CN114016977A - Well control type suspension sieve tube and well completion process - Google Patents

Well control type suspension sieve tube and well completion process Download PDF

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Publication number
CN114016977A
CN114016977A CN202111274524.6A CN202111274524A CN114016977A CN 114016977 A CN114016977 A CN 114016977A CN 202111274524 A CN202111274524 A CN 202111274524A CN 114016977 A CN114016977 A CN 114016977A
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China
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pressure
well
string
sleeve
pressure control
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CN202111274524.6A
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CN114016977B (en
Inventor
孙崇磊
张建荣
李雷祥
门菲
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Third Drilling Engineering Service Branch Of Cnpc Bohai Drilling Engineering Co ltd
Dezhou Zhongkai Petroleum Technology Co ltd
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Third Drilling Engineering Service Branch Of Cnpc Bohai Drilling Engineering Co ltd
Dezhou Zhongkai Petroleum Technology Co ltd
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Publication of CN114016977A publication Critical patent/CN114016977A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/10Setting of casings, screens, liners or the like in wells
    • E21B43/103Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E21B43/108Expandable screens or perforated liners
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00Valve arrangements for boreholes or wells
    • E21B34/06Valve arrangements for boreholes or wells in wells

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Pipe Accessories (AREA)

Abstract

The application discloses a well control type suspension sieve tube and a well completion process, wherein the horizontal well suspension sieve tube is not used for well cementation and the well completion process, wherein the well control type suspension sieve tube comprises a floating shoe, a sleeve, a floating hoop, a sieve tube string, a pressure control short section, a sleeve string, a tail tube hanger and a feeding drilling tool which are sequentially arranged from bottom to top; the upper end of the casing string is also provided with a top packer, and when the horizontal well is not started, the pressure control nipple has a first working state for blocking the casing string and the screen string; when the horizontal well is started, the pressure control short section has a second working state of communicating the casing string and the screen string. Through the setting of pressure control nipple joint, can effectual packing come from the formation pressure of screen pipe cluster one side to control the pressure differential between casing cluster and the screen pipe cluster, avoid leading to the pressure imbalance between casing cluster and the screen pipe cluster because the fluctuation of formation pressure etc. are unusual, and then avoid again the construction to appear accidents such as blowout, kick when launching the horizontal well.

Description

Well control type suspension sieve tube and well completion process
Technical Field
The invention belongs to the technical field of petroleum drilling and well completion, and particularly relates to a well control type suspension sieve tube and a well completion process.
Background
Most horizontal well completion operations usually adopt a well completion mode of hanging a sieve tube without cementing, and the structure of a tube string comprises a sieve tube string, a casing string, a tail tube hanger and a feeding drilling tool from bottom to top. After completion of the well by the process, the next construction operation is not always carried out immediately. However, in the process that the well is not constructed for a long time due to the suspended screen, the horizontal well is usually waited to be started due to the following factors:
1. the tail pipe is a sieve pipe, and an oil-gas layer is exposed;
2. the drilling team moves home, and no pipe column is arranged in the well;
3. the mud in the well may precipitate, and the hydrostatic column pressure is reduced;
4. great pressure fluctuation of underground stratum and the like
The pressure in the casing is abnormal, the pressure difference between the upper casing and the lower casing in the well is unbalanced, well control risks exist when the horizontal well is used for production operation again, and accidents such as blowout, well kick and the like can occur.
It will thus be seen that the prior art is susceptible to further improvements and enhancements.
Disclosure of Invention
The invention provides a well control type suspension screen pipe and a well completion process, which aim to solve at least one technical problem of the technical problems.
The technical scheme adopted by the invention is as follows:
the invention provides a well control type suspension sieve tube, which is used for a horizontal well suspension sieve tube unfixed well completion process and comprises a float shoe, a sleeve, a float collar, a sieve tube string, a pressure control short section, a sleeve string, a tail tube hanger and a feeding drilling tool which are sequentially arranged from bottom to top; the upper end of the casing string is also provided with a top packer; when the horizontal well is not started, the pressure control short section has a first working state for blocking the casing string and the screen string; when the horizontal well is started, the pressure control short section has a second working state for communicating the casing string and the screen string; a blocking piece is arranged in the pressure control short section and comprises a pressure-bearing rupture disc and a valve assembly which are arranged in the pressure control short section; the valve assembly can move relative to the pressure control short section along the axial direction of the pressure control short section; in a first working state, the blocking piece blocks the inner space of the pressure control short section into two parts which are not communicated with each other, so that the formation pressure from one side of the screen pipe string is blocked; and in a second working state, the blocking piece is released, the pressure control short section is conducted without steps, and the casing string is conducted with the sieve tube string.
