Conical surface lead mold for oil field

Abstract

The conical surface lead mold for the oil field comprises a short circuit, a coupling is fixedly installed at one end of the short circuit, a lead body is fixedly installed at the end, away from the coupling, of the short circuit, meanwhile, a detection end installation assembly is fixedly arranged at the end of the lead body, and the detection end installation assembly comprises a butt joint end face arranged at the bottom of the lead body. The butt joint end face is covered with an end body, meanwhile, a positioning base is fixedly installed on the surface of the end body, and a positioning groove is formed in the bottom of the lead body. According to the conical surface lead mold for the oil field, the lead body at the bottom of the lead mold and the end body are integrally designed to be conical, the lower portion is narrow, the upper portion is wide, the contact area between the lead mold and the well wall in the descending process is relatively small, and therefore the friction resistance and the abrasion degree in the moving process of the lead mold are reduced; the lead mold is more suitable for long-distance underground detection, the service life of the lead mold can be prolonged, and the operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield detection tool field, concretely is a kind of oilfield with conical lead mould. BACKGROUND

[0002] Oilfield lead mould is a kind of tool for oilfield detection, mainly used for detecting downhole fish top state and casing condition. Its working principle is to rely on the hardness of lead, plasticity good feature, under the action of drilling pressure and contact with fish or deformed casing to produce plastic deformation, thereby indirectly reflecting fish top state or casing condition. When using conical lead mould, it needs to be connected to drilling tool, and then lowered into well. When conical lead mould contacts fish or deformed casing, it will be subjected to plastic deformation by the action of drilling pressure. By analyzing the deformation of conical lead mould, the shape, size and position of fish, and the deformation of casing can be judged.

[0003] The bottom of lead mould is provided with cylindrical lead body, so that the contact area of lead mould with well wall is relatively large when moving in well, thereby increasing the friction resistance and wear degree of lead mould, especially in long-distance downhole detection process, directly reducing the service life of lead mould and increasing operation cost. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a kind of oilfield with conical lead mould to solve the defect that the contact area of lead mould with well wall is relatively large when moving in well in the above background art.

[0005] To achieve the above object, a kind of oilfield with conical lead mould is provided, including short circuit, the short circuit one end fixed mounting coupling, and the short circuit end away from the coupling is fixedly installed with lead body, while the end of lead body is fixedly arranged with detection end head installation component, detection end head installation component includes the butt joint end face opened in the bottom of lead body, and the butt joint end face is covered with end head body, while the surface of end head body is fixedly installed with positioning seat, the bottom of lead body is provided with positioning groove.

[0006] Preferably, the lead body and end head body are combined together to be conical, and the lead body and end head body are positioned and installed through positioning seat and positioning groove.

[0007] Preferably, trapezoidal connecting seat is fixedly arranged between the short circuit and lead body, and the section of trapezoidal connecting seat is arranged as isosceles trapezoid, while the short circuit and lead body are connected through trapezoidal connecting seat.

[0008] Preferably, the size of positioning seat and positioning groove is matched, and the length of positioning seat is equal to the depth of positioning groove, while positioning seat is inserted into the inside of positioning groove.

[0009] Preferably, the outer side surface of the positioning seat is uniformly provided with four groups of screw holes, and the bottom outer side of the lead body is uniformly provided with four groups of accommodating holes, and the cross section of the accommodating hole is provided in a "T" shape.

[0010] Preferably, the positioning seat is inserted in the internal screw hole of the positioning groove, and the screw hole and the fixing bolt are in a size matching state, and the fixing bolt is screwed and fixed on the outer side surface of the screw hole through the accommodating hole, and the lead body and the end head body are uniformly screwed and fixed by four groups of equidistantly arranged fixing bolts, and the stress end of the fixing bolt is smaller than the depth of the accommodating hole.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] 1. The lead body and the end head body at the bottom of the lead mold are designed as a tapered structure, which is narrow at the bottom and wide at the top, so that the contact area of the lead mold with the well wall is relatively small during downward movement, thereby reducing the friction resistance and wear degree during movement of the lead mold; the lead mold is more suitable for long-distance underground detection, can prolong the service life of the lead mold, and reduce the operation cost.

