CN104141476A - Perforation device and perforation method by using same - Google Patents
Perforation device and perforation method by using same Download PDFInfo
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- CN104141476A CN104141476A CN201310475708.8A CN201310475708A CN104141476A CN 104141476 A CN104141476 A CN 104141476A CN 201310475708 A CN201310475708 A CN 201310475708A CN 104141476 A CN104141476 A CN 104141476A
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- bridging plug
- setting tool
- piston cylinder
- perforation
- central tube
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Abstract
The invention relates to a perforation device and a perforation method by using the same. The perforation device comprises a perforator connected with an oil tube in a cut-through manner, a bridge plug setting tool fixedly mounted at the downstream part of the perforator and a bridge plug connected with the bridge plug setting tool through a first shear pin, wherein the perforator can further comprise a locator. The perforation device adopts the bridge plug for plugging, a plug surface is accurately controlled, and besides, the perforation device achieves perforation through hydraulic pressure, so that the construction safety is improved.
Description
Technical field
The present invention relates to a kind of oil gas well completion device, particularly a kind of perforating system.The invention still further relates to the method that uses this perforating system perforation.
Background technology
In oil gas well completion process, in the Oil/gas Well that employing perforation completes, preforation tunnel is unique passage of linking up payzone and pit shaft.For suitable reservoir, adopt suitable perforating system can improve perforating quality, and the injury of reservoir is reduced to minimum.
After conventional Oil/gas Well coiled tubing staged fracturing method mainly contains layering hydraulic jet perforation at present, carry out pressure break, and coiled tubing band is across block envelope pressure break every packer.While using hydraulic jet perforation, after one section of design level position perforation, pressure break complete, need to form sand plug with plugging construction layer position to back-up sand in well, and then upper lifting pipe post to the second design level position, proceed hypomere construction operation, so repeatedly, until construction finishes.This kind of method exists back-up sand sand face control difficulty large, causes back-up sand repeatedly, sand washing operation, cause constructing discontinuous, and the problem that the engineering time is long, this construction method is especially inadaptable to horizontal well.
Coiled tubing band is first according to designing requirement position, required fractured interval all to be carried out to perforating job across block envelope pressure break every packer, then with coiled tubing band across successively carrying out pressing crack construction every packer, after one section of construction, upper lifting pipe post aim at next interval again set packer carry out fracturing work, so repeatedly, until construction end.The method need to first be carried out perforating job, and construction is inconvenient.
Summary of the invention
For existing above-mentioned technical problem in prior art, the present invention proposes a kind of perforating system, it uses bridging plug to carry out shutoff, the precise control of plug face.In addition, this perforating system is realized perforation by hydraulic coupling, has improved the safety of construction.The invention still further relates to the method that uses this perforating system perforation.
According to a first aspect of the invention, a kind of perforating system has been proposed, comprise and the through perforator being connected of oil pipe, the bridging plug that is fixedly mounted on the bridging plug setting tool in perforator downstream and is connected with bridging plug setting tool by the first shear pin, wherein, bridging plug setting tool comprises the central tube being fixedly connected with the downstream of perforator, be provided with the ring-type junction piece radially outward protruding at the downstream end of central tube, guided and slidingtype is enclosed within the piston cylinder in central tube outside by ring-type junction piece, be provided with in the downstream part of piston cylinder with the locating ring protruding radially inwardly of ring-type junction piece cooperation and the downstream end of piston cylinder and contact with bridging plug, be arranged on the piston in the gap between central tube and piston cylinder, piston and the compartment setting of ring-type junction piece and can slide along central tube, piston is connected with central tube with piston cylinder by the second shear pin, in the time of perforation, bridging plug setting tool can drive piston cylinder to realize bridging plug towards downstream motion and set under outside fluid power effect, perforator can will be injected into its inner perforating fluid ejaculation and realize perforation afterwards.
