Method for injecting injection fluid by outside-tube chemical packer
A packer and injection fluid technology, applied in sealing/isolation, earthwork drilling, wellbore/well components, etc., can solve problems such as inability to ensure the injection quality and precise quantitative injection of chemical agents and displacement fluids, and achieve structural Reasonable, easy to use, and the effect of improving injection quality
Active Publication Date: 2014-01-01
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0003] The present invention provides a method for injecting liquid into an external chemical packer, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the existing injection liquid injection device cannot ensure the injection quality and precise quantitative injection of chemical agents and displacement liquids the problem
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[0023] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.
[0024] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:
[0025] as attached Figures 1 to 6 As shown, the extra-pipe chemical packer injection fluid injection method first sets a two-stage spanning packer 15 in the annular cavity between the horizontal pipe string 13 and the horizontal screen 14 located outside the horizontal pipe string 13, There is a gap in the middle of the setting double-stage span packer 15, and an opening valve 16 capable of communicating with the inside and outside of the horizontal string 13 is installed in the horizontal pipe string 13 corresponding to the gap, and a communication valve 16 is installed in the screen pipe 14 corresponding to the gap. The liquid outlet holes inside...
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The invention relates to the technical field of annulus chemical plugging outside a horizontal well sieve tube of oil filed, in particular to a method for injecting injection fluid by outside-tube chemical packer, comprising the following steps: firstly, a two-stage straddle packer is set in the annulus cavity between a horizontal pillar and the horizontal sieve tube which is positioned outside the horizontal pillar, a gap is arranged in the middle of the set two-stage straddle packer, an open and close valve capable of communicating the inside and the outside of the horizontal tube pillar is installed in the horizontal tube pillar corresponding to the gap, a liquid outlet hole communicating the inside and the outside of the sieve tube is arranged on the sieve tube corresponding to the gap, and the plug is installed on the right end of the horizontal tube pillar; chemical agent and displacing liquid after being mixed are pushed by a pump truck to enter into the horizontal tube pillar. The invention has reasonable and compact structure and convenient use, the chemical agent and displacing liquid are separated from flushing fluid and kill mud by at least one group of sealing rubber plug so as to realize no magma and no residua on tube wall during pump injection, thereby greatly improving the injection quality of the chemical agent and displacing liquid and injecting accurately and quantitatively.
Description
1. Technical field [0001] The invention relates to the technical field of chemical plugging of the outer annulus of horizontal well screen pipes in oil fields, and relates to a method for injecting liquid into chemical packers outside the pipe. 2. Background technology [0002] The extra-pipe chemical packer injection technology is used to fill one or more sections of thixotropic material in the outer annulus of horizontal well screens in oilfields to form sections or plugs outside the pipe, which is used for staged oil production, water search, water blocking, and compression. Cracking acidification, testing, etc. provide conditions. At present, the chemical packer injection technology outside the pipe has mixed slurry and residues on the pipe wall during pumping, so the injection quality and precise quantitative injection of chemical agents and displacement fluids cannot be guaranteed. 3. Contents of the invention [0003] The invention provides a method for injecting l...
Claims
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IPC IPC(8): E21B33/12
Inventor 谢斌李德龙邓伟斌
Owner BC P INC CHINA NAT PETROLEUM CORP