CN220690663U - Tension testing rod for threaded joint of petroleum drill rod - Google Patents

Abstract

The utility model discloses a tension testing rod for a threaded joint of an oil drill rod, which relates to the field of physicochemical testing of metal components, and comprises an internal thread rotating part, an external thread connecting part, an upper hook part and a lower pull rod part; the utility model mainly aims at the problem of insufficient qualitative test precision in the prior art, and provides a tension test rod for a threaded joint of an oil drill rod, which has simple and reasonable structure, easy manufacture and convenient quantitative detection, wherein the joint structure in the test rod is identical with the structure and parameters of a test piece to be tested, the obtained test result is true and reliable, and the tensile strength of the threaded fastener of the oil drill rod joint can be objectively and quantitatively evaluated.

Description

Tension testing rod for threaded joint of petroleum drill rod

Technical Field

The utility model relates to the field of physicochemical testing of metal components, in particular to a tension testing rod for a threaded joint of an oil drill rod.

Background

The oil drill rod is one of the most important tools in oil drilling engineering, and the conventional oil drilling depth exceeds kilometers, so that the oil drill rod is effectively lengthened in an axial joint mode in reality, and the lengthened oil drill rod can reach the expected depth of oil drilling. From the structure, the petroleum drill rod belongs to a typical slender pipe fitting, the upper section and the lower section are connected in a section mode by adopting a unified internal and external thread mutual-fit connection structure, the length of each standard petroleum drill rod is about 10 meters, the weight is 100-350KG, the accumulated weight generated in the later drilling period reaches tens of tons due to the long length of the section of the drill rod, and the drill rod of the drilling machine applies torque during drilling, so that the preset thread buckle load at the two ends of the petroleum drill rod at the wellhead end is larger and larger. In order to ensure the drilling safety and avoid tripping accidents, the petroleum drill rod manufacturer needs to strengthen the quality detection of the matching of the internal thread and the external thread.

CN213016213U discloses an oil drill rod internal thread joint, through adopting card post and turning block to cooperate and use, can carry out effectual spacing to the bolt, and then can not produce not hard up after guaranteeing that the bolt is connected with the nut, and then can not take place to drop, the effectual stability of guaranteeing the drilling rod when using, the security of also guaranteeing its in the use simultaneously.

For example, the threaded connector of the petroleum drill rod is commonly detected by using a test rod made of homogeneous metal of the drill rod connector, and the qualitative test mode is simple and has low test cost. However, the technical scheme only qualitatively judges the quality of the product, and cannot objectively and quantitatively evaluate the tensile strength of the screw thread prepared by the oil drill pipe joint, and along with the reduction of natural petroleum resources, the modern petroleum drilling depth is deeper and deeper, so that a user has higher requirements on the tensile strength of the joints at the two ends of the purchased oil drill pipe, and manufacturers must provide quantitative values of the tensile strength of the joints at the two ends of the oil drill pipe for the user according to industry standard regulations so as to be used for guiding the safe production of the petroleum drilling.

Disclosure of Invention

The utility model provides an oil drill rod threaded joint tensile test rod, which can accurately and quantitatively detect the tensile strength of an oil drill rod threaded joint, meets the requirement of a user on tensile strength data of the oil drill rod, achieves the technical effect which cannot be achieved by the prior art, and achieves the aims of improving the detection precision and the use safety.

In order to solve the problems, the utility model provides a tension testing rod for a threaded joint of an oil drill rod, which comprises an internal thread rotating part, an external thread connecting part, an upper hook part and a lower pull rod part; the internal thread rotating component and the external thread connecting component are of a pair of joint structures which are connected through taper threads, the joint structures are of straight pipe structures, a ring buckle is axially connected to the inner outer end face of each joint structure, the lower pull rod portion is a T-shaped member, the large diameter section of each lower pull rod portion is in clearance fit with the large diameter inner hole of the joint structure, the small diameter section of each lower pull rod portion is downwards inserted into the inner hole of the joint structure until the small diameter section of each lower pull rod portion extends out of the joint structure, the exposed section of each lower pull rod portion serves as a lower clamping section of the tensile testing machine, the upper hook component comprises a hook portion and a straight shank section, the downward hook portion hooks the ring buckle, and the upward straight shank section serves as an upper clamping section of the tensile testing machine.

