Annulus test fixing and adjusting device

Abstract

The invention relates to the technical field of oil field well logging, in particular to an annulus test fixing and adjusting device to solve the problem that a test nipple is prone to deformation or fracture in an oil field pumping well annulus test. The device comprises a fixing assembly and an adjusting assembly. The fixing assembly comprises a fixing frame, a first holding clamp and a second holding clamp. The first holding clamp is detachably connected with the fixed frame; the second holding clamp is in sliding connection with the fixed frame and is detachably connected with the adjusting assembly; a first clamping ring and a second clamping ring which are matched with the outer diameter of a Christmas tree are respectively arranged on the opposite sides of the first holding clamp and the second holding clamp; the adjusting assembly can adjust the distance between the second holding clamp and the first holding clamp, the testing short section and the Christmas tree are tightly connected together, acting force can be effectively transmitted, stress borne by the testing short section is reduced, deformation or breakage is prevented, and the testing short section has the advantages that slipping is avoided, the working intensity of operators is reduced, and safety is improved.

Description

Technical Field

[0001] This invention relates to the field of oilfield logging technology, and in particular to a fixed adjustment device for annular testing. Background Technology

[0002] Currently, in annular testing of oil wells in oilfields, the blowout preventer test subs installed at the wellhead are affected by the wellhead production equipment and testing processes. This affects their outer diameter, wall thickness, dimensions, and materials, making it difficult for the sub body to withstand large torsional and bending moments. In particular, in heavy oil wells, when there is severe dead oil in the annular space of the wellbore, when instruments become entangled downhole, or when instruments or tools get stuck downhole, the forces exerted on the wellhead test subs are even greater. This can easily lead to deformation and breakage of the threaded connection at the bottom of the test subs, causing instruments to fall into the well. If the wellhead casing pressure is high, it can even lead to oil and gas leaks and uncontrolled blowouts.

[0003] To address this issue, a common practice is to bind the test section and the wellhead Christmas tree together with a steel wire rope (or flexible rope). This transfers the force on the test section to the Christmas tree, mitigating the problem. However, after the force is released inside the well, the steel wire rope (or flexible rope) binding the wellhead can slip, requiring repeated binding and tightening by operators, increasing labor intensity. Furthermore, the steel wire rope is prone to entanglement with the downhole tubing during testing, necessitating frequent rotation of the wellhead tubing on the surface for untangling. Traditional binding methods also cannot achieve synchronous rotation between two different tubing components at the wellhead, failing to fully meet the requirements of testing operations. Summary of the Invention

[0004] This invention provides an annulus testing fixing and adjustment device to alleviate the problem of easy deformation or breakage of test sections during annulus testing of oilfield pumping wells.

[0005] To alleviate the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0006] This invention provides a fixed adjustment device for annular testing.

[0007] Includes fixed components and adjustable components;

[0008] The fixing components include a fixing frame, a first clamp, and a second clamp;

[0009] The first clamp is detachably connected to the fixed frame;

[0010] The second clamp is slidably connected to the fixed frame and detachably connected to the adjustment component;

[0011] The first clamp and the second clamp have a first retaining ring and a second retaining ring on opposite sides that match the outer diameter of the oil well tree, respectively;

[0012] The adjustment component can adjust the distance between the second clamping card and the first clamping card.

[0013] Furthermore,

[0014] Both the first and second retaining rings have multiple rollers on their surfaces.

[0015] Furthermore,

[0016] The fixed frame includes side wing stiffeners and fixed stiffeners;

[0017] Two side wing stiffeners are respectively set at the upper and lower ends of the fixed stiffener and are detachably connected to the fixed stiffener.

[0018] Furthermore,

[0019] The side ribs have slots;

[0020] The upper and lower ends of the second card have guide rings that cooperate with the card slot;

[0021] The guide ring is slidably connected to the slot.

[0022] Furthermore,

[0023] The side ribs have slots;

[0024] The slot is L-shaped;

[0025] The first retainer has protrusions at its upper and lower ends that mate with the slot;

[0026] The protrusion and the slot are slidably connected.

[0027] Furthermore,

[0028] The adjustment assembly includes an adjustment screw and a rotating rod;

[0029] The adjusting screw is threaded with the fixing rib plate, and one end passes through the fixing rib plate and is detachably connected to the second clamp, while the other end is fixedly connected to the rotating rod.

[0030] Furthermore,

[0031] A rotating shaft is provided at the connection between the second clamp and the adjusting screw;

[0032] When the control screw rotates, it can cause the second clamp to move within the range of the slot.

[0033] Furthermore,

[0034] A rubber handle is provided at the end of the rotating rod away from the adjusting screw.

[0035] The beneficial effects of this invention are analyzed as follows:

[0036] This solution provides a fixed adjustment device for annular testing, including a fixing component and an adjustment component. The fixing component includes a fixing frame, a first clamp, and a second clamp. The first clamp is detachably connected to the fixing frame. The second clamp is slidably connected to the fixing frame and detachably connected to the adjustment component. The first clamp and the second clamp have a first retaining ring and a second retaining ring on opposite sides that match the outer diameter of the Christmas tree. The adjustment component can adjust the distance between the second clamp and the first clamp, tightly connecting the test section to the Christmas tree. This effectively transmits forces, reduces stress on the test section, prevents deformation or breakage, and has the advantages of avoiding slippage, reducing operator workload, and improving safety. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0039] Figure 2 This is a top view of the present invention;

[0040] Figure 3 This is a schematic diagram of the first clamping device.

[0041] icon:

[0042] 100-Fixing component; 110-Fixing frame; 111-Side rib plate; 112-Fixing rib plate; 113-Slot; 114-Slot; 120-First clamp; 121-First retaining ring; 122-Protrusion; 130-Second clamp; 131-Second retaining ring; 132-Guide ring; 140-Roller;

[0043] 200 - Adjustment component; 210 - Adjustment screw; 220 - Rotating rod; 221 - Rubber handle. Detailed Implementation

[0044] In annular testing of oilfield pumping wells, the outer diameter, wall thickness, dimensions, and material of the blowout preventer (BOP) test sub are limited due to the influence of wellhead production equipment and testing processes. This makes it difficult for the sub to withstand large torques and bending moments, especially in heavy oil wells and when stuck downhole. This can easily lead to deformation or breakage of the threaded connection of the sub, causing the instrument to fall into the well or resulting in oil and gas leaks and uncontrolled blowouts. To solve this problem, steel wire ropes or soft ropes are usually used to tie the test sub to the wellhead Christmas tree to reduce the force on the sub. However, this tying method carries the risk of slippage and requires frequent adjustments by operators, increasing labor intensity. Furthermore, the tying method can easily cause the steel wire rope to become entangled with the downhole tubing and cannot achieve synchronous rotation between different tubing equipment at the wellhead, failing to fully meet the needs of testing operations.

[0045] In view of this, such as Figures 1 to 3 As shown, this solution provides a ring test fixing and adjustment device to alleviate the above problems. The device includes a fixing component 100 and an adjustment component 200.

[0046] The fixing component 100 includes a fixing frame 110, a first retaining clip 120, and a second retaining clip 130;

[0047] The first clamp 120 is detachably connected to the fixed frame 110;

[0048] The second clamp 130 is slidably connected to the fixed frame 110 and detachably connected to the adjustment component 200;

[0049] The first retaining clip 120 and the second retaining clip 130 have a first retaining ring 121 and a second retaining ring 131 on opposite sides that match the outer diameter of the oil well tree, respectively;

[0050] The adjustment component 200 can adjust the distance between the second clamp 130 and the first clamp 120.

[0051] During annular testing, the first retaining ring 121 and the second retaining ring 131 are first fitted onto the test sub and the outside of the wellhead. Then, the distance between the first retaining ring 121 and the second retaining ring 131 is adjusted by the adjusting component 200 to ensure that the test sub and the wellhead are tightly fixed together. During testing, the force on the test sub can be transferred to the wellhead, reducing the force on the test sub and preventing deformation or breakage. Furthermore, there is no risk of slippage after installation, reducing the workload of operators and improving safety.

[0052] like Figure 1 and Figure 3As shown, preferably, both the first retaining ring 121 and the second retaining ring 131 are provided with multiple rollers 140. When the downhole instruments or wires connected to the test sub become entangled in the annular space of the tubing or the tubing string gets stuck, the rollers 140 on the first retaining ring 121 and the second retaining ring 131 can assist the Christmas tree and the test sub to rotate synchronously to unblock the tubing, thereby ensuring construction safety.

[0053] Regarding the shape and structure of the fixed frame 110, such as Figure 1 and Figure 2 As shown:

[0054] The fixed frame 110 includes side wing stiffeners 111 and fixed stiffeners 112;

[0055] Two side ribs 111 are respectively set at the upper and lower ends of the fixed rib 112 and are detachably connected to the fixed rib 112. The upper and lower ends of the fixed rib 112 are provided with threaded holes, and the side ribs 111 are provided with through holes that mate with the threaded holes. Before use, they are fixedly connected by screws. After use, the screws are removed, and the various parts can be disassembled for transportation, so as to facilitate the transportation of equipment in the field.

[0056] The side rib plate 111 has a slot 113;

[0057] The upper and lower ends of the second card 130 have guide rings 132 that cooperate with the card slot 113;

[0058] The guide ring 132 is slidably connected to the slot 113; the guide ring 132 is installed at the upper and lower ends of the second clamp 130 by locking screws, which can assist the second clamp 130 to move along the slot 113, avoid the second clamp 130 directly rubbing against the slot 113, and improve the service life of the equipment.

[0059] The side rib plate 111 has a slot 114;

[0060] Slot 114 is L-shaped;

[0061] The first retainer 120 has protrusions 122 at its upper and lower ends that mate with the slot 114;

[0062] The protrusion 122 is slidably connected to the slot 114; Figure 2From a perspective, the slot 114 consists of a horizontal slot and a vertical slot. The horizontal center of the horizontal slot is aligned with the horizontal center of the slot 113. One end of the vertical slot is connected to the horizontal slot, and the other end has an opening. To prevent the first clamp 120 from loosening after installation, the length of the horizontal slot is much greater than the length of the protrusion 122. To facilitate the installation and removal of the first clamp 120, the width of the vertical slot is slightly greater than the length of the protrusion 122. When fixing the tree and the test section, the second clamp 130 is first connected to the fixing frame 110, leaving an opening for fitting the tree and the test section on the side away from the second clamp 130. After the fixing frame 110 passes through the tree and the test section, the first clamp 120 is then installed on the side wing stiffener 111.

[0063] In this design, the fixed frame 110 is made of 45# stainless steel with a length of 100mm, a width of 50mm, and a thickness of 20mm, and the side rib plate 111 is made of 45# stainless steel with a length of 290mm, a width of 50mm, and a thickness of 10mm. In practical applications, the appropriate size and material can be selected according to the size of the wellhead and test section and the application scenario.

[0064] Regarding the shape and structure of the adjustment component 200, as follows: Figure 1 As shown:

[0065] The adjustment assembly 200 includes an adjustment screw 210 and a rotating rod 220;

[0066] The adjusting screw 210 is threaded with the fixing rib plate 112, and one end passes through the fixing rib plate 112 and is detachably connected to the second clamp 130, while the other end is fixedly connected to the rotating rod 220.

[0067] A rotating shaft is provided at the connection between the second clamp 130 and the adjusting screw 210;

[0068] When the rotating rod 220 controls the adjusting screw 210 to rotate, the adjusting screw 210 can drive the second clamp 130 to move within the range of the clamping slot 113; after the first clamp 120 is engaged with the side wing stiffener 111, the distance between the first clamp 120 and the second clamp 130 is adjusted by the rotating rod 220 to complete the initial fixation of the oil well tree and the test section; more preferably, a rubber handle 221 is provided at the end of the rotating rod 220 away from the adjusting screw 210 to facilitate the operator to control the rotating rod 220.

