CN215057224U - Oil pipe sleeve grinding and milling integrated tool - Google Patents

Abstract

The utility model relates to an in pit operation instrument for oil field development especially has related to an oil pipe cover and has ground and mill integrative instrument. The tool comprises a milling shoe and a milling head, wherein the lower end of the milling shoe is provided with the milling head for milling the upper end of the oil pipe, and the milling shoe is also provided with a water hole for flushing the casing scraps; the sleeve milling head is fixedly assembled at the lower end of the grinding shoe, the bottom of the sleeve milling head is used for sleeve milling an annular space between an oil pipe and an underground casing pipe, and the inner diameter of the sleeve milling head is larger than the outer diameter of the oil pipe. Because the lower end of the grinding shoe is fixedly provided with the sleeve milling head which can be used for sleeve milling the annular space between the oil pipe and the underground casing, in the rotary milling process of the construction pipe column, the bottom of the sleeve milling head firstly can sleeve mill impurities such as stratum sand between the oil pipe and the inner wall of the casing, in the rotary sleeve milling process of downward pressurization of the construction pipe column, the fish top of the oil pipe is introduced into the sleeve milling head to centralize the oil pipe, so that uniform and fine fragments are easily formed, and the problem of uneven milling of the oil pipe in a shaft is solved.

Description

Oil pipe sleeve grinding and milling integrated tool

Technical Field

The utility model relates to an in pit operation instrument for oil field development especially has related to an oil pipe cover and has ground and mill integrative instrument.

Background

The glass fiber reinforced plastic oil pipe has the advantage of corrosion resistance, is used as a tail pipe matched with an engine pumping well, and is widely applied to oil field development. When the glass fiber reinforced plastic tail pipe falls into a shaft during pump detection and is buried by sand returned from the stratum, the glass fiber reinforced plastic oil pipe cannot be treated in a salvage mode due to weak internal and external pressure resistance. The conventional method is to adopt milling tools such as a roller bit, a pointed bit, a flat-bottom milling shoe and the like to mill, and the roller bit does not have good cutting effect on the glass fiber reinforced plastic oil pipe; the sharp drill bit is inserted into the glass fiber reinforced plastic oil pipe for milling, mainly tears the glass fiber reinforced plastic oil pipe, can not completely break glass fiber, and is easy to clamp a drill. The utility model discloses a structure bulletin number of flat junk mill is CN202417372U shows, and the upper portion of this junk mill is equipped with the screw thread to be used for being connected with the tubular column that descends the well, and the middle part is equipped with main water hole, and the bottom surface is equipped with the chip groove according to circumference evenly distributed, and the chip groove communicates with each other with main water hole, in order to satisfy the needs of circulation and chip removal under the high-speed milling operating mode, has set up the tooth between two adjacent chip grooves, in order to be used for improving the milling efficiency to oil pipe.

The flat-bottom milling machine can be used for milling the glass fiber reinforced plastic oil pipe, but the flat-bottom milling machine cannot centralize the glass fiber reinforced plastic oil pipe, so that the problem of uneven cutting during milling exists, and the problem also exists when the flat-bottom milling machine is used for conventional steel oil pipes.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil pipe cover grinds mills integrative instrument to solve the inhomogeneous problem of milling to the oil pipe in the pit shaft.

In order to realize the above purpose, the utility model discloses an integrative instrument of oil pipe cover milling adopts following technical scheme: integrative instrument of oil pipe cover milling includes:

the lower end of the milling shoe is provided with a milling head for milling the upper end of the oil pipe, and the milling shoe is provided with a water hole which is communicated up and down and is used for washing fish falling debris;

the annular milling device is characterized by further comprising a sleeve milling head, wherein the sleeve milling head is fixedly assembled at the lower end of the grinding shoe, the bottom of the sleeve milling head is used for sleeve milling an annular space between the oil pipe and the underground casing pipe, the inner diameter of the sleeve milling head is larger than the outer diameter of the oil pipe, and a circulating channel for communicating the water hole with the annular space is arranged on the sleeve milling head.