As a preferred embodiment of the present invention, the pressure control sub comprises a body, the body comprises an upper joint and a lower joint which are connected with each other, the upper joint is connected with the casing string, and the lower joint is connected with the screen string; the pressure-bearing rupture disc and the valve assembly are arranged in the body; the valve assembly is arranged on one side, facing the sieve tube string, of the pressure-bearing rupture disc.
As a preferred embodiment of the present invention, the valve assembly comprises a valve seat and a one-way valve; the valve seat and the one-way valve are arranged on one side, facing the sieve tube string, of the pressure-bearing rupture disc, and the one-way valve is arranged on one side, close to the sieve tube string, of the valve seat.
As a preferred embodiment of the present invention, the pressure control nipple further includes a sealing sleeve and a supporting sleeve, the sealing sleeve, the valve seat and the supporting sleeve are sequentially disposed inside the body along a well entering direction, and the sealing sleeve, the valve seat and the supporting sleeve can move relative to the body along an axial direction of the body.
As a preferred embodiment of the present invention, a first connecting portion and a second connecting portion are respectively disposed at two ends of the valve seat, the sealing sleeve has a first mating portion corresponding to the first connecting portion, and the supporting sleeve has a second mating portion corresponding to the second connecting portion; the first connecting portion, the second connecting portion with all have fit clearance between the inside wall of body, first cooperation portion with the second cooperation portion sets up respectively in the fit clearance.
As a preferred embodiment of the present invention, the first connecting portion and the second connecting portion each have an external thread, the first mating portion and the second mating portion each have an internal thread, and the first connecting portion and the first mating portion and the second connecting portion and the second mating portion are connected by a thread; the seal cover deviates from one end of the first connecting part and is further provided with a limiting part.
In a preferred embodiment of the present invention, a mounting gap is provided between the first connecting portion and the stopper portion, and the pressure-receiving rupture disc is disposed in the mounting gap.
As a preferred embodiment of the invention, one end of the support sleeve, which is close to the lower joint, adopts a hollow structure, and a connecting hole is formed in the center of the end face of one end of the support sleeve, which is close to the lower joint; the one-way valve comprises a head part and a connecting rod connected with the head part, the connecting rod can penetrate through the connecting hole, and a return spring is sleeved on the connecting rod; two ends of the return spring respectively abut against the hole edge of the connecting hole and the side wall of the head portion, facing one side of the connecting rod.
As a preferred embodiment of the present invention, a side of the head portion away from the connecting rod has a spherical end surface, and an end of the second connecting portion facing the head portion has an arc-shaped fitting portion adapted to the spherical end surface; one side of the rupture disc, facing the limiting portion, is provided with a horizontal end face, one side of the rupture disc, facing the first connecting portion, is provided with an arc-shaped end face, and one end of the first connecting portion, facing the rupture disc, is provided with an inner edge which is at a right angle.
In a second aspect, the present invention further provides a well control suspended screen completion process, which uses the well control suspended screen as described above, and comprises the following steps:
a. drilling: drilling a horizontal well, wherein the horizontal well comprises a vertical section and a horizontal section from top to bottom;
b. putting in a pipe string:
b1. before casing running, a drifting pipe column is put in for thorough drifting, so that smooth well holes of the vertical section and the horizontal section are ensured, and the well wall is stable;
b2. the slurry performance is adjusted, and the casing can be ensured to smoothly fall to the designed depth;
b3. the sleeve and the accessories are put in sequence, and the arrangement sequence of the pipe strings is as follows: a float shoe, a sleeve, a float collar, a screen pipe string, a pressure control short section, a sleeve string, a tail pipe hanger and a feeding drilling tool;
c. sitting and hanging:
c1. the trial hanging is limited by underground conditions, the hydraulic cylinder shear pin can be cut off when the circulating pressure is too high and the ball is not thrown, and the trial hanging can be directly carried out under the condition;
c2. if the trial-sitting hanging is not successful, throwing the ball and pumping at a small displacement; closely watching the change of the pump pressure, keeping the pressure of the ball at 11-12MPa after the ball reaches the inner plug, stabilizing the pressure for 2min, slowly lowering the drilling tool, and successfully sitting and hanging when the total hanging weight is reduced to be equal to the sum of the weight of the drilling tool fed in and the weight of the traveling block;
c3. continuously applying pressure for 10-15t, and checking the sitting and hanging reliability;
d. and (4) reversing: ensuring that the supporting sleeve bears pressure for 5-8t, then positively rotating the supporting sleeve to perform back-off, and when the hanging weight is always equal to the sum of the weights of the upper part feeding drilling tool and the traveling block, indicating that the back-off is performed;
e. setting: slowly lifting the feeding drilling tool to a neutral point, then lifting the feeding drilling tool for 1.5-2m, then lowering the feeding drilling tool, and enabling the top packer to be subjected to pressure of 10-15t, so that the top packer sets an annular space between an upper layer casing and the casing string;
f. the drilling tool is put forward and sent into the drilling tool to wait for the subsequent trial production operation;
g. trial mining:
g1. the wellhead is connected with a pipeline and is connected with a pump truck;
g2. slowly pressurizing the well mouth to enable the pressure-bearing rupture disc to bear pressure and break;
g3. measuring pressure at the wellhead, and judging whether abnormal high pressure exists at the bottom of the well;
g4. releasing pressure at the wellhead;
g5. a special tool is put in to conduct the pressure control short section; connecting a special tool to the front end of a feeding drilling tool and feeding the special tool into a well, and pushing the crushed pressure-bearing rupture disc, the sealing sleeve, the valve seat, the one-way valve and the supporting sleeve to the bottom of the well to realize the step-free conduction in the pressure control short section;
g6. trying to recover oil and gas.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. as a preferred embodiment of the application, the pressure control nipple can effectively seal formation pressure from one side of the screen pipe string, so that the pressure difference between the casing string and the screen pipe string is controlled, pressure imbalance between the casing string and the screen pipe string caused by abnormity of formation pressure fluctuation and the like is avoided, and accidents such as blowout, well kick and the like are avoided when the horizontal well is started through re-construction.
