CN110640396B - Method for controlling drift diameter of thick line thickened oil pipe - Google Patents
Method for controlling drift diameter of thick line thickened oil pipe Download PDFInfo
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- CN110640396B CN110640396B CN201810680784.5A CN201810680784A CN110640396B CN 110640396 B CN110640396 B CN 110640396B CN 201810680784 A CN201810680784 A CN 201810680784A CN 110640396 B CN110640396 B CN 110640396B
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Abstract
A method for controlling drift diameter of a slick line thickened oil pipe comprises the following steps: 1) producing a thickened oil pipe main pipe; 2) thickening two ends of the oil pipe main pipe, wherein the difference between the maximum wall thickness position and the minimum wall thickness position is not more than 0.8 mm; 3) after thickening, using a drift diameter rod to perform drift diameter within the length of 100mm of the thickened end; 4) threading two ends of the thickened oil pipe meeting the inspection requirements of the step 2) and the step 3); 5) after threading, inspecting the threads according to the API SPEC 5B standard; 6) for the oil pipe with qualified thread inspection, measuring the wall thickness between the circular gauge shoulder and the inner wall; 7) screwing a coupling to the factory end of the thickened oil pipe; 8) and carrying out full-length hydraulic drift diameter on the oil pipe with the coupling. The invention can ensure the drift diameter of each oil pipe in the oil field after the oil pipe is screwed, buckled and connected into a pipe column and is put into the oil and gas well, and further can normally carry out slick line operation, thereby meeting the operation requirements of the oil and gas field, particularly the offshore oil and gas field on each link of well completion, well workover and testing.
Description
Technical Field
The invention relates to the field of oil pipe manufacturing, in particular to a method for controlling a slick line thickened oil pipe drift diameter.
Background
The oil pipe for oil and gas exploitation is manufactured according to API SPEC 5CT and API SPEC 5B standards. The oil pipe is put into the production casing to form a channel between the underground oil-gas reservoir and the ground to control the flow of crude oil and natural gas. After the oil pipe is put in, a series of well completion, well repair and test operations can be carried out in the oil pipe. Of these, slide line operations are the most important mode of operation in oil and gas field operations, particularly offshore oil and gas field operations.
The slick line operation is to control a steel wire wound on a winch drum, and achieve the purpose of operating a downhole tool by utilizing mechanical lifting and lowering and quick shocking. For example, with a particular tool, a tool instrument may be deployed downhole at a specified location, etc. at the surface.
The risk of a slick line job is very high. The underground conditions are complex and various, such as deformation of an oil pipe, blockage of foreign matters, wax deposition in a shaft, sand burying and the like, and all the conditions cannot be observed by naked eyes and are judged by operation experience. In case of accidents, considerable time and measures are required for disposal.
For the above reasons, in any slick line work operation, the first step must be to gauge the string using a drift gauge of the appropriate size. The smooth and deformation-free underground pipe column is ensured, and the operating conditions are met; meanwhile, wax, rust, detritus and the like on the pipe wall can be scraped off, so that the subsequent operation is convenient; in the target operation depth, the steel wire tension data of the depth can be recorded, and reference and the like are provided for subsequent operation. If the well is not opened, the operation tool is put into the well in a trade, the operation cannot be completed normally or the tool string meets a card, and the steel wire breakage accident can even be caused seriously. Thus, the step of the drift size is the first step in all wireline operations.
According to the API SPEC 5CT standard, a drift diameter rod is required to carry out full-length drift diameter inspection on each oil pipe before the oil pipe leaves a factory. Meanwhile, according to the API SPEC 5CT standard, one end of an oil pipe leaving a factory is turned with external threads, the other end of the oil pipe is turned with the external threads and then is screwed with a coupling, namely the other end of the oil pipe is actually a coupling internal thread. After the oil pipes are transported to an oil field site by a production plant, the external thread of each oil pipe and the internal thread of another oil pipe coupling are screwed, buckled and connected into a pipe column at a well site, and then the pipe column is put into an oil and gas well. Before the slick line operation is carried out, a drift gauge meeting the API SPEC 5CT standard requirement on the outer diameter size of a drift diameter rod must be put in to drift the diameter of a pipe column in an oil and gas well.
As can be seen from the steps, the production plant only carries out full-length drift diameter on a single oil pipe. In the oil field, each oil pipe is screwed, buckled and connected into a pipe column, and the pipe column is put into the oil-gas well and then subjected to drift diameter.
Therefore, the production plant only carries out full-length drift diameter on each oil pipe and passes through the drift diameter, and the drift diameter of the oil pipes connected into the pipe column in the oil field cannot be guaranteed to have no problem. The condition is particularly remarkable in the case of the thickened oil pipe, the thickened oil pipe which passes through the drift diameter of a production plant is not enough in drift diameter after being buckled and connected into a pipe column on an oil field, subsequent slick line operation cannot be carried out, and great loss is brought to the production of the oil field.
