A Construction Method Applicable to Maintenance and Workover
A construction method and technology of workover rigs, which are applied in earthwork drilling, drilling equipment, wellbore/well components, etc., can solve problems such as difficult maintenance and many obstacles, and achieve improved efficiency, small size, and easy installation and transportation Effect
Active Publication Date: 2020-08-11
PETROCHINA CO LTD +1
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Problems solved by technology
[0005] In order to solve the problem that it is difficult to maintain when there are many obstacles around the overhaul well, the embodiment of the present invention provides a construction method suitable for overhaul well maintenance
Method used
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Embodiment Construction
[0032] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0033] figure 1 It is a flow chart of a construction method suitable for maintenance and workover provided by the embodiment of the present invention, such as figure 1 As shown, the construction method includes:
[0034] S11: Determine the construction area.
[0035] Specifically, the construction area takes the wellhead of the well to be overhauled as the origin in the horizontal plane, the length in both the first direction and the second direction is not less than 15m, and the first direction and the second direction are orthogonal to each other.
[0036] It should be noted that the origin can be located at any position in the construction area, including the center of the construction area and areas other than the center.
[003...
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The invention discloses a construction method suitable for maintaining a workover well and belongs to the technical field of oil production. The construction method comprises the steps that a construction area is determined; maintaining equipment is arranged on the construction area in the mode of surrounding a wellhead of the to-be-worked-over well; a derrick of an anchor-rope-free workover rig is arranged and erected on one side of the wellhead of the to-be-worked-over well; a drilling tool string is downwards put into the to-be-worked-over well through the anchor-rope-free workover rig; a top drive is hoisted to the wellhead of the workover well through the anchor-rope-free workover rig, and the drilling tool string is connected with the top drive; and the drilling tool string is driventhrough the top drive to rotate so as to maintain the to-be-worked-over well. The anchor-rope-free workover rig is adopted for maintenance, therefore, an outer anchor rope does not need to be arranged; and power of the drilling tool string is provided through the top drive, the top drive has the characteristic of being small in size and weight, therefore, mounting and transferring are facilitated, workover construction can be developed advantageously, and the maintaining efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a construction method suitable for repairing and overhauling wells. Background technique [0002] In the process of oil extraction, a large number of wells need to be drilled, and maintaining the normal production of the wells helps to increase crude oil production. [0003] During the production process, the well is equipped with a casing to support the well wall, and the falling objects often occur in the casing, and sometimes the casing is deformed, which will hinder the normal drilling during the drilling process. , affecting the normal production of the well. With the progress of development, the wells are gradually aging, and the problems in the wells are gradually increasing. Finally, the wells that can be produced normally are transformed into major workover wells. Perform complex repairs in the well. [0004] At present, the maintenance of major workove...
Claims
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IPC IPC(8): E21B19/00E21B29/00
CPCE21B19/00E21B29/00
Inventor 兰中孝王林张玉生赵继良陈显进
Owner PETROCHINA CO LTD