阅读说明：本技术 一种油水井内管类落物全尺寸打捞矛及打捞方法 (Full-size fishing spear and fishing method for pipe falling objects in oil-water well ) 是由 梁东平 郭超英 张宏群 赵佰承 张耀辉 于 2020-07-14 设计创作，主要内容包括：本发明属于油田井下作业打捞工具技术领域,具体涉及一种油水井内管类落物全尺寸打捞矛及打捞方法。本发明包括接头、一级矛杆、二级矛杆和三级矛杆；所述的接头、一级矛杆、二级矛杆和三级矛杆从上至下依次连接。本发明采用三级不同尺寸矛杆组合,打捞范围为Φ46mm～Φ65mm,明显大于普通滑块捞矛的Φ59mm～Φ65mm的打捞范围。本发明将多种不同直径的滑块打捞矛的矛杆,从小到大用螺纹连接在一起,使其具有更大的打捞范围,还可以根据落物内径大小进行适配。本发明中的滑块卡瓦与油管壁的接触面积比普通滑块捞矛增加了约1倍,有效降低了对油管的压力,减少了待打捞油管壁破裂的风险。(The invention belongs to the technical field of fishing tools for oil field downhole operation, and particularly relates to a full-size fishing spear and a fishing method for pipe falling objects in an oil-water well. The invention comprises a joint, a primary lance, a secondary lance and a tertiary lance; the joint, the primary lance, the secondary lance and the tertiary lance are sequentially connected from top to bottom. The invention adopts three-level different-size lance combination, the fishing range is phi 46 mm-phi 65mm, which is obviously larger than the fishing range of phi 59 mm-phi 65mm of the common sliding block fishing spear. The spear of the sliding block fishing spears with different diameters is connected together by threads from small to large, so that the fishing spear has a larger fishing range and can be adapted according to the inner diameter of a falling object. The contact area between the sliding block slips and the wall of the oil pipe is increased by about 1 time compared with that of a common sliding block fishing spear, so that the pressure on the oil pipe is effectively reduced, and the risk of the wall of the oil pipe to be fished being broken is reduced.)

1. The utility model provides a full-scale trip spear of intraductal class junk in profit well which characterized in that: comprises a joint (1), a primary lance (2), a secondary lance (4) and a tertiary lance (5); the connector (1), the primary lance (2), the secondary lance (4) and the tertiary lance (5) are sequentially connected from top to bottom.

2. The full-size fishing spear for pipe falling objects in an oil-water well as defined in claim 1 is characterized in that: the side walls of the first-level lance (2), the second-level lance (4) and the third-level lance (5) are provided with sliding grooves, one side face of each sliding groove is perpendicular to the central shaft of the lance, the other side face of each sliding groove is obliquely arranged, a shoulder is arranged at the joint of the two side faces of each sliding groove, a raised slide way (6) is arranged at the axial center of the inclined side face of each sliding groove, one end of each slide way (6) is connected to the joint of the two side faces of each sliding groove, the other end of each slide way (6) is fixedly connected with a locking block (7), and each slide way (6) is connected with.

3. The full-size fishing spear for pipe falling objects in an oil-water well as defined in claim 2, is characterized in that: the axial section of the sliding block slip (3) is an obtuse triangle; the upper surface of the sliding block slip (3) is provided with teeth; the outer diameter of the connecting part of the slideway (6) and the other side surface is gradually increased.

4. The full-size fishing spear for pipe falling objects in an oil-water well as defined in claim 2, is characterized in that: the sliding block slips (3) are provided with grooves matched with the slide ways (6), and the slide ways (6) are connected with the grooves in the sliding block slips (3).

5. The full-size fishing spear for pipe falling objects in the oil-water well as defined in any one of claims 4, is characterized in that: the groove is in an isosceles trapezoid shape, and the side length of the lower bottom of the groove is larger than that of the upper bottom of the groove.

6. The full-size spear for fishing pipe falling objects in the oil-water well as claimed in any one of claims 1 or 2, wherein: the primary lance (2), the secondary lance (4) and the tertiary lance (5) are reduced in outer diameter size in order.

7. The full-size fishing spear for pipe falling objects in the oil-water well as defined in claim 6 is characterized in that: the primary lance (2), the secondary lance (4) and the tertiary lance (5) are respectively phi 55mm, phi 50mm and phi 45mm in outer diameter.

8. The full-size fishing spear for pipe falling objects in the oil-water well as defined in claim 6 is characterized in that: the connector (1), the primary lance (2), the connecting part, the secondary lance (4) and the tertiary lance (5) are connected through threads at two ends.