Disclosure of Invention
The invention aims to provide a method for controlling the drift diameter of a thick oil pipe of a slick line, which can ensure the drift diameter of each oil pipe after the oil pipe is screwed, buckled and connected into a pipe column to be put into an oil and gas well on the site of an oil field, and further can normally carry out slick line operation, thereby meeting the operation requirements of the oil and gas field, particularly an offshore oil and gas field on each link of well completion, well workover and testing.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for controlling drift diameter of a slick line thickened oil pipe comprises the following steps:
1) producing a thickened oil pipe main pipe;
2) thickening two ends of the oil pipe main pipe, controlling the circumferential wall thickness of the thickened end to be extremely different during thickening, and enabling the difference between the maximum wall thickness position and the minimum wall thickness position to be not more than 0.8 mm;
3) after thickening, using a drift diameter rod to perform drift diameter within the length of 100mm of the thickened end, wherein for the oil pipe outer diameter less than or equal to phi 73.02mm, the minimum size of the drift diameter rod is nominal inner diameter-0.8 mm; for the oil pipe with the outer diameter larger than phi 73.02mm, the minimum size of the drift diameter rod is nominal inner diameter-1.5 mm;
4) threading two ends of the thickened oil pipe meeting the inspection requirements of the step 2) and the step 3);
5) after threading, inspecting the threads according to the API SPEC 5B standard;
6) for an oil pipe with qualified thread inspection, an API standard ring gauge is tightened on the external thread, the wall thickness between the shoulder of the ring gauge and the inner wall is measured, and the difference between the maximum wall thickness and the minimum wall thickness in the same circumference is required to be not more than 1.5 mm;
7) screwing a coupling to the factory end of the thickened oil pipe;
8) and carrying out full-length hydraulic drift diameter on the oil pipe with the coupling.
Further, full-length hydraulic diameter drifting is carried out before threading in step 4), and diameter drifting is carried out on the pipe end of the oil pipe with the coupling in step 8) after threading, thread inspection and coupling screwing in steps 4) -7).
Further, the steel pipe is subjected to full length heat treatment after completion of thickening.
After completion of thickening, the steel pipe was subjected to full-length flaw detection.
Prior to the present invention, for the upset tubing, only the upset outer diameter was measured and the wall thickness of the upset was not checked in accordance with the API SPEC 5CT standard.
The invention controls the circumferential wall thickness extreme difference of the thickened end when thickening for the first time, namely the difference between the maximum wall thickness position and the minimum wall thickness position is not more than 0.8 mm. By controlling the extremely poor wall thickness of the thickened end, the uniformity of the wall thickness of the thickened end is improved.
Prior to the present invention, only the full length of the tubing was latticed for the heavy gauge tubing according to the API SPEC 5CT standard. For the oil pipe outer diameter less than or equal to phi 73.02mm, the minimum size of the drift diameter rod is nominal inner diameter-2.38 mm; for oil pipe outer diameter larger than phi 73.02mm, the minimum size of the drift diameter rod is nominal inner diameter-3.18 mm.
The invention firstly uses the drift diameter rod to perform drift diameter within the length of 100mm of the thickened end after the thickening is finished. For the oil pipe outer diameter less than or equal to phi 73.02mm, the minimum size of the drift diameter rod is nominal inner diameter-0.8 mm; for tubing outside diameter greater than phi 73.02mm, the minimum dimension of the drift diameter rod is nominal inside diameter-1.5 mm. Through the drift diameter of tightening the pipe end of the thickened oil pipe, the drift diameter size of two oil pipes which are connected into a pipe column through screwing, screwing and buckling and then are put into the oil-gas well is ensured.
Prior to the present invention, API Standard ring gauges were used only to measure the standoff of the external thread, according to the API SPEC 5B standard.
In the invention, the API standard ring gauge is tightened on the external thread for the first time, the wall thickness between the shoulder of the ring gauge and the inner wall is measured, and the difference between the maximum wall thickness and the minimum wall thickness in the same circumference cannot exceed 1.5 mm.
For the slick line drift diameter of the thickened oil pipe, the most troublesome is that all oil pipes meet the standard requirements after being tested according to API SPEC 5CT and API SPEC 5B standards in a production plant, especially the full-length drift diameter is carried out according to the API SPEC 5CT standard, but the drift diameter is not too large when a drift diameter gauge with the same size as a drift diameter rod is used underground after the oil field is buckled into a pipe column. For this reason, the invention creatively changes the API standard ring gauge originally used for measuring the thread tight pitch parameter of the oil pipe in the axial direction into the cross section wall thickness parameter of the oil pipe in the radial direction. Through measuring the wall thickness range of the cross section of the turned wire, the deviation caused by thickening and the deviation caused by turning the wire are combined into a whole, and the drift diameter size of two oil pipes which are connected into a pipe column through screwing, screwing and screwing up is ensured after the pipe column is put into the oil and gas well.
