CN205382910U - Fracturing is with removing bridging plug certainly - Google Patents

Fracturing is with removing bridging plug certainly Download PDF

Info

Publication number
CN205382910U
CN205382910U CN201521125674.0U CN201521125674U CN205382910U CN 205382910 U CN205382910 U CN 205382910U CN 201521125674 U CN201521125674 U CN 201521125674U CN 205382910 U CN205382910 U CN 205382910U
Authority
CN
China
Prior art keywords
bridging plug
destructor
slips
pressure break
support tube
Prior art date
Application number
CN201521125674.0U
Other languages
Chinese (zh)
Inventor
胡阳明
李宪文
张燕明
来轩昂
马占国
何明舫
毕曼
叶亮
郝瑞芬
马新星
刘晓瑞
问晓勇
高伟
Original Assignee
中国石油天然气股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国石油天然气股份有限公司 filed Critical 中国石油天然气股份有限公司
Priority to CN201521125674.0U priority Critical patent/CN205382910U/en
Application granted granted Critical
Publication of CN205382910U publication Critical patent/CN205382910U/en

Links

Abstract

The utility model provides a fracturing is with removing bridging plug certainly includes at least that from the bottom up cover establishes base, slips, a support section of thick bamboo, packing element, the ball seat on the center tube, still includes the fracturing ball sealer who places on the ball seat, wherein the slips cover is established in the lower part of supporting a section of thick bamboo, it is the components of a whole that can function independently to support a section of thick bamboo, and upper portion be supporting tin, and the lower part is an under bracing section of thick bamboo, the lower extreme of an under bracing section of thick bamboo is the toper, an under bracing section of thick bamboo with go up supporting and being connected with the 2nd explosive device between the section of thick bamboo, the 2nd explosive device sets up in the slips top, has solved because bridging plug spare part is more, the structure is complicated among the prior art, exist to bore to grind the difficulty, bore the risk of grinding the cycle length, and no matter be coiled tubing bore grind the bridging plug still conventional oil pipe bore the mill bridging plug, the cost is all higher, and bore in sensitive stratum and grind the bridging plug, owing to bore the use of grinding the working solution, probably result in the technical problem of reservoir injury, it is easy and simple to handle.

Description

A kind of pressure break is with from removing bridging plug

Technical field

This utility model relates to oil gas field straight well and directional well fractured well lower leaf technical field of tools, particularly to a kind of pressure break with from removing bridging plug.

Background technology

Fine and close oil gas is a kind of important non-conventional oil natural gas resource, but there is the marked feature that monolayer yields poorly.In order to realize the benefit exploitation of fine and close oil gas, strengthening on the basis of RESERVOIR RECOGNITION and preferred well location, it is necessary to employing the multiple reservoirs on longitudinally simultaneously, thus improving well yield, extending the gas well liquid loading cycle, the final Efficient Development realizing fine and close oil gas.

At present, in the fracturing technique of straight well and directional well, there is a kind of mode using bridging plug to carry out separate stratum fracfturing, bridging plug by being set by setting tool under cable behind precalculated position, after having set, target zone is carried out pressing crack construction, this target zone is constructed under after terminating and is entered another grade of bridging plug, a upper target zone is blocked, completes the pressing crack construction of next target zone.After pressing crack constructions at different levels complete, by bore mill bridging plug or wait closure pressure break ball dissolving after, enter flow string under ability and produce.

But, in realizing process of the present utility model, utility model people finds that prior art at least there is problems in that

Bridging plug parts are more, structure is complicated, there is the risk boring mill difficulty, brill mill cycle length, and no matter are that continuous tubing drill grinds bridging plug or conventional oil pipe bores mill bridging plug, and cost is all higher;Sensitive stratum is bored mill bridging plug, owing to boring the use of mill working solution, it is possible to cause reservoir damage.Additionally, the performance of solvable pressure break ball influences whether the dissolving in the wellbore of solvable pressure break ball, even occur that the dope after dissolving cannot discharge pit shaft, causing cannot the situation of discharge opeing, and adopt the Oil/gas Well of " solvable pressure break ball+bridging plug ", there is the determination of wellbore integrity difference, it is impossible to meet the operations such as later stage test, well workover and secondary transformation.

