CN204703816U - Shaping and salvage string - Google Patents

Abstract

The utility model provides a tubular column is salvaged in plastic, include: drilling tools, shuttle drift sizes, fishing tools. One end of the shuttle-shaped drift size gauge is connected with a drilling tool, and the other end of the shuttle-shaped drift size gauge is connected with a fishing tool; the maximum diameter of the shuttle drift size is greater than the maximum diameter of the drilling tool and fishing tool. The utility model provides a tubular column is salvaged in plastic can once accomplish to the sleeve pipe drifting of oil gas field well, the shaping of the sleeve pipe that warp a little and salvage the tubular column that falls into the well, shortens workover cycle, reduces workover operation cost.

Description

Shaping and salvage string

technical field

The utility model relates to the field of oil exploitation, in particular to a shaping and salvage string.

Background technique

In order to ensure the safety of oil and gas fields, it is necessary to work over the oil and gas fields. In the process of workover in oil and gas fields, slight deformation of the casing often occurs, mainly due to shrinkage of the casing. The shrinkage of the casing refers to the reduction of the inner diameter of the casing in the oil and gas field. The diameter of the casing shrinks so that the running tools cannot pass through, and the oil and gas field wells cannot be produced normally. Simultaneously, when the pipe string in the oil and gas field is lifted due to the shrinkage of the casing, the pipe string in the well cannot be taken out and falls in the well, which makes it difficult to salvage the broken pipe string in the well.

At present, the workover and fishing tools only have the function of fishing. When the fishing tool is used to fish the broken pipe string in the well, it is necessary to run the casing shaping tool first to restore the slightly deformed section of the casing to its original shape, and then to use the fishing tool to fish the pipe string that fell into the oil and gas field. pipe string.

However, with the current workover and fishing tools, it is necessary to use the casing shaping tool to restore the slightly deformed section of the casing to the original state before the salvage string can be used to salvage the pipe string that fell into the oil and gas field well, which greatly prolongs the workover operation period and increases the Well workover costs.

Utility model content

The utility model provides a shaping and fishing string, which can shorten the workover period and reduce the workover cost.

The shaping and fishing string provided by the utility model includes: drilling tools, shuttle-type well gauges, and fishing tools;

One end of the shuttle type well gauge is connected to the drilling tool, and the other end is connected to the fishing tool;

The maximum diameter of the shuttle gauge is larger than the maximum diameter of the drilling and fishing tools.

In one embodiment of the present invention, the centers of the drilling tool, the shuttle type well gauge and the fishing tool are located on the same axis.

In one embodiment of the utility model, the shuttle-type well gauge includes: an upper joint, a body and a lower joint;

The upper joint is located at the upper end of the body, the lower joint is located at the lower end of the body, and the centers of the upper joint, the body and the lower joint are located on the same axis.

In one embodiment of the present invention, the body includes a straight portion and an arc portion located at both ends of the straight portion, the upper joint is located on the arc portion at one end of the straight portion, and the lower joint is located at the arc portion at the other end of the straight portion superior.

In an embodiment of the present invention, the diameter of the arc portion is smaller than the diameter of the straight portion.

In an embodiment of the utility model, the body is made of steel, and the steel grade of the body is higher than that of the well wall casing.

In one embodiment of the utility model, an internal thread is provided on the inner wall of the upper joint, and the internal thread is used for connecting drilling tools;

An external thread is provided on the outer wall of the lower joint, and the external thread is used for connecting fishing tools.

In one embodiment of the utility model, the drilling tool is a drill rod.

In one embodiment of the utility model, the drilling tool, the shuttle type well gauge, and the fishing tool are all hollow, and the lower port of the fishing tool is provided with a water hole.

In one embodiment of the utility model, the diameter of the water eye is 8-12mm.

The shaping and salvage string provided by the utility model is connected with a drilling tool at one end and a fishing tool at the other end through a shuttle-type well gauge. Casing well opening and micro-deformation casing shaping, and fishing tools for salvage of fallen well strings, realizing the casing drilling, micro-deformation casing shaping and salvaging of wells in oil and gas fields at one time, making repairing The well period is shortened, and the workover operation cost is reduced.