9. The full-size fishing spear for pipe falling objects in an oil-water well as defined in claim 1 is characterized in that: the buckle type of the joint (1) is 210 reverse buckles.

10. The method for fishing the full-size fishing spear for the pipe falling objects in the oil-water well as claimed in any one of claims 1 to 9, is characterized in that: comprises the following steps;

the method comprises the following steps: connection of fishing spears

Sequentially connecting a joint (1), a primary lance (2), a connecting part, a secondary lance (4) and a tertiary lance (5) of the full-size fishing spear for the pipe falling objects in the oil-water well from top to bottom, connecting the upper part of the joint (1) with a drill rod, and connecting the lower part of the tertiary lance (5) with a guide shoe;

step two: go into the well

Slowly descending the full-size fishing spear for the pipe falling objects in the oil-water well, which are connected in the step one, into the well; when the full-size fishing spear for the pipe falling objects in the oil-water well and the single drill rod are all put into the well, the drill rod is continuously connected to the upper joint of the single drill rod and slowly put into the well; repeating the operation until the full-size fishing spear for the pipe falling objects in the oil-water well is put into the well to be fished;

step three: fishing

The full-size fishing spear for the pipe falling objects in the oil-water well automatically matches with a certain level of the three-level spear rods to perform fishing according to the inner diameter of the oil pipe to be fished; when the matched spear rod enters the inner cavity of the oil pipe to be salvaged, the sliding block slips (3) on the matched spear rod slide downwards by means of self weight, the sliding block slips (3) and the slide way (6) generate relative displacement, the distance between the tooth surface of the sliding block slips (3) and the central line of the spear rod is increased, and the salvage size of the sliding block slips is gradually increased until the sliding block slips are contacted with the inner wall of the oil pipe to be salvaged;

step four: quit

And lifting the spear, and under the action of gravity of the oil pipe, the sliding block slips (3) on the spear matched with the oil pipe to be salvaged enable the sliding block slips (3) to slide downwards, so that the distance between the tooth surface of the sliding block slips (3) and the central line of the spear is continuously increased, the tightness between the sliding block slips (3) and the inner wall of the oil pipe to be salvaged is continuously enhanced, and the oil pipe to be salvaged is salvaged out of the oil well along with continuous lifting of the full-size fishing spear for pipe falling objects in the oil well.

Technical Field

The invention belongs to the technical field of fishing tools for oil field downhole operation, and particularly relates to a full-size fishing spear and a fishing method for pipe falling objects in an oil-water well.

Background

In the fishing operation of oil-water wells, pipe falling objects are often fished by using tools such as a sliding block fishing spear and a male cone, but the fishing tool has many problems in use.

The male tap is used for fishing, and the fishing tool has the advantages that the use range is wider, and can be used for fishing pipe falling objects with different inner diameters by making buckles; the disadvantage is that the back-off operation is carried out while making the button, and the falling objects in the well are very easy to be turned into the parts.

The sliding block fishing spear is used for fishing, and the fishing device has the advantages that the fishing reliability is high, and generally, falling objects in a well cannot be poured into parts; the disadvantage is that the fishing range is small due to the limited size of the lance.

In addition, because the data such as the model, the inner diameter size and the like of the pipe falling objects in the well are not mastered in detail, fishing tools of different models are often required to be printed or tentatively put into the ground for fishing, the working procedures are multiple, the operation risk is high, and the fish top is easy to be damaged.

Disclosure of Invention

The invention provides a full-size fishing spear and a fishing method for pipe falling objects in an oil-water well, and aims to provide a fishing spear which can perform one-time fishing under the condition that the data such as the model, the inner diameter size and the like of the pipe falling objects in the well are not mastered in detail, avoid the complex operations such as printing, tool selection and the like required by conventional fishing, and achieve the purposes of saving the operation time and the operation cost.

The technical scheme adopted by the invention is as follows:

a full-size fishing spear for pipe falling objects in an oil-water well comprises a joint, a primary spear, a secondary spear and a tertiary spear; the joint, the primary lance, the secondary lance and the tertiary lance are sequentially connected from top to bottom.

The side walls of the first-level lance, the second-level lance and the third-level lance are respectively provided with a sliding chute, one side surface of each sliding chute is perpendicular to the central shaft of the lance, the other side surface of each sliding chute is obliquely arranged, a shoulder is arranged at the joint of the two side surfaces of each sliding chute, a raised slideway is arranged at the axial center of the oblique sliding chute side surface, one end of each slideway is connected with the other side surface of each sliding chute, the other end of each slideway is fixedly connected with a locking block, and a sliding block slip is connected onto each slideway in; the shaft section of the sliding block slip is an obtuse triangle.

