Coiled tubing guide head

Abstract

The utility model relates to a coiled tubing guide head. According to the technical scheme, the lower end of a locking rod is connected with one end of a locking conical head through threads, a stress application hole is formed in the outer wall of the locking conical head, a rotating rod is inserted into the stress application hole to drive the locking conical head to rotate, and the other end of the locking conical head is connected with a traction steel wire rope through a connector; a limiting protrusion is arranged at the outer end of the locking rod, a middle rod body of the locking rod is of a cone structure, the locking rod is wrapped by more than one slip, a groove hole matched with the limiting protrusion is formed in the outer end of each slip, and more than one group of clamp springs are installed on the outer wall of each slip. Compared with the prior art, the safety protection device has the advantages of being simple in structure, high in practicability, firm, durable, convenient to operate and the like, working efficiency is improved, labor intensity is reduced, safety of production operation is improved, personal injuries caused by fire operation and high-place operation of personnel can be effectively prevented, and the safety production effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum workover coiled tubing operation, especially to a coiled tubing guide head. BACKGROUND

[0002] At present, coiled tubing operation is a kind of workover operation mode widely used in the field of petroleum workover operation, and coiled tubing is a pipe column with certain length, no coupling, high strength, good plasticity and strong corrosion resistance, which is coiled on the tubing drum of coiled tubing operation vehicle. The coiled tubing is connected with the tools needed in the well through the cooperation of the transportation of the injection head and the rotation of the drum of the operation vehicle to complete the continuous up and down, and the coiled tubing is connected with the tools needed in the well through the connector to complete the work such as boring, injection, measurement and so on. At present, due to the functional limitation of the injection head, the holding block of the injection head causes the coiled tubing to be unable to enter freely, and the front end of the coiled tubing needs to be deformed or assisted to guide, so that the coiled tubing can smoothly enter the injection head.

[0003] There are many forms and methods for the coiled tubing to enter the injection head. One is to use cutting tools to cut the front end of the coiled tubing on the operation site, so that the cross section of the front end of the coiled tubing is at an angle of 45 degrees, and a wheel type crane (hoist) is used for traction, and workers stand on the injection head to guide the insertion. This way needs complicated approval procedures for fire operation in oil and gas environment, and workers standing on the high injection head have a certain risk of falling from a height. The second is to use melting welding and hot cutting method to weld the traction steel wire rope at the front end of the coiled tubing on the operation site, and the front end of the coiled tubing has a certain taper, and the steel wire rope is used for connection. After connection, the steel wire rope is inserted into the injection head to guide the coiled tubing to enter the injection head. This way also involves fire operation in oil and gas environment, and needs complicated fire operation approval procedures, which brings fire risk. The third is Chinese patent authorization announcement No. CN203685077U, and the patent name is "continuous oil pipe injection head fast insertion guide chain", which includes locking shaft, connecting sleeve and plug. The lower end of the locking shaft is connected with the upper end of the connecting sleeve through thread, and the upper end of the plug is hinged to the lower end of the connecting sleeve. The locking shaft is externally sleeved with a clamping device for clamping on the inner wall of the coiled tubing. The lower end of the connecting sleeve is connected with the plug through at least one universal joint. The upper and lower ends of the universal joint are respectively hinged with the connecting sleeve and the plug, so that the coiled tubing can be quickly guided into the injection head without the cooperation of the crane. The above-mentioned patent structure is complex, and the manufacturing cost is high. And from the site practice, research or the yield strength or bending degree of the coiled tubing, if the traction rope (steel wire rope) is not used to pull the guide chain or the guide pipe, the coiled tubing cannot be aligned with the injection head entrance. UTILITY MODEL CONTENTS

[0004] The utility model discloses a continuous oil pipe guide head, solves the problem that the front end of the continuous oil pipe cannot be aligned with the injection head and freely enter the injection head, and has simple structure and low manufacturing cost.