Preferably, the cross sections of the straight shank section of the upper hook component and the small diameter section of the lower pull rod part are circular, and the areas are equal.

Preferably, the internal thread rotating component is an internal thread sleeve, and the external end surface of the small end of the internal thread sleeve with the built-in cone thread is axially connected with a ring buckle.

Preferably, the external thread connecting component is an external thread joint, the internal hole of the external thread joint comprises two sections of coaxial stepped holes, the stepped holes with small diameters are positioned at the large end of the internal taper thread, and the aperture of the stepped holes is smaller than 30mm.

Preferably, the internal thread rotating component is an internal thread joint, and an axial through hole is arranged at the small end of the internal taper thread of the internal thread joint, and the diameter of the axial through hole is smaller than 30mm.

Preferably, the external thread connecting component is an external thread plug, and a ring buckle is axially connected to the large end face of the external thread plug.

Preferably, the large diameter section of the lower tie rod portion is at least 10mm smaller than the diameter of the small end of the internal taper thread of the internally threaded joint.

Preferably, the hook cross-section is 5-10% larger than the straight shank section cross-sectional area.

Preferably, the upper hook member and the lower pull rod portion are made of the same material, so that errors caused by material property differences are avoided. The design reduces test errors and improves test accuracy.

Compared with the prior art, the utility model has the beneficial technical effects that:

1. the utility model mainly aims at the problem of insufficient qualitative test precision in the prior art, and provides the tension test rod for the threaded joint of the petroleum drill rod, which has the advantages of simple and reasonable structure, easy manufacture and convenient quantitative detection.

2. The utility model adopts the axial rod-shaped serial connection structure, has simple and reasonable structure, reliable connection and easy manufacture; the inner hole of the external thread joint component comprises two sections of coaxial stepped holes, the structure is simple and easy to manufacture, the connection is reliable, and the problem of low qualitative detection precision in the prior art is solved.

3. The joint structure prepared by the test rod is the same as the structure and parameters of the target to-be-tested piece, the obtained detection data is real and reliable, the tensile strength value of the external thread fastener can be objectively reflected, and the obtained quantized data can be used for guiding the petroleum drilling safety production. The design of the external thread joint part realizes that the test result is true and reliable, and the problem that the tensile strength of the petroleum drill rod joint cannot be quantitatively evaluated in the prior art is solved.

4. The hook part of the upper hook part can hook the ring buckle, and is connected with a tensile testing machine through the straight shank section of the upper hook part and the small diameter section of the lower pull rod part for applying tensile force. This construction facilitates connection to a tensile testing machine for applying a tensile force.

Drawings

Fig. 1 is a schematic structural assembly view of a tension test rod for a threaded joint of an oil drill rod according to a first embodiment.

Fig. 2 is a schematic structural section view of a tension test rod for a threaded joint of an oil drill rod according to a first embodiment.

Fig. 3 is a schematic perspective view of a tensile test rod for a threaded joint of an oil drill rod according to a first embodiment.

Fig. 4 is a schematic structural assembly view of a second embodiment oil drill pipe threaded joint tensile test rod.

Fig. 5 is a schematic structural section view of a second embodiment oil drill pipe threaded joint tensile test rod.

Fig. 6 is a schematic perspective view of a tension test rod for a threaded joint of an oil drill pipe according to a second embodiment.

In the figure: 1-internal thread rotating part, 101-internal thread sleeve, 102-internal thread joint, 103-ring buckle, 2-external thread connecting part, 201-external thread joint, 202-external thread plug, 3-upper hook part, 301-hook part, 302-straight shank section, 4-lower pull rod part, 401-large diameter section, 402-small diameter section and 403-exposed section.

Detailed Description

The utility model is further illustrated by the following figures and examples.

