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CN-122014166-A - Intelligent water shutoff screen pipe completion string combination and use method thereof

CN122014166ACN 122014166 ACN122014166 ACN 122014166ACN-122014166-A

Abstract

The invention discloses an intelligent water shutoff screen pipe completion pipe column combination and a use method thereof, the well completion pipe column combination comprises a well completion pipe column and an inner screen pipe unlocking pipe column, the well completion pipe column comprises a sleeve, a plurality of screen pipe components and a first packer which is arranged between adjacent screen pipe components and swells when meeting water, the screen pipe components comprise an outer screen pipe with outer screen holes and an inner screen pipe with inner screen holes, the inner screen pipe and the outer screen pipe are fixed through screen pipe pins, the inner screen pipe and the outer screen pipe are aligned with each other, a first groove body and a second clamping groove are arranged on the inner screen pipe, the inner screen pipe unlocking pipe column comprises an oil pipe and an unlocking piece, the unlocking piece can be locked with the first groove body and the second groove body, and the inner screen pipe is driven to move to a closing position where the inner screen holes and the outer screen holes are staggered through the inner screen pipe unlocking pipe column. When the wellhead is out of water, the inner screen pipe is thrown to unlock the pipe column, the outer screen holes are plugged, and fixed-point water plugging of the screen pipe is realized.

Inventors

  • ZHANG CHONG
  • YANG JING
  • QIN XU
  • MA YANCHAO
  • MIAO MINGMING
  • GAO HANG

Assignees

  • 中国石油化工股份有限公司
  • 中国石油化工股份有限公司东北油气分公司

Dates

Publication Date
20260512
Application Date
20241112

Claims (10)

  1. 1. The utility model provides an intelligence water shutoff screen pipe completion tubular column combination, its characterized in that, including completion tubular column and inlayer screen pipe unblock tubular column, completion tubular column includes sleeve pipe (1), a plurality of screen pipe subassembly (6) and sets up first packer (7) of water swelling formula between adjacent screen pipe subassembly (6), screen pipe subassembly (6) including outer screen pipe (601) that have inlayer screen hole (6051) and inlayer screen pipe (602) that have inlayer screen hole (6052), inlayer screen pipe (602) with outer screen pipe (601) are fixed through screen pipe pin (604) and inlayer screen hole (6052) with outer screen hole (6051) are aligned each other, be provided with first cell body (606) and second cell body (607) on inlayer screen pipe (602), inlayer screen pipe unblock tubular column includes oil pipe (14) and unlocking piece (10), unlocking piece (10) can with first cell body (606) with inlayer screen pipe (6052) are in order to pass through inlayer screen pipe (602) removal to inlayer screen hole (6052) is moved to inlayer screen hole (6051) closes the position.
  2. 2. The intelligent water screen completion string assembly of claim 1 wherein the inner screen (602) is provided with axially extending slips (609) and the outer screen (601) is provided with a slip slot (603) receiving the slips (609).
  3. 3. The intelligent water screen completion string assembly of claim 2 wherein the end of the outer screen (601) is provided with a spring retainer (608), the spring retainer (608) being capable of limiting axial movement of the inner screen (602) away from the closed position.
  4. 4. A smart water screen completion string combination as claimed in claim 3 wherein the inner screen (602) comprises a bottom inner screen (6023), a middle inner screen (6022) and a top inner screen (6021).
  5. 5. The intelligent water screen completion string assembly of claim 4 wherein the unlocking member (10) comprises a chamfer (103) disposed at a lower end, a slot (104) disposed in a middle portion, a first unlocking tooth (101) and a second unlocking tooth (102) disposed on an outer periphery.
  6. 6. The intelligent water plugging screen well completion string combination of claim 5, wherein the well completion string comprises a guide shoe (8), the screen assembly (6), a blind plate (5), a second packer (4) with a bulge seal, and a grading collar (3) which are sequentially arranged from bottom to top.
  7. 7. The intelligent water plugging screen well completion string combination according to claim 6, wherein the inner screen unlocking string comprises an unlocking piece (10), a threaded connecting piece (11), a releasing device (12) and a reducer union (13) which are sequentially arranged from bottom to top.
  8. 8. The intelligent water screen completion string combination of claim 7, wherein the release device comprises a release base (122), a clamping portion (121) connected to the release base (122) through a release pin (123), the release base (122) having a through hole that can be plugged by a soluble ball (125), the clamping portion (121) being partially received in a third slot (124) of the release base (122).
  9. 9. The intelligent water screen completion string combination of claim 8 wherein the release base (122), the threaded connection (11) and the unlocking member (10) are made of a soluble material.
  10. 10. A method of using the intelligent water screen completion string assembly of any of claims 1-9, comprising: Setting the well completion pipe string, cementing well and starting production; when water starts to be discharged from one screen pipe assembly (6), the inner screen pipe unlocking pipe column is put in, so that the unlocking piece (10) reaches the screen pipe assembly (6) at the water discharge position, and the unlocking piece (10) is locked with the inner screen pipe (602); Lifting the inner screen unlocking string to allow the inner screen (602) to reach the closed position, thereby plugging the water outlet section.

