CN205297436U - Modified fracturing, gas production be jackscrew mechanism for well head - Google Patents

Abstract

The utility model discloses a modified fracturing, gas production be jackscrew mechanism for well head, including jackscrew, pressure cap and the jackscrew hole of setting in the well head cross, the jackscrew is embedded into jackscrew hole through the pressure cap in, jackscrew hole is second grade bench hole the internal thread of pressing the cap is tightened in back tip setting to preceding tip and back tip, and processing is convenient, conveniently tests the internal screw thread quality, has both guaranteed the effect of jackscrew mechanism, and handling ease and quality testing again simultaneously, is equipped with the sealing washer, guarantees the sealed effect of jackscrew mechanism, has good application prospect.

Description

An improved jackscrew mechanism for fracturing and gas production wellheads

technical field

The utility model relates to an improved top wire mechanism for fracturing and gas production wellheads, which belongs to the technical field of petroleum gas exploitation equipment.

Background technique

At present, in the structure of the four-way jacking screw of the tubing head, the jacking screw thread is usually arranged at the innermost end of the jacking screw hole of the tubing head body. Since the jacking screw thread is located at the innermost end of the jacking screw hole, the thread must be machined with It is very inconvenient to use lengthened thread gauges for thread inspection, which not only increases the production cost, but also brings inconvenience to the quality control of jackscrew threads.

Contents of the invention

The purpose of the utility model is to overcome the problem that the existing top screw thread is located at the innermost end of the top screw hole, which increases the production cost, and the quality control of the top screw thread brings inconvenience.

In order to achieve the above object, the technical solution adopted in the utility model is:

An improved jackscrew mechanism for fracturing and gas production wellheads, characterized in that it includes a jackscrew, a pressure cap and a jackscrew hole arranged on the wellhead spool, the jackscrew is embedded into the jackscrew hole through the pressure cap,

The top wire hole is a two-stage stepped hole, including a front end and a rear end, the aperture of the front end is smaller than the aperture of the rear end,

The jacking wire is a five-stage stepped shaft, the head of the jacking wire is a large end and a conical surface, embedded in the front end of the jacking wire hole,

The pressure cap is a sleeve structure, and is provided with internal and external threads, the internal thread of the pressure cap is screwed with the external thread arranged in the middle of the top wire, and the external thread of the pressure cap is arranged at the rear end of the top wire hole Tighten the inner thread of the part.

The aforementioned improved jackscrew mechanism for fracturing and gas production wellheads is characterized in that: the front end of the jackscrew hole is a light hole.

The aforementioned improved jackscrew mechanism for fracturing and gas production wellheads is characterized in that it further includes a first sealing ring, and the first sealing ring is installed between the jacking wire and the pressure cap.

The aforementioned improved jackscrew mechanism for fracturing and gas production wellheads is characterized in that: the inner wall of the pressure cap is provided with an annular mounting groove for placing the first sealing ring.

The aforementioned improved jackscrew mechanism for fracturing and gas production wellheads is characterized in that it also includes a second sealing ring, which is sleeved on the polished rod in the middle of the jackscrew and is located behind the jackscrew hole. inside the end.

The aforementioned improved jackscrew mechanism for fracturing and gas production wellheads is characterized in that: the two sides of the second sealing ring are also provided with sealing ring seats, and the sealing ring seats on one side are against the front end of the pressure cap, and the other The sealing ring seat on one side is against the junction of the front end and the rear end of the top screw hole.

The beneficial effects of the utility model are: the utility model improves the jackscrew mechanism for fracturing and gas production wellheads, the jackscrew is embedded into the jackscrew hole through the pressure cap, and the jackscrew hole is a two-stage step hole, including the front end and the rear The end part is provided with an internal thread for tightening the pressure cap at the rear end, which is convenient for processing and testing the quality of the internal thread, which not only ensures the function of the jacking screw mechanism, but also facilitates processing and quality inspection. The sealing effect of the wire mechanism has a good application prospect.

Description of drawings

Fig. 1 is a schematic structural view of the jackscrew mechanism for the improved fracturing and gas production wellhead of the present invention.

Fig. 2 is a schematic structural view of the jack wire of the present invention.

Fig. 3 is a structural schematic diagram of the pressing cap of the present invention.

detailed description

The utility model will be further described below in conjunction with the accompanying drawings of the description.

