Catcher used in well logging process
A trap and logging technology, applied in surveying, wellbore/well components, earth-moving drilling, etc., can solve the problems of high labor intensity of operators, unfavorable high-pressure well testing, wire cable breaking, etc., so as to avoid falling well accidents. , Real application value, convenient loading and unloading effect
Inactive Publication Date: 2014-01-29
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0002] At present, in the field of high and low pressure testing of oil and gas wells in the petroleum industry, accidents sometimes occur, causing steel wires or cables to break at the wellhead, resulting in instrument fall accidents
At present, the traps used to prevent the accidental fall of the instrument are all external integrated equipment, which are divided into the upper trap installed on the upper part of the blowout tube
Method used
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[0019] According to attached figure 1 , 2 As shown in and 3, the trap in the well logging includes a cylindrical trap cover 1, the inner diameter of the lower end of the trap cover 1 is smaller than the inner diameter of the upper end, and an adjusting shrapnel 4 is threadedly connected to the upper inner part of the catch cover 1. There are slips 2 in the inner and lower part of the catcher coat 1, and a control spring 3 is arranged between the slips 2 and the regulating shrapnel 4, and the inside section of the bottom of the catcher coat 1 is inverted conical. There is a through hole 6 in the center of the regulating shrapnel and a groove 7 at the top. There is an external thread 5 on the outside of the upper part of the catcher jacket 1, and an annular boss 8 is arranged on the inner and lower part of the slip 2, and the slip 2 is composed of two arc-shaped slips 9.
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The invention belongs to the technical field of petroleum, and particularly relates to a catcher used in the well logging process. The catcher is used for preventing instruments from dropping into a well in the process of measuring high-low pressure of an oil and gas well site in the petroleum industry and in the operation process of lifting and dropping steel wires and cables. According to the technical scheme, the catcher used in the well logging process comprises a catcher outer cover which is cylindrical in shape. The inner diameter of the lower end of the catcher outer cover is smaller than the inner diameter of the upper end, an external thread which is arranged on the outer upper portion of the catcher outer cover is connected with a blowout prevention box, a thread on the inner upper portion of the catcher outer cover is connected with an adjusting elastic piece, a slip is arranged on the inner lower portion of the catcher outer cover, and a control spring is arranged between the slip and the adjusting elastic piece. According to the technical scheme, the catcher is simple in structure and small in size, the catcher is installed inside a blowout prevention pipe, a sealing device does not need to be additionally arranged, and the catcher has the catching function of preventing the instruments from accidentally dropping into the well.
Description
technical field [0001] The invention belongs to the technical field of petroleum, and in particular relates to a logging internal catcher which is used for on-site high and low pressure testing of oil and gas wells in the petroleum industry and prevents instruments from falling into the well during operation of lifting and lowering steel wires and cables. Background technique [0002] At present, in the field of high and low pressure testing of oil and gas wells in the petroleum industry, accidents sometimes occur, causing steel wires or cables to break at the wellhead, resulting in accidents of instruments falling into the well. At present, the traps used to prevent the accidental fall of the instrument are all external integrated equipment, which are divided into the upper trap installed on the upper part of the blowout tube and the lower trap installed on the lower part of the blowout tube. Both of them must be connected with the blowout tube when in use. A part of the no...
Claims
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Login to view more IPC IPC(8): E21B47/017E21B47/06
Inventor 高安邦岳小华薛元真李友全李其朋郭建福于伟杰顾辉亮
Owner CHINA PETROLEUM & CHEM CORP
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