Description

Intelligent water shutoff screen pipe completion string combination and use method thereof Technical Field The invention relates to the technical field of oil and gas reservoir development, in particular to an intelligent water shutoff screen pipe completion string combination and a use method thereof. Background The screen pipe well completion of the horizontal well has the advantages of low cost, small pollution, large oil drainage area and the like, and is a main well completion mode of the horizontal well. With the continuous deep exploitation of oil and gas fields, formation water discharge phenomenon often occurs after the oil and gas well is produced for a period of time, and if effective water blocking measures are not adopted, the productivity of the oil and gas well can be rapidly reduced, and even water flooding is stopped. Thus, plugging of oil and gas wells is an important task in the development of oil and gas fields. At present, the mechanical water plugging of the oil and gas well is mainly applied to a casing completion pipe column, a water plugging pipe column tool is sent into a water outlet position underground through a continuous oil pipe for multiple times, and then plugging operation is carried out, so that the construction process is complex, and the construction period is long. In addition, the inner diameter of a common water shutoff pipe column tool is 56mm, the size is small, and full-diameter production cannot be realized. The water plugging difficulty of the screen pipe well completion horizontal well is that the mechanical plugging method can only realize the plugging of the inner space of the screen pipe, can not seal the annular space between the screen pipe and the well wall, the fixed-point mechanical water plugging of the screen pipe well completion can not be realized in the prior art, most of the screen pipe well completion water plugging processes mainly adopt chemical water plugging, the reservoir protection is not facilitated, and meanwhile, the long-term reliability is weak. Therefore, the design of the water shutoff tool which can realize the full diameter, has simple construction process, is safe and reliable and has very important significance. Disclosure of Invention The invention aims to solve the technical problem that fixed-point mechanical water shutoff of screen pipe well completion cannot be realized in the prior art. To achieve the above object, in one aspect, the present invention provides an intelligent water shutoff screen completion string combination, which includes a completion string and an inner screen unlocking string, the completion string including a casing, a plurality of screen assemblies, and a first packer that is provided between adjacent screen assemblies and swells in water, the screen assemblies including an outer screen having an outer screen opening and an inner screen having an inner screen opening, the inner screen and the outer screen being fixed by screen pins and the inner screen opening and the outer screen opening being aligned with each other, the inner screen being provided with a first slot and a second slot, the inner screen unlocking string including an oil pipe and an unlocking member, the unlocking member being lockable with the first slot and the second slot to drive the inner screen to move to a closed position in which the inner screen opening and the outer screen are staggered by the inner screen unlocking string. In some embodiments, the inner screen is provided with an axially extending slide bar and the outer screen is provided with a slide channel for receiving the slide bar. In some embodiments, the end of the outer screen is provided with a spring retainer that can limit axial movement of the inner screen away from the closed position. In some embodiments, the inner screen comprises a bottom inner screen, a middle inner screen, and a top inner screen. In some embodiments, the unlocking member includes a chamfer provided at a lower end, a slit provided at a middle portion, a first unlocking tooth and a second unlocking tooth provided on an outer circumference. In some embodiments, the completion string includes a shoe, the screen assembly, a blind plate, a second packer that is swaged to a swelling seal, and a sizing collar sequentially disposed from bottom to top. In some embodiments, the inner screen unlocking string comprises the unlocking piece, a threaded connecting piece, a releasing device and a reducing joint which are arranged in sequence from bottom to top. In some embodiments, the release device comprises a release base having a through hole that can be plugged by a soluble ball, a snap-fit portion connected to the release base by a release pin, the snap-fit portion being partially received in a third groove of the release base. In some embodiments, the release base, the threaded connection, and the unlocking member are made of a soluble material. The second aspect of the invention provides a method