2. As an optimal implementation mode of this application, the cooperation of pressure-bearing rupture disk, one-way valve and valve seat has realized dual separation inside the pressure nipple joint to can effectual separation come from the stratum pressure of screen pipe cluster one side, thereby avoid stratum pressure fluctuation and lead to pressure-bearing rupture disk both sides to appear exceeding its pressure-bearing limit's pressure differential and make pressure-bearing rupture disk rupture in advance, influence subsequent normal construction operation.
3. Compared with the prior art in which the modes of setting a bridge plug in a sleeve or pouring cement and the like are adopted to separate the formation pressure, and the pressure difference of upper and lower sleeves in the well is controlled, the pressure-bearing rupture disc can bear pressure and crush, and the valve assembly can move relative to the pressure control short section, so that the pressure control short section can be conveniently and quickly conducted when the horizontal well is required to be opened for subsequent production operation, the step-free conduction inside the pressure control short section is realized, the step-free conduction between the upper and lower sleeves in the well, such as a screen pipe string and the like, can be realized, the subsequent production operation is facilitated, and the production efficiency is improved.
4. By adopting the well control type suspended sieve tube and the well control type suspended sieve tube well completion process, various abnormal formation pressure problems caused by long-term non-construction operation of the sieve tube suspended well completion can be effectively avoided, well control risks are reduced, and accidents such as blowout, well kick and the like are avoided when a horizontal well is opened for production operation. Meanwhile, the method is favorable for reasonably arranging the operation tasks of construction teams such as exploration, exploitation and the like, avoiding unnecessary extra labor, saving manpower and material resources, and also favorable for planning the development and utilization of oil and gas fields for a long time and avoiding resource waste.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a well-controlled suspended screen;
FIG. 2 is a schematic structural diagram of a pressure control nipple;
FIG. 3 is a schematic diagram of the well-controlled suspended screen in step f.
Wherein the content of the first and second substances,
1, an upper sleeve;
2, horizontal well;
3, a sleeve string;
4, screening pipe string;
5, a pressure control short joint, a 51 upper joint, a 52 lower joint, a 53 pressure-bearing rupture disc, a 531 arc-shaped end face, a 54 valve seat, a 541 first connecting part, a 542 second connecting part, a 543 arc-shaped matching part, a 55 one-way valve, a 551 head, a 552 connecting rod, a 553 resetting spring, a 554 spherical end face, a 56 sealing sleeve, a 561 first matching part, a 57 supporting sleeve, a 571 second matching part, a 58 sealing piece and a 59 sealing groove;
6, feeding the drilling tool;
7 a top packer;
8 liner hanger.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In addition, in the description of the present invention, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1-3, the invention provides a well control type hanging screen pipe and a well completion process, wherein the well control type hanging screen pipe comprises a floating shoe (not shown in the figure), a casing pipe (not shown in the figure), a floating collar (not shown in the figure), a screen pipe string 4, a pressure control short joint 5, a casing string 3, a tail pipe hanger 8 and a feeding drilling tool 6 which are sequentially arranged from bottom to top, and the upper end of the casing string 3 is also provided with a top packer 7. When the horizontal well 2 is not started, the pressure control short section 5 has a first working state of blocking the casing string 3 and the screen string 4; when the horizontal well 2 is started, the pressure control short section 5 has a second working state of communicating the casing string 3 and the screen string 4.