According to perforating system of the present invention, only just can realize bridging plug by hydraulic coupling and set, avoid the means such as use gunpowder to set, greatly improve the safety that sets construction, reduced difficulty of construction simultaneously.In addition, perforating system of the present invention has used bridging plug to carry out shutoff, has avoided back-up sand repeatedly during perforation, sand washing operation, has reduced construction cost.
In one embodiment, perforator is the tubular body that is provided with nozzle on sidewall.This perforator simple in structure, and easy to use, reduce construction cost.
In one embodiment, between perforator and bridging plug setting tool, be also fixedly installed and be useful on the locator that makes gun positioning.In a specific embodiment, locator comprises the main body of tubulose, in the circumferential side wall of main body, be configured with groove, by elastic component and the briquetting that is arranged on recess edge can elasticity to protrude the external surface of main body and the mode of retraction is arranged on the locating piece in groove.Perforating system being lowered in the process of inside pipe casing, the locating piece of this locator can combine with casing coupling, thus control easily perforating system in down-hole residing position.In a preferred embodiment, be provided with the projection of radially outward protruding on the external surface of locating piece, projection forms step and is connected with the downstream end inclined-plane of locating piece with the end, upstream of locating piece.Inclined-plane connects and can conveniently perforator be lowered in well, and step makes locating piece to combine with casing coupling, thereby has facilitated the location of perforator.
In one embodiment, bridging plug setting tool also comprises the adjustable ring being fixedly connected with central tube, and piston cylinder slidingtype is between adjustable ring and central tube.By adjustable ring is set, can prevents that piston cylinder from departing from active procedure, thereby ensure stable the carrying out that bridging plug sets.In a preferred embodiment, the upstream portion of piston cylinder is configured to step part that external diameter reduces and between adjustable ring and central tube.This structure makes the overall structure of bridging plug setting tool compacter, has facilitated use.
In one embodiment, central tube, piston cylinder and piston surround the cavity of sealing.Because the pressure in cavity is much smaller than hydraulic coupling, therefore piston can slide towards downstream along central tube swimmingly, pushes cavity, thereby drives piston cylinder towards downstream motion so that bridging plug sets.In a preferred embodiment, the axial length of cavity is less than the axial length of step part.This means that piston cylinder is less than the length of step part towards the stroke of downstream motion, piston piston in motion process can not deviate from from adjustable ring, ensured the stability of piston cylinder motion.
In one embodiment, the quantity of bridging plug setting tool is multiple, and the piston cylinder of the bridging plug setting tool of upstream leans the piston of downstream bridging plug setting tool, and the piston cylinder of the bridging plug setting tool in downstream leans bridging plug.By multiple bridging plug setting tools are set, bridging plug seating and sealing unit can be realized than the larger setting force of single bridging plug setting tool, thereby contributes to bridging plug to set.
According to a second aspect of the invention, propose to use the method for carrying out perforation according to perforating system mentioned above, comprised the following steps:
Step 1: described perforating system is lowered in sleeve pipe to precalculated position;
Step 2: to filling liquid in oil jacket annular space and set bridging plug, cut off described the first shear pin and will carry on perforator to perforation position;
Step 3: inject perforating fluid in described oil pipe, carry out perforation;
Step 4: after perforation finishes, perforating system is proposed to well head;
Step 6: repeating step one to four, completes the perforation of full well.
In one embodiment, in step 1, by the locating piece of locator is engaged to the location of realizing perforating system with casing coupling.
In this application, term " upstream " refers to the direction towards ground, and term " downstream " refers to the direction contrary with upstream.
Compared with prior art, the invention has the advantages that, perforating system of the present invention uses fluid power to realize bridging plug and sets, gives up and perforation, and the no longer priming system such as detonator, gunpowder has improved the safety of constructing greatly, has reduced construction organization difficulty and construction cost.The pollution that uses perforating fluid perforation enough to avoid common perforation to cause stratum.In addition, perforating system of the present invention has used bridging plug to carry out shutoff, has avoided back-up sand repeatedly during perforation, sand washing operation, has reduced construction cost.Locator is set on perforating system and can accurately controls the down well placement of perforating system, so that perforation is carried out in desirable stratum.