Utility model content

In order to overcome in prior art owing to bridging plug parts are more, structure is complicated; there is the problem bored mill difficulty, bore the risk of mill cycle length; this utility model provides a kind of pressure break with from removing bridging plug; this utility model simple in construction; operational approach is easy; there is good plugging effect, it is possible to save and bore mill bridging plug cost, evade the solvable undissolved risk of pressure break ball and reservoir can be protected better.

The technical solution adopted in the utility model is:

A kind of pressure break is with from removing bridging plug, at least include the base being set on central canal from top to bottom, slips, support tube, packing element, ball seat, also include the fracturing plugging ball placed on ball seat, wherein said slip sleeve is located at the bottom of support tube, described support tube is split, top is upper support tube, bottom is lower support cylinder, the lower end of described lower support cylinder is tapered, it is connected to the second destructor between described lower support cylinder and described upper support tube, this second destructor is arranged on above slips, second destructor Shi Yige center is with through hole annular seal space, this through hole is for central canal traverse;

The upper end of described upper support tube is tapered, on this, support tube top is connected to the first destructor, the external diameter of this first destructor and described packing element internal diameter corresponding matching, first destructor Shi Yige center is with through hole annular seal space, this through hole is for central canal traverse, described first destructor and the second destructor structure are identical, the first destructor and be all placed with explosive element in the second destructor.

Described explosive element is made up of time-delay relay, battery, explosive and electric cap, and time-delay relay, battery and electric cap form a loop, and electric cap inserts in explosive.

Described explosive element is time bomb.

Described base side offers multiple pin hole.

Described packing element is that aluminum core outer wrap rubber peel is made by inside.

Described slips is ceramic material.

The external diameter of described packing element is less than the external diameter of ball seat.

The external diameter of described base is more than the external diameter of slips.

Described ball seat is provided with, near the one end setting pushing cylinder, the curved indentations agreed with fracturing plugging ball.

The beneficial effects of the utility model:

This utility model simple in construction, operational approach is easy, has good plugging effect, it is possible to saves and bores mill bridging plug cost, evades the solvable undissolved risk of pressure break ball and can protect reservoir better.After this utility model bridging plug and fracturing plugging ball sealing block up and transformed layer position, next target zone can be carried out pressing crack construction, after completing the pressing crack construction of this target zone, it is possible under continuation, enter another grade of bridging plug, it is achieved the closure to pressure break target zone.By that analogy, when after the pressing crack construction completing all target zones, it is not necessary to bore mill bridging plug or wait that the dissolving of solvable pressure break ball can complete the subsequent production of discharge opeing and Oil/gas Well after pressure.

Below with reference to accompanying drawing, this utility model is described in further details.

Accompanying drawing explanation

Fig. 1 is that this utility model pressure break is with from the structural representation removing bridging plug.

Fig. 2 is destructor structural representation.

Description of reference numerals: 1, central canal;2, pushing cylinder is set;3, ball seat;3A, curved indentations;4, packing element;5A, the first destructor;5B, the second destructor;6, support tube;6A, upper support tube;6B, lower support cylinder;7, slips;8, base;9, shear pin;10, pin hole;11, time-delay relay;12, battery;13, electric cap;14, explosive.

Detailed description of the invention

Embodiment 1:

In order to overcome in prior art owing to bridging plug parts are more, structure is complicated; there is the problem bored mill difficulty, bore the risk of mill cycle length; this utility model provides a kind of pressure break as shown in Figure 1 and Figure 2 with from removing bridging plug; this utility model simple in construction; operational approach is easy; there is good plugging effect, it is possible to save and bore mill bridging plug cost, evade the solvable undissolved risk of pressure break ball and reservoir can be protected better.

