Technical services in foreign oil, especially for deep well, ultra-deep well testing services, more and more to use the full path of the APR tools. The OMNI cycle valve is in addition to the test valve, the core of the kinds of tools, and its working properly or not directly related to the test was successful.
OMNI is a cycle valve annulus pressure through the operation, the cycle can be repeated switching valve, is also a more advanced cycle valve. The cycle of valve operation simply cyclical annulus pressure, release pressure to complete the operation. But also because it can repeatedly switch, as a test string APR most commonly used tool. OMNI cycle of valve operation while simple, but maintenance It is worth noting that there are still many places, such as a slight mistake, not only will not be able to operate in accordance with the purpose of this valve is expected to affect the success of technology, but also because the operation caused by inappropriate tool damage, and thus lead to unnecessary loss. The following is given the experience and is author of combined testing services in Indonesia in more than a few dozen wells in the application layer obtained at the scene, I believe will have the operator APR tools in use in the future help. The successful application of tools will also be a broader expansion of our technology services space.
Operation in common anomaly
(1) If you are obviously not functioning OMNI valve, the proposed increase in annulus pressure, if the irregular operation of tools, the most likely location is in the cycle of laps before the 3-4 position of the trip. (2) increase in operating pressure to the maximum allowable pressure, until the arrival of tools to reflect the correct position. If the tool is still no response, most likely OMNI valve is closed the ball valve. (3) If the tool does not respond when the ball valve closed, it should be a balance of pressure through the ball valve and then the operation of high pressure operation tool. (4) If the hole is difficult to close the cycle, is likely to be part of circle of holes have been plugged, the pressure should be increased at this time. Recommend the use of high pressure to plug the open circle from the opening hole of debris.
Maintenance should be paid attention to the issue of
1. The inspection prior to demolition
OMNI valve should be ensured before the demolition of the location in the cycle, otherwise the ball valve opening only part of a tool for other parts of the demolition is not possible, any forcible demolition tools are likely to cause damage.
2. The use of special tools
In order to avoid damage to the demolition of part of the cycle of the pawl and the OMNI valve seals, when the sets of installation and removal of cycle, should the use of special tools, and as far as possible avoid the use of tools such as copper hit a hard line.
3. The direction of the ball valve
Regardless of the status of the ball valve in the open or off state, there are two types of location will enable the ball to the toolbar installed, so maintenance should pay special attention to the direction of the ball valve of the ball. End for just maintenance of the OMNI valve, should be in circulation areas, both open hole and the ball valve cycle closed. Normal after the installation is complete, should make the ball "eyes" outward, that is the direction away from the tool. Such as anti-loaded ball valve, on the ground so hard to find when the function tests. Cycle of operation from the location of the location of the test tool can operate as expected, but after going down tools, OMNI valve will only be able to remain in the test position, the cycle can no longer functioning position, the realization of the normal cycle of operation.
Suggestions
1. The test cycle as well, should always monitor the annulus pressure valve in order to accurately grasp the OMNI institutions transposition transposition of the location of the ball. Particularly in the recycling process, they should pay close attention to the number of cycles as well as abnormal can not be expected to pressure or changes in the law. Proposed installation to monitor wellhead annular pressure and recorded in the Barton card recorder or data acquisition system will be a pressure probe connected with the annulus ring in at any time to monitor changes in air pressure.
2. Proposed to go down for each tool should be at the scene after the operation and maintenance part of the cycle, especially for high water, because the sand can be serious damage to cycle and cycle parts valve seals.
3. If the tools work in the underground non-normal (circular hole is not open, etc.), after starting to make tool should be running to the location of the cycle. Suggesting that this step-by-step operations room to monitor the pressure of nitrogen, which will help determine problems with the site tools. If the ground is still difficult for transposition, it is proposed to operate part removed to retain the pawl, and then re-operation, as part of the ball valve may also lead to credit card issuers can not be transposed.
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