Fishing device for oilfield downhole operation

A fishing device and technology for oil field wells, which are applied in wellbore/well parts, earthwork drilling and production, etc., can solve problems such as stuck pipe, time-consuming and laborious, and difficulty in fishing small objects, and achieve the effect of convenient fishing

Inactive Publication Date: 2020-11-17
胡渭烽
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AI-Extracted Technical Summary

Problems solved by technology

[0002] Oil and natural gas are buried in oil and gas layers tens of meters to thousands of meters underground. To extract them, an oil and gas channel needs to be established between the surface and the underground oil and gas layers. This channel is the oil field well. During the underground operation of the oil field , there are often blanking materials falling into the well, such ...
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Method used

4, the outer wall of salvage case 5-1 upper side is fixed with circular slide rail 13, and the arc slide block 12 on the circular slide rail 13 is protected by connecti...
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Abstract

The invention discloses a fishing device for oil field downhole operation, and relates to the technical field of oil field well operation auxiliary equipment. The fishing device comprises a fixing plate, fixing rods, a lifting mechanism, a first motor and a salvaging mechanism, the fixing rods are fixed to the front side and the rear side of the lower surface of the fixing plate, limiting rods areinserted into the left ends and the right ends of the fixing rods and fixed through bolts, the other ends of the limiting rods are arranged in a triangular cone shape, the lifting mechanism is arranged on the lower side of the fixing plate, a first motor is fixed to the lower surface of a lifting plate in the lifting mechanism and connected with an external power source, an output shaft of the first motor is fixedly connected with the outer side wall of the upper side of a fishing box in the fishing mechanism, a balancing weight is fixed to the outer side wall of the lower side of the fishingbox and arranged in an inverted triangular cone shape, and a plurality of scrapers are equiangularly fixed on the lower side of the outer ring wall of the balancing weight. When reaching the lowermost side of an oil field well, the fishing device can extend out for fishing, so that the fishing device can enter from a wellhead conveniently, time and labor are saved during fishing, and the fishingdevice has the advantages of reasonable arrangement, low manufacturing cost and the like.

Application Domain

Borehole/well accessories

Technology Topic

Electric machineryWellhead +4

Image

  • Fishing device for oilfield downhole operation
  • Fishing device for oilfield downhole operation
  • Fishing device for oilfield downhole operation

Examples

  • Experimental program(1)

