Orientation instrument fishing tool

Abstract

The utility model discloses a directional instrument fishing tool which comprises a drill rod, a fishing rod is arranged in the drill rod, a fisher is arranged at the bottom end of the fishing rod, a directional instrument is arranged at the bottom end of the fisher, an anti-falling ring, a screw buckle pressing cap and an anti-falling pin are sequentially arranged at the top end of the fishing rod from bottom to top, and a plurality of round holes are formed in the anti-falling ring in a surrounding mode. The fishing rod penetrates through a middle hole of the anti-falling ring and is sleeved with the screw buckle pressing cap, and the fishing rod is sleeved with the anti-falling pin and is located on the screw buckle pressing cap; the fishing rod is sleeved with a spring, one end of the spring is connected with the anti-falling ring, and the other end of the spring is connected with the fisher. The device can be directly combined with an on-site drilling tool for use, and an oil pumping rod does not need to be rented or purchased to be matched with a drilling rod for use. The combined tool is simple and convenient in manufacturing process, can be processed on site, is easy to operate, and is also verified in construction practice.

Description

TECHNICAL FIELD

[0001] The utility model relates to fishing technical field especially relates to a directional instrument fishing tool. BACKGROUND

[0002] Directional drilling construction is more and more popular in the field of drilling, and has been widely applied in oil drilling, geothermal drilling, pipeline non-excavation, coal mine water prevention and control area treatment and the like. Directional well construction mainly relies on the while-drilling inclinometer (referred to as directional instrument) to carry out drilling trajectory control, and the directional instrument is generally composed of a pulse generator, a battery cylinder, a gamma probe, a directional probe and a centralizer. The length of the directional instrument is generally about 5-6 meters, and the instrument structure is precise and the cost is high. The directional drilling tool assembly is sequentially arranged from bottom to top as drill bit-screw-no-magnetic short section-no-magnetic drill collar-drill pipe. During drilling construction, the directional instrument is generally placed in the no-magnetic short section and the no-magnetic drill collar to work, and the no-magnetic short section is provided with a circulating sleeve, and the directional instrument is arranged in the circulating sleeve. The drilling tool is often affected by some factors to cause breakage, and the main influencing factors include that the drilling tool is used for too long to exceed the fatigue life, the geological condition is complex, the hole diameter factor, the directional curvature radius and the screw connection and the like. During drilling, the screw, the no-magnetic short section and the no-magnetic drill collar in the well are the most stressed, and the breakage is prone to occur at the screw connection, the no-magnetic short section and the screw, the directional instrument will be taken out of the well with the no-magnetic short section and the drill collar. When the no-magnetic short section and the no-magnetic drill collar are broken, the instrument will be left in the well with the no-magnetic short section, and the directional instrument fishing generally adopts the oil rod to fish the instrument through the inside of the well. The diameter of the directional instrument is 50mm, which is greatly different from the hole diameter. When the directional instrument falls in the well and is exposed outside, the fishing is difficult, and the use of the oil rod is limited or the oil rod cannot be timely adjusted and transported to fish. The fishing tool can be directly combined with the on-site drill pipe to fish, the tool is simple to process, reliable and practical, and the accident can be timely handled. The fishing tool is suitable for various drilling holes, such as straight well, small well deviation, large well deviation and horizontal well and the like. CONTENT OF THE UTILITY MODEL

[0003] In view of the deficiencies existing in the above problems, the utility model provides a directional instrument fishing tool.

[0004] In order to achieve the above object, the utility model provides a directional instrument fishing tool, which comprises a drill pipe, a fishing rod is arranged in the drill pipe, a fishing device is arranged at the bottom end of the fishing rod, a directional instrument is arranged at the bottom end of the fishing device, a drop prevention ring, a screw pressure cap and a drop prevention pin are sequentially arranged at the top end of the fishing rod from bottom to top, a plurality of round holes are arranged around the drop prevention ring, the fishing rod passes through the middle hole of the drop prevention ring, the screw pressure cap is arranged on the fishing rod, and the drop prevention pin is arranged on the fishing rod and located on the screw pressure cap.