Description of drawings

Fig. 1 is a structural schematic diagram of a water well and a downhole string in an oil and gas field with slightly deformed casing;

Fig. 2 is a structural schematic diagram of the shaping and salvage string provided by the embodiment of the present invention;

Fig. 3 is a schematic structural view of the shuttle type well gauge provided by the embodiment of the present invention;

Fig. 4 is a structural schematic diagram of the slightly deformed section of the casing for the shaping and salvage string provided by the embodiment of the present invention;

Fig. 5 is a structural schematic diagram of the shaping and fishing string provided by the embodiment of the utility model to repair the slightly deformed section of the casing and salvage the falling well string;

Fig. 6 is a schematic diagram of the structure of the water well in the oil and gas field after the downhole pipe string is salvaged according to the embodiment of the present invention.

Explanation of reference signs:

11: Slightly deformed casing section;

12: Downhole string;

13: oil layer;

21: drilling tool;

22: Shuttle type well gauge;

23: fishing tool;

220: body;

221: upper connector;

222: lower joint;

2201: Straight section

2202: arc portion.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Fig. 1 is a schematic diagram of the structure of a water well in an oil and gas field with slightly deformed casing and a well-falling pipe string. As shown in Fig. 1 , in the workover process of an oil and gas field, a slight deformation of the casing often occurs, resulting in a well section 11 with a slightly deformed casing. The diameter of the casing at the well section 11 with slight deformation of the casing shrinks, so that when the pipe string in the oil and gas field is lifted, the pipe string in the well cannot be taken out and falls into the well, resulting in a downhole pipe string 12 surrounded by oil layers 13 . However, to salvage the downhole string 12, it is necessary to run the casing shaping tool first to restore the slightly deformed casing at the casing micro-deformation section 11, and then run the fishing tool to salvage the downhole string 12 that fell into the well of the oil and gas field, greatly extending the This shortens the workover cycle and increases the workover cost.

The technical problem to be solved by the utility model is how to shorten the workover period and reduce the workover cost. The main idea of the utility model is to provide a shaping and salvage string, which simultaneously has the functions of well drilling, casing shaping and salvage fall string, which can shorten the workover period and reduce the cost of workover operations.

The technical scheme of the utility model is described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 2 is a structural schematic diagram of the shaping and fishing string provided by the embodiment of the utility model. As shown in Fig. 2, the shaping and fishing string provided by the present embodiment includes: drilling tool 21, shuttle-type well gauge 22, and fishing tool 23 .

One end of the shuttle-type well gauge 22 is connected to the drilling tool 21 , and the other end is connected to the fishing tool 23 .

Wherein, the drilling tool 21 is connected to one end of the shuttle-type well gauge 22, and is used to send the shuttle-type well gauge 22 to a predetermined position in the well of the oil and gas field. For example, according to the actual operation requirements, the drilling tool 21 can send the shuttle-type well gauge 22 to the slightly deformed well section 11 of the casing in the oil and gas field well, and can also send the shuttle-type well-gauge 22 to the downhole pipe string 12 in the oil and gas field well place.

It should be noted that the delivery of the shuttle gauge 22 by the drilling tool 21 to the predetermined position in the well of the oil and gas field depends on the actual operation requirements, which is not limited in this embodiment.

Optionally, the drilling tool 21 is a drill rod.

The shuttle type well gauge 22 is a shuttle type well gauge (also known as a drift gauge). The shuttle gauge 22 is used to shape the slightly deformed casing at the well section 11 with slightly deformed casing, so that the slightly deformed casing at the well section 11 with slightly deformed casing can be restored to its original shape. Simultaneously, the shuttle-type drilling gauge 22 is used to realize drilling of casings of oil and gas field wells. Among them, the well drilling refers to the inspection of the inner diameter of the casing of the oil and gas field well. By using the shuttle-type well drilling gauge 22 to drill the well, it is known whether the wellbore of the oil and gas field can be smoothly inserted into various downhole tools.

