Sucker rod and its oil well

Abstract

The invention discloses a sucker rod and an oil well using the same. The sucker rod can be arranged in an oil pipe; the lower end of the sucker rod is used for being connected with an oil well pump; the sucker rod comprises a plurality of sucker rod sections connected in series through a first thread; a connecting piece is arranged in the predetermined position of the sucker rod; the connecting piece comprises a first part and a second part which are connected in the length direction of the sucker rod; the first part and / or the second part are / is connected with the sucker rod sections through the first thread; the first part is connected with the second part through a second thread; and one of the first thread and the second thread is a positive thread, and the other is a reverse thread. According to the sucker rod and the oil well using the same, waste of the sucker rod can be reduced when the sucker rod is pulled out and clamped, and the clamping freeing work time is shortened.

Description

technical field [0001] The invention relates to the field of petroleum production machinery, in particular to a sucker rod and an oil well thereof. Background technique [0002] At the oil production site, it is necessary to pull out the oil extraction string during operations such as pump inspection and oil production and steam injection switching. And in the operation process of needing to pull out the oil sucker string, if run into the problem of sucker rod sticking and when unblocking is invalid, can only pull out the sucker rod vigorously at present, then set up the pipe rod. Such a construction method has at least the following four disadvantages: [0003] 1. When the sucker rod is pulled out and a load is applied, the sucker rod receives a large instantaneous pulling force, so the rebound force of pulling out is also very large. The strength of the sucker rod elevator and square clip is unbearable, and it is easy to bounce off, which increases the operation risks to...

AI Technical Summary

Problems solved by technology

[0003] 1. When the sucker rod is pulled out and a load is applied, the sucker rod receives a large instantaneous pulling force, so the rebound force of pulling out is also very large. The strength of the sucker rod elevator and square clip is unbearable, and it is easy to bounce off, which increases the operation risks to the safety of personnel;

[0004] 2. In the process of casing pipe rods, the sucker rods of the whole well are basically cut off, resulting in a large waste;

[0005] 3. It is difficult to seal the well during the process of casing the pipe rod, and the risk of well control is great;

[0006] 4. It is difficult to cut sucker rods. It takes more than 15 minutes to cut each hollow rod with a saw blade. For high-strength solid rods and plug-in rods, electric grinding wheels and electric welding can only be used for cutting, which poses a high safety risk.

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