[0013] 2. In the utility model, when the deformation degree of the bottom surface of the end head body is small and the deformation does not affect the accurate detection of the fish or casing state, the end head body can be used twice after evaluation and appropriate treatment; if the deformation degree is serious, the end head body cannot be used twice; because such deformation may cause inaccurate measurement results and cannot truly reflect the underground situation; therefore, the seriously damaged end head body needs to be removed and replaced with a brand new end head body, without discarding the entire lead mold, thereby greatly reducing the use cost of the lead mold. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view of the structure of the utility model;

[0015] Figure 2 It is a bottom view of the structure of the utility model;

[0016] Figure 3 It is a top view of the structure of the utility model;

[0017] Figure 4 It is a schematic view of the detection end head mounting assembly of the structure of the utility model;

[0018] Figure 5 It is a bottom view of the structure of the utility model. Figure 4

[0019] Reference numerals in the drawing: 1, short circuit; 2, coupling; 3, trapezoidal connecting seat; 4, lead body; 5, detection end head mounting assembly; 51, end head body; 52, positioning seat; 53, screw hole; 54, fixing bolt; 55, accommodating hole; 56, butt joint end face; 57, positioning groove.​ DETAILED DESCRIPTION

[0020] Please refer to Figures 1-5 The utility model provides a kind of oil field with taper lead mould, including short circuit 1, short circuit 1 one end fixed installation coupling 2, and short circuit 1 away from the one end fixed installation of coupling 2 has lead body 4, while lead body 4 end fixedly arranged detection end head installation component 5, detection end head installation component 5 includes the butt joint end face 56 being opened in lead body 4 bottom, and butt joint end face 56 is covered end head body 51, while the surface of end head body 51 is fixedly installed with positioning seat 52, the bottom of lead body 4 is opened positioning groove 57.

[0021] As a kind of preferable embodiment, lead body 4 and end head body 51 are combined together and set as taper, and lead body 4 and end head body 51 are positioned and installed by positioning seat 52 and positioning groove 57.

[0022] As a kind of preferable embodiment, trapezoidal connecting seat 3 is fixedly arranged between short circuit 1 and lead body 4, and the section of trapezoidal connecting seat 3 is set as isosceles trapezoid, while short circuit 1 and lead body 4 are connected by trapezoidal connecting seat 3.

[0023] From the above, in use, lead body 4 and end head body 51 of lead mould bottom are set as taper as a whole, narrow in the lower, wide in the upper, and the contact area of lead mould is relatively small in the process of descending with well wall, so as to reduce the friction resistance and wear degree in the process of lead mould movement;More suitable for long distance downhole detection, can prolong the service life of lead mould, reduce operating cost.

[0024] As a kind of preferable embodiment, the size of positioning seat 52 and positioning groove 57 is compatible, and the length of positioning seat 52 is equal to the depth of positioning groove 57, while positioning seat 52 is inserted in the inside of positioning groove 57.

[0025] As can be seen from the above, in use, before using the device, the operator first holds the end head body 51, inserts the positioning seat 52 at the end of the end head body 51 into the positioning groove 57 formed at the bottom of the lead body 4, and then uses the fixing bolt 54 to be screwed and fixed to the outside surface of the screw hole 53 by penetrating the containing hole 55. The lead body 4 and the end head body 51 are uniformly screwed and fixed by the four groups of equidistantly arranged fixing bolts 54, so as to ensure the stability of the butt joint and fixation between the end head body 51 and the lead body 4, and the outside surfaces of the end head body 51 and the lead body 4 are smoothly transitioned without protrusions. At this time, the lead mold is connected to the drilling tool and then is lowered into the well. When the lead end head body 51 at the bottom of the lead mold contacts the fish or the deformed casing, plastic deformation will be generated under the action of the drilling pressure. By analyzing the deformation of the conical lead mold, the shape, size and position of the fish, and the deformation of the casing and other information can be determined. When the deformation degree of the bottom surface of the end head body 51 is small and the deformation does not affect the accurate detection of the fish or the casing state, after evaluation and appropriate treatment, the end head body 51 can be used twice. If the deformation degree is serious, for example, large-area damage, tearing or serious twisting occurs, the end head body 51 cannot be used twice. Because such deformation may cause inaccurate measurement results and cannot truly reflect the downhole conditions, the severely damaged end head body 51 needs to be removed and replaced with a brand new end head body 51, without discarding the entire lead mold, so that the use cost of the lead mold is greatly reduced.

[0026] As a preferred embodiment, four groups of screw holes 53 are uniformly formed on the outside surface of the positioning seat 52, and four groups of containing holes 55 are uniformly formed on the bottom outside of the lead body 4, and the cross section of the containing hole 55 is arranged in a "T" shape.

[0027] As a preferred embodiment, the positioning seat 52 is inserted into the positioning groove 57, the screw hole 53 and the containing hole 55 are in communication, the size of the screw hole 53 is matched with that of the fixing bolt 54, the fixing bolt 54 is screwed and fixed to the outside surface of the screw hole 53 by penetrating the containing hole 55, the lead body 4 and the end head body 51 are uniformly screwed and fixed by the four groups of equidistantly arranged fixing bolts 54, and the stress end of the fixing bolt 54 is smaller than the depth of the containing hole 55.