Specifically, when the micro-deformed casing at the casing micro-deformation section 11 shrinks in diameter, the shuttle-type well gauge 22 checks that the inner diameter of the casing is smaller than the outer diameter of the shuttle-type drift gauge, and the shuttle-type well gauge 22 is passed through After the slightly deformed pipeline, the slightly deformed pipeline is expanded, and the slightly deformed casing is reshaped by using the shuttle type well gauge 22, so that the slightly deformed casing is restored to its original shape.

It should be noted that the shuttle shape refers to a shape with two pointed ends and a thick middle. The well gauge is a special tool for detecting the size of downhole tubular objects. It is mainly used to detect whether the inner diameter of the casing, oil pipe, drill pipe, etc. meets the standard, and check the maximum geometric size that can pass through after the casing is deformed. The structure of the shuttle-type well gauge 22 in this embodiment is preferably a shuttle-type structure with the same size at both ends.

Specifically, the shuttle-type well gauge 22 is slightly smaller than the diameter of the normal casing in the well of the oil and gas field, so that the shuttle-type well gauge 22 can pass through the casing in the well of the oil and gas field smoothly. casing.

It should be noted that the maximum outer diameter of the shuttle-type well gauge 22 is slightly smaller than the diameter of the normal casing in the oil and gas field well, but it cannot be too smaller than the diameter of the normal casing in the oil-gas field well, because the maximum outer diameter of the shuttle-type well gauge 22 is too small If not, the micro-deformation sleeve cannot be expanded, and the shaping of the micro-deformation sleeve cannot be realized. The specific maximum diameter of the shuttle-type well gauge 22 is determined according to the size of the normal casing in the oil and gas field well in actual operation. Reshaping is enough, and this embodiment does not limit it here.

The fishing tool 23 is connected with the other end of the shuttle gauge 22, and is used for fishing the downhole pipe string 12 falling into the well of the oil and gas field.

It should be noted that the fishing tool 23 is not limited to fishing the downhole pipe string 12 that fell into the well of the oil and gas field, and can also salvage other tools that fell into the well of the oil and gas field. The fishing tool 23 can be a tubular fishing tool or a rod fishing tool. Specifically, the shape of the fishing tool 23 can be determined according to the shape of the top of the downhole string 12 in the well of the oil and gas field, the state of the downhole string 12, and the size of the casing. selection, which is not limited in this embodiment.

The maximum diameter of the shuttle gauge 22 is larger than the maximum diameters of the drilling tool 21 and the fishing tool 23 .

Specifically, the maximum diameter of the shuttle-type well gauge 22 is greater than the maximum diameter of the drilling tool 21 and the fishing tool 23, and greater than the maximum diameter of the drop-hole string 12, ensuring that the outer diameter of the shuttle-type well gauge 22 in the shaping and fishing string is the largest. , so that after the shuttle type well gauge 22 realizes the casing of the oil and gas field well, the entire shaping and salvage string can pass through the casing of the oil and gas field well without the risk of jamming of the shaping and fishing string.

It should be noted that the risk of stuck shaping and fishing string refers to the fact that a part of the shaping and fishing string can pass through the casing of the oil and gas field well, while other parts cannot pass through the casing of the oil and gas field well, so that the whole shaping and fishing string is stuck in the oil and gas field well. casing.

Optionally, the centers of the drilling tool 21, the shuttle gauge 22, and the fishing tool 23 are located on the same axis.

The shaping and salvage string provided in this embodiment, in specific use, the shaping and fishing string is lowered into the well of the oil and gas field, and the drilling tool 21 sends the shuttle-type well gauge 22 to the predetermined position in the oil and gas field well. Check the inner diameter of the casing of the water well to know whether the wellbore of the oil and gas field can be smoothly inserted into the fishing tool 23, so as to realize the casing drilling of the oil and gas field well by the shaping and salvage string. Continue to lower the shaping and fishing string, and the drilling tool 21 sends the shuttle-type well gauge 22 to the 11 well section with slight deformation of the casing. 22 It is found that the inner diameter of the casing in oil and gas field wells is smaller than the maximum outer diameter of the shuttle gauge, and the shuttle gauge 22 passes through the slightly deformed casing repeatedly to expand the inner diameter of the slightly deformed casing and shape the slightly deformed casing , to restore the slightly deformed casing to its original shape, and to realize the casing shaping of oil and gas field wells by shaping the salvage string. When the micro-deformed casing at the casing micro-deformed well section 11 is restored to its original shape, continue to lower the shaping and salvage string, the drilling tool 21 sends the shuttle-type well gauge 22 to the oil and gas field drop-well string 12, and the fishing tool 23 pulls the down-hole casing The column 12 is salvaged to realize the salvage of the downhole pipe string 12 of the oil and gas field well by the fishing tool 23 .