[0005] The utility model discloses a continuous oil pipe guide head, solves the problem that the front end of the continuous oil pipe cannot be aligned with the injection head and freely enter the injection head, and has simple structure and low manufacturing cost.

[0006] Preferably, the half-round shaped slip body (1.4) is provided with a first snap spring groove (1.2) and a second snap spring groove (1.5) on the outer wall thereof for installing the snap spring (6).

[0007] Preferably, the inner cavity of the half-round shaped slip body (1.4) is provided with a half-round conical cavity (1.3) in communication with the slot hole (1.1) on the side with larger inner diameter.

[0008] Preferably, the locking rod (2) comprises a limiting protrusion (2.1), a locking rod main body (2.2), a connecting head (2.3) and an external thread (2.4), the locking rod main body (2.2) is in conical structure, the limiting protrusion (2.1) in rectangular structure is arranged at one end of the locking rod main body (2.2) for cooperating with the slot hole (1.1); the connecting head (2.3) is arranged at the other end of the locking rod main body (2.2), and the external thread (2.4) is arranged outside the connecting head (2.3) for connecting and cooperating with the internal thread of the locking conical head (3).

[0009] Preferably, the length of the limiting protrusion (2.1) is greater than the outer diameter of the thick end of the locking rod main body (2.2), and the length of the limiting protrusion (2.1) is less than the inner diameter of the slot hole (1.1).

[0010] Preferably, the outer end of the traction steel wire rope (4) is connected with the connecting head (4.1), and the connecting head (4.1) is in conical structure for cooperating with the conical cavity at the inner cavity end of the locking conical head (3).

[0011] The utility model discloses the beneficial effect is: the utility model discloses through manual clockwise rotation locking conical head, locking rod moves down, because the setting into conical structure in slip, slip expands outward under the force action of locking rod, locking rod tightens in the inner wall of continuous oil pipe, and then through the force hole on locking conical head, makes slip tension increase with the form of force bar, makes slip tightly and lock together with continuous oil pipe, the utility model discloses have simple structure, practicality is strong, solid durable, convenient operation etc. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the locking state appearance schematic drawing of sending into the inner wall of continuous oil pipe of the utility model;

[0013] Figure 2 It is Figure 1 A-A section schematic drawing of the utility model;

[0014] Figure 3 It is the whole appearance schematic drawing of the utility model from the withdrawal of the inner wall of continuous oil pipe;

[0015] Figure 4 It is Figure 3 B-B section schematic drawing of the utility model;

[0016] Figure 5 It is the structure schematic drawing of two slips combination together and not installing snap spring;

[0017] Figure 6 It is the structure schematic drawing of locking rod;

[0018] Figure 7 It is the end view of locking rod;

[0019] Figure 8 It is the end surface schematic drawing of locking rod installation in two slips;

[0020] In the above figure: slip 1, locking rod 2, locking conical head 3, traction steel wire rope 4, force hole 5, snap spring 6, continuous oil pipe 7, slot hole 1.1, first snap spring recess 1.2, semicircular conical cavity 1.3, semicircular slip body 1.4, second snap spring recess 1.5, limiting protrusion 2.1, locking rod main body 2.2, connecting head 2.3 and outer thread 2.4, joint 4.1. DETAILED DESCRIPTION

[0021] The preferred embodiments of the utility model are described below in conjunction with the drawings, and it should be understood that the preferred embodiments described here are only for illustrating and explaining the utility model, and are not used to limit the utility model.

[0022] Embodiment 1, refer to Figures 1-8 The utility model discloses a coiled tubing guide head, including slip 1, locking lever 2, locking conical head 3, traction steel wire rope 4, force hole 5 and clasp spring 6, the lower extreme of locking lever 2 is connected with the one end of locking conical head 3 through the thread, is equipped with force hole 5 on the outer wall of locking conical head 3, through the rotation lever is inserted into force hole 5 and drives locking conical head 3 to rotate, the other end of locking conical head 3 is connected traction steel wire rope 4 through connector 4.1, the outer end of locking lever 2 is equipped with limit protrusion 2.1, and the middle part rod body of locking lever 2 is the conical structure, and more than one slip 1 is wrapped outside locking lever 2, and the outer end of slip 1 is equipped with the slot hole 1.1 that cooperates with limit protrusion 2.1, and more than one clasp spring 6 is installed on the outer wall of slip 1.