As shown in Figure 1, a kind of pressure break is with from removing bridging plug, at least include the base 8 being set on central canal 1 from top to bottom, slips 7, support tube 6, packing element 4, ball seat 3, also include the fracturing plugging ball placed on ball seat 3, wherein said slips 7 is set in the bottom of support tube 6, it is characterized in that: described support tube 6 is split, top is upper support tube 6A, bottom is lower support cylinder 6B, the lower end of described lower support cylinder 6B is tapered, it is connected to the second destructor 5B between described lower support cylinder 6B and described upper support tube 6A, this second destructor 5B is arranged on above slips 7, second destructor 5B Shi Yige center is with through hole annular seal space, this through hole passes for central canal 1;

The upper end of described upper support tube 6A is tapered, on this, support tube 6A top is connected to the first destructor 5A, the external diameter of this first destructor 5A and described packing element 4 internal diameter corresponding matching, first destructor 5A Shi Yige center is with through hole annular seal space, this through hole passes for central canal 1, described first destructor 5A and the second destructor 5B structure are identical, the first destructor 5A and be all placed with explosive element in the second destructor 5B.

This pressure break that the present embodiment provides is with from removing bridging plug, referring to accompanying drawing 1, this utility model embodiment provides a kind of pressure break with from removing bridging plug, be applicable for use with central canal 1 and set pushing cylinder enter for 2 times, set after oil-gas Layer is blocked, this bridging plug includes ball seat 3, packing element 4, the first destructor 5A, upper support tube 6A, the second destructor 5B and lower support cylinder 6B, slips 7, base 8 and fracturing plugging ball.nullOne end of central canal 1 and setting tool set pushing cylinder 2 and connect,Ball seat 3、Packing element 4、Support tube 6、Slips 7 and base 8 are sleeved on central canal 1 successively,The upper end of the other end of ball seat 3 and packing element 4 is close together,Packing element 4 lower end inside and the first destructor 5A are close together,The upper end of upper support tube 6A is tapered,Cylinder 6B is tapered for lower support,The lower end of the first destructor 5A、The lower end of upper support tube 6A and the lower end of the second destructor 5B separately design the pin thread into screw thread,The upper end of upper support tube 6A、The upper end of the second destructor 5B and the upper end of lower support cylinder 6B separately design the box into screw thread,First destructor 5A and upper support tube 6A、Upper support tube 6A and the second destructor 5B、Second destructor 5B and lower support cylinder 6B is respectively through being threaded togather,It is slips 7 outside lower support cylinder 6B.Slips lower end and base 8 are close together.Base 8 is fixed together by shear pin 9 and central canal 1 so that entering under bridging plug in process, relative displacement can not occur between two for ball seat 3, packing element 4, support tube 6, slips 7 and base 8.

Set in process, the pushing cylinder 2 that sets being set in central canal 1 upper end promotes ball seat 3, packing element the 4, first destructor 5A, upper support tube 6A, the second destructor 5B and lower support cylinder 6B to move down along central canal 1 slip, and lower support cylinder 6B struts slips 7 grappling bridging plug;Meanwhile, upper support tube 6A extrudes packing element 4 expansion plugging fractured layer;Base 8 slides along central canal 1 under the effect of support tube 6 and moves down, and cuts off and connects base 8 and realize separating of adnexa and bridging plug body with the shear pin 9 of central canal 1.After pressing crack construction terminates, the first destructor 5A and the second destructor 5B is detonated, and slips 7, packing element 4 are fragmentated and chip by fried, and each building block of bridging plug falls into shaft bottom, it is achieved automatically removing of bridging plug.Mill bridging plug need not be bored or wait that the dissolving of solvable ball can realize discharge opeing and Oil/gas Well subsequent production.Meanwhile, this utility model reduces cost, it is to avoid bore the mill bridging plug operation injury to reservoir.

The pressure break that the present embodiment provides is with from removing bridging plug simple in construction, and operational approach is easy, has good plugging effect, it is possible to saves and bores mill bridging plug cost, evades the solvable undissolved risk of pressure break ball and can protect reservoir better.

After bridging plug and fracturing plugging ball sealing block up and transformed layer position, next target zone can be carried out pressing crack construction, after completing the pressing crack construction of this target zone, it is possible under continuation, enter another grade of bridging plug, it is achieved the closure to pressure break target zone.By that analogy, when after the pressing crack construction completing all target zones, it is not necessary to bore mill bridging plug or wait that the dissolving of solvable pressure break ball can complete the subsequent production of discharge opeing and Oil/gas Well after pressure.

Embodiment 2:

On basis based on embodiment 1, explosive element described in the present embodiment is made up of time-delay relay 11, battery 12, explosive 14 and electric cap 13, and time-delay relay 11, battery 12 and electric cap 13 form a loop, and electric cap 13 inserts in explosive 14.

Described explosive element is time bomb.

As in figure 2 it is shown, this explosive element is to be formed a loop by time-delay relay 11, battery 12 and electric cap 13, electric cap 13 inserts in explosive 14.

First destructor 5A and second its internal structure of destructor 5B are consistent, are all the loops formed by time-delay relay 11, battery 12 and electric cap 13.After reaching the time arranged on time-delay relay 11, time-delay relay 11, battery 12 and electric cap 13 forming loop by UNICOM, electric cap 13 is ignited, immediately ignition charge 14.

Wherein explosive element can also be time bomb, is usually used in building demolition explosion, opens a mine and dig in mountain.

The external diameter of central canal 1, the i.e. internal diameter of bridging plug, it is possible to the requirement of bridging plug intensity is carried out reducing according to pressing crack construction.That is, when bridging plug needs to bear bigger pressure, the external diameter of central canal 1, namely the internal diameter of bridging plug can be less;On the contrary, when bridging plug is only subjected to less pressure, the external diameter of central canal 1, namely the internal diameter of bridging plug can be bigger.After terminating due to pressing crack construction, bridging plug will be fragmentated or chip by fried, the size of central canal 1 external diameter, and namely the size of bridging plug internal diameter has no effect on discharge opeing and Oil/gas Well subsequent production after pressure.

Further, the consumption of explosive 14 calculates according to central canal 1 external diameter, casing inner diameter and casing strength and determines.That is, when taking into full account casing strength, when casing size one timing, central canal 1 external diameter is more little, and the thickness of the building block such as packing element 4, slips 7 is more big, it is necessary to explosive consumption more big.When calculating the consumption of explosive, central canal 1 external diameter, casing inner diameter and three factors of casing strength should be considered.

Embodiment 3:

On basis based on two embodiments of above formula, in the present embodiment, described base 8 side opening is provided with multiple pin hole 10.Multiple pin hole 10 is set and is easy to install by demand the shear pin of varying number, the shearing force that central canal 1 is given up is set according to the quantity of the shear pin installed.

Described packing element 4 is that aluminum core outer wrap rubber peel is made by inside.

Described slips 7 is ceramic material.

The building block of bridging plug should meet bridging plug enough intensity, it is ensured that plugging effect;Meanwhile, the packing element 4 of bridging plug, slips 7 should have enough fragility, and after igniting the first destructor 5A and the second destructor 5B, the packing element 4 of bridging plug, slips 7 can be fragmentated or chip by fried.The outside that in the present embodiment, the packing element 4 of bridging plug is wrapped in aluminum by rubber peel is made, and slips 7 should be made up of pottery.

Described ball seat 3 is provided with, near the one end setting pushing cylinder 2, the curved indentations 3A agreed with fracturing plugging ball.

The external diameter of packing element 4 is less than the external diameter of ball seat 3, it is to avoid enter under bridging plug in process, packing element and casing wall friction damage.