Continuing to refer to fig. 1, a blocking member is arranged inside the pressure control nipple 5, and the blocking member comprises a pressure-bearing rupture disc 53 and a valve assembly which are arranged inside the pressure control nipple 5; the valve assembly can move relative to the pressure control short section 5 along the axial direction of the pressure control short section 5; in a first working state, the blocking piece blocks the inner space of the pressure control short section 5 into two parts which are not communicated with each other, so that the formation pressure from one side of the screen pipe string 4 is blocked; under the second operating condition, the blocking piece is released, the pressure control short section 5 is conducted without steps, and the casing string 3 and the sieve tube string 4 are conducted.
Through the setting of pressure control nipple 5, can effectual packing come from the bottom pressure of one side of screen pipe cluster 4 before horizontal well 2 does not start to the pressure differential between the sleeve pipe of 5 both sides of control pressure control nipple avoids opening horizontal well 2 and carries out well control risks such as formal production operation and appear blowout, kick.
In addition, compared with the prior art that the formation pressure is blocked and the pressure difference between an upper casing and a lower casing in the well is controlled by arranging a bridge plug or cement pouring and the like in the casing, the pressure control nipple 5 in the invention forms double blocking to the formation pressure by arranging the pressure-bearing rupture disc 53 and the valve assembly, the pressure-bearing rupture disc 53 can bear and crush the formation pressure, and the valve assembly can move relative to the pressure control nipple 5, so that the pressure control nipple 5 can be conveniently and quickly conducted when the horizontal well 2 needs to be opened for subsequent production operation, the stepless conduction in the pressure control nipple 5 is realized, namely the stepless conduction between the upper casing and the lower casing in the well, such as the casing string 3, the screen string 4 and the like can be realized, the subsequent production operation is convenient, and the production efficiency is improved.
Further, with continued reference to FIG. 1, the pressure control sub 5 comprises a body comprising an upper sub 51 and a lower sub 52 connected to each other, the upper sub 51 being connected to the casing string 3 and the lower sub 52 being connected to the screen string 4. The pressure-bearing rupture disc 53 and the valve assembly are arranged in the body, and the valve assembly is arranged on one side, facing the sieve tube string 4, of the pressure-bearing rupture disc 53.
The body adopts the split type structure of top connection 51 and 52 combinations of lower clutch, has made things convenient for the installation of pressure-bearing rupture disc 53, valve seat 54 and one-way valve 55 etc. in the body is inside greatly, has reduced the assembly degree of difficulty of 5 inner structures of pressure control nipple joint, promotes assembly efficiency. Adopt split type structure also to make things convenient for to carry out thorough inspection to pressure control nipple joint 5 before the use, reduce pressure control nipple joint 5 and appear the risk of accident such as inefficacy in advance when using to promote well completion efficiency and well completion quality.
In addition, in the practical application process, considering that the structural strength and stability of the valve assembly are higher than those of the pressure-bearing rupture disc 53, the valve assembly is arranged on one side closer to the screen pipe string 4, and the valve assembly can bear more formation pressure before the pressure-bearing rupture disc 53, so that the pressure-bearing rupture disc 53 is prevented from being ruptured in advance due to the fact that the pressure difference exceeding the pressure-bearing limit of the two sides of the pressure-bearing rupture disc 53 is caused by overlarge formation pressure or large fluctuation of the formation pressure, and the subsequent normal construction operation is prevented from being influenced.
In one particular example, and with continued reference to fig. 1, the valve assembly includes a valve seat 54 and a one-way valve 55; the valve seat 54 and the one-way valve 55 are arranged on one side, facing the sieve tube string 4, of the pressure-bearing rupture disc 53, and the one-way valve 55 is arranged on one side, close to the sieve tube string 4, of the valve seat 54.
Further, referring to fig. 1, the pressure control nipple 5 further includes a sealing sleeve 56 and a supporting sleeve 57, the sealing sleeve 56, the valve seat 54 and the supporting sleeve 57 are sequentially disposed inside the body along the well entering direction, and the sealing sleeve 56, the valve seat 54 and the supporting sleeve 57 can move relative to the body along the axial direction of the body.