[0023] Refer to Figure 5 And Figure 8 The utility model discloses the slip 1 adopts two symmetrical semicircular slip body 1.4 to form, and is equipped with first clasp spring groove 1.2 and second clasp spring groove 1.5 on the outer wall of semicircular slip body, is used for installing the clasp spring 6 of C type structure respectively, makes two semicircular slip body 1.4 form an entirety and is wrapped outside locking lever 2.

[0024] Among them, the inner cavity of the semicircular slip body 1.4 is provided with a semicircular conical cavity 1.3, and the side with a larger inner diameter is in communication with the slot hole 1.1.

[0025] Refer to Figure 6 And Figure 7 The utility model discloses the locking lever 2 includes limit protrusion 2.1, locking lever main part 2.2, connector 2.3 and outer thread 2.4, and the locking lever main part 2.2 is the conical structure, is equipped with the limit protrusion 2.1 of rectangular structure in the one end of locking lever main part 2.2, is used for with slot hole 1.1 cooperation, is equipped with connector 2.3 in the other end of locking lever main part 2.2, is equipped with outer thread 2.4 outside connector 2.3, is used for with the inner thread connection cooperation of locking conical head 3.

[0026] Among them, the length of the limit protrusion 2.1 is greater than the outer diameter of the thick end of the locking lever main part 2.2, and the length of the limit protrusion 2.1 is less than the inner diameter of the slot hole 1.1.

[0027] In addition, the outer end of the traction steel wire rope 4 is connected with the connector 4.1, and the connector 4.1 is a conical structure for cooperating with the conical cavity of the inner cavity end of the locking conical head 3.

[0028] The utility model uses, inserts the slip part of the utility model into the inner hole of the front end of the coiled tubing 7, rotates the locking conical head 3 clockwise, the locking rod 2 moves downward, under the action of the locking rod main body 2.2 of conical structure, the force of expansion is greater than the elasticity of two groups of C type clamping spring 6, makes two slips 1 expand outward, further, the outer wall of slip 1 is in close contact on the inner wall of coiled tubing 7, then, the traction wire rope 4 under the locking conical head 3 is passed through the goose neck pipe and is inserted into the injection head and blowout preventer, and a section of wire rope appears at the lower end of blowout preventer, and the wire rope is pulled by manual force on the ground, so that the utility model can freely and smoothly enter the well; when the utility model needs to be withdrawn, the locking conical head 3 can be rotated counterclockwise, under the action of the elasticity of clamping spring 6, the slip part is contracted, so that it can be taken out from the inner wall of coiled tubing 7.

[0029] In embodiment 2, the utility model discloses a coiled tubing guide head, which comprises a slip 1, a locking rod 2, a locking conical head 3, a traction wire rope 4, a force hole 5 and a clamping spring 6.

[0030] The difference between the utility model and embodiment 1 is that:

[0031] The limiting protrusion 2.1 of the locking rod 2 of the utility model adopts a circular structure, is used for cooperating with the circular slot hole 1.1, the outer diameter of the limiting protrusion 2.1 is greater than the outer diameter of the thick head end of the locking rod main body 2.2, and the length of the limiting protrusion 2.1 is less than the inner diameter of the slot hole 1.1, and the structure can also realize the function of the utility model.

