Pressure Testing for Downhole Fluid Injection Systems
First Claim
1. A pressure test system for a wellbore, the pressure test system comprising:
- a sump housing having first and second flow passages and a bypass channel connecting the first and second flow passages; and
a sump cavity adjacent to and in fluid communication with the first flow passage; and
a shear plug assembly including a plug body and a shear element radially extending from the plug body.
1 Assignment
0 Petitions
Accused Products
Abstract
A pressure test system for use in downhole fluid injection includes a shear plug assembly disposed along a flow path defined in a sump housing. The sump housing also includes a sump cavity positioned downstream of the shear plug assembly. A shear element of the shear plug assembly secures the shear plug assembly in a first position within the flow path, so that the shear plug assembly blocks fluid flow through the sump housing. Following a pressure test, fluid pressure on the shear plug assembly may be increased until the shear element of the shear plug assembly shears, after which, the pressurized fluid drives the shear plug assembly into the sump cavity, permitting flow to bypass the sump cavity through bypass channels. The bypass channels and other flow paths may be arranged to function as a pressure wave muffler in order to protect pressure sensitive components after shear out.
6 Citations
20 Claims
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1. A pressure test system for a wellbore, the pressure test system comprising:
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a sump housing having first and second flow passages and a bypass channel connecting the first and second flow passages; and
a sump cavity adjacent to and in fluid communication with the first flow passage; anda shear plug assembly including a plug body and a shear element radially extending from the plug body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A wellbore system for introducing chemicals therein, the system comprising:
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a pipe string; a completion assembly in fluid communication with the pipe string; a mandrel interconnected with the pipe string, the mandrel having an injection port; a fluid injection valve assembly comprising pressure test system, a check valve and a flow passage in fluid communication with the injection port; a chemical injection line in fluid communication with the pressure test system; wherein the pressure test system comprises; a sump housing having a first end with a first flow passage, wherein the first flow passage has a first diameter and a second diameter smaller than the first diameter so as to form a sump housing shoulder at the intersection of the first and second diameters;
a second flow passage separate from the first flow passage;
a bypass channel connecting the first and second flow passages, wherein the bypass channel intersect the first flow passage at a port and the sump cavity is formed along the first flow passage between the port and the second flow passage; and
a sump cavity adjacent to and in fluid communication with the first flow passage; anda shear plug assembly including a plug body having a first portion with a first diameter and a second portion with a second diameter, one diameter being larger than the other diameter so as to form a plug shoulder at the intersection of the first and second portions;
a radially extending shear flange positioned at the plug shoulder; and
a seal element disposed along the plug body portion having the larger diameter. - View Dependent Claims (15, 16, 17, 18)
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19. A method for injecting chemicals into a wellbore, the method comprising:
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positioning a fluid injection system in a wellbore at a desired location; introducing a fluid into the fluid injection system; utilizing a shear plug to block flow into flow ports and through the fluid injection system; applying a first pressure to the fluid to test the integrity of the fluid injection system, wherein the first pressure is below a threshold pressure; increasing the fluid pressure to a second pressure above the threshold pressure in order to initiate shearing of the shear plug, wherein the threshold pressure is the shear pressure of a shear element securing the shear plug in the fluid injection system; and upon shearing, capturing at least a portion of the shear plug in a sump cavity downstream of the flow ports. - View Dependent Claims (20)
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Specification