Embodiment one: as shown in fig. 1-3, the tension test rod for the threaded joint of the petroleum drill rod comprises an internal thread rotating part 1, an external thread connecting part 2, an upper hook part 3 and a lower pull rod part 4; the internal thread rotating part 1 is an internal thread sleeve 101, the external thread connecting part 2 is an external thread connector 201, the internal thread sleeve 101 is a matched set of the external thread connector 201 to be detected, and the two matched sets form a joint structure for simulating the connection of an upper section of petroleum drill rod and a lower section of petroleum drill rod by means of taper threads. In the structure, the internal thread sleeve 101 is a straight pipe structure, the inner wall of the internal thread sleeve is provided with an internal cone thread, a ring buckle 5 is axially connected on the outer end surface of a small section of the internal cone thread, the external thread connector 201 is a test piece, the external thread connector is also a straight pipe component, the inner hole of the external thread connector 201 is composed of two sections of coaxial stepped holes, the small diameter hole is positioned at the large end of the internal cone thread, the aperture of the small diameter hole is not more than 30mm, in the embodiment, the external thread connector 201 with the specification of 7 inches is centered, the diameter of the matched small diameter hole is phi 26mm, the specifications of the external cone thread and the internal cone thread of the configuration are equal, and the precision grade of the external thread connector is the same as that of a product to be detected. The lower pull rod part 4 is a T-shaped component, the large-diameter outer end is in clearance fit with the large-diameter inner hole of the external threaded connector 201, the small-diameter section 402 of the lower pull rod part 4 is downwards inserted into the inner hole of the external threaded connector 201 until the small-diameter section 402 of the lower pull rod part 4 extends out of the external threaded connector 2, the exposed section 403 of the lower pull rod part 4 serves as a lower clamping section of the tensile testing machine, the upper hook part 3 comprises a hook part 301 and a straight shank section 302, the downward hook part 301 hooks the ring buckle 5, and the upward straight shank section 302 serves as an upper clamping section of the tensile testing machine.

The embodiment reasonably converts the coupling structure of the petroleum drill rod section into a form of a tensile test rod, so that the tensile strength of the external screw head of the petroleum drill rod can be accurately measured by using a tensile testing machine. According to the design specification of the tensile test rod, the upper clamping section and the lower clamping section are designed with equal strength. Therefore, the cross sections of the small diameter section 402 of the lower pull rod portion 4 and the straight shank section 302 of the upper hook member 3 are both circular, and the two pieces are required to have the same area and the same material, in view of the structural specificity of the upper hook member 3, the hook portion 301 is stressed more complex than the straight shank section 302, and in order to avoid deformation of the hook portion 301, the hook portion 301 is thickened structurally, that is, the cross section of the hook portion 301 is required to be 5-10% larger than the cross section of the straight shank section 302, and the optimal mode of this embodiment is a value of 6%.

Embodiment two: as shown in fig. 4 to 6, the tension test rod for the threaded joint of the petroleum drill rod comprises an internal thread rotating part 1, an external thread connecting part 2, an upper hook part 3 and a lower pull rod part 4; the internal thread rotating part 1 is an internal thread joint 102, the external thread connecting part 2 is an external thread plug 202, the external thread plug 202 is a matched set of the internal thread joint 102 to be detected, and the two matched sets form a joint structure for simulating the connection of an upper section of petroleum drill rod and a lower section of petroleum drill rod by means of taper threads. In the structure, an outer cone thread is arranged on the outer wall of the outer thread plug 202, an inner cone thread is arranged in the inner hole of the test piece inner thread joint 102, and the outer cone thread and the inner cone thread have the same specification. In order to test the tensile strength of the internal taper thread of the internal threaded joint 102 of the petroleum drill rod conveniently, the embodiment adopts a structural design of a simulated tensile test rod, so that the tensile strength of the internal threaded joint 102 of the petroleum drill rod can be accurately measured by using a commodity tensile tester. The second technical measure is that the internal threaded joint 102 is made into a straight tube shape, an axial through hole is reserved in the middle of a small short part of an internal conical thread, and the embodiment is used for testing the internal threaded joint 102 of a petroleum drill rod with the caliber of 7 inches, so that the specification is centered, and the diameter of the axial through hole reserved in the internal threaded joint 102 takes a value of phi 25mm, so that the matching requirement can be met. The lower rod 4 is a T-shaped member, and the large diameter section 401 of the lower rod 4 is smaller than the small section of the internal taper thread of the female screw joint 102 by 12mm in this embodiment for convenience of installation work. When the pull rod is installed, the small-diameter section 402 of the lower pull rod 4 is downwards inserted into the axial through hole reserved in the internal threaded joint 102, and the exposed section 403 of the lower pull rod 4 extending from the internal threaded joint 102 serves as a lower clamping section of the tensile testing machine. The rest of the technical proposal is the same as the first embodiment.

The first and second embodiments have simple and reasonable structures, and are convenient for clamping two ends and performing tensile test by using a commodity tensile testing machine, so that the tensile strength value of the external cone thread of the external threaded connector 201 or the internal cone thread of the internal threaded connector 102 of the petroleum drill rod can be accurately and rapidly measured, and the obtained quantized data can be used as an important basis for guiding the petroleum drilling safety operation of a user.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present utility model, relational terms such as "first" and "second" and the like are 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. Moreover, 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, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features of the utility model described herein.

Claims (8)

1. A tension testing rod for a threaded joint of an oil drill rod comprises an internal thread rotating component (1), an external thread connecting component (2), an upper hook component (3) and a lower pull rod part (4); the internal thread rotating part (1) and the external thread connecting part (2) are of a pair of joint structures which are connected by adopting taper threads, and the device is characterized in that: the connector structure is of a straight pipe structure, a ring buckle (5) is axially connected to the inner end face of the connector structure, the lower pull rod part (4) is of a T-shaped member, the large-diameter section (401) of the lower pull rod part is in clearance fit with the large-diameter inner hole of the connector structure, the small-diameter section (402) of the lower pull rod part (4) is downwards inserted into the inner hole of the connector structure until the small-diameter section (402) of the lower pull rod part (4) extends out of the connector structure, the exposed section (403) of the lower pull rod part (4) serves as a lower clamping section of the tensile testing machine, the upper hook part (3) comprises a hook part (301) and a straight shank section (302), the hook part (301) facing downwards hooks the ring buckle (5), and the straight shank section (302) facing upwards serves as an upper clamping section of the tensile testing machine.

2. The oil drill pipe threaded joint tensile test bar according to claim 1, wherein: the cross sections of the straight shank section (302) of the upper hook component (3) and the small diameter section (402) of the lower pull rod part (4) are circular, and the areas are equal.

3. The oil drill pipe threaded joint tensile test bar according to claim 2, wherein: the internal thread rotating component (1) is an internal thread sleeve (101), and the external end surface of the small end of the internal thread sleeve (101) with the built-in cone thread is axially connected with a ring buckle (5).

4. The oil drill pipe threaded joint tensile test bar according to claim 3, wherein: the external thread connecting component (2) is an external thread connector (201), the inner hole of the external thread connector (201) comprises two sections of coaxial stepped holes, the stepped holes with small diameters are positioned at the large end of the internal taper thread, and the aperture of the stepped holes is smaller than 30mm.

5. The oil drill pipe threaded joint tensile test bar according to claim 2, wherein: the internal thread rotating component (1) is an internal thread joint (102), an axial through hole is formed in the small end of the internal taper thread of the internal thread joint (102), and the diameter of the axial through hole is smaller than 30mm.

6. The oil drill pipe threaded joint tensile test bar according to claim 5, wherein: the external thread connecting component (2) is an external thread plug (202), and a ring buckle (5) is axially connected to the large end face of the external thread plug (202).

7. The oil drill pipe threaded joint tensile test bar of claim 6, wherein: the large diameter section (401) of the pull-down rod part (4) is at least 10mm smaller than the diameter of the small end of the internal taper thread of the internal thread joint.

8. The oil drill pipe threaded joint tensile test bar according to claim 4 or 7, wherein: the cross section of the hook part (301) is 5-10% larger than the cross section area of the straight shank section (302).