[0032] The utility model discloses a coiled tubing guide head, including slip 1, locking lever 2, locking conical head 3, traction steel wire rope 4, force hole 5 and clasp spring 6, the lower extreme of locking lever 2 is with the one end of locking conical head 3 through the thread connection, is equipped with force hole 5 on the outer wall of locking conical head 3, through the rotation lever is inserted into force hole 5 and drives locking conical head 3 to rotate, the other end of locking conical head 3 is connected traction steel wire rope 4 through joint 4.1, the outer end of locking lever 2 is equipped with limit protrusion 2.1, and the middle part rod body of locking lever 2 is the conical structure, and is wrapped with more than one slip 1 on the outside of locking lever 2, the outer end of slip 1 is equipped with the slot hole 1.1 cooperation with limit protrusion 2.1, and is installed more than one clasp spring 6 on the outer wall of slip 1.

[0033] The difference from example 1 or 2 is:

[0034] The limit protrusion 2.1 of the locking lever 2 mentioned in the utility model adopts a rectangular structure, which is used for cooperation with the slot hole 1.1 of a larger rectangular structure, and the outer diameter of the limit protrusion 2.1 is greater than the outer diameter of the thick end of the locking lever main body 2.2, and the size of the limit protrusion 2.1 is smaller than the size of the rectangular slot hole 1.1. When the locking lever 2 rotates, the limit protrusion 2.1 rotates along the rectangular slot hole 1.1. The gap between the two can meet the needs of the expansion of the slip 1 and the fastening of the inner wall of the coiled tubing. The structure can also realize the function of the utility model.

[0035] The above is only the preferred embodiment of the utility model, and any skilled person in the art can modify the utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modification or equivalent transformation according to the technical solution of the utility model is within the scope of protection required by the utility model.

Claims

1. A coiled tubing guide head characterized by: The utility model relates to a locking device for the steel wire rope, including the jaw (1), locking lever (2), locking conical head (3), traction steel wire rope (4), force hole (5) and clamping spring (6), the lower end of locking lever (2) is connected with the one end of locking conical head (3) through the thread, is equipped with force hole (5) on the outer wall of locking conical head (3), rotates locking conical head (3) through the clamping of the rotating lever insertion to force hole (5), the other end of locking conical head (3) is connected traction steel wire rope (4) through joint (4.1), the outer end of locking lever (2) is equipped with the limit protrusion (2.1), and the middle rod body of locking lever (2) is the conical structure, and more than one jaw (1) is wrapped outside locking lever (2), and the outer end of jaw (1) is equipped with the slot hole (1.1) with the limit protrusion (2.1), and more than one clamping spring (6) is installed on the outer wall of jaw (1), The locking lever (2) includes a limit protrusion (2.1), a locking lever body (2.2), a connecting head (2.3), and an external thread (2.4). The locking lever body (2.2) is conical in structure. A limit protrusion (2.1) with a rectangular structure is arranged at one end of the locking lever body (2.2) to cooperate with the slot hole (1.1). A connecting head (2.3) is arranged at the other end of the locking lever body (2.2), and an external thread (2.4) is arranged outside the connecting head (2.3) to connect and cooperate with the internal thread of the locking conical head (3). The length of the limit protrusion (2.1) is greater than the outer diameter of the thick end of the locking lever body (2.2), and the length of the limit protrusion (2.1) is less than the inner diameter of the slot hole (1.1).

2. A coiled tubing guide head according to claim 1, characterized in that: The jaw (1) is composed of two symmetrical semicircular jaw bodies (1.4), and a first clamping spring groove (1.2) and a second clamping spring groove (1.5) are arranged on the outer wall of the semicircular jaw body to install the clamping spring (6).

3. A coiled tubing guide head according to claim 2, characterized in that: The inner cavity of the semicircular jaw body (1.4) is provided with a semicircular conical cavity (1.3), and the side with a larger inner diameter is in communication with the slot hole (1.1).

4. The coiled tubing guide head of claim 1, wherein: The outer end of the traction steel wire rope (4) is connected with the joint (4.1), and the joint (4.1) is conical in structure to cooperate with the conical cavity at the end of the inner cavity of the locking conical head (3).

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