The invention has the beneficial effects that:
compared with the prior art, the thickened oil pipe produced by the invention not only can pass through the single full-length drift diameter of each oil pipe in a production plant, but also can pass through the drift diameter of each oil pipe in an oil field after each oil pipe is screwed, buckled and connected into a pipe column to be lowered into an oil-gas well, so that the slick line operation can be normally carried out, and the operation requirements of the oil-gas field, particularly an offshore oil-gas field, on each link of well completion, well repair and test are met.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
For a thickened oil pipe with the specification of phi 73.02 multiplied by 5.51mm, the specific steps are as follows:
1) producing a thickened oil pipe main pipe;
2) and thickening two ends of the oil pipe main pipe. Controlling the circumferential wall thickness extreme difference of the thickened end during thickening, namely the difference between the maximum wall thickness position and the minimum wall thickness position is not more than 0.8 mm;
3) and (4) after thickening is finished, performing drift diameter on the thickened end within the length of 100mm by using a special drift diameter rod. The minimum size of the drift diameter rod is nominal inner diameter-0.8 mm, namely the minimum size is 61.2 mm;
4) carrying out full-length heat treatment on the steel pipe after thickening;
5) carrying out full-length flaw detection on the steel pipe after the heat treatment is finished;
6) threading two ends of the thickened oil pipe meeting the inspection requirements of the step 2) and the step 3);
7) after threading, inspecting the threads according to the API SPEC 5B standard;
8) for an oil pipe with qualified thread inspection, an API standard ring gauge is tightened on the external thread, the wall thickness between the shoulder of the ring gauge and the inner wall is measured, and the difference between the maximum wall thickness and the minimum wall thickness in the same circumference is required to be not more than 1.5 mm;
9) screwing a coupling to the factory end of the thickened oil pipe;
10) and carrying out full-length hydraulic drift diameter on the oil pipe with the coupling. The minimum dimension of the outside diameter of the drift diameter rod is 59.62 mm.
And after the phi 73.02 multiplied by 5.51mm thickened oil pipes are transported to an oil field site by a production plant after all the control steps are completed, screwing the external thread of each oil pipe and the internal thread of another oil pipe coupling together to form a pipe column at a well site, and then putting the pipe column into an oil and gas well. Before performing the slick line operation, a drift gauge with a minimum outer diameter of 59.62mm is run to drift and pass the tubing string in the oil and gas well smoothly.
Example 2
For a thickened oil pipe with the specification of phi 88.9 multiplied by 6.45mm, the specific steps are as follows:
1) producing a thickened oil pipe main pipe;
2) thickening two ends of the oil pipe main pipe, and controlling the circumferential wall thickness extreme difference of the thickened end during thickening, namely the difference between the maximum wall thickness position and the minimum wall thickness position is not more than 0.8 mm;
3) after thickening, using a special drift diameter rod to drift the drift diameter within the length of 100mm of the thickened end; the minimum size of the drift diameter rod is nominal inner diameter-1.5 mm, namely the minimum size is 74.5 mm;
4) for the full-length hydraulic drift diameter of the oil pipe, the minimum size of the outer diameter of the drift diameter rod is 72.82 mm;
5) threading two ends of the thickened oil pipe meeting the inspection requirements of the step 2) and the step 3);
6) after threading, inspecting the threads according to the API SPEC 5B standard;
7) for an oil pipe with qualified thread inspection, an API standard ring gauge is tightened on the external thread, the wall thickness between the shoulder of the ring gauge and the inner wall is measured, and the difference between the maximum wall thickness and the minimum wall thickness in the same circumference is required to be not more than 1.5 mm;
8) screwing a coupling to the factory end of the thickened oil pipe;
9) performing pipe end drift diameter on the pipe end with the coupling; the minimum dimension of the outside diameter of the drift diameter rod is 72.82 mm.
After all the control steps are completed, the thickened oil pipes with the diameter of 88.9 multiplied by 6.45mm are transported to an oil field site by a production plant, and the external thread of each oil pipe and the internal thread of another oil pipe coupling are screwed, buckled and connected into a pipe column at a well site and then are put into an oil and gas well. Before the slick line operation, a drift gauge with the minimum outer diameter of 72.62mm is put in to drift and smoothly pass through a pipe string in the oil and gas well.
The thickened oil pipe produced by the invention not only can pass through the single full-length drift diameter of each oil pipe in a production plant, but also can pass through the drift diameter of each oil pipe in an oil field after each oil pipe is screwed, buckled and connected into a pipe column to be put into an oil-gas well, so that the slick line operation can be normally carried out, and the operation requirements of the oil-gas field, particularly an offshore oil-gas field, on each link of well completion, well workover and testing can be met.