As shown in Figure 1, the improved fracturing and gas production wellhead jackscrew mechanism of the present utility model includes a jackscrew 2, a pressure cap 3 and a jackscrew hole 1 arranged on the wellhead cross, and the jackscrew 2 passes through The pressing cap 3 is embedded in the top wire hole 1,

The top wire hole 1 is a two-stage stepped hole, including a front end and a rear end, the aperture of the front end is smaller than the aperture 102 of the rear end,

As shown in Figure 2, the jackscrew 2 is a five-stage stepped shaft, and the head of the jackscrew 2 is a large end and a conical surface, embedded in the front end of the jackscrew hole,

As shown in Figure 3, the pressure cap 3 is a sleeve structure, and is provided with internal and external threads, the internal thread 12 of the pressure cap 3 is screwed together with the external thread 21 arranged in the middle of the top screw 2, the pressure cap The external thread 11 of 3 cooperates and tightens with the internal thread that is arranged on the jackscrew hole 1 rear end.

The front end of the jacking wire hole is a light hole for nesting the big end of the head of the jacking wire 2 .

The utility model also includes a first sealing ring 4, the first sealing ring 4 is installed between the top wire 2 and the pressure cap 3, and is used to seal the gap between the pressure cap 3 and the top wire 2 to prevent fluid from flowing out.

The inner wall of the pressure cap 3 is provided with an annular mounting groove for placing the first sealing ring 4 .

During use, the external thread 11 of the pressing cap 3 cooperates with the internal thread of the jackscrew hole 1, and by screwing the pressing cap 3, the internal thread 12 of the pressing cap 3 cooperates with the external thread 21 of the jacking wire 2, and by screwing the jacking screw 2 , to realize the front and rear movement of the top wire 2 in the top wire hole 1, and complete the installation of the four-way top wire structure of the tubing head.

The utility model also includes a second sealing ring 5, the second sealing ring 5 is set on the polished rod in the middle of the top wire 2, and is located in the rear end of the top wire hole 1, and the two sides of the second sealing ring 5 are also provided with There is a sealing ring seat 6, the sealing ring seat 6 on one side is against the front end of the pressure cap 3, and the sealing ring seat 6 on the other side is against the junction of the front and rear ends of the top wire hole 1, so that the second sealing ring 5 can be used For the sealing function of top wire hole 1 and top wire 2.

The jacking screw mechanism of the utility model changes the front end of the jacking screw hole from a threaded hole to a light hole, and adds an internal thread on the inner wall of the pressure cap to adjust the position of the jacking screw, reduces the difficulty of processing, facilitates quality control, and adds a sealing The ring improves the sealing effect.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (6)

1. the pressure break improved, gas production wellhead jackscrew mechanism, it is characterised in that: the top wire hole comprising jackscrew, pressure cap and being arranged on well head four-way, described jackscrew is embedded in top wire hole by pressure cap,

Described top wire hole is two grades of step holes, comprises leading section and rearward end, and the aperture of described leading section is less than the aperture of rearward end,

Described jackscrew is Pyatyi stage axle, and the head of described jackscrew is big end and is cone surface, is embedded in the leading section of top wire hole,

Described pressure cap is cover class formation, and is provided with internal and external threads, and the outside screw in the middle part of jackscrew coordinates stubborn connecing to the internal thread of described pressure cap with being arranged on, and the outside screw of described pressure cap is tightened with the screw-internal thread fit being arranged on top wire hole rearward end.

2. the pressure break of a kind of improvement according to claim 1, gas production wellhead jackscrew mechanism, it is characterised in that: the leading section of described top wire hole is unthreaded hole.

3. the pressure break of a kind of improvement according to claim 1, gas production wellhead jackscrew mechanism, it is characterised in that: also comprising the first sealing-ring, described first sealing-ring is arranged between jackscrew, pressure cap.

4. the pressure break of a kind of improvement according to claim 3, gas production wellhead jackscrew mechanism, it is characterised in that: the inwall of described pressure cap is provided with the annular mounting groove for placing the first sealing-ring.

5. the pressure break of a kind of improvement according to claim 1, gas production wellhead jackscrew mechanism, it is characterised in that: also comprise the 2nd sealing-ring, on the polished rod of described 2nd ring set in the middle part of jackscrew, and be positioned at the rearward end of top wire hole.

6. the pressure break of a kind of improvement according to claim 5, gas production wellhead jackscrew mechanism, it is characterized in that: the both sides of described 2nd sealing-ring are also provided with sealing-ring seat, the sealing-ring seat of side supports pressure cap front end, and the sealing-ring seat of another side supports the boundary place, forward and backward end of top wire hole.