Blowout prevention box for pumping steel wire rope
A technology of steel wire rope and blowout prevention box, which is applied in the direction of wellbore/well parts, earthwork drilling, sealing/package, etc. It can solve the problems of steel wire rope that cannot be sealed, environmental pollution, and failure to reach, and achieves the goal of solving the problem of wire rope sealing. Effect
Inactive Publication Date: 2013-11-27
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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Problems solved by technology
In the construction process of draining the liquid in the well and in the formation, the method of swabbing to induce blowout is often used, but this simple, practical and efficient liquid drainage method cannot be widely used in major oil and gas fields because the steel wire rope used for swabbing cannot be sealed. The application of the "three low" oil and gas reservoirs in Changqing has been widely used
However, this technology still has the problem that the wellhead cannot bear pressure and cannot meet the requirements of process sealing, resulting in environmental pollution and cannot meet the requirements of safe and clean production.
Method used
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[0025] The swabbing wire rope anti-blowout box provided in this embodiment is mainly composed of an upper righting unit, a two-stage pneumatic (hydraulic) sealing unit, a lower righting unit, and a safety pull-off unit. The unit, the lower righting unit, and the safety pull-out unit are respectively connected by threads, and the specific structure is shown in the following description.
[0026] like figure 1 As shown, a pumping wire rope anti-blowout box includes a safety pull-out mechanism 1 and a sealing mechanism arranged on it. The special feature is that the sealing mechanism consists of a primary seal 2 and a secondary The top of the secondary seal 3 is provided with an upper centralizer 6 , and the lower centralizer 7 is provided between the primary seal 2 and the safety pull-out mechanism 1 . A recirculation chamber 4 is provided between the primary seal 2 and the secondary seal 3 , and a guide pipe 5 is drawn out of the recirculation chamber 4 .
[0027] see figur...
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The invention relates to a blowout prevention box for a pumping steel wire rope, which comprises a safety pull-out mechanism and a seal mechanism arranged on the safety pull-out mechanism, wherein the seal mechanism consists of a primary sealing element and a secondary sealing element which are arranged from bottom to top; a backflow chamber is formed between the primary sealing element and the secondary sealing element, and a diversion pipe is arranged on one side of the backflow chamber; the primary sealing element and the secondary sealing element are formed by an air cylinder and a sealing strip which is arranged in the air cylinder and extends along the axial direction of the air cylinder; a through hole through which the steel wire rope passes is formed in the center of the air cylinder, and the sealing strip is arranged on the periphery of the through hole; and the steel wire rope passes through the backflow chamber. The blowout prevention box has the advantages of solving the problem of the sealing of the steel wire rope effectively by the primary sealing element, the secondary sealing element and upper and lower centralizers, along with energy conservation and environment friendliness.
Description
technical field [0001] The invention belongs to the oil and gas industry, and relates to the sealing technology for the steel wire ropes used under high pressure in various steel wire rope operation technologies in the oil and gas testing process, and is a sealing technology for the steel wire ropes used. Background technique [0002] In the oil and gas testing process, it is usually necessary to carry out various transformation measures on the oil and gas layers, such as fracturing, acidizing, and well killing operations. The subsequent procedures must discharge the formation and the construction fluid in the well to restore the oil and gas layers. In the construction process of draining the liquid in the well and in the formation, the method of swabbing to induce blowout is often used, but this simple, practical and efficient liquid drainage method cannot be widely used in major oil and gas fields because the steel wire rope used for swabbing cannot be sealed. It has been ...
Claims
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IPC IPC(8): E21B33/06
Inventor 周丰孙虎邓继学刘培润张敏赵国兴张冕高红平赵小充
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO