Hydraulic clamp sucker rod main clamp mechanism

Abstract

The utility model relates to the technical field of oil field machinery, in particular to a hydraulic clamp sucker rod main clamp mechanism. Comprising a main clamp, a jaw plate is arranged on a jaw, and a tooth block assembly is arranged on the jaw plate and used for clamping a sucker rod; the tooth block assembly comprises an upper tooth block assembly and a lower tooth block assembly; the upper tooth block assembly is arranged on the upper jaw plate and used for clamping a wrench of a sucker rod and the upper portion of the wrench. The lower tooth block assembly is arranged on the lower jaw plate and used for clamping the connecting part of the sucker rod. The upper tooth block assembly comprises an L-shaped first clamping plate and a second clamping plate provided with a cambered surface clamping opening structure, the first clamping plate is used for clamping a square wrench, and the second clamping plate is used for clamping the upper portion of the square wrench. According to the split type clamping system, through the synergistic effect of an upper tooth block assembly and a lower tooth block assembly, traditional single-point clamping is improved into a three-stage stress distribution structure including a wrench square plane clamping area, a rod body cambered surface uniform load area and a threaded part multi-point dispersion clamping area, the clamping area is enlarged, and rod body deformation is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield machinery technical field, concretely relates to a kind of hydraulic tong sucker rod main tong mechanism. BACKGROUND

[0002] In oilfield operation, as the core component connecting surface pumping unit and downhole pump, the rod body structure of sucker rod has particularity: the upper part is provided with square column wrench square, for pipe tong occlusion, middle part is cylindrical rod body, lower part is processed with precision threaded connection part.

[0003] Traditional hydraulic tong uses overall type plane jaw plate clamping, there is technical defect: 1, clamping force concentrates in local part, under the action of rated working pressure, it is easy to produce contact stress exceeding the yield strength of material, leading to rod body surface crushing deformation;2, clamping contact area is insufficient, it is easy to slip relative when torque is loaded, causing threaded pair damage;3, lack of adaptive design to wrench square structure, clamping position needs to be adjusted frequently during operation. SUMMARY

[0004] The utility model provides a kind of hydraulic tong sucker rod main tong mechanism, its purpose is to avoid the damage of sucker rod clamping, improve clamping stability.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] A kind of hydraulic tong sucker rod main tong mechanism, including main tong, jaw is provided with jaw plate, including: the jaw plate is provided with tooth block assembly, for clamping sucker rod;

[0007] The tooth block assembly includes upper tooth block assembly and lower tooth block assembly;

[0008] The upper tooth block assembly is arranged on upper jaw plate, for clamping the wrench square and the upper part of sucker rod;

[0009] The lower tooth block assembly is arranged on lower jaw plate, for clamping the connection part of sucker rod.

[0010] Further, the upper tooth block assembly includes L-shaped first clamping plate and second clamping plate provided with arc clamping port structure, the second clamping plate is fixed on the first clamping plate, the first clamping plate is used to clamp the wrench square, and the second clamping plate clamps the upper part of the wrench square.

[0011] Further, the clamping port front part of the second clamping plate is provided with slope, to facilitate the entry of sucker rod.

[0012] Further, in the state of clamping sucker rod, the clamping port tail of two second clamping plates is staggered, to increase clamping stability.

[0013] Further, the clamping surface of the first clamping plate is a plane, and both sides of the clamping surface are protruded.

[0014] Further, the lower tooth block assembly is an arc surface composed of a plurality of tooth blocks, and the surface of the tooth block is provided with a protrusion to increase the friction force of clamping.

[0015] Further, the upper tooth block assembly and the lower pressing block assembly are provided with clamping protrusions which are matched with the grooves of the upper jaw plate and the lower jaw plate and are fixedly connected through bolts.

[0016] The utility model discloses reached beneficial effects are:

[0017] The split type clamping system improves the traditional single-point clamping into a three-stage stress distribution structure through the cooperation of the upper tooth block assembly and the lower tooth block assembly, i.e. a wrench square plane clamping area, a rod body arc surface uniform load area and a threaded part multi-point dispersed clamping area, so that the clamping area is increased and the rod body deformation is avoided.