[0069] The installation steps for this device are as follows:

[0070] S1: Assemble adjustment component 200;

[0071] S2: Connect the end of the adjusting screw 210 away from the rotating rod 220 to the fixed rib plate 112 and pass it through;

[0072] S3: Rotately connect the second clamp 130 to the adjusting screw 210;

[0073] S4: After passing the slot 113 on the side wing stiffener 111 through the guide ring 132, use screws to fix the side wing stiffener 111 to the fixed stiffener 112.

[0074] S5: Pass the assembled components through the wellhead and test section, and then insert the protrusion 122 on the first clamp 120 into the side wing stiffener 111 along the opening on the slot 114;

[0075] S6: Rotate the rotating rod 220 to lock and fix the oil well tree and the test section.

[0076] The beneficial effects of this plan are analyzed as follows:

[0077] To address the issue of test sections easily deforming or breaking during annular testing of oilfield pumping wells, this solution provides an annular testing fixing and adjusting device. This device, through a fixing component 100 and an adjusting component 200, tightly secures the test section to the wellhead. The fixing component 100 includes a fixing frame 110, a first clamp 120, and a second clamp 130, effectively transmitting forces, reducing stress on the test section, preventing deformation or breakage, and offering advantages such as preventing slippage, reducing operator workload, and improving safety. Furthermore, the roller 140 in this device assists in releasing the clamps, ensuring construction safety and improving the efficiency and reliability of testing operations.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ring test fixing and adjustment device, characterized in that: It includes a fixing component (100) and an adjusting component (200); The fixing component (100) includes a fixing frame (110), a first clamp (120), and a second clamp (130); The first clamp (120) is detachably connected to the fixed frame (110); The second clamp (130) is slidably connected to the fixed frame (110) and detachably connected to the adjusting component (200); The first clamp (120) and the second clamp (130) have a first retaining ring (121) and a second retaining ring (131) on the opposite side, which are matched with the outer diameter of the oil well tree, respectively; The adjustment component (200) can adjust the distance between the second holding card (130) and the first holding card (120).

2. The annular test fixing and adjusting device according to claim 1, characterized in that: Both the first retaining ring (121) and the second retaining ring (131) have multiple rollers (140) on their surfaces.

3. The annular test fixing and adjusting device according to claim 2, characterized in that: The fixed frame (110) includes side wing stiffeners (111) and fixed stiffeners (112); The two side wing stiffeners (111) are respectively disposed at the upper and lower ends of the fixed stiffener (112) and are detachably connected to the fixed stiffener (112).

4. The annular test fixing and adjusting device according to claim 3, characterized in that: The side wing stiffener (111) has a slot (113); The second retainer (130) has guide rings (132) at its upper and lower ends that cooperate with the retainer slot (113); The guide ring (132) is slidably connected to the slot (113).

5. The annular test fixing and adjusting device according to claim 4, characterized in that: The side wing stiffener (111) has a slot (114); The slot (114) is L-shaped; The first retainer (120) has protrusions (122) at its upper and lower ends that cooperate with the slot (114); The protrusion (122) is slidably connected to the slot (114).

6. The annular test fixing and adjusting device according to claim 5, characterized in that: The adjustment assembly (200) includes an adjustment screw (210) and a rotating rod (220); The adjusting screw (210) is threaded to the fixing rib plate (112), and one end passes through the fixing rib plate (112) and is detachably connected to the second clamp (130), while the other end is fixedly connected to the rotating rod (220).

7. The annular test fixing and adjusting device according to claim 6, characterized in that: A rotating shaft is provided at the connection between the second clamp (130) and the adjusting screw (210); When the rotating rod (220) controls the adjusting screw (210) to rotate, the adjusting screw (210) can drive the second clamp (130) to move within the range of the clamp slot (113).

8. The annular test fixing and adjusting device according to claim 7, characterized in that: A rubber handle (221) is provided at the end of the rotating rod (220) away from the adjusting screw (210).

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