopping condition comprises described cutting blade and reaches predetermined and stretch out value or default Oscillation Amplitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410419897.1A CN105370231A (en) | 2014-08-22 | 2014-08-22 | Cutting method for tubular column in oil-gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410419897.1A CN105370231A (en) | 2014-08-22 | 2014-08-22 | Cutting method for tubular column in oil-gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105370231A true CN105370231A (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410419897.1A Pending CN105370231A (en) | 2014-08-22 | 2014-08-22 | Cutting method for tubular column in oil-gas well |
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| CN (1) | CN105370231A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855060A (en) * | 2021-02-19 | 2021-05-28 | 西安石竹能源科技有限公司 | Cable-driven underground cutting instrument and control method |
| CN113969758A (en) * | 2021-10-25 | 2022-01-25 | 北方斯伦贝谢油田技术（西安）有限公司 | Oil pipe tubular column cutting device with pressure balancer |
| CN114310674A (en) * | 2021-12-02 | 2022-04-12 | 烟台杰瑞石油装备技术有限公司 | Cutting device and cutting method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855060A (en) * | 2021-02-19 | 2021-05-28 | 西安石竹能源科技有限公司 | Cable-driven underground cutting instrument and control method |
| CN113969758A (en) * | 2021-10-25 | 2022-01-25 | 北方斯伦贝谢油田技术（西安）有限公司 | Oil pipe tubular column cutting device with pressure balancer |
| CN113969758B (en) * | 2021-10-25 | 2023-10-20 | 北方斯伦贝谢油田技术（西安）有限公司 | Oil pipe tubular column cutting device with pressure balancer |
| CN114310674A (en) * | 2021-12-02 | 2022-04-12 | 烟台杰瑞石油装备技术有限公司 | Cutting device and cutting method |
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Application publication date: 20160302 |
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