Half-time aeration cementing method
A cementing and half-process technology, which is applied in the field of oil drilling and cementing, can solve the problems of difficult cementing and completion operations and high cementing operation costs, and achieve the effects of improving the first-time success rate of cementing, low cost, and reducing overall costs
Active Publication Date: 2015-09-23
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0003] The present invention provides a half-cycle air-filled well cementing method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the difficulties in cementing and completion operations caused by formation leakage and the high cost of cementing operations caused by formation leakage. The problem
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[0017] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.
[0018] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the description attached to the description. figure 1 For example, the positional relationship of top, bottom, left, right, etc. is determined according to the layout direction of the drawings in the specification.
[0019] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:
[0020] as attached figure 1 , 2 , 3, and 4, the half-stage aerated cementing method is carried out according to the following steps: the first step, the completion casing string 1 is run in the well 3, and when the completion casing string 1 is run to the middle , fixedly install th...
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The invention relates to the technical field of well cementing of oil drilling and discloses a halfway gas-filling cementing method. The method includes the steps: firstly, setting a well completion casing string into a well, fixedly mounting a jet nipple on the outer side of the well completion casing string or in the well completion casing string at a wellhead when the well completion casing string is set to the halfway, enabling a nozzle of the jet nipple to be upward or face the lateral sidewall of the well, fixedly mounting a gas filling pipe communicated with an inner cavity of the jet nipple on the jet nipple, and continuing setting the well completion casing string. The method is simple in process and low in cost, circulation is inductively and effectively established by decreasing the density of annulus fluid and cement paste, well cementing operation can be safely and quickly finished under the condition of existing equipment for well cementing and completion operation, one-time success rate of well cementing of low-pressure formations and leaky formations is increased greatly, comprehensive cost of production is greatly reduced, and new formation leakage is effectively prevented from forming.
Description
technical field [0001] The invention relates to the technical field of petroleum drilling and well cementing, and relates to a half-time aeration cementing method. Background technique [0002] With the expansion of oil exploration and development to the depth direction and marginal areas, the formations encountered during the drilling process are becoming more and more complex. There are multiple sets of pressure systems in the same wellbore, and the safe density window of drilling fluid is narrow (that is, the difference between the formation pore pressure and the formation loss pressure At the same time, the fracture pressure gradient of the formation is extremely low, which brings many difficulties to the cementing and completion. The work of improving the pressure bearing capacity of the formation before the lower casing consumes a lot of manpower, material resources and time. After the casing is lowered to the predetermined position Circulation cannot be established du...
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IPC IPC(8): E21B33/13
Inventor 陈杰王学良李辉姚伦陶梦蛟秦静
Owner BC P INC CHINA NAT PETROLEUM CORP