Further, the external diameter of base 8 is more than the external diameter of slips 7, it is to avoid enter under bridging plug in process, slips and casing wall friction damage.

Further, for fine and close oil and gas reservoir, the sleeve outer generally selected is 88.9mm, 114.3mm, 139.7mm.The bridging plug that this utility model embodiment provides is applicable to coupling these three sleeve pipe specification.

Further, the operating pressure of the bridging plug that this utility model embodiment provides should less than 70MPa, and the operating temperature of bridging plug should less than 150 DEG C.

The pressure break that the present embodiment provides is with from removing bridging plug simple in construction, and operational approach is easy, has good plugging effect, it is possible to saves and bores mill bridging plug cost, evades the solvable undissolved risk of pressure break ball and can protect reservoir better.

After bridging plug and fracturing plugging ball sealing block up and transformed layer position, next target zone can be carried out pressing crack construction, after completing the pressing crack construction of this target zone, it is possible under continuation, enter another grade of bridging plug, it is achieved the closure to pressure break target zone.By that analogy, when after the pressing crack construction completing all target zones, it is not necessary to bore mill bridging plug or wait that the dissolving of solvable pressure break ball can complete the subsequent production of discharge opeing and Oil/gas Well after pressure.

Exemplified as above is only to illustration of the present utility model, is not intended that the restriction to protection domain of the present utility model, every belongs within protection domain of the present utility model with the same or analogous design of this utility model.

Parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.

Claims (9)

  1. null1. a pressure break is with from removing bridging plug,At least include the base (8) being set on central canal (1) from top to bottom、Slips (7)、Support tube (6)、Packing element (4)、Ball seat (3),Also include the upper fracturing plugging ball placed of ball seat (3),Wherein said slips (7) is set in the bottom of support tube (6),It is characterized in that: described support tube (6) is split,Top is upper support tube (6A),Bottom is lower support cylinder (6B),The lower end of described lower support cylinder (6B) is tapered,It is connected to the second destructor (5B) between described lower support cylinder (6B) and described upper support tube (6A),This second destructor (5B) is arranged on slips (7) top,Second destructor (5B) Shi Yige center is with through hole annular seal space,This through hole is for central canal (1) traverse;
    The upper end of described upper support tube (6A) is tapered, on this, support tube (6A) top is connected to the first destructor (5A), the external diameter of this first destructor (5A) and described packing element (4) internal diameter corresponding matching, first destructor (5A) Shi Yige center is with through hole annular seal space, this through hole is for central canal (1) traverse, described first destructor (5A) is identical with the second destructor (5B) structure, is all placed with explosive element in the first destructor (5A) and the second destructor (5B).
  2. 2. a kind of pressure break according to claim 1 is with from removing bridging plug, it is characterized in that: described explosive element is made up of time-delay relay (11), battery (12), explosive (14) and electric cap (13), time-delay relay (11), battery (12) and electric cap (13) form a loop, and electric cap (13) inserts in explosive (14).
  3. 3. a kind of pressure break according to claim 1 is with from removing bridging plug, it is characterised in that: described explosive element is time bomb.
  4. 4. a kind of pressure break according to claim 1 is with from removing bridging plug, it is characterised in that: described base (8) side opening is provided with multiple pin hole (10).
  5. 5. a kind of pressure break according to claim 1 is with from removing bridging plug, it is characterised in that: described packing element (4) is that aluminum core outer wrap rubber peel is made by inside.
  6. 6. a kind of pressure break according to claim 1 is with from removing bridging plug, it is characterised in that: described slips (7) is ceramic material.
  7. 7. a kind of pressure break according to claim 1 is with from removing bridging plug, it is characterised in that: the external diameter of described packing element (4) is less than the external diameter of ball seat (3).
  8. 8. a kind of pressure break according to claim 1 is with from removing bridging plug, it is characterised in that: the external diameter of described base (8) is more than the external diameter of slips (7).
  9. 9. a kind of pressure break according to claim 1 is with from removing bridging plug, it is characterised in that: described ball seat (3) is provided with, near the one end setting pushing cylinder (2), the curved indentations (3A) agreed with fracturing plugging ball.
CN201521125674.0U 2015-12-31 2015-12-31 Fracturing is with removing bridging plug certainly CN205382910U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521125674.0U CN205382910U (en) 2015-12-31 2015-12-31 Fracturing is with removing bridging plug certainly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521125674.0U CN205382910U (en) 2015-12-31 2015-12-31 Fracturing is with removing bridging plug certainly

