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Method used for gas drilling drillstem test

A technology for gas drilling and ground testing, used in surveying, earth-moving drilling, wellbore/well components, etc., can solve the problem of inconvenient installation and fixation of flowmeters, low safety and operability, and prolonged non-drilling time and other problems, to achieve the effect of saving non-drilling time, high safety and reducing drilling costs

Inactive Publication Date: 2010-07-21
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned technical scheme only involves the connection of a half-way test mechanism on the blowdown and sewage pipeline. On the one hand, this scheme is to conduct a midway test while blowing out blowdown and blowdown, and cannot test before blowout blowdown. Such a test method has a comparative It is cumbersome, and the safety and operability are not high. At the same time, the non-drilling time is greatly prolonged and the drilling cost is increased; on the other hand, the installation and fixing of the flowmeter used in this method is inconvenient, especially when the flow It is not easy to replace when the meter is broken

Method used

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  • Method used for gas drilling drillstem test
  • Method used for gas drilling drillstem test
  • Method used for gas drilling drillstem test

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Embodiment 1

[0026] Refer to the attached figure 1 with 2 , the invention discloses a method for midway testing of gas drilling: firstly, the inner blowout prevention pipeline 1, the choke manifold 2, the ground testing device 3 and the outer blowout pipeline 4 are sequentially connected; The test device 3 includes a manifold 9 connected in series with the gas drilling external discharge pipeline 4, a first flat valve 6, a second flat valve 7, a third flat valve 8 and a measuring unit 5, wherein the first flat The valve 6 is installed on the gas drilling external discharge pipeline 4, the second flat valve 7 and the third flat valve 8 are installed on the manifold 9, the measuring unit 5 is installed on the manifold 9, and the measuring unit Be located between the second flat valve 7 and the third flat valve 8; Secondly, when carrying out the midway test, first open the third flat valve 8, then open the second flat valve 7, and finally close the first flat valve 6, at this time the gas T...

Embodiment 2

[0028] Refer to the attached figure 1 , 2 and 3, as a preferred embodiment of the present invention, the present invention discloses a method for midway testing of gas drilling: first, the internal blowout prevention pipeline 1, the choke manifold 2, the ground testing device 3 and the external blowout The pipelines 4 are connected in sequence; wherein, the ground testing device 3 used includes a manifold 9 connected in series with the gas drilling external discharge pipeline 4, and a first flat valve 6, a second flat valve 7, a third flat valve 8 and The measuring unit 5, wherein the first flat valve 6 is installed on the gas drilling external discharge pipeline 4, the second flat valve 7 and the third flat valve 8 are installed on the manifold 9, and the measuring unit 5 is installed on the On the manifold 9, and the measuring unit is located between the second flat valve 7 and the third flat valve 8; secondly, when carrying out the midway test, first open the third flat va...

Embodiment 3

[0030] A specific example of the present invention is as follows:

[0031] The novel process method of the present invention is realized by a new supporting test device and a control process, and the whole ground test device 3 is a skid-mounted body composed of a manifold 9, a flat valve and a measuring unit 5 (such as figure 2 As shown), it is connected with the gas drilling external blowout pipeline 4.

[0032] The measuring unit 5 is the core part of the entire supporting device, and is mainly used to accurately measure the production capacity data (including the flow rate, pressure and temperature of the produced gas).

[0033] The use method of the supporting device involved in the new method is: when the midway test is not carried out, the second flat valve 7 and the third flat valve 8 are normally closed, and the first flat valve 6 is normally open; for the operation method of the midway test, first open the third flat valve Plate valve 8, then open the second plate v...

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Abstract

The invention discloses a method used for a gas drilling drillstem test, which relates to the technical field of petroleum and natural gas drilling methods. The method comprises the following steps of: firstly, connecting an inner blowout pipeline, a throttle manifold, a ground testing device and an outer blowout pipeline in sequence, wherein the adopted ground testing device comprises a manifold which is connected with the gas drilling outer blowout pipeline in series, and a first flat valve, a second flat valve, a third flat valve an a measurement unit; secondly, when a drillstem test is carried out, firstly opening the third flat valve, subsequently opening the second flat valve and finally closing the first flat valve, and at this moment, gas firstly flows through the inner blowout pipeline, then arrives at the throttle manifold and then enters the ground testing device for testing and finally is blown out by the outer blowout pipeline to be ignited. The drillstem test can be carried out before blowout and pollution discharge by adopting the method, and the test can be carried out at any time in the drilling process. A flowmeter adopted in the method can be very conveniently changed when being broken.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas drilling methods, in particular to a method for midway testing of gas drilling. Background technique [0002] Productivity testing is required in the process of gas drilling in the reservoir section. The existing midway test method is to use the drill pipe to run the midway test tool into the well to test the target layer. The test process of this method is cumbersome and has potential safety hazards. At the same time, the non-drilling time is greatly extended and the drilling cost is increased. [0003] The publication number is CN2549154, and the Chinese patent literature published on May 7, 2003 discloses a drilling device for oil and natural gas, and particularly relates to a gas underbalanced drilling device. It includes gas source, air intake and exhaust pipes connecting the air source and drilling tools in the well and drilling tools. By detecting the flow and pressure of the ...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B49/00
Inventor 张汉林杨赟贾军喜张建斌王军闯刘克强
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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