In a specific example, with continued reference to fig. 1, the valve seat 54 is provided at two ends thereof with a first connecting portion 541 and a second connecting portion 542 respectively, the sealing sleeve 56 has a first mating portion 561 corresponding to the first connecting portion 541, and the supporting sleeve 57 has a second mating portion 571 corresponding to the second connecting portion 542; the first connecting portion 541, the second connecting portion 542 and the inner sidewall of the body have a fitting gap therebetween, and the first fitting portion 561 and the second fitting portion 571 are respectively disposed in the fitting gap. The first connection portion 541 and the second connection portion 542 have external threads, the first mating portion 561 and the second mating portion 571 have internal threads, and the first connection portion 541 and the first mating portion 561 and the second connection portion 542 and the second mating portion 571 are connected by threads. One end of the support sleeve 57 close to the lower joint 52 is of a hollow structure, and a connecting hole is formed in the center of the end face of one end of the support sleeve 57 close to the lower joint 52; the one-way valve 55 comprises a head 551 and a connecting rod 552 connected with the head 551, wherein the connecting rod 552 can pass through the connecting hole, and a return spring 553 is sleeved on the connecting rod 552; the two ends of the return spring 553 respectively abut against the hole edge of the connection hole and the side wall of the head 551 on the side facing the connecting rod 552.
By adopting the structure, the matching connection among the sealing sleeve 56, the valve seat 54 and the supporting sleeve 57 is greatly facilitated, and the sealing sleeve 56, the valve seat 54 and the supporting sleeve 57 are prevented from being fixedly connected by additionally arranging a connecting piece, so that the stepless conduction in the whole pipe column structure is realized after the pressure control pup joint 5 is conducted.
In addition, through the setting of seal cover 56 and support cover 57, can be with seal cover 56, pressure-bearing rupture disc 53, valve seat 54, one-way valve 55 and support cover 57 just make up into a whole before the assembly goes into the body inside, the split type structural design of cooperation body, the holistic assembly efficiency of pressure control nipple joint 5 in this application has further been promoted, also made things convenient for simultaneously when needing to switch on pressure control nipple joint 5 with seal cover 56, pressure-bearing rupture disc 53, valve seat 54, one-way valve 55 and support cover 57 wholly totally release from the body inside, promote completion efficiency.
It should be noted that the matching connection manner among the sealing sleeve 56, the valve seat 54 and the supporting sleeve 57 in the present application is not limited to the above example, and the above is only one preferred embodiment of the present application, and the matching connection manner may also be performed by a snap connection, a bolt connection, and the like, and the present application is not limited thereto.
As a preferred embodiment of the present application, referring to fig. 1, one end of the sealing sleeve 56 away from the first connection portion 541 further has a limiting portion, an installation gap is provided between the first connection portion 541 and the limiting portion, and the pressure-bearing rupture disc 53 is disposed in the installation gap.
In a preferred example, and with continued reference to FIG. 1, the side of the head 551 remote from the connecting rod 552 has a spherical end surface 554, and the end of the second connecting portion 542 facing the head 551 has an arcuate mating portion 543 that conforms to the spherical end surface 554; one side of the rupture disc facing the first connection portion 541 has an arc-shaped end surface 531, and one end of the first connection portion 541 facing the rupture disc has an inner edge at a right angle.
The arrangement of the spherical end surface 554 and the arc-shaped matching part 543 enlarges the matching area between the head 551 and the second connecting part 542, thereby being beneficial to improving the sealing performance between the two parts and further improving the blocking effect on the formation pressure at one side of the screen pipe string 4. When this horizontal well 2 is launched, need carry out oil recovery, when the gas production operation, constructor suppresses at the well head, make the rupture disc pressure-bearing in the well, the arc terminal surface 531 of rupture disc orientation one side of first connecting portion 541 can the contact of first connecting portion 541 tip be the right angled inward flange and form the stress concentration point, thereby make the rupture disc quick breakage under the pressure effect, convenient follow-up measurement and other production operation to pressure in the well, and the arc terminal surface 531 of rupture disc orientation one side of first connecting portion 541 then can the at the axial pressure-bearing of at the maximum degree, further promote the crushing efficiency of rupture disc, make things convenient for follow-up measurement and other production operations to pressure in the well.
It should also be noted that the structure of the pressure-receiving rupture disk 53 and the structure of the first connection portion 541 in the present application are not limited to the above-mentioned examples, and the structure shown in fig. 1 in the above-mentioned examples may be adopted, or other structures may be adopted, for example, the pressure-receiving rupture disk 53 may be a disk shape as a whole, and the end portion of the first connection portion 541 may be provided in a pointed shape as it is. This is not specifically limited in the present application
In a preferred embodiment of the present application, and with continued reference to the figures, seals 58 are provided between the upper and lower fittings 51, 52, between the lower fitting 52 and the support sleeve 57, and between the sealing sleeve 56 and the pressure rupture disc 53. In a specific example, as shown in the figure, the sealing element 58 is a plurality of annular sealing rubber rings, a sealing groove 59 is formed on a side wall of one end of the lower joint 52 connected with the upper joint 51, a sealing groove 59 is formed on a side wall of the connecting part facing the body, a sealing groove 59 is formed on an inner side wall of the sealing sleeve 56 and the pressure-bearing rupture disc 53 which are matched with each other, and the plurality of annular sealing rubber rings are respectively arranged in the sealing groove 59.