Publications (1)

Publication Number Publication Date
CN205382910U true CN205382910U (en) 2016-07-13

Family

ID=56338109

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201521125674.0U CN205382910U (en) 2015-12-31 2015-12-31 Fracturing is with removing bridging plug certainly

Country Status (1)

Country Link
CN (1) CN205382910U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105507849A (en) * 2015-12-31 2016-04-20 中国石油天然气股份有限公司 Self-removal bridge plug for fracturing
CN108179991A (en) * 2017-12-18 2018-06-19 中国石油天然气股份有限公司 Bridge plug can be salvaged after a kind of pressure break
CN109138910A (en) * 2018-08-24 2019-01-04 中国石油天然气股份有限公司 A kind of low pump note frictional resistance bridge plug and its application method for horizontal well

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105507849A (en) * 2015-12-31 2016-04-20 中国石油天然气股份有限公司 Self-removal bridge plug for fracturing
CN108179991A (en) * 2017-12-18 2018-06-19 中国石油天然气股份有限公司 Bridge plug can be salvaged after a kind of pressure break
CN108179991B (en) * 2017-12-18 2020-08-07 中国石油天然气股份有限公司 Bridge plug capable of being salvaged after fracturing
CN109138910A (en) * 2018-08-24 2019-01-04 中国石油天然气股份有限公司 A kind of low pump note frictional resistance bridge plug and its application method for horizontal well

Similar Documents

Publication Publication Date Title
US9835003B2 (en) Frac plug
US8443892B2 (en) Fracturing with telescoping members and sealing the annular space
ES2339844T3 (en) FLOATING EQUIPMENT AND ASSOCIATED METHOD.
CA2586327C (en) Well isolation device with disengagable constraint for frangible barrier
US7328750B2 (en) Sealing plug and method for removing same from a well
US7163057B2 (en) Completion apparatus and methods for use in hydrocarbon wells
US8893794B2 (en) Integrated zonal contact and intelligent completion system
US8286697B2 (en) Internally supported perforating gun body for high pressure operations
US20150247372A1 (en) Drag Enhancing Structures for Downhole Operations, and Systems and Methods Including the Same
US8839869B2 (en) Composite reconfigurable tool
AU773907B2 (en) Lateral branch junction for well casing
US20130008671A1 (en) Wellbore plug and method
CN103015955B (en) Open-hole horizontal well multi-cluster sliding sleeve staged fracturing string and fracturing method thereof
CN104278978B (en) Soluble bridge plug fracturing technology pipe string and fracturing method thereof
CA2120108A1 (en) Internally sealable perforable nipple for downhole well applications
CN202544829U (en) Drivepipe sliding sleeve
CA2948027A1 (en) Apparatuses and methods for enabling multistage hydraulic fracturing
CN102071900B (en) Custom-pressure expandable naked eye packer
US10815766B2 (en) Vertical drilling and fracturing methodology
CN202125287U (en) Anchor fluke type sliding sleeve opening tool
US9670750B2 (en) Methods of operating well bore stimulation valves
CN204252969U (en) Sand control pipe and flow string
CN202731865U (en) Switchable fracturing sliding sleeve
CN201531261U (en) Deflagration fracturing device used in cased well
CN104632126B (en) A kind of big orifice bridging plug and its set method

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned
AV01 Patent right actively abandoned

Granted publication date: 20160713

Effective date of abandoning: 20180601