The upper surface of the sliding block slip is provided with teeth; the outer diameter of the connecting part of the slideway and the other side surface is gradually increased.

The sliding block slips are provided with grooves matched with the slide ways, and the slide ways are connected with the grooves in the sliding block slips.

The groove is in an isosceles trapezoid shape, and the side length of the lower bottom of the groove is larger than that of the upper bottom of the groove.

The primary lance, the secondary lance and the tertiary lance are reduced in outer diameter size in this order.

The primary lance, the secondary lance and the tertiary lance have outer diameter sizes of phi 55mm, phi 50mm and phi 45mm respectively.

The connector, the primary lance, the connecting part, the secondary lance and the tertiary lance are connected through threads.

The buckle type of the joint is 210 left-hand buckles.

A fishing method for a full-size fishing spear for pipe falling objects in an oil-water well comprises the following steps

The method comprises the following steps: connection of fishing spears

Sequentially connecting a joint, a primary lance, a connecting part, a secondary lance and a tertiary lance of the full-size fishing lance for the pipe falling objects in the oil-water well from top to bottom, connecting the upper part of the joint with a drill rod, and connecting the lower part of the tertiary lance with a guide shoe;

step two: go into the well

Slowly descending the full-size fishing spear for the pipe falling objects in the oil-water well, which are connected in the step one, into the well; when the full-size fishing spear for the pipe falling objects in the oil-water well and the single drill rod are all put into the well, the drill rod is continuously connected to the upper joint of the single drill rod and slowly put into the well; repeating the operation until the full-size fishing spear for the falling objects of the oil-water well pipes is lowered into the position of the top of the oil pipe in the well;

step three: fishing

The full-size fishing spear for the pipe falling objects in the oil-water well automatically matches with a certain level of the three-level spear rods to perform fishing according to the inner diameter of the oil pipe to be fished; when the matched spear rod enters the inner cavity of the oil pipe to be salvaged, the sliding block slips on the matched spear rod slide downwards by means of self weight, the sliding block slips and the slide way generate relative displacement, the distance between the tooth surface of the sliding block slips and the central line of the spear rod is increased, and the salvage size of the sliding block slips is gradually increased until the sliding block slips is contacted with the inner wall of the oil pipe to be salvaged;

step four: quit

And lifting the spear rod, and enabling the sliding block slips to slide downwards under the action of gravity of the oil pipe under the action of the sliding block slips on the spear rod matched with the oil pipe to be salvaged, so that the distance between the tooth surface of the sliding block slips and the central line of the spear rod is continuously increased, the tightness of the sliding block slips in contact with the inner wall of the oil pipe to be salvaged is continuously increased, and the oil pipe to be salvaged is salvaged out of the oil well along with continuous lifting of the full-size fishing spear of the.

Has the advantages that:

(1) the fishing range is enlarged. The spear diameter of the common sliding block fishing spear is phi 58mm, and the fishing range is phi 59 mm-phi 65 mm. The invention adopts three-level combination, the minimum first-level lance size is phi 45mm, and the salvage range is phi 46 mm-phi 52 mm; the second-stage lance is phi 50mm in size, and the salvage range is phi 51 mm-phi 59 mm; the third-level lance is phi 55mm in size, and the fishing range is phi 56 mm-phi 66mm, so that the total fishing range of the tool is phi 46 mm-phi 66mm, which is obviously larger than that of a common sliding block fishing spear.

(2) The fishing efficiency is improved. The spears of the sliding block fishing spears with different diameters are connected together by the NC16 threads from small to large, the spears are automatically adapted according to the inner diameter of the inner cavity of the oil pipe in the fishing process, any one-level spear can be successfully fished after entering the inner cavity of the oil pipe, and the fishing success rate is higher compared with that of the fishing spears of a conventional single-level spear.

(3) Is safer and more reliable. The contact area between the slide block slips of the obtuse triangle and the oil pipe wall is increased by about 1 time compared with that of a common slide block fishing spear, the pressure on the oil pipe wall is reduced, and the risk of the rupture of the oil pipe wall is effectively reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a top view of the structure of the present invention;

FIG. 3 is a schematic view of the slider slip construction of the present invention;

FIG. 4 is a cross-sectional view B-B of FIG. 3;

FIG. 5 is a bottom view of FIG. 3;

fig. 6 is an illustration of the primary, secondary and tertiary lances of the present invention.

In the figure: 1-a linker; 2-primary lance; 3-a slide block slip; 4-a secondary lance; 5-a third-level lance; 6-a slideway; 7-locking block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.