[0018] The L-shaped first clamping plate realizes structure adaptation, the front part of the second clamping plate is guided into a slope surface, the axial positioning time of the sucker rod is shortened, and the tail staggered structure improves the anti-sliding ability.

[0019] The modular clamping structure is matched with replaceable tooth blocks, the replacement time of the key friction pairs is shortened, the arc surface array protrusions of the lower tooth block assembly can maintain sufficient friction coefficient and avoid sliding. DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in the drawings without the creative labor for the ordinary skilled in the art.

[0021] Fig. 1 It is a kind of hydraulic tong sucker rod main tong mechanism overall structure schematic diagram;

[0022] Fig. 2 It is a kind of hydraulic tong sucker rod main tong mechanism plan view;

[0023] In the drawing, 1, main tong;11, upper jaw plate;12, lower jaw plate;13, upper tooth block assembly;131, first clamping plate;1311, arc surface clamping mouth;1312, slope surface guide structure;1313, staggered tail limiting structure;132, second clamping plate;1321, limiting structure;14, lower tooth block assembly;141, tooth block;2, sucker rod;21, wrench square;22, connecting portion.

[0024] The purposes, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0027] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes. Taking "A and / or B" as an example, it includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled personnel in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0028] As shown in Figs. 1-2 A hydraulic tong pumping rod main tong mechanism, including main tong 1, the tong mouth is provided with a jaw plate, comprising: the jaw plate is provided with a jaw block 141 assembly, for clamping pumping rod 2.

[0029] The main tong 1 is the main frame of the whole mechanism, bearing and fixing the jaw plate and the jaw block 141 assembly, providing the mechanical support and power transmission path required for clamping the pumping rod 2. The main tong 1 is driven to open and close by the hydraulic system, realizing the clamping and releasing of the pumping rod 2.

[0030] The jaw plate is installed on the jaw of the main clamp as the carrier of the jaw block 141 assembly, transmits the clamping force of the main clamp 1 to the jaw block 141 assembly, and realizes clamping by contacting the sucker rod 2 through the jaw block 141 assembly. The jaw plate is divided into an upper jaw plate 11 and a lower jaw plate 12, which correspond to the installation of the upper jaw block assembly 13 and the lower jaw block assembly 14 respectively. The surface is designed with a groove and a clamping structure matched with the jaw block 141 assembly to ensure the accurate positioning and reliable fixation of the jaw block 141 assembly.

[0031] The jaw block 141 assembly includes an upper jaw block assembly 13 and a lower jaw block assembly 14; the upper jaw block assembly 13 is arranged on the upper jaw plate 11 and is used for clamping the wrench side 21 of the sucker rod 2 and the upper side thereof; and the lower jaw block assembly 14 is arranged on the lower jaw plate 12 and is used for clamping the connecting part 22 of the sucker rod 2.

[0032] The upper jaw block assembly 13 includes an L-shaped first clamping plate 131 and a second clamping plate 132 provided with an arc clamping port 1311 structure, and the second clamping plate 132 is fixed on the first clamping plate 131, the first clamping plate 131 is used for clamping the wrench side 21, and the second clamping plate 132 clamps the upper side of the wrench side 21.

[0033] The L-shaped first clamping plate 131 is adapted to the square column wrench side 21 of the upper part of the sucker rod 2, and realizes the planar clamping of the wrench side 21. The clamping surface of the first clamping plate 131 is a plane, and the two sides of the clamping surface are protruded to form a limiting structure 1321 to prevent the wrench side 21 from sliding laterally during clamping. The planar clamping surface increases the contact area with the wrench side 21, uniformly distributes the clamping force to the planar area of the wrench side 21, avoids the local stress concentration caused by the traditional single-point clamping, and conforms to the mechanical properties of the wrench side 21 of the sucker rod 2.

[0034] The front opening of the clamping port of the second clamping plate 132 is provided with a slope surface to facilitate the entry of the sucker rod 2. In the clamping state of the sucker rod 2, the tail parts of the clamping ports of the two second clamping plates 132 are staggered with each other to increase the clamping stability.