In the shaping and fishing string provided in this embodiment, one end of the shuttle-type well gauge 22 is connected to the drilling tool 21, and the other end is connected to the fishing tool 23. The well gauge 22 is used for casing drilling and micro-deformation casing shaping of oil and gas field wells, and the fishing tool 23 is for the salvage of falling well string 12, realizing casing drilling and micro-deformation casing shaping of oil and gas field wells at one time by shaping and fishing strings and salvage the downhole string 12, so that the workover period is shortened, and the cost of the workover operation is reduced.

Figure 3 is a schematic structural view of the shuttle-type well gauge provided by the embodiment of the present invention, as shown in Figure 3, and Figure 3 is based on the embodiment shown in Figure 2, the shuttle-type well gauge 22 includes: an upper joint 221 , the main body 220 and the lower joint 222.

The upper joint 221 is located at the upper end of the body 220 , the lower joint 222 is located at the lower end of the main body 220 , and the centers of the upper joint 221 , the main body 220 and the lower joint 222 are located on the same axis.

Optionally, the body 220 includes a straight portion 2201 and an arc portion 2202 located at both ends of the straight portion 2201 , the upper joint 221 is located on the arc portion 2202 at one end of the straight portion 2201 , and the lower joint 222 is located at the other end of the straight portion 2201 on the arc portion 2202 of the

Optionally, the diameter of the arc portion 2202 is smaller than the diameter of the straight portion 2201 .

Specifically, the body 220 includes a straight portion 2201 and an arc portion 2202 located at both ends of the straight portion 2201. The diameter of the arc portion 2202 is smaller than the diameter of the straight portion 2201, so that the shuttle type well gauge 22, the shuttle type well gauge The upper and lower parts of the main body 220 of 22 have been reduced in diameter, so that the shaping and fishing string can pass through the casing of the oil and gas field well without the risk of jamming the shaping and fishing string.

Optionally, internal threads are provided on the inner wall of the upper joint 221 , and the internal threads are used for connecting the drilling tool 21 .

External threads are provided on the outer wall of the lower joint 222 , and the external threads are used for connecting the fishing tool 23 .

Specifically, in the shaping and fishing string provided in this embodiment, the internal thread on the inner wall of the upper joint 221 in the shuttle gauge 22 is connected to the drilling tool 21, and the external thread on the outer wall of the lower joint 222 is connected to the fishing tool 23, so that the shaping When the fishing string is in use, it can be used by connecting the drilling tool 21, the shuttle type well gauge 22 and the fishing tool 23; when not in use, the drilling tool 21, the shuttle type well gauge 22, the fishing tool 23 The three are disassembled and separated.

In the shaping and fishing string provided in this embodiment, on the basis of the above embodiments, the shuttle gauge 22 includes an upper joint 221, a body 220 and a lower joint 222, and the diameter of the arc portion 2202 of the body 220 is smaller than that of the straight portion. The diameter of 2201 enables the shaping and salvage string to pass through the casing of oil and gas field wells smoothly, avoiding the risk of jamming of the shaping and fishing string. At the same time, the upper joint 221 is connected to the drilling tool 21 through the internal thread, and the lower joint 222 is connected to the fishing tool 23 through the external thread, so that when the shaping and fishing string is in use, the drilling tool 21, the shuttle-type well gauge 22, and the fishing tool 23 The three are connected and can be used; when not in use, the drilling tool 21, the shuttle type well gauge 22 and the fishing tool 23 can be disassembled and separated.

In an embodiment of the present invention, the body 220 is made of steel, and the steel grade of the body 220 is higher than that of the well casing.