Example Embodiment

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0025] Such as Figure 1-Figure 5 As shown, this specific embodiment adopts the following technical solutions: it includes a fixed plate 1, a fixed rod 2, a lifting mechanism 3, a No. 1 motor 4 and a fishing mechanism 5. The fixed rods are welded and fixed on both front and rear sides of the lower surface of the fixed plate 1 2. Limiting rods 6 are inserted into the left and right ends of the fixed rod 2 and fixed by bolts. The other end of the limiting rod 6 is arranged in a triangular cone shape. The lower side of the fixed plate 1 is provided with a lifting mechanism 3 for lifting On the lower surface of the lifting plate 3-1 in the mechanism 3, a motor 4 is fixed by bolts. The motor 4 is connected to an external power source. The model of the motor 4 is 40KTYZ. The lifting mechanism 3 also contains the motor 3 2. Screw 3-3, rotating wheel 3-4 and internally threaded tube 3-5, the model of the second motor 3-2 is 40KTYZ, the second motor 3-2 is fixed on the left front side of the upper surface of the fixed plate 1 by bolts, The four corners of the lower surface of the fixed plate 1 are all screwed with screws 3-3 through bearings. The bearings are embedded in the four corners of the fixed plate 1, and the outer ring is welded to the inner side walls of the four corners of the fixed plate 1, and the inner rings are respectively It is welded and fixed with the upper ends of the four screws 3-3. The top of the left front screw 3-3 is welded and fixed with the output shaft of the second motor 3-2. The lower ends of the screw 3-3 pass through the rotating wheels 3-4, After the internally threaded pipe 3-5, it is suspended on the left and right sides of the salvage box 5-1. The four rotating wheels 3-4 are connected by a transmission belt, and the center of the rotating wheel 3-4 is welded to the screw 3-3. The external thread of the screw 3-3 is screwed to the internal thread of the internal threaded tube 3-5, and the four internally threaded tubes 3-5 are respectively inserted and welded and fixed in the four corners of the lifting plate 3-1. The bottom end of the screw 3-3 The limit block 9 is fixed by welding, and the limit block 9 is respectively suspended on the left and right sides of the counterweight 7 to prevent the internally threaded tube 3-5 from falling off the screw 3-3;
[0026] The outer cover of the No. 1 motor 4 is provided with a No. 1 protective cover 10. The upper side of the No. 1 protective cover 10 is welded and fixed on the lower surface of the lifting plate 3-1, and the lower side wall of the No. 1 protective cover 10 is sleeved on the No. 1 The output shaft of the motor 4 is screwed through a sealed bearing. The sealed bearing is embedded in the lower side wall of the No. 1 protective cover 10, and its outer ring is welded and fixed to the inner side wall of the No. 1 protective cover 10. The inner ring is welded and fixed to the output shaft of the No. 1 motor 4, and the outer side walls of the left and right sides of the No. 1 protective cover 10 are welded and fixed with connecting rods 11. The connecting rods 11 are arranged in an "L" shape, and the vertical connecting rods 11 The lower end of the rod is welded and fixed with an arc-shaped sliding block 12, which is slidably arranged on a circular sliding rail 13. The circular sliding rail 13 is fixed on the outer side wall of the upper side of the fishing box 5-1 by bolts, which can increase The stability of the salvage box 5-1, the output shaft of the No. 1 motor 4 is welded and fixed to the outer side wall of the upper side of the salvage box 5-1 in the salvage mechanism 5. The salvage mechanism 5 also includes the No. 3 motor 5-2 and the rotating rod 5. -3. Fishing net 5-4 and battery 5-5, No. 3 motor 5-2 is bolted to the inner wall of the lower side of the salvage box 5-1, the model of No. 3 motor 5-2 is 30KTYZ, and the No. 3 motor The outer cover of 5-2 is provided with a No. 2 protective cover 17. The lower side of the No. 2 protective cover 17 is welded and fixed on the inner side wall of the lower side of the salvage box 5-1. The rear side wall of the No. 2 protective cover 17 is sleeved with three The output shaft of motor 5-2 is screwed through a sealed bearing. The bearing is embedded on the rear side wall of the second protective cover 17, and its outer ring is welded to the inner side wall of the second protective cover 17 , Can increase the service life of the third motor 5-2, the third motor 5-2 is connected with the battery 5-5, the battery 5-5 is embedded in the counterweight 7, and the output shaft of the third motor 5-2 is welded and fixed There is a rotating rod 5-3, the rotating rod 5-3 is composed of a sleeve 5-3-1 and a plunger 5-3-2, the lower end of the sleeve 5-3-1 and the output shaft of the third motor 5-2 Welding and fixing, the inside of the sleeve 5-3-1 is provided with a spring 14, the lower end of the spring 14 is welded and fixed on the