The sealing element 58 ensures the sealing performance inside the pressure control pup joint 5, and can further prevent the formation pressure from one side of the screen pipe string 4 from seeping out through the matching gap between the body, the sealing sleeve 56, the valve seat 54 and the pressure-bearing rupture disc 53, so that the pressure difference between the casing string 3 and the screen pipe string 4 can be better controlled, and the well control risk is reduced.
It should be noted that, in the present application, the specific structure and the arrangement manner of the sealing element 58 are not specifically limited, and the scheme of providing the sealing groove 59 and the annular sealing rubber ring in the above example may be adopted, or a sealing material other than the annular sealing rubber ring, such as nylon, may also be adopted, or other forms of the sealing element 58 and the sealing structure, such as a sealing gasket, may also be adopted.
Furthermore, the application also provides a well control type suspended screen pipe well completion process applying the well control type suspended screen pipe, which comprises the following steps:
a. drilling: drilling a horizontal well 2, wherein the horizontal well 2 comprises a vertical section and a horizontal section from top to bottom;
b. putting in a pipe string:
b1. before casing running, a drifting pipe column is put in for thorough drifting, so that smooth well holes of the vertical section and the horizontal section are ensured, and the well wall is stable;
b2. the slurry performance is adjusted, and the casing can be ensured to smoothly fall to the designed depth;
b3. the sleeve and the accessories are put in sequence, and the arrangement sequence of the pipe strings is as follows: the device comprises a floating shoe, a sleeve, a floating hoop, a sieve tube string 4, a pressure control short section 5, a sleeve string 3, a tail tube hanger 8 and a feeding drilling tool 6;
c. sitting and hanging:
c1. the trial hanging is limited by downhole conditions, sometimes the circulating pressure is too high, and a hydraulic cylinder shear pin (not shown in the figure) can be cut off without throwing a ball, and under the condition, the trial hanging can be directly carried out;
c2. if the trial-sitting hanging is not successful, throwing the ball and pumping at a small displacement; closely watching the change of the pump pressure, keeping the pressure at 11-12MPa after the ball reaches an inner plug (not shown in the figure), stabilizing the pressure for 2min, slowly lowering the drilling tool, and successfully sitting and hanging when the total hanging weight is reduced to be equal to the sum of the weight of the drilling tool 6 and the weight of a traveling block (not shown in the figure);
c3. continuously applying pressure for 10-15t, and checking the sitting and hanging reliability;
d. and (4) reversing: ensuring that the supporting sleeve 57 bears the pressure for 5-8t, then positively rotating the supporting sleeve 57 to perform back-off, and when the hanging weight is always equal to the sum of the weights of the upper part feeding drilling tool 6 and the traveling block, indicating that the back-off is opened;
e. setting: slowly lifting the feeding drilling tool 6 to a neutral point, then lifting the feeding drilling tool 6 for 1.5-2m, then lowering the feeding drilling tool 6, and enabling the top packer 7 to be subjected to pressure of 10-15t, so that the top packer 7 sets an annular space between the upper-layer casing 1 and the casing string 3;
f. the drilling tool 6 is put forward to wait for the subsequent trial production operation;
g. trial mining:
g1. a wellhead access pipeline connected with a pump truck (not shown in the figure);
g2. the well mouth is slowly pressed, so that the pressure-bearing rupture disc 53 is crushed in a pressure-bearing manner;
g3. measuring pressure at the wellhead, and judging whether abnormal high pressure exists at the bottom of the well;
g4. releasing pressure at the wellhead;
g5. a special tool (not shown in the figure) is put in to conduct the pressure control short joint 5; connecting a special tool to the front end of the feeding drilling tool 6 and feeding the special tool into a well, pushing the crushed pressure-bearing rupture disc 53, a sealing sleeve 56, a valve seat 54, a one-way valve 55, a supporting sleeve 57 and the like to the bottom of the well, and realizing the step-free conduction in the pressure control pup joint 5;
g6. trying to recover oil and gas.
By adopting the well control type suspended sieve tube and the well control type suspended sieve tube well completion process, various abnormal formation pressure problems caused by long-term non-construction operation of the sieve tube suspended well completion can be effectively avoided, and well control risks are reduced, so that accidents such as blowout, well kick and the like are avoided when the horizontal well 2 is opened for production operation. Meanwhile, the development and utilization of oil and gas fields are conveniently planned for a long time, and resource waste is avoided.