Brief description of the drawings
To be described in more detail the present invention based on embodiment and with reference to accompanying drawing hereinafter.Wherein:
Fig. 1 is according to the overall schematic of the perforating system of first embodiment of the invention;
Fig. 2 is according to the overall schematic of the perforating system of second embodiment of the invention;
Fig. 3 is the structural representation according to perforator of the present invention;
Fig. 4 is the structural representation according to locator of the present invention;
Fig. 5 is according to the structural representation of bridging plug setting tool of the present invention;
Fig. 6 is the zoomed-in view of the A part in Fig. 5.
In the accompanying drawings, identical parts use identical Reference numeral.Accompanying drawing is not according to actual scale.
Detailed description of the invention
The invention will be further described will to engage accompanying drawing below.
Fig. 1 has schematically shown the perforating system 100 according to first embodiment of the invention.In this embodiment, perforating system 100 comprises and the through perforator being connected 102 of oil pipe 101, bridging plug setting tool 200 and the bridging plug 50 that driven by bridging plug setting tool 200.Fig. 2 has schematically shown the perforating system 100 ' according to second embodiment of the invention.In this embodiment, perforating system 100, except comprising perforator 102, bridging plug setting tool 200 and bridging plug 50, also comprises locator 104.In addition, perforating system 100 also comprises hand pipe nipple 105 devices such as grade, and these devices are that those skilled in the art is known, repeat no more here.If oil pipe 101, releasing pup joint 105(have), perforator 102, locator 104(as shown in Figure 2), bridging plug setting tool 200 assembles successively according to the order that is from upstream to downstream, and is threaded connection.Be provided with bridging plug 50 in the downstream of bridging plug setting tool 200 and pass through the first shear pin 103(as shown in Figure 5) both are connected.
As shown in Figure 3, perforator 102 is substantially tubulose, is provided with the nozzle 301 for jet perforating liquid on its sidewall.The material that forms nozzle 301 is firm wear-resisting, to avoid in perforation process by Fast Wearing.Conventionally, can in stratum, form multiple holes to realize multiple nozzles are upwards evenly set in the week of perforator 102 simultaneously.
Fig. 4 has schematically shown the structure of locator 104.Locator 104 includes the main body 401 of tubulose, is configured with groove 402 and is arranged on the locating piece 403 in groove 402 in the circumferential side wall of main body 401.As shown in Figure 4, it is outwardly that locating piece 403 is configured to mid portion, like this at locating piece 403 by such as spring of elastic component 404() be arranged on groove 402 in and by behind briquetting 405,406 location arranging around groove 402, the surface that can protrude under pressure locator 104 in locating piece 403 combines with casing coupling (not shown) and realizes location, can also be retracted into groove 402 interior and do not hinder the motion of perforating system 100.
In order locator 104 can be realized accurately locate in down-hole and to be convenient to motion, on the external surface of locating piece 403, be provided with the projection 407 of radially outward protruding, and projection 407 forms step 408 and is connected by inclined-plane 409 with the downstream end of locating piece 403 with the end, upstream of locating piece 403.Like this, during by locator 104 G.I.Hs, inclined-plane 409 not can with sleeve pipe (not shown) generation hook, but by under the effect of elastic component 404 in the mode of " clamp-oning " through sleeve pipe, thereby facilitated being lowered to of perforating system 100.In the time that perforating system 100 needs located perforating, will on perforating system 100, carry, at this moment the projection 407 on locating piece 403 is understood the location that engage with casing coupling radially outward protruding of elastic component 404 and realize perforating system 100.It should be noted that, the protrusion height of projection 407 can not form very firmly and be connected with casing coupling, but can this connection pull open so that perforating system 100 is taken out from sleeve pipe under certain pulling force.