Specifically, the steel grade of the shuttle-type well gauge 22 is higher than that of the casing, which is used to prevent the casing from squeezing the shuttle-type well-type gauge 22 and causing deformation, which makes the shuttle-type well-type gauge 22 unusable.

In one embodiment of the utility model, the drilling tool 21, the shuttle gauge 22, and the fishing tool 23 are all hollow, and the lower port of the fishing tool 23 is provided with a water hole (not shown).

Specifically, the drilling tool 21, the shuttle type well gauge 22, and the fishing tool 23 are all hollow, and the water used in the water pump flows out from the water hole through the drilling tool 21, the shuttle type well gauge 22, and the fishing tool 23 respectively.

The water eye is a through hole opened at the lower port of the fishing tool 23 along the axis, and the water eye is used for flushing the debris at the bottom of the oil and gas field well or the debris at the top of the downhole string 12 .

In one embodiment of the utility model, the diameter of the water eye is 8-12 millimeters (mm).

Fig. 4 is a structural schematic diagram of the shaping and salvage string provided by the embodiment of the utility model to run into the slightly deformed section of the casing, and Fig. 5 is the structure of the shaping and salvage string provided by the embodiment of the utility model to repair the slightly deformed section of the casing and salvage the downhole string Fig. 6 is a schematic structural diagram of a water well in an oil and gas field provided by an embodiment of the present invention after the downhole string is salvaged. As shown in Figures 4-6, when the shaping and fishing string provided by the utility model is specifically used, first, the drilling tool 21, the shuttle-type well gauge 22, and the fishing tool 23 are connected on the ground. Secondly, the workover rig is used to provide power, and the shaping and fishing string is lowered into the well section 11 above 30 meters (m) with slightly deformed casing. Then, wash the well with positive circulation, and slowly pressurize, and rotate up and down to shape and lower the salvage string until it passes through the slightly deformed well section 11 of the casing. Again, continue to lower the shaping and fishing string, and fish the downhole string 12 below the slightly deformed well section 11 of the casing according to the operation rules of the fishing tool 23 . Finally, after the fishing tool 23 fishes the downhole string 12, the shaping and fishing string is pulled out.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (10)

1. a shaping fishing string, is characterized in that, comprising: drilling tool, shuttle-type drift size gauge tool, fishing tool;

Described shuttle-type drift size gauge tool one end connects described drilling tool, and the other end connects described fishing tool;

The maximum gauge of described shuttle-type drift size gauge tool is greater than the maximum gauge of described drilling tool and described fishing tool.

2. shaping fishing string according to claim 1, is characterized in that, being centrally located on same axis of described drilling tool, described shuttle-type drift size gauge tool, described fishing tool.

3. shaping fishing string according to claim 1, is characterized in that, described shuttle-type drift size gauge tool comprises: top connection, body and lower contact;

Described top connection is positioned at the upper end of described body, and described lower contact is positioned at the lower end of described body, described top connection, being centrally located on same axis of described body and described lower contact.

4. shaping fishing string according to claim 3, it is characterized in that, described body comprises straight section portion and is positioned at the curved portions at two ends, described straight section portion, and described top connection is positioned in the curved portions of one end, described straight section portion, and described lower contact is positioned in the curved portions of the described straight section portion other end.

5. shaping fishing string according to claim 4, is characterized in that, the diameter of described curved portions is less than the diameter in described straight section portion.

6. shaping fishing string according to claim 5, is characterized in that, described body adopts steel matter, and the grade of steel of described body is greater than the grade of steel of borehole wall sleeve pipe.

7. shaping fishing string according to claim 6, is characterized in that, described top connection inwall is provided with internal thread, and described internal thread is for connecting described drilling tool;

The outer wall of described lower contact is provided with external screw thread, and described external screw thread is for connecting described fishing tool.

8. the shaping fishing string according to any one of claim 1-7, is characterized in that, described drilling tool is drilling rod.

9. the shaping fishing string according to any one of claim 1-7, is characterized in that, described drilling tool, described shuttle-type drift size gauge tool, described fishing tool are all hollow, and the lower port of described fishing tool is provided with hydrophthalmia.

10. shaping fishing string according to claim 9, is characterized in that, the diameter of described hydrophthalmia is 8-12mm.