Double-tubing mining tubing head

Abstract

The utility model discloses a double-tube mining tubing head, which belongs to the field of well mouths and comprises a double-tube tubing head body, a double-tube tubing hanger, a manual flat valve, a jackscrew assembly, a positioning pin assembly and a pressure gauge. The double-pipe exploitation tubing head is used for hanging two parallel tubing pipes, and when drilling fluid needs to be pumped in and oil gas needs to be exploited at the same time in oil exploitation, operation can be conducted through the two parallel tubing pipes hung on the tubing head. The oil pipe head adopts a split type double-pipe oil pipe hanger, and two oil pipes can be respectively tripped into a well; a positioning pin is designed on the side face of the tubing head body, it can be guaranteed that the double-tubing tubing hanger is hung in place, and it is guaranteed that the double-tubing tubing hanger can be accurately in butt joint with a Christmas tree in the later period. The double-pipe exploitation tubing head solves the problem that a single-pipe tubing head cannot pump drilling fluid and collect oil gas at the same time.

Description

Technical Field

[0001] The utility model relates to the field of wellheads, in particular to a double-tube production oil pipe head. Background Art

[0002] During the oil and gas extraction process, the tubing head is a device component that connects the top casing head and the oil (gas) tree. Its function is to suspend the oil pipe lowered into the well and seal the annular space between the casing and the oil pipe. Conventional tubing heads can only suspend a single oil pipe and cannot perform pumping and oil and gas extraction operations at the same time. They cannot control and regulate the liquid in and out of the wellhead, resulting in low operating efficiency. Summary of the invention

[0003] The utility model aims to provide a double-tube production oil pipe head, which can carry out oil and gas production while the drilling fluid is in and out.

[0004] In view of the shortcomings of the previous single-tube oil tubing head, this time a double-tube production oil tubing head is specifically designed. The oil tubing head can hang two oil pipes to form two channels, which can simultaneously enter and exit drilling fluid and oil and gas. The hanger adopts a split structure, which greatly improves the efficiency of drilling and oil production operations.

[0005] The utility model provides the following technical solution: a double-tube oil pipe head for production, comprising a double-tube oil pipe hanger assembly (12) hanging in a double-tube oil pipe head body (1), the hanger adopts a split structure, the position of the hanger is positioned by a positioning pin assembly (16), and the main seal of the oil pipe hanger is activated by tightening the top screw assembly (11), the left outlet of the oil pipe head is composed of a manual flat valve (3), a steel ring (4), a nut (5), a stud bolt (6), a threaded bolt (15), and a flange (14), and is used The right outlet is composed of a manual flat valve (3), a steel ring (4), a nut (5), a stud bolt (6), a threaded bolt (15), a threaded flange (7), a joint (8), a pressure gauge (9), and a right-angle stop valve (10) for pumping drilling fluid. The outlet is used to detect the annular pressure. The secondary seal at the bottom of the tubing head is a P-type sealing ring (17). When the P-type sealing ring (17) needs to be activated, the external hexagonal pipe plug (13) is removed to observe the amount of grease injection, and the sealing grease is injected through the grease injection valve (2).

[0006] Preferably, a positioning pin assembly (16) is installed in the double-tube tubing head body (1) to position the double-tube tubing hanger assembly (12).

[0007] Preferably, the main seal of the dual-tube tubing hanger assembly (12) is activated by tightening the top screw assembly (11).

[0008] Preferably, the left side outlet of the dual-tube production tubing head is a union flange (14) for pumping in drilling fluid.

[0009] Preferably, the right outlet of the dual-tube production tubing head is connected to a pressure gauge (9) and a right-angle stop valve (10) for detecting the annular space pressure.

[0010] Preferably, a P-type sealing ring (17) is provided at the bottom of the dual-tube production tubing head, and sealing grease is injected through a grease injection valve (2) for secondary sealing of the casing.

[0011] The beneficial effects of the utility model are as follows: the double-tube production tubing head provided by the utility model has a split structure for the hanger, which is convenient for lowering the tubing; secondly, all pressure-bearing parts are integral forgings, which have higher body strength and better safety; furthermore, due to its dual-path design, it has faster and more efficient drilling and oil production capabilities compared to other traditional single-tube tubing heads. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] In the figure: 1, double-tube oil pipe head body 2, grease injection valve 3, manual flat valve 4, steel ring 5, nut 6, stud bolt 7, threaded flange 8, joint 9, pressure gauge 10, right-angle stop valve 11, top screw assembly 12, double-tube oil pipe hanger assembly 13, external hexagonal pipe plug 14, union flange 15, planting bolt 16, locating pin assembly 17, P-type sealing ring. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further explained below in conjunction with the accompanying drawings.