Fig. 5 has schematically shown two bridging plug setting tools 20 and 40 that series connection arranges.The structure of these two bridging plug setting tools is substantially identical, is only described as an example of the bridging plug setting tool 20 of upstream example below.
Bridging plug setting tool 20 comprises the central tube 21 being fixedly installed, and is socketed in the piston cylinder 22 outside central tube 21.Be provided with radially outward the ring-type junction piece 23 protruding at the downstream end of central tube 21,22 of piston cylinders are under the guiding of ring-type junction piece 23 and can arrange slidably.For fear of piston cylinder 22 central tube 21 that slips away, be provided with the locating ring protruding radially inwardly 24 coordinating with ring-type junction piece 23 in the downstream part of piston cylinder 22.In confined state, the downstream of locating ring 24 in ring-type junction piece 23, only can move along central tube 21 piston cylinder 22 towards downstream.
In the upstream portion in the gap between central tube 21 and piston cylinder 22, be provided with piston 25, piston 25 is connected with central tube 21 with piston cylinder 22 by the second shear pin 26 simultaneously.For piston 25 is moved towards downstream with respect to central tube 21 together with piston cylinder 22, the diameter that the second shear pin 26 is made as to its part being connected with central tube 21 is less than the diameter of its part being connected with piston cylinder 22, can realization only cuts off part that the connected part of the second shear pin 26 central tube 21 ensures that the second shear pin 26 is connected with piston cylinder 22 and realizes this object for intact by controlling hydraulic coupling.In addition, in original state, also piston 25 is set to keep at a certain distance away with ring-type junction piece 23, makes piston 25 there is space.In a specific embodiment, on the contact surface of piston 25 and piston cylinder 22, be provided with the first seal, on the face that is provided with the second seal on the face contacting with central tube 21 at piston 25, contact with piston cylinder 22 at ring-type junction piece 23, be provided with the 3rd seal, central tube 21, piston cylinder 22 and piston 25 surround the cavity 30 of sealing thus.The existence of cavity 30, can avoid the sliding path of piston 25 contaminated or damaged, thereby ensures that piston 25 can smooth sliding.
In order further to ensure piston 25 and piston cylinder 22 energy smooth sliding, bridging plug setting tool 20 also comprises the adjustable ring 31 being fixedly connected with central tube 21, for example, be threaded connection.The upstream portion slidingtype of piston cylinder 22 is between adjustable ring 31 and central tube 21.As shown in Figure 5, be fixedly installed top connection 32 in the upstream of central tube 21, adjustable ring 31 is configured to cylindric and its upstream portion and top connection 32 is threaded togather and downstream part is vacant state, and the upstream portion of piston cylinder 22 is between the unsettled downstream part of adjustable ring 31 and central tube 21.In the motion process of piston cylinder 22, piston cylinder 22 can be subject to the constraint of adjustable ring 31 and central tube 21, and only can in axial direction, move, thereby can ensure stable the carrying out that bridging plug sets.
In a specific embodiment, be provided with the step part 33 of reduced diameter in the upstream portion of piston cylinder 22, it extends to the end, upstream of piston cylinder 22 and between adjustable ring 31 and central tube 21, as shown in Figure 6.In addition, the axial length of cavity 30 is less than the axial length of step part 33, even if piston 25 slides into final position like this, step part 33(, piston cylinder 22) be still subject to the constraint of adjustable ring 31, thereby can ensure the stable motion of piston 25 and piston cylinder 22.That piston cylinder 22 has gap 35 with the bonding part of adjustable ring 31, as shown in Figure 6 with should also be noted that.Liquid can apply the active force towards downstream to piston 25 by this gap 35, thereby driven plunger 25 and piston cylinder 22 move towards downstream.