[0028] Working principle: before using the device, the operator first holds the end body 51, inserts the positioning seat 52 at the end of the end body 51 into the positioning groove 57 opened at the bottom of the lead body 4, then uses the fixing bolt 54 to be screwed and fixed outside the surface of the screw hole 53 through the containing hole 55, the lead body 4 and the end body 51 are uniformly screwed and fixed by four groups of equidistantly arranged fixing bolts 54, the stability of the butt joint and fixation between the end body 51 and the lead body 4 is ensured, the outer surface of the end body 51 and the lead body 4 is smoothly transitioned, and there is no protrusion; at this time, the lead mold is connected to the drilling tool, and then lowered into the well; when the lead end body 51 at the bottom of the lead mold contacts the fish or the deformed casing, plastic deformation will be generated under the action of the drilling pressure; by analyzing the deformation of the conical lead mold, the shape, size and position of the fish, and the deformation of the casing can be judged; when the deformation degree of the bottom surface of the end body 51 is small, and the deformation does not affect the accurate detection of the fish or the casing state, after evaluation and appropriate treatment, it can be used twice; if the deformation degree is serious, for example, large area damage, tearing or serious distortion, it cannot be used twice; because such deformation may cause inaccurate measurement results, and cannot truly reflect the downhole condition; therefore, the seriously damaged end body 51 needs to be removed, and a brand new end body 51 is replaced, without discarding the whole lead mold, greatly reducing the use cost of the lead mold; the lead body 4 and the end body 51 at the bottom of the lead mold are conical as a whole, narrow at the bottom and wide at the top, the contact area of the lead mold with the well wall is relatively small during downward movement, thereby reducing the friction resistance and wear degree during movement of the lead mold; it is more suitable for long distance downhole detection, can prolong the service life of the lead mold, and reduce the operation cost.

[0029] The embodiments of the utility model are given for example and description, although the embodiments of the utility model have been shown and described above, it is understood that the above-mentioned embodiments are exemplary, and cannot be understood as the limitation of the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A conical lead mold for oilfield use, comprising a short connector (1), characterized in that: One end of the short connector (1) is fixedly installed with a coupling (2), and the end of the short connector (1) away from the coupling (2) is fixedly installed with a lead body (4). At the same time, a detection end mounting assembly (5) is fixedly installed at the end of the lead body (4). The detection end mounting assembly (5) includes a mating end face (56) opened at the bottom of the lead body (4), and the mating end face (56) is covered with an end body (51). At the same time, a positioning seat (52) is fixedly installed on the surface of the end body (51), and a positioning groove (57) is opened at the bottom of the lead body (4).

2. The conical lead mold for oilfields according to claim 1, characterized in that: The lead body (4) and the end body (51) are combined into a conical shape, and the lead body (4) and the end body (51) are positioned and installed by a positioning seat (52) and a positioning groove (57).

3. The conical lead mold for oilfields according to claim 1, characterized in that: A trapezoidal connecting seat (3) is fixedly provided between the shorting (1) and the lead body (4), and the cross section of the trapezoidal connecting seat (3) is an isosceles trapezoid. At the same time, the shorting (1) and the lead body (4) are connected by the trapezoidal connecting seat (3).

4. The conical lead mold for oilfields according to claim 1, characterized in that: The dimensions of the positioning seat (52) and the positioning groove (57) are matched, and the length of the positioning seat (52) is equal to the depth of the positioning groove (57), while the positioning seat (52) is inserted into the inside of the positioning groove (57).

5. The conical lead mold for oilfields according to claim 4, characterized in that: The outer surface of the positioning seat (52) is evenly provided with four sets of screw holes (53), and the bottom outer side of the lead body (4) is evenly provided with four sets of receiving holes (55), and the cross section of the receiving holes (55) is set in a "T" shape.

6. The conical lead mold for oilfields according to claim 5, characterized in that: The positioning seat (52) is inserted into the internal screw hole (53) of the positioning groove (57) and the receiving hole (55) are in a connected state. The screw hole (53) is matched with the size of the fixing bolt (54). At the same time, the fixing bolt (54) passes through the receiving hole (55) and is screwed and fixed on the outer surface of the screw hole (53). The lead body (4) and the end body (51) are evenly screwed and fixed by four sets of equidistant fixing bolts (54). At the same time, the force-bearing end of the fixing bolt (54) is less than the depth of the receiving hole (55).

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