Claims (5)
1. A method for controlling a slick line thickened oil pipe drift diameter is characterized by comprising the following steps:
1) producing a thickened oil pipe main pipe;
2) thickening two ends of the oil pipe main pipe, controlling the circumferential wall thickness of the thickened end to be extremely different during thickening, and enabling the difference between the maximum wall thickness position and the minimum wall thickness position to be not more than 0.8 mm;
3) after thickening, using a drift diameter rod to perform drift diameter within the length of 100mm of the thickened end, wherein for the oil pipe outer diameter less than or equal to phi 73.02mm, the minimum size of the drift diameter rod is nominal inner diameter-0.8 mm; for the oil pipe with the outer diameter larger than phi 73.02mm, the minimum size of the drift diameter rod is nominal inner diameter-1.5 mm;
4) threading two ends of the thickened oil pipe meeting the inspection requirements of the step 2) and the step 3);
5) after threading, inspecting the threads according to the API SPEC 5B standard;
6) for an oil pipe with qualified thread inspection, an API standard ring gauge is tightened on the external thread, the wall thickness between the shoulder of the ring gauge and the inner wall is measured, and the difference between the maximum wall thickness and the minimum wall thickness in the same circumference is required to be not more than 1.5 mm;
7) screwing a coupling to the factory end of the thickened oil pipe;
8) and carrying out full-length hydraulic drift diameter on the oil pipe with the coupling.
2. The method for controlling the drift diameter of a slick line thickened oil pipe as claimed in claim 1, wherein the full-length hydraulic drift diameter is carried out before threading in the step 4), and after threading in the steps 4) -7), thread inspection and screwing-in of a coupling, the drift diameter is carried out on the pipe end of the oil pipe with the coupling in the step 8).
3. The method for controlling the drift diameter of a slick line thickened oil pipe as claimed in claim 1 or 2, wherein the steel pipe is subjected to full length heat treatment after the thickening is completed.
4. The method for controlling the drift diameter of a slick line thickened oil pipe as claimed in claim 1 or 2, wherein full-length flaw detection is performed on the steel pipe after the thickening is completed.
5. The method for controlling the drift diameter of a slick line thickened oil pipe as claimed in claim 3, wherein full length flaw detection is performed on the steel pipe after the thickening is completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810680784.5A CN110640396B (en) | 2018-06-27 | 2018-06-27 | Method for controlling drift diameter of thick line thickened oil pipe |
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| CN201810680784.5A CN110640396B (en) | 2018-06-27 | 2018-06-27 | Method for controlling drift diameter of thick line thickened oil pipe |
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| CN110640396A CN110640396A (en) | 2020-01-03 |
| CN110640396B true CN110640396B (en) | 2022-03-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194328A (en) * | 1998-04-24 | 1998-09-30 | 辽河石油勘探局钻井一公司 | Technology for producing non-standard size integrated-joint petroleum casing |
| CN101187292A (en) * | 2007-11-29 | 2008-05-28 | 胜利油田孚瑞特石油装备有限责任公司 | Supercritical heat-insulated oil pipe production method |
| CN101481995A (en) * | 2008-01-11 | 2009-07-15 | 江苏嘉宝科技制管有限公司 | High steel level petroleum casing pipe and oil pipe manufacturing process |
| CN202544762U (en) * | 2012-04-20 | 2012-11-21 | 山东墨龙石油机械股份有限公司 | 2<7/8> large-inner-diameter oil pipe |
| CN206647055U (en) * | 2017-04-06 | 2017-11-17 | 盐城旭东机械有限公司 | A kind of choke manifold variable path erosion resistance pipe nipple |
-
2018
- 2018-06-27 CN CN201810680784.5A patent/CN110640396B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194328A (en) * | 1998-04-24 | 1998-09-30 | 辽河石油勘探局钻井一公司 | Technology for producing non-standard size integrated-joint petroleum casing |
| CN101187292A (en) * | 2007-11-29 | 2008-05-28 | 胜利油田孚瑞特石油装备有限责任公司 | Supercritical heat-insulated oil pipe production method |
| CN101481995A (en) * | 2008-01-11 | 2009-07-15 | 江苏嘉宝科技制管有限公司 | High steel level petroleum casing pipe and oil pipe manufacturing process |
| CN202544762U (en) * | 2012-04-20 | 2012-11-21 | 山东墨龙石油机械股份有限公司 | 2<7/8> large-inner-diameter oil pipe |
| CN206647055U (en) * | 2017-04-06 | 2017-11-17 | 盐城旭东机械有限公司 | A kind of choke manifold variable path erosion resistance pipe nipple |
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