Has the advantages that: the utility model discloses an among the technical scheme of oil pipe cover milling integrative instrument, because the fixed cover milling head that can be used for the cover to mill the annular space between oil pipe and the sleeve pipe in the pit that has assembled of low side of junk mill, at the rotatory milling in-process of construction tubular column, cover milling head bottom can at first mill the cover to debris such as stratum sand between oil pipe and the cover inside pipe wall, the rotatory cover milling in-process of construction tubular column pressurization downwards, in oil pipe's fish head was introduced to the cover milling head, play the effect of rightting to oil pipe to alright carry out milling to oil pipe through the junk mill, the oil pipe piece that the milling produced then passes through water eye spun water is washed away, easily forms even, tiny piece, solves the inhomogeneous problem of junk mill to the oil pipe in the pit shaft.

Furthermore, the outer wall of the mill shoe is provided with a centering block which is used for matching with the underground casing so as to promote the centering of the milling head in the underground casing. The centralizing block can be matched with the inner wall of the underground casing pipe, so that the central position of the milling head in the underground casing pipe is ensured, and the accurate centralizing of the oil pipe is realized.

Furthermore, the upper end and the lower end of the centralizing block are respectively provided with a guide surface. The guide face of the upper and lower ends of the righting block can be avoided the utility model discloses an instrument is in the in-process that reciprocates and takes place the jamming.

Furthermore, the inner wall surface of the milling head is set as a milling surface for milling the oil pipe. The milling surface can be matched with a milling head of a milling shoe to form surrounding type milling of the oil pipe, and the uniformity of the milling is further promoted.

Furthermore, the water holes comprise a central water hole arranged in the center of the grinding shoe and peripheral water holes arranged around the central water hole, and the peripheral water holes are obliquely arranged outwards. The central water hole and the peripheral water holes which are obliquely arranged can play a better role in flushing.

Furthermore, the bottom surface of the milling shoe is provided with a chip groove communicated with the central water hole and the peripheral water holes. The chip groove is used for timely removing casing pipe chips generated at the milling head of the milling shoe, so that the milling efficiency is prevented from being influenced.

Furthermore, a pressure test piston cavity and a matched pressure test piston are arranged at the upper part of the milling shoe. The pressure test piston is arranged to facilitate pressure test of the construction pipe column after sleeve milling construction.

Furthermore, a collecting cavity for collecting the pressure testing piston is further arranged below the pressure testing piston in the milling shoe, and the inner diameter of the collecting cavity is larger than that of the pressure testing piston cavity. The inner diameter of the collection cavity is larger than that of the pressure test piston cavity, so that a special tool can be conveniently used for taking the pressure test piston.

Furthermore, the grinding shoe and the milling head are welded and fixed after being mutually inserted at the joint. The grinding shoe and the milling head are mutually inserted and welded at the joint to be matched, so that the strength of the joint of the grinding shoe and the milling head can be fully ensured.

Furthermore, a water through hole is formed in the wall of the milling head, and the circulating channel is formed by the water through hole. The limbers can prevent the pressure build-up phenomenon in the cover milling head, can also play the effect of accelerating the piece in the cavity to flow back.

Drawings

Fig. 1 is a front view (with a section view) of the oil pipe sleeve milling and grinding integrated tool of the present invention;

fig. 2 is a bottom view of a front view of the oil pipe sleeve milling and grinding integrated tool of the present invention;

FIG. 3 is a schematic view of a pressure test piston extraction tool;

fig. 4 is an exploded view of a pressure test piston extraction tool.

In the figure: 1. grinding the shoe; 11. a joint structure; 12. an internal thread; 13. a righting block; 14. a pin mounting hole; 15. welding a groove; 16. a pressure testing piston cavity; 17. a collection chamber; 18. a central water hole; 19. a peripheral water hole; 110. grinding the milling head; 111. a chip groove; 2. sleeving a milling head; 21. a protruding section; 22. a water through hole; 23. milling the inner wall of the head; 24. milling the bottom of the head; 3. a pressure testing piston; 31. a seal ring groove; 32. a card slot; 33. a through hole; 34. a pressure test sealing surface; 35. an overflow channel; 4. a limit pin; 5. a seal ring; 6. externally connecting a welding opening; 7. welding openings are inscribed; 8. sleeving, grinding and milling an integrated cavity; 9. taking out the tool from the pressure test piston; 91. a handle; 92. a rod portion; 93. an eccentric block; 94. and (7) a pin shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as the terms first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The present invention will be described in further detail with reference to examples.

