Mechanical water-seeking pipe string and water-seeking method for multi-stage fracturing horizontal well with casing completion
A technology for finding water strings and horizontal wells, which is applied in the direction of casing, wellbore/well components, drill pipes, etc., and can solve the problems of string sealing, easy peristalsis of strings, and difficulties in unsealing Y441 two-way slip packers, etc. problems, to achieve the effect of safe and reliable process and simple process
Active Publication Date: 2017-10-17
PETROCHINA CO LTD
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, because most of the high water cut and water flooded horizontal wells have severe scaling, after the hydraulic packer is set, the piston and sucker rod of the rod oil production pump cannot be smoothly lowered into the pump barrel, and the Y441 two-way slip packer is in the horizontal It is difficult to unseal the section; if the Y341 packer is used alone, the tubing string will easily wriggle during the swabbing process, which will affect the sealing of the tubing string
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0012] Reference figure 1 To further illustrate the embodiments of the present invention:
[0013] The plug 1 at the end of the water-finding pipe string is connected to the first smart switch 2, the first Y341 hydraulic packer 3, the second smart switch 4, and the second Y341 located in the horizontal section of the horizontal well through the oil pipe 9 upwards. The hydraulic packer 5, the third smart switch 6, the third Y341 hydraulic packer 7 and the fourth smart switch 8, the upper part of the fourth smart switch 8 is connected to the vertical section of the horizontal well through the tubing 9 The Y221 mechanical packer 10 and the Y221 mechanical packer 10 are connected to the screen pipe 11, the whole barrel pump 12 and the sucker rod 13 arranged in the oil pipe 9 in order upwards.
[0014] The functions of each component of this water pipe string are as follows:
[0015] The oil pipe 9 is used to connect the string tool string; the Y341 hydraulic packers arranged between th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a mechanical water-finding pipe string and a water-finding method for multi-stage fracturing horizontal wells completed with casing and is designed for ensuring water control and oil-increasing measures of the horizontal well. The water-seeking string is composed of plugs, intelligent switches, Y341 hydraulic packers, Y221 mechanical packers, screens, pumps and sucker rods, and is assembled into the well and set through the string. Packer, segmental water search and string extraction are operated. Each hydraulic packer in this pipe string can effectively seal off the oil casing annulus, the mechanical packer can anchor the pipe string, each intelligent switch can realize the layered production of each layer, and the screen can measure each Stratified liquid surface. The water finding pipe string of the present invention can realize the completion of the construction pipe string and the production pipe string at one time, the process is simple, safe and reliable, and the production capacity, pressure and temperature test of each section of the horizontal well can be completed in one trip of the pipe string, and the water outlet section and water outlet can be defined The flow rate provides a reliable basis for the water control and oil enhancement measures of horizontal wells.
Description
Technical field [0001] The invention relates to a mechanical water-finding pipe string for a multi-stage fractured horizontal well with casing well completion and a water-finding method thereof, and belongs to the technical field of oil production in oil fields. Background technique [0002] The use of horizontal wells to exploit low-permeability oil fields can greatly improve the development effect and increase the recovery rate. Horizontal wells have longer completion intervals than vertical wells. The output of oil wells can be increased by expanding the drainage area of the oil layer, which can reach more than three times the output of vertical wells. However, due to the complex and changeable wellbore trajectory and injection-production well pattern of horizontal wells, the lithology, physical properties and properties of reservoir fluids of each oil layer are different, which makes the water absorption capacity, waterline advance speed and production rate of horizontal we...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00E21B47/10E21B43/00
Inventor 朱洪征甘庆明吕亿明牛彩云李大建王百赵晓伟
Owner PETROCHINA CO LTD