[0035] The arc clamping port 1311 adopts an arc surface structure matched with the diameter of the rod body, so that the clamping force is distributed to the circumference of the rod body, avoiding local crushing deformation and improving the clamping stability.

[0036] The front opening of the clamping port is provided with a slope surface to form a guide structure, which facilitates the quick alignment of the sucker rod 2 into the clamping port, shortens the axial positioning time, and improves the operation efficiency.

[0037] In the clamping state, the tail parts of the clamping ports of the two second clamping plates 132 are staggered with each other to form a cross limiting to enhance the anti-sliding ability of the rod body.

[0038] The lower tooth block assembly 14 is an arc surface composed of a plurality of tooth blocks 141, and the surface of the tooth block 141 is provided with a protrusion to increase the clamping friction. The surface of the tooth block 141 is provided with a protrusion to increase the friction coefficient with the threaded connection part 22, so as to provide greater friction under the same clamping force, prevent slip during torque transmission, and protect the threaded pair from damage.

[0039] The upper tooth block 141 block assembly and the lower pressing block assembly are provided with clamping protrusions which cooperate with the grooves of the upper jaw plate 11 and the lower jaw plate 12 and are fixedly connected through bolts. The clamping protrusions at the bottom of the tooth block 141 assembly accurately cooperate with the jaw plate grooves to form a mechanical positioning structure, ensuring the positional accuracy of the tooth block 141 assembly during installation and avoiding clamping failure caused by installation deviation. The bolts pass through the fixing holes of the tooth block 141 assembly and the jaw plate to fasten the two into one. The modular design enables individual tooth blocks 141 or assemblies to be replaced independently without the need to disassemble the jaw plate as a whole, shortens the replacement time of the key friction pair, and reduces maintenance costs.

[0040] The above is only an optional embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by utilizing the utility model specification and the attached drawings or directly / indirectly applied in other related technical fields under the utility model concept of the utility model is included in the patent protection range of the utility model.

Claims

1. A hydraulic tong and sucker rod master tong mechanism comprising a master tong, the tong having a jaw with a jaw plate disposed thereon, characterised in that, The jaw plate is provided with a tooth block (141) assembly for clamping the sucker rod (2). The tooth block (141) assembly includes an upper tooth block assembly (13) and a lower tooth block assembly (14). The upper tooth block assembly (13) is arranged on the upper jaw plate (11) and is used for clamping the wrench side (21) of the sucker rod (2) and above it. The lower tooth block assembly (14) is arranged on the lower jaw plate (12) and is used for clamping the connecting part (22) of the sucker rod (2).

2. The hydraulic clamp sucker rod main clamp mechanism according to claim 1, characterized in that: The upper tooth block assembly (13) includes an L-shaped first clamping plate (131) and a second clamping plate (132) provided with an arc clamping opening (1311) structure, the second clamping plate (132) is fixed on the first clamping plate (131), the first clamping plate (131) is used for clamping the wrench side (21), and the second clamping plate (132) clamps above the wrench side (21).

3. The hydraulic clamp sucker rod main clamp mechanism according to claim 2, characterized in that: The clamping opening front part of the second clamping plate (132) is provided with a slope surface, which facilitates the entry of the sucker rod (2). In the state of clamping the sucker rod (2), the clamping opening tail parts of the two second clamping plates (132) are staggered with each other, so as to increase the clamping stability.

4. A hydraulic tong rod master tong mechanism according to claim 2, wherein: The clamping surface of the first clamping plate (131) is a plane, and the two sides of the clamping surface are protruding.

5. A hydraulic tong rod master tong mechanism according to claim 2, wherein: The lower tooth block assembly (14) is an arc surface composed of a plurality of tooth blocks (141), the surface of the tooth block (141) is provided with a protrusion, so as to increase the clamping friction.

6. A hydraulic tong rod master tong mechanism according to claim 1, characterized in that: The upper tooth block (141) assembly and the lower pressing block assembly are provided with clamping protrusions, the clamping protrusions are matched with the grooves of the upper jaw plate (11) and the lower jaw plate (12), and are fixedly connected through bolts.

7. A hydraulic tong rod master tong mechanism according to claim 1, characterized in that: ​

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