[0015] As shown in the figure, the high-pressure wellhead back pressure valve delivery tool comprises: a double-tube tubing head body 1, a grease injection valve 2, a manual flat valve 3, a steel ring 4, a nut 5, a stud bolt 6, a threaded flange 7, a joint 8, a pressure gauge 9, a right-angle stop valve 10, a top screw assembly 11, a double-tube tubing hanger assembly 12, an external hexagonal pipe plug 13, a union flange 14, a threaded bolt 15, a positioning pin assembly 16, and a P-type sealing ring 17; the characteristic is that the double-tube tubing hanger assembly (12) is hung in the double-tube tubing head body (1), the hanger adopts a split structure, the position of the hanger is positioned by the positioning pin assembly (16), and the main seal of the tubing hanger is activated by tightening the top screw assembly (11). The left outlet of the tubing head is composed of a manual flat valve (3), a steel ring (4), a nut (5), a stud bolt (6), a threaded bolt (15), and a flange (14) for pumping drilling fluid. The right outlet is composed of a manual flat valve (3), a steel ring (4), a nut (5), a stud bolt (6), a threaded bolt (15), a threaded flange (7), a joint (8), a pressure gauge (9), and a right-angle stop valve (10) for detecting annular pressure. The secondary seal at the bottom of the tubing head is a P-type sealing ring (17). When the P-type sealing ring (17) needs to be activated, the external hexagonal pipe plug (13) is removed to facilitate observation of the amount of grease injection, and sealing grease is injected through the grease injection valve (2).

[0016] Preferably, a positioning pin assembly (16) is installed in the double-tube tubing head body (1) to position the double-tube tubing hanger assembly (12).

[0017] Preferably, the main seal of the dual-tube tubing hanger assembly (12) is activated by tightening the top screw assembly (11).

[0018] Preferably, the left side outlet of the dual-tube production tubing head is a union flange (14) for pumping in drilling fluid.

[0019] Preferably, the right outlet of the dual-tube production tubing head is connected to a pressure gauge (9) and a right-angle stop valve (10) for detecting the annular space pressure.

[0020] Preferably, a P-type sealing ring (17) is provided at the bottom of the dual-tube production tubing head, and sealing grease is injected through a grease injection valve (2) for secondary sealing of the casing.

[0021] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Double-tube production tubing head, characterized by: The invention comprises a double-tube tubing hanger assembly (12) which is hung in a double-tube tubing head body (1). The hanger adopts a split structure. The position of the hanger is positioned by a positioning pin assembly (16). The main seal of the tubing hanger is activated by tightening a top screw assembly (11). The left outlet of the tubing head is composed of a manual flat valve (3), a steel ring (4), a nut (5), a stud bolt (6), a threaded bolt (15), and a flange (14) for pumping drilling fluid. The right outlet It is composed of a manual flat valve (3), a steel ring (4), a nut (5), a stud bolt (6), a threaded bolt (15), a threaded flange (7), a joint (8), a pressure gauge (9), and a right-angle stop valve (10). It is used to detect the annular space pressure. The secondary seal at the bottom of the tubing head is a P-type sealing ring (17). When it is necessary to stimulate the P-type sealing ring (17), the external hexagonal pipe plug (13) is removed to facilitate observation of the grease injection amount, and sealing grease is injected through the grease injection valve (2).

2. The dual-tube production tubing head according to claim 1, characterized in that: The double-tube tubing head body (1) is provided with a positioning pin assembly (16) for positioning the double-tube tubing hanger assembly (12).

3. The dual-tube production tubing head according to claim 1, characterized in that: The main seal of the dual-tube oil pipe hanger assembly (12) is activated by tightening the top screw assembly (11).

4. The dual-tube production tubing head according to claim 1, characterized in that: The left side outlet of the double-tube production tubing head is a union flange (14) for pumping in drilling fluid.

5. The dual-tube production tubing head according to claim 1, characterized in that: The right outlet of the dual-tube production tubing head is connected to a pressure gauge (9) and a right-angle stop valve (10) for detecting the annular space pressure.

6. The dual-tube production tubing head according to claim 1, characterized in that: A P-type sealing ring (17) is arranged at the bottom of the dual-tube production tubing head, and sealing grease is injected through a grease injection valve (2) to provide secondary sealing for the casing.

Images