The bridging plug setting tool 40 in downstream is substantially identical with the structure of the bridging plug setting tool 20 of upstream, for simplicity, only describes both differences here.As shown in Figure 5, the piston 45 of bridging plug setting tool 40 contacts with the downstream end of the piston cylinder 22 of upstream bridging plug setting tool 20, it is applied to the active force towards downstream.Be fixedly connected with lower contact 43 with the inner side of the downstream end of the central tube 21 ' matching of bridging plug setting tool 40, lower contact 43 is fixedly connected with bridging plug 50 by the first shear pin 103 again.The downstream part of the piston cylinder 42 of bridging plug setting tool 40 also contacts with bridging plug 50, so that proper piston cylinder 42 can be realized setting of bridging plug 50 towards downstream motion under the effect of the piston cylinder 22 of hydraulic coupling or upstream bridging plug setting tool 20 time.
Perforating system 100 according to the present invention described carried out the method for perforation below according to Fig. 1 to 6.The method comprises the following steps: first perforating system 100 is lowered in sleeve pipe to precalculated position.Preferably, this is by engaging the locating piece of locator 104 403 location of realizing perforating system 100 with casing coupling.Then, (, the space between oil pipe 101 and the sleeve pipe in oil pipe 101 outsides) filling liquid in oil jacket annular space.Under action of hydraulic force, the piston cylinder 22 of bridging plug setting tool 20 and the piston cylinder of bridging plug setting tool 40 42 can be realized setting of bridging plug 50 towards downstream motion, cut off the first shear pin 103 and will on perforator 102, carry to perforation position.Then, to the interior injection perforating fluid of oil pipe 101.Perforating fluid penetrates fast by the nozzle 301 on perforator 102, punches sleeve pipe and constructs and portal in stratum, carries out perforation.In one embodiment, perforating fluid is the water that contains quartz sand, and the weight content of for example quartz sand is between 5%-10%.After one deck stratum perforation finishes, upwards lift perforating system 100 and perforating system 100 is proposed to well head.Giving perforating system 100 again after fit on bridging plug, G.I.H again, to proceed perforation, so continues until complete perforation construction.
Although invention has been described with reference to preferred embodiment, without departing from the scope of the invention, can carry out various improvement and can replace parts wherein with equivalent it.Especially, only otherwise have structural hazard, every technical characterictic of mentioning in each embodiment all can combine in any way.The present invention is not limited to disclosed specific embodiment in literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (12)
1. a perforating system, comprises with the through perforator being connected of oil pipe, is fixedly mounted on the bridging plug setting tool in described perforator downstream and passes through the bridging plug that the first shear pin is connected with described bridging plug setting tool,
Wherein, described bridging plug setting tool comprises the central tube being fixedly connected with the downstream of described perforator, be provided with the ring-type junction piece radially outward protruding at the downstream end of described central tube, by described ring-type junction piece guiding, slidingtype is enclosed within the piston cylinder in described central tube outside, be provided with in the downstream part of described piston cylinder with the locating ring protruding radially inwardly of described ring-type junction piece cooperation and the downstream end of described piston cylinder and contact with described bridging plug, be arranged on the piston in the gap between described central tube and described piston cylinder, described piston and described ring-type junction piece compartment arrange and can slide along described central tube, described piston is connected with described central tube with described piston cylinder by the second shear pin,
Before perforation, described bridging plug setting tool can drive described piston cylinder to realize described bridging plug towards downstream motion and set under outside fluid power effect, and described perforator can will be injected into its inner perforating fluid ejaculation and realize perforation afterwards.
2. perforating system according to claim 1, is characterized in that, between described perforator and described bridging plug setting tool, is also fixedly installed and is useful on the locator that makes described gun positioning.
3. perforating system according to claim 2, it is characterized in that, described locator comprises the main body of tubulose, in the circumferential side wall of main body, be configured with groove, by elastic component and the briquetting that is arranged on described recess edge can elasticity to protrude the external surface of described main body and the mode of retraction is arranged on the locating piece in described groove.
