CN200992955Y - High strength pipe coupling integrated oil pipe or casing - Google Patents

Abstract

An integrated oil tube or sleeve of the high strength pipe hoop relates to the field of the mechanical oil recovery equipment, in particular to an oil recovery in the oil field or an oil pipe and sleeve filled with liquid medium. The utility model comprises a pipe hoop, a pipe body and a pipe head that are processed into an integrated form through forging or friction welding; while one end of the new oil pipe or ths sleeve is an inner thread pipe hoop, whereas the other end is an outer thread pipe head; thus a connecting hoop is not needed to connect the oil pipe or sleeve, which is quite convenient and simple for operating and is safe and reliable in performance.

Description

A kind of high strength pipe collar integral type oil pipe or sleeve pipe

Affiliated technical field

A kind of high strength pipe collar integral type oil pipe or sleeve pipe relate to petroleum machinery oil production equipment field, recover the oil or fluid injection body medium oil pipe and sleeve pipe in specifically a kind of oil field.

Background technology

Modern oil exploitation is extensive use of the method for mechanical oil recovery, and oil recovery or fluid injection body medium are used oil pipe and sleeve pipe mostly.At present oil pipe or the sleeve pipe that uses is that externally threaded form is processed at two ends, and middle is the box cupling of internal thread with through hole, connects into oil pipe or casing string, and according to the oil recovery degree of depth of oil well, this tubing string extensible is to hundreds of rice even a few km.Finish owing to increase box cupling in the middle of the connection between the tube and tube needs separately, each is threaded and a little all will applies certain pretightning force, could guarantee the sealing of oil pipe or casing string.Because former oil pipe or sleeve pipe external screw thread and the processing of box cupling internal thread split multiple operation, be difficult to precision and concentricity that the assurance box cupling is connected with oil pipe or sleeve pipe, thereby cause oil pipe or casing string when underground work, to be threaded a little easily taking place loosening, cause seal failure, and then the connection of thread crude oil leakage causes double thread corrosion, reduced oil pipe or casing strength.

Loosening and lose the generation of the situation that reduces with oil pipe or casing strength for fear of the box cupling in shipment, the utility model is with oil pipe or casing coupling and body forges or the friction welding time processing is configured as integral type, the origination point of minimizing accident improves machining accuracy and concentricity and makes oil pipe or casing string more trend towards safe and reliable when underground work.

Summary of the invention

The purpose of this utility model provides and a kind ofly is threaded a little fewly, and the tubing string concentricity after the connection high safe and reliable a kind of high strength pipe collar integral type oil pipe or sleeve pipe satisfy in the mechanical oil recovery oil pipe or the sleeve pipe operation is easy, reliability is safe requirement.

The purpose of this utility model is achieved in that

A kind of high strength pipe collar integral type oil pipe or sleeve pipe are to be made of pipe collar, body and tube head disjunctor, pipe collar, body and tube head are made integral type through forging or friction welding time processing, making this kind oil pipe or sleeve pipe one end is the internal thread pipe collar, the other end is the external screw thread tube head, do not need to use separately box cupling to connect oil pipe or sleeve pipe, operation is easy, and is safe and reliable.

Compared with the prior art the utility model has the following advantages:

1, utilizes the internal and external threads at oil pipe or sleeve pipe two ends, self connect and prolong into tubing string, removed the box cupling of independent use, not only reduced half accident point that is threaded, and operation is easy, the reduction operating expenses than existing oil pipe or sleeve pipe.

2, since pipe collar and body through forging or friction welding is processed into and is integral type, box cupling can not lost in transportation and operation, has guaranteed that construction operation in time carries out.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the structure diagram of first embodiment of the utility model;

Fig. 2 is the structure diagram of second embodiment of the utility model;

1. pipe collars among the figure, 2. body, 3. tube head, 4. weld seam.

Specific embodiment

The purpose of this utility model can reach in the following manner:

Fig. 1 is first embodiment of the utility model:

Pipe collar (1), body (2) and tube head (3) are made integral type in the forging mode, and the one end is tapped pipe collar (1), and the other end is for being with externally threaded tube head (3).

Fig. 2 is second embodiment of the utility model:

Pipe collar (1), body (2) and tube head (3) are with the friction welding mode formula that links into an integrated entity, and the one end is tapped pipe collar (1), and the other end is for being with externally threaded tube head (3).

Claims (2)

1, a kind of high strength pipe collar integral type oil pipe or sleeve pipe is characterized in that: it is made of pipe collar (1), body (2) and tube head (3) disjunctor.

2, a kind of high strength pipe collar integral type oil pipe according to claim 1 or sleeve pipe, its feature also is: an end is tapped pipe collar (1), the other end is for being with externally threaded tube head (3).

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