The utility model discloses the embodiment of well oil pipe box integrative instrument of milling is as follows:

as shown in fig. 1-2, the tool has as its main components a shoe 1 and a milling head 2.

The outer contour of the milling shoe 1 is in a stepped shaft shape with a large upper part and a small lower part, wherein a section with a large outer diameter is defined as a large diameter section, and a section with a small outer diameter is defined as a small diameter section, the upper end of the milling shoe 1 is provided with a joint structure 11 for connecting with a running string so as to run into a working position along with the running string, and in the embodiment, the joint structure 11 is specifically an internal thread 12. In other embodiments, the joint structure 11 may further adopt a connection structure such as an external thread according to actual conditions, and only needs to be capable of connecting with a downhole tubular column.

In the large diameter section of the milling shoe 1, a section of the inner hole of the milling shoe 1 forms a pressure test piston cavity 16 at the lower part of the joint structure 11, and the section of the inner hole forming the pressure test piston cavity 16 forms a thin neck structure in the milling shoe 1, namely, the section has the smallest size in the extending direction of the inner hole of the milling shoe 1. The pressure testing piston 3 is installed in the pressure testing piston cavity 16 in a matched mode, the pressure testing piston 3 is installed in the milling shoe 1 through the limiting pin 4, the pin installation hole 14 corresponding to the limiting pin 4 is formed in the wall of the milling shoe 1, the clamping groove 32 matched with the limiting pin is formed in the outer wall of the pressure testing piston 3, the limiting pin 4 is installed in the pin installation hole 14 through threads, the inner end is inserted into the clamping groove 32 in the outer wall of the pressure testing piston 3, and therefore the limitation to the pressure testing piston 3 is achieved. A sealing ring groove 31 is formed in the outer wall of the pressure test piston 3 above the limiting pin 4, a sealing ring 5 is arranged in the sealing ring groove 31, and the sealing fit between the pressure test piston 3 and the milling shoe 1 is realized through the sealing ring 5; the pressure test piston 3 is of a cylindrical structure, the cross section of the lower portion of an inner hole of the pressure test piston is larger than that of the upper portion of the inner hole of the pressure test piston, the upper portion of the pressure test piston is provided with the overflowing channel 35, and the upper port of the overflowing channel 35 is arranged in a funnel shape (inverted cone shape) so as to form a pressure test sealing surface 34. The lower end of the pressure test piston 3 is provided with a through hole 33 on the wall, and the through hole 33 is used for increasing the flow area and facilitating the rapid passing of the liquid required in the working process.

The part that is located the pressure testing piston below of the hole of the major diameter section of milling shoe 1 has constituted and has collected chamber 17, and the internal diameter of collecting chamber 17 is greater than the diameter of pressure testing piston 3 to can conveniently adopt specialized tool to take out pressure testing piston 3, specific saying, because the internal diameter of collecting chamber 17 is greater than the diameter of pressure testing piston 3, at the in-process of upwards taking out pressure testing piston 3 through specialized tool 9, the inner wall of collecting chamber 17 can not take place to interfere and jamming pressure testing piston 3 between 3 with the pressure testing piston. The structure of the special tool 9 is shown in fig. 3 and 4, and comprises a handle part 91, a rod part 92 and an eccentric block 93, wherein the handle part 91 and the rod part 92 form a T shape, an opening is arranged on the rod part 92, the eccentric block 93 is installed in the opening of the rod part 92 through a pin 94, in an initial state, the eccentric block 93 is limited by an inner hole of a pipe column and is hidden in the rod part 92, when the lower part of the inner hole of the pressure testing piston 3 is reached, the limit of the eccentric block 93 is contacted, the eccentric block swings around the pin 94 under the action of gravity, the rod part 92 is swung out, the eccentric block is matched with a step surface on the inner hole of the pressure testing piston 3, and the pressure testing piston 3 is taken out.