4. perforating system according to claim 3, it is characterized in that, on the external surface of described locating piece, be provided with the projection of radially outward protruding, described projection forms step and is connected with the downstream end inclined-plane of described locating piece with the end, upstream of described locating piece.
5. according to the perforating system described in any one in claim 1 to 4, it is characterized in that, described perforator is the tubular body that is provided with nozzle on sidewall.
6. according to the perforating system described in any one in claim 1 to 5, it is characterized in that, described bridging plug setting tool also comprises the adjustable ring being fixedly connected with described central tube, and described piston cylinder slidingtype is between described adjustable ring and described central tube.
7. bridging plug setting tool according to claim 6, is characterized in that, described central tube, piston cylinder and piston surround the cavity of sealing.
8. perforating system according to claim 7, is characterized in that, the upstream portion of described piston cylinder sidewall is configured to step part that external diameter reduces and between described adjustable ring and described central tube.
9. bridging plug setting tool according to claim 8, is characterized in that, the axial length of described cavity is less than the axial length of described step part.
10. according to the perforating system described in any one in claim 1 to 9, it is characterized in that, the quantity of described bridging plug setting tool is multiple, and the piston cylinder of the bridging plug setting tool of upstream leans the piston of downstream bridging plug setting tool, the piston cylinder of the bridging plug setting tool in downstream leans described bridging plug.
Perforating system in 11. 1 kinds of right to use requirements 1 to 10 described in any one carries out the method for perforation, comprises the following steps:
Step 1: described perforating system is lowered in sleeve pipe to precalculated position;
Step 2: to filling liquid in oil jacket annular space and set bridging plug, cut off described the first shear pin and will carry on described perforator to perforation position;
Step 3: inject perforating fluid in described oil pipe, carry out perforation;
Step 4: after perforation finishes, perforating system is proposed to well head;
Step 5: repeating step one to four, completes the perforation of full well.
12. perforating systems according to claim 10, is characterized in that, in described step 1, by the locating piece of described locator is engaged to the location of realizing described perforating system with casing coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310475708.8A CN104141476B (en) | 2013-10-12 | 2013-10-12 | Perforating system and the method using its perforation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310475708.8A CN104141476B (en) | 2013-10-12 | 2013-10-12 | Perforating system and the method using its perforation |
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| Publication Number | Publication Date |
|---|---|
| CN104141476A true CN104141476A (en) | 2014-11-12 |
| CN104141476B CN104141476B (en) | 2016-08-17 |
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| CN201310475708.8A Active CN104141476B (en) | 2013-10-12 | 2013-10-12 | Perforating system and the method using its perforation |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6206100B1 (en) * | 1999-12-20 | 2001-03-27 | Osca, Inc. | Separable one-trip perforation and gravel pack system and method |
| CN202215197U (en) * | 2011-07-25 | 2012-05-09 | 中国石油天然气股份有限公司 | Quick drilling composite bridge plug for horizontal well |
| CN202900060U (en) * | 2012-11-12 | 2013-04-24 | 中国石油天然气股份有限公司 | Coiled tubing perforation, casing fracturing and bridge plug packing process pipe string |
-
2013
- 2013-10-12 CN CN201310475708.8A patent/CN104141476B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6206100B1 (en) * | 1999-12-20 | 2001-03-27 | Osca, Inc. | Separable one-trip perforation and gravel pack system and method |
| CN202215197U (en) * | 2011-07-25 | 2012-05-09 | 中国石油天然气股份有限公司 | Quick drilling composite bridge plug for horizontal well |
| CN202900060U (en) * | 2012-11-12 | 2013-04-24 | 中国石油天然气股份有限公司 | Coiled tubing perforation, casing fracturing and bridge plug packing process pipe string |
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| CN104141476B (en) | 2016-08-17 |
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