[0005] The spring is arranged on the fishing rod, one end of the spring is connected with the drop prevention ring, and the other end of the spring is connected with the fishing device.

[0006] Preferably, a centralizer is sleeved on the fishing rod, and the centralizer is connected with the spring and the fisher respectively.

[0007] Preferably, the fishing rod is provided with a weighted end.

[0008] Preferably, the centralizer has a diameter smaller than an inner diameter of the drill pipe.

[0009] Preferably, the drill pipe is provided with a guide hole at a bottom end, and the guide hole is in a trumpet shape and has a diameter smaller than a borehole diameter.

[0010] Preferably, the drill pipe is externally provided with an outer tube.

[0011] Preferably, the spring has a natural length of 3-5 m.

[0012] Compared with the prior art, the present application has the following beneficial effects:

[0013] The present application can solve the problem that the non-magnetic short section and the non-magnetic drill pipe are left exposed in the well bottom (not in the drill pipe and directly contact with the hole wall) in directional well construction, the instrument is left exposed in the well bottom, the fishing difficulty is relatively large, and the directional instrument is extremely likely to be damaged due to improper fishing method. In this way, the drilling pipe and the fishing rod are often used to fish the instrument, the instrument is sleeved into the drill pipe first, and then the fishing rod is lowered to fish (second time of lowering the drill pipe). The combined fishing tool can be directly combined with the on-site drill pipe for use after being processed, and the fishing rod is not needed to be rented or purchased to be combined with the drill pipe. The combined tool is simple in manufacturing process, can be processed on site, and is easy to operate, and has been verified in construction practice. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a whole structure diagram of the present application. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] In the description of the utility model, it needs to explain that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0017] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0018] The following will be described in detail in combination with the drawings Figure 1 The utility model is further described in detail as follows:

[0019] Referring to Figure 1 The utility model provides a kind of directional instrument fishing tool, including drill pipe 5, fishing rod is equipped in drill pipe 5, fishing rod bottom end is equipped with fisher 9, fisher 9 bottom end is equipped with directional instrument 12, fishing rod top end is sequentially equipped with anti-drop ring 4, screw pressure cap 3 and anti-drop pin 2 from bottom to top, fishing rod top end is located upper drill pipe 1, anti-drop ring 4 is equipped with multiple round holes around, fishing rod passes through the middle hole of anti-drop ring 4 and screw pressure cap 3 is set on fishing rod, anti-drop pin 2 is set on fishing rod and located on screw pressure cap 3;

[0020] In the embodiment, spring 6 is set on fishing rod, one end of spring 6 is connected with anti-drop ring 4, and the other end is connected with fisher 9.

[0021] Further, centralizer 7 is set on fishing rod, and centralizer 7 is connected with spring 6 and fisher 9 respectively. Weighted end 8 is arranged on the fishing rod. The diameter of the centralizer 7 is smaller than the inner diameter of the drill pipe 5. A guide opening 11 is formed at the bottom end of the drill pipe 5. The guide opening 11 is in the shape of a horn, and the diameter of the guide opening is smaller than the diameter of the drill hole. The natural length of the spring 6 is 3-5 m. The fish head 10 of the directional instrument 12 is connected with the fisher 9.