The hole of the minor diameter section of mill shoe 1 is less than the hole of major diameter section, and the hole of minor diameter section has formed a central eye 18, and simultaneously, in this embodiment, on the inner wall of the minor diameter section of mill shoe 1, peripheral eye 19 has still been set up around central eye 18, and peripheral eye 19 leans out the setting, and its diameter is less than central eye 18, and the effect of eye (central eye, peripheral eye) is that the confession liquid passes through to form the efflux, washes the sleeve pipe piece of below. In other embodiments, the number and position of the water holes and the spraying direction can be set arbitrarily on the premise of meeting the function of flushing the sleeve scraps.

The lower end of the milling shoe 1 is provided with a milling head 110, that is, a milling structure is provided on the lower end surface of the milling shoe 1, and in this embodiment, the milling structure is specifically formed by a welded tungsten steel milling block, but in other embodiments, the milling structure may also be a welded composite sheet, or formed by directly cutting corresponding teeth on the milling shoe. In order to facilitate the removal of the chips, the lower end surface of the milling shoe 1 is provided with a chip removal groove 111, and in the embodiment, the central water hole 18 and the peripheral water holes 19 are both positioned in the chip removal groove 111 and are communicated with the chip removal groove.

The shape of the milling head 2 is cylindrical, a small-diameter section at the lower end of the milling shoe 1 is inserted into the upper end of the milling head 2, in order to prevent the milling head 2 from rotating relative to the milling shoe 1, a welding groove 15 is arranged at the lower end of the milling shoe 1, the welding groove 15 forms a gap on the wall of the milling shoe 1, the thickness of the gap is equal to the wall thickness of the milling head 2, a protruding section 21 (parapet wall structure) corresponding to the welding groove 15 is arranged at the upper end of the milling head 2, the protruding section 21 is clamped in the corresponding welding groove 15, and welding seams are arranged along the bottom and the wall of the welding groove 15 to form an external welding port 6; meanwhile, the lower end of the milling shoe 1 is welded with the milling head 2 to form an inner welding interface 7.

The outer diameter of the milling head 2 is smaller than the inner diameter of a downhole casing and larger than the outer diameter of a well-dropping oil pipe, and is used for milling plugs such as sand grains buried in the air of the oil sleeve ring, so that a tungsten steel block is arranged on the lower end face of the milling head 2, namely the bottom 24 of the milling head. In addition, in order to assist the milling head 110 in milling the oil pipe entering the milling head 2, a tungsten steel block is also laid on the inner wall 23 of the milling head, so that the inner cavity of the milling head forms a milling and milling integrated cavity 8.

In order to avoid the pressure build-up in the sleeve milling integrated cavity 8 in the sleeve milling process, the lower pipe wall of the sleeve milling head 2 is provided with radial water through holes 22, so that the back discharge of internal fragments can be accelerated. In order to avoid reducing the strength of the milling head 2, the number of the water through holes 22 of the milling head 2 is not too large, so that the smooth chip carrying is better.

In order to ensure that the milling head 2 and the oil pipe are centered in the milling process, the abrasion of the milling head 2 to the casing wall is reduced, the outer wall of the grinding shoe 1 is provided with four centering blocks 13, the four centering blocks 13 are uniformly distributed on the grinding shoe 1 around the axis of the milling shoe 1, the upper end of each centering block is consistent with the upper end face of the pressure test piston 3, the lower end of each centering block is consistent with the bottom of the grinding shoe 1, and in addition, the upper end face and the lower end face of each centering block 13 are respectively set as guide faces. Of course, in other embodiments, the shape, number, and distribution of the centering blocks 13 may be set according to actual conditions, and only the function of centering the milling shoe needs to be satisfied, which is not described herein.