The method can be realized by adopting or referring to the prior art in places which are not described in the invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A well control type suspension sieve tube is used for a horizontal well suspension sieve tube unfixed well completion process and is characterized in that,
the device comprises a float shoe, a sleeve, a float collar, a screen pipe string, a pressure control short section, a sleeve string, a tail pipe hanger and a feeding drilling tool which are sequentially arranged from bottom to top; the upper end of the casing string is also provided with a top packer;
when the horizontal well is not started, the pressure control short section has a first working state for blocking the casing string and the screen string; when the horizontal well is started, the pressure control short section has a second working state for communicating the casing string and the screen string;
a blocking piece is arranged in the pressure control short section and comprises a pressure-bearing rupture disc and a valve assembly which are arranged in the pressure control short section; the valve assembly can move relative to the pressure control short section along the axial direction of the pressure control short section;
in a first working state, the blocking piece blocks the inner space of the pressure control short section into two parts which are not communicated with each other, so that the formation pressure from one side of the screen pipe string is blocked; and in a second working state, the blocking piece is released, the pressure control short section is conducted without steps, and the casing string is conducted with the sieve tube string.
2. The well-controlled suspended screen of claim 1, wherein the pressure control sub comprises a body including an upper sub and a lower sub connected to each other, the upper sub being connected to the casing string and the lower sub being connected to the screen string;
the pressure-bearing rupture disc and the valve assembly are arranged in the body; the valve assembly is arranged on one side, facing the sieve tube string, of the pressure-bearing rupture disc.
3. The well-controlled suspension screen as recited in claim 2 wherein the valve assembly comprises a valve seat and a one-way valve; the valve seat and the one-way valve are arranged on one side, facing the sieve tube string, of the pressure-bearing rupture disc, and the one-way valve is arranged on one side, close to the sieve tube string, of the valve seat.
4. The well-controlled suspended screen of claim 3, wherein the pressure control sub further comprises a sealing sleeve and a support sleeve, the sealing sleeve, the valve seat and the support sleeve are sequentially disposed inside the body in the direction of entry, and the sealing sleeve, the valve seat and the support sleeve are capable of moving relative to the body in the axial direction of the body.
5. The well-controlled suspended screen of claim 4, wherein the valve seat has a first connection portion and a second connection portion at opposite ends thereof, the sealing sleeve has a first engagement portion corresponding to the first connection portion, and the support sleeve has a second engagement portion corresponding to the second connection portion; the first connecting portion, the second connecting portion with all have fit clearance between the inside wall of body, first cooperation portion with the second cooperation portion sets up respectively in the fit clearance.
6. The well-controlled suspended screen of claim 5, wherein the first and second connection portions each have external threads, the first and second mating portions each have internal threads, and the first and second connection portions and the second mating portions are each threadedly connected; the seal cover deviates from one end of the first connecting part and is further provided with a limiting part.
7. The well-controlled suspension screen of claim 6, wherein the first connection portion and the retention portion have a mounting gap therebetween, and the pressure-bearing rupture disc is disposed in the mounting gap.
8. The well-controlled suspended screen pipe as recited in claim 6, wherein the supporting sleeve has a hollowed-out structure at one end close to the lower joint, and a connecting hole is formed in the supporting sleeve at the center of the end face of one end close to the lower joint; the one-way valve comprises a head part and a connecting rod connected with the head part, the connecting rod can penetrate through the connecting hole, and a return spring is sleeved on the connecting rod; two ends of the return spring respectively abut against the hole edge of the connecting hole and the side wall of the head portion, facing one side of the connecting rod.
9. The well-controlled suspension screen of claim 8, wherein the head portion has a spherical end surface on a side thereof remote from the connector rods, and the second connector portion has an arcuate engagement portion corresponding to the spherical end surface on an end thereof facing the head portion; one side of the rupture disc, facing the limiting portion, is provided with a horizontal end face, one side of the rupture disc, facing the first connecting portion, is provided with an arc-shaped end face, and one end of the first connecting portion, facing the rupture disc, is provided with an inner edge which is at a right angle.
