In-well proofreading method for horizontal well communicating equipment
A technology for horizontal wells and equipment, applied in the field of drilling, can solve problems such as failure of connection and abnormal working state, and achieve the effect of ensuring successful connection and reliability
Active Publication Date: 2014-12-03
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
Due to the harsher and more complex working environment in the well than on the ground, coupled with some accidental factors, the connection equipment may go into the well after being checked on the ground, and the working status may be abnormal, resulting in connection failure.
Method used
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[0017] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.
[0018] The in-well verification method of horizontal well connecting equipment provided by the present invention includes:
[0019] Step 102: Obtain the depth range h of the position of the FRP casing in the vertical well as a≤h≤b;
[0020] Step 104, lower the connected equipment to a depth b in the vertical well;
[0021] Step 106: Lift the connected device to a depth a at a speed of 1m / min;
[0022] Step 108: Collect the magnetic flux density at the position where the connected device is located every 0.5m, and compare the collected magnetic flux density value with the standard magnetic flux density value of the corresponding position, and obtain the position with the smallest difference between the two a...
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The invention discloses an in-well proofreading method for horizontal well communicating equipment. The method comprises the following steps: (102) acquiring depth range of the position of a glass reinforced plastic sleeve pipe h in a vertical well, wherein h is larger than or equal to a and smaller than or equal to b; (104) placing the communicating equipment down to the depth of b in the vertical well; (106) lifting the communicating equipment to the depth of a at a speed of 1m / min; (108) collecting magnetic induction density of the communicating equipment at the position when the communicating equipment is lifted by 0.5 m each time; comparing the collected magnetic induction density values with standard magnetic induction density values at corresponding positions to obtain position of which the difference of the values is minimal to be the optimal operating position of the communicating equipment. Through the method, reliability of the equipment can be further improved; the horizontal well is ensured to be communicated successfully better.
Description
Technical field [0001] The invention relates to the technical field of drilling, and in particular to a method for in-well verification of horizontal well connecting equipment. Background technique [0002] my country is a large country with coal resources in the world, rich in coal-bed methane resources, with a resource amount of 36.81×10 12 m 3 , Has broad development prospects. At this stage, vertical wells dominate the development of coalbed methane in my country. However, the low output of single wells and high development costs restrict the increase in reserves and production of coalbed methane, and bring severe challenges to the efficient and economic development of coalbed methane. Horizontal wells are An important way for the efficient development of coalbed methane will form a mode with horizontal wells as the main and vertical wells as the auxiliary in the future. With the progress of CBM development, new types of CBM horizontal well types such as U-shaped wells, multi...
Claims
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Inventor 赵世军李浩王爱玲王风锐王锐谭天宇
Owner BC P INC CHINA NAT PETROLEUM CORP