[0022] In the embodiment, the fishing tool is described in detail from bottom to top, first, a guide is processed in combination with the drilling diameter and the drill pipe 5, the large end is smaller than the drilling diameter, the small end is the same as the diameter of the Φ89mm drill pipe 5, and the guide is welded with the drill pipe 5. Then, the fishing rod inside the drill pipe 5 is processed, the bottom of the fishing rod is a fisherman 9 connected with the upper thread, the upper part is provided with a weighted end 8 and a centralizer 7, the centralizer 7 is smaller in diameter than the inner diameter of the drill pipe 5, the upper part is a free section 13 of the fishing rod, and a spring 6 is arranged (the spring 6 is not required for small inclined wells and straight wells, and direct fishing can be performed), the length of the free section is generally about 3-5 meters (which can be determined according to the drilling depth, the deeper the drilling, the longer the length, the deeper the drilling, the greater the error of the drilling tool, the free section serves as a safe activity distance of the directional instrument 12 to avoid damage to the directional instrument 12), the upper part of the fishing rod is composed of a drop prevention ring 4, a thread pressure cap 3 and a anti-drop pin 2. The drop prevention ring 4 is installed and fixed on the thread of the drill pipe 5, the fishing rod passes through the middle hole of the drop prevention ring 4, and the small holes around the drop prevention ring 4 can circulate drilling fluid. The drop prevention ring 4 is tightly arranged on the upper end thread of the fishing rod by the thread pressure cap 3, so as to prevent the fishing rod from falling off, and the anti-drop pin 2 is arranged at the rear, so as to prevent the thread from being reversed. When the directional instrument 12 is fished in the horizontal section, the combined fishing tool needs to be provided with an outer pipe 14, the diameter of the outer pipe 14 is the same as that of the guide, and the upper end is provided with a chamfer to prevent scratching during drilling. The outer pipe 14 can make the fishing tool parallel to the central axis of the drilling track, so as to avoid the outer guide of the guide from being tilted and misaligned with the instrument.

[0023] Embodiment

[0024] In a water prevention and control ground drilling project of a gold mine in Shandong, when the main hole is drilled to a depth of 1237 meters, the pump pressure suddenly rises, and after lifting the drilling tool by 1 meter, the pump pressure drops to 3 MPa. The suspended weight table of the drilling tool has no large change, and it is judged that there is a break between the lower non-magnetic drill collar and the screw. The current main hole is estimated to have a hole inclination angle of 64.88 degrees, an azimuth angle of 199.87 degrees, and a dogleg of 3.19 degrees / 30 meters. After the abnormality occurs, the driller is notified to start drilling. After the drilling is completed, it is found that the non-magnetic drill collar and the non-magnetic short section are broken, and the directional instrument and the lower screw are left in the well. Then, we process the combined fishing tool according to the drawing, and after the processing is completed, the fishing is carried out, and the directional instrument in the hole is fished out of the well at one time. Then, the parent cone is lowered to fish the non-magnetic short section and the screw in the well.

[0025] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tool for retrieving directional instruments, characterized in that, The device includes a drill pipe, a retrieval rod inside the drill pipe, a retrieval device at the bottom of the retrieval rod, a directional instrument at the bottom of the retrieval device, and an anti-drop ring, a threaded cap, and an anti-detachment pin arranged sequentially from bottom to top at the top of the retrieval rod. The anti-drop ring has multiple round holes around it, the retrieval rod passes through the middle hole of the anti-drop ring, and the threaded cap is fitted onto the retrieval rod. The anti-detachment pin is fitted onto the retrieval rod and located on the threaded cap. The retrieval rod is fitted with a spring, one end of which is connected to the anti-drop ring, and the other end is connected to the retrieval device.

2. The directional instrument retrieval tool as described in claim 1, characterized in that, A stabilizer is fitted onto the retrieval rod, and the stabilizer is connected to both the spring and the retrieval rod.

3. The directional instrument retrieval tool as described in claim 2, characterized in that, The salvage rod is equipped with a weighted end.

4. The directional instrument retrieval tool as described in claim 3, characterized in that, The diameter of the stabilizer is smaller than the inner diameter of the drill pipe.

5. The directional instrument retrieval tool as described in claim 4, characterized in that, The bottom end of the drill rod has a guide opening, which is funnel-shaped and its diameter is smaller than the diameter of the borehole.

6. The directional instrument retrieval tool as described in claim 5, characterized in that, The drill pipe is provided with an outer tube.

7. The directional instrument retrieval tool as described in claim 6, characterized in that, The natural length of the spring is 3-5m.

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