10. A well-control suspended screen completion process, wherein the well-control suspended screen according to any of claims 1-9 is applied, comprising the steps of:
a. drilling: drilling a horizontal well, wherein the horizontal well comprises a vertical section and a horizontal section from top to bottom;
b. putting in a pipe string:
b1. before casing running, a drifting pipe column is put in for thorough drifting, so that smooth well holes of the vertical section and the horizontal section are ensured, and the well wall is stable;
b2. the slurry performance is adjusted, and the casing can be ensured to smoothly fall to the designed depth;
b3. the sleeve and the accessories are put in sequence, and the arrangement sequence of the pipe strings is as follows: a float shoe, a sleeve, a float collar, a screen pipe string, a pressure control short section, a sleeve string, a tail pipe hanger and a feeding drilling tool;
c. sitting and hanging:
c1. the trial hanging is limited by underground conditions, the hydraulic cylinder shear pin can be cut off when the circulating pressure is too high and the ball is not thrown, and the trial hanging can be directly carried out under the condition;
c2. if the trial-sitting hanging is not successful, throwing the ball and pumping at a small displacement; closely watching the change of the pump pressure, keeping the pressure of the ball at 11-12MPa after the ball reaches the inner plug, stabilizing the pressure for 2min, slowly lowering the drilling tool, and successfully sitting and hanging when the total hanging weight is reduced to be equal to the sum of the weight of the drilling tool fed in and the weight of the traveling block;
c3. continuously applying pressure for 10-15t, and checking the sitting and hanging reliability;
d. and (4) reversing: ensuring that the supporting sleeve bears pressure for 5-8t, then positively rotating the supporting sleeve to perform back-off, and when the hanging weight is always equal to the sum of the weights of the upper part feeding drilling tool and the traveling block, indicating that the back-off is performed;
e. setting: slowly lifting the feeding drilling tool to a neutral point, then lifting the feeding drilling tool for 1.5-2m, then lowering the feeding drilling tool, and enabling the top packer to be subjected to pressure of 10-15t, so that the top packer sets an annular space between an upper layer casing and the casing string;
f. the drilling tool is put forward and sent into the drilling tool to wait for the subsequent trial production operation;
g. trial mining:
g1. the wellhead is connected with a pipeline and is connected with a pump truck;
g2. slowly pressurizing the well mouth to enable the pressure-bearing rupture disc to bear pressure and break;
g3. measuring pressure at the wellhead, and judging whether abnormal high pressure exists at the bottom of the well;
g4. releasing pressure at the wellhead;
g5. a special tool is put in to conduct the pressure control short section; connecting a special tool to the front end of a feeding drilling tool and feeding the special tool into a well, and pushing the crushed pressure-bearing rupture disc, the sealing sleeve, the valve seat, the one-way valve and the supporting sleeve to the bottom of the well to realize the step-free conduction in the pressure control short section;
g6. trying to recover oil and gas.
CN202111274524.6A 2021-10-29 2021-10-29 Well control type hanging screen pipe and well completion process Active CN114016977B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101122220A (en) * 2007-09-21 2008-02-13 中国石油天然气集团公司 Swelling type screen pipe suspension method and swelling type screen pipe hanger
CN201412095Y (en) * 2009-06-02 2010-02-24 中国石油化工股份有限公司 Two-way well flushing valve for horizontal well
US20140262207A1 (en) * 2013-02-15 2014-09-18 Halliburton Energy Services, Inc Ball check valve integration to icd
CN204283397U (en) * 2014-11-27 2015-04-22 中国石油天然气股份有限公司 Auto-oscillation type spiral gas and sand anchor
CN208203213U (en) * 2018-04-16 2018-12-07 中国石油集团西部钻探工程有限公司 The pipe string of tail tube hanging half way well cementation
WO2019085472A1 (en) * 2017-11-03 2019-05-09 中国海洋石油集团有限公司 Tubular column for drill-free and catch-free integrated well cementing and well completion and application thereof
CN112814640A (en) * 2021-02-22 2021-05-18 山西蓝焰煤层气工程研究有限责任公司 Multi-layer under-pressure fracturing operation device for medium-low pressure well and application method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101122220A (en) * 2007-09-21 2008-02-13 中国石油天然气集团公司 Swelling type screen pipe suspension method and swelling type screen pipe hanger
CN201412095Y (en) * 2009-06-02 2010-02-24 中国石油化工股份有限公司 Two-way well flushing valve for horizontal well
US20140262207A1 (en) * 2013-02-15 2014-09-18 Halliburton Energy Services, Inc Ball check valve integration to icd
CN204283397U (en) * 2014-11-27 2015-04-22 中国石油天然气股份有限公司 Auto-oscillation type spiral gas and sand anchor
WO2019085472A1 (en) * 2017-11-03 2019-05-09 中国海洋石油集团有限公司 Tubular column for drill-free and catch-free integrated well cementing and well completion and application thereof
CN208203213U (en) * 2018-04-16 2018-12-07 中国石油集团西部钻探工程有限公司 The pipe string of tail tube hanging half way well cementation
CN112814640A (en) * 2021-02-22 2021-05-18 山西蓝焰煤层气工程研究有限责任公司 Multi-layer under-pressure fracturing operation device for medium-low pressure well and application method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
代永波;袁赞兵;: "(尾管+筛管)悬挂+油套固井工艺在水平井的应用", 中国石油和化工标准与质量, no. 18, 25 September 2013 (2013-09-25) *
郑晓志;陈志峰;阮臣良;张元星;刘国祥;: "封隔尾管悬挂器内插管完井方案及应用", 石油矿场机械, no. 06, 25 June 2010 (2010-06-25) *

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