upper surface of the baffle 15, the outer edge of the baffle 15 and the inner peripheral wall of the sleeve 5-3-1 Welding and fixing, the upper end of the spring 14 is welded and fixed to the lower end of the plunger 5-3-2. The upper end of the plunger 5-3-2 passes through the upper end of the sleeve 5-3-1 and is connected to the left of the fishing net 5-4. The side is welded and fixed. When in use, according to the inner diameter of the oil field well, the spring 14 drives the plunger 5-3-2 to move, so that the top of the plunger 5-3-2 abuts against the inner wall of the oil well, the plunger 5-3 -2 drives the fishing net 5-4 to move to the outside during the movement, increasing the fishing area of ​​the fishing net 5-4. The right side of the fishing net 5-4 is suspended on the upper side of the fishing box 5-1. The outer frame of the net 5-4 is welded and fixed with a magnet strip 16, which can facilitate the salvage of metal materials when salvaging. The upper side of the right side wall of the salvage box 5-1 is provided with an opening 5-6. The lower side of the right side wall of 5-1 is provided with a groove 5-7, the groove 5-7 is arranged on the lower side of the opening 5-6, and the outer side wall of the lower side of the fishing box 5-1 is welded A counterweight 7 is fixed, and the counterweight 7 is arranged in an inverted triangular cone shape, and several scrapers 8 are fixed on the lower side of the outer ring wall of the counterweight 7 by equiangular welding;
[0027] The working principle of this embodiment: when in use, first move the device to loosen the bolts at both ends of the fixed rod 2, and then pull out the limit rods 6 on both sides to the outside, and pull the outer end of the limit rod 6 The resistance on the inner wall of the well, and then start the second motor 3-2, the second motor 3-2 drives one of the screw 3-3 to rotate, the screw 3-3 drives the rotating wheel 3-4 on it to rotate, the rotating wheel 3-4 drives the other three rotating wheels 3-4 to rotate through the transmission belt. The three rotating wheels 3-4 respectively drive the internal screw 3-3 to rotate, and the four screws 3-3 simultaneously drive the internal threaded tube 3 on each. -5 Move down until the counterweight 7 hits the bottom of the well, then start No. 3 motor 5-2, No. 3 motor 5-2 drives the rotating rod 5-3 to rotate 90°, and the rotating rod 5-3 drives the fishing net 5 -4 rotates 90°, at this time the fishing net 5-4 is located on the side of the counterweight 7, and then start the second motor 3-2, the second motor 3-2 drives the fishing box 5-1 to rotate, and the fishing box 5-1 The rotating rod 5-3 is driven to rotate, the rotating rod 5-3 drives the fishing net 5-4 to rotate, and the falling material is salvaged through the fishing net 5-4. At the same time, the salvage box 5-1 also drives the counterweight 7 to rotate. The counterweight 7 drives the scraper 8 to rotate. When the scraper 8 rotates, it pushes the falling material at the center of the well bottom to the outside, and then the fishing net 5-4 is used for fishing.
[0028] After adopting the above structure, the beneficial effects of this embodiment are as follows:
[0029] 1. When reaching the bottom of the oil field well, it can be extended for fishing, so as to facilitate entry from the wellhead, saving time and effort when fishing;
[0030] 2. After entering the oil field well, the lifting mechanism 3 drives the fishing box 5-1 to move up and down, so as to facilitate fishing according to oil field wells of different depths, and avoid the shaking of the fishing box 5-1 when the rope is pulled, and the fishing cannot be carried out;
[0031] 3. After the fishing box 5-1 enters the bottom of the well, the fishing net 5-4 in the fishing box 5-1 extends out of the fishing box 5-1, and then the No. 1 motor 4 drives the fishing box 5-1 to rotate, which is convenient The fishing net 5-4 is used to salvage the falling material at the bottom of the well, and while the fishing box 5-1 is rotating, the scraper 8 on the outer side wall of the counterweight 7 on the lower side of the fishing box removes the material at the bottom of the well. Dial to the side to facilitate salvage
[0032] 4. A circular slide rail 13 is fixed on the outer side wall of the upper side of the salvage box 5-1, and the arc slider 12 on the circular slide rail 13 is connected to the No. 1 protective cover 10 outside the No. 1 motor 4 through a connecting rod 11 , Can increase the stability of the salvage box 5-1 without affecting the rotation of the salvage box 5-1.
[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible for those skilled in the art to modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some of the technical features. Within the spirit and principle of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

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Description & Claims & Application Information

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