Use the case to mill glass steel oil pipe as an example, use the utility model discloses an oil pipe cover grinds the cover milling process of milling integrative instrument as follows: the utility model discloses connect at the construction tubular column bottom, at the rotatory cover milling in-process of construction tubular column, the tungsten steel piece that cover milling head bottom 24 was laid is milled the cover to debris such as stratum sand between glass steel oil pipe and the cover intraductal wall, the construction tubular column rotatory cover milling in-process of pressurizeing downwards, glass steel oil pipe's fish head is introduced into in the cover milling head 2, carry out the parcel formula milling of large tracts of land simultaneously to the top and the side on glass steel oil pipe fish head by the tungsten steel piece of cover milling head inner wall 23 and the tungsten steel piece of 1 bottom of junk milling, easily form evenly, tiny piece, simultaneously through from the construction tubular column, the water eye of junk 1, the common bits passageway of taking of constituteing of limbers 22 of cover milling head 2 carries out the well-flushing of positive circulation, return the piece to ground, accomplish the cover milling construction to glass steel oil pipe. Of course, in the case of no water through hole, the bottom of the milling head acting on the position of impurities such as formation sand can form a corresponding circulation channel, for example, the circulation channel is designed to be a structure with a notch, so that the smoothness of a positive circulation well washing path is realized. Through the above description, the skilled person in the art should know that the utility model discloses an oil pipe cover mills integrative instrument and handles the sleeve pipe of materials such as other steels, can play the same effect equally, reaches corresponding effect.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. Integrative instrument of oil pipe cover milling includes:

the lower end of the milling shoe (1) is provided with a milling head (110) for milling the upper end of the oil pipe, and the milling shoe (1) is provided with a water hole which is communicated up and down and is used for washing fish falling debris; it is characterized in that the preparation method is characterized in that,

still include cover milling head (2), cover milling head (2) fixed assembly is in the lower extreme of junk mill (1), cover milling head bottom (24) are used for the cover to mill the annular space between oil pipe and the sleeve pipe in the pit, and the internal diameter of cover milling head (2) is greater than the external diameter of oil pipe, has set up the intercommunication on cover milling head (2) the circulation channel of water hole and annular space.

2. The oil pipe casing milling integrated tool according to claim 1, characterized in that the outer wall of the milling shoe (1) is provided with a centralizing block (13) for cooperating with a downhole casing to promote centering of the casing milling head (2) in the downhole casing.

3. The oil pipe sleeve milling and grinding integrated tool as claimed in claim 2, wherein the upper end and the lower end of the centering block (13) are respectively provided with a guide surface.

4. The oil pipe sleeve milling and grinding integrated tool as claimed in claim 1, wherein the inner wall surface of the sleeve milling head (2) is provided with a milling surface for milling and grinding the oil pipe.

5. Oil pipe casing milling integrated tool according to any one of claims 1-4, characterized in that the water holes comprise a central water hole (18) arranged in the center of the milling shoe (1) and peripheral water holes (19) arranged around the central water hole (18), and the peripheral water holes (19) are arranged in an outward inclined manner.

6. The oil pipe sleeve milling and grinding integrated tool as claimed in claim 5, wherein the bottom surface of the milling shoe (1) is provided with a chip groove communicated with the central water hole (18) and the peripheral water holes (19).

7. The oil pipe sleeve milling integrated tool according to any one of claims 1 to 4, characterized in that the upper part of the milling shoe (1) is provided with a pressure test piston cavity (16) and a matched pressure test piston (3).

8. The oil pipe sleeve grinding and milling integrated tool according to claim 7, characterized in that a collecting cavity (17) for collecting the pressure test piston (3) is further arranged in the grinding shoe (1) below the pressure test piston (3), and the inner diameter of the collecting cavity (17) is larger than that of the pressure test piston cavity (16).

9. The oil pipe casing milling integrated tool according to any one of claims 1-4, characterized in that the milling shoe (1) and the casing milling head (2) are welded after being inserted into each other at the joint.

10. The oil pipe casing milling integrated tool according to any one of claims 1 to 4, characterized in that a water through hole (22) is formed in the wall of the casing milling head (2), and the circulating channel is formed by the water through hole (22).

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