Casing centralizer for oil exploitation downhole operation

Abstract

The utility model relates to the technical field of oil exploitation downhole operation appliances, in particular to a casing centralizer for oil exploitation downhole operation, which comprises a first adjusting frame, a first telescopic strip, a first positioning piece, a first half fixing ring, a second adjusting frame, a second telescopic strip, a second positioning piece, a second half fixing ring and a plurality of centralizing mechanisms. The first telescopic strip and the second telescopic strip are pulled according to the size of a borehole, so that the positions of the first half fixing ring and the second half fixing ring are adjusted, and the first positioning piece and the second positioning piece are operated to be locked with corresponding positioning holes in the first telescopic strip and the second telescopic strip, so that the device can adapt to the boreholes of different sizes; therefore, the problems that according to an existing casing centralizer for oil exploitation downhole operation, due to the fact that the size of a lantern ring is fixed due to the fact that the lantern ring is of an integrated structure, the size of the lantern ring cannot be adjusted when well holes of different sizes are met, and the universality is low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of downhole oil production tools, in particular to a casing centralizer for downhole oil production. Background Art

[0002] A centralizer is a drilling auxiliary tool. In a drilled wellbore, casing needs to be lowered to prevent the wellbore from collapsing. Due to gravity, the casing deviates toward the lower end of the wellbore, making the cement ring at the lower end of the casing very thin. Casing centralizers are needed. Existing casing centralizers are difficult to ensure the centering of the casing.

[0003] The prior art (CN204371128U) discloses a casing centralizer for downhole operations in oil production, comprising a collar, an operating box, a clip, an adjustment wheel, a guide wheel, a button, a lever mechanism, and a spring. The characteristic of the invention is that the operating box is fitted around the collar, and the operating box is specifically composed of two layers, the upper layer being a gear box, and the lower layer being a cavity operating chamber. A groove is provided on one side of the clip, and a rack is provided in the groove. A clip has a scale on one side of the groove, a clip has teeth on both sides, and a clip, one end of which passes through the cavity operating chamber of the operating box is provided in the collar, and the rack in the groove on one side is connected with the gear transmission system in the gear box to ensure the centering of the casing.

[0004] However, in the above method, since the size of the collar is fixed due to its integrated structure, the collar size cannot be adjusted when encountering wellbores of different sizes, resulting in low versatility. Utility Model Content

[0005] The purpose of the utility model is to provide a casing centralizer for downhole operations in oil production, aiming to solve the problem of low versatility of existing casing centralizers for downhole operations in oil production, in which the size of the casing ring is fixed due to the integrated structure of the casing ring. Therefore, when encountering wellbores of different sizes, the size of the casing ring cannot be adjusted.

[0006] To achieve the above-mentioned object, the utility model provides a casing centralizer for downhole oil production operations, comprising a first adjustment frame, a first telescopic bar, a first positioning member, a first semi-fixed ring, a second adjustment frame, a second telescopic bar, a second positioning member, a second semi-fixed ring and a plurality of centralizing mechanisms;

[0007] The first telescopic bar is slidably connected to the first adjustment frame and is located on one side of the first adjustment frame; the first positioning member is arranged on one side of the first adjustment frame; the first semi-fixed ring is fixedly connected to the first telescopic bar and is located on one side of the first telescopic bar; the first telescopic bar has a plurality of first positioning holes, and the plurality of first positioning holes are respectively located on one side of the first telescopic bar; the second adjustment frame is fixedly connected to the first semi-fixed ring and is located on one side of the first semi-fixed ring; the second telescopic bar is slidably connected to the second adjustment frame and is located on one side of the second adjustment frame; the second telescopic bar has a plurality of second positioning holes, and the plurality of second positioning holes are respectively located on one side of the second telescopic bar; the second positioning member is arranged on one side of the second adjustment frame; the second semi-fixed ring is fixedly connected to the second telescopic bar and the first adjustment frame, respectively, and is located between the second telescopic bar and the first adjustment frame; the plurality of the straightening mechanisms are respectively arranged on one side of the first semi-fixed ring and the second semi-fixed ring.

[0008] In which, the first positioning member includes a first locking screw, a first knob and a first pin, the first locking screw is threadedly connected to the first adjustment frame and is located on one side of the first adjustment frame; the first knob is fixedly connected to the first locking screw and is located on one side of the first locking screw; the first pin is fixedly connected to the first locking screw and is located on one side of the first locking screw.

[0009] In which, the second positioning member includes a second locking screw, a second knob and a second pin, the second locking screw is threadedly connected to the second adjustment frame and is located on one side of the second adjustment frame; the second knob is fixedly connected to the second locking screw and is located on one side of the second locking screw; the second pin is fixedly connected to the second locking screw and is located on one side of the second locking screw.

[0010] Among them, the straightening mechanism includes an operating box, a clamping strip, a guide wheel and an adjustment wheel. The operating box is fixedly connected to the first semi-fixed ring and is located on one side of the first semi-fixed ring; the clamping strip is slidingly connected to the operating box and is located on one side of the operating box; the guide wheel is arranged on one side of the clamping strip; and the adjustment wheel is arranged on one side of the operating box.

[0011] Wherein, the straightening mechanism further includes a connecting block and an arc-shaped abutment block, the connecting block is fixedly connected to the clamping strip and is located on one side of the clamping strip; the arc-shaped abutment block is fixedly connected to the connecting block and is located on one side of the connecting block.

[0012] The utility model discloses a casing straightener for downhole operation in oil production. When straightening the casing, the first telescopic bar and the second telescopic bar are pulled respectively according to the size of the wellbore, and the first and second telescopic bars are expanded or contracted in the first adjustment frame and the second adjustment frame, so that the positions of the first semi-fixed ring and the second semi-fixed ring are adjusted, and the size of the overall structure is increased or decreased. Subsequently, the first positioning member and the second positioning member are operated to lock the corresponding positioning holes on the first telescopic bar and the second telescopic bar to complete the adjustment of the overall structure size so that it can adapt to wellbores of different sizes. Subsequently, the casing is set on the casing, and the straightening structure is operated respectively to straighten and center the casing, thereby solving the problem of the existing casing straightener for downhole operation in oil production. Since the size of the casing is fixed as an integrated structure, the size of the casing cannot be adjusted when encountering wellbores of different sizes, resulting in low versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is an overall front view of the utility model.

[0016] Figure 3 It is a cross-sectional view of the first adjustment frame and the first positioning member of the utility model.

[0017] Figure 4 It is a cross-sectional view of the second adjustment frame and the second positioning member of the present invention.

[0018] 101-first adjusting frame, 102-first telescopic strip, 103-first positioning piece, 104-first half fixed ring, 105-second adjusting frame, 106-second telescopic strip, 107-second positioning piece, 108-second half fixed ring, 109-straightening mechanism, 110-first locking screw, 111-first knob, 112-first latch, 113-second locking screw, 114-second knob, 115-second latch, 116-operating box, 117-card strip, 118-guide wheel, 119-adjusting wheel, 120-connecting block, 121-arc-shaped block, 122-first positioning hole, 123-second positioning hole. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] See also Figures 1-4 ,in, Figure 1 This is a schematic diagram of the overall structure of the utility model. Figure 2 It is the overall front view of the utility model. Figure 3 This is a cross-sectional view of the first adjustment frame and the first positioning member of the utility model. Figure 4 It is a cross-sectional view of the second adjustment frame and the second positioning member of the present invention.

[0021] The utility model is a casing centralizer for oil well drilling, comprising a first adjusting frame 101, a first telescopic bar 102, a first positioning member 103, a first semi-fixed ring 104, a second adjusting frame 105, a second telescopic bar 106, a second positioning member 107, a second semi-fixed ring 108 and a plurality of centralizing mechanisms 109, wherein the first telescopic bar 102 has a plurality of first positioning holes 122, the second telescopic bar 106 has a plurality of second positioning holes 123, the first positioning member 103 includes a first locking screw 110, a first knob 111 and a second locking screw 112. 11 and a first latch 112, the second positioning member 107 includes a second locking screw 113, a second knob 114 and a second latch 115, and the straightening mechanism 109 includes an operating box 116, a clamping bar 117, a guide wheel 118, an adjusting wheel 119, a connecting block 120 and an arc-shaped support block 121. The above-mentioned solution solves the problem of the existing casing centralizer for downhole operations in oil production. Since the size of the collar is fixed in an integrated structure, the collar size cannot be adjusted when encountering wellbores of different sizes, resulting in a problem of low versatility.

[0022] wherein, the first telescopic bar is slidably connected to the first adjustment frame 101 of the first adjustment frame 101 and is located on one side of the first adjustment frame 101; the first positioning member 103 is arranged on one side of the first adjustment frame 101; the first semi-fixed ring 104 is fixedly connected to the first telescopic bar 102 and is located on one side of the first telescopic bar 102; a plurality of first positioning holes 122 are respectively located on one side of the first telescopic bar 102; the second adjustment frame 105 is fixedly connected to the first semi-fixed ring 104 and is located on one side of the first semi-fixed ring 104; the second telescopic bar 106 is slidably connected to the second adjustment frame 105 and is located on one side of the second adjustment frame 105; a plurality of second positioning holes 123 are respectively located on one side of the second telescopic bar 106; the second positioning member 107 is arranged on one side of the second adjustment frame 105; the second semi-fixed ring 108 is respectively fixedly connected to the second telescopic bar 106 and the first adjustment frame 101 and is located between the second telescopic bar 106 and the first adjustment frame 101; a plurality of The straightening mechanism 109 is respectively provided on one side of the first semi-fixed ring 104 and the second semi-fixed ring 108. When straightening the casing, the first telescopic bar 102 and the second telescopic bar 106 are pulled respectively according to the size of the wellbore, and expanded or contracted in the first adjustment frame 101 and the second adjustment frame 105, so that the positions of the first semi-fixed ring 104 and the second semi-fixed ring 108 are adjusted, increasing or decreasing the size of the overall structure. Subsequently, the first positioning member 103 and the second positioning member 107 are operated to lock with the corresponding positioning holes on the first telescopic bar 102 and the second telescopic bar 106, completing the adjustment of the overall structure size so that it can adapt to wellbores of different sizes. Subsequently, it is placed on the casing, and the straightening mechanism is operated respectively to straighten and center the casing, thereby solving the problem of existing casing centralizers for downhole oil production operations. Since the size of the casing ring is fixed due to its integrated structure, the size of the casing ring cannot be adjusted when encountering wellbores of different sizes, resulting in low versatility.

[0023] Secondly, the first locking screw 110 is threadedly connected to the first adjustment frame 101 and is located on one side of the first adjustment frame 101; the first knob 111 is fixedly connected to the first locking screw 110 and is located on one side of the first locking screw 110; the first latch 112 is fixedly connected to the first locking screw 110 and is located on one side of the first locking screw 110. When the first telescopic bar 102 is moved to a suitable position, twisting the first knob 111 causes the first locking screw 110 to rotate and drive the first latch 112 to be inserted into the corresponding first positioning hole 122 on the first telescopic bar 102, thereby completing the fixation of the position of the first telescopic bar 102.

[0024] Again, the second locking screw 113 is threadedly connected to the second adjustment frame 105 and is located on one side of the second adjustment frame 105; the second knob 114 is fixedly connected to the second locking screw 113 and is located on one side of the second locking screw 113; the second latch 115 is fixedly connected to the second locking screw 113 and is located on one side of the second locking screw 113. When the second telescopic bar 106 is moved to a suitable position, twist the second knob 114 to rotate the second locking screw 113 to drive the second latch 115 to be inserted into the corresponding second positioning hole 123 on the second telescopic bar 106, thereby completing the fixation of the position of the second telescopic bar 106.

[0025] In addition, the operating box 116 is fixedly connected to the first semi-fixed ring 104 and is located on one side of the first semi-fixed ring 104; the clamping strip 117 is slidably connected to the operating box 116 and is located on one side of the operating box 116; the guide wheel 118 is arranged on one side of the clamping strip 117; the adjusting wheel 119 is arranged on one side of the operating box 116. When the casing is straightened and centered, the adjusting wheel 119 is operated to drive the gear in the operating box 116 to drive the clamping strip 117 to cooperate with the guide wheel 118 to retract and retract, so that the clamping strip 117 contacts the casing. The working principle and connection method of the operating box 116, the adjusting wheel 119, the clamping strip 117 and the guide wheel 118 are the same as those of the operating box, clamping strip, adjustment wheel and guide wheel in the patent document with publication number CN204371128U. They are prior art and will not be repeated here.

[0026] Furthermore, the connecting block 120 is fixedly connected to the clamping strip 117 and is located on one side of the clamping strip 117; the arc-shaped stop block 121 is fixedly connected to the connecting block 120 and is located on one side of the connecting block 120. The connecting block 120 is used to drive the arc-shaped stop block 121 to move when the clamping strip 117 moves. Through the assembly of the arc-shaped stop block 121, the clamping strip 117 fits better with the outer surface of the sleeve when it contacts the sleeve.

[0027] When using the present invention, the first telescopic strip 102 and the second telescopic strip 106 are pulled respectively according to the size of the wellbore, and expanded or contracted in the first adjustment frame 101 and the second adjustment frame 105, so that the positions of the first semi-fixed ring 104 and the second semi-fixed ring 108 are adjusted, increasing or decreasing the size of the overall structure. Subsequently, the first positioning member 103 and the second positioning member 107 are operated to lock with the corresponding positioning holes on the first telescopic strip 102 and the second telescopic strip 106, completing the adjustment of the overall structure size so that it can adapt to wellbores of different sizes. , and then put it on the casing, operate the adjusting wheel 119 to drive the gear in the operating box 116 to drive the clamping strip 117 to cooperate with the guide wheel 118 to extend and retract, and the connecting block 120 is used to drive the arc-shaped block 121 to move when the clamping strip 117 moves. Through the assembly of the arc-shaped block 121, the clamping strip 117 fits the outer surface of the casing more closely when it contacts the casing, thereby solving the problem of the existing casing centralizer for downhole oil production. Since the size of the ring is fixed in an integrated structure, the size of the ring cannot be adjusted when encountering wellbores of different sizes, resulting in low versatility.

[0028] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. A casing centralizer for downhole oil production operations, comprising a first adjustment frame, characterized in that: It also includes a first telescopic strip, a first positioning member, a first semi-fixed ring, a second adjustment frame, a second telescopic strip, a second positioning member, a second semi-fixed ring and a plurality of straightening mechanisms; The first telescopic bar is slidably connected to the first adjustment frame and is located on one side of the first adjustment frame; the first positioning member is arranged on one side of the first adjustment frame; the first semi-fixed ring is fixedly connected to the first telescopic bar and is located on one side of the first telescopic bar; the first telescopic bar has a plurality of first positioning holes, and the plurality of first positioning holes are respectively located on one side of the first telescopic bar; the second adjustment frame is fixedly connected to the first semi-fixed ring and is located on one side of the first semi-fixed ring; the second telescopic bar is slidably connected to the second adjustment frame and is located on one side of the second adjustment frame; the second telescopic bar has a plurality of second positioning holes, and the plurality of second positioning holes are respectively located on one side of the second telescopic bar; the second positioning member is arranged on one side of the second adjustment frame; the second semi-fixed ring is fixedly connected to the second telescopic bar and the first adjustment frame, respectively, and is located between the second telescopic bar and the first adjustment frame; the plurality of the straightening mechanisms are respectively arranged on one side of the first semi-fixed ring and the second semi-fixed ring.

2. A casing centralizer for downhole oil production operations according to claim 1, characterized in that: The first positioning member includes a first locking screw, a first knob and a first pin. The first locking screw is threadedly connected to the first adjustment frame and is located on one side of the first adjustment frame; the first knob is fixedly connected to the first locking screw and is located on one side of the first locking screw; the first pin is fixedly connected to the first locking screw and is located on one side of the first locking screw.

3. A casing centralizer for downhole oil production operations according to claim 2, characterized in that: The second positioning member includes a second locking screw, a second knob and a second pin. The second locking screw is threadedly connected to the second adjustment frame and is located on one side of the second adjustment frame; the second knob is fixedly connected to the second locking screw and is located on one side of the second locking screw; the second pin is fixedly connected to the second locking screw and is located on one side of the second locking screw.

4. A casing centralizer for downhole oil production operations according to claim 3, characterized in that: The straightening mechanism includes an operating box, a clamping strip, a guide wheel and an adjusting wheel. The operating box is fixedly connected to the first semi-fixed ring and is located on one side of the first semi-fixed ring; the clamping strip is slidably connected to the operating box and is located on one side of the operating box; the guide wheel is arranged on one side of the clamping strip; and the adjusting wheel is arranged on one side of the operating box.

5. A casing centralizer for downhole petroleum production according to claim 4, characterized in that: The straightening mechanism further includes a connecting block and an arc-shaped abutting block, wherein the connecting block is fixedly connected to the clamping strip and is located on one side of the clamping strip; the arc-shaped abutting block is fixedly connected to the connecting block and is located on one side of the connecting block.

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