Construction method suitable for maintaining workover well
A construction method and workover rig technology, applied to drilling equipment, earthwork drilling, 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: 2018-07-10
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
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Embodiment Construction
[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0033] figure 1 It is a flow chart of a construction method suitable for overhauling well maintenance 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 lengths in both the first direction and the second direction are 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 within the construction area, including the center of the construction area and areas other than the center.
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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 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 wells helps to increase crude oil production. [0003] In the production process, the well is equipped with a casing to support the well wall, and in the casing, there are often falling objects in the well, 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 development of the well, the well is gradually aging, and the problems in the well gradually increase, and finally the well that can be produced normally evolves into a major workover. Perform complex repairs in wells. [0004] At present, the